首页 > 最新文献

Electrical Engineering & Electromechanics最新文献

英文 中文
Harmonics suppression in high-speed railway via single-phase traction converter with an LCL filter using fuzzy logic control strategy 利用模糊逻辑控制策略,通过带 LCL 滤波器的单相牵引变流器抑制高速铁路谐波
Pub Date : 2024-02-24 DOI: 10.20998/2074-272x.2024.2.03
M. Aissaoui, H. Bouzeria, M. Benidir, M. A. Labed
Introduction. The railway Traction Power Supply System (TPSS) encounters a common challenge related to high-frequency harmonic resonance, especially when employing AC-DC-AC traction drive systems in high-speed trains. This resonance issue arises when the harmonic elements introduced by the traction AC-DC converter on the grid side of trains align with the innate resonance frequency of the TPSS. The novelty the proposed work focuses on the challenges associated with resonance elevation and high-frequency harmonics in high-speed trains, while simultaneously enhancing energy quality. This is achieved by integrating a pulse-width-modulated converter on the grid side with a single-phase configuration and incorporating an LCL filter. Methodology. In order to optimize the system’s efficiency, a robust control system is employed, taking advantage of the capabilities of a fuzzy logic controller (FLC). The choice of the FLC is justified by its straightforward design and reliability, emphasizing the dedication to precise control, as fuzzy logic excels in handling complex, nonlinear systems. Through the use of linguistic variables and heuristic reasoning, the FLC adjusts to dynamic changes in the system, demonstrating its efficacy in enhancing both transient and steady-state responses. Practical value. A grid-side LCL filter-based converter was meticulously designed and rigorously simulated using the MATLAB/Simulink platform. The inclusion of an advanced FLC in the system introduced a novel approach to control strategies, surpassing the traditional PI controller. Through a comprehensive comparative analysis, the simulation results showcased the remarkable efficacy of the proposed solution in an effectively mitigating high-frequency resonance within the TPSS. This outcome underscores the potential of FLC as a sophisticated control mechanism for enhancing the performance systems in railway applications, showcasing its superiority over conventional control methods. The study contributes in shedding light on innovative approaches for optimizing the control and efficiency of grid-side LCL filter-based converters in high-speed train systems.
引言铁路牵引供电系统(TPSS)会遇到一个与高频谐波共振有关的共同挑战,尤其是在高速列车中采用交流-直流-交流牵引驱动系统时。当列车电网侧牵引交流-直流转换器引入的谐波元素与 TPSS 的固有谐振频率一致时,就会产生谐振问题。所提工作的新颖之处在于,在提高能源质量的同时,重点解决了与高速列车谐振提升和高频谐波相关的挑战。这是通过在电网侧集成一个单相配置的脉宽调制转换器和一个 LCL 滤波器来实现的。方法。为了优化系统效率,利用模糊逻辑控制器 (FLC) 的功能,采用了稳健控制系统。选择 FLC 的理由是其简单的设计和可靠性,强调精确控制,因为模糊逻辑擅长处理复杂的非线性系统。通过使用语言变量和启发式推理,FLC 可根据系统的动态变化进行调整,从而证明其在增强瞬态和稳态响应方面的功效。实用价值。我们使用 MATLAB/Simulink 平台对基于 LCL 滤波器的电网侧变流器进行了精心设计和严格模拟。在系统中加入先进的 FLC,为控制策略引入了一种新方法,超越了传统的 PI 控制器。通过全面的比较分析,仿真结果表明所提出的解决方案在有效缓解 TPSS 内的高频共振方面具有显著功效。这一结果凸显了 FLC 作为一种先进的控制机制在提高铁路应用系统性能方面的潜力,显示出其优于传统控制方法的优势。这项研究有助于阐明在高速列车系统中优化基于电网侧 LCL 滤波器的转换器的控制和效率的创新方法。
{"title":"Harmonics suppression in high-speed railway via single-phase traction converter with an LCL filter using fuzzy logic control strategy","authors":"M. Aissaoui, H. Bouzeria, M. Benidir, M. A. Labed","doi":"10.20998/2074-272x.2024.2.03","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.2.03","url":null,"abstract":"Introduction. The railway Traction Power Supply System (TPSS) encounters a common challenge related to high-frequency harmonic resonance, especially when employing AC-DC-AC traction drive systems in high-speed trains. This resonance issue arises when the harmonic elements introduced by the traction AC-DC converter on the grid side of trains align with the innate resonance frequency of the TPSS. The novelty the proposed work focuses on the challenges associated with resonance elevation and high-frequency harmonics in high-speed trains, while simultaneously enhancing energy quality. This is achieved by integrating a pulse-width-modulated converter on the grid side with a single-phase configuration and incorporating an LCL filter. Methodology. In order to optimize the system’s efficiency, a robust control system is employed, taking advantage of the capabilities of a fuzzy logic controller (FLC). The choice of the FLC is justified by its straightforward design and reliability, emphasizing the dedication to precise control, as fuzzy logic excels in handling complex, nonlinear systems. Through the use of linguistic variables and heuristic reasoning, the FLC adjusts to dynamic changes in the system, demonstrating its efficacy in enhancing both transient and steady-state responses. Practical value. A grid-side LCL filter-based converter was meticulously designed and rigorously simulated using the MATLAB/Simulink platform. The inclusion of an advanced FLC in the system introduced a novel approach to control strategies, surpassing the traditional PI controller. Through a comprehensive comparative analysis, the simulation results showcased the remarkable efficacy of the proposed solution in an effectively mitigating high-frequency resonance within the TPSS. This outcome underscores the potential of FLC as a sophisticated control mechanism for enhancing the performance systems in railway applications, showcasing its superiority over conventional control methods. The study contributes in shedding light on innovative approaches for optimizing the control and efficiency of grid-side LCL filter-based converters in high-speed train systems.","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"38 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140434918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling and analysis of electro-thermal processes in installations for induction heat treatment of aluminum cores of power cables 电力电缆铝芯感应热处理装置中电热过程的建模与分析
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.07
A. Shcherba, O. D. Podoltsev, N. Suprunovska, R. V. Bilianin, T. Antonets, I. M. Masluchenko
Introduction. The development of the electric power industry is directly related to the improvement of cable lines. Cable lines meet modern requirements for reliability, they are increasingly used. Problem. Currently, power cables with an aluminum multi-conductor core, which requires heat treatment - an annealing process at the stage of the technological manufacturing process, are widespread. This process makes it possible to desirably reduce the electrical resistance of the wire and increase its flexibility. For effective use of induction heating during annealing of an aluminum core, it is necessary to determine the optimal frequency of the power source of the inductor. Considering the long length of the inductor and the large number of its turns, the numerical calculation of the electromagnetic field, which is necessary for calculating the equivalent electrical parameters of the turns of the inductor and its efficiency, requires significant computer resources. The goal is to develop a computer model for calculating electro-thermal processes in an induction plant for heating (up to the annealing temperature) an aluminum core of a power cable moving in the magnetic field of a long multi-turn inductor, as well as obtaining frequency dependences of the equivalent R, L parameters of such an inductor and determining the optimal the value of the frequency of the power source, which corresponds to the maximum value of the electrical efficiency of the inductor. Methodology. The mathematical model was developed to analyze the coupled electromagnetic and thermal processes occurring in a core moving in a time-harmonic magnetic field of an inductor at a constant speed. The differential equations for the electromagnetic and temperature fields, taking into account the boundary conditions, represent a coupled electro-thermal problem that was solved numerically by the finite element method using the Comsol software package. For a detailed analysis of the electromagnetic processes in the inductor, an additional problem was considered at the level of the elementary cell, which includes one turn of the inductor and a fragment of the core located near this turn. Results. According to the results of the calculation of the electromagnetic field in the area of the elementary cell, the equivalent electrical parameters of one turn of the inductor and the entire multi-turn inductor were calculated depending on the frequency of the electric current. The frequency dependences of the electrical efficiency of the inductor were calculated. Originality. Taking into account the design features of the inductor (its long length and large number of turns), the method of multiscale modeling was used. Electro-thermal processes in the core were studied at the macro level, and the distribution of the electromagnetic field and electric current density in the cross-section of the massive copper turn of the inductor was calculated at the micro level – at the level of an elementary cell c
引言电力工业的发展与电缆线路的改进直接相关。电缆线路符合现代可靠性要求,因此得到越来越多的使用。问题目前,使用铝制多芯导线芯的电力电缆非常普遍,这种电缆在技术制造阶段需要进行热处理--退火工艺。这种工艺可以理想地降低导线的电阻并提高其柔韧性。为了在铝芯退火过程中有效使用感应加热,有必要确定电感器电源的最佳频率。考虑到感应器的长度较长,匝数较多,要计算感应器匝数的等效电气参数及其效率,必须对电磁场进行数值计算,这需要大量的计算机资源。我们的目标是开发一个计算机模型,用于计算感应设备中的电热过程,以加热(达到退火温度)在多匝长电感器磁场中移动的电力电缆铝芯,并获得该电感器等效 R、L 参数的频率相关性,以及确定电源频率的最佳值,该值与电感器电气效率的最大值相对应。方法。建立数学模型的目的是分析在感应器时谐磁场中以恒定速度运动的磁芯中发生的电磁和热耦合过程。考虑到边界条件,电磁场和温度场的微分方程代表了一个电热耦合问题,该问题通过使用 Comsol 软件包的有限元法进行数值求解。为了详细分析电感器中的电磁过程,还考虑了基本单元层面的附加问题,其中包括电感器的一个匝和位于该匝附近的磁芯片段。结果根据基本单元区域的电磁场计算结果,计算出了电感器一匝和整个多匝电感器的等效电气参数,这些参数取决于电流的频率。还计算了电感器电气效率的频率相关性。原创性。考虑到电感器的设计特点(长度长、匝数多),采用了多尺度建模方法。在宏观层面上研究了磁芯中的电热过程,在微观层面上计算了电感器大铜匝横截面上的电磁场和电流密度的分布情况,即只包含一匝电感器的基本单元的分布情况。考虑到集肤效应、邻近效应和几何效应,获得了电感器等效 R、L 参数的频率相关性,并研究了电流频率对这些效应的定量影响。实用价值。结果表明,要有效加热直径为 28 毫米的铝芯,频率的最佳值为 1-2 千赫,同时电能效率分别达到 ηind = 0.3-0.33 的值。
{"title":"Modeling and analysis of electro-thermal processes in installations for induction heat treatment of aluminum cores of power cables","authors":"A. Shcherba, O. D. Podoltsev, N. Suprunovska, R. V. Bilianin, T. Antonets, I. M. Masluchenko","doi":"10.20998/2074-272x.2024.1.07","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.07","url":null,"abstract":"Introduction. The development of the electric power industry is directly related to the improvement of cable lines. Cable lines meet modern requirements for reliability, they are increasingly used. Problem. Currently, power cables with an aluminum multi-conductor core, which requires heat treatment - an annealing process at the stage of the technological manufacturing process, are widespread. This process makes it possible to desirably reduce the electrical resistance of the wire and increase its flexibility. For effective use of induction heating during annealing of an aluminum core, it is necessary to determine the optimal frequency of the power source of the inductor. Considering the long length of the inductor and the large number of its turns, the numerical calculation of the electromagnetic field, which is necessary for calculating the equivalent electrical parameters of the turns of the inductor and its efficiency, requires significant computer resources. The goal is to develop a computer model for calculating electro-thermal processes in an induction plant for heating (up to the annealing temperature) an aluminum core of a power cable moving in the magnetic field of a long multi-turn inductor, as well as obtaining frequency dependences of the equivalent R, L parameters of such an inductor and determining the optimal the value of the frequency of the power source, which corresponds to the maximum value of the electrical efficiency of the inductor. Methodology. The mathematical model was developed to analyze the coupled electromagnetic and thermal processes occurring in a core moving in a time-harmonic magnetic field of an inductor at a constant speed. The differential equations for the electromagnetic and temperature fields, taking into account the boundary conditions, represent a coupled electro-thermal problem that was solved numerically by the finite element method using the Comsol software package. For a detailed analysis of the electromagnetic processes in the inductor, an additional problem was considered at the level of the elementary cell, which includes one turn of the inductor and a fragment of the core located near this turn. Results. According to the results of the calculation of the electromagnetic field in the area of the elementary cell, the equivalent electrical parameters of one turn of the inductor and the entire multi-turn inductor were calculated depending on the frequency of the electric current. The frequency dependences of the electrical efficiency of the inductor were calculated. Originality. Taking into account the design features of the inductor (its long length and large number of turns), the method of multiscale modeling was used. Electro-thermal processes in the core were studied at the macro level, and the distribution of the electromagnetic field and electric current density in the cross-section of the massive copper turn of the inductor was calculated at the micro level – at the level of an elementary cell c","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"18 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140517555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Total harmonic distortion analysis of inverter fed induction motor drive using neuro fuzzy type-1 and neuro fuzzy type-2 controllers 使用神经模糊 1 型和神经模糊 2 型控制器的变频器馈电感应电机驱动器的总谐波失真分析
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.02
G. Srinivas, G. Durga Sukumar, M. Subbarao
Introduction. When the working point of the indirect vector control is constant, the conventional speed and current controllers operate effectively. The operating point, however, is always shifting. In a closed-system situation, the inverter measured reference voltages show higher harmonics. As a result, the provided pulse is uneven and contains more harmonics, which enables the inverter to create an output voltage that is higher. Aim. A space vector modulation (SVM) technique is presented in this paper for type-2 neuro fuzzy systems. The inverter’s performance is compared to that of a neuro fuzzy type-1 system, a neuro fuzzy type-2 system, and classical SVM using MATLAB simulation and experimental validation. Methodology. It trains the input-output data pattern using a hybrid-learning algorithm that combines back-propagation and least squares techniques. Input and output data for the proposed technique include information on the rotation angle and change of rotation angle as input and output of produced duty ratios. A neuro fuzzy-controlled induction motor drive’s dynamic and steady-state performance is compared to that of the conventional SVM when using neuro fuzzy type-2 SVM the induction motor, performance metrics for current, torque, and speed are compared to those of neuro fuzzy type-1 and conventional SVM. Practical value. The performance of an induction motor created by simulation results are examined using the experimental validation of a dSPACE DS-1104. For various switching frequencies, the total harmonic distortion of line-line voltage using neuro fuzzy type-2, neuro fuzzy type-1, and conventional based SVMs are provided. The 3 hp induction motor in the lab is taken into consideration in the experimental validations.
简介当间接矢量控制的工作点恒定时,传统的速度和电流控制器就能有效工作。然而,工作点总是在变化。在封闭系统情况下,逆变器测量的参考电压显示出更高的谐波。因此,提供的脉冲是不均匀的,包含更多的谐波,这使得变频器能产生更高的输出电压。目的本文针对 2 型神经模糊系统提出了一种空间矢量调制(SVM)技术。通过 MATLAB 仿真和实验验证,将逆变器的性能与神经模糊 1 型系统、神经模糊 2 型系统和经典 SVM 的性能进行了比较。方法。该系统采用混合学习算法训练输入输出数据模式,该算法结合了反向传播和最小二乘法技术。拟议技术的输入和输出数据包括旋转角度和旋转角度变化的信息,作为生产占空比的输入和输出。在使用神经模糊 2 型 SVM 时,将神经模糊控制感应电机驱动器的动态和稳态性能与传统 SVM 的动态和稳态性能进行了比较,并将电流、转矩和速度的性能指标与神经模糊 1 型和传统 SVM 的性能指标进行了比较。实用价值。通过使用 dSPACE DS-1104 进行实验验证,检验了由仿真结果创建的感应电机的性能。针对不同的开关频率,提供了使用神经模糊 2 型、神经模糊 1 型和基于传统 SVM 的线电压总谐波失真。实验验证考虑了实验室中的 3 马力感应电机。
{"title":"Total harmonic distortion analysis of inverter fed induction motor drive using neuro fuzzy type-1 and neuro fuzzy type-2 controllers","authors":"G. Srinivas, G. Durga Sukumar, M. Subbarao","doi":"10.20998/2074-272x.2024.1.02","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.02","url":null,"abstract":"Introduction. When the working point of the indirect vector control is constant, the conventional speed and current controllers operate effectively. The operating point, however, is always shifting. In a closed-system situation, the inverter measured reference voltages show higher harmonics. As a result, the provided pulse is uneven and contains more harmonics, which enables the inverter to create an output voltage that is higher. Aim. A space vector modulation (SVM) technique is presented in this paper for type-2 neuro fuzzy systems. The inverter’s performance is compared to that of a neuro fuzzy type-1 system, a neuro fuzzy type-2 system, and classical SVM using MATLAB simulation and experimental validation. Methodology. It trains the input-output data pattern using a hybrid-learning algorithm that combines back-propagation and least squares techniques. Input and output data for the proposed technique include information on the rotation angle and change of rotation angle as input and output of produced duty ratios. A neuro fuzzy-controlled induction motor drive’s dynamic and steady-state performance is compared to that of the conventional SVM when using neuro fuzzy type-2 SVM the induction motor, performance metrics for current, torque, and speed are compared to those of neuro fuzzy type-1 and conventional SVM. Practical value. The performance of an induction motor created by simulation results are examined using the experimental validation of a dSPACE DS-1104. For various switching frequencies, the total harmonic distortion of line-line voltage using neuro fuzzy type-2, neuro fuzzy type-1, and conventional based SVMs are provided. The 3 hp induction motor in the lab is taken into consideration in the experimental validations.","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"2 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140519418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and experimental implementation of voltage control scheme using the coefficient diagram method based PID controller for two-level boost converter with photovoltaic system 利用基于系数图法的 PID 控制器,为光伏系统两电平升压转换器设计电压控制方案并进行实验实施
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.01
K. Latreche, R. Taleb, A. Bentaallah, Alla Eddine Toubal Maamar, M. Helaimi, F. Chabni
Introduction. Currently, in the solar energy systems and a variety of electrical applications, the power converters are essential part. The main challenge for similar systems is controller design. In the literature, the PID controller has proved its effectiveness in many industrial applications, but determining its parameters remains one of the challenges in control theory field. The novelty of the work resides in the design and experimental implementation of a two-level boost DC-DC converter controlled by a PID controller for photovoltaic (PV) maximum power extraction. Purpose. Analysis and control of the two-level boost topology with renewable energy source and design of the PID controller parameters using simple and accurate method. Methods. PID coefficients are optimized using Coefficient Diagram Method (CDM) in the MATLAB environment. Results. A mathematical model of a two-level boost converter with PID controller and PV energy source was developed and analyzed. The model allows to design the controller parameters of the proposed system. Practical value. A prototype steered by the proposed CDM-PID controller was tested using an Arduino embedded board. A comparison between the simulation results and the experimental one is presented. The obtained results illustrate that the experimental results match the simulation closely, and the proposed CDM-PID controller provides a fast and precise results.
简介目前,在太阳能系统和各种电气应用中,功率转换器是必不可少的部分。类似系统面临的主要挑战是控制器的设计。在文献中,PID 控制器已在许多工业应用中证明了其有效性,但确定其参数仍是控制理论领域的挑战之一。这项工作的新颖之处在于设计并通过实验实现了一个由 PID 控制器控制的两电平升压直流-直流转换器,用于光伏(PV)最大功率提取。目的分析和控制具有可再生能源的两级升压拓扑结构,并使用简单而精确的方法设计 PID 控制器参数。方法。在 MATLAB 环境中使用系数图法 (CDM) 优化 PID 系数。结果。建立并分析了带有 PID 控制器和光伏能源的两级升压转换器的数学模型。通过该模型可以设计拟议系统的控制器参数。实用价值。使用 Arduino 嵌入式电路板测试了由拟议 CDM-PID 控制器控制的原型。仿真结果与实验结果进行了比较。得出的结果表明,实验结果与仿真结果非常吻合,而且所提出的 CDM-PID 控制器能提供快速、精确的结果。
{"title":"Design and experimental implementation of voltage control scheme using the coefficient diagram method based PID controller for two-level boost converter with photovoltaic system","authors":"K. Latreche, R. Taleb, A. Bentaallah, Alla Eddine Toubal Maamar, M. Helaimi, F. Chabni","doi":"10.20998/2074-272x.2024.1.01","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.01","url":null,"abstract":"Introduction. Currently, in the solar energy systems and a variety of electrical applications, the power converters are essential part. The main challenge for similar systems is controller design. In the literature, the PID controller has proved its effectiveness in many industrial applications, but determining its parameters remains one of the challenges in control theory field. The novelty of the work resides in the design and experimental implementation of a two-level boost DC-DC converter controlled by a PID controller for photovoltaic (PV) maximum power extraction. Purpose. Analysis and control of the two-level boost topology with renewable energy source and design of the PID controller parameters using simple and accurate method. Methods. PID coefficients are optimized using Coefficient Diagram Method (CDM) in the MATLAB environment. Results. A mathematical model of a two-level boost converter with PID controller and PV energy source was developed and analyzed. The model allows to design the controller parameters of the proposed system. Practical value. A prototype steered by the proposed CDM-PID controller was tested using an Arduino embedded board. A comparison between the simulation results and the experimental one is presented. The obtained results illustrate that the experimental results match the simulation closely, and the proposed CDM-PID controller provides a fast and precise results.","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"41 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140518056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Maximizing solar photovoltaic system efficiency by multivariate linear regression based maximum power point tracking using machine learning 利用机器学习,通过基于多元线性回归的最大功率点跟踪,实现太阳能光伏系统效率最大化
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.10
©. V. Paquianadin, K. N. Sam, G. Koperundevi, V. Paquianadin, Research Scholar
Introduction. In recent times, there has been a growing popularity of photovoltaic (PV) systems, primarily due to their numerous advantages in the field of renewable energy. One crucial and challenging task in PV systems is tracking the maximum power point (MPP), which is essential for enhancing their efficiency. Aim. PV systems face two main challenges. Firstly, they exhibit low efficiency in generating electric power, particularly in situations of low irradiation. Secondly, there is a strong connection between the power output of solar arrays and the constantly changing weather conditions. This interdependence can lead to load mismatch, where the maximum power is not effectively extracted and delivered to the load. This problem is commonly referred to as the maximum power point tracking (MPPT) problem various control methods for MPPT have been suggested to optimize the peak power output and overall generation efficiency of PV systems. Methodology. This article presents a novel approach to maximize the efficiency of solar PV systems by tracking the MPP and dynamic response of the system is investigated. Originality. The technique involves a multivariate linear regression (MLR) machine learning algorithm to predict the MPP for any value of irradiance level and temperature, based on data collected from the solar PV generator specifications. This information is then used to calculate the duty ratio for the boost converter. Results. MATLAB/Simulink simulations and experimental results demonstrate that this approach consistently achieves a mean efficiency of over 96 % in the steady-state operation of the PV system, even under variable irradiance level and temperature. Practical value. The improved efficiency of 96 % of the proposed MLR based MPP in the steady-state operation extracting maximum from PV system, adds more value. The same is evidently proved by the hardware results.
导言。近来,光伏(PV)系统越来越受欢迎,这主要是由于其在可再生能源领域具有众多优势。跟踪最大功率点 (MPP) 是光伏系统中一项至关重要且极具挑战性的任务,对于提高系统效率至关重要。目标光伏系统面临两大挑战。首先,它们的发电效率较低,尤其是在辐照度较低的情况下。其次,太阳能电池阵列的功率输出与不断变化的天气条件之间存在密切联系。这种相互依存的关系会导致负载不匹配,即不能有效地提取最大功率并将其输送给负载。这一问题通常被称为最大功率点跟踪(MPPT)问题,人们提出了各种 MPPT 控制方法,以优化光伏系统的峰值功率输出和整体发电效率。方法。本文提出了一种新方法,通过跟踪最大功率点来最大限度地提高太阳能光伏系统的效率,并对系统的动态响应进行了研究。独创性。该技术采用多元线性回归(MLR)机器学习算法,根据从太阳能光伏发电机规格中收集的数据,预测任何辐照度和温度值的 MPP。然后利用这些信息计算升压转换器的占空比。结果。MATLAB/Simulink 仿真和实验结果表明,即使在辐照度和温度可变的情况下,这种方法也能使光伏系统在稳态运行时的平均效率达到 96% 以上。实用价值。所提出的基于 MLR 的 MPP 在稳态运行中的效率提高了 96%,从光伏系统中提取了最大值,这增加了更多价值。硬件结果也证明了这一点。
{"title":"Maximizing solar photovoltaic system efficiency by multivariate linear regression based maximum power point tracking using machine learning","authors":"©. V. Paquianadin, K. N. Sam, G. Koperundevi, V. Paquianadin, Research Scholar","doi":"10.20998/2074-272x.2024.1.10","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.10","url":null,"abstract":"Introduction. In recent times, there has been a growing popularity of photovoltaic (PV) systems, primarily due to their numerous advantages in the field of renewable energy. One crucial and challenging task in PV systems is tracking the maximum power point (MPP), which is essential for enhancing their efficiency. Aim. PV systems face two main challenges. Firstly, they exhibit low efficiency in generating electric power, particularly in situations of low irradiation. Secondly, there is a strong connection between the power output of solar arrays and the constantly changing weather conditions. This interdependence can lead to load mismatch, where the maximum power is not effectively extracted and delivered to the load. This problem is commonly referred to as the maximum power point tracking (MPPT) problem various control methods for MPPT have been suggested to optimize the peak power output and overall generation efficiency of PV systems. Methodology. This article presents a novel approach to maximize the efficiency of solar PV systems by tracking the MPP and dynamic response of the system is investigated. Originality. The technique involves a multivariate linear regression (MLR) machine learning algorithm to predict the MPP for any value of irradiance level and temperature, based on data collected from the solar PV generator specifications. This information is then used to calculate the duty ratio for the boost converter. Results. MATLAB/Simulink simulations and experimental results demonstrate that this approach consistently achieves a mean efficiency of over 96 % in the steady-state operation of the PV system, even under variable irradiance level and temperature. Practical value. The improved efficiency of 96 % of the proposed MLR based MPP in the steady-state operation extracting maximum from PV system, adds more value. The same is evidently proved by the hardware results.","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"27 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140516695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A generalized physical principle of development of plasma channel of a high-voltage pulse spark discharge in a dielectric 电介质中高压脉冲火花放电等离子体通道发展的一般物理原理
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.05
M. I. Baranov
Goal. Development of the generalized physical principle of development of plasma channel of a high-voltage electrical pulse spark discharge in the homogeneous dielectric of the different aggregate state. Methodology. Basis of physical optics, theoretical electrical engineering, electrophysics bases of technique of high-voltage and large pulse currents, bases of high-voltage pulse technique and measuring technique. Results. Development of physical principle of development of plasma channel of an electric pulse spark discharge is executed in a homogeneous gas dielectric on the applied example of the use in calculations and experiments of the double-electrode discharge system (DEDS) with a long air interval, testing action of standard interconnect аperiodic pulse of high-voltage of temporal shape of Tm/Тd≈200 μs/1990 μs of positive polarity. The generalized formula is got for the calculation of total length of lc of the real way of development of an pulse spark discharge in an air dielectric, which allowed to formulate the offered physical principle in the following kind: «The plasma channel of an pulse spark discharge in a gas dielectric spreads from one of its points to other after a way length of lc, providing the least falling on it of electric voltage of Uc». It is shown that this principle in the first approaching can be applied and to the homogeneous liquid and hard dielectrics. Comparison of the developed physical principle of distribution of plasma channel of an electrical spark discharge is executed in a dielectrical environment with fundamental Fermat physical principle (a law) for distribution of light in an optically transparent environment, which specifies on mathematical likeness and closeness on destiny of these physical principles. Calculation estimations of falling of electric voltage of Uc on total length of lc of the real zigzag way of development in the air dielectric of DEDS a «edge-plane» with the least length of its discharge interval of lmin=1,5 m is presented, that a value Uc does not exceed 9 % from the experimental level of aggressive voltage of Umd≈611,6 кV in this DEDS for the аperiodic pulse of voltage of Tm/Тd≈200 μs/1990 μs. It is set that the estimated time of td advancement of leader channel of electric pulse discharge in air DEDS (lmin=1,5 m) on its real way total length of lc≈1,53 m makes td≈15,3 μs, and experimental duration of cut of Tdc of the indicated аperiodic impulse of voltage utilized in experiments, characterizing time of short circuit by the plasma channel of discharge of air interval in DEDS, appears equal Тdc≈td≈17 μs. Originality. The generalized physical principle of development of plasma channel of a high-voltage electrical pulse spark discharge is first developed in the homogeneous dielectric of the different aggregate state. Practical value. Application in electrical engineering practice and high-voltage pulse technique of the offered principle of distribution in the dielectrics of plasma channe
目标研究高压脉冲火花放电在不同聚集状态的均质电介质中形成等离子体通道的一般物理原理。研究方法。物理光学基础、理论电气工程、高压大脉冲电流技术的电物理学基础、高压脉冲技术基础和测量技术。成果。在均质气体电介质中发展电脉冲火花放电等离子体通道的物理原理,是在长空气间隔的双电极放电系统(DEDS)的计算和实验中,在正极性 Tm/Тd≈200 μs/1990 μs 时形的标准互联а周期高压脉冲的测试作用的应用实例中实现的。计算空气电介质中脉冲火花放电实际发展过程的总长度 lc 的通用公式可用来表述以下物理原理:"气体电介质中脉冲火花放电的等离子体通道在经过长度为 lc 的过程后从其一点向另一点扩散,并在此过程中提供最小的 Uc 电压"。实验表明,这一原理首先适用于均匀的液体和硬电介质。将所开发的电火花放电等离子体通道分布物理原理与光学透明环境中光分布的费马基本物理原理(定律)进行了比较,这说明了这些物理原理在数学上的相似性和接近性。在 DEDS 空气电介质的 "边缘平面 "中,放电间隔的最小长度为 lmin=1.5 m、5 m,Uc 值与该 DEDS 在 Tm/Тd≈200 μs/1990 μs 的а周期脉冲电压下的侵蚀电压 Umd≈611,6 кV 的实验水平相比不超过 9%。根据设定,在实际总长度为 lc≈1,53 m 的空气 DEDS(lmin=1,5 m)中,电脉冲放电引线通道的估计前进时间 td 为 td≈15,3 μs、而实验中使用的 а 周期脉冲电压的 Tdc 切断时间,即 DEDS 中空气间隔放电等离子体通道的短路时间,等于 Тdc≈td≈17 μs。独创性。首次在不同聚集状态的均质电介质中提出了高压电脉冲火花放电等离子体通道发展的一般物理原理。实用价值。在电气工程实践和高压脉冲技术中应用所提供的脉冲火花放电等离子体通道电介质分布原理,将有助于开发新的和完善现有的计算机设计方法,对不同高压电力工程和电物理设备的气体、液体和硬绝缘中的放电过程进行设计,以提高其运行的可靠性。
{"title":"A generalized physical principle of development of plasma channel of a high-voltage pulse spark discharge in a dielectric","authors":"M. I. Baranov","doi":"10.20998/2074-272x.2024.1.05","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.05","url":null,"abstract":"Goal. Development of the generalized physical principle of development of plasma channel of a high-voltage electrical pulse spark discharge in the homogeneous dielectric of the different aggregate state. Methodology. Basis of physical optics, theoretical electrical engineering, electrophysics bases of technique of high-voltage and large pulse currents, bases of high-voltage pulse technique and measuring technique. Results. Development of physical principle of development of plasma channel of an electric pulse spark discharge is executed in a homogeneous gas dielectric on the applied example of the use in calculations and experiments of the double-electrode discharge system (DEDS) with a long air interval, testing action of standard interconnect аperiodic pulse of high-voltage of temporal shape of Tm/Тd≈200 μs/1990 μs of positive polarity. The generalized formula is got for the calculation of total length of lc of the real way of development of an pulse spark discharge in an air dielectric, which allowed to formulate the offered physical principle in the following kind: «The plasma channel of an pulse spark discharge in a gas dielectric spreads from one of its points to other after a way length of lc, providing the least falling on it of electric voltage of Uc». It is shown that this principle in the first approaching can be applied and to the homogeneous liquid and hard dielectrics. Comparison of the developed physical principle of distribution of plasma channel of an electrical spark discharge is executed in a dielectrical environment with fundamental Fermat physical principle (a law) for distribution of light in an optically transparent environment, which specifies on mathematical likeness and closeness on destiny of these physical principles. Calculation estimations of falling of electric voltage of Uc on total length of lc of the real zigzag way of development in the air dielectric of DEDS a «edge-plane» with the least length of its discharge interval of lmin=1,5 m is presented, that a value Uc does not exceed 9 % from the experimental level of aggressive voltage of Umd≈611,6 кV in this DEDS for the аperiodic pulse of voltage of Tm/Тd≈200 μs/1990 μs. It is set that the estimated time of td advancement of leader channel of electric pulse discharge in air DEDS (lmin=1,5 m) on its real way total length of lc≈1,53 m makes td≈15,3 μs, and experimental duration of cut of Tdc of the indicated аperiodic impulse of voltage utilized in experiments, characterizing time of short circuit by the plasma channel of discharge of air interval in DEDS, appears equal Тdc≈td≈17 μs. Originality. The generalized physical principle of development of plasma channel of a high-voltage electrical pulse spark discharge is first developed in the homogeneous dielectric of the different aggregate state. Practical value. Application in electrical engineering practice and high-voltage pulse technique of the offered principle of distribution in the dielectrics of plasma channe","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"29 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140518670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of the maximum mechanical stresses in the insulating material around a defect with a high dielectric permittivity in an electrostatic field 测定静电场中高介电常数缺陷周围绝缘材料的最大机械应力
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.09
O. О. Palchykov
Introduction. All insulating macrohomogeneous solid materials change shape under the influence of an electric field. Problem. The presence of minor defects changes the distribution of an electric field and causes a significant concentration of mechanical stresses in a given section of the material, which, under certain circumstances, can cause partial or complete destruction of this material. Goal. The purpose of the work is to determine maximum mechanical stresses according to the von Mises criterion in insulating materials around defects with ionized air and water in an electrostatic field. Also, to analyze the influence of the following parameters on the indicated stresses: the location of the defect, the orientation angle of the semi-major axis of the defect cross-section, the ratio of semi-major and semi-minor axes, elastic and dielectric properties of the insulating material and the defect. Methodology. The study is based on the interrelated equations of electrostatics and structural mechanics for an isotropic piecewise homogeneous medium. The solution of these equations is obtained by the finite element method. Results. Graphs of dependences of maximum mechanical stresses on the ratio of semi-major and semi-minor axes of the ellipsoidal cross-section of the defect have been obtained. The minimum ratio of the greatest stresses in the insulating materials around the surface cracks and pores for ionized air has been 9.3 times for the maximum ratio of major and minor semi-axes of the cross-section of the defect considered in the work, which is 10. For a water defect, the similar ratio has been 2...5.6 times, increasing when the relative dielectric permittivity of the insulating material changes from 7 to 2. When Young’s modulus of the insulating material increases from 1 MPa to 100 GPa, the angles of the inclination of the linearized dependences of maximum mechanical stresses around bounded pores with ionized air (water) to the axis of the ratio of major and minor semi-axes of the defect cross-section have been increased by 35.9° (58.0°) and 18.6° (20.1°) at orientations of major semi-axes at angles of 0° and 45°, respectively. Originality. The numerical-field mathematical two-dimensional model has been developed for the first time, which consists of sequentially solved equations of electrostatics and structural mechanics, for the determination of the distribution of mechanical stresses in an insulating material with a liquid or gaseous defect. It has been established for the first time that the ratio of the elastic properties of the insulating material and the defect determines the angle of the inclination of the linearized dependence of the maximum mechanical stress to the axis of the ratio of major and minor semi-axes of the defect cross-section. Practical value. The types of defects that contribute to the aging of insulation materials under the combined action of an electric field and a stress field to the greatest extent have been establi
引言所有绝缘的宏观均质固体材料在电场作用下都会改变形状。问题微小缺陷的存在会改变电场的分布,并在材料的特定部分造成机械应力的显著集中,在某些情况下会导致材料的部分或完全破坏。目标这项工作的目的是根据冯-米塞斯准则确定静电场中电离空气和水在缺陷周围绝缘材料中的最大机械应力。此外,还要分析以下参数对所示应力的影响:缺陷的位置、缺陷横截面半主轴的方向角、半主轴和半次要轴的比率、绝缘材料和缺陷的弹性和介电特性。研究方法研究基于各向同性片状均质介质的静电和结构力学相互关联的方程。这些方程的解是通过有限元法获得的。结果。获得了最大机械应力与缺陷椭圆截面半主轴和半次要轴比率的关系图。对于电离空气,表面裂缝和孔隙周围绝缘材料中最大应力的最小比率为 9.3 倍,而工作中考虑的缺陷横截面半主半次轴的最大比率为 10。对于水缺陷,类似比率为 2...5.6 倍,当绝缘材料的相对介电常数从 7 变为 2 时,比率会增加。当绝缘材料的杨氏模量从 1 MPa 增加到 100 GPa 时,电离空气(水)有界孔周围的最大机械应力线性化依赖关系与缺陷横截面主半轴和次半轴之比轴线的倾角在主半轴方向为 0° 和 45° 时分别增加了 35.9° (58.0°) 和 18.6° (20.1°)。独创性首次建立了由连续求解的静电方程和结构力学方程组成的二维数场数学模型,用于确定带有液态或气态缺陷的绝缘材料中的机械应力分布。该模型首次确定了绝缘材料和缺陷的弹性特性比决定了最大机械应力线性化依赖于缺陷横截面主半轴和次半轴之比轴线的倾斜角度。实用价值。在电场和应力场的共同作用下,导致绝缘材料老化程度最大的缺陷类型已经确定。
{"title":"Determination of the maximum mechanical stresses in the insulating material around a defect with a high dielectric permittivity in an electrostatic field","authors":"O. О. Palchykov","doi":"10.20998/2074-272x.2024.1.09","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.09","url":null,"abstract":"Introduction. All insulating macrohomogeneous solid materials change shape under the influence of an electric field. Problem. The presence of minor defects changes the distribution of an electric field and causes a significant concentration of mechanical stresses in a given section of the material, which, under certain circumstances, can cause partial or complete destruction of this material. Goal. The purpose of the work is to determine maximum mechanical stresses according to the von Mises criterion in insulating materials around defects with ionized air and water in an electrostatic field. Also, to analyze the influence of the following parameters on the indicated stresses: the location of the defect, the orientation angle of the semi-major axis of the defect cross-section, the ratio of semi-major and semi-minor axes, elastic and dielectric properties of the insulating material and the defect. Methodology. The study is based on the interrelated equations of electrostatics and structural mechanics for an isotropic piecewise homogeneous medium. The solution of these equations is obtained by the finite element method. Results. Graphs of dependences of maximum mechanical stresses on the ratio of semi-major and semi-minor axes of the ellipsoidal cross-section of the defect have been obtained. The minimum ratio of the greatest stresses in the insulating materials around the surface cracks and pores for ionized air has been 9.3 times for the maximum ratio of major and minor semi-axes of the cross-section of the defect considered in the work, which is 10. For a water defect, the similar ratio has been 2...5.6 times, increasing when the relative dielectric permittivity of the insulating material changes from 7 to 2. When Young’s modulus of the insulating material increases from 1 MPa to 100 GPa, the angles of the inclination of the linearized dependences of maximum mechanical stresses around bounded pores with ionized air (water) to the axis of the ratio of major and minor semi-axes of the defect cross-section have been increased by 35.9° (58.0°) and 18.6° (20.1°) at orientations of major semi-axes at angles of 0° and 45°, respectively. Originality. The numerical-field mathematical two-dimensional model has been developed for the first time, which consists of sequentially solved equations of electrostatics and structural mechanics, for the determination of the distribution of mechanical stresses in an insulating material with a liquid or gaseous defect. It has been established for the first time that the ratio of the elastic properties of the insulating material and the defect determines the angle of the inclination of the linearized dependence of the maximum mechanical stress to the axis of the ratio of major and minor semi-axes of the defect cross-section. Practical value. The types of defects that contribute to the aging of insulation materials under the combined action of an electric field and a stress field to the greatest extent have been establi","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"37 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140523048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of suitable converter for the implementation of drive system in solar photovoltaic panels 分析适用于太阳能光伏板驱动系统的转换器
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.03
G. Themozhi, K. Srinivasan, T. Arun Srinivas, A. Prabha
Introduction. Photovoltaic (PV) systems gained immense attraction in the recent years since it produces electricity without causing environmental pollution through direct conversion of solar irradiance into electricity. Solar PV panels produce DC power. The magnitude of this DC power varies with temperature and irradiance of the sun rays. The DC supply from solar panels can be regulated using DC-DC converter and then can further be converted into the desired AC voltage by means of a voltage source inverter before being fed to an induction motor (IM). The speed and torque of an IM, fed from PV arrays, can vary due to the variation in the output power of the panels. Goal of this work is to improve the dynamic performance and reduce the torque ripple of Cuk converter-inverter fed IM drive system. The novelty of the current work proposes interleaved Cuk converter between solar PV DC source and the inverter. Purpose. To provide continuous current using an interleaved Cuk converter to the IM drive and in turn to reduce the torque ripple in IM. Methodology. Introduced an interleaved Cuk converter which is a blend of Cuk converters connected in parallel with each other between solar PV arrays and IM drive system. Originality. Simulation results are obtained for Cuk converter and interleaved Cuk converter fed IM drive by means of MATLAB. The hardware setup for the same IM systems is developed. Practical value. Simulation and hardware results are coincided with each other and it is subject from the simulation and hardware results that the interleaved Cuk converter-inverter fed IM system produced results superior than the Cuk converter inverter fed IM drive system.
导言。光伏(PV)系统通过将太阳辐照度直接转化为电能,在不造成环境污染的情况下生产电力,因此近年来获得了巨大的吸引力。太阳能光伏板产生直流电。直流电的大小随温度和太阳光辐照度的变化而变化。太阳能电池板产生的直流电可以通过直流-直流转换器进行调节,然后通过电压源逆变器进一步转换成所需的交流电压,再输送给感应电机(IM)。由光伏阵列馈电的感应电机的速度和扭矩会因电池板输出功率的变化而变化。这项工作的目标是改善 Cuk 转换器-逆变器馈入感应电机驱动系统的动态性能并降低扭矩纹波。当前工作的新颖之处在于在太阳能光伏直流电源和逆变器之间采用交错式 Cuk 转换器。目的是使用交错 Cuk 转换器为 IM 驱动器提供连续电流,进而降低 IM 的扭矩纹波。方法。引入交错 Cuk 转换器,它是太阳能光伏阵列和 IM 驱动系统之间相互并联的 Cuk 转换器的混合体。原创性。通过 MATLAB 获得了 Cuk 转换器和交错 Cuk 转换器馈入 IM 驱动器的仿真结果。为相同的 IM 系统开发了硬件设置。实用价值。仿真和硬件结果是一致的,而且从仿真和硬件结果可以看出,交错 Cuk 转换器-逆变器馈电 IM 系统的结果优于 Cuk 转换器-逆变器馈电 IM 驱动系统。
{"title":"Analysis of suitable converter for the implementation of drive system in solar photovoltaic panels","authors":"G. Themozhi, K. Srinivasan, T. Arun Srinivas, A. Prabha","doi":"10.20998/2074-272x.2024.1.03","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.03","url":null,"abstract":"Introduction. Photovoltaic (PV) systems gained immense attraction in the recent years since it produces electricity without causing environmental pollution through direct conversion of solar irradiance into electricity. Solar PV panels produce DC power. The magnitude of this DC power varies with temperature and irradiance of the sun rays. The DC supply from solar panels can be regulated using DC-DC converter and then can further be converted into the desired AC voltage by means of a voltage source inverter before being fed to an induction motor (IM). The speed and torque of an IM, fed from PV arrays, can vary due to the variation in the output power of the panels. Goal of this work is to improve the dynamic performance and reduce the torque ripple of Cuk converter-inverter fed IM drive system. The novelty of the current work proposes interleaved Cuk converter between solar PV DC source and the inverter. Purpose. To provide continuous current using an interleaved Cuk converter to the IM drive and in turn to reduce the torque ripple in IM. Methodology. Introduced an interleaved Cuk converter which is a blend of Cuk converters connected in parallel with each other between solar PV arrays and IM drive system. Originality. Simulation results are obtained for Cuk converter and interleaved Cuk converter fed IM drive by means of MATLAB. The hardware setup for the same IM systems is developed. Practical value. Simulation and hardware results are coincided with each other and it is subject from the simulation and hardware results that the interleaved Cuk converter-inverter fed IM system produced results superior than the Cuk converter inverter fed IM drive system.","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"154 3-4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140516871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computer simulation of operation plant effective modes for water disinfection by electrical discharges in gas bubbles 通过气泡放电对水进行消毒的运行设备有效模式的计算机模拟
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.06
M. I. Boiko, K. S. Tatkova
Purpose. Determination by means of computer simulation of the most efficient modes of operation of the installation for water disinfection using discharges in gas bubbles, in which (modes) the amplitude of voltage pulses at the processing unit and on the layer of treated water is not less than the voltage amplitude immediately after the switching discharger. Methodology. To achieve this goal, we used computer simulation using Micro-Cap 10. We used two different electrical circuits that simulate the operation of the experimental setup in two different modes: in a mode with a restoring electrical strength of the discharge gap in the gas bubble between two adjacent voltage pulses on the discharge node and in the mode without restoring this dielectric strength. In computer simulation, we varied the following factors: the maximum simulation step, inductances, capacitances, active resistances, wave resistance of a long line, and the delay time for the operation of a spark gap simulating a discharge gap in a gas bubble. Results. Computer modeling has shown that in order to increase the voltage amplitude at the treatment unit and on the layer of treated water, it is necessary to reduce the load capacitance – the capacitance of the water layer in the treatment unit to 10 pF or less, to increase the active resistance of the water layer to 500 W or more. An important factor for increasing the voltage and electric field strength in the discharge unit and, consequently, for increasing the efficiency of treated water disinfection is the discharge delay time in gas bubbles. The most rational delay time for the operation of the arrester, which is the gap in the gas bubble inside the water, under the conditions considered by us is 4–5 ns. It is with this delay time that the amplitude of voltage pulses at the node of disinfecting water treatment and on the layer of treated water is maximum, all other things being equal. Furthermore, with such a delay time this amplitude of voltage pulses significantly exceeds the voltage amplitude directly after the main high-voltage discharger, switching energy from the high-voltage capacitive storage to the processing unit through a long line filled with water. Originality. Using computer simulation, we have shown the possibility of increasing the voltage at the discharge unit of the experimental setup by 35 % without increasing the voltage of the power source. This provides a higher efficiency of microbiological disinfection of water by nanosecond discharges in gas bubbles and lower specific energy consumption. Practical value. The obtained results of computer simulation confirm the prospect of industrial application of installations using nanosecond discharges for disinfection and purification of wastewater, swimming pools and post-treatment of tap water.
目的通过计算机模拟确定利用气泡放电对水进行消毒的设备的最有效运行模式,在这些(模式)中,处理装置和处理水层上的电压脉冲振幅不小于切换放电装置后立即产生的电压振幅。方法为了实现这一目标,我们使用 Micro-Cap 10 进行了计算机模拟。我们使用了两种不同的电路来模拟实验装置在两种不同模式下的运行:在放电节点上两个相邻电压脉冲之间气体气泡放电间隙的电强度恢复模式和不恢复这种介电强度的模式。在计算机模拟中,我们改变了以下因素:最大模拟步长、电感、电容、有源电阻、长线波阻抗,以及模拟气泡放电间隙的火花间隙运行的延迟时间。结果。计算机模型显示,为了提高处理装置和处理水层上的电压幅值,必须将负载电容--处理装置中水层的电容降低到 10 pF 或更低,将水层的有源电阻提高到 500 W 或更高。提高放电装置中的电压和电场强度,进而提高处理水消毒效率的一个重要因素是气泡中的放电延迟时间。在我们考虑的条件下,避雷器(即水中气泡的间隙)运行的最合理延迟时间为 4-5 毫微秒。在其他条件不变的情况下,正是在这一延迟时间内,消毒水处理节点和处理水层上的电压脉冲幅值达到最大。此外,在这样的延迟时间内,电压脉冲的幅值大大超过了直接位于主高压放电管之后的电压幅值,通过一条充满水的长线将能量从高压电容储能器转换到处理装置。独创性通过计算机模拟,我们证明了在不增加电源电压的情况下,将实验装置放电单元的电压提高 35% 的可能性。这样,通过纳秒气泡放电对水进行微生物消毒的效率更高,能耗更低。实用价值。计算机模拟的结果证实了利用纳秒放电装置对废水、游泳池和自来水后处理进行消毒和净化的工业应用前景。
{"title":"Computer simulation of operation plant effective modes for water disinfection by electrical discharges in gas bubbles","authors":"M. I. Boiko, K. S. Tatkova","doi":"10.20998/2074-272x.2024.1.06","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.06","url":null,"abstract":"Purpose. Determination by means of computer simulation of the most efficient modes of operation of the installation for water disinfection using discharges in gas bubbles, in which (modes) the amplitude of voltage pulses at the processing unit and on the layer of treated water is not less than the voltage amplitude immediately after the switching discharger. Methodology. To achieve this goal, we used computer simulation using Micro-Cap 10. We used two different electrical circuits that simulate the operation of the experimental setup in two different modes: in a mode with a restoring electrical strength of the discharge gap in the gas bubble between two adjacent voltage pulses on the discharge node and in the mode without restoring this dielectric strength. In computer simulation, we varied the following factors: the maximum simulation step, inductances, capacitances, active resistances, wave resistance of a long line, and the delay time for the operation of a spark gap simulating a discharge gap in a gas bubble. Results. Computer modeling has shown that in order to increase the voltage amplitude at the treatment unit and on the layer of treated water, it is necessary to reduce the load capacitance – the capacitance of the water layer in the treatment unit to 10 pF or less, to increase the active resistance of the water layer to 500 W or more. An important factor for increasing the voltage and electric field strength in the discharge unit and, consequently, for increasing the efficiency of treated water disinfection is the discharge delay time in gas bubbles. The most rational delay time for the operation of the arrester, which is the gap in the gas bubble inside the water, under the conditions considered by us is 4–5 ns. It is with this delay time that the amplitude of voltage pulses at the node of disinfecting water treatment and on the layer of treated water is maximum, all other things being equal. Furthermore, with such a delay time this amplitude of voltage pulses significantly exceeds the voltage amplitude directly after the main high-voltage discharger, switching energy from the high-voltage capacitive storage to the processing unit through a long line filled with water. Originality. Using computer simulation, we have shown the possibility of increasing the voltage at the discharge unit of the experimental setup by 35 % without increasing the voltage of the power source. This provides a higher efficiency of microbiological disinfection of water by nanosecond discharges in gas bubbles and lower specific energy consumption. Practical value. The obtained results of computer simulation confirm the prospect of industrial application of installations using nanosecond discharges for disinfection and purification of wastewater, swimming pools and post-treatment of tap water.","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"17 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140517598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method for prediction and control by uncertain microsatellite magnetic cleanliness based on calculation and compensation magnetic field spatial harmonics 基于磁场空间谐波计算和补偿的不确定微卫星磁洁净度预测和控制方法
Pub Date : 2024-01-01 DOI: 10.20998/2074-272x.2024.1.04
B. Kuznetsov, T. Nikitina, I. Bovdui, K. Chunikhin, V. Kolomiets, B. Kobylianskyi
Aim. Development of method for prediction and control the microsatellite magnetic cleanliness taking into account the uncertainties of the magnetic characteristics of the microsatellite, based on calculation the magnetic field spatial spherical harmonics in the area of the onboard magnetometer installation and using compensating multipoles. Methodology. Spatial spherical harmonics of microsatellite magnetic field in the area of the onboard magnetometer installation calculated as solution of nonlinear minimax optimization problem based on near field measurements for prediction far spacecraft magnetic field magnitude. Nonlinear objective function calculated as the weighted sum of squared residuals between the measured and predicted magnetic field. Values of the compensating dipoles, quadrupoles and octupoles and coordinates of them placement inside the spaceship for compensation of the dipoles, quadrupoles and octupoles components of the microsatellite initial magnetic field also calculated as solution of nonlinear minimax optimization problem. Both solutions of this nonlinear minimax optimization problems calculated based on particle swarm nonlinear optimization algorithms. Results. Results of prediction spacecraft far magnetic field magnitude based on spacecraft spatial spherical harmonics of the magnetic field using near field measurements and compensation of the dipoles, quadrupoles and octupoles components of the initial magnetic field with consideration of spacecraft magnetic characteristics uncertainty for ensuring the microsatellite magnetic cleanliness. Originality. The method for prediction and control by spacecraft magnetic cleanliness based on calculation spatial spherical harmonics of the magnetic field in the area of the onboard magnetometer installation using compensation of the dipoles, quadrupoles and octupoles components of the initial magnetic field with consideration of magnetic characteristics uncertainty is developed. Practical value. The important practical problem of ensuring the magnetic cleanliness of the «Sich-2» microsatellite family based on the spatial spherical harmonics of the magnetic field model using the compensation of the dipole, quadrupole and octupole components of the output magnetic field of the sensor for the kinetic parameters of the neutral component of the space plasma at the point of installation of the on-board magnetometer LEMI-016 by setting the compensating dipole, quadrupole and octupole with consideration of spacecraft magnetic characteristics uncertainty solved.
目的。在计算星载磁强计安装区域的磁场空间球面谐波和使用补偿多极的基础上,考虑到微型卫星磁特性的不确定性,开发预测和控制微型卫星磁洁净度的方法。方法。计算星载磁强计安装区域内微型卫星磁场的空间球形谐波,作为基于近场测量的非线性最小优化问题的解决方案,以预测航天器远场磁场的大小。非线性目标函数计算为测量磁场与预测磁场之间的加权残差平方和。补偿偶极子、四极子和八极子的值以及它们在飞船内的位置坐标也作为非线性最小优化问题的解计算出来,用于补偿微型卫星初始磁场的偶极子、四极子和八极子分量。该非线性最小优化问题的两个解决方案都是基于粒子群非线性优化算法计算得出的。结果利用近场测量和补偿初始磁场的偶极、四极和八极分量,并考虑航天器磁特性的不确定性,根据航天器磁场的空间球谐波预测航天器远磁场大小,以确保微卫星磁洁净度的结果。独创性考虑到磁特性的不确定性,利用初始磁场的偶极子、四极子和八极子分量补偿计算机载磁强计安装区域的磁场空间球面谐波,开发了预测和控制航天器磁洁净度的方法。实用价值。在考虑航天器磁特性不确定性的情况下,通过设置补偿偶极子、四极子和八极子,利用传感器输出磁场的偶极子、四极子和八极子分量补偿 LEMI-016 星载磁强计安装点空间等离子体中性分量动力学参数的磁场空间球形谐波模型,解决了确保 "Sich-2 "微卫星系列磁洁净度的重要实际问题。
{"title":"Method for prediction and control by uncertain microsatellite magnetic cleanliness based on calculation and compensation magnetic field spatial harmonics","authors":"B. Kuznetsov, T. Nikitina, I. Bovdui, K. Chunikhin, V. Kolomiets, B. Kobylianskyi","doi":"10.20998/2074-272x.2024.1.04","DOIUrl":"https://doi.org/10.20998/2074-272x.2024.1.04","url":null,"abstract":"Aim. Development of method for prediction and control the microsatellite magnetic cleanliness taking into account the uncertainties of the magnetic characteristics of the microsatellite, based on calculation the magnetic field spatial spherical harmonics in the area of the onboard magnetometer installation and using compensating multipoles. Methodology. Spatial spherical harmonics of microsatellite magnetic field in the area of the onboard magnetometer installation calculated as solution of nonlinear minimax optimization problem based on near field measurements for prediction far spacecraft magnetic field magnitude. Nonlinear objective function calculated as the weighted sum of squared residuals between the measured and predicted magnetic field. Values of the compensating dipoles, quadrupoles and octupoles and coordinates of them placement inside the spaceship for compensation of the dipoles, quadrupoles and octupoles components of the microsatellite initial magnetic field also calculated as solution of nonlinear minimax optimization problem. Both solutions of this nonlinear minimax optimization problems calculated based on particle swarm nonlinear optimization algorithms. Results. Results of prediction spacecraft far magnetic field magnitude based on spacecraft spatial spherical harmonics of the magnetic field using near field measurements and compensation of the dipoles, quadrupoles and octupoles components of the initial magnetic field with consideration of spacecraft magnetic characteristics uncertainty for ensuring the microsatellite magnetic cleanliness. Originality. The method for prediction and control by spacecraft magnetic cleanliness based on calculation spatial spherical harmonics of the magnetic field in the area of the onboard magnetometer installation using compensation of the dipoles, quadrupoles and octupoles components of the initial magnetic field with consideration of magnetic characteristics uncertainty is developed. Practical value. The important practical problem of ensuring the magnetic cleanliness of the «Sich-2» microsatellite family based on the spatial spherical harmonics of the magnetic field model using the compensation of the dipole, quadrupole and octupole components of the output magnetic field of the sensor for the kinetic parameters of the neutral component of the space plasma at the point of installation of the on-board magnetometer LEMI-016 by setting the compensating dipole, quadrupole and octupole with consideration of spacecraft magnetic characteristics uncertainty solved.","PeriodicalId":170736,"journal":{"name":"Electrical Engineering & Electromechanics","volume":"26 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140518295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Electrical Engineering & Electromechanics
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1