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2022 23rd International Middle East Power Systems Conference (MEPCON)最新文献

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Model Predictive Control for Dual Active Bridge in fast Charging Application of Electric Vehicles 双有源桥在电动汽车快速充电中的模型预测控制
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021773
Mohamed A. Elkeiy, R. Kennel, A. Abdel-Khalik, Mohamed Abdelrahem
In this paper, a discrete-time model predictive control (MPC) of dual active bridge-based charging system has been deployed and compared to conventional PI controlled system highlighting strength of MPC over conventional PI control. The predictive control algorithm utilises the discrete nature of the full-bridges and predicts the future state of the system. The objective of the MPC is to reduce the cost function by selecting the switching states from a finite set of switching for the converters in the next sample period. Consequently, the corresponding switching state is used as the firing command to the converter. The MPC is applied to control the power flow between the two bridges with an isolation transformer in the middle. The proposed MPC for bi-directional DC-DC converter is simulated with MATLAB Simulink and shows that the amount of reactive power is reduced by avoiding the phase shift between the primary and secondary sides of the high frequency transformer and allows for power transfer at unity power factor. Finally, a performance comparison between MPC and PI control algorithm is performed.
本文提出了一种基于双有源桥式充电系统的离散时间模型预测控制(MPC),并与传统PI控制系统进行了比较,突出了MPC比传统PI控制的优势。预测控制算法利用全桥的离散特性,预测系统的未来状态。MPC的目标是通过在下一个采样周期从有限的开关集合中选择转换器的开关状态来减小成本函数。因此,相应的开关状态被用作对转换器的发射命令。MPC用于控制两桥之间的潮流,中间有一个隔离变压器。利用MATLAB Simulink对所提出的双向DC-DC变换器的MPC进行了仿真,结果表明,通过避免高频变压器主次侧的相移,可以减少无功功率,并允许在单位功率因数下进行功率传输。最后,对MPC控制算法和PI控制算法进行了性能比较。
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引用次数: 0
Optimize AVR system performance by using enhanced genetic algorithm 采用增强型遗传算法优化AVR系统性能
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021789
A. Abdelkhalek, M. Attia, Ammar Mohamed, N. Badra
Automatic voltage regulator (AVR) systems play an important role in adjusting the terminal voltage of synchronous generators. Proportional-Integral-Derivative (PID) and Proportional-Integral-Derivative-Acceleration (PIDA) are two types of controllers that are widely used on this issue. To achieve better performance, optimization techniques are used to obtain the best controller gains values that achieve minimum feedback error. However, most of optimization techniques utilized so far are computationally exhausting or suffer slow convergence. Thus, in this research, the Enhanced Genetic Algorithm (EGA) method is proposed to optimize AVR system with PID and PIDA controllers. EGA enforces local search ability using directed operators without loss of genetic divesity in order to achieve better performance. Simulation results and comparative step response analysis show that EGA outperforms other optimization techniques.
自动调压系统在同步发电机端电压调节中起着重要的作用。比例-积分-导数(PID)和比例-积分-导数-加速度(PIDA)是在这一问题上应用最广泛的两种控制器。为了获得更好的性能,使用优化技术来获得实现最小反馈误差的最佳控制器增益值。然而,目前使用的大多数优化技术都是计算消耗或收敛缓慢的。因此,在本研究中,提出了增强遗传算法(EGA)方法来优化PID和PIDA控制器的AVR系统。EGA在不损失遗传多样性的情况下,利用有向算子增强局部搜索能力,以获得更好的性能。仿真结果和阶跃响应对比分析表明,EGA算法优于其他优化方法。
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引用次数: 0
A Voltage-Doubler/Marx-Generator-Based Multi-Module High-Voltage Pulse Generator with High- Frequency Charger for Electrostatic Precipitators 一种基于倍压/马克斯发生器的多模块高压脉冲发生器及高频充电器,用于静电除尘器
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021744
Wessam E. Abdel-Azim, A. Elserougi, A. Hossam-Eldin
Due to the urgent demands for a clean environment, many up-to-date researches have focused on developing air cleaning systems. Recently, many studies have assured that the pulse energization-based electrostatic precipitator (ESP) is a good candidate for enhancing the removal efficiency of high-resistivity fractional particles, resulted from commercial and industrial applications. Consequently, this paper proposes a multi-module pulse power supply, in series-stacked version, fed from isolated high- frequency square-wave AC sources via utilizing multiple of ring transformers. Each module comprises of the voltage-doubler (VD)/marx-generator (MG) stages. In the presented approach, the two various output pulse types, namely, rectangular pulse and multilevel one, are proposed. The suggested approach is featured with its modular construction and its scalability for generating any desired voltages' values for pulse energization with a controllable repetition rate and an adjustable pulse width. The operational principles, along with design equations, have been illustrated for the presented scheme. A numerical comparison is carried out to show the merits of the suggested pulse generator compared to the other approaches in the literature. The findings of simulated case-study are used to validate the presented pulse generator.
由于人们对清洁环境的迫切需求,许多最新的研究都集中在开发空气净化系统上。近年来,随着商业和工业应用的发展,基于脉冲能量的静电除尘器(ESP)是提高高电阻率颗粒去除效率的良好选择。因此,本文提出了一种串联堆叠的多模块脉冲电源,利用多个环形变压器从隔离的高频方波交流源馈电。每个模块由电压倍增器(VD)/电压发生器(MG)级组成。在该方法中,提出了两种不同的输出脉冲类型,即矩形脉冲和多电平脉冲。所建议的方法具有模块化结构和可扩展性,可以产生任何所需的电压值,以可控的重复率和可调的脉冲宽度进行脉冲通电。对所提出的方案的工作原理以及设计方程进行了说明。数值比较表明,与文献中其他方法相比,所提出的脉冲发生器的优点。仿真研究的结果用于验证所提出的脉冲发生器。
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引用次数: 0
Frequency Control of Islanded Multi-Microgrids Under Different Disturbances 不同扰动下孤岛多微电网的频率控制
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021707
Basant Bahr, H. Keshta, Mahmoud N. Ali, M. Ebrahim
The intermittent nature of renewable energy sources, solar and wind, may affect the system dynamic performance and stability. Operation of an isolated hybrid micro-grid (HMG) system requires frequency regulating as well as the voltage. The frequency and power generation control in a power system is usually referred to as a load frequency control. In this paper, the biomass power plant is the main balancing mechanism of the proposed hybrid micro-grid. Speed governor of biomass power plant is implemented using both conventional proportional-integral- derivative (PID) and Proportional-Integral-Derivative-Acceleration (PIDA) based controllers to track system uncertainties and enhancing the performance of HMG. Atom search optimization (ASO) is applied to fine tune the proposed PID and PIDA controllers by minimizing the integral of time multiplied absolute error (ITAE). The proposed HMG and its controllers are applied and tested in the MATLAB/Simulink based simulation environment. In this paper, PID and the PIDA controller have been compared between them to notice the fluctuation behavior of frequency under various system uncertainties scenarios, it is concluded that the PIDA controller scheme provides more reliable system frequency than conventional PID controller.
太阳能和风能等可再生能源的间歇性可能会影响系统的动态性能和稳定性。隔离型混合微电网(HMG)系统的运行不仅需要电压调节,还需要频率调节。在电力系统中,频率和发电量的控制通常被称为负荷频率控制。本文将生物质发电厂作为混合微电网的主要平衡机制。采用传统的比例-积分-导数(PID)控制器和基于比例-积分-导数-加速度(PIDA)控制器实现生物质发电厂的调速,以跟踪系统的不确定性,提高HMG的性能。利用原子搜索优化(ASO)最小化时间乘绝对误差(ITAE)的积分,对PID和PIDA控制器进行微调。在基于MATLAB/Simulink的仿真环境中对所提出的HMG及其控制器进行了应用和测试。本文比较了PID和PIDA控制器在各种系统不确定性情况下的频率波动行为,得出PIDA控制器方案比传统PID控制器提供更可靠的系统频率。
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引用次数: 0
Review: Frequency Response Analysis For Transformer's Status Diagnoses 变压器状态诊断的频率响应分析
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021754
Salah Mahfouz, Mohamed K. Ei-Nemr, A. Abu‐Siada
Power and distribution transformers are the heart of the power network. It is the core of the transmission and distribution system. Non-destructive investigation of its health status, especially for mechanical deformations, is a vital operation to guarantee continuous and efficient operation. The frequency response analysis (FRA) is gaining wider acceptance as an accurate approach of detecting different types of premature faults, deflections, and unbalances. This paper presents an informative but concise review of the fundamental terminology, essential test techniques, and the results analysis approaches. Such a review is valuable for researchers and engineers. Furthermore, the paper navigates the most promising and critical research topics in transformer status diagnosis using FRA.
电力和配电变压器是电网的心脏。它是输配电系统的核心。对其健康状态进行无损检测,特别是对机械变形进行无损检测,是保证其连续高效运行的重要手段。频率响应分析(FRA)作为一种检测不同类型的过早故障、偏转和不平衡的准确方法,正得到越来越广泛的接受。本文对基本术语、基本测试技术和结果分析方法进行了翔实而简明的回顾。这样的回顾对研究人员和工程师是有价值的。在此基础上,提出了基于FRA的变压器状态诊断中最有前途和最关键的研究课题。
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引用次数: 0
A Droop-Based Frequency Controller for Parallel Operation of VSCs and SG in Isolated Microgrids 一种基于下垂的微电网VSCs和SG并联频率控制器
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021786
W. Hafez, K. Mahmoud, Abdelfatah Ali, M. Shaaban, P. Divshali, M. Lehtonen
Microgrids are a novel concept for modern power distribution networks that integrate renewable power sources and increase power control capabilities. This system's essential problem is controlling the frequency in island mode. Using the synchronous generator (SG) control approach, the microgrid frequency is more stable due to the inertial features of the SG. In this regard, this paper presents a control algorithm for voltage source converters (VSC)-based distributed generators (DGs), which emulates the principal behavior of synchronous machines and can support inertia to the grid and reduce frequency gradients considering the parallel operation of the SG. The controller is designed based on droop control theory, and a supervisory center controller is implemented to maintain system frequency close to a nominal value of the whole microgrid. The simulation results demonstrate that the system frequency is stabilized even in different and sudden load changes in the island mode where the microgrid is fed by multiple VSC units and a SG. The Simulink model of the system is designed using MATLAB Simulink Software.
微电网是集成可再生能源和提高电力控制能力的现代配电网络的一个新概念。该系统的核心问题是孤岛模式下的频率控制。采用同步发电机控制方法,由于同步发电机的惯性特性,微网频率更加稳定。在这方面,本文提出了一种基于电压源变换器(VSC)的分布式发电机(dg)的控制算法,该算法模拟了同步电机的主要行为,可以支持对电网的惯性,并考虑到SG的并联运行,降低了频率梯度。该控制器基于下垂控制理论设计,并实现了一个监控中心控制器,使系统频率保持在整个微电网的标称值附近。仿真结果表明,在由多个VSC单元和一个SG单元组成的孤岛模式下,即使在不同的突然负荷变化情况下,系统频率也能保持稳定。利用MATLAB Simulink软件设计了系统的Simulink模型。
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引用次数: 0
Optimal Day-Ahead Dispatch in Isolated AC/DC Microgrids Using Hunger Game Search Algorithm 基于饥饿游戏搜索算法的隔离交直流微电网日前调度优化
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021796
M. M. Ibrahim, W. Omran, H. Hasanien
This paper provides optimal day-ahead dispatch for multi-zone isolated AC/DC microgrids (MGs). The proposed approach aims to reduce the daily operational costs and customer power supply interruptions by effectively managing the MG resources. The problem is defined as a constrained integer non-linear optimization problem and is solved with the Hunger Game Search (HGS) algorithm. The HGS performance is compared to the Sine Cosine Algorithm (SCA) and Particle Swarm Optimization (PSO). The simulations' results demonstrate the proposed approach's effectiveness in achieving the required objectives.
本文研究了多区隔离交直流微电网的最优日前调度问题。建议的方法旨在通过有效管理电力资源,减少日常运营成本和客户供电中断。将该问题定义为约束整数非线性优化问题,采用饥饿游戏搜索算法求解。将HGS算法的性能与正弦余弦算法(SCA)和粒子群算法(PSO)进行了比较。仿真结果表明,该方法能够有效地达到预期目标。
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引用次数: 0
Performance Analysis of a Novel High Gain Three-phase Split Source Inverter 一种新型高增益三相分源逆变器性能分析
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021782
M. Ismeil, A. Abdelaleem, M. Nasrallah, Essam E. M. Mohamed
The single-stage inverter has gained great importance nowadays because of its small size, small weight, low costs, and the ease of its control methods. Several topologies of the single-stage inverter were previously presented such as the Z-Source Inverter (ZSI) and its modified versions, and the Y-Source Inverter (YSI). Split Source Inverter (SSI) has been presented with additional advantages such as using the same modulation techniques of Voltage Source Inverter (VSI), and continuous input current and input voltage. Some applications require a higher voltage gain inverter due to their poor output voltages. In this paper switched inductor has replaced the normal inductor in the three-phase split source inverter to enhance the voltage gain. The theoretical operation of the proposed Switched Inductor Split Source Inverter (SL-SSI) has been studied and analyzed, then verified using MATLAB/Simulink software. Simulation results and theoretical analyses have shown that the proposed SL-SSI increases the gain of traditional SSI at a substantial rate.
单级逆变器由于其体积小、重量轻、成本低、控制方法简单等优点,在当今社会中得到了广泛的重视。以前提出了单级逆变器的几种拓扑结构,如z源逆变器(ZSI)及其修改版本,以及y源逆变器(YSI)。分源逆变器(SSI)具有与电压源逆变器(VSI)相同的调制技术以及连续输入电流和输入电压等优点。由于输出电压差,一些应用需要更高的电压增益逆变器。本文用开关电感代替三相分源逆变器中的普通电感来提高电压增益。对所提出的开关电感分源逆变器(SL-SSI)的理论工作原理进行了研究和分析,并用MATLAB/Simulink软件进行了验证。仿真结果和理论分析表明,所提出的SL-SSI能大幅度提高传统SSI的增益。
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引用次数: 3
A Novel Technique of Fuzzy Comparison for Generators' Optimal Maintenance Scheduling 发电机最优维修计划的模糊比较新方法
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021696
M. Y. El-Sharkh, N. Sisworahardjo
A key issue in solving fuzzy optimization problems is selecting an appropriate fuzzy comparison technique. This paper introduces a novel fuzzy comparison technique that can work with any fuzzy optimization problem. The new technique is employed to determine the best maintenance schedule (MS) of electric generators. To solve the MS problem, the new fuzzy comparison technique is implemented in conjunction with the use of the evolutionary programming. Unlike other fuzzy comparison techniques, the objective of the proposed technique is to compare between fuzzy numbers based on the midpoint and the upper limits for minimization problems. Which in turn controls the upper limit of the final solution and yields a better minimum solution for the problem. In this paper, the IEEE 30-bus system is used to test the proposed technique with fuzzy load and maintenance cost. Results of comparing the proposed technique with Chen's and Yager's approaches show lower cost compared to Chen's and slightly lower cost compared to Yager's techniques.
解决模糊优化问题的一个关键问题是选择合适的模糊比较技术。本文介绍了一种新的模糊比较技术,它可以处理任何模糊优化问题。将该方法应用于发电机最佳维修计划的确定。为了解决该问题,结合进化规划的应用,实现了新的模糊比较技术。与其他模糊比较技术不同,所提出的技术的目标是在最小化问题的中点和上限的模糊数之间进行比较。它反过来控制最终解的上限,并产生问题的更好的最小解。本文以IEEE 30总线系统为例,在模糊负载和维护费用的情况下对所提出的技术进行了测试。将所提出的技术与Chen和Yager的方法进行比较的结果表明,与Chen的方法相比成本更低,与Yager的方法相比成本略低。
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引用次数: 0
An improved RCGA for Parameter extraction of three-diode PV model 一种用于三二极管PV模型参数提取的改进RCGA
Pub Date : 2022-12-13 DOI: 10.1109/MEPCON55441.2022.10021732
M. El-Dabah, R. El-Sehiemy, A. Abdelbaset
In recent years, it was noticed an increased involvement of the renewable energy resources such as the solar photovoltaics (PV's) to share into covering the increased load requirements in modern power systems. Electrical ciruits are developed to model PV cells/modules. Parameter extraction of the appropriate PV modules is one of the hot research topics that attract researchers' for possible assessing the performance and operation and control issues of PVs. Parameters estimation of PV cells is a highly nonlinear optimization problem, in this regard several optimization algorithms are exploited to tackle this challenge. In this study, the improved real coded genetic algorithm (IRGA) spreads an enhanced performance of the well-known genetic algorithms. The IRGA investigated parameter extraction of the most accurate diode PV module model for PV commercial modules. The attained result of the IRGA shows the high accuracy of the estimated parameters. This can be validated from the examination of the identified parameters to plot the I-v curve and show the accompaniment of the estimated and measured values. Moreover, the IRGA convergence curve shows up a competitive convergence rate and robustness when assessed with other recent optimization algorithms.
近年来,人们注意到可再生能源如太阳能光伏(PV’s)越来越多地参与到现代电力系统中,以满足日益增加的负荷需求。开发电路来模拟PV电池/模块。合适光伏组件的参数提取是研究人员关注的热点之一,为评估光伏性能和运行控制问题提供了可能。光伏电池参数估计是一个高度非线性的优化问题,在这方面,有几种优化算法被用来解决这一挑战。在本研究中,改进的实数编码遗传算法(IRGA)扩展了已知遗传算法的性能。IRGA研究了最精确的二极管光伏组件模型参数提取方法。结果表明,IRGA的估计参数具有较高的精度。这可以通过对已识别参数的检查来验证,以绘制I-v曲线并显示估计值和测量值的伴随值。此外,与其他最新的优化算法相比,IRGA收敛曲线显示出具有竞争力的收敛速度和鲁棒性。
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引用次数: 0
期刊
2022 23rd International Middle East Power Systems Conference (MEPCON)
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