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2021 IEEE Texas Power and Energy Conference (TPEC)最新文献

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Pub Date : 2021-02-02 DOI: 10.1109/tpec51183.2021.9384978
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引用次数: 0
Discrete Fréchet Distance Algorithm-Based Faulty Feeder Selection Method for Flexible Grounding System in Distribution Networks 基于离散fr<s:1>距离算法的配电网柔性接地系统故障馈线选择方法
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384920
Chi Zhang, Kangli Liu, Sen Zhang, Biyang Liu, Jianfeng Zhao
Flexible grounding system is a new technology that applies power electronic equipment to grounding systems. The most typical characteristic is that when a single-phase ground fault occurs, it can inject a compensation current into the system through power electronic equipment to achieve arc extinguishing. However, when faced with a high-resistance ground fault, the flexible grounding system cannot accurately select the faulty feeder in the application of traditional faulty selection methods. A faulty feeder identification method combining the discrete Fréchet Distance and wavelet packet transform is proposed in this paper to solve the problem. The wavelet packet transform is used to extract the characteristic quantity of the zero-sequence current when a single-phase ground fault occurs. Meanwhile, Fréchet Distance is used to calculate the waveform similarity of the extracted characteristic curve. Finally, according to the likeness of each curve, the faulty feeder can be selected. The simulation results based on MATLAB/Simulink prove that this method can quickly and accurately choose faulty feeders.
柔性接地系统是一种应用于电力电子设备接地系统的新技术。最典型的特点是在发生单相接地故障时,可通过电力电子设备向系统注入补偿电流,实现灭弧。然而,在面对高阻接地故障时,采用传统的故障选择方法,柔性接地系统无法准确地选择故障馈线。为了解决这一问题,提出了一种结合离散fr切距离和小波包变换的故障馈线识别方法。采用小波包变换提取单相接地故障时零序电流的特征量。同时,利用fr距离法计算提取的特征曲线的波形相似度。最后,根据各曲线的相似度,选择故障给料机。基于MATLAB/Simulink的仿真结果表明,该方法可以快速准确地选择故障馈线。
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引用次数: 1
A Primal-Dual based Approach to Social Welfare problem for Electric Vehicle Charging 基于原始对偶的电动汽车充电社会福利问题研究
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384981
Deepak Tiwari, V. Verma, S. K. Solanki, J. Solanki
The simultaneous charging of Electric Vehicles (EVs) put extra burden on the distribution grid. The necessity of coordinated charging and discharging of EVs is very vital. This brings the EV owner and utility to act together to maximize their profits without affecting the grid from load congestion, voltage instability, and transformer overloading. In this paper, we formulate the benefits of utility and EV owner as a social welfare problem. The objective is to maximize the problem taking into account the generation costs and the battery charging costs. The optimization problem is casted as a dynamics problem using a primal-dual approach. The simulation results are presented to demonstrate the feasibility of the proposed solution and the optimal energy management during the peak load for Time of Use (ToU) pricing.
电动汽车的同步充电给配电网带来了额外的负担。电动汽车协调充放电的必要性是非常重要的。这使得电动汽车所有者和公用事业公司共同行动,在不影响电网负荷拥塞、电压不稳定和变压器过载的情况下实现利润最大化。本文将公用事业公司和电动汽车车主的利益作为一个社会福利问题来考虑。目标是在考虑发电成本和电池充电成本的情况下使问题最大化。利用原对偶方法将优化问题转化为动力学问题。仿真结果验证了所提方案的可行性,以及最优的高峰负荷分时电价能源管理。
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引用次数: 0
Investigation of Limitations in Active Damping Control of LCL Filter Resonance using Inverter Side Current Feedback in Grid Connected Voltage Source Converter 并网电压源变换器逆变侧电流反馈对LCL滤波器谐振主动阻尼控制的局限性研究
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384938
Satyanarayana Muddasani, A. V. Ravi Teja
This paper investigates the active damping of LCL filter resonance in a grid connected voltage source inverter. The active damping realized using feedback of inverter side current is considered for analysis. A detailed study showing suitable choice of resistor required for resonance damping in case of the passive and active damping methods is presented. An explicit study showing the limitations of active damping over passive damping for a chosen Switching and resonance frequencies has carried out. The proposed work is simulated using MATLAB/Simulink for the resonance frequency of 1.4kHz and switching frequency of 10KHz. Typical results are reported and analyzed. It is observed from results that the virtual resistor introduced using active damping technique is unlike to the passive damping after a point of Rd values. This issue can be resolved by choosing controller bandwidth adaptive to the changes present in value of virtual resistor.
本文研究了一种并网电压源逆变器中LCL滤波器谐振的主动阻尼。分析了利用逆变器侧电流反馈实现的主动阻尼。详细研究了在被动和主动阻尼两种情况下,谐振阻尼所需电阻的选择。一项明确的研究表明,在选定的开关和谐振频率下,主动阻尼比被动阻尼的局限性已经进行。在谐振频率为1.4kHz、开关频率为10KHz的条件下,利用MATLAB/Simulink对所提出的工作进行了仿真。对典型结果进行了报告和分析。从结果中可以看出,采用主动阻尼技术引入的虚电阻不同于在一个Rd值点后的被动阻尼。这个问题可以通过选择适应虚电阻值变化的控制器带宽来解决。
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引用次数: 2
A Dual-Switch Coupled Inductor-Based High Step- Up DC-DC Converter for Photovoltaic-Based Renewable Energy Applications 基于双开关耦合电感的高阶跃DC-DC变换器,用于光伏可再生能源应用
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384916
Ramin Rahimi, Saeed Habibi, P. Shamsi, M. Ferdowsi
This paper proposes a dual-switch DC-DC converter with high-voltage gain for solar Photovoltaic (PV) systems. High-voltage gain is obtained by combining the coupled inductor (CI) and switched-capacitor (SC) voltage boosting techniques. Combining CI and SC techniques, the design flexibility is increased, and low voltage stresses on the semiconductor devices are achieved, which leads to the adoption of low-voltage-rating semiconductor devices with low ON-state resistance resulting in low switching and conduction losses. Unlike the conventional boost converter, thanks to the existence of leakage inductance, the output diode turns off naturally in the proposed converter, which suppresses the reverse-recovery problem and losses. Operation principle and steady-state analysis are discussed to show the advantages of the proposed DC-DC converter. To verify the operation of the proposed converter, a performance comparison is provided. Moreover, the simulation of a 200 W converter with 20 V input and 400V output is carried out using PLECS Blockset.
提出了一种用于太阳能光伏系统的高电压增益双开关DC-DC变换器。通过耦合电感(CI)和开关电容(SC)升压技术的结合,获得了高电压增益。结合CI和SC技术,增加了设计的灵活性,实现了半导体器件上的低电压应力,从而采用了具有低导通状态电阻的低额定电压半导体器件,从而降低了开关和传导损失。与传统升压变换器不同,由于漏感的存在,该变换器的输出二极管自然关断,从而抑制了反向恢复问题和损耗。讨论了工作原理和稳态分析,说明了所提出的DC-DC变换器的优点。为了验证所提出的转换器的运行,提供了性能比较。此外,利用PLECS Blockset对输入为20v、输出为400V的200w变换器进行了仿真。
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引用次数: 9
A Novel Sliding Mode Control Method of Interior-Mounted PMSM 一种新型内装式永磁同步电机滑模控制方法
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384961
Hashim Alnami, C. Pang, Qilin Wang
Energy efficiency and output uncertainty are two of the most challenges that dynamic conversion is facing. Controlling the dynamic system variables is complicated due to the variability and unpredictability of the parameters, especially fast transient response. Sliding mode control is one effective technique that has been used to control and improve dynamic conversion system efficiency and to reach the rated values. Most of the recent research focus on the design, performance, and behaver study of sliding mode control in order to enhance the control system's performance. This paper presents a new Sliding mode control method of Interior-mounted permanent magnet synchronous motor. The proposed model solves many controlling problems that many other controllers facing such as PI controller, LQ regulator, and even PID linear methods. Also, the model has fast control response to the IPMSM fast dynamic transient and can solve the overshoot problem which leads the system to have more efficient performance. The results of SMC have been compared to PID controller applied to the same system. The simulation results have shown better performance of sliding mode control over the PID controller. The results are simulated using MATLAB Simulink software.
能源效率和输出不确定性是动态转换面临的两个最大挑战。由于系统参数的可变性和不可预测性,特别是瞬态响应的快速性,控制系统的动态变量非常复杂。滑模控制是一种有效的控制和提高动态转换系统效率并使其达到额定值的技术。为了提高控制系统的性能,近年来的研究大多集中在滑模控制的设计、性能和行为研究上。本文提出了一种新的内置式永磁同步电动机滑模控制方法。该模型解决了PI控制器、LQ调节器、甚至PID线性方法等控制器所面临的许多控制问题。该模型对IPMSM的快速动态暂态具有快速的控制响应,能够解决超调问题,使系统具有更高效的性能。并与应用于同一系统的PID控制器的控制结果进行了比较。仿真结果表明,滑模控制优于PID控制。利用MATLAB Simulink软件对实验结果进行了仿真。
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引用次数: 2
Design and Control of Bidirectional DC- DC Converter for Active Power Decoupling 用于有源功率解耦的双向DC- DC变换器的设计与控制
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384977
Varunkumar Rai, Pushkar Saraf, V. Hari
Single-phase power AC-DC conversion systems face an inherent problem of double-frequency current ripple on the DC port of the system. The simplest solution to this problem is to connect a filter capacitance across the DC port of the converter. But, it leads to low power density and reduces reliability. These limitations can be overcome by replacing the bulky capacitance with an Active Power Decoupler (APD). The present work focuses on the design and control of a bidirectional DC-DC converter-type APD (BDC-APD). A systematic procedure to design the various circuit elements in the APD and the high frequency capacitor across the DC-bus is proposed. Generation of double frequency current reference using second-order generalized integrator (SOGI) is presented and two controller structures for BDC-APD are compared. Results from the numerical simulation are presented to support the proposed design methods and to validate the controller performance.
单相电源交直流转换系统的直流端口存在固有的双频纹波问题。这个问题最简单的解决方案是在转换器的直流端口上连接一个滤波电容。但是,它会导致低功率密度和降低可靠性。这些限制可以通过用有源功率去耦(APD)取代笨重的电容来克服。本文主要研究了一种双向DC-DC变换器型APD (BDC-APD)的设计与控制。系统地设计了APD中各种电路元件和跨直流母线的高频电容。提出了利用二阶广义积分器(SOGI)产生双频电流基准的方法,并对BDC-APD的两种控制器结构进行了比较。数值仿真结果支持了所提出的设计方法,并验证了控制器的性能。
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引用次数: 0
Load Frequency Control for Power Systems with I/O Time Delays Via Discrete-Time Prediction-Based Event-Triggered Control 基于离散时间预测的事件触发控制的I/O时滞电力系统负荷频率控制
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384917
Sumant Anand, Ark Dev, Mrinal Kanti Sarkar
The article proposes a prediction-based event-triggered control (ETC) approach for frequency regulation in power systems with input and output (I/O) time delays. The proposed design compensates for the I/O time delays in the system and saves communication channel bandwidth. The idea is designed in discrete-time domain to facilitate greater sampling period and to improve transient behavior. The event-triggering mechanism is used in both the sensor-to-controller and the controller-to-actuator node to saves more communication constraints. Thus, to limit the number of packets sent over a network. The closed-loop system stability is theoretically proved thanks to the concept of uniform ultimate boundedness. The simulation results confirm the efficiency of the proposed design for a single-area power system.
本文提出了一种基于预测的事件触发控制(ETC)方法,用于具有输入输出(I/O)时滞的电力系统的频率调节。该设计补偿了系统的I/O时延,节省了通信信道带宽。该思想被设计在离散时域,以方便更大的采样周期和改善瞬态行为。在传感器到控制器节点和控制器到执行器节点都采用了事件触发机制,以节省更多的通信约束。因此,限制通过网络发送的数据包数量。利用一致极限有界性的概念,从理论上证明了闭环系统的稳定性。仿真结果证实了该设计在单区域电力系统中的有效性。
{"title":"Load Frequency Control for Power Systems with I/O Time Delays Via Discrete-Time Prediction-Based Event-Triggered Control","authors":"Sumant Anand, Ark Dev, Mrinal Kanti Sarkar","doi":"10.1109/TPEC51183.2021.9384917","DOIUrl":"https://doi.org/10.1109/TPEC51183.2021.9384917","url":null,"abstract":"The article proposes a prediction-based event-triggered control (ETC) approach for frequency regulation in power systems with input and output (I/O) time delays. The proposed design compensates for the I/O time delays in the system and saves communication channel bandwidth. The idea is designed in discrete-time domain to facilitate greater sampling period and to improve transient behavior. The event-triggering mechanism is used in both the sensor-to-controller and the controller-to-actuator node to saves more communication constraints. Thus, to limit the number of packets sent over a network. The closed-loop system stability is theoretically proved thanks to the concept of uniform ultimate boundedness. The simulation results confirm the efficiency of the proposed design for a single-area power system.","PeriodicalId":354018,"journal":{"name":"2021 IEEE Texas Power and Energy Conference (TPEC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133026761","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: 1
Indirect IMC based PID Controller Design for Single Area LFC System in the Presence of Uncertainty and Communication delay 存在不确定性和通信延迟的单区域LFC系统的间接IMC PID控制器设计
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384926
Padmalaya Dehuri, Y. V. Hote
In today's fast growing world, there is an absolute demand of good quality power supply. Lots of research has been undertaken in this perspective but the external disturbance rejection and the parametric uncertainties remain a crucial issue for the control engineers. Therefore, in this paper, an indirect approach of IMC-PID controller design technique is proposed for LFC system. This control algorithm introduces a shifting variable Ψ for the designing of controller parameters so as to improve the performance and robustness of the system. The effectiveness of the proposed control technique is verified through the comparative study of disturbance rejection ability and computation of performance indices with the existing integer order control techniques. Besides, the robustness of the proposed technique is verified in the presence of parametric uncertainties, communication delay and system nonlinearities. The simulation results reveal that the proposed control technique exhibits better disturbance rejection, an improved transient performance as well as robustness to uncertain system parameters and communication delay in comparison to various integer order controller techniques exist in the literature.
在当今快速发展的世界中,对优质电源的需求是绝对的。在这方面已经进行了大量的研究,但外部干扰的抑制和参数的不确定性仍然是控制工程师面临的关键问题。因此,本文针对LFC系统提出了一种间接的IMC-PID控制器设计方法。该控制算法引入移位变量Ψ进行控制器参数的设计,以提高系统的性能和鲁棒性。通过与现有整阶控制技术的抗干扰能力和性能指标计算的对比研究,验证了所提控制技术的有效性。此外,在存在参数不确定性、通信延迟和系统非线性的情况下,验证了该方法的鲁棒性。仿真结果表明,与文献中存在的各种整数阶控制器技术相比,所提出的控制技术具有更好的抗干扰性,改进的暂态性能以及对不确定系统参数和通信延迟的鲁棒性。
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引用次数: 1
PIDD2 Controller Design Based on Internal Model Control Approach for a Non-Ideal DC-DC Boost Converter 基于内模控制方法的非理想DC-DC升压变换器PIDD2控制器设计
Pub Date : 2021-02-02 DOI: 10.1109/TPEC51183.2021.9384954
Mahendra Kumar, Y. V. Hote
In Today's world, the penetration of renewable energy sources in the modern power system for electrification of society and industry, is exponential growing. The dc-dc converter is the most important circuitry in such type of systems to regulate the output voltage. The boost converter is mostly preferred for step-up the output voltage level in practical applications. The output voltage regulation is a challenging task for control engineers of the boost converter. In this direction, the paper addresses a novel PID-Type controller for output voltage control of a non-ideal dc-dc boost converter. This novel PID-Type controller is a proportional-integral-derivative-double derivative (PIDD2) control design. Most important concern with the proposed control design is that a few tuning algorithms are available in the literature. In the paper, the tuning of PIDD2 is carried-out using internal model control (IMC) method. IMC is a robust tunning approach. The robustness of proposed control system is evaluated under the sudden change in load, sudden change in supply voltage, and sudden change in reference voltage. The efficacy of proposed control scheme is evaluated in comparison to the existing control schemes. The simulation results show the efficacy and effectiveness of the proposed controller design under the influence of different uncertainties and perturbations. Further, the experimental results present for the validation of proposed control design on nonideal dc-dc boost converter.
当今世界,可再生能源在电气化社会和工业的现代电力系统中的渗透,正呈指数级增长。dc-dc变换器是这类系统中最重要的输出电压调节电路。在实际应用中,升压变换器主要用于提高输出电压水平。对升压变换器的控制工程师来说,输出电压的调节是一项具有挑战性的任务。在这个方向上,本文提出了一种用于非理想dc-dc升压变换器输出电压控制的新型pid型控制器。这种新型pid控制器采用比例-积分-导数-双导数(PIDD2)控制设计。对于所提出的控制设计最重要的关注是,在文献中有一些可用的调谐算法。本文采用内模控制(IMC)方法对PIDD2进行整定。IMC是一种健壮的调谐方法。在负荷突然变化、电源电压突然变化和参考电压突然变化的情况下,评估了所提控制系统的鲁棒性。通过与现有控制方案的比较,对所提控制方案的有效性进行了评价。仿真结果表明,在不同不确定性和摄动的影响下,所提出的控制器设计是有效的。此外,实验结果验证了所提出的非理想dc-dc升压变换器控制设计。
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引用次数: 4
期刊
2021 IEEE Texas Power and Energy Conference (TPEC)
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