含微网的配电网电压暂降检测算法仿真
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摘要
配电网电能质量问题是目前电力系统面临的关键问题之一,其中电压暂降对用户和设备的影响最为严重。在分析延时90°法、求导法、延时小角度法以及变步长差分法原理的基础上,基于Matlab/simulink仿真平台,搭建含微网的配电网电压暂降检测模型,对4种算法的检测特性进行仿真比较,同时对比分析了其在微网退出运行时的检测特性。结果表明,4种算法均能对电压暂降进行检测,其中求导法检测响应速度快,而变步长差分法抗干扰能力强。为4种算法投入实际应用提供了实验依据,同时对含微网的配电网优选何种检测算法具有一定的参考价值。
The power quality of distribution network is one of the key problems in power system, among which the voltage sag has the most serious impact on users and equipments. After analyzing the methods including delaying 90°, derivation, delaying a small angle and utilizing variable-step difference, the paper establishes the voltage sag detection model for the distribution network with micgrogrid based on Matlab/Simulink simulation platform, makes detection performance comparison among the four algorithms mentioned above. The results show that the voltage sag can be detected by using one of four algorithms; the derivation method is of a fast response speed while the method of utilizing variable-step difference has strong anti-interference ability. It provides experimental basis for the practical application of the four algorithms, creating a reference value for selecting the detection algorithm for the distribution network with microgrid.
The power quality of distribution network is one of the key problems in power system, among which the voltage sag has the most serious impact on users and equipments. After analyzing the methods including delaying 90°, derivation, delaying a small angle and utilizing variable-step difference, the paper establishes the voltage sag detection model for the distribution network with micgrogrid based on Matlab/Simulink simulation platform, makes detection performance comparison among the four algorithms mentioned above. The results show that the voltage sag can be detected by using one of four algorithms; the derivation method is of a fast response speed while the method of utilizing variable-step difference has strong anti-interference ability. It provides experimental basis for the practical application of the four algorithms, creating a reference value for selecting the detection algorithm for the distribution network with microgrid.
引文
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[2] SHEN Y W, CUI M J, WANG Q, et al. Comprehensive reactive power support of DFIG adapted to different depth of voltage sags[J]. Energies, 2017, 10(6):808-827.
[3]杨亚飞,颜湘武,娄尧林,等.一种新的电压骤降特征量检测方法[J].电力系统自动化,2004,28(2):41-44.YANG Yafei, YAN Xiangwu, LOU Yaolin, et al. A new method to detect voltage sag characteristics[J]. Automation of Electric Power Systems, 2004,28(2):41-44.
[4]张庆超,肖玉龙.一种改进的电压暂降检测方法[J].电工技术学报,2006,21(2):123-126.ZHANG Qingchao, Xiao Yulong. An improved detection method of voltage sag[J]. Transactions of China Electrotechnical Society, 2006,21(2):123-126.
[5]瞿硕,黄纯,江亚群,等.DVR电压暂降检测新方法[J].电工技术学报,2013,28(x):234-239.ZHAI Shuo, HUANG Chun, et al. A new detection method of voltage sag applied in DVR[J]. Transactions of China Electrotechnical Society,2013,28(x):234-239.
[6]陈鹏伟,李璐,等.一种基于变步长差分的电压暂降检测方法[J].现代电力,2016,33(3):76-81.CHEN Pengwei, LI Lu, et al. A voltage sag detection method based on variable step difference[J]. Modern Electric Power,2016,33(3):76-81.
[7]马永翔,王一君,闫群民,等.基于HAPF的光伏微电网谐波抑制研究[J].可再生能源,2018,36(12):1776-1780.MA Yongxiang, WANG Yijun, YAN Qunmin, et al.Study on harmonic suppression of photovoltaic microgrid based on HAPF[J]. Renewable Energy Resources, 2018,36(12):1776-1780.
[8]黄中柏,刘亚勋,黄辉,等.燃气分布式能源站蓄能系统节能改造及分析[J].湖北电力,2017,41(6):32-34.HUANG Zhongbai, LIU Yaxun, HUANG Hui,et al.Energy saving transformation and analysis of energy storage system of gas distributed energy station[J]. Huhei Electric Power, 2017,41(6):32-34.
[9]赵贵龙,曹玲玲,祝龙记.基于光伏并网逆变系统的改进锁相环设计[J].电力系统保护与控制,2015,43(2):108-112.ZHAO Guilong, CAO Lingling, ZHU Longji. Improved PLL design of PV grid inverter system[J]. Power System Protection and Control,2015,43(2):108-112.
[10]常佳蕾.分布式光伏电源接入对配电网影响及并网规划研究[D].华北电力大学,2016.
[11]刘全,王飞,严星,等.含分布式光伏电源的配电网故障分析与研究[J].智慧电力,2018,46(8):79-83.LIU Quan, WANG Fei, YAN Xing, et al. Analysis of distribution network faults with distributed photovoltaic power supply[J]. Smart Power,2018,46(8):79-83.
[12]熊连松,卓放,祝明华,等.单相电力信号同步相位的快速捕获方法研究[J].中国电机工程学报,2015, 35(9):2209-2216.XIONG Liansong, ZHUO Fang, ZHU Minghua, et al.Research on fast phase synchronization in single-phase power systems[J]. Proceedings of the CSEE, 2015, 35(9):2209-2216.