中国电力 ›› 2014, Vol. 47 ›› Issue (3): 85-89.DOI: 10.11930/j.issn.1004-9649.2014.3.85.4

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微网孤岛运行时短路故障检测的仿真研究

周建萍, 徐司聪   

  1. 上海电力学院 自动化工程学院,上海200090
  • 收稿日期:2013-12-15 出版日期:2014-03-31 发布日期:2015-12-18
  • 作者简介:周建萍(1978-),女,博士,副教授,研究方向为分布式发电与微网技术、电能质量分析与检测。E-mail: zhoujianping@shiep.edu.cn
  • 基金资助:
    国家自然科学基金项目(61275038); 上海市教育委员会重点学科建设项目(J51303)

Simulation Research of Short-circuited Fault Detection with Micro-grid in Islanded Operation

ZHOU Jian-ping, XU Si-cong   

  1. School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
  • Received:2013-12-15 Online:2014-03-31 Published:2015-12-18

摘要: 利用Matlab/simulink对含分布式电源的微网进行建模与仿真,对微网由孤岛切换至并网运行方式下的运行工况进行仿真实验,仿真结果验证了所构建的微网仿真模型的有效性。在该仿真模型的基础上加入三相故障模块模拟微网孤岛运行时发生短路故障,选取db小波检测短路故障发生后的电压信号,仿真结果表明db小波能够准确地检测短路故障信号的奇异点,为下一步改善微网电能质量提供有力依据。

关键词: 小波分析, 分布式电源, 微网, 短路故障

Abstract: Micro-grid with distributed generation is modeled and simulated with Matlab/Simulink. Simulation experiments are made when operating mode of micro-grid is switched from the islanded mode to the grid-connected mode. The simulation results demonstrate the effectiveness of the built micro-grid simulation model. Short-circuited fault is simulated in micro-grid's islanded operation by adding the three-phase fault module to the above simulation model. Db wavelet is selected to detect the voltage of short-circuited fault. The simulation results show that db wavelet can accurately detect the singularity of the short-circuited fault signal, which provides support for improving the power quality of the micro-grid.

Key words: wavelet analysis, distributed generation(DG), micro-grid, short-circuited fault

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