• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2016, Vol. 37 ›› Issue (2): 42-49.doi: 10.3969/j.issn.1000-7229.2016.02.006

• 电力系统故障诊断栏 ·目主持 文福拴教授· • 上一篇    下一篇

利用暂态分量的含分布式电源配电系统故障诊断

雷倩1,吉兴全1,文福拴2,3,刘志鹏4,于永进1,许焕奇1   

  1. 1. 山东科技大学电气与自动化工程学院,山东省青岛市 266510; 2. 浙江大学电气工程学院,杭州市 310027; 3. 文莱科技大学电机与电子工程系,文莱斯里巴加湾 BE1410; 4. 海南电网公司电力调度控制中心,海口市 570203
  • 出版日期:2016-02-01
  • 作者简介:雷倩(1991),女,硕士研究生,主要从事配电系统自动化方面的研究工作; 吉兴全(1970),男,副教授,本文通信作者,主要从事配电系统自动化、智能电网等方面的研究工作; 文福拴(1965),男,教授,博士生导师,主要从事电力系统故障诊断、系统恢复和电力市场、智能电网与电动汽车等方面的研究工作; 刘志鹏(1983),男,博士,工程师,主要从事电力系统运行与控制方面的研究工作; 于永进(1980),男,讲师,主要从事电力系统自动化方面的研究工作; 许焕奇(1992),男,硕士研究生,主要从事电力系统自动化方面的研究工作。
  • 基金资助:

    国家高技术研究发展计划项目 (863计划) (2015AA050202)

Fault Diagnosis of Distribution System with Distributed Generation Employing Transient Component

LEI Qian1, JI Xingquan1, WEN Fushuan2,3, LIU Zhipeng4, YU Yongjin1, XU Huanqi1   

  1. 1. College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266510, Shandong Province, China;2. School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;3. Department of Electrical and Electronic Engineering, Institut Teknologi Brunei, Bandar Seri Begawan BE1410, Brunei;4. Power Dispatching and Control Center, Hainan Power Grid Corporation, Haikou 570203, China
  • Online:2016-02-01
  • Supported by:

    Project supported by National High Technology Research and Development Program of China (863 Program) (2015AA050202)

摘要:

在智能配电系统快速发展的背景下,分布式电源(distributed generation,DG)越来越多地接入配电系统,传统的针对单端电源的配电系统故障诊断方法不再适用。在此背景下,针对含有DG的配电系统,提出一种基于故障暂态分量和遗传算法的配电系统故障诊断方法。针对DG接入使故障点的暂态零序电流方向复杂化的问题,通过给定开关上下游电源的方式改善了终端的状态编码环节,且考虑了故障线路诊断的优先级。采用小波分析方法提取故障暂态分量,能够很好地适应我国中压配电系统广泛采用的小电流接地方式,在相当程度上解决了单相接地短路稳态故障信息不明显的问题。最后,用算例说明了所提出方法的可行性,分析了其对故障信息畸变和丢失的容错性能。

关键词: 配电系统, 故障诊断, 分布式电源, 暂态分量, 遗传算法

Abstract:

With the fast development of smart distribution systems, more and more distributed generation (DG) sources are connected, so traditional fault diagnosis approaches for distribution systems with single power source are no longer applicable. Given this background, this paper proposes a fault diagnosis method based on fault transient components and genetic algorithm for distribution systems with DGs. Considering that the DG connections make the transient zero-sequence current direction complicated at fault point, an improved coding method for feeder terminal units is presented by specifying the upstream and downstream power sources for each switch, and the priority level of a faulted line to be diagnosed is also taken into account. We adopt a wavelet based method to extract fault transient components, which is well applicable for the widely-implemented non-effective grounding in middle-voltage distribution systems in China, and can solve, to some extent, the problem of inconspicuous steady fault current with single-phase ground faults. Finally, we demonstrate the proposed method with a sample system, and analyze its fault tolerance performance for distorted and missing fault information.

Key words: distribution system, fault diagnosis, distributed generation, transient component, genetic algorithm

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