| 引用本文: | 宋伊宁,李天友,薛永端,黄建业,陈恒,徐丙垠.基于配电自动化系统的分布式小电流接地故障定位方法[J].电力自动化设备,2018,(4): |
| SONG Yining,LI Tianyou,XUE Yongduan,HUANG Jianye,CHEN Heng,XU Bingyin.Distributed small-current grounding fault locating method based on power distribution network automation system[J].Electric Power Automation Equipment,2018,(4): |
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| 摘要: |
| 现有依赖主站的集中式小电流接地故障定位方法参与环节多，不同厂家的产品之间不易配合。从系统结构、动态拓扑识别、通信配置以及基本工作模式等方面，验证了分布式故障处理方法可实现小电流接地故障定位。现有的故障定位算法不能适用于分布式控制系统，需提出适用于分布式故障定位的新算法。给出了适用于分布式故障定位的小电流接地故障暂态等值电路，重点分析了故障区段、故障点上游与下游健全区段两侧暂态零序电流相关系数、暂态零序电流有效值系数以及暂态零序电流峰值与工频零序电流幅值之比，提出综合利用上述故障零序电流特征、满足分布式故障处理要求的故障定位算法，可提高小电流接地故障暂态定位技术的适用性，解决不同厂家产品配合的难题。仿真和现场数据验证了所提方法的有效性。 |
| 关键词: 小电流接地系统 单相接地故障 故障定位 分布式故障处理 配电 配电自动化 暂态 |
| DOI：10.16081/j.issn.1006-6047.2018.04.015 |
| 分类号:TM726 |
| 基金项目:国家自然科学基金资助项目(51477184)；国家电网公司科技项目(52130416000D) |
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| Distributed small-current grounding fault locating method based on power distribution network automation system |
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SONG Yining1, LI Tianyou2, XUE Yongduan1, HUANG Jianye3, CHEN Heng4, XU Bingyin4
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1.College of Information and Control Engineering, China University of Petroleum(East China),Qingdao 266580, China;2.State Grid Fujian Electric Power Company, Fuzhou 350003, China;3.State Grid Fujian Electric Power Research Institute, Fuzhou 350007, China;4.Shandong Kehui Power Automation Co.,Ltd.,Zibo 255087, China
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| Abstract: |
| The existing centralized locating methods based on the master station have many links and are difficult for cooperation among the products from different manufacturers. From the aspects of system structure, dynamic topology identification, communication configuration and basic work mode, it is verified that the distributed fault processing method could adapt to the small-current grounding fault locating. However, the existing centralized locating methods no longer adapt to distributed control systems, so novel methods satisfying the demand of distributed fault locating must be proposed. The transient equivalent circuit of small-current grounding fault adapting to distributed fault locating is given. The transient zero-sequence current similarity coefficients, transient zero-sequence current RMS coefficients and the ratios of transient zero-sequence current peak value to power frequency current magnitude at both sides of the fault section, upstream/downstream healthy sections are analyzed, based on which, a novel fault locating method based on the zero-sequence current characteristics is proposed, which meets the requirement of distributed fault processing. The proposed method could improve the adaptability of the transient locating technology of small-current grounding fault, and solve the difficulties of cooperation among products from different manufacturers. The effectiveness of the proposed method is verified by simulative and field data. |
| Key words: small-current grounding network single-phase grounding fault electric fault location distributed fault processing electric power distribution electric power distribution automation transients |
