光伏电站上网线路不同相相继多点故障保护动作行为分析及改进措施

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英文篇名：Analysis and Improvement Measures of Protection Action After Successive Multi-Point Faults in Different Phases of Grid-Connected Line of Photovoltaic Power Station 作者：李广智 ; 李银业 英文作者：LI Guangzhi;LI Yinye;State Grid Haixi Power Supply Company; 关键词：光伏电站典型配置 ; 保护行为分析 ; 改进措施 英文关键词：typical configuration of photovoltaic power plants;;analysis of protection behavior;;improvement measures 中文刊名：DGJY 英文刊名：Electric Engineering 机构：国网海西供电公司; 出版日期：2019-05-25 出版单位：电工技术 年：2019 期：No.496 语种：中文; 页：DGJY201910049 页数：3 CN：10 ISSN：50-1072/TM 分类号：123-124+131

摘要

本文针对某光伏电站35kV上网线路及集电线路不同相依次发生多点接地故障后不同保护动作的情况进行了分析,并根据分析结果,提出了几种典型光伏电站接线方式下低压系统接地方式的建议及光差保护装置启动程序的改进措施。
        In this paper,different protection actions of 35 kV grid-connected line and collection line after multi-point grounding faults in different phases of a photovoltaic power plant are analyzed.According to the analysis results,suggestions for grounding mode of low-voltage system under typical connection modes of photovoltaic power plants and improvement measures for start-up procedure of optical differential protection device are put forward.

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