高阻接地故障时消弧线圈并联小电阻接地的控制方法研究
中性点经消弧线圈并联小电阻接地方式可以实现自动熄弧与永久接地故障的可靠保护,兼具中性点经消弧线圈接地和经小电阻接地两种方式的优点.但在高阻接地故障时投切并联小电阻可能造成零序电压低于保护装置启动阈值,从而造成保护装置误动,甚至可能加剧故障.为此,提出一种高阻接地故障时并联小电阻投入的控制方法.首先,利用电力系统的基本原理分析了高阻接地故障时并联小电阻投入前后零序电流与零序电压的特征.其次,根据故障线路与非故障线路零序电流与零序电压夹角的异同提出并联小电阻装置退出的判据,据此也提出一种线路故障的保护方法.最后通过仿真验证了所提方法的有效性....
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Published in | 电力系统保护与控制 Vol. 49; no. 19; pp. 181 - 186 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | Chinese |
Published |
安徽电力调度控制中心,安徽 合肥 230022%上海蓝瑞电气有限公司,上海 201613%上海电力大学电气工程学院,上海 200090%上海思源电气股份有限公司,上海 201108
01.10.2021
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Subjects | |
Online Access | Get full text |
ISSN | 1674-3415 |
DOI | 10.19783/j.cnki.pspc.201415 |
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Abstract | 中性点经消弧线圈并联小电阻接地方式可以实现自动熄弧与永久接地故障的可靠保护,兼具中性点经消弧线圈接地和经小电阻接地两种方式的优点.但在高阻接地故障时投切并联小电阻可能造成零序电压低于保护装置启动阈值,从而造成保护装置误动,甚至可能加剧故障.为此,提出一种高阻接地故障时并联小电阻投入的控制方法.首先,利用电力系统的基本原理分析了高阻接地故障时并联小电阻投入前后零序电流与零序电压的特征.其次,根据故障线路与非故障线路零序电流与零序电压夹角的异同提出并联小电阻装置退出的判据,据此也提出一种线路故障的保护方法.最后通过仿真验证了所提方法的有效性. |
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AbstractList | 中性点经消弧线圈并联小电阻接地方式可以实现自动熄弧与永久接地故障的可靠保护,兼具中性点经消弧线圈接地和经小电阻接地两种方式的优点.但在高阻接地故障时投切并联小电阻可能造成零序电压低于保护装置启动阈值,从而造成保护装置误动,甚至可能加剧故障.为此,提出一种高阻接地故障时并联小电阻投入的控制方法.首先,利用电力系统的基本原理分析了高阻接地故障时并联小电阻投入前后零序电流与零序电压的特征.其次,根据故障线路与非故障线路零序电流与零序电压夹角的异同提出并联小电阻装置退出的判据,据此也提出一种线路故障的保护方法.最后通过仿真验证了所提方法的有效性. |
Author | 叶远波 徐波 魏立新 蔡翔 汪胜和 谢民 |
AuthorAffiliation | 安徽电力调度控制中心,安徽 合肥 230022%上海蓝瑞电气有限公司,上海 201613%上海电力大学电气工程学院,上海 200090%上海思源电气股份有限公司,上海 201108 |
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Author_FL | WANG Shenghe YE Yuanbo XIE Min CAI Xiang WEI Lixin XU Bo |
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Keywords | 消弧线圈;并联小电阻;高阻故障;单相接地故障 |
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Title | 高阻接地故障时消弧线圈并联小电阻接地的控制方法研究 |
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