电力系统自动化2017，Vol.41Issue(19)：135-139,5.DOI:10.7500/AEPS20170104001
基于多维度相互校验的线路电流差动保护自校正同步策略
Multi-dimensional Cross-checking Based Self-correcting Synchronization Strategy for Line Current Differential Protection
徐晓春 1裘愉涛 2赵萍 3徐华 3李皓 3周再兵3
作者信息
- 1. 南京南瑞继保电气有限公司,江苏省南京市211102
- 2. 国网浙江省电力公司,浙江省杭州市310007
- 3. 国网浙江省电力公司台州供电公司,浙江省台州市318000
- 折叠
摘要
Abstract
In view of the inner-clock synchronization method normally used in the line current differential protection,the possibility of differential protection mal-operation is analyzed when there is an inconsistence of the sending and receiving routing in measuring the channel delay based on the Ping-Pong theory.By combining the synchronization criteria of the electrical variables on both sides of the line,an adaptive abnormal differential current monitoring method is proposed for identifying the synchronization abnormality in the line current differential protection.A self-correcting synchronization strategy is then given which combines the inner-clock system,external clock system and electrical variables criteria.The strategy is able to automatically realize the synchronization status identification and improve the capability in solving the routing inconsistency of differential protection.Testing results show that the proposed multi-dimensional cross-checking based self-correcting synchronization strategy can increase the robustness of line differential current in the routing inconsistency situation.关键词
差动保护/内部时钟/外部时钟/自校正/通道路由不一致Key words
differential protection/inner clock system/external clock system/self-correcting/routing inconsistency引用本文复制引用
徐晓春,裘愉涛,赵萍,徐华,李皓,周再兵..基于多维度相互校验的线路电流差动保护自校正同步策略[J].电力系统自动化,2017,41(19):135-139,5.
