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基于有限交叠多分区的站域后备保护方案
马 静, 史宇欣, 马 伟, 王增平
华北电力大学 新能源电力系统国家重点实验室,北京 102206
摘要:
站域保护可方便获取站内电气量,因此提出一种基于有限交叠多分区的站域后备保护方案。根据作用域范围将站域划分为母线-线路融合区、母线-变压器融合区、多元件协同融合区3类有限交叠分区。根据各分区可能出现的故障情况,设计了每个分区的动作方案。当站域范围内发生故障且主保护拒动时,通过不同的有限交叠分区之间的协调配合,可选择性地快速隔离故障。实际变电站故障案例分析结果表明,该方案解决了传统阶段式后备保护动作时限长的问题,有效改善了高中低压元件的后备保护性能,简单灵活、可靠性高。
关键词:  继电保护  有限交叠  多分区  站域保护  故障分析  后备保护
DOI:
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基金项目:基金项目:国家重点基础研究发展计划(973计划)项目(2012-CB215200);国家自然科学基金资助项目(51277193);中央高校基本科研业务费专项资金资助项目(2014ZZD02);教育部留学回国人员科研启动基金资助项目(教外司留[2011]1139);中国电机工程学会电力青年科技创新项目(电机学[2012]46 号);国家电网公司资助项目(PD71-13-031);河北省自然科学基金资助项目(E2012502034);北京市科技新星支持计划(Z141-101001814012);北京市优秀人才支持计划(2013B009005000-001);霍英东教育基金资助项目(141057)
Substation backup protection scheme based on multiple limitedly overlapped divisions
MA Jing, SHI Yuxin, MA Wei, WANG Zengping
State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University,Beijing 102206,China
Abstract:
Since the electrical variables of substation can be easily obtained,a substation backup protection scheme based on multiple limitedly overlapped divisions is proposed,which divides the substation zone into multiple integration divisions based on three types:bus-line,bus-transformer and multi-component. Operation schemes are designed for each division according to its probable faults. When an in-zone fault occurs while the main protection does not act properly,the fault can still be isolated selectively and quickly by the coor-dinated actions among multiple divisions. The case analysis of an actual substation fault shows that,com-pared to traditional multi-stage backup protection,the proposed simple scheme has shorter time-limit and higher reliability,which effectively improves the performance of backup protections for HV and MV components.
Key words:  relay protection  limited overlapping  multi-division  substation protection  failure analysis  backup protection

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