500kV自耦变压器零序过流保护的整定配合  

Settings Coordination of Zerosequence Over-current Relay for 500kV Autotransformer

作　　者：赵黎丽 高昌培 

机构地区：[1]贵州电力调度通信局,贵州省贵阳市550002

出　　处：《电力系统自动化》2010年第7期112-115,共4页Automation of Electric Power Systems

摘　　要：探讨了目前500kV自耦变压器零序过流保护时限的整定配合问题,着重提出了变压器220kV侧零序定时限保护动作时限与500kV侧和公共绕组侧零序反时限的配合方法,推导了需满足的2个不等式,同时提出了其在动态意义上配合的校核方法。通过对可能配置下的配合问题的分析,提出还需解决的问题。The existing settings coordination of time-limit for zero-sequence over-current relay of 500 kV autotransformer is discussed.The emphasis is laid on the coordination of zero-sequence definite time-limit over-current relays in middle-voltage（220 kV） winding with zero-sequence inverse time-limit over-current relays in high-voltage winding and common winding.Then two un-equations are derived according to the questions discussed.In the meantime the influence of dynamic changed zero-sequence fault current on the coordination,the check method for dynamic problem is analyzed.At last,an optional protection scheme of over-current relays in 500 kV autotransformer is discussed,and some problems to be solved are pointed out.

关 键 词：变压器保护 零序保护 反时限 过流保护 配合 

分 类 号：TM771[电气工程—电力系统及自动化]