电力系统自动化2011，Vol.35Issue(15)：84-87,4.
变压器相间短路后备保护中负序阻抗继电器应用探讨
Application of Negative Sequence Impedance Relay in Backup Protection for Transformer Phase-to-phase Faults
贺元康 1赵鑫 1樊江涛2
作者信息
- 1. 西北电网有限公司调度通信中心,陕西省西安市710048
- 2. 大唐韩城第二发电有限公司,陕西省韩城市715400
- 折叠
摘要
Abstract
When the impedance relay with offset characteristic is applied to the backup protection for transformer phase-to-phase faults,its reliability and sensitivity always cannot meet the requirement.A negative sequence impedance relay（NSIR） is presented.Its measuring impedance is not dependent on phase shift of the Y,d connection of the transformer and it can lock effectively while line broken happened to potential transformer or current transformer.Simulink model used to verify performance of NSIR is built.Simulation results show that NSIR can act reliably when various phase-to-phase short circuit faults take place,and it also proves with an engineering practical example that NSIR is a sensitive and reliable backup protection for transformer phase-to-phase faults.关键词
负序阻抗继电器/变压器后备保护/偏移特性阻抗继电器Key words
negative sequence impedance relay/backup protection for transformer/impedance relay with migration circular characteristic分类
信息技术与安全科学引用本文复制引用
贺元康,赵鑫,樊江涛..变压器相间短路后备保护中负序阻抗继电器应用探讨[J].电力系统自动化,2011,35(15):84-87,4.
