电力系统保护与控制Issue(2)：1-5,5.
GIC引发直流偏磁对距离保护Ⅲ段动作性能影响的分析
Analysis of the effects on distance protection zone Ⅲ relays caused by DC bias induced from geomagnetic induced current
郑涛 1卢婷 1杨国生 2刘连光1
作者信息
- 1. 新能源电力系统国家重点实验室 华北电力大学，北京 102206
- 2. 中国电力科学研究院，北京 100192
- 折叠
摘要
Abstract
This paper describes the similarities and differences between the DC bias’ influences on transformers made by geomagnetic induced current (GIC) and HVDC in detail. Then the simulation of GIC is discussed and a simulation system is built based on PSCAD/EMTDC platform. Then the case of post-fault over load is simulated and the performance of distance protection is analyzed. The result demonstrates that when GIC invades power systems through transformers with neutral grounded the transformer core may become asymmetric saturated, which may cause the measured impedance in the state of cyclical fluctuations and distance protection zone Ⅲ which backs up for adjacent transformer is possible to mal-operate under the case of post-fault over load.关键词
地磁感应电流/直流偏磁/距离保护/事故过负荷/测量阻抗Key words
geomagnetic induced current (GIC)/DC bias/distance protection/post-fault over load/measured impedance分类
信息技术与安全科学引用本文复制引用
郑涛,卢婷,杨国生,刘连光..GIC引发直流偏磁对距离保护Ⅲ段动作性能影响的分析[J].电力系统保护与控制,2015,(2):1-5,5.
