电力系统保护与控制2011，Vol.39Issue(1)：128-131,4.
500 kV变压器中压侧及220 kV出线零序过流保护配置及整定方法研究
Research on the configuration and the setting method for the zero sequence overcurrent protection at the middle-pressure side of the 500 kV transformer and in the 220 kV outgoing line
彭海平1
作者信息
- 1. 贵州电力调度通信局,贵州,贵阳,550002
- 折叠
摘要
Abstract
According to analysis on the setting method for zero-sequence overcurrent protection of 500 kV transformer with 500 kV outgoing line and 220 kV outgoing line in this paper, it is found that the configuration and the setting of zero sequence overcurrent protection at the mid-voltage side of the 500 kV transformer is difficult and can cause relay protection skip action.Based on the analysis, this paper puts forward one new project.This project uses inverse-time zero-sequence overcurrent protection instead of no-direction definite-time of overcurrent protection at the mid-voltage side of 500 kV transformer.This project also uses inverse-time zero-sequence overcurrent protection instead of definite-time protection of high resistance section in 220 kV outgoing line.Application shows that this project can solve setting coordination and prevent the incorrect action of zero-sequence overcurrent protection of the 500 kV transformer under the grounding fault of outgoing line and make sure the safe operation of the power system.关键词
500kV变压器/中压侧零序过流保护/零序反时限保护/配置/整定Key words
500 kV transformer/ zero-sequence overcurrent protection at mid-voltage side/ inverse-time zero-sequence protection/configuration/ setting分类
信息技术与安全科学引用本文复制引用
彭海平..500 kV变压器中压侧及220 kV出线零序过流保护配置及整定方法研究[J].电力系统保护与控制,2011,39(1):128-131,4.
