Analysis of a Relay Protection Responding to 220kV Transmission Line

作者：Huidong Guo, Zhenguo Ma, Mengqiong Wang · 年份：2019 · DOI：10.1109/isgt-asia.2019.8881143 · 研究领域：Power Systems Fault Detection、High-Voltage Power Transmission Systems、HVDC Systems and Fault Protection

The paper introduces an accident of line protection action caused by disconnecting switch fault. According to the time sequence of the line relay protection action and the principle of protection action, this paper makes a detailed analysis of the line protection action. According to the impedance distribution of grid, the reason why one side of the zero-sequence protection does not work is explained in detail by calculating the zero-sequence voltage when the fault occurs. At the same time, the reason why Substation side of line protection did not receive the remote breaking was explained.