期刊论文

CT polarity checking method for line protection based on no-load charging transient current

中文

电力系统保护与控制

1674-3415

2023

51

12

99-108

10.19783/j.cnki.pspc.221418

国家自然科学基金项目资助(52007010)~~；

本校为其他机构

线路保护电流互感器(current transformer, CT)二次采样回路接线正确是保护正确动作的前提。针对线路投运启动过程中保护CT极性校验困难的问题,首先分析了在有限负荷和无负荷下利用线路稳态电流进行极性校验的...展开更多 线路保护电流互感器(current transformer, CT)二次采样回路接线正确是保护正确动作的前提。针对线路投运启动过程中保护CT极性校验困难的问题,首先分析了在有限负荷和无负荷下利用线路稳态电流进行极性校验的边界限制条件。进而针对不满足限制条件下无负荷极性校验困难的问题,提出了一种基于空充暂态电流的线路保护CT极性校验方法。该方法先利用幅值较大的本端暂态电流对三相...

The correct wiring of a line protection current transformer(CT)secondary sampling circuit is a precondition for correct protection operation.There is difficulty in polarity checking during the operation and start-up of the line.Thus the boundary limit condition of the p...MORE The correct wiring of a line protection current transformer(CT)secondary sampling circuit is a precondition for correct protection operation.There is difficulty in polarity checking during the operation and start-up of the line.Thus the boundary limit condition of the polarity checking using the steady-state current of t...