浅谈变电站保护测相量

Discussion on Phase Measurement for Substation Protection

对于变电站保护而言,电流互感器与保护装置间接线正确与否十分重要。主要讨论带负荷测相量的相关问题,重点讨论了保护测相量过程中的3个重要内容:TA变比的正确性、电流相序的正确性、TA极性的正确性。同时也讨论了现场实际测量过程中,可能引起保护保护测相量不正确的相关因素。

For substation protection,the correctness of the indirect lines between current transformers and protection devices is crucial.This article mainly discusses the relevant issues of on-load phasor measurement,focusing on three important aspects in the process of protection phasor measurement:the correctness of TA transformation ratio,the correctness of current phase sequence,and the correctness of TA polarity.At the same time,the relevant factors that may cause incorrect phase measurement of protective protection during the actual on-site measurement process were also discussed.