110kV变压器中性点取消独立间隙电流互感器分析

Analysis on Canceling the Independent Clearance Current Transformer in 110kV Transformer Neutral Point Protection

110kV电网中,主变中性点保护广泛采用由零序电流互感器与间隙电流互感器为基础构成的中性点零序保护和间隙保护。本文分析了这两种故障情况及保护的原理和实现过程,探讨取消独立间隙电流互感器的可行性。

In 110kV grid, neutral zero sequence protection and clearance protection based on zero sequence current transformer and the clearance of current transformer is widely used for the protection of main transformer neutral point. This paper analyzes the two faults and the principle of protection and the realization process, and discusses the feasibility of canceling the independent clearance.