交流滤波器差动保护误动作的原因分析及对策

Analysis and Improvement Measurement of a Mal-Operation of Differential Protection for AC Filter

分析了交流滤波器差动保护误动作的原因,提出了改进措施。对故障录波数据进行了仿真分析,针对差动保护装置中的I/V变送器进行了电磁兼容试验,分析得出I/V变送器抗干扰性能差是造成差动保护误动作的主要原因。针对交流滤波器差动保护抗干扰性能差的问题,从硬件和软件两个方面提出了相应的改进措施。

A maloperation of AC filter differential protection is analyzed and corresponding solution is presented in this paper.Fault recorded data from the AC filter differential protection are simulated,EMC test for I/V converter of the protection is carried out.This paper comes to the conclusion that the main reason of the protection maloperation is the poor anti-jamming performance of I/V converter.Then some suggestions are given on how to improve the relay protection performance from software and hardware.