某35kV变电站2号主变非电量误动分析

Analysis of Non Electric Power Error of 2 Main Transformer in a 35 kV Substation

随着变压器保护类型的不断增加,非电量保护装置的故障率也逐渐增加。文章介绍了主变压器非电量保护的重要性、结构组成、工作原理及配置应用。并针对某35kV变电站10kV出线开关多次分合闸引起主变非电量保护误动造成2号变跳闸事件,详细分析了事故原因,得出的结论是重瓦斯保护中间继电器的启动功率过小,不能躲过10kV系统多次跳闸时的直流扰动。

With the increasing protection type of transformers,the failure rate of non electrical protection devices is also increasing.This paper introduces the importance,structure,working principle and configuration application of the main transformer non power protection.In view of the multiple switching of the 10 kV out switch of a 35 kV substation,the 2 change trip event caused by the misoperation of the main transformer non electricity protection is caused,and the cause of the accident is analyzed in detail.The conclusion is that the starting power of the intermediate relay in the heavy gas protection is too small and can not avoid the DC disturbance during the multiple trip of the 10 kV system.