TV故障引起的发电机定子接地保护动作分析

Analysis on Generator Stator Earth Fault Protection by Voltage Transformer Fault

结合TV一次绕组匝间短路故障引起的发电机定子接地保护动作跳机实例,从发电机定子接地保护原理和TV绕组匝间短路故障数据两方面进行分析,认为TV一次绕组匝间短路引起的发电机定子接地保护动作属于正确动作,并介绍如何快速分析定位定子接地故障与TV绕组匝间短路故障的方法。

From one generator unit tripping event caused by inter-turn winding short circuit fault in generator voltagetransformer,the paper researches the principle of generator stator-earthing protection and TV windings fault event data, considers that the operation of the generator stator-earthfault protection is correct,and discusses the method how to identify the generator stator-earth-fault with the inter-turn winding short circuit fault in generator voltage-transformer.