MZ变主变跳闸事件的故障分析与故障点查找

Fault analysis and fault localization of the main transformer trip event in MZ transformer station

电力系统的故障点查找,常常是在简单听取继电保护动作性质和测距后,由运行人员对保护动作范围内电力设备进行逐个排查为主的。这在一定情况下可以提高故障点的查找速度,但对于特殊故障,不进行故障信息的详细分析,常常会因为故障点查找针对性不强,而影响故障处理速度。因此建立在继电保护人员对故障信息进行详细分析基础上,及时指导进行的故障点查找极为必要。介绍了一起通过特殊的变压器跳闸事件,通过技术人员对故障报告的详细分析,指导查找故障点的实例。

The fault localization is searched from the power devices one by one in the scope of protection operation by power transformation operating personnel and power transmission line attendants, after the brief analysis of protection operation properties and ranging. In some cases, it will increase the search speed of fault localization, but in some special fault, because of the weak correlation with the fault localization it will affect the search speed if the detailed analysis is not established. So it is important to guide the fault localization based on the detailed analysis. This paper introduces an example of fault localization in an special main transformer trip event based on the detailed analysis.