750 kV电力变压器内部故障分析诊断与对策

介绍750 kV主变压器在运行中根据色谱分析以及轻瓦斯信号等,通过三比值判断为电弧放电故障,现场停运检查和返厂解体检查,对故障原因进行了分析,笔者针对局部放电监测的应用进行了介绍,提出针对大容量变压器可采用局放在线监测,提高运行的可靠性,同时对变压器安装、运行提出建议与对策。

Fault Diagnosis and Countermeasures of Internal Discharge in the 750 kV Transformer

Faults of the 750 kV main transformer can be identified by several means, judgment of the faults can be made identified based on chromatographic analysis and light gas signals, arc discharge is determined by three ratio, and the causes are analyzed by site outage check and returned for the disintegration. This paper introduces the application of partial discharge monitoring for the transformer. For large-sized transformers, the on-line partial discharge monitoring can be used to improve the operation reliability. Meanwhile, some related suggestions and countermeasures are proposed with regard to the installation and operation of transformers.