摘要
瓦斯保护是变压器的主保护之一,对变压器匝间和层间短路、铁芯故障、套管内部故障、绕组内部断线及绝缘劣化和油面下降等故障均能灵敏动作。以某电站550kV主变区外故障导致瓦斯动作事件为例,通过对事故原因的分析,提出在区外故障时应考虑瓦斯保护误动的可能性,并通过仿真计算,优化了瓦斯保护整定值参数。
The gas protection is one of the main protections in a transformer,which could be triggered sensitively by various faults such as the short circuit between transformer turns and layers,iron core fault,internal fault of the bushing,internal disconnection of windings,insulation deterioration and oil surface decline. A gas relay protection mis-operation of the 550 kV main transformer in a power station is analyzed. The results show that the gas protection could mis-operated due to external faults. Correspondingly,the setting parameters of the gas protection are optimized.
作者
李娟
LI Juan(Department of Mechanical and Electrical Engineering, China Three Gorges Corporation, Chengdu 610041 , China)
出处
《水电与新能源》
2017年第3期20-22,共3页
Hydropower and New Energy
关键词
瓦斯保护
误动
优化参数
gas protection
mis-operation
parameter optimization
作者简介
李娟,女,工程师,从事水电站电气设备的招标采购及技术管理工作.
