摘要
介绍了变压器平衡绕组的作用,分析了一起比较少见的Yyn0+d连接组别的空冷电厂变压器平衡绕组短路引起差动保护动作的案例。对于变压器两侧电流转化计算,采用了一种快捷的计算方法,可准确判断故障所在位置,为故障处理奠定了基础。
The function of transformer balance winding was introduced.An infrequent short circuit fault of transformer balance winding was introduced.The transformer is installed in an air-cooled power plant and connected in mode of Yyn0+d,and the short circuit fault of its balance winding had caused the differential protection to trip.A new fast method was adopted for transformation and calculation of first and second currents of the transformer.The fault position can be determined correctly by the new method,which provides a base for the fault treatment.
出处
《华电技术》
CAS
2013年第7期53-55,78,共3页
HUADIAN TECHNOLOGY
关键词
变压器
平衡绕组
差动保护
短路简化分析
transformer
balance winding
differential protection
simplified analysis on short circuit fault
