摘要
在220kV变电站开展数字化改造过程中的技术难点是在不影响运行设备的前提下接入新设备,如电子式电流互感器、电子式电压互感器等,而要解决这个问题需要解决母线差动保护改造及试验、旁路代主变压器运行、电压互感器并列、线路纵差保护的电流相位差和智能操作箱改造等问题。以220kV三乡变电站数字化改造实际工程为例,提出了一套可行的解决方案。
It is indicated that the technical difficulty in digital reconstruction of 220 kV substation is how to connect such new installations as electronic current transformer （ECT） and electronic voltage transformer （EVT） without affecting the operating equipment, which necessitates the solution of problems including transformation and test of bus differential protection, substitution of bypass for main transformer operation, paralleling of voltage transformer, current phase difference of line longitudinal differential protection, and modification of intelligent operating unit. A viable solution is proposed citing the engineering practice of digital reconstruction in 220 kV Sanxiang Substation for instance.
出处
《广东电力》
2010年第2期60-63,共4页
Guangdong Electric Power
关键词
数字化变电站
电流互感器
电压互感器
电子式电压互感器
digital substation
current transformer （CT）
voltage transformer （VT）
electronic voltage transformer
