变电所电源的快速切换

常州地区220kV电网分为2个分区,2个分区电网在正常方式下无电气联系。常州地区部分110kV变电所的2路进线电源来自不同分区,当合环电流大于600A时,会给运行方式的调整带来困难。提出利用快切装置进行程序化操作解决环流影响的方案。介绍了电源快切装置在操作过程中的操作模式、允许合环时间、合环前的条件、合环后方式判别及其他情况等关键技术,并提出了运行中变电所进行快切装置改造及调试的方法与要求。

Fast transfer of substation power supply

Changzhou 220 kV network is divided into two divisions and they have no electrical connection in normal operating mode.Two feeders of some 110 kV substations in Changzhou are from different divisions,which make the operating mode adjustment more difficult when loop current is over 600 A.A scheme of programmed operations using fast transfer equipment is put forward for it.The key techniques used in transfer equipment are described,such as operating modes,allowed close-loop duration,conditions before close-loop operation,mode determination after close-loop operation.The requirements and methods of fast transfer equipment retrofitting and commissioning in operating substations are presented.