新疆某水电站220kV出线间隔电流互感器之探究

新疆某水电站装有4台单机容量为80 MW的立轴混流式水轮发电机组。采用发电机与变压器组成带有发电机断路器的单元接线,装置2台容量为100 MVA的220 kV双卷主变压器和2台容量为100 MVA的220 kV三卷主变压器。电流互感器是利用变压器原理进行变换电流的一次电气设备,它的主要作用是将高压小电流和低压大电流变成低压小电流,因而在电力系统中得到了广泛的应用。重点阐述了电流互感器基本原理,电流互感器二次回路现场试验原则及使用注意事项。

Xinjiang 220 kV Hydropower Station Line Inquiry Interval Currenttransformer

4 stand-alone capacity of 80 MW vertical mixed-flow water turbine generators are installed in a hydropower station. The generator and transformer unit wiring with generator circuit breaker,unit 2 sets of 100 MVA 220 kV capacity double winding transformer and 2 sets of 100 MVA 220 kV three winding transformer. The current transformer is an electrical equipment for transformation of the current transformer usingprinciple,its main role is to transform high voltage small current and low voltage high current into low voltage small current,so it is widely used in electric power system. This paper describes the basic principle of the current transformer and the test principle of two circuit current transformer on-site and the matters needing attention.