北京城北500kV变电站GIS系统的交流耐压试验

AC Voltage-withstand Test of GIS System at North Beijing 500 kV Substation

城北500 kV变电站GIS系统的交流耐压试验,根据GIS设备结构复杂、间隔数量众多、整体电容量较大等特点,合理选择了耐压设备组合方式来满足试验容量的要求,并采用了母线连同GCB单元整体加压的方法。既圆满完成了试验,又最大程度减少了试品的加压次数,从而降低了对试品的绝缘损坏。

The AC voltage-withstand test of GIS system at north Beijing 500 kV substation is characterized by complex structures of GIS equipment, many number of compartment and big capacity of integral capacitance. So it is necessary to select rationally the combination of the voltage-withstanding devices to meet the requirements for the test. A compression method applied on the bus with the integral GCB unit was adopted, which has completed the test and reduced the compression numbers on the samples to the maximum extent. As a result, the insulation damage on the samples was reduced.