基于电磁式电压互感器的GIS耐压试验装置设计与开发

Design and Development of GIS Withstand Pressure Test Device based on Electromagnetic Voltage Transformer

处于地下涵洞等狭窄空间内的GIS在进行交流耐压试验时,由于所处空间狭小,无法使用串联谐振或者交流试验变压器等大型设备对其进行交流耐压试验,设计一套基于电磁式电压互感器的交流耐压试验装置,用于220 kV及以下狭窄空间内的小型GIS耐压试验,试验装置将电磁式电压互感器做成标准工装安装在GIS上,对电压互感器的二次侧进行加压,在其一次侧感应出交流高压完成对GIS一次回路的感应耐压试验。结果表明:试验装置能够产生频率可变的交流电压输出,并且装置带有低压补偿电抗器对电压互感器的未加压绕组进行补偿,装置以很小的体积和重量完成电压互感器及狭窄空间内GIS母线的感应耐压试验。

When the AC withstand voltage test is carried out to GIS in a narrow space such as the underground culvert, series resonance or testing transformer and other large equipment could not be used for the test. A set of ac withstand voltage test device is designed based on electromagnetic voltage transformer for 220 kV and below GIS in the narrow space. The electromagnetic voltage transformer has been made to a standard equipment installed on the GIS by the test device. In the primary loop induction pressure test of the GIS, voltage load on the secondary side of the voltage transformer, and ac high voltage will be induced at the primary side. The results show that the test device can produce variable frequency ac voltage output, and a low voltage compensation reactor pressure winding in the test device can compensate the voltage transformer.