测量高压GIS站特定主设备回路电阻的方法

A Measurement Method for the Loop Resistance of Specific Primary Equipment in High-voltage GIS Station

工程上通常用直流压降法测量GIS(气体绝缘金属封闭开关设备)的回路电阻。在一些情况下,常规试验接线方法难以测得特定主设备的回路电阻值。通过对葛洲坝电站新建的二江220kV高压GIS站导电回路电阻测量试验研究发现,灵活运用直流压降法的原理,能够有效查找高压GIS设备导电回路电阻缺陷部位,能够创造条件测量强感应电下的导电回路电阻,也能够便捷测得整段超长母线回路电阻值。

The loop resistance of high-voltage GIS equipment is usually measured by DC voltage drop method. While in some cases, the loop resistance of some specific primary equipment could not be measured with the common wiring scheme. Several practical cases from Erjiang 220 kV high-voltage GIS station in Gezhouba Hydropower Station are discussed, in which the DC voltage drop method is used successfully to measure the loop resistance of several specific equipment, including the location of resistance defect elements, measurement of the conductive loop resistance with strong induction current, and measurement of the loop resistance of ultra-long busbar.