串并联谐振在750kV GIS特长母线交流耐压试验中的应用

Application of Series Parallel Resonance in AC Withstand Voltage Test of 750 kV GIS Extra-long Bus

以750 kV GIS特长母线为研究对象,介绍了交流耐压试验的原理。结合现场试验经验,分析了基于串并联谐振原理的检测系统中各设备的具体参数,建立了750 kV GIS特长母线交流耐压的检测系统,并成功应用于750 kV GIS特长母线现场安装完成后的绝缘性能检测。通过实例顺利验证了试验方法的正确性,有效地检验了设备内部绝缘状况,为今后进行GIS特长母线现场交流耐压试验提供了参考。

Taking the 750 kV GIS extra-long bus as the research object,the principle of the AC withstand voltage test is introduced.Combined with the field test experience,the specific parameters of each device in the detection system are analyzed based on the principle of series-parallel resonance.The AC withstand voltage detection system of 750 kV GIS extra-long bus is established and successfully applied to the insulation performance detection after the field installation of 750 kV GIS extra-long bus.The correctness of the test method is successfully verified through an example,and the internal insulation condition of the equipment is effectively tested,which provides a reference for the field AC withstand voltage test of GIS extra-long bus in the future.