模拟气体绝缘组合电器产生不同局部放电的试验装置研制

Study on the testing device for simulating the partial discharges of different defects in gas insulated switchgear

针对现有直线型气体绝缘组合电器(GIS)局部放电模拟实验装置的不足,研制了一种可变结构的GIS模拟实验装置,可方便地实现对T型、L型和直线型GIS结构的模拟。通过超高频电磁波传播特性和材料应力分析,给出了装置的结构尺寸和材料选择参数,从进行的单一和多缺陷产生的局部放电试验表明,该装置能够激发出不同绝缘缺陷产生不同频段的超高频TE波和TM波局部放电信号,且具有各自特点和差异,这为深入研究GIS不同绝缘下产生的局部放电电磁传播特性、产生条件、超高频检测方法以及缺陷辨识等提供了可靠地实验研究手段。

To overcome the shortage of existing experimental device for partial discharges in gas insulated switchgear（GIS）, an installation for testing PD in GIS with multi structures is designed, which can simulate T type, L-type and line-type configurations of GIS expediently. The physical dimension and material parameter are given by calculating the characteristic of the propagation of ultra-high frequency electromagnetic waves and the stress of materials. The experiments under single defect and multiple insulation defects are carried on by using the designed 4 physical models of typical insulated defects for GIS. The results show that the built device can simulate the PD, TE mode and TM mode waves with different wave bands in GIS. The system makes a foundation for the further investigation of the electromagnetic waves propagation, the conditions of generating electromagnetic waves, testing method and pattern recognition of the PD in GIS.