【摘要】 由于目前GIS现场冲击耐压试验中出现了一些问题,人们对大型GIS设备冲击耐压试验采用振荡雷电冲击波与标准雷电冲击波时GIS内部各节点的作用电压和电压分布情况以及两种试验波形下的耐压考核等价性等问题提出了质疑。从过电压的角度,利用数值仿真软件ATP-EMTP,模拟现场试验对某550 kV GIS设备分别施加振荡雷电冲击波与标准雷电冲击波两种电压波下GIS中波的传播情况和各节点可能出现的最大电压值进行了仿真计算分析,并对两种电压波作用下的节点电压进行了比对分析,同时对现场试验中出现的盆式绝缘子闪络短路故障做了模拟计算分析,得出的仿真分析结论与现场试验结果十分吻合,为进一步完善现场试验方法,修订试验标准提供参考依据。更多还原

【Abstract】 Because some problems exist in on-site impulse withstand voltage test of GIS, people cast doubt on the distribution of voltage on the nodes inside GIS induced by oscillatory lightning impulse or standard lightning impulse, and question the equivalence of the withstand voltage tests with above two impulses. In this paper, from the view of over-voltage, the numerical simulation software ATP EMTP is adopted to simulate the wave propagations in a 550 kV GIS under the two lightning impulses, the maximum voltages on internal nodes induced by the two impulses are obtained and compared, and the flashover fault of basin insulator in on-site testing is analyzed. Simulation results are consistent with those from the on-site testing. This study may provide a reference for revising the corresponding test standard and on-site testing methods.更多还原