中文摘要：

为抑制特高压气体绝缘组合电器（GIS）设备中特快速暂态过电压（VFTO）提出了采用磁环抑制的方法,并进行了模拟试验。利用252kV GIS设备构建试验系统,利用SF6气体间隙在50、75和100kV的电压等级下击穿产生高陡度的行波,测试了不同长度的R2KB铁氧体磁环串和FJ37非晶磁环串对电压行波幅值和陡度的抑制效果。试验表明,只要磁环串的长度〉0.5m,其对于电压行波幅值的抑制效果将不再随磁环串长度的增加而发生显著变化,但行波上升时间将随磁环串长度的增加而增加;在磁环串长度≥1m的情况下,铁氧体磁环对于电压行波的综合抑制效果优于非晶磁环。试验表明,采用磁环抑制特高压GIS中VFTO的方法在原理上是可行的。

英文摘要：

An approach for suppressing VFTO in UHV GIS with magnetic-rings was presented,and a series of simulation tests were carried out.The test system was constructed with a 252 kV GIS,and travelling wave with high steepness was generated by a SF6 gas gap.The tests under 50 kV,75 kV and 100 kV were implemented to verify the suppression effects of R2KB ferrite and FJ37 amorphous magnetic-rings with different length to the amplitude and steepness of the voltage traveling wave.The tests results show that the suppression effect on the amplitude of the voltage travelling wave will not remarkably change when the length of the magnetic-rings is not shorter than 0.5 m,while the steepness will decrease along with the increase of the length of the rings.The ferrite rings have a better suppression effect than amorphous ones when the length of the magnetic-rings is not shorter than 1 m.The tests results indicate that it is feasible in principle to suppress VFTO in UHV GIS with magnetic-rings,and ferrite rings should be preferentially selected.