252 kV GIS局部放电实验仿真平台的设计

Design of the 252 kV GIS Partial Discharge Experimental Simulation Platform

气体绝缘组合电器(gas insulated switchgear,GIS)以其占地面积小、不受大气影响、可靠性高等优良性能在电力系统中的使用日益广泛,然而,GIS内部会出现由于绝缘缺陷引起的局部放电(partial discharge,PD),PD长时间发展会导致GIS绝缘损害,对PD进行检测显得尤为重要。文章主要通过对国内外GIS实验平台的调研,综合考虑了多种因素后,设计了252 kV的GIS局部放电实验仿真平台。整个实验平台高4 150 mm,长5 000 mm,带有一个长1 000 mm的T型分支腔体,腔体上带有观察窗和手孔,方便观察实验过程及放置实验模型,最后通过实验证实了该平台不仅可以模拟典型的绝缘缺陷,同时也可以方便的观察到整个实验过程。

Gas insulated switchgear（GIS）has excellent performances such as small area,not affected by atmosphere, high reliability. So it has been used more and more widely in the power system.However,the partial discharge would occur because of insulation defect, PD will lead to the GIS insulation damage after a long time, and will lead to serious consequences without treatment in time,therefore,the PD detection is particularly important. We have researched experiment platform of GIS at home and abroad.After considering the various factors in GIS experiment,we design the GIS model of 252 kV level,the entire experimental platform is 4 150 mm high,and 5 000 mm long,also has a 1 000 mm long T type branch cavity, the cavity with observation windows and a hand holes on it, which is convenient for experimental process observation and the experimental models placing, and we have tested the platform through experiments, this platform can not only simulate insulation defects,it can observe the whole experiment process. At the same time, the experimental signals can be extracted easily.