摘要
为检验新建GIS(气体绝缘封闭金属开关)设备是否具备投运条件,目前有效的方式是对其进行现场交流耐压试验。但对双母线接线的变电站而言,由于运行母线与试验间隔之间仅通过母线隔离开关断开,在间隔扩建或检修后的耐压试验过程中,母线隔离开关断口承受的电压为试验电压与母线运行相电压之差,如果试验电压与运行相电压相位反相达到180°时,就可能出现断口击穿进而危及GIS运行设备的情况,这将给供电可靠性带来极大的影响。基于以上问题,笔者以EMTP-ATP为仿真工具,通过建模和仿真分析了扩建的GIS设备间隔带电进行交流耐压试验过程中,母线隔离开关断口上出现极端击穿电压的情况下对GIS设备以及试验设备的影响,同时提出了解决措施,对于解决GIS设备扩建或检修间隔后的不停电交流耐压试验具有较强的参考意义和重要的推广应用价值。
At present, in order to test the new GIS （gas insulated switchgear） before into operation, the most effective way is the on-site AC withstand voltage test. But for the double busbar substation, the hying busbar and the tests interval is only isolated by the isolating switch. So during the AC withstand voltage test after the GIS expansion or maintenance, the voltage between the isolating switch of bus is the difference of testing voltage and operating voltage of the bus. In the case of the extreme condition which the difference of phase between the testing voltage and the running voltage up to 180 degrees, it is possible to occur the isolating switch breakdown and this will give a tremendous impact on the reliability of the power supply. To solve the above issues, in this paper, the EMTP-ATP is to be as a simulation tool to analyze the impact on the GIS equipment in the case of the above extreme condition. Meanwhile the measures to protect the over-voltage and the over-current protection, which will have practical references and engineering apphcation to the on-site AC withstand voltage test without power cut of the GIS equipment after its expansion or maintenance.
出处
《高压电器》
CAS
CSCD
北大核心
2013年第4期98-104,共7页
High Voltage Apparatus
