摘要
Abstract
Aiming at the problem of 330 kV bus single phase short-circuit current to surpass switch rated interrupting current in ±660 kV Yinchuan Eastern converter station of Ningxia power grid, bases on main structure of 2014 and 2016 year Ningxia power grid layout,in order to effectively limiting short-circuit current,researches the current limiting effect at 750 kV main transformer neutral point which install small reactor in ±660 kV Yinchuan Eastern converter station,by calculating and analyzing power frequency overvoltage and current of reactor,and operation overvoltage and current of reactor,selects neutral point arrester parameters,puts forward power frequency overvoltage level and operation overvoltage level of main transformer neutral point reactor,selects dynamic and thermal steady current of reactor,confirms technological parameters of neutral point reactor. The result shows that 750 kV main transformer neutral point to install small reactor in ±660 kV Yinchuan Eastern converter station can effectively limit single phase short-circuit current of 330 kV bus.关键词
银川东换流站/单相短路电流/中性点/电抗器/过电压/绝缘Key words
Yinchuan East converter station/single phase short-circuit current/neutral point/reactor/overvoltage/insulation分类
信息技术与安全科学
