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随着变电站用电负荷的不断增加,原变电站无功补偿容量固定无分级投切,另一方面无功功率变化较大不易补偿,现有无功补偿装置不能满足无功负荷变化要求,因此导致功率因数下降,35千伏线损升高,主变低压侧母线(10kV)低负荷阶段过补偿,无功倒送,高负荷阶段无功缺口大,加剧主变超载运行。已不能适应智能化电网的要求,满足不了全网或区域电网无功优化系统,效益下降。
With the increasing load of substation electricity, the reactive power compensation capacity of the original substation is fixed without classifying and switching, on the other hand, it is difficult to compensate for the large variation of reactive power, and the existing reactive power compensation device can not meet the requirement of reactive load change, The power factor drops, the 35 kilovolt line loss increases. The main transformer low-voltage side bus (10kV) over-compensates for the low-load phase and reloads the reactive power. The reactive power gap is high during the high-load phase, which aggravates the overload operation of the main transformer. Has been unable to meet the requirements of the smart grid, can not meet the whole network or regional grid reactive power optimization system, the benefits decline.