并联无功补偿对大型变压器低压母线带负荷能力的影响

Impact of parallel reactive compensation on load carrying capacity of low-voltage busbar of large transformer

电力变压器低压母线侧的感性负荷及限流电抗器使得系统有较多的无功损耗,并联电容无功补偿可以降低该无功损耗,减小低压母线的电压偏移.基于这一原理对某典型变电站的主变低压母线带负荷能力进行了理论分析和数值计算.结果表明,低压母线并联电容无功补偿可显著提高大型变压器的带负荷能力,维持良好的母线电压质量.

Both current-limiting reactor and inductive load of low-voltage busbar of typical large transformers will result in major reactive power loss.However,the parallel reactive compensation can reduce the reactive power loss and the busbar voltage deviation.Basing on this principle,the load carrying capacity of low-voltage busbar of typical large transformers is theoretically analyzed and numerically calculated.The results show that the parallel reactive compensation can significantly improve the load carrying capacity of low-voltage busbar and maintain the good quality of busbar voltage.