针对配电网运行的辐射型结构 ,在配电网无功优化的无功近似矩模型基础上 ,提出了无功精确矩概念 ,根据无功二次精确矩选择最优补偿点 ,无功一次精确矩确定所应投放的优化容量。本方法在实验系统上进行验证 ,结果表明 :无功精确矩法无论对于降损还是改善电压水平 ,其效果比无功近似矩更为显著 Based on the reactive power approximation moment model of reactive power optimization in distribution network, this paper proposes the concept of reactive power exact moment, selects the optimal compensation point according to the reactive second accurate moment, The exact moment determines the optimum capacity that should be served. The method is validated on the experimental system. The results show that the reactive moment method is more effective than reactive moment of approximation for reducing or improving the voltage level