The rbf network has a better performance, and better forecasting accuracy . then mathematical model of substation voltage / var control is constructed, the squares minimization of voltage differences as target, also considering requirement of voltage and power balance, taking it into consideration that the magnitude constraint of transformer ratio and compensating capacitor, also that constraint of operation times of one day transformer tap and capacitor switch 因此提高了学习性能,具有较好的预测精度。然后,建立变电站电压无功控制的数学模型,考虑电压的调压要求和无功功率平衡,计及变压器变比和并联补偿电容的上下限约束,变压器分接头和电容器允许的日调节次数的限制,以电压偏差的平方和最小为目标函数。