Accordingly , using graph theory and operating experience abroad for reference , it firstly brings forward a new method of voltage rectification which based on pilot bus with voltage control area in view of the weak coupling among every vca ( voltage control area ) , using decomposing method of multi critical value , it realizes the eliminating vinculum of every vca . and then , the rectification starts by pilot bus voltage of every vca . so the resolution of whole power net is diverted into calculating smaller sub - net 由于各个电压控制区之间无功电压的弱耦合性，利用多阀值分解的分区算法，实现区域间的解耦，然后根据各个子网络的主导节点的电压进行校正，从而把求解整个网络的问题转化为求解各个小的子网络，降低了网络维数，减少了无功设备控制动作次数，提高了校正成功率，缩短了计算时间。
