The loss of output variation of such discrete reactive power devices as shunt capacitor switching and adjustment of on-load tap changer tap is much larger that such continuous equipment as generator unit and SVC etc.In this paper

starting from the point of reducing the comprehensive cost including network loss and equipment loss

a kind of reactive power voltage control coordination optimization strategy of network is proposed

and the corresponding calculation method based on the improved genetic algorithm is given.It is shown by the simulation contrast result on IEEE-14 node system that the proposed strategy is more reasonable than the traditional control strategy without consideration of the discrete reactive power devices loss.The proposed strategy

especially in case of network load periodic change

avoids effectively the repeated operation of the discrete devices.