The reactive power/voltage control is the effective method and important way to boost the voltage regular rate, decrease active power loss and enhance the stability of electric power system. With the rapid development of power system and the gradual opening of electric power markets, the traditional method based on the off-line data and the mode controlled by VQC separately can not meet the demands of the modern electric corporation in evidence. Therefore, it is great of impendency and necessary to develop the reactive power/voltage control system adapt to the situation of our country.Firstly, In order to resolve the problem of the surge and unnecessary action of adjustment for capacitor and transformer, and to extend service life of equipment, a system of on-line reactive power/voltage control strategy is designed based on the load forecast. Secondly, a method is proposed to improve the original BCC algorithm and apply it to solve the reactive power optimization of power system. Application of the system which shows effective result and guarantees the power grid operate safety and economically has significant theory worth and wide application perspective.
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