The decoupled control of reactive power in medium/low voltage distribution networks including distributed generation

Aiming at the status that small distributed generation can´t be controlled uniformly, a decoupled control of reactive power in medium/low voltage distribution networks including distributed generation is proposed in this paper, based upon the analysis of the mechanism of power losses and voltage drop in distribution networks. The proposed method including the laddered control of distributed generators and low voltage capacitors, which can adapt to the time-variant loads of distribution networks according to the ladder diagram of power factor, and just need the related data of points of common coupling and the load side. Through the continuous power flow simulations of a distribution feeder with its loads data in some day, the results show that the proposed method performs excellently in reducing power loss, improving the voltage qualification rate and avoiding the frequent operation of reactive power compensators.