Study On The Method Of Reactive Compensation In View Of The Distribution Network

With the growth of the national economy and improving the people's living standard, there is a growing demand for electricity. However, because of the distribution network without adequate reactive compensation and its construction relatively backward, voltage drops in the quality and the energy loss increases. Therefore, research on the rational allocation of compensation in distribution network, including selection of appropriate compensation site and suitable compensation capacity, has a certain theoretical and practical significance.This article proposes a method of reactive compensation based on combine of the flow calculation and reactive quadric accurate moment in view of the 10KV distribution network. Because of actual operation of the distribution network, the relative centralization of compensation and three load's ways which are the maximal, the minimum and the general one are considered. Under the minimum and the general load's ways, initial compensation scheme, included initial compensation sites and their capacities, is decided with the methods of the conventional flow calculation, reactive quadric accurate moment and the two unifications for the purpose of decreasing the net loss. According to the voltage profile under the maximal load's way, the initial compensation scheme is adjusted to improve the voltage qualified rate of the maximal load's way. Through the iteration, the overall voltage qualified rate achieves to conform with the request. On the one hand this method increased the computation precision,On the other hand reduced the computing time.It's tested on experimental systems of 19-node and 43-node distribution lines, and the results are satisfying, which confirm the reasonableness, convenience and practicality of presented method.