Capacity allocation of DSTATCOM adapting to renewable energy generation in distribution networks

YANG Yuyao1, ZHANG Yongjun1, HUANG Xiangmin2

(1.School of Electric Power, South China University of Technology, Guangzhou 510640, China;
2.Guangzhou BENLIU Electrical Technology Co., Ltd., Guangzhou 510640, China)

Abstract: Aiming at the problems such as voltage fluctuation that result from the uncontrollability and randomness of renewable energy which was connected to electric power girds by means of distributed generation, a capacity allocation method of DSTATCOM adapting to renewable energy generation was proposed in this paper. This method was based upon the mechanism analysis of voltage drop and sensitivity analysis of distribution feeder parameters and targeted at preventing the maximum voltage fluctuation. The recommended range of capacity allocation was summarized in the case of lack of data and a capacity allocation formula of DSTATCOM was achieved through unifiedobjective multiplelinear regression. Taking the actual urban and rural distribution feeders as examples, the results of simulation indicate that the proposed method is effective and it can calculate the reasonable capacity of DSTATCOM which can exactly prevent the maximum voltage fluctuation produces by renewable energy generation.

Key words: distribution network; renewable energy; distribationstatic synchronoas compensator(DSTATCOM); reactive capacity allocation; voltage fluctuation