Voltage Optimization Method of Distributed Photo-voltaic Power Supply Connected to the Distribution Network

Ning Zhang

College of Electrical Engineering, Qingdao University, Qingdao, 266071, China

Abstract: The traditional centralized power generation mode cannot improve the situation of low voltage at the end nodes of rural power lines in practical work, so a voltage optimization method for distributed photo-voltaic power supply connection distribution network is proposed. Firstly, the characteristics of the nodal distribution frame and the ｌｏａｄ value in each period are used to adjust the photo-voltaic osmosis ratio to ensure that the voltage fluctuation of the distribution network is not affected by other environmental factors. Secondly, the range of line characteristic parameters is expanded according to the ground state model. Finally, the voltage of distribution network is optimized according to the ｌｏａｄ level at a certain moment. It is proved by experiments that the voltage optimization method of distributed photo-voltaic power supply con-nected to the distribution network can ensure the voltage fluctuation of the distribution network at a normal level and improve the situation of low voltage at the end nodes of the agricultural network.

Keywords: Photo-voltaic osmosis ratio; Renewable energy; Production mode; Output power