The research on power quality management technology of station area based on distributed photovoltaic scale access

Abstract

The intermittency, randomness and fluctuation of low voltage distributed photovoltaic power generation bring problems such as overvoltage, harmonic overlimit and reverse overload to rural distribution network, which seriously affect the power supply quality of low voltage distribution network. This paper mainly analyzes the power quality problems caused by large-scale distributed photovoltaic connected to rural distribution network, such as terminal overvoltage, transformer reverse overload, harmonic overlimit, and three phase unbalance. The power quality management strategy of low voltage station area based on distributed energy storage system is proposed, and the power quality management business module of low voltage station area is built based on the power information acquisition system to verify the reliability of the power quality management strategy of low voltage station area. The application effect of distributed energy storage system in controlling overvoltage, reverse overload and harmonic overlimit in low voltage station is verified through pilot construction.