Research on the Improvement of Power Quality of Low-Voltage Power Grid Based on Back-to-Back Photovoltaic and Energy Storage Converter

Rural low-voltage power grid is relatively weak, and power quality problems such as low voltage often occur. This paper aims to solve the problem of power supply quality in low-voltage system and make full use of photovoltaic power generation energy. A comprehensive power supply quality improvement system based on back-to-back photovoltaic and energy storage converter is proposed, it can solve the problems of low voltage, harmonic, three-phase unbalance and low power factor, and can also make full use of photovoltaic power generation resources, and can effectively smooth load power fluctuation through energy storage. Simulation analysis and example verification show the effectiveness and generalizability of the research in this paper.