Local Voltage Control Strategy in Grid Integrated PV-Battery Storage System /

Abstract

The emerging trend of green and affordable energy generation due to high electricity demand has led to excessive penetration of distributed energy resources in the LV (Low Voltage) side of the distribution grid. PV generation being intermittent in nature, its excessive integration causes a lack of voltage regulation, frequency deviation, reverse power flow, phase imbalance and power quality problems which renders the grid unreliable and unstable. In regard to the aforementioned issue, this thesis provides insight to enhance the PV hosting capacity of the grid while preventing voltage rise on the grid, due to active power injection, by integrating energy storage system and capacitor bank for harmonic filtration of the inverter. This study is carried out in MATLAB/Simulink by incorporating the MPPT Controller for PV based on the “Fuzzy logic” technique and control method for the voltage regulation. Peak Sharing strategies of battery energy storage and inverter with reactive power control framework were designed for the study. This methodology results in increasing grid flexibility and PV self-consumption.