STABILITY IMPROVEMENT OF GRID CONNECTED PV SYSTEM USING BATTERY

Sanju Hussain, Devanand C N

Abstract: The battery storage and time based tariff are not introduced in our country yet. This paper proposes a new multi stage converter topology intended for single phase grid connected PV system with battery storage. Also focuses on incorporating optimized energy storage to minimize cost of investment and losses. The system works on different modes of operation depending on solar, load, grid and battery profiles. The voltage control is implemented using load angle control of inverter current. In order to eliminate the grid connected current distortion caused by phase error; the phase compensation and PR controller strategy are employed in current control loop to improve the traditional proportional integration controller. The simulation results shows that the output current zero crossing distortion is eliminated and the power factor has improved by the performance of load angle control.

Keywords: Stability, Battery Optimization, Power Factor

DOI: https://doi.org/10.15623/ijret.2018.0705007