Novel Battery Management System of PV-Battery Based Standalone Power System

The paper presents an innovative Battery Management System (BMS) for a standalone power system based on a PV-Battery hybrid setup. As solar energy becomes more affordable, PV systems are increasingly being used to meet residential and agricultural power demands. However, these systems often face challenges due to unbalanced loads between single-phase and three-phase requirements, particularly with the use of induction motors for water pumping. To address this, the system employs a three-phase inverter to ensure stable AC power across diverse loads. A key focus is maintaining reliable power quality at the load bus under varying solar conditions and load imbalances. The proposed BMS integrates advanced control methodologies, including a 3DOF-PID controller, which outperforms traditional PI and Fuzzy controllers in achieving faster, more accurate responses. Additionally, the system utilizes a perturb and observe algorithm to optimize PV generator performance at maximum power. Hardware-in-the-Loop (HIL) simulations, performed using OPAL-RT modules, demonstrate the effectiveness of the proposed control strategies. The study highlights the critical role of adaptable, innovative BMS in enhancing the efficiency and reliability of PV-Battery standalone systems for both residential and agricultural applications.