Dual-Mode Power Control of a Battery Supported Hybrid Power Generation System Based on Maximum Versoria Criterion

Abstract

The intermittency management plays a key role in enabling increased penetration of renewable energy sources (RESs) in modern power systems. In this context, this work presents the control of a battery supported hybrid power generation system (HPGS), integrating wind and solar renewable resources. The charging discharging of the battery energy storage (BES) for intermittency management is indirectly monitored through control of grid currents. The current control is performed for two operating modes: constant grid power control mode and variable grid power control mode. A maximum Versoria criterion based adaptive scheme facilitates the generation of reference grid currents. Moreover, the grid interactive system compensates for the reactive power requirement as well as harmonics and unbalance currents of loads, connected at point of common intersection (PCI) with the HPGS. An electromechanical wind energy conversion is performed using a doubly fed induction generator (DFIG). A position sensor-less rotor phase locked loop (RPLL) based scheme and a drift-free perturb and observe scheme (DFPO) are utilized for extracting peak powers from DFIG and solar photovoltaic (PV) array, respectively. The HPGS is modelled in MATLAB platform and obtained results demonstrate the appropriate working of the presented control schemes.