Control of small-scale wind/diesel/battery hybrid standalone power generation system based on fixed speed generators for remote areas

In this paper control design for safe and effective operation of small-scale hybrid wind/diesel/Battery standalone power generation system (WT-DG HSPGS) employing fixed speed generators is investigated. To compensate the fluctuation of wind power, reduce the run-time of the diesel generator (DG), regulate the AC voltage and the system frequency, as well as, to improve the power quality at the PCC, STATCOM supported by battery energy storage system (BESS) is controlled employing synchronous reference frame (SRF) theory and estimated in-phase and quadrature unit AC voltage templates. To synchronize the DG to the PCC, breaker switch is controlled using the estimated voltage phase angle and the system frequency. To protect BESS from overcharging, dump loads is controlled using simple approach based on BESS limit charging voltage. To test the performance of the proposed WT-DG HSPGS and their developed control algorithms under presence of balanced/unbalanced, linear/nonlinear loads and change in climate conditions, simulations are carried out using MATLAB/Simulink.