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Islanded Solar PV-BES-DG Set for Remote Areas

The diesel generator (DG) set is used to energize the load in remote areas. A battery energy storage (BES) integrated solar PV (Photovoltaic) system (SPVS) is presented in this work, to reduce the dependence on the DG set for power generation. The DG set operates only when the solar PV power and BES are not capable to supply power to loads. In a daytime, the power to loads is supplied by the solar PV array and BES. In the nighttime, the BES supplies power to loads until it discharges to its lower limit. The DG set is synchronized at the point of common coupling (PCC) only when both PV array and the BES cannot able to cope load demand and it always operates at its fuel economy zone (FCZ) to reduce the operational cost. An energy management strategy is developed to reduce the operating hours of the DG set and to reduce its unwanted switching. The SPVS also improves the power factor and power quality (as par IEEE std. 519) in a DG set. The seamless operation is incorporated in the control so that IEEE std. 1547 upholds when system changes its operating mode. Performance of this system is exhibited and validated through simulated results in a developed Simulink model.