Abstract
This paper reports the steady-state performance of a grid-connected photovoltaic-wind power system in a 20 kV active distribution system. The system was initially designed to meet a typical of State Electricity Company (Perusahaan Listrik Negara, PLN) primary feeder in Indonesia. In this study, 200 kWp solar power capacity and 200 kW wind power capacity were selected in the simulation of power flow analysis to evaluate the better system states. The results of the study using four cases show that the better voltage profile is obtained in conditions where the hybrid system is placed on the bus, which has the lowest voltage and on the load bus, which farthest from the source. The presence of power injection from solar and wind power plants on low voltage (LV) buses has reduced the active power flow from the grid utility. All load bus voltages have above 0.95 p.u in these cases, already within PLN standard. The lowest level of losses of 11 kW and 50 kVAr are obtained in the case where hybrid Photovoltaic (PV) and Wind Turbine (WT) with capacitor integration in the distribution network. Power losses are secured far below 10% as the losses permitted according to the PLN standard. Therefore, the integration of PV and wind turbine into a 20 kV distribution network can improve the voltage profile and reduce total system losses.
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