Increasing integration of distributed generation (DG) based on renewable energy, such as photovoltaic (PV), is increasingly being implemented to improve the reliability of electric power distribution systems. However, DG penetration can affect the performance of the protection system, especially in managing three-phase shortcircuit fault currents. This study aims to analyze the influence of DG configuration and penetration rate on the protection system in the power distribution network, especially in the IEEE 13 Bus system. The method used is a numerical simulation in which one of the observed buses, bus 5, with the highest fault current, is selected, and a DG is inserted on buses with the lowest voltage, namely buses 2, 4, and 6. With the IEEE 13 Bus model, followed by an analysis of the fault current, voltage stability, and protection trip time for various configurations and penetration levels of DG. The results showed that the higher the DG penetration, the greater the fault current, which affected protection trip time and voltage stability. These findings suggest updating the protection scheme to account for the DG’s fault contribution and implementing stricter arrangements to optimize DG integration without compromising the reliability of the overall electric power distribution system.
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