부산대학교 도서관

Solar photovoltaic (PV) is becoming popular around the world for its decreasing cost and increasing efficiency. However, the high penetration of solar PV can bring several challenges to the power grid. Due to the intermittent characteristics of solar PV generation, voltage violation, as well as fluctuation can become major issues affecting the power quality of the grid. Volt-VAR control in the smart inverter is used to provide reactive power support to mitigate voltage violation and fluctuation issues. In this paper, a corrective mechanism updates the inverter’s reactive power set-point to concurrently mitigate voltage violation and fluctuation. The proposed "Delta-Q" approach is incorporated into the Volt-VAR control of the smart inverter. A modified IEEE 4 Bus system is utilized to validate the proposed control method. For real-time simulation, Typhoon Hardware In Loop (HIL) 402 series is utilized with real solar radiation and load data set. Furthermore, the control parts of the proposed Delta-Q approach are implemented using dSPACE MicroLabBox device. The results show the effectiveness of the proposed method in comparison with the traditional Volt-VAR control in mitigating voltage violation and fluctuation.