In this paper a method to stabilize total output of PV systems by controlling on/off of each PV system is proposed. In the proposed method, the total output of PV systems is controlled so as to fit the output target value by determining off status of each PV system at each time interval when the amount of total power generation exceeds the output target value. Based on measured output of each PV system in instantaneos value, on/off status of each PV system is determined taking into account delay time of control. In order to check the validity of the proposed stabilization control method, the numerical simulations are carried out for a 100PV systems model. The effect of output fluctuation reduction is verified by changing the delay time of control. Furthermore, the utilization ratio and 30 minutes output deviation of PV systems are evaluated for various output target value.
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