Embodiment of the voltage fluctuation suppression device, a commercial power system of a first power system and a power generation apparatus equipped, and wherein in doing, the input and output of the associated power between the second power system performs the first power grid and the grid-a the time to reduce the voltage variation in the power system 1, the control unit inhibiting the art voltage fluctuation
Since such that the device is equal to the ratio of the real power and reactive power to the output, and the first power system to the second power system power effective power and the ratio of the reactive power flowing between the control, to measure the impedance of the power distribution grid rather, it is possible to actually operate and control the proper active power and reactive power to the distribution grid which is suitable to reduce the voltage variation of the power distribution grid.