In order to improve the power quality at the end of a distribution network and enhance the voltage stability of the parallel grid, this paper proposes an active voltage support control strategy based on a distributed photovoltaic/ flywheel energy storage combined generation system. Compared with the traditional voltage regulation control method, the control strategy can give full play to the high frequency charging and discharging characteristics of flywheel energy storage, adjust the active/reactive power output of the combined generation system adaptively according to the magnitude of voltage deviation, and stabilize the grid point voltage. At the same time, the control strategy takes the power factor of the grid point as a consideration, and introduces a control algorithm, which can be used in the same power control. The power factor of the parallel dot is optimized. In order to verify the feasibility of the proposed control strategy, a set of experimental test platforms including 50 kW photovoltaic and 100 kW flywheel energy storage is built. The experimental results show that the distributed photovoltaic/flywheel energy storage system can automatically adjust the active/reactive power output according to the voltage fluctuation, and improve the power quality of parallel outlets. This work is supported by the National Key Research and Development Program of China (No. 2018YFB0905500).