With the increasing proportion of renewable energy devices in the energy collection system, the uncertainty of photovoltaic and load pose power quality issues and challenges to the stable operation of the grid. The voltage and power compensation control of the system can be realized through energy storage access. First, the coupling influence mechanism between voltage and power is analyzed. Then, the series-connectded mode and the parallel-connectded mode energy storage are used to compensate the fluctuation of grid voltage and power through coordinated control. Finally, based on the coordinated control of energy storage, the capacity of energy storage equipment with different integration modes is optimized to meet the compensation requirements of energy collection system and ensure the stable operation of the system. The effectiveness of the proposed coordinated control and optimization design method is verified by simulation examples, which can reduce the total amount of energy storage and has practical application value.