A Coordinated Control Strategy for Flywheel Energy Storage Matrix System Based on Consensus Algorithm

Abstract

The randomness and fluctuation of renewable energy bring significant difficulties for operation and control of power grids. The flywheel energy storage system (FESS) provides a new solution in dealing with high frequency power fluctuation of renewable energy generation, due to its unique characteristics of fast dynamic response, long service life, unlimited charge/discharge times, and high power density. To consider the capacity requirement for power grid control in practical application scenarios, multiple flywheel energy storage units are usually integrated in parallel into the power grid, and the flywheel energy storage matrix system (FESMS) is therefore formed. In order increase the controllability of the FESMS integrated into the wind farm for practical application, this paper proposed a coordinated control strategy of the FESMS based on a consensus algorithm. By taking charge/discharge ratio of each flywheel energy storage unit as the consensus index and also coordinating the operation power of each unit in the FESMS by a distribution algorithm, the power fluctuation of the wind farm is smoothed. Finally, the effectiveness of the proposed control method is verified by simulation.