Abstract This paper mainly researches the DC bus voltage control strategy during the discharge period of Flywheel Energy Storage System (FESS). Focused on the DC bus fluctuation caused by wide speed range and pulsed load current of FESS, an improved discharge control strategy with load current and rotor speed compensation is proposed to enhance the system adaption to speed variation and accelerate the voltage response at abrupt load change. The load current and rotor speed is compensated to the nonlinear outer DC bus voltage loop, and the reference value of q-axis current is recalculated according to the power balance between AC and DC side of the bidirectional converter. Feedforward decoupling strategy is also utilized in the inner current loop to realize the independent control of the d-axis and q-axis currents. Simulation results and experiment results are in reasonable agreement with the theory analysis, which verify the effectiveness and improvement of the proposed strategy.
张翔,杨家强,王萌. 一种采用负载电流和转速补偿的改进型飞轮储能系统放电控制算法[J]. 电工技术学报, 2015, 30(14): 6-17.
Zhang Xiang, Yang Jiaqiang,Wang Meng. An Improved Discharge Control Strategy with Load Current and Rotor Speed Compensation for Flywheel Energy Storage System. Transactions of China Electrotechnical Society, 2015, 30(14): 6-17.
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2015, Vol. 30 
