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Optimization Control Strategies of Large Capacity Flywheel Energy Storage System |
Liu Xue1, Jiang Xinjian1, Zhang Chaoping2, Li Shengzhong2 |
1.State Key Lab of Security Control and Simulation of Power Systems and Generation Equipment Tsinghua University, Beijing 100084 China; 2.Zhongyuan Petroleum Engineering Company Limited Sinopec, Puyang 457000 China |
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Abstract The principle of bi-directional converter of the flywheel energy storage system (FESS) is discussed in this paper. Then the optimization control strategies of charging and discharging for FESS is presented, including improved multiple control strategy for charging and integrated optimization flux-weak control strategy for discharging which is used to solve the limits of the traditional control strategies. Then the system control scheme is given. Simulation and experiment analysis are executed. The results show that the proposed charging strategy fits well with the working pattern of flywheel, and switching from constant torque control to constant power control is quick enough; the discharging strategy can stabilize the DC-link voltage under any possible output power, so both strategies are effective and practical.
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Received: 08 November 2013
Published: 17 June 2014
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