Variable charge/discharge time-interval control strategy of BESS for wind power dispatch

Authors : WEI CHAI, ZHENG LI, XU CAI

Pages : 1645-1659

View : 24 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A variable charge/discharge time-interval insert ignore into journalissuearticles values($T_{C/D});$ control strategy of a battery energy storage system insert ignore into journalissuearticles values(BESS); for wind power dispatch is proposed in this paper, aiming at: 1); extending the BESS life, 2); reducing the total BESS energy loss, and 3); increasing the dispatch tracking accuracy. A multifactor life model of a large-scale BESS containing four factors, charge/discharge rate, times, $T_{C/D}$, and temperature, is developed, which has taken into account the cell series/parallel effects and BESS operational characteristics. A comprehensive evaluation system including BESS aging level insert ignore into journalissuearticles values(BAL);, energy loss index insert ignore into journalissuearticles values(ELI);, and tracking inaccuracy index insert ignore into journalissuearticles values(TII); is proposed, and the relationships between $T_{C/D}$ and the three indices are discussed. In order to combine the advantages of low BAL and low ELI under long $T_{C/D}$ and low TII under short $T_{C/D}$, a fuzzy controller is designed to regulate $T_{C/D}$ in real time. The effectiveness of the proposed control strategy is verified by actual data from a wind farm in eastern China.
Keywords : Battery energy storage system, wind power dispatch, battery life, storage energy loss, fuzzy control