平抑間歇性電源功率波動的混合儲能控制研究
周福舉，張宸宇，鄭建勇，鄧凱
東南大學 電氣工程學院，江蘇 南京 210096
摘 要：針對間歇性電源輸出功率波動大、隨機性強的特點，提出了一種基于混合儲能平抑間歇性電源功率波動的控制方法。該方法將功率密度大、動態響應速度快的超級電容作為系統緩沖儲能優先對功率波動進行平抑，通過蓄電池組的功率調節以防止超級電容電壓越限；將蓄電池組分為獨立的充電組和放電組分別控制，最大限度的減少蓄電池組循環充放電次數；通過基于荷電狀態的蓄電池充電組和放電組相互調整規則以避免蓄電池組深度充放電，延長其使用壽命。仿真驗證了該方法的有效性。
關鍵詞：間歇性電源；混合儲能；超級電容；蓄電池
中圖分類號：TM912 文獻標識碼：A 文章編號：1007-3175(2014)10-0011-04
Research on Control Method of a Hybrid Energy Storage System for Smoothing Power Fluctuations of Intermittent Power Sources
ZHOU Fu-ju, ZHANG Chen-yu, ZHENG Jian-yong, DENG Kai
College of Electrical Engineer, Southeast University, Nanjing 210096, China
Abstract: According to the large fluctuations and strong randomness of the output power of intermittent power sources, this paper proposed a control method based on hybrid energy storage to smooth power fluctuations of intermittent power sources. Supercapacitors could be used as the buffer energy storage to smooth power fluctuations with priority because they had large power density and fast dynamic response. The terminal voltages of supercapacitors were controlled within limits by power adjustment of battery. Battery was divided into independent charging group and discharging group and each group was controlled respectively, so that the charging and discharging times of battery was minimized. The mutual adjustment rules between charging group and discharging group was proposed based on state-of-charge (SOC) of battery, so that battery could avoid overcharge and deep discharge and its life was prolonged. The simulation results show that the proposed method is effective.
Key words: intermittent power source; hybrid energy storage; supercapacitor; battery
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