电网技术Issue(9)：2452-2458,7.
平抑光伏系统波动的混合储能控制策略
A Control Strategy of Hybrid Energy Storage System Capable of Suppressing Output Fluctuation of Photovoltaic Generation System
摘要
Abstract
Hybrid energy storage system (HESS) composed of batteries and super-capacitors can bring the advantages of high energy density of batteries and that of high power density of super-capacitors into full play simultaneously, so HESS is suitable to be applied in microgrid. In the independent photovoltaic (PV) generation microgrid, in which the Buck/Boost bidirectional power converters are connected to DC bus directly, a new energy management scheme, in which after filtering the fluctuating power of the HESS the current hysteresis control is applied to charging/discharging of batteries and the power difference is supplied by super-capacitors, is proposed to optimize the management of HESS. To suppress the output fluctuation of PV generation system and control DC bus voltage, a new control strategy applied to the bidirectional converter of the super capacitor is put forward: based on the voltage and current double closed-loop control the interferences of the fluctuation of input voltage and load current on DC bus voltage are eliminated by input voltage and current feed-forward loops to improve the dynamic response and control precision of the control system, and using capacitor voltage feed-forward loop the influences of variation of the values and directions of load currents on the variation of closed loop poles of control system are eliminated, thus the stability of the control system is improved. The effectiveness of the proposed energy management scheme and control strategy is verified by simulation results.关键词
光伏系统/混合储能系统/超级电容/蓄电池/Buck/Boost双向变换器/能量管理方案/前馈控制Key words
photovoltaic system/hybrid energy storage system/super-capacitor/battery/Buck/Boost bidirectional converter/energy management scheme/feed-forward control分类
信息技术与安全科学引用本文复制引用
王海波,杨秀,张美霞..平抑光伏系统波动的混合储能控制策略[J].电网技术,2013,(9):2452-2458,7.基金项目
国家863高技术基金项目(2011AA05A106)；国家自然科学基金(50977055)。The National High Technology Research and Development of China 863 Program (2011AA05A106) （2011AA05A106）
Project Supported by National Natural Science Foundation of China(NSFC)(50977055) （NSFC）
