中文摘要：

针对由光伏、蓄电池及可变负载组成的独立直流微电网,提出电压和电流分段式协同控制策略。该控制策略将能量管理划分为4种工作模式,采用最大功率点跟踪控制充分利用太阳能,将蓄电池作为支撑单元,当光伏模块不能稳定直流母线电压的时候,蓄电池才工作,从而降低蓄电池的切换频率。为了防止过充,将蓄电池充电分为恒流充电和恒压充电两种模式,从而增加蓄电池的使用寿命。建立Matlab仿真模型,其仿真结果验证所提控制策略的可行性。

英文摘要：

Segmented cooperative control strategy of voltage and current was proposed for independent DC micro-grid composed of photo-voltaic, batteries and variable load. Energy management was divided by the control strategy into four operating modes. In order to make full use of solar energy, maximum power point tracking control was adopted. The battery, as a supporting unit, worked only when the PV modules can not stabilize the DC bus voltage, which could reduce the switching frequency of the battery. In order to prevent overcharge, the battery charge could be divided into constant-current and constant-voltage charge modes, thus increasing the battery＇s life. Simulation models were made in Matlab and the simulation results demonstrate the feasibility of the proposed control strategy.