含有多种分布式电源（ DG）的微电网在孤岛运行时，DG出力的随机性以及负荷的波动性对系统的安全稳定运行带来了巨大挑战。针对含有柴油发电机、光伏发电单元和储能单元的孤岛微电网，提出了各分布式电源的协调控制策略，光伏发电单元采用最大功率跟踪控制以最大限度利用太阳能，储能单元与柴油发电机协调控制以提高系统运行的稳定性。采用模型预测控制策略（ MPC）实现并网逆变器的内环电流控制，避免了繁琐的PI参数整定以及PWM调制器的使用，提高了控制器的动静态性能。仿真结果验证了所提控制策略的有效性与可行性。%Great challenges have been brought to the safety operation of micro⁃grid system when it operates in the i⁃solated mode, due to the randomness of distributed generations ( DG) and the volatility of loads. A coordinated con⁃trol strategy was proposed, aiming at the isolated micro⁃grid with diesel generator, PV system and energy storing system. The maximum power point tracking( MPPT) control strategy was used for the control of photovoltaic ( PV) system, so as to utilize solar energy to the most extent, and the coordinated control strategy between diesel genera⁃tor, photovoltaic generator unit and energy storing system was carried out. A model predictive control( MPC) strate⁃gy was implemented to realize the internal loop current control, which means the tedious tuning of PI controller and the use of PWM modulator can be avoided. The simulation result shows the effectiveness and feasibility of the pro⁃posed control strategy.
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