【摘要】 微网技术是解决分布式发电系统并网问题的有效途径之一,基于风光储互补的微网系统具有充分利用清洁能源和运行可靠的特点。微网的并网和孤岛运行模式之间的平滑切换是安全稳定运行的重要保障。为此,采用新型的主从和对等控制相结合的综合控制策略,对微网的并网/孤岛运行模式的过渡进行控制。在DigSILENT/PowerFactory平台上搭建风光储互补的微网模型,仿真结果验证了该控制策略的可行性。更多还原

【Abstract】 Microgrid is an effective approach to solve the grid-connection of distributed generations,and the hybrid microgrid composed of wind farm,photovoltaic generation and energy storage system possesses the feature that the clean energy can be fully utilized and its operation is reliable.The smooth switching between grid-connected operation mode and islanded operation mode of microgrid is an important measure to ensure the secure and reliable operation of microgrid.For this reason,a synthetical control strategy integrating new type of master-slave control with peer-to-peer control is adopted to control the operation mode transition between grid-connected operation mode and islanded operation mode of microgrid.A model of microgrid composed of complementary wind farm,photovoltaic generation and energy storage system is constructed on DigSILENT/PowerFactory platform,and the feasibility of the proposed control strategy is verified by simulation results.Besides,simulation results also show that the improved control strategy can ensure power balance of microgrid before and after the switching and keep the voltage of the bus connected with microgrid and frequency of the microgrid within the allowed range.更多还原