【摘要】 为减小微电网对通信系统的依赖性,实现分布式电源和负荷的即插即用,结合微电网不同运行模式,研究了微电网对等控制策略。在对等控制策略中,分布式电源采用下垂控制,调节分布式电源的输出电压和频率;下垂控制器中的P-f和Q-U具有线性的下垂特性。建立了对等控制策略下的微电网运行模型,分析了并网和孤岛运行模式之间切换、孤岛模式下切/增负荷及孤岛模式下切/增微电源三种运行状况下的微电网运行特性,基于Matlab/Simulink仿真结果,研究了微电网母线电压、DG频率和功率的变化规律,验证了控制策略的正确性和可行性。更多还原

【Abstract】 To reduce the dependency of the microgrid on the communication system and implement the plug-and-play for distributed generators(DG) and loads,the peer-to-peer control strategies in the microgrid were studied by considering the different operation modes. The droop control method of the DG was adopted in the peer-to-peer control strategy. The output voltage and frequency of the DG were regulated according to the linear droop characters of P-f and QU in the droop controller. The operation model of the micro-grid was established based on the peer-to-peer control strategy. The operation characteristics of the microgrid were analyzed respectively in the three operation modes: the mode switch between the grid-connected operation and the islanding operation,the load changes in the islanding mode and the micro-power changes in the islanding mode. Based on the MATLAB/SIMULINK simulation results,the changing laws of the bus voltage,DG frequency and power of the microgrid were studied and the correctness and feasibility of the peer-to-peer control strategy were verified.更多还原