现有的分布式系统控制策略在控制分布式电源时,一般控制的是节点的电压参数.文中增加了对频率和功率的控制,这不仅能使得电网系统电压达到稳定,还能控制节点频率并分配DG之间的功率输出,使其平滑的切换至并网运行模式.该控制策略将多智能体系统构建为3层:协调控制层、积分运算层和主控制层.在微网受到较大扰动时,网络中的各个DG通过邻节点信息和当前节点信息进行协调控制来决定其当前功率、电压及频率,以达到微网的稳定性要求.通过MATLAB/SIMULINK使用IEEE Standard 399-1997标准测试系统对5节点的微网系统进行了仿真实验,结果表明,通过分布式协调控制方法能够稳定微网的频率和电压,使分布式电源在微网中实现即插即用.%In order to balance the power generation and demand after sudden disturbances,this paper presents a decentralized control method for the electronically interfaced distributed generation system that controls the output frequencies,power,and voltages in the grid-connected,islanding,and synchronizing modes.Previously,the system uses the voltage parameters to control.This paper utilizes distributed coordinated control to stabilize the system frequency and voltage,also to distribute the generation among DGs to reconnect to the main grid.The proposed method has a three-layer hierarchical structure:cooperating controller,integrator controller,and the primary controller.When the grid experiences sudden disturbances,the proposed control system adjusts the frequency and voltage to reconnect the micro grid to the main grid by utilizing only local measurements from the neighboring DGs.The proposed control system is verified on a modified IEEE Standard 399-1997 test system using MATLAB/ SIMULINK,the results show that the distributed coordinated control method can stabilize the frequency and voltage of the microgrid,and helps to realize the plug-and-use of the distributed power play in the micro network.
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