基于改进型下垂控制的微电网多主从混合协调控制
Multiple Master-slave Mixed Coordinated Control for Microgrid Based on Improved Droop Control
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摘要: 考虑到微电网中包含有多个分布式电源,需要根据分布式电源的类型采用不同的控制方法,从而实现不同的协调控制策略。在对传统的下垂控制进行改进的基础上,考虑到传统主从控制与对等控制的优缺点,提出了将改进型下垂控制应用到介于主从控制与对等控制之间的一种混合控制方法中,即两个或两个以上的分布式电源采用改进型下垂控制,并将这些下垂微电源整体作为主控部分,其余的微电源采用恒功率控制作为从控部分。最后,在MATLAB/Simulink软件中搭建了多下垂混合控制的微电网模型和传统的主从控制微电网模型,对两种控制的微电网分别进行孤岛、并网、投切负荷等操作进行了仿真比较,并分析了运行中各项参数变化的影响。仿真结果表明多下垂混合控制相比于传统的主从控制具有更好的适应性和稳定性。Abstract: Considering there are multiple distributed power sources in the microgrid,different control methods are needed for different types of distributed power supply to realize different coordinated control strategies.Based on the traditional droop control to be improved,considering the advantages and disadvantages of traditional master-slave control and traditional peer control,a hybrid control method between master and slave control is proposed,which is based on the improved droop control.In this control two or more than two distributed generators（DGs）use improved droop control work as the master,the rest of DGs use constant power control work as the slave.Finally,a microgrid model for multi-droop hybrid control and one for traditional master-slave control are developed on the MATLAB/Simulink software.Simulation is made of the two kinds of microgrid on islanding,getting grid-connected,load shedding loading,and so on.Simulation results show that multi-droop hybrid control has better adaptability and stability compared with traditional master-slave control.
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