直流微网群分层对等控制及功率管理策略研究

Research on hierarchical peer-to-peer control and power management strategies for DC microgrid clusters

直流微电网运行不须考虑频率、相位等因素,并且比交流微电网控制简单,因此具有广阔的发展前景。微网群系统是含有多个微电网、储能及负载的互联系统,微网群系统能够利用各个子网间的能量互济作用来解决单一子网由于出力的随机性和不可预测性给微网带来的冲击。文章针对一种含多个子网的微网群结构,提出了一种分层对等控制策略,在微网群中将各个子网看作储能设备,控制其与微网群系统之间的能量流动。基于MATLAB/SIMULINK进行直流微网群系统仿真,通过设置不同场景验证了该系统的稳定性和自治能力。

The operation of DC microgrid does not need to consider frequency,phase and other factors,and it is simpler than AC microgrid control,so it has broad development prospects.The multi-microgrid system is an interconnected system containing multiple microgrids,energy storage and loads,and the multi-microgrid system can use the energy interaction between each subnet to solve the impact of the random and unpredictable output of a single subnet on the microgrid.Aiming at a multi-microgrid structure with multiple subnets,this paper proposes a hierarchical peer-to-peer control strategy,in which each subnet is regarded as an energy storage device to control the energy flow between it and the multi-microgrid system.The simulation of the DC multi-microgrid system based on MATLAB/SIMULINK verifies the stability and autonomy of the system by setting different scenarios.