基于信-能复合调制的多母线直流微电网电流边缘控制策略

Current edge-control strategy of multi-bus DC microgrids based on information-energy dual modulation

尽管直流微电网内新能源的分布式电流均衡控制已经得到了广泛的研究,但实际直流微电网中的通信线路往往是不可靠或者不存在的.基于此,提出一种在无传统通信网络环境下的多母线直流微电网的电流边缘控制策略,以实现电流均衡.首先,设计面向直流微电网的信息-能量复合调制(information-energy dual modulation,IEDM)策略,消除传统的通信设备和通信网络线路,实现新能源电源之间的信息交互.其次,构建多母线直流微电网的状态方程模型,进而将其转化为标准的异构多智能体模型.基于此模型,提出直流微电网内二级控制器的多智能体H∞边缘协同控制策略,同时基于IEDM策略,设计周期性动态事件触发通信协议.最后,通过半实物仿真测试系统验证所提出的基于信息-能量复合调制的多母线直流微电网的电流边缘控制策略的有效性.

Although the distributed current sharing control strategies of renewable energy in the DC microgrid has been widely studied,the communication lines in DC microgrids are often unreliable or nonexistent.Based on this,this paper proposes an innovation current edge-control strategy for the multi-bus DC microgrid without traditional communication networks to achieve the current sharing.Firstly,the information-energy dual modulation(IEDM)is designed to eliminate traditional communication devices and communication line networks,which achieves the information exchange among renewable energy sources.Furthermore,the state-space function regarding the multi-bus DC microgrid is built,which is further switched to the standard heterogeneous multi-agent systems.Based on the proposed model,this paper proposes a secondary H1 consensus approach to achieve accurate current sharing.Based on the proposed IEDM,the periodic dynamic event-triggered communication mechanism is proposed.Finally,the performance regarding the proposed control strategy is verified through the CHIL experiment test system.