提高分布式储能系统放电效率的分散协调优化方法

Decentralized cooperative optimization method enhancing discharging efficiency of distributed energy storage system

为提高智能配电网(Smart Distribution Network,SDN)中分布式储能系统(Distributed Energy Storage Systems,DESS)的放电效率,提出了一种基于两层一致性控制和牵引控制的分散协调优化方法。该方法仅通过相邻代理之间的局部信息交互来实现全局信息控制协调,不需要集中代理;通过改进的全局信息发现算法和存在牵引值的一致性算法,代替中央控制器的作用,实现全分布式的分散协调优化;同时,通过对分布式储能系统放电的边际成本的控制,以分散的方式协调各DESS的放电效率,在减少SDN网络局部功率错配的同时,最大限度地提高放电效率。最后通过Simulink进行仿真,验证了此方法的有效性和适应性。

A decentralized cooperative optimization method is proposed based on two-layer consistency control and traction control in this paper to improve discharging efficiencies of distributed energy storage systems(DESS)in a smart distribution network(SDN).The proposed method achieves global information control coordination only through local information interaction between neighbor agents without centralized agents.The decentralized cooperative optimization is accomplished through using the improved consensus-based information discovery and pinning algorithm of multi-agent system(MAS),which obviates the need for a central controller.Meanwhile,the proposed method coordinates DESS and the corresponding discharging efficiencies through using associated marginal costs in a decentralize way,which can maximum the discharging efficiency while reducing local power mismatch in a SDN.Representative simulation cases are carried out to verify the effective DESS and adaptability of the proposed approach.