基于优化一致性算法的微网功率经济分配策略

Economic dispatch strategy of power for microgrid based on optimal consistency algorithm

针对微网经济调度问题而通常采用的分布式控制,被控单元之间物理距离一般比较远,可能会存在较大的通信滞后,而通信滞后会降低分布式控制精度,因此提出了一种基于优化一致性算法的微网功率经济分配策略。首先将下垂控制信息和改进的一致性算法相结合,通过下垂控制实现功率分配,能够有效地克服滞后,使得系统具有很好的收敛性能;同时采用一致性算法设计成本最小化控制器,实时控制微网发电机运行,协调各电源出力,最终在成本最小化下实现功率分配。最后仿真结果验证了策略的有效性。

To solve the economic scheduling problem of microgrid,distributed control is usually adopted,because the physical distance between the controlled units is generally far,there may be a large communication delay,and the communication delay will reduce the distributed control precision,so a microgrid power economic allocation strategy based on optimization consistency algorithm is proposed.Firstly,the droop control information is combined with the improved consistency algorithm to realize power distribution through droop control,which can effectively overcome the delay and make the system have good convergence performance.At the same time,a cost minimization controller is designed with the consistency algorithm to control the operation of microgrid generator in real time,coordinate the output of each power source,and finally realize the power distribution under the cost minimization.Finally,the simulation results verify the effectiveness of the strategy.