考虑峰谷电价的串联结构光储型多微网经济运行

Economical Operation of PV-ESS Multi-microgrid with Series Structure Considering Time-sharing Price

随着微网规模化发展,相邻区域内因互联互供所需可组成多微网系统。如何使多微网高效经济运行成为智能电网发展的关键技术之一。针对串联结构光储型多微网经济优化运行,提出一种考虑峰谷电价的分布式模型预测控制算法。基于源荷预测建立各层子微网经济性最优的目标函数,通过各子微网中央控制器联合进行分布式预测控制,从而实现滚动优化求解。算例结果验证了所提出优化算法的可行性及经济性。

With the large-scale development of microgrids, adjacent regions can form a multi-microgrid owing to the in- teractive connections and demand-supply relations. The way to maintain the multi-microgrid in an efficient and economi- cal operation is becoming one of the key technologies for the development of smart grid. In this paper, to make the PV- ESS muhi-microgrid with a series structure run economically, a distributed model predictive control algorithm is pro- posed considering time-sharing price. Based on the prediction of sources and loads, the objective functions in every lay- er of subordinate microgrid are formulated, thus a rolling optimization method can be used to solve the established func- tions via the distributed predictive control by the central controller on each subordinate microgrid jointly. The feasibility and economical efficiency of the proposed optimization algorithm are verified by an actual example.