考虑路径损耗的热电联供型微网三层能量优化策略

Three-Layer Energy Optimization Strategy for CHP Microgrid Considering Path Loss

为了降低微网对外部系统的依赖与微网自身的运行成本,针对热电联供型微网群,提出了一种三层能量优化策略。该策略不仅构建了以各微网运行成本最小为目标的下层优化运行模型、各主体间交互成本最小为目标的上层优化运行模型,还新构建了以能量传输路径损耗最小为目标的中间层优化运行模型。该中间层模型通过易货交易和买卖交易的方式提高微网间能量互济能力,并基于Floyd-Warshall算法为微网间能量交易搜索最优传输路径。算例结果显示,该三层优化策略具有良好的适用性,相比其他优化策略,能量传输过程损耗更低、微网间能量互济能力更强,各微网运行成本更小。

In order to reduce the dependence of the microgrid on the external system and the operating cost of the microgrid itself,a three-layer energy optimization strategy is proposed for the combined heat and power microgrid cluster.This strategy not only constructs a lower layer optimal operation model aiming at minimizing the operation cost of each microgrid and an upper layer optimal operation model aiming at minimizing the interaction cost between agents but also constructs a new middle layer optimal operation model aiming at minimizing the loss of energy transmission path.The middle layer model improves the energy mutual aid ability between microgrids through barter and trading transactions and searches for the optimal transmission path for energy transactions between microgrids based on the Floyd-Warshall algorithm.The example results show that the three-layer optimization strategy proposed in this paper has good applicability.Compared with other optimization strategies,the proposed strategy has a lower energy transmission process loss,a stronger energy mutual aid ability between microgrids,and a smaller operation cost for each microgrid.