计及配电网灵活性的多园区综合能源系统分布式优化调度

Distributed optimal dispatching of multiple park integrated energy system considering the flexibility of distribution network

多园区综合能源系统与配电网的交互方式决定多能潮流分布和能量传输损耗,进而将直接影响整个系统的优化运行.本文提出了一种计及多园区综合能源系统与配电网之间接入影响的分布式协同优化调度方案.首先,提出一种包含综合能源系统及配电网的双层分布式优化系统架构.然后,以各园区综合能源系统用能成本最低、配电网网损最小为目标,以能源园区接入配电网的位置及配电网网络拓扑为调控手段给出协同优化模型,并通过改进自适应步长交替方向乘子法实现问题分布式求解,实现了系统的整体高效调度,提升了配电网灵活性及园区综合能源系统运行经济性.最后,通过仿真算例验证了本文所提方法的准确性及有效性.

The interaction between multiple park integrated energy system(PIES) and distribution network determines the multi energy power flow distribution and energy loss, which will directly affects the optimal operation of the whole system. This paper proposes a distributed collaborative optimization scheduling scheme that takes into account the impact of the access between the multiple park integrated energy system and the distribution network. Firstly, a bi-level distributed optimal system architecture including integrated energy system and distribution network is proposed. Then, the location of the PIES connecting to the distribution network and the distribution network topology are given as control methods to get collaborative optimization model, and the goal is to minimize the energy cost of the integrated energy system of each PIES and minimize the loss of the distribution network. By improving the alternating direction method of multipliers with dynamic step size, the distributed solution of the problem is realized. The overall efficient dispatch of the system is realized,the flexibility of the distribution network and the operation economy of the PIES are improved. Finally, a case study verifies the accuracy and effectiveness of the method proposed in this paper.