基于交替方向乘子法的微电网群双层分布式调度方法

Bi-Level Distributed Optimization for Microgrid Clusters Based on Alternating Direction Method of Multipliers

随着分布式电源的渗透率提高,微电网作为一种有效消纳方式得到了广泛发展和应用。将邻近的多个微电网互联构成微电网群系统进行协同控制和管理,能够有效提高系统的运行经济性和可靠性。提出一种基于交替方向乘子法的微电网群双层分布式调度方法。上层以微电网群系统总运行成本最小为目标,协调各微电网之间的功率交换;下层主要实现各微电网内部各可控分布式电源的优化管理。分布式求解中各微网仅需与相邻微电网传递期望交换功率信息,降低通信需求与负担,且保护各微电网隐私。算例验证了所提方法的收敛性与可行性。

With increased penetration of distributed generation（DG）, microgrid（MG） becomes an efficient control to address DG integration. Regional MGs can be interconnected as microgrid cluster（MGC） to enhance economy and reliability of the system. In this paper, a bi-level distributed optimization for MGCs based on alternating direction method of multipliers（ADMM） is proposed. Its upper level coordinates operation of multiple MGs using distributed ADMM, and the lower level deals with optimal operation of each MG with centralized controller. In the proposed method, only expected power exchange need to transmit between neighboring MGs, thus reducing communication burden and protecting privacy. Case study shows that the proposed method can effectively address MGC optimization.