离网直流微网群混合储能容量优化配置方法

为了优化储能系统容量配置,提高直流微网群的供电可靠性和经济性,文中提出了一种考虑各子微网互为备用的独立型直流微网群混合储能联合优化配置方法。首先,以直流微网群混合储能整体投资运维等年值成本最低为优化目标,建立混合储能容量配置模型;其次,在不失各个子微网混合储能容量配置独立性的前提下,进一步降低混合储能的配置成本;最后,以双直流微网群为算例对象,通过对比独立优化与联合优化的配置结果说明了利用微网群功率互联的特点能够大幅降低混合储能系统投资成本,提高微网群运行稳定性,从而证明文中所提配置方法的优越性。该方法后期可为独立型直流微网群的规划建设提供依据。

Optimization configuration method for hybrid energy storage capacity of independent DC microgrid cluster

Optimizing the capacity configuration of energy storage system, and improving the reliability and economy of power supply are key issues in the investment and construction of DC microgrid cluster. Considering each sub-microgrid as backup, this paper proposes a capacity optimization configuration method of hybrid energy storage system of inde-pendent DC microgrid cluster. This method establishes a capacity configuration model of hybrid energy storage sys-tem, which takes the equivalence annual costs of overall investment, operation and maintenance of the DC microgrid cluster hybrid energy storage system as the optimization target. This method can further reduce the configuration cost of the hybrid energy storage system without losing the configuration independence of each sub-microgrid. Finally, a case of DC microgrid cluster consisting of double sub-microgrids is used for verification, which demonstrates the superiority of the proposed configuration method by comparing the configuration results of independent optimization and joint optimization. Thus this method can provide a certain scientific basis for the planning and construction of independent DC microgrid cluster.