含储能系统的多微网智能配电系统经济运行

Economic Operation of Smart Distribution Network Containing Multi Microgrids and Energy Storage System

考虑储能系统的充放电灵活性,在传统购售模式基础上,增加"容量租借"模式,并采用单位临界租用成本指导其租用行为。根据多微网运行模式的非合作特性和电能的不同使用形式,将微网间的调度决策问题分解为跨时段决策和实时调度决策2个子问题。以各微网运行成本最低为目标,建立基于效用函数的经济运行柔性目标函数,将各微网目标解耦并统一。考虑供需内在关系后结合动态回溯模拟方法迭代求解,最终得到智能配电系统的最佳运行方式。算例结果验证了所提模型、方法的有效性。

Considering the flexibility of charging and discharging of energy storage system, the capacity-renting mode is added to traditional electricity purchasing and selling modes and the renting behavior is guided by unit critical renting cost. According to the Non-cooperative feature of multi microgrid operation mode and various utilization forms of electricity, the dispatching decision among microgrids is decomposed to two sub-problems, namely the decision-making across time intervals and real-time scheduling decision. Taking the lowest cost of each microgrid as objective, a utility function based flexible objective function of economic operation is established to decouple objectives of all microgrids and make them unified. Considering the internal relation between supply and demand and combining with dynamic backtracking simulation, the objectives are solved by iteration, thus optimal operation modes of microgrids under non-cooperative environment are obtained, and finally the optimal operation mode of smart distribution network is achieved. The validity of the proposed method and models is verified by simulation results.