基于含多微网接入的主动配电系统自主优化经济调度

Autonomous optimal economic dispatch of active distribution system based on multi-microgrid access

针对含多微网接入的主动配电系统经济调度方法在中断负荷的影响下,调度结果与微网出力情况不一致导致的经济性差的问题,提出基于含多微网接入的主动配电系统自主优化经济调度方法。以多微网的电源特性为依据,计算主动配电系统的运行成本和环境成本,以运行成本和环境成本经济效益最大化为目标,建立自主优化经济调度目标函数,并从环境成本和运行成本两方面设计目标函数的约束条件,进行支路潮流约束,限制微网的输出功率等,使配电系统输出功率变化与电池出力情况变化趋势保持一致,在约束条件下求解目标函数,获得目标函数解集,求解集合中各个解与理想权重的接近程度,筛选出最优解,实现主动配电系统的自主优化经济调度。实验结果表明:设计的调度方法在中断负荷的情况下,运行成本低,优化水平高,微网输出功率稳定,并且与电池出力情况一致,该方法的经济性得到了提高。

Aiming at the problem of poor economic efficiency caused by the inconsistency of the dispatch results with the output of the micro-grid under the influence of the interrupted load,an autonomous optimal economic dispatch method of the active power distribution system with multiple micro-grid access is proposed.Based on the power characteristics of the multi-microgrid,the operating cost and environmental cost of the active power distribution system are calculated.Aiming at maximizing the operating cost and environmental cost and economic benefits,we establish an objective function for autonomous optimization of economic dispatch,design the constraint conditions of the objective function from two aspects of the environmental cost and operating cost,carry out the branch power flow constraint,and limit the output power of the micro-grid,etc.,so that the output power change of the distribution system is consistent with the change trend of the battery output,and the objective function is solved under the constraint conditions to obtain the objective function solution set,solve the closeness of each solution in the set to the ideal weight,filter out the optimal solution,and realize the autonomous optimal economic dispatch of the active power distribution system.The experimental results show that the designed scheduling method has low operating cost,high optimization level,stable micro-grid output power and consistent with battery output when the load is interrupted.The economic efficiency of the proposed method is improved.