并网型微网的优化配置与评估

Integrated Plan and Evaluation of Grid-connected Microgrid

在考虑微网并网性能指标的情况下,通过微网配置和运行联合优化,提出一种并网型微网优化配置方法,实现微网全寿命周期成本最小。首先,采用自平衡度、冗余度、可再生能源利用率等指标作为约束条件参与配置优化,从不同角度评价微网并网性能;其次,针对风光资源的不确定性,采用场景生成和场景缩减技术在多重随机场景下修正配置方案,以提高微网配置方案的鲁棒性;最后,采用实际工程数据对微网配置进行优化,并对配置方案进行分析和评估。

A novel integrated plan optimization method of grid-connected microgrid is presented with the objective to minimize the life-cycle cost.The proposed method is based on joint optimization of optimal sizing and operating considering the grid-connected performance index.Firstly,the self-balancing level,redundancy level,RES utilization level and other indexes are defined to evaluate grid-connected performance as constraints on the optimization method.Secondly,the sizing optimization would be done in multiple random scenarios to deal with the indeterminacy of solar and wind resource based on scenario generation and reduction.Finally,the simulation results based on the actual data on the microgrid project are presented to demonstrate the performance of the proposed approach.