基于多目标模糊优化的配电网柔性互联装置运行配置

Operation Configuration of Flexible Interconnection Device in Distribution Network Based on Multi-Objective Fuzzy Optimization

配电网中柔性互联装置优化运行方式能够提高配电网的供电可靠性,合理配置柔性互联装置需综合兼顾设备投资经济性、供电可靠性及运行经济性等。针对柔性互联装置的运行配置展开研究,提出了基于预想故障集下的平均失电负荷减少率,对柔性互联装置的布点进行了优化分析,筛选对供电可靠性影响较大的布点;采用多目标模糊优化对柔性互联装置的容量配置进行优化,建立了配电网最小失电负荷和最小网络损耗目标函数,采用模糊优化的贴近度对不同量纲的多目标函数趋近于优化解的程度进行衡量;同时考虑柔性互联配电网交直流潮流平衡的确定性约束、配电网负荷和分布式电源功率波动引起的支路安全电流和节点电压的不确定性约束。最后,基于改进的IEEE 33节点柔性互联配电网模型对所提运行配置方案进行了验证和分析。

Optimizing the operation mode of the flexible interconnection device in the distribution network can improve the power supply reliability,and reasonable configuration of flexible interconnection device requires comprehensive consideration of equipment investment economy,power supply reliability and operation economy.In this paper,the operation configuration of flexible interconnection device is studied.Based on the average loss reduction rate of power load under the expected fault set,the distribution of flexible interconnection device is optimized,the distribution point that has great influence on power supply reliability is selected.Then,multi-objective fuzzy optimization is adopted to optimize the capacity of flexible interconnection device,based on the established objective function of minimum load loss and minimum distribution network loss.The approach degree of fuzzy optimization is taken to evaluate the optimal solution of multi-objective function.Moreover,the deterministic constraints of AC/DC power flow balance,and the uncertainty constraints of branch safety current and node voltage considering the power fluctuation of load and distributed generation are also included.Finally,based on the improved IEEE 33 node distribution network model,the operation configuration scheme proposed in this paper is verified and analyzed.