面向数据中心的柔性直流配电系统多目标综合评估

Multi-objective Comprehensive Evaluation Method of Flexible DC Distribution System for Data Center Application Scenarios

基于柔性直流配电系统(flexible DC distribution system,FDCDS)技术构建数据中心应用场景,从多个层面对数据中心FDCDS进行量化评价,对于提高数据中心供电的可靠性和经济性具有重要的理论与现实意义。为此,提出了一种面向数据中心应用场景的FDCDS多目标综合评估方法。首先从供电可靠性需求、投资建设运行成本角度、数据中心场景需求和节能需求等方面建立了数据中心FDCDS的综合评估指标体系;其次,为了使所确定的指标权重能够同时体现专家经验和指标本身的客观差异性,利用序关系法和离差最大化法相结合的方法来确定指标权重,进而提出了基于类高斯分布型模糊隶属度函数的数据中心FDCDS多目标综合评估方法。最后通过对不同配电系统算例进行多目标综合评估,验证了所提评估指标体系和方法的有效性。

Establishing data center application scenarios based on flexible DC distribution system(FDCDS)and quantitatively evaluating the FDCDS of data center from multiple aspects are of great theoretical and practical significance to improvements in the reliability and economic efficiency of data center power supply.Therefore,this paper proposes a multi-objective comprehensive evaluation method of FDCDS for data center application scenario.Firstly,a comprehensive evaluation index system of FDCDS of data center is established from the perspectives of power supply reliability demand,investment and construction operation cost,data center scene demands,and energy saving demands.Secondly,to ensure that the determined index weight can reflect the expert experience and the objective difference of index itself,a method combining the order relation method and maximizing deviation method is used to determine the index weight,and then a multi-objective comprehensive evaluation method based on like-Gaussian distribution fuzzy membership function is proposed.Finally,the effectiveness of the proposed evaluation index and method is verified by the multi-objective comprehensive evaluation of different distribution system examples.