基于负荷优属度的含DG配电网可靠性研究

Reliability Research of Distribution Network with DG Based on Load Superiority Degree

针对现有含分布式电源(DG)配电网在孤岛模式下运行时,负荷削减过程中对负荷赋权的随意性以及赋权途径过于单一的问题,提出一种基于层次—熵权法的主客观综合赋权算法.首先建立负荷重要程度衡量指标体系,其次基于层次分析法对负荷中各指标主观赋权,然后利用熵权法对各指标客观赋权,最后引入Kender和谐系数得出指标综合权重.该算法一方面充分挖掘指标的客观信息,另一方面提升赋权途径的多样性和综合化.通过对配电网的可靠性进行算例评估,验证所提出算法的正确性,说明提出算法具有一定的理论价值和实际价值.

In order to solve the problem that load weighting is arbitrary and the way of weighting is too single in the process of load reduction when the existing distribution network with distributed generation(DG)is operating in the island mode,a new weight weighting algorithm based on hierarchical entropy method was proposed.Firstly,the index system of load importance degree was established.Secondly,each index in the load was given subjective weight based on the analytic hierarchy process.Then,the entropy weight method was used to give objective weight to each index.On the one hand,the algorithm fully mines the objective information of the indicators,and on the other hand,it improves the diversity and synthesis of the weighting approaches.The correctness of the proposed algorithm was verified by an example evaluation of the reliability of the distribution network,which shows that the proposed algorithm has certain theoretical and practical value.