基于供电分区的中高压配电网综合评价策略

传统的配电网规划综合评价方法缺乏对配电网不同区域特点的考虑,基于供电分区并结合中高压配电网规划特点建立了一套综合评估指标体系。在指标优化方面,根据传统灰色关联方法提出了通过核心指标来简化灰色关联度的计算过程,同时考虑到单独使用灰色关联理论会不利于指标间的相互独立性。因而综合应用层次分析法(Analytic Hierarchy Process, AHP)与灰色关联分析方法进行指标筛选,实现了指标优化与去冗余。引入层次分析法对熵权法的权重计算方法进行修改,使其权重更加合理。此外以最小距离和来设计目标函数,并利用拉格朗日函数从由k(k≥2)种方法计算得到的权重中得到最优权重。以河南省某市2015年和2016年配电网规划的历史数据为例进行综合评估,表明该评价体系与方法能够合理地评估配电网整体发展水平,并找出薄弱环节,为配电网的规划、建设提供参考依据。

Comprehensive evaluation strategy of medium and high voltage distribution network based on power supply division

For traditional distribution network planning comprehensive evaluation lacks consideration of characteristics of different distribution network areas, this paper establishes a comprehensive evaluation index system based on the power supply division and the characteristics of the medium and high voltage distribution network planning. In the aspect of index optimization, based on the traditional grey correlation method, core indices are proposed to simplify the calculation procedure of grey correlation degree. Analytic Hierarchy Process (AHP) and grey correlation analysis method are applied to screen indices and eliminate redundant indices, because only using grey correlation theory is not conducive to the independence of indices. The weight calculation method of entropy weight is modified by AHP to make the weight more reasonable. In addition, the objective function is designed by the minimum distance and the Lagrange function is used to get the optimal weight from the weight calculated by methods. A comprehensive evaluation is made by the historical data of distribution network planning in 2015 and 2016 in a city of Henan Province, illustrating that the evaluation system and method can evaluate the whole development level of the distribution network reasonably and find out the short slabs, which provides references for distribution network planning and construction. This work is supported by National Natural Science Foundation of China (No. 51567018).