基于改进灰色关联分析的配电网低电压贡献度评价方法

Evaluation Method of Low Voltage Contribution Degree Based on Improved Grey Relation Analysis in Distribution Network

我国农村地区电网结构比较薄弱,供电能力不足导致各类低电压问题频发。本文提出一种基于改进灰色关联分析的配电网低电压贡献度评价方法,该方法在传统灰色关联分析的基础上,引入熵权理论对灰色关联系数进行赋值,有效克服了专家赋权和平均加权法的缺陷。算例结果表明,本文所提方法在配电网低电压贡献度评价中,能够准确分析影响低电压的关键环节,实现对低电压的精准有效治理。

The structure of rural power grid in China is relatively weak and lack of power supply ability leads to frequently various low voltage problem.In this paper,a kind of evaluation method of low voltage contribution degree based on improved grey relation analysis in distribution grid is proposed.The entropy weight theory is introduced to evaluate the grey relation coefficient based on traditional grey relation analysis,which can overcome the defect of expert weighting method and average weighting method.It is shown by the calculation result that the method proposed in this paper can accurately analyze the key point of the low voltage in distribution network and achieve accurate and effective control of the low voltage in the low voltage contribution degree in the distribution network.