基于熵值赋权法的配电变压器状态评估方法研究

Study on Condition Assessment Method of Distribution Transformer Based on Entropy Weight Method

当用若干个指标进行综合评估配电系统运行时,合理分配变压器评估过程中各指标的权重值是保证评估结果客观准确的基础,也是保证评估质量的关键。通过对样本数据的分析,运用熵值客观赋权法与改进层次分析主观赋权法相结合的方式得到评估指标的权重值,既避免了主观赋权的相悖性,又考虑了专家经验的重要性。通过对油浸式配电变压器运行实例的分析,验证了所提方法的有效性。

Timely and accurate grasping the state of the distribution transformer has important guidance significance to distribution transformer maintenance and evaluation of power system operation risk. When a number of index are using to evaluate the condition of a transformer,the values of index weights are very important to the assessment results. Through the analysis of sample data,the combination of entropy objective weighting method and improved analytic hierarchy process subjective weighting method is used to get the values of index weights in the paper. Through the analysis of an oil-immersed distribution transformer,the effectiveness of the proposed method is verified.