基于熵权理论和灰色评估理论的变压器绝缘状态评估方法

The Estimated Method of Transformer Insulation Status Based on Entropy Weight Theory and Grey Estimate Theory

为了解决DGA中各指标灰色贡献度权重问题,首次将熵权理论引入灰色理论中。采用加权靶心系数计算靶心度。将靶心度按绝缘状态进行分级,为在没有标准状态模式下的绝缘状态评估提供理论依据。实验表明,该方法能有效地对变压器绝缘状态进行评估。

Entropy weight theory is introduced into grey theory in order to obtain parameter weights of grey contribution degree in DGA. Target center degree is calculated by taking parameter weights to target center coefficient. According to classification of insulative status, target center degree is classed so as to assess insulative status without standard model. The experiment result shows that the method is effectively capable of assessing insulative status of the power transformer.