变压器励磁涌流变权综合识别方法研究

Study on the transformer inrush current synthetic identification based on variable weights

分析了不同变压器励磁涌流识别判据之间的互补性,给出了基于2可加模糊测度的判据重要度和交互性的定量计算方法,在此基础上提出最优识别判据组合的选取原则和判据权重的确定方法。针对励磁涌流识别的特点,提出一种状态变权向量函数,实现了励磁涌流的变权综合识别。实验数据分析结果表明所提出的励磁涌流模糊识别方案充分利用了各判据的互补性,加强了励磁涌流和故障电流在识别特征上的区别,提高了保护的灵敏度和可靠性。

The interactions among different transformer inrush current identification criteria are analyzed. Based on 2-additive fuzzy measures, the method used for calculating the importance and interaction of identification criterions is presented, and based on this the selection principle of optimal criterions combination and the constant weight calculation method are proposed. Considering the characteristic of inrush identification, a new state variable weights function is proposed and the variable weights synthetic identification of transformer inrush current is realized. The results of test data analysis show that by this method the complementarities of the criterions are synthesized completely, and the performance of transformer protection is improved. This work is supported by National Natural Science Foundation of China （No. 50777016）.