基于模糊聚类算法的油纸绝缘状态研究

Study on Oil-paper Insulation Condition Based on Fuzzy Clustering Analysis Method

回复电压测试法是利用电介质响应特性评估变压器油纸绝缘老化状态的方法,通过回复电压法可以得到变压器油纸绝缘的相关参数。首先,本文辨识ED等效电路参数以及基于回复电压法提取相关特征量,将所得到的特征量用于电力变压器油纸绝缘老化评估;其次,利用模糊聚类分析法将不同油纸绝缘老化程度较接近的变压器进行归类,综合判断变压器油纸绝缘的老化情况,为评估电力变压器油纸绝缘老化状态提供一种新的思路和方法。

Return voltage measurement is a detection method of using dielectric responce of transformer oil-paper insulation aging status, a lot of power transformer test data are obtained with the return voltage measurement. Firstly, based on the return voltage method, the characteristic quantity measured with the return voltage method and the characteristic quantity based on ED equivalent circuit are extracted and used as the oil-paper insulation aging evaluation characteristic quantities of power transformer. Secondly, classify the similar degrees of aging oil-paper insulated transformers as a class by using fuzzy cluster, determine the extent of aging of oil-paper insulation transformer which is unknown. The results show the proposed fuzzy cluster can fast and accurately evaluate the insulation condition of power transformer, which pro- vides a new idea and method for the evaluation of power transformer insulation condition.