Abstract
Prediction of dissolved gases content in power transformer oil is very significant to detect incipient failures of transformer early. A hybrid model of RVM and PSO (PRVM) is applied to predict dissolved gases content in transformer oil in this paper, and particle swarm optimization is applied to choose the appropriate embedded dimension m because the choice of the embedded dimension has a great influence on its generalization performance. In this study, traditional support vector machine is used in comparison with the proposed PRVM method. In order to testify the superiority of PRVM compared with the traditional support vector machine fully, single-step prediction mode and multi-step prediction mode are employed respectively. The experimental results indicate that the prediction ability of PRVM is more excellent than that of SVM in single-step and multi-step prediction. The article also refers some recent patents on a hybrid model of RVM and PSO.
Keywords: Dissolved gases content, multi-step prediction, relevance vector machine, regression model, time series.
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