Theory and application of dynamic aging for life estimation in machine insulation

After a brief discussion on possible on-line indicators of aging, this pape r presents a concept of dynamic aging theory (DAT). Based on the philosophy of a DAT, a dynamic multistress aging model is proposed. Necessary DAT for mulation and software have been developed for testing the model against lab oratory aging data. In this study, dynamic stagnation voltage (DSV), a deri ved partial discharge parameter, and the groundwall insulation response to a traveling acoustic wave have been found to be the most appropriate parame ters for assessment of remaining insulation machine life. This approach is shown to be a meaningful and practical solution to a very complex problem. Although this study is in its initial stage, it does show significant promi se as an an-line tool for dynamically predicting remaining life based on DA T and other appropriate feedback measures.