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Paper insulation impregnated with oil has been stressed with fast repeating transients. the frequency was set to 5 kHz, 8kHz and 10 kHz and the times to failure showed a much faster breakdown rate then when compared with a clean AC waveform at 50 Hz. The times to failure were also different for each frequency showing that repetition frequency has a major effect on the failure time. The material was...
Fast transients have become a considerable addition to the electric grid, especially on locations where DC generated current needs to be converted into AC. The full impact of fast transients on high voltage equipment is still unknown and the scope of this contribution is to show that fast repetition frequencies of fast transients decrease the life expectancy of paper insulation. An aging waveform...
Identifying future trends in the power grid is vital in the extension of the life of its already aging components. Fast transients are the new factors that need to be taken into consideration as their high repetitive frequencies and fast rise times accelerate the aging of the paper insulation in devices such as transformers. As will be outlined below, an aging set-up has been proposed to study these...
Repetitive transient aging is not a well understood phenomena in the high voltage world. For this reason, an aging waveform has been designed to understand what the scale of the impact of these pulses is on the paper insulation of a transformer. The times to breakdown between AC plus transients and clean AC are analysed and a clear trend is identified showing that transients are damaging to the insulation...
In this paper, a model-predictive control based framework is proposed for modeling and optimization of the health state of power system equipment. In the framework, a predictive health model is proposed that predicts the health state of the equipment based on its usage and maintenance actions. Based on the health state, the failure rate of the equipment can be estimated. We propose to use this predictive...
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