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In most aging transformers, windings failures are caused by the deterioration of the insulation, leading to arcing and short circuits. Vibrations in a transformer are generated by different forces appearing in the core and winding during the operation. Winding vibrations result from the electromagnetic forces that are generated by the interaction of the current in a winding with leakage flux. These...
Partial discharge (PD) measurement has been deployed as a well established test method to monitoring the health of the insulation inside generators, transformers, gas insulated switch gear, and bus bars. There are different technologies to monitor the health of insulation by PD measurement, e.g., UHF high frequency capacitance measurement and acoustic emission using piezoelectric sensors. UHF technique...
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