Zustandsbewertung eines Isoliersystems für rotierende Hochspannungsmaschinen mit elektrischen und dielektrischen Messverfahren (English shop)

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Reliable condition assessment of insulation systems is essential for the operational safety and service life of high-voltage rotating machines. In this dissertation, Mohsen Shahvaroghi Farahani investigates electrical and dielectric measurement techniques for detecting insulation defects and aging processes.

The research focuses on partial discharge measurements, dielectric dissipation factor and capacitance measurements, and the analysis of dielectric response in the time and frequency domains. Experimental investigations on stator bars examine the effects of thermal, electrical, and thermomechanical stresses, as well as moisture and temperature, on insulation performance.

The results demonstrate that electrical measurement techniques are particularly sensitive to localized insulation defects, while dielectric methods are more effective in detecting moisture and widespread aging processes. The study provides valuable insights into early fault detection and reliable condition diagnostics for high-voltage rotating machines.