Implementation and experimental evaluation of stator coil insulation state of health measurement techniques under SiC switching operation

This paper presents a testbed to evaluate the insulation of form-wound medium voltage stator windings. Three methods for tracking the changes to the health of the insulation are discussed in regards to their application to online monitoring of industrial machines. The methods are implemented to track changes to insulation health of form-wound coils that have undergone various levels of insulation deterioration created by thermal and electrical accelerated aging. The results of the three state of health tracking methods are presented and the methods are compared.