Using PD Measurements to Identify Stator Winding Insulation Problems

摘要

Partial discharge (PD) measurement is used to detect small sparks that occur on the insulation system of a generator's stator winding. These sparks may occur within the groundwall insulation, between the winding surface and core, or at the end-turn surface of the stator winding. These electrical sparks can damage the insulation material and may eventually cause insulation failure.