660 MW Generator PD Test

partial discharge test in a 660 MW generator

Partial discharge (PD) testing is a common method used to assess the condition of high voltage insulation systems in generators, motors, and other electrical equipment. PD is a localized electrical discharge that can occur within insulation materials, indicating potential weaknesses or defects in the insulation system. In a 660 MW generator, which is a large electrical machine, PD testing can be an important diagnostic tool for detecting insulation issues early and preventing catastrophic failures.

Here are some steps that may be involved in performing a partial discharge test in a 660 MW generator:

Preparation: The generator needs to be disconnected from the power grid and properly grounded for safety reasons. The generator may need to be cooled down and cleaned to ensure accurate measurements. Access to the insulation systems, such as the stator winding, rotor winding, and core, may need to be gained through appropriate procedures.

PD Measurement Setup: PD measurement equipment, such as a PD detector or PD analyzer, is used to capture PD signals. Sensors, such as PD couplers or antennas, are installed on the generator at predetermined locations to detect PD activity. The sensors may be placed on the stator winding, rotor winding, core, or other critical areas of the generator, depending on the specific test objectives.