Title :
Partial discharge theory and technologies related to medium-voltage electrical equipment
Author :
Paoletti, Gabriel J. ; Golubev, Alexander
Author_Institution :
Cutler-Hammer Eng. Services, Predictive Diagnostics, Pennsauken, NJ, USA
Abstract :
Partial discharge (PD) monitoring is an effective online predictive maintenance test for medium-voltage (MV) motors, MV generators, and MV switchgear at 4160 V and above, as well as other electrical distribution equipment. The benefits of online testing allow for equipment analysis and diagnostics during normal production. Corrective actions can be planned and implemented, resulting in reduced unscheduled downtime. An understanding of the theory related to PD, and the relationship to early detection of insulation deterioration is required to properly evaluate this predictive maintenance tool. This paper presents a theory to promote the understanding of PD technology, as well as various implementation and measurement techniques that have evolved in the industry. Data interpretation, corrective actions, and application to electrical distribution equipment is also reviewed
Keywords :
electric generators; electric motors; insulation testing; machine insulation; machine testing; maintenance engineering; partial discharge measurement; switchgear; switchgear testing; MV generators; MV motors; MV switchgear; corona damage; corrective actions; data interpretation; electrical distribution equipment; equipment analysis; equipment diagnostics; insulation deterioration; insulation testing; medium voltage; medium-voltage electrical equipment; online predictive maintenance test; online testing; partial discharge theory; surface tracking; unscheduled downtime reduction; Electrical equipment industry; Insulation; Measurement techniques; Medium voltage; Monitoring; Partial discharges; Predictive maintenance; Production; Switchgear; Testing;
Journal_Title :
Industry Applications, IEEE Transactions on
