Turbines and generators are the main components in power plants which generate electricity. The turbine blades spin and rotate coils of wires within circular arrangements of magnets which result in the generation of electricity.
Corona is present in high voltage rotating electric machines. It is caused by electric field being high enough to locally break down the gas that is adjacent to the solid insulation. Industry statistics by IEEE and EPRI indicate that approximately 40% of all air-cooled high voltage motors and generates failures occur due to insulation. Supporting it, the survey of 1199 hydro generators carried out by the CIGRE study committee SC11, EG11.02 present the insulation damage as the main factor in hydro generators failure mechanism
Ofil’s daytime corona cameras enable pinpointing sources of corona partial discharge and designate thereby faulty components and components in deteriorating stages.