The complex of works on diagnostics and assessment of the technical condition of electrical equipment is carried out by certified experts using modern diagnostic and testing equipment.
The methods of diagnostics used by the company specialists allow to examine the technical condition of the diagnosed equipment, determine the presence or absence of defects, give a conclusion on the possible continuation of operation of the equipment, and adjust the necessary amount of work for repair or modernization.
Diagnostic works carried out at stations include:
Analysis of operating modes and operational documentation and the results of operational measurements and tests
Determination of the losses of the active steel of the stator core by the electromagnetic method at reduced voltage
Estimation of the losses of the active steel of the stator core by the electromagnetic method at full induction
Estimation of the insulation state of the stator winding and generator rotor
Measurement of partial discharges of the frontal zone of the stator winding of the generator
Monitoring the technical condition of the shrouds
Control of the compacting density of the active stator steel by ultrasonic method
Technical inspection of the main junctions of the turbogenerator according to the special program using rigid and flexible endoscopes
Monitoring the compacting density of the stator winding
Evaluation of changes in the geometry of the basket of the frontal parts of the stator winding
Technical assessment of the condition of the shrouds and the mount cantilevers of the stator winding, connecting busbars
Evaluation of the cooling system of the turbogenerator junctions
Monitoring the technical condition of the rotor metal by zones (bearing necks, transition fillets, thrust ridges, ventilation ducts), stator core support assemblies
Estimation of gas density of bundles and the generator as a whole
Ultrasound inspection of electrical equipment
Thermal imaging examination of equipment.