Thermal Power Plant

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Industry Overview

The purpose of electrical tests in thermal power plants is to verify insulation performance, electrical parameters and operational reliability of power equipment, confirm correct installation and control logic, detect potential defects in advance, and ensure safe grid connection, stable operation and long-term reliable running of generating units in compliance with standards.

Test Objects (Tested Specimens)Test ItemsIEC StandardsANSI/IEEE Standards
Steam Turbine GeneratorsStator and Rotor Winding Resistance Measurement, Insulation Resistance Test, Polarization Index (PI) Test, Dielectric Loss Factor (tanδ) Test, No-Load Test, Load Test, Short-Circuit Test, Temperature Rise Test, Vibration and Noise Measurement, Rotor Insulation TestIEC 60034-1, IEC 60034-2, IEC 60034-18, IEC 60034-27IEEE Std 115, IEEE Std 118, IEEE Std 56, IEEE Std C50.12
Power Transformers (Generator Step-Up Transformers, Distribution Transformers)Winding Resistance Measurement, Voltage Ratio and Phase Displacement Test, Insulation Resistance Test, Dielectric Loss Test, No-Load Loss and Current Test, Load Loss and Impedance Voltage Test, Induced Overvoltage Test, Lightning Impulse Test, Switching Impulse Test, Partial Discharge (PD) MeasurementIEC 60076-1, IEC 60076-2, IEC 60076-3, IEC 60076-5IEEE Std C57.12.00, IEEE Std C57.12.90, IEEE Std C57.104
Circuit Breakers (AC High-Voltage Circuit Breakers)Insulation Resistance Test, Dielectric Withstand Voltage Test, Contact Resistance Measurement, Mechanical Operation Test, Trip and Close Time Test, Short-Circuit Breaking and Making Capacity TestIEC 62271-100, IEC 62271-1IEEE Std C37.06, IEEE Std C37.09, IEEE Std C37.10
Current Transformers (CT) & Voltage Transformers (VT/PT)Ratio Error and Phase Error Test, Insulation Resistance Test, Dielectric Withstand Test, Polarity Test, Excitation Characteristic TestIEC 60044-1, IEC 60044-2, IEC 60044-5IEEE Std C57.13, IEEE Std C57.13.1, IEEE Std C57.13.6
Surge ArrestersInsulation Resistance Test, Leakage Current Measurement, Lightning Impulse Withstand Test, Operating Voltage Test, Thermal Stability TestIEC 60099-4, IEC 60099-6IEEE Std C62.11, IEEE Std C62.22
Insulating OilBreakdown Voltage Test, Moisture Content Test, Dissolved Gas Analysis (DGA), Viscosity Test, Acid Number Test, Oxidation Stability TestIEC 60156, IEC 60814, IEC 60567, IEC 60296ASTM D877, ASTM D1533, ASTM D3612, ASTM D974
Power Cables (High-Voltage Power Cables)Insulation Resistance Test, Dielectric Loss Factor Test, AC Withstand Voltage Test, Partial Discharge Test, Conductor Resistance Measurement, Thermal Aging TestIEC 60502-1, IEC 60502-2, IEC 60228IEEE Std 400, IEEE Std 400.2, IEEE Std 575
Protective Relays & Control SystemsRelay Function Test, Setting Value Calibration, Tripping Time Test, Interlocking Test, Communication Test with SCADA System, Overcurrent/Overvoltage Protection TestIEC 61850, IEC 60255, IEC 61508IEEE Std C37.2, IEEE Std C37.90, IEEE Std C37.112
Busbars (High-Voltage Busbars)Insulation Resistance Test, Dielectric Withstand Voltage Test, Temperature Rise Test, Conductor Resistance Measurement, Corona TestIEC 62271-203, IEC 60060-1IEEE Std C37.20.1, IEEE Std C37.20.2
Boiler Feedwater Pumps & Fan MotorsWinding Resistance Measurement, Insulation Resistance Test, No-Load Current Test, Load Test, Temperature Rise Test, Insulation Withstand TestIEC 60034-1, IEC 60034-2, IEC 60034-5IEEE Std 115, IEEE Std C50.41, IEEE Std C50.42
High-Voltage SwitchgearInsulation Resistance Test, Dielectric Withstand Voltage Test, Contact Resistance Measurement, Mechanical Operation Test, Interlocking TestIEC 62271-200, IEC 62271-1IEEE Std C37.20.1, IEEE Std C37.20.2

Applicable scene

  • Biomass Power Plant
    Biomass Power Plant
  • Coal-fired Power Plant
    Coal-fired Power Plant
  • Oil-fired Power Plant
    Oil-fired Power Plant
  • Waste-to-Energy PlantMSW Incineration
    Waste-to-Energy Plant/MSW Incineration

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