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Deep Analysis of HV Transformer Working Principle

High voltage transformers operate on electromagnetic induction principle. When AC current flows through primary winding, alternating magnetic flux in the core induces voltage in secondary winding. Junling's technological innovations ensure efficient power transmission:

Core Working Process:

1.Electromagnetic Induction

oOriented silicon steel core with magnetic density up to 1.8T

oThree-step lap joint reduces no-load loss by 25%

2.Insulation System

oMulti-layer crepe paper & oil composite insulation

o230kV power frequency withstand, 650kV lightning impulse

3.Cooling Circulation

oOFAF (Oil Forced Air Forced) cooling system

oOptimized radiator surface, temperature rise ≤45K

Junling HV Transformer Technical Highlights

Magnetic Circuit: Step-lap core, noise ≤65dB

Winding Process: Continuous winding, axial pressure ≥3.5MPa

Insulation Coordination: Field optimization, max field strength ≤2.8kV/mm

Smart Monitoring: Built-in DGA online monitoring

Typical Applications

500kV EHV substations

Large hydropower step-up systems

Renewable energy collection stations

Cross-border transmission projects

Technical Parameters (550kV Class)

Rated Capacity: 300MVA

No-load Loss: 85kW

Load Loss: 950kW

Impedance Voltage: 18%

Sound Level: 68dB