After managing over 100 UHV transformer projects, I witnessed a technological revolution. Our latest 1100kV design sets new industry benchmarks for efficiency and reliability.

Modern UHV flexible DC transformers require precise integration of electromagnetic design, advanced materials, and intelligent cooling systems to achieve reliable power transmission above 1000kV.

Let me share the critical insights from our groundbreaking development process.

What Are The Engineering Specifications and Technical Parameters?

Leading a team that developed China's first 1100kV flexible DC transformer taught me the importance of precise technical parameters.

These transformers operate at unprecedented voltage levels requiring specialized insulation systems, unique magnetic designs, and advanced cooling solutions.

Core Technical Parameters

Design Requirements

1. Electrical Specifications:

   • Rated voltage: 1100kV DC
   • Power capacity: 5000MVA
   • Efficiency: >99.7%

2. Performance Standards:	Parameter	Requirement
   Basic impulse level	2400kV
   Partial discharge	<10pC
   Temperature rise	<45K

Operating Environment

• Environmental Conditions:
  • Altitude: ≤2000m
  • Ambient temperature: -40°C to +40°C
  • Seismic resistance: Level 8

• Performance Metrics:	Aspect	Specification
  Short circuit durability	2s
  Corona inception	<1.2Um
  Noise level	<85dB

What Is The Basic Product Structure?

Our design breakthrough came from reimagining the traditional transformer structure for ultra-high voltage applications.

The basic structure combines an optimized core geometry, advanced winding configuration, and innovative tank design to handle extreme voltage stresses.

Structural Components

Core Design

1. Magnetic Circuit:

   • Step-lap core construction
   • Domain-refined steel
   • Advanced flux distribution

2. Material Specifications:	Component	Specification
   Core steel	B23P085
   Lamination	0.23mm
   Stacking factor	0.97

Winding Architecture

• Design Features:
  • Interleaved disc windings
  • CTC conductors
  • Optimized cooling ducts

• Construction Details:	Element	Design
  Conductor	CTC copper
  Insulation	Enhanced paper
  Cooling ducts	Radial/axial

What Are The Key Technologies?

Developing this transformer required breakthrough innovations in multiple technical areas.

Key technologies focus on insulation coordination, thermal management, and electromagnetic optimization to ensure reliable operation at extreme voltages.

Critical Technical Innovations

Insulation System

1. Design Features:

   • Multi-layer barriers
   • Optimized electric field
   • Advanced oil gaps

2. Performance Data:	Component	Rating
   Oil BDV	>70kV
   Paper strength	>8kN/m
   Gap design	Computer optimized

Cooling Technology

• System Features:
  • Directed oil flow
  • Enhanced heat transfer
  • Temperature monitoring

• Performance Metrics:	Aspect	Value
  Oil velocity	0.5m/s
  Temperature gradient	<5K
  Cooling efficiency	>95%

Electromagnetic Design

1. Key Innovations:

   • Flux distribution control
   • Loss minimization
   • Impedance optimization

2. Technical Data:	Parameter	Achievement
   Core loss	<0.8W/kg
   Stray loss	<5%
   Short circuit force	Computer controlled

Conclusion

Our successful development of UHV flexible DC transformers demonstrates the power of combining advanced electromagnetic design, innovative materials, and intelligent cooling systems. These transformers now enable efficient power transmission at unprecedented voltage levels.