Special Transformer Solutions with Structural Optimization and Advanced Processes

Ⅰ. Core Challenges and Innovation Approach
Traditional transformers are constrained by structural redundancy, material performance bottlenecks, and insufficient process precision, failing to meet demands in specialized scenarios (e.g., space-constrained, high short-circuit risk, harsh environments). This solution achieves performance leaps and scenario adaptability through 3D structural optimization, cutting-edge material upgrades, and precision process innovations.

II. Key Solution Highlights
(1) Structural Innovation: Modularity and Enhanced Functionality

1. Shell-Type Structure

• Applications: Urban underground substations, offshore wind power step-up transformers, compact data centers
  
  

• Advantages:
  Uniform magnetic flux distribution, short-circuit withstand capacity ↑30%–40%
  20% smaller volume than core-type structures, ideal for height-limited spaces

2. Foil Winding Technology

• Applicable Types: Distribution transformers, rectifier transformers, mining-specific transformers

• Innovative Value:
  Axial heat dissipation area ↑50%, temperature rise ↓15–20K
  Evenly distributed short-circuit electrodynamic forces, withstand capacity ↑25%

3. Split Winding/Phase-Shifting Winding
Core Functions:

• 18-pulse/24-pulse phase-shifting design suppresses 5/7/11th harmonics, THD <3%

• Multi-channel isolated output (e.g., electroplating power supplies), voltage deviation &le;0.5%

4. Compact Modular Design
Process Integration:

• Split tank + on-site argon arc welding sealing

• Transport unit weight <80 tons, suitable for mountainous/island terrains

(2) Material Innovation: Performance and Sustainability Breakthroughs

(3) Process Innovation: Precision Manufacturing and Lifecycle Assurance

1. Vacuum Pressure Impregnation (VPI)

• Deep epoxy resin penetration (vacuum level <50Pa)

• Insulation layer porosity &asymp;0, partial discharge <5pC

2. Step-Lap Core Stacking

• 45&deg; mitered joints laser-aligned, gap <0.1mm

• Results: No-load loss &darr;10%&ndash;15%, noise &le;55dB(A)

3. High-Precision Welding

• Laser/robotic automated welding

• Weld strength consistency >99% Leakage rate <0.1%

4. Digital Pre-Integration

• Built-in fiber-optic temperature (DGA) + vibration sensor interfaces

• Enables real-time health assessment via digital twin systems

III. Target Achievements

IV. Application Scenario Validation

1. Renewable Energy Plants: Shell-type + split winding design &rarr; Resolves harmonic disturbances and frequent short-circuit impacts.

2. Underground Smart Substations: Fluorinated fluid cooling + compact modularity &rarr; Zero fire risk &middot; Maintenance-free for >10 years.

3. Offshore Wind Platforms: Lightweight Al alloy + step-lap stacking &rarr; Salt mist corrosion resistance &middot; No-load loss <0.15%.