Research Plan on Multi-Dimensional Technologies of Distribution Transformers

I. Research Background and Objectives Background

The new power system places higher demands on transformer energy efficiency (as required by the national standard GB 20052-2020), intelligence (in accordance with the IEC 61850 standard), and environmental friendliness (SF6 substitution).
The new challenges brought about by the integration of new energy sources, such as harmonic tolerance and DC biasing.
Core objective
Establish a multi-physics field coupling model for transformers (electromagnetic – thermal – mechanical)
Development of a new type of core material application solution with a reduction of development losses by more than 15%
Verify the feasibility of the vegetable oil insulation system in the ±800kV ultra-high voltage scenario

II. Key Technology Roadmap

1. Electromagnetic Characteristics Research

3D transient magnetic field simulation based on ANSYS Maxwell
Loss comparison experiment between silicon steel sheet (B30P105) and amorphous alloy (1K101)
Analysis of excitation current distortion under DC magnetic bias condition (0.5 A/cm²)

2. Thermal Management Optimization

Establish a CFD thermal model for the oil-immersed transformer (with a flow rate of 0.3 m/s)
Thermal conductivity test of the new nano-fluid coolant (Al₂O₃/oil)
Hotspot temperature prediction algorithm (LSTM neural network, error < 2K)

3. Mechanical Reliability

Short-circuit force calculation (in accordance with IEC 60076-5 standard)
Winding deformation online monitoring (fusion diagnosis based on vibration method and frequency response method)
Seismic resistance design (with an acceleration spectrum of 0.3g as stipulated by IEEE 693)

III. Experimental Design

1. Prototype Testing Platform

Build a 630kVA dry-type transformer test system
Equipped with:
Harmonic injection device (with adjustable harmonic content ranging from 0% to 15%)
Partial discharge detector (sensitivity 1 pC)
Infrared thermal imager (resolution 0.03℃)

2. Accelerated aging experiment

Carry out the thermal aging test in accordance with IEC 60076-14
Study on the Correlation between the Degree of Polymerization of Insulating Paper (DP Value) and Breakdown Voltage

IV. Innovative Research Points

Dynamic Load Balancing and Capacity Adjustment Control Based on Deep Reinforcement Learning
Research on the Dielectric Properties of Graphene-Doped Paper Insulating Materials
Application of Voiceprint Recognition Technology in Early Warning of Oil Chromatography Abnormalities

V. Deliverables

Technical Report: Includes simulation data, experimental records and optimization plans
Patent: At least 2 core technological innovation patents
Prototype: Demonstrative transformer certified by KEMA

VI. Project Cycle and Budget

Phase Time Primary Tasks Budget Percentage
Theoretical Research 3 months Model establishment and simulation 20%
Material Development 5 months Optimization of amorphous alloy processing technology 35%
Prototype Testing 4 months Type testing and certification 45%

VII. Risk Assessment and Mitigation

Electromagnetic Compatibility Issues: Increase redundancy in shielding layer design
Insulation failure: Utilizing a multi-sensor fusion monitoring approach
Cost overruns: Establishing a joint development mechanism with material suppliers such as Baosteel