35kV amorphous alloy transformer

　　Technical Analysis and Application Prospects of 35kV Amorphous Alloy Transformers

　　1. Technical Overview

　　The 35kV amorphous alloy transformer is a distribution transformer that employs amorphous metallic materials (e.g., iron-based amorphous alloys) for its core. Its core advantages lie in extremely low no-load losses and high energy efficiency. According to the Chinese national standard Technical Parameters and Requirements for Dry-Type Amorphous Alloy Core Distribution Transformers (GB/T 22072-2018), this type of transformer is suitable for distribution systems with nominal voltages of 35kV and below, and rated capacities ranging from 30kVA to 2500kVA. It is particularly well-suited for applications with stringent energy efficiency and environmental requirements.

　　2. Core Technical Advantages

　　Ultra-Low No-Load Loss

　　The atomic structure of amorphous alloy materials is disordered, resulting in minimal energy consumption during magnetization and demagnetization processes. Compared to traditional silicon steel transformers, no-load losses can be reduced by 60%-70%. For instance, a 35kV amorphous alloy transformer may exhibit no-load losses as low as 30% of those in silicon steel transformers, significantly reducing operational costs.

　　Energy Efficiency and Environmental Benefits

　　Energy Conservation: In China, widespread adoption of amorphous alloy transformers in distribution networks could achieve annual energy savings of 25-30 TWh, equivalent to reducing coal consumption by approximately 20 million tons of standard coal.

　　Emission Reduction: Annual CO₂ emissions could be reduced by 20-30 million tons, contributing to carbon neutrality goals.

　　Structural Innovation and Stability

　　Core Design: Utilizes a three-phase, four-frame, five-column structure. Monolithic rectangular frames are wound from amorphous alloy strips and combined to form a closed magnetic circuit, minimizing magnetic resistance and eddy current losses.

　　Winding Optimization: The low-voltage winding adopts a foil-type structure, while the high-voltage winding employs a layered, segmented design separated by rectangular insulating end rings, enhancing short-circuit withstand capability.

　　Mechanical Stress Control: Incorporates U-shaped spacers and oil gap supports to prevent performance degradation due to core stress, reducing noise levels to 45-55 dB, meeting environmental requirements.

　　3. Application Scenarios

　　Power Systems

　　Substation Upgrades: Ideal for retrofitting 35kV substations to enhance distribution network efficiency.

　　Renewable Energy Integration: Reduces transmission losses in wind and solar power plants, improving the utilization of renewable energy.

　　Industrial Sectors

　　Energy-Intensive Industries: Such as petrochemicals and metallurgy, where energy savings can significantly lower production costs.

　　Data Centers: Provides stable, low-loss power support for high-density computing equipment.

　　Urban Infrastructure

　　Rail Transit: Reduces energy waste in subway and light rail power supply systems.

　　Commercial Complexes: Lowers distribution losses for HVAC, lighting, and other equipment, enhancing building energy efficiency ratings.

　　4. Economic and Environmental Benefits

　　Life Cycle Cost (LCC): Although initial investment costs are 10%-20% higher than those of silicon steel transformers, operational energy savings enable cost recovery within 3-5 years.

　　Policy Support: Aligns with China’s "dual carbon" strategy, qualifying for energy-saving subsidies, tax incentives, and green procurement policies.

　　Social Benefits: Drives energy transition, reduces reliance on fossil fuels, and promotes circular economy development.

　　5. Technological Development Trends

　　Material Science Breakthroughs: Development of amorphous alloy materials with higher saturation magnetic flux density and lower losses to further enhance energy efficiency.

　　Intelligent Manufacturing: Adoption of automated winding, laser welding, and other processes to improve production efficiency and product consistency.

　　Integrated Design: Combination with three-dimensional wound core technology to develop 35kV and higher voltage-class amorphous alloy power transformers, expanding application scenarios.

　　6. Conclusion

　　The 35kV amorphous alloy transformer, with its exceptional energy-saving performance, environmental friendliness, and technological maturity, has emerged as a critical device for upgrading medium-voltage distribution networks. As global demands for energy efficiency and environmental protection escalate, market demand for these transformers is poised for sustained growth, providing vital support for the green transformation of power systems.