Amorphous alloy oil-immersed transformer

　　Non-Crystalline Alloy Oil-Immersed Transformers: Core Equipment for Energy Conservation and Industry Development Trends

　　I. Technical Principles: Material Innovation Driving Energy Efficiency Breakthroughs

　　The core of non-crystalline alloy oil-immersed transformers lies in the use of non-crystalline alloy strips instead of traditional silicon steel sheets as the iron core material. Non-crystalline alloy is formed through an ultra-rapid cooling and solidification process, resulting in an atomic disordered arrangement structure with a thickness of only 0.027-0.03 mm. It possesses the following characteristics:

　　Low Loss: Magnetic hysteresis loss is reduced by 70%-80% compared to silicon steel, with a resistivity three times higher, leading to a 50%-75% decrease in no-load loss.

　　High Magnetic Permeability: Low magnetization power and no structural defects impeding domain wall movement, making it suitable for low-load and fluctuating load scenarios.

　　Structural Optimization: Adopting a three-column three-dimensional wound iron core structure eliminates magnetic resistance mutations at traditional lamination joints, further enhancing energy efficiency when combined with vacuum oil immersion processes.

　　Typical Cases:

　　SH15-M Series: No-load loss decreased by 65%-75% compared to S13 silicon steel transformers, meeting national first-class energy efficiency standards.

　　110 kV Energy-Saving Three-Dimensional Wound Iron Core Transformer: No-load loss reduced by over 60% compared to the first-class energy efficiency limit specified in GB 20052-2024, with comprehensive performance reaching international leading levels.

　　II. Performance Advantages: Double Wins in Whole-Life Cycle Costs and Environmental Benefits

　　Significant Energy-Saving Effects

　　For a 1000 kVA transformer, the no-load loss of a traditional silicon steel transformer is approximately 1500 W, while that of a non-crystalline alloy transformer can be reduced to below 400 W.

　　Case Study in an Industrial Park: After replacement, the annual no-load loss electricity decreased by 12,600 kWh, saving over RMB 8,000 in electricity costs.

　　Application in a Commercial Complex: The overall efficiency of the power distribution system increased by 2.3%, saving over RMB 500,000 in electricity costs annually.

　　Low Whole-Life Cycle Costs

　　Short Payback Period: Under a 30% load rate condition, the payback period is only 3.8 years.

　　Long-Term Economic Efficiency: Over a 20-year service life, the total cost is 30%-45% lower than that of ordinary transformers.

　　Outstanding Environmental Contributions

　　Case Study of a Municipal Power Supply Company: After replacing 125 transformers, annual carbon emissions decreased by 3,360 tons.

　　Application in Photovoltaic Power Plants: Nighttime no-load loss reduced by 76%, increasing annual power generation revenue by RMB 1.2 million.

　　Strong Adaptability

　　Temperature Range: -25°C to +40°C (special models can reach -40°C).

　　Humidity Tolerance: ≤95% (non-condensing), suitable for salt spray and humid environments.

　　Short-Circuit Resistance: The three-dimensional wound iron core structure enhances short-circuit resistance by three times.

　　III. Application Scenarios: Covering Diverse Power Demands

　　Urban Power Distribution Networks

　　With significant day-night load fluctuations, non-crystalline alloy transformers can significantly reduce no-load loss and improve power supply stability.

　　Case Study in an Urban Substation: Noise levels decreased from 55 dB to 48 dB, meeting environmental requirements in residential areas.

　　New Energy Sector

　　Photovoltaic Power Plants: Adapts to day-night power generation characteristics, reducing energy consumption under low-load conditions.

　　Offshore Wind Power Platforms: Lower operating temperatures (15°C lower than silicon steel transformers) extend equipment lifespan, with a 40% reduction in failure rates.

　　Industrial and Commercial Sectors

　　Factories, Schools, Hospitals: Under 24-hour continuous operation scenarios, load loss is comparable to that of silicon steel transformers, but no-load loss advantages are significant.

　　Data Centers: When frequent overloading is required, silicon steel transformers have lower temperature rises, but non-crystalline alloy transformers offer better economic efficiency under low-load rates.

　　Special Environments

　　High-Altitude and High-Humidity Areas: Through sealed designs and material optimization, insulation performance remains stable.

　　Frequent Switching Locations: Such as airports and docks, they exhibit strong impact resistance and low maintenance costs.

　　IV. Market Status: Concurrent Expansion in Scale and Technological Iteration

　　Market Size

　　Global: In 2021, the market size for non-crystalline alloy transformers was approximately RMB 5.6 billion, with non-crystalline alloy oil-immersed transformers accounting for 86% of production volume.

　　China: It has become the world's largest producer of non-crystalline alloy strips, with oil-immersed transformers accounting for about 85% of annual production.

　　Technological Trends

　　High Voltage: The 110 kV energy-saving transformer has overcome challenges in developing non-crystalline alloys for high-voltage, large-capacity applications.

　　Intelligence: Integration of functions such as temperature monitoring, vibration detection, and oil quality analysis enables predictive maintenance.

　　Green Manufacturing: The establishment of a non-crystalline strip recycling system has reduced waste rates from 15% to 5%, promoting a circular economy.

　　Competitive Landscape

　　Domestic Enterprises: Companies such as Zhongke Electric Power, Haihong Electric, and Jiangsu Yangdian lead in energy-saving technologies and cost control.

　　International Competition: Domestic enterprises need to strengthen technological innovation and brand building to cope with competition from international companies.

　　V. Selection and Operation & Maintenance: Key Parameters and Management Points

　　Selection Decisions

　　Energy Efficiency Indicators: Prioritize models with low no-load loss and reasonable load loss.

　　Environmental Adaptability: Select products with special designs based on temperature, humidity, and altitude conditions.

　　Economic Analysis: When the load rate consistently exceeds 75%, compare total losses with those of silicon steel transformers.

　　Operation & Maintenance Management

　　Installation Specifications: After transportation, allow for a 24-hour static period, with a tilt angle ≤15° and a grounding resistance ≤4 Ω.

　　Operation Monitoring: The top oil temperature should not exceed 95°C, and vibration acceleration sensors can warn of iron core loosening.

　　Maintenance Strategy: Clean radiators every six months, inspect rubber pad aging annually, and conduct preventive tests including winding DC resistance tests (deviation ≤2%).

　　VI. Future Prospects: Integration of Green Power and Intelligence

　　With the advancement of the "dual carbon" goals, non-crystalline alloy oil-immersed transformers will exhibit the following trends:

　　Technological Upgrades: Development of higher voltage level products (such as 220 kV and 500 kV) to expand application scenarios.

　　Intelligent Integration: Combining with IoT technology to enable remote monitoring and autonomous optimization.

　　Global Layout: Domestic enterprises will enhance their international market share through technology exports and local production.

　　Policy-Driven: Energy-saving subsidies and carbon trading mechanisms will further accelerate the popularization of non-crystalline alloy transformers.

　　Conclusion

　　Non-crystalline alloy oil-immersed transformers have become key equipment for the green transformation of modern power systems due to their exceptional energy efficiency, environmental performance, and economic efficiency. From urban power distribution networks to new energy power plants, from industrial parks to special environments, their application boundaries continue to expand. In the future, with the deep integration of material science and electrical engineering, this technology will continue to lead the transformer industry toward higher efficiency, intelligence, and sustainability.