On March 14th, reporters learned from Haihong Electric Co., Ltd. that, led by Guangdong Power Grid Co., Ltd., in conjunction with Haihong Electric, Huazhong University of Science and Technology, North China Electric Power University and Antaike Technology, they successfully developed the world's first 110kV energy-saving amorphous alloy three-dimensional coil oil-immersed power transformer in Kaiping, and passed the full-scale test smoothly. This revolutionary transformer will be put into operation in the 110kV Hongchang Substation in Chaonan District, Shantou City, providing hardcore support for the transformation of China's new power system and setting a new benchmark for the global green revolution of power equipment.
In recent years, Guangdong Power Grid Corporation has been based in Guangdong and has continuously improved the level of green and low-carbon energy technology innovation. Last year, it initiated a project to study the 110kV energy-saving amorphous alloy three-dimensional rolled iron core oil-immersed power transformer, and selected Haihong Electric as the core cooperative R&D partner. The core innovation of the project lies in breaking through the technical difficulties such as super-wide winding of large-size amorphous alloy coil iron cores, annealing of iron cores, and full insulation curing. The new suspension structure invented can realize reliable suspension of more than 10 tons in weight. The low-loss characteristics of amorphous alloy materials and the three-phase magnetic circuit balance of the three-dimensional coil iron core structure. On March 14th, the reporter learned from Haihong Electric Co., Ltd. that, led by Guangdong Power Grid Co., Ltd., Haihong Electric, Huazhong University of Science and Technology, North China Electric Power University and Antaike Technology jointly developed the world's first 110kV energy-saving amorphous alloy three-dimensional coil iron core oil-immersed transformer in Kaiping. The power transformer has successfully passed all the tests. This revolutionary transformer will be put into operation at the 110kV Hongchang substation in Chaonan District, Shantou City, providing hardcore support for the transformation of China's new power system and setting a new benchmark for the global green revolution of power equipment. By combining the two, it has for the first time realized the application of ultra-low loss amorphous materials and three-dimensional rolled iron cores in the 110kV high voltage scenario.
Liang Yazhong, Director of R&D Project Management at Haihong Electric Technology R&D Center: The project is led by Guangdong Power Grid Company, and the material supplier is Antaike Technology Co., Ltd. In addition, Huazhong University of Science and Technology and North China Electric Power University helped us conduct overall material research and structural research, and discussed the implementation methods for subsequent operation and maintenance. In terms of iron core production, we carried out simulation experiments in the early stage and also conducted actual model drills. We went through all the processes. Our production equipment has also been completely updated. Being able to make an amorphous iron core reach 110kV and a capacity of 20000kVA is a very challenging task, and it is a significant technological breakthrough worldwide.
As the first company in the world to start researching on the technology of amorphous alloy three-dimensional coil transformers, Haihong Electric has accumulated profound technical experience after more than ten years of research and development. After taking on the R&D project, under the leadership of the Production Technology Department of Guangdong Power Grid Corporation, the team overcame a large number of technical problems, such as the large-scale coiling process of amorphous alloy strip, annealing technology, and the improvement of the transformer's short-circuit resistance, in just less than a year. They strictly controlled every step of the process, such as the coiling of the iron core and the assembly of the device body, to ensure that the product operates with low noise, strong short-circuit resistance, and long-term safe and reliable operation. During the R&D process, the project team successfully completed product demonstration, design, production, and testing, and applied for more than 10 patents in total.
Liang Yazhong: Traditional transformers are mainly divided into silicon steel cores and amorphous iron cores. The advantage of the amorphous iron core is that its no-load loss is more than 60% lower than that of the silicon steel core. Nowadays, the country wants to build a new power grid dominated by new energy. Whether it is photovoltaic or wind power, or energy storage, under the influence of season and climate, it will lead to the transformer's no-load operation. Therefore, a transformer with low no-load loss is more conducive to the improvement of power generation capacity.
As an important field of carbon emissions, the green transformation of the power industry is crucial to achieving the "double carbon" goal. Taking a transformer with a single capacity of 20000kVA as an example, the annual electricity saving of a 110kV energy-saving amorphous alloy three-dimensional coil oil-immersed power transformer reaches 120,000 kWh, and the reduction of carbon dioxide emissions reaches 72 tons, showing excellent energy-saving effects and environmental advantages. This achievement fills the global technical gap of high voltage amorphous alloy transformers, and will undoubtedly provide strong technical support for the power industry's carbon reduction decisions, help, and help China's energy structure to realize green and low-carbon transformation, and lead the world to open a new era of energy-saving high voltage substation equipment.
