en.Wedoany.com Reported - On June 10, Jiangxi Transformer Technology Co., Ltd., an enterprise in Nanchang Economic and Technological Development Zone, Jiangxi Province, successfully completed all factory tests for the world's first 500kV industrial rectifier transformer, independently developed and manufactured by the company. All items passed the tests in a single attempt, achieving a "zero issues, zero rectification" delivery. This marks a major technological breakthrough in the field of high-end power equipment manufacturing in the zone, providing a new solution for energy saving and cost reduction in large-scale industrial projects.

Rectifier transformers are core power supply equipment for metallurgical and chemical production lines. The industry has long adopted the traditional solution of 220kV equipment paired with step-down substations, which suffers from drawbacks such as high losses, complex supporting systems, large footprint, and high operation and maintenance costs. A mature solution for 500kV industrial rectifier transformers has been lacking. To meet the operational requirements of overseas electrolysis plants with only 500kV power grids, Jiangxi Transformer Technology innovatively designed a 500kV direct step-down to over a thousand volts power supply scheme, eliminating the intermediate step-down substation. This can save hundreds of millions to over a billion yuan in infrastructure investment, improve system operation efficiency by 0.4%, and save large projects over 30 million yuan in electricity costs annually.

Since 2017, Jiangxi Transformer Technology has initiated special technology pre-research. Without mature cases for reference, it tackled key technologies such as ultra-high voltage insulation matching, harmonic suppression, and stable operation under high currents. The prototype was fully supervised and tested by the National Transformer Quality Supervision and Inspection Center, with all core indicators including temperature rise, losses, partial discharge, and withstand voltage exceeding national and industry standards. This equipment is customized for a large overseas multinational metal smelting project and is the first prototype of a batch of eight units. The successful one-time trial production and testing have laid a solid foundation for mass production, quality control, and on-time delivery. "We have cooperated with Jiangxi Transformer Technology for over 30 years, and it has been excellent in terms of both price advantage and quality reliability. The 500kV voltage level is relatively high, and using it can directly eliminate the intermediate step-down substation, reducing maintenance costs," said Mi Quanpu, an electrical engineer from Xinfa Group.

This major technological breakthrough not only fills the gap in the industrial application of ultra-high voltage industrial rectifier equipment but also provides a replicable and scalable solution for energy-saving retrofits, power supply system upgrades in large industrial projects, and overseas project output. In the next step, Jiangxi Transformer Technology will use this qualified prototype as the benchmark for finalization, solidify the entire production process, orderly advance the production, assembly, and commissioning of the remaining equipment, ensure quality and quantity to complete project delivery, and continuously promote the transformation and upgrading of industrial power equipment towards high-end, green, and intelligent development.

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