The converter transformer for the Mengxi–Jingjinji ±800 kV UHV DC project manufactured by China XD passed all factory tests at once

The Mengxi–Jingjinji ±800 kV UHV DC transmission project is a core inter-provincial power transmission corridor supporting China's "desert, gobi, and wasteland" new energy bases. It undertakes the important mission of transmitting power from Inner Mongolia's clean energy-rich bases and ensuring the electricity supply security of the Beijing–Tianjin–Hebei load center. The project innovatively adopts a hybrid transmission technology of "conventional DC at the sending end + flexible DC at the receiving end," with the converter capacity of both stations reaching 8,000 MW. With its large transmission scale, novel technical model, and high engineering standards, it is a benchmark project in the construction of new-type power systems.

In response to the project's stringent requirements for high reliability, high adaptability, and high economic efficiency, the company's technical team delved into the core technology of single-phase double-winding converter transformers, optimized the electrical design scheme, iterated the overall structural layout, and refined the manufacturing processes. They specifically addressed technical challenges such as operational adaptability, loss control, and insulation stability of converter transformers with large capacity and high voltage levels, making every effort to ensure the product adapts to the project's complex operating conditions.