Core Insights - The State Grid DC Technology Center has developed a high-performance impregnated paper insulation technology for ultra-high voltage converter transformer bushings, achieving international leadership and recognized as a world-first innovation [1][2] Group 1: Technology Development - The new technology replaces traditional oil-immersed paper insulation with impregnated paper, eliminating safety hazards such as abnormal gas generation and reducing the risk of porcelain bushing explosions [1][2] - The project team overcame key technical challenges related to large-size core materials, design, and processes, establishing a complete independent intellectual property technology system [2] Group 2: Performance and Application - The new impregnated paper bushings have surpassed existing insulation levels, partial discharge levels, and current-carrying capacity, with strict testing criteria [2] - As of now, 258 units of 550kV and 800kV bushings have been successfully applied in engineering, with 154 units in operation showing zero defects [2] Group 3: Industry Impact - This breakthrough addresses technical bottlenecks in DC safety operation, providing strong support for the construction of ultra-high voltage projects during the 14th Five-Year Plan [2] - The development is significant for promoting energy technology revolution and aiding in achieving carbon neutrality goals [2]