On June 24, 2025, Beijing Municipal Power Company, led by State Grid Beijing Electric Power Company, in cooperation with Beijing Electric Power Academy, Qingdao Han Cable Company Limited and Qingdao Huadian High Voltage Electric Company Limited, successfully completed the accurate detection, scientific assessment and efficient repair of the first 110kV high-voltage cable ablation defects in Beijing. This marks another major breakthrough in high-voltage cable buffer layer liquid injection repair technology, and the first successful application in the capital power grid.

Water-resistant buffer layer structure in China's high-voltage cable applications accounted for more than 80%, in recent years found that the structure of the cable ablation failure has become a prominent problem affecting the safe operation of the cable, but also become a threat to the safe and stable operation of the power grid of the outstanding stubborn problem. Han cable shares face the industry pain points, after four years of research and development, innovative development of “liquid injection repair technology”. The technology through the special semi-conductive repair fluid precision injection of cable metal jacket and insulation shielding layer gap between the reconstruction of stable radial conductive channel, effectively dispersed and inhibit the local abnormal heat, fundamentally blocking the development of the path of the ablation defects. Successful repair of the damaged cable greatly extended its remaining service life, maximized asset value, and provided strong technical support for the power company to prevent major economic losses.

On March 28, 2025, the buffer layer ablation defect prevention and control technology jointly declared by State Grid Beijing Electric Power Company, Beijing Electric Power Academy, and Han Cable Co. has passed the expert appraisal organized by China Electrical Engineering Society, and the technical level has reached the international leading level. The successful application of this technology practice, combined with the Han cable shares in Xiamen, Jining and other successful application cases, marking the high-voltage cable ablation defects “detection - assessment - repair - operation monitoring” a full set of closed-loop solutions can be engineered application demonstration. The construction of this complete technology chain has completely cleared the technical barriers to the repair of high-voltage cable ablation that have plagued the industry for many years, and established the company's position as the technological leader in the field of high-voltage and ultra-high-voltage cables.

The successful application of the first 110kV high-voltage cable liquid injection repair technology in Beijing is not only a major breakthrough in the core repair technology of high-voltage cables, but also another proof of the company's technological leadership in the field of cable “whole life cycle service”. It marks the successful transformation of Han Cable from a single product supplier to a service provider capable of providing customers with high value-added, high-tech overall solutions.