2024 Annual Comprehensive Lean Maintenance of Hami-Zhengzhou DC Fully Launched

"According to the dispatch order, we are now conducting the bipolar DC system switching operation for maintenance. Please take your positions and thoroughly check the equipment status." On September 24, as the maintenance team completed the power-off operation for the bipolar DC system at the Tianshan converter station of the Hami-Zhengzhou ±800 kV UHVDC transmission project (referred to as the "Hami-Zhengzhou DC"), a massive operation involving a thousand personnel kicked off.

Comprehensive maintenance site

The Hami-Zhengzhou DC, which begins at the Tianshan converter station in Hami City, Xinjiang, and ends at the Zhongzhou converter station in Zhengzhou, Henan Province, serves as Xinjiang's first UHVDC transmission project and the first UHV transmission line built in the northwest region. Since its commissioning in January 2014, it has been operational for 10 years. This maintenance marks the project's eleventh year of maintenance.

Comprehensive maintenance site

Comprehensive maintenance site

Comprehensive maintenance site

Comprehensive maintenance site

For this comprehensive maintenance work, the State Grid Xinjiang Electric Power Co., Ltd. has reasonably implemented a well-structured maintenance approach, scientifically assessed the equipment status, and fully optimized the maintenance strategy. While ensuring the safe equipment operation, the company has further improved the predictability, focus, and effectiveness of the maintenance projects. By sorting out tasks in advance, optimizing maintenance procedures, strengthening organizational coordination, and efficiently allocating maintenance resources, it has maximized maintenance efficiency, enhanced equipment health, and ensured the smooth operation of the power transmission channel from Xinjiang. (Text/Photo by Chen Kai, Chen Yao, Wang Xiaofu)