Recently, the Xiangyang Guanyinge (Panggong) 220 kV power transmission and transformation project, designed by Hubei Engineering Company and the first domestic transmission line project to use a suspended telescopic arc device, was put into operation and began transmitting power, providing breakthrough technical reference and exemplary support for subsequent urban bridge-attached power cable projects in China.

The line portion of the Xiangyang Guanyinge (Panggong) 220 kV power transmission and transformation project is the first domestic transmission line project to use a suspended telescopic arc device. Once put into operation, it will greatly enhance the power supply capacity and reliability of Xiangcheng District, provide strong guarantees for residents' electricity use in the relevant areas, and improve green power transmission capacity. The project will also further optimize the power grid structure in the relevant areas, laying a solid foundation for building the provincial cross-city Hubei North (Suizhou, Xiangyang) New Power System Pioneer Zone.

The suspended telescopic arc device used in the project was independently developed and designed by the design institute affiliated with Hubei Engineering Company, setting a domestic precedent in transmission line projects. Faced with difficulties such as demanding bridge installation conditions and space requirements, and the high cost of telescopic devices used in existing bridge-crossing power cable projects, the design institute affiliated with Hubei Engineering Company decided to independently develop a new type of telescopic device.

During the engineering design process, team members went to the site multiple times to collect data and conduct surveys, and carried out comprehensive research on existing domestic and international finished telescopic arc products for bridge-attached installation. After a four-year series of processes including parameter setting, simulation modeling, scheme design, and test platform construction, the suspended telescopic arc device independently developed by Hubei Engineering Company successfully passed experimental testing in May 2023 and was certified as qualified. While ensuring the quality and effectiveness of the bridge telescopic device, the design effectively solves the problem of bridge-attached installation, providing breakthrough technical support for subsequent urban bridge-attached power cable projects in China.