Laying Technology and Scenario Applicability Analysis of High Temperature Superconducting Cable

With the rapid development of the second generation of high temperature superconducting strip, countries around the world began to explore the application of superconducting cable in the power grid, and a number of demonstration lines have been built. The future large-scale application of superconducting cables will face different application scenarios and laying methods. This paper summarizes the main laying methods of relevant projects at home and abroad, analyzes the typical laying methods of superconducting cables and the main influencing factors, proposes the corresponding chilling shrink design and the integrated construction method of “traction-transport-sending” according to the cold shrinkage characteristics of superconducting cables, summarizes the characteristics and application scenarios of laying methods of superconducting cables such as direct burial, duct bank, cable trench and tunnel. It provides guidance for the selection of laying method of superconducting cable in the stage of popularization and application. When superconducting cables are used for long-distance transmission, considering the comprehensive reliability, operation mode and cooling shrinkage response, priority can be given to the laying method of duct bank, cable trench or tunnel, and combining the actual situation along the channel and the countermeasures of shrinkage to optimize the design of corner well and joint well.