A high temperature superconductor （HTS） cable system of both a length of 4 metre and a normal current of 2 KA with terminations and a cooling system has been built up and tested. The cable conductor was made of Bi-2...A high temperature superconductor （HTS） cable system of both a length of 4 metre and a normal current of 2 KA with terminations and a cooling system has been built up and tested. The cable conductor was made of Bi-2223 tape. A space maintained vacuum between two corrugated stainless steel tubes functions as the cryostat surrounding the superconductor. A series of tests were carried out to verify the functions of the system. The important data obtained can be used to make longer HTS cable systems.展开更多
China’s first 35 kJ high temperature superconducting magnetic energy storage(SMES)system with an experiment equipment was depicted.The dynamic heat analysis of the magnet of the SMES was conducted through the current...China’s first 35 kJ high temperature superconducting magnetic energy storage(SMES)system with an experiment equipment was depicted.The dynamic heat analysis of the magnet of the SMES was conducted through the current load test on the directly cooled conduction magnet.The research results were as follows:when the converter charges and discharges the magnet for energy storage,the hysteresis loss is the main part of power loss,and contributes significantly to temperature rise;reducing the current frequency at the side of direct current is conducive to restraining temperature rise.The optimizing factors of the cool-guide structure were analyzed based on the heat stability theory,and it was found that the heat transfer of its key part(at the top of the magnet)must be strengthened to reduce the axial temperature difference of the magnet.展开更多
文摘A high temperature superconductor （HTS） cable system of both a length of 4 metre and a normal current of 2 KA with terminations and a cooling system has been built up and tested. The cable conductor was made of Bi-2223 tape. A space maintained vacuum between two corrugated stainless steel tubes functions as the cryostat surrounding the superconductor. A series of tests were carried out to verify the functions of the system. The important data obtained can be used to make longer HTS cable systems.
基金supported by the Hi-Tech Research and Development Program of China (No.2002AA306331-4)the National Natural Science Foundation of China (Grant No.51076013)the Research Fund for the Doctoral Program of Higher Education of China (No.200040487039).
文摘China’s first 35 kJ high temperature superconducting magnetic energy storage(SMES)system with an experiment equipment was depicted.The dynamic heat analysis of the magnet of the SMES was conducted through the current load test on the directly cooled conduction magnet.The research results were as follows:when the converter charges and discharges the magnet for energy storage,the hysteresis loss is the main part of power loss,and contributes significantly to temperature rise;reducing the current frequency at the side of direct current is conducive to restraining temperature rise.The optimizing factors of the cool-guide structure were analyzed based on the heat stability theory,and it was found that the heat transfer of its key part(at the top of the magnet)must be strengthened to reduce the axial temperature difference of the magnet.
