Quench Detection and Protection of an HTS Coil

[摘要] A pulsed, modular HTS magnet for energy storage applications was constructed and tested. Charge and discharge pulses were accomplished in about 1 second. A recuperative cryogenic cooling system supplies 42 to 80 Kelvin helium gas to the magnet. A practical solution to overvoltage and overcurrent protection has been implemented digitally using LabVIEW. Voltages as little as 46 μV greater than the expected value trigger the protection system, which stops the pulse profile and begins an immediate current ramp down to zero over 1 second. The protection system has displayed its effectiveness in HTS transition detection and damage prevention. Experimentation has demonstrated that current pulses on the order of seconds with amplitudes of up to 110 Amps can be achieved for extended periods. Higher currents produce joint heating in excess of the available cooling from the existing cryogenic system.

[发布机构] University of Wisconsin, Madison; WI; 53706, United States^1;NDI Engineering Company, Thorofare; NJ; 08086, United States^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Charge and discharge;Cryogenic cooling system;Damage preventions;Energy storage applications;Practical solutions;Protection systems;Quench detection;Transition detection