Experimental analysis of dummy load prototype for ITER coil power supply system

摘要

This paper basically introduces the experimental analysis of the dummy load prototype, which aims to verify the capability of the ITER magnetic power supply systems to operate at their rated power levels without energizing the superconducting coils. The rated inductance of dummy load is 6.73mH and the pulse test currents are 45 kA, 55 kA and 68 kA. According to the requirements of the large inductance and different pulse test current classes, a dry-type air-core water-cooling prototype with epoxy resin casting technique has been fabricated, which has 24 layers and 72 turns. The experimental analyses, including the consistency test, inductance test, and temperature rise test are described in detail. The consistency of different coil layer is ensured by comparing the voltage wave under the same voltage excitation. The inductance test includes dc inductance test by using the first order circuit method and ac inductance test by LCR instrument and finite element simulation analysis. The temperature rise test results under different current classes are introduced by comparing with the simulation analyses. The above experimental results are coincided with the requirements, which shows the feasibility and availability of the prototype.