Power Supply Commissioning to Achieve DC Power Control for Superconducting Coils in JT-60SA

The commissioning of the power supplies (PS) for superconducting coils in JT-60SA has started with dummy load in June2019 and all test items have been completed successfully in November 2020. The most important result is that Integrated operation of the various PS components was completed successfully:-High voltage generation of the rated voltage of 5 kV by Switching Network Unit (SNU) [1] was performed as designed.-DC current interruption with rated current by Quench Protection Circuit (QPC) [2] was achieved. These results are the prerequisite for the execution of the integrated PS operation with superconducting coils in JT-60SAand contribute to the PS commissioning for ITER having the similar PS configuration including the SNU.