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Testing and Commissioning of a 135 MW Pulsed Power Supply at the Wuhan National High Magnetic Field Center

2014; IEEE Council on Superconductivity; Volume: 24; Issue: 3 Linguagem: Inglês

10.1109/tasc.2013.2292305

1558-2515

Hongfa Ding, Yuan Yang, Yun Xu, Chengxi Jiang, Liang Li, Xianzhong Duan, Yuan Pan, Jihui Hu,

Magnetic confinement fusion research

At the Wuhan National High Magnetic Field Center, two 67.5-MW pulsed power supply units have been installed to energize long-pulse magnets. Each unit based on a 12-pulse converter consists of two 6.9 kV/1.2 kV (1.0 kV) cast coil transformers and two six-pulse rectifiers connected in series. The units are connected to a 100 MVA/185 MJ inertial energy storage motor-generator set and can operate independently as well as in parallel or in series. Each unit is designed to provide no-load voltages of 3.2 kV (2.7 kV) and full-load voltages of 2.7 kV (2.25 kV) at the rated current of 25 kA for a 3-s pulse once every half hour. After completion of various performance tests, the power supply commissioning started in October 2012. At present, the power supply has energized a long-pulse magnet more than 100 times to produce flat-top pulses at various field levels, including a 50-T field pulse with 100-ms flat-top duration. In this paper, the final design of the power supply components is described in detail. Testing and commissioning results of the power supply taken with a dummy load and a long-pulse magnet are also presented.