Design of a New 14-MW Highly Stabilized Power Supply at the CHMFL

A new 14-MW highly stabilized power supply is being designed and constructed, which will be operated in parallel with the existing 28-MW power supply to increase the total electric power to 42 MW, to energize the 42-T water-cooled resistive magnet under design at the High Magnetic Field Laboratory, Chinese Academy of Sciences (CHMFL) in Hefei. For the new 14-MW power supply, a 10-kV static var generator (SVG) is designed to replace the traditional power factor correction technology used fixed capacitor banks. The SVG can dynamically improve the power factor and stabilize the grid voltage. A novel series active filter based on high-frequency switching power supply is designed, which is expected to further reduce the current ripple to less than 10 ppm with lower loss and easier control mode. Water-cooled dry-type rectifier transformers will also be applied to the new 14-MW power supply, which can improve the operation safety and maintainability of the power supply. In addition, some optimization design of the new 14-MW power supply will also be mentioned in this article.