Stability and Reliability Analysis of High-Power Magnet Power Supply Based on Long Pulse Operation of CRAFT

High-power converter power supply system is built to meet the requirements of continuous improvement of long pulse parameters. In order to maintain the stability of high-power power supply system under long pulse operation, based on the Comprehensive Research Facility for Fusion Technology (CRAFT) magnet power supply system, this article proposes optimized control strategy to promise the reliability and safety. To further enhance the control strategy, this article employs a genetic algorithm (GA) for tuning the proportional-integral-derivative (PID) parameters. GA is utilized as an optimization technique to fine-tune the proportional, integral, and derivative parameters, aiming to achieve optimal performance and stability in the power supply system. In addition, this article analyzes the three parallel operation modes in detail, including the basic principle explanation under each operation mode, the trigger angle range, control strategy analysis, and current ripple analysis are given. This comprehensive approach not only contributes to the understanding of operation of the power supply system but also integrates advanced optimization techniques, ensuring efficient and stable performance during extended pulse operations.