关键词: HL-3 装置, 超级电容, 级联 H 桥, 中心螺线管电源, 匹配性仿真

Abstract:  In order to meet the high parameter power supply demand of HL-3 tokamak, the preliminary design of 150MW supercapacitor energy storage system (SESS) and the matching simulation study of power supply to the central solenoid (CS) power system were carried out. The energy storage system is designed with cascaded H-bridge structure based on carrier phase-shift modulation. After verifying the rationality of the overall parameter design of the energy storage system through modeling and simulation, the virtual discharge experiment of the energy storage system supplying power to the central solenoid power supply is carried out. The experimental results show that the AC output side of the energy storage system needs to be connected with a filter with appropriate parameters in series, which can not only reduce the AC harmonic content, but also facilitate the successful large current inversion of the CS power converter and realize the four quadrant operation of the CS power supply; In addition, the designed super capacitor energy storage system can absorb the energy fed back during the CS power inverter process, and the output voltage fluctuation is less than 7%. All parameters during the discharge operation meet the system performance requirements. The simulation model can be used as a research platform for subsequent verification of complex control strategies.

Key words: HL-3 tokamak, Supercapacitor, Cascade H-bridge, Central solenoid power supply, Matching simulation