Simulation of Ohmic Heating Power Supply for HL-2M

To verify the feasibility of Ohmic heating power supply design for HL-2M, simulation study based on Simulink is carried out. The simulation model includes 300-MVA six-phase motor generator, transformers, converters, crowbar, cable, and load. The models of transformers, converters, and control system are built in detail. The impedance of ac side that includes the one of generator, transformers, and cables is estimated. The inductance of interphase reactor is calculated and selected to ensure the current balance in parallel mode and restrain circulating current in circulating current mode. The normal operation and protection strategy of possible faults are discussed. The simulation and analysis results show that the circuit topology is feasible. Output curve is reasonable through optimizing control and circuit parameters.