The platform adopts a proven distributed simulation architecture as the controlled plant: one master simulator simulates the front-end cascaded H-bridge with a 1 μs time step, and one slave simulator simulates the back-end high-frequency DC-DC converter with a 100 ns time step. The two simulators exchange data through fiber optics and are kept in strict synchronization by clock synchronization lines.

The solution uses the Modeling Tech dedicated SST prototype controller MT 1090. Users only need to complete the control algorithm modeling in the Simulink environment and can compile and download it to the MT 1090 with one click, making it the physical controller that carries the user algorithm. Through high-speed fiber and physical I/O interfaces, the MT 1090 acquires full-system state information from the simulators in real time (such as grid-side voltage and current, sub-module voltages and DC-side voltage), executes the user algorithm, and generates control commands such as front-end PWM pulses and back-end phase-shift angles. The front-end PWM is generated directly by the MT 1090 and sent to the master simulator through fiber to drive the switching model; the back-end phase-shift command is sent to the slave simulator through fiber, where the gate drive signals are generated locally, thus forming a complete algorithm-in-the-loop test closed loop.