Low time step real time simulation of parallel connected neutral point clamped three level inverters

In this paper real time simulation of two parallel connected neutral point clamped three level inverters is achieved. The proposed work makes use of Time Stamped Bridge model of inverter available in a real time simulation tool to reduce the time step of simulation. The Time Stamped Bridge is modelled using MATLAB S-function code. Consequently, the model is computationally more efficient. Moreover, the model can accommodate firing pulses appearing between two time steps. Thus, the real time simulation has no loss of accuracy and works like a physical system.