Predictive current control for voltage source inverters considering dead-time effect

摘要

This paper proposes a new concept of synthesized voltage vector to address dead-time effect issue for Finite Control Set Model Predictive Control (FCS-MPC) technique. For a voltage source inverter (VSI), dead-time is inevitably inserted between the turn off and turn on instants of power devices to avoid short circuit phenomenon. The influence of dead-time leads to output voltage vector error of three-phase inverters. Furthermore, it will result in computing deviation in cost function, and will deteriorate the performance of the system if not properly dealt with. In this paper, the problem is clearly analyzed, and the solution to this issue is proposed by introducing a synthesized voltage vector. The proposed solution is verified by Hardware-in-the-loop (HiL) test in real time, and results validate the effectiveness of the proposed solution.