Abstract
In this paper, the model predictive current control (MPCC) method using two vectors has been proposed to control output currents of three-phase voltage source inverters (VSIs) with small current errors and current ripples. Also, the proposed method can reduce switching losses by applying the vector pre-selection technique to the MPCC for the VSI. The VSI generates seven voltage vectors to control the output currents, but the proposed method uses four available voltage vectors with one switch, which are classified by the vector pre-selection method clamping one leg and conducting the largest output current among the three legs to reduce the switching losses. In the proposed method, selecting two future voltage vectors among the four voltage vectors and dividing them in a future sampling period are determined by an optimization process. The proposed method results in the lower total loss, better total harmonic distortion (THD), and smaller current errors than the conventional method with half the sampling period of the proposed method due to the optimal process. Simulation and experimental results of the three-phase VSIs are presented in order to verify the effectiveness of the proposed method.
Highlights
In the last few decades, the control schemes for voltage source inverters (VSIs) have been presented and widely studied [1,2].The typical control schemes for voltage source inverter are hysteresis control and linear control with pulse width modulation (PWM)
The VSIs can be controlled by using the model predictive control, which predicts the finite number of the future output current behaviors based on the load dynamic model
This paper proposes a switching strategy, that is, the vector pre-selection technique to obtain high efficiency [23], and the model predictive current control method based on Electronics 2019, 8, 625; doi:10.3390/electronics8060625
Summary
In the last few decades, the control schemes for voltage source inverters (VSIs) have been presented and widely studied [1,2].The typical control schemes for voltage source inverter are hysteresis control and linear control with pulse width modulation (PWM) New control schemes, such as fuzzy logic control, neural networks, and predictive control, have been proposed due to the improvement of fast and powerful microprocessors. This paper proposes a switching strategy, that is, the vector pre-selection technique to obtain high efficiency [23], and the model predictive current control method based on Electronics 2019, 8, 625; doi:10.3390/electronics8060625 www.mdpi.com/journal/electronics. Method using one vector and smaller current errorstocompared the modelcurrent predictive current control method using during oneduring sampling period. Simulation and experimental the three-phase presented in order to verify the the effectiveness of the proposed method. Are presented in order to verify effectiveness of the proposed method
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