An Enhanced Control Strategy for AC–DC Matrix Converters Under Unbalanced Grid Voltage

An Overmodulation Strategy for Matrix Converter Under Unbalanced Input Voltages

“…Although sinusoidal and balanced output voltages are achieved by the aforementioned methods, the input current distortion is not suppressed effectively. Therefore, further studies have been carried out to improve the quality of the input current waveforms [10]- [23]. References [10]- [16] introduced three different modulation strategies to enhance the performance of input currents based on the construction of the reference input current vector.…”

“…The analytical solutions to input currents derived in [14] show that method I has the best current quality which is sinusoidal. Alternatively, in [17]- [23], the input current distortion is suppressed by the reactive power control based on the mathematical model of the input filter and converter, while the balanced output voltages are achieved by the output current control or constant output power control. However, in the previously mentioned researches, the maximum attainable output voltages are reduced due to the variation in magnitude of the input voltage vector caused by the negative sequence components.…”

“…Meanwhile, in order to evaluate the performance of the proposed strategy, the harmonic characteristics of the input currents and output voltages are quantitatively analyzed by deploying the double Fourier integral transform method [24], [25]. The main contribution of this paper is summarized as follows: i) Compared with the conventional control method for the MC under unbalanced input voltage conditions in [10]- [23], an indirect SVPWM strategy is proposed to increase the maximum output voltage of the MC. The trajectories of the reference output voltage and reference input current vector in the proposed method are extended gradually based on the linear superimposition principle.…”

Reduction of DC Current Ripples by Virtual Space Vector Modulation for Three-Phase AC–DC Matrix Converters

“…Basically, it is a single-stage bidirectional current source AC-DC converter, which rectifies the sinusoidal AC signals to the pure DC signals. Different modulation strategies have been applied for the AC-DC MCs, such as the Alesina-Venturini [5], the pulse-width modulation (PWM) [10,11], the model predictive control (MPC) [12][13][14], and the space vector modulation (SVM) [15][16][17][18][19][20][21]. Predictive control strategies for the AC-DC MCs under unbalanced grid voltage were proposed in [12] and [13].…”

Predictive Control Method Based on Adjacent Vector Confinement Technique for a Three-Phase AC-DC Matrix Converter with High Efficiency

“…The MPC algorithm has been successfully applied to the AC-DC MCs in the literature [20][21][22]. Model predictive control strategies under unbalanced grid voltages have been studied [20,21]. Literature [22] investigates a unity-input-power-factor scheme for the AC-DC MCs.…”