A Low-Cost Phase-Angle Compensation Method for the Indirect Matrix Converters Operating at the Unity Grid Power Factor

Gong, Zheng; Zhang, Haijun; Dai, Peng; Sun, Ning; Li, Ming

doi:10.1109/tpel.2019.2893705

Cited by 14 publications

(6 citation statements)

References 31 publications

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“…In literature, it has been widely acknowledged that the input filter capacitors consume reactive power which degrades the power factor. A lot of methods have been proposed to achieve unity power factor operation, such as those in [28], [32], and [33]. Nevertheless, few papers have considered the effect of the filter capacitors on the instantaneous active power under input disturbances.…”

Section: Calculation Of Reference Source Active Power a Effect mentioning

confidence: 99%

Improved Reference Generation of Active and Reactive Power for Matrix Converter With Model Predictive Control Under Input Disturbances

et al. 2019

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The existing model predictive control schemes for the matrix converter perform well under ideal input conditions, but are not optimal when source voltages are unbalanced and distorted. The analysis shows that, under input disturbances, the input filter capacitors cause active power fluctuation and further output power quality degradation, which has been ignored in literature. Therefore, a method is proposed to extract the fluctuation with a digital filter and compensate it in the reference generation of source active power, so as to eliminate the output low-frequency harmonics. In the case of input voltage unbalance, a method is proposed to generate the reference source reactive power which could achieve sinusoidal source currents, without the need of separating sequence components. Moreover, effects of source voltage distortions, which degrade the input power quality significantly and are ignored in literature, are suppressed with the proposed generation method of reference reactive power. The extensive experimental results in nine cases have verified the satisfactory steady-state and dynamic performance of the proposed methods. INDEX TERMS Model predictive control, matrix converter, source voltage disturbances, current distortions.

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Section: Calculation Of Reference Source Active Power a Effect mentioning

confidence: 99%

Improved Reference Generation of Active and Reactive Power for Matrix Converter With Model Predictive Control Under Input Disturbances

et al. 2019

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“…MC is a frequently used topology in industry because of its structure and application flexibility, such as combining with a high frequency link (HFL) or wireless power transmission (WPT) system to converting alternative currents with arbitrary frequency, amplitude and phase because of the flexible bi-directional switches on arms [1][2][3][4]. Unipolar or bipolar phase-shift control strategies are the basic methods for MC topologies to realize soft switches and to utilize parasitic parameters [5,6].…”

Section: Introductionmentioning

confidence: 99%

A Random Switching Frequency De-Re- Coupling Current MPC Method for Single-Phase MC

Sun¹,

Wei²

2021

dteees

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Model predictive control (MPC) is a highlighted control method for power electronic realm. For Matrix Converter (MC) with bidirectional switches and difficulty model, MPC has a complex structure and control process. A random switching frequency de-re-coupling current MPC method is proposed in this paper for a single-phase MC. A voltage function is obtained by the simplified and decoupled discrete-time model of MC, and a random switching frequency generating strategy is inserted to modulate function and to improve harmonic of MPC variable switching frequency. The principle effectiveness and advantages of the proposed method such as THD, settling times and static errors are verified by simulation results comparing with the conventional MPC and de-recoupling fixed switching frequency current MPC methods.

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“…According to the idea above, some contributions regarding the input power factor angle (IPFA) compensation strategies [18]- [23] are reported to regulate the GPF for the IMC. Generally, they can be divided into two typical types shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…However, the voltage PLL, the synchronous rotation transformations and the decoupled closed-loop control structure are essential to these strategies, which also bring in high complexities. In addition, a low-cost phase-angle compensation method based on the least mean square (LMS) algorithm is proposed to reduce the costs in [23], and the satisfied compensation performance can be obtained. However, the complicated determination of the searching step size may affect the stability and convergence speed of the steepest descent method in the LMS algorithm.…”

Section: Introductionmentioning

confidence: 99%

A QPR-Based Low-Complexity Input Current Control Strategy for the Indirect Matrix Converters With Unity Grid Power Factor

et al. 2019

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Unity grid power factor (GPF) is essential for the indirect matrix converter (IMC) applications to satisfy the grid-friendly requirement. The existing unity GPF control strategies usually consist of highcomplexity structures, resulting in difficult parameter adjustments and high-speed processor requirements. In this paper, a low-complexity input current control (LCICC) strategy is proposed for the IMC operating at the unity GPF. Unlike the conventional strategies designed in the d-q synchronous coordinate frame, the proposed LCICC strategy is set up in the α-β stationary coordinate frame. Then, the quasi-proportional resonant (QPR) controllers are utilized for a novel input current control manner, which is implemented to regulate the input currents based on the reconstructed grid voltage and current vectors. By this design, the proposed strategy can help to reduce the control complexity, with the advantages of the conventional closed-loop control strategies reserved. The steady-state and dynamic-state performance of the proposed strategy is validated by the experiments on a downscaled prototype. Besides, comparative experimental research with respect to an existing typical strategy indicates that the computational burden can be reduced 14.9% by the proposed strategy.INDEX TERMS Indirect matrix converter, grid power factor, quasi proportional resonant, control complexity reduction.

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A Low-Cost Phase-Angle Compensation Method for the Indirect Matrix Converters Operating at the Unity Grid Power Factor

Cited by 14 publications

References 31 publications

Improved Reference Generation of Active and Reactive Power for Matrix Converter With Model Predictive Control Under Input Disturbances

Improved Reference Generation of Active and Reactive Power for Matrix Converter With Model Predictive Control Under Input Disturbances

A Random Switching Frequency De-Re- Coupling Current MPC Method for Single-Phase MC

A QPR-Based Low-Complexity Input Current Control Strategy for the Indirect Matrix Converters With Unity Grid Power Factor

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