Novel model predictive direct power control strategy for grid‐connected three‐level inverters

Wang, Xiaodong; Liu, Xin; Mo, Zhaohong; Ji, Wen; Xiong, Zuhong; Xia, Bingyuan; Xie, Changjun; Li, Chenguang; Zhang, Hongjun

doi:10.1049/iet-pel.2020.0038

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…In order to assess the performance of the proposed method more precisely, a comparison of proposed DSMC with some common techniques is performed. For example, model predictive control [36] or adaptive neural network control [37] meth- ods require high calculation time in comparison with proposed DSMC, that led to ripple of switching. Also, the low computational complexity is an important advantage of proposed DSMC.…”

Section: Resultsmentioning

confidence: 99%

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Mohammadhassani

Narm

2021

IET Power Electronics

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Here, a novel control strategy based on sliding mode control for the single‐stage boost inverter is presented. The goal is to achieve a system with robustness against inherent delays and variations in parameters, fast response, and high‐quality AC voltage. Therefore, according to the idea of current‐mode control, a new type of dynamic sliding mode control (DSMC) is proposed to improve the response performance on various input and parameter operation conditions. In comparison with the conventional controllers, the proposed DSMC utilized only a single loop while presenting attractive features such as robustness against parametric uncertainties and input delay by definition new sliding surfaces. Furthermore, the proposed system has a fast and chattering‐free response, provides an appropriate steady‐state error, good total harmonic distortion (THD), while its implementation is very simple. In a fair comparison with conventional sliding mode control, simulations and laboratory experiments verified satisfactory performance and effectiveness of the DSMC method.

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Section: Resultsmentioning

confidence: 99%

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Mohammadhassani

Narm

2021

IET Power Electronics

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“…In recent years, the finite control set-MPC (FCS-MPC) has been widely used and developed in the electrical field. [19][20][21][22][23][24][25][26][27] In Mohapatra and Agarwal, 28 81 different switching states of the three-level four-leg inverter are redefined and placed in the three-dimensional coordinate, forming three cubes nested together. A new MPC optimization-seeking logic algorithm is defined to reduce computational volume, but the principal idea is too complex.…”

Section: Introductionmentioning

confidence: 99%

“…Among the control strategies of inverters, model predictive control (MPC) is more convenient for dealing with nonlinear and multivariate problems. In recent years, the finite control set‐MPC (FCS‐MPC) has been widely used and developed in the electrical field 19–27 . In Mohapatra and Agarwal, 28 81 different switching states of the three‐level four‐leg inverter are redefined and placed in the three‐dimensional coordinate, forming three cubes nested together.…”

Section: Introductionmentioning

confidence: 99%

Model predictive direct power control strategy for leakage current suppression on a grid‐connected three‐level inverter

Gao

Yang

Luo

et al. 2022

Circuit Theory & Apps

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The nonisolated grid‐connected photovoltaic inverter system suffers from the problem of leakage current. Therefore, a leakage current suppression control strategy based on the model predictive direct power control is proposed for the three‐level four‐leg grid‐connected inverter. At first, the system model is established to analyze the factors that affect the leakage current and the potential of the neutral point. Second, the first three legs, inverting part, use model predictive direct power control, and the fourth leg of the inverter is used to maintain a constant common‐mode voltage to achieve the suppression of the leakage current. The fourth leg is indirectly controlled by the switch state of the first three legs; thus, the number of optimization times is reduced. Finally, by simulation, the leakage current is compared and analyzed with the three‐level three‐leg inverter under conditions with different parasitic capacitance values. The results show that the proposed strategy suppresses the leakage current by more than 60% without affecting the neutral point potential and has a fast optimization speed.

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“…Therefore, the control method can highly improve the dynamic performance of the DC output voltage, which does not need an outer voltage control loop. The advantages of this method are the high-power factor, the high efficiency factor, and the ability to be applied in a wide variety of applications [7][8][9]. However, due to the limitations of the current loop, it easily generates harmonic distortion in the input current, thereby reducing the power factor.…”

Section: Introductionmentioning

confidence: 99%

Realization of Low-Voltage and High-Current Rectifier Module Control System Based on Nonlinear Feed-Forward PID Control

Liu

2021

Electronics

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The low-voltage and high-current permanent magnet synchronous generator (PMSG), which has characteristics of high power density, small size, and excellent energy saving, is representative of the generators. As a key module of the integrated DC output system of PMSG, the low-voltage and high-current rectifier module is also a nonlinear time-varying system that is readily influenced by parametric changes and external disturbances. Aiming at the shortcomings of traditional control strategies, this paper proposes a novel low-voltage and high-power rectifier module control strategy based on nonlinear feed-forward PID control. The controller has a wide range of environmental applications because of its greater robustness. At the same time, the introduction of feed-forward control shortens regulation time of the system. Therefore, the combination of the two control methods can improve the dynamic performance of the system without influencing the steady-state performance. The simulation model of an integrated rectifier system based on SVPWM control was constructed by Simulink, which can achieve a rated output of 5 V/300 A. At the same time, the simulation model of the controller is constructed and applied to the rectifier output system of a 5 V/300 A synchronous generator to complete the nonlinear feed-forward PID control. Through the comparison between simulation and experiment, it has been proven that the control method can effectively resist the load disturbances and improve the response speed of the system.

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Novel model predictive direct power control strategy for grid‐connected three‐level inverters

Cited by 9 publications

References 35 publications

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Model predictive direct power control strategy for leakage current suppression on a grid‐connected three‐level inverter

Realization of Low-Voltage and High-Current Rectifier Module Control System Based on Nonlinear Feed-Forward PID Control

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