Deadbeat Control Based on Current Predictive Calibration for Grid-Connected Converter Under Unbalanced Grid Voltage

Jiang, Weidong; Ma, Weicheng; Wang, Jinping; Wang, Lei; Gao, Yong

doi:10.1109/tie.2017.2674620

Cited by 45 publications

(24 citation statements)

References 23 publications

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“…At the same time, the current observer is used to predict the next beat current in [10,21,22], and the current reference is predicted in advance to compensate for the delay. In [10,21], the current predictive algorithm based on repetitive control observer is proposed, which solves the problem of the current instability caused by the control delay and improves the current predictive precision.…”

Section: Journal Of Electrical and Computer Engineeringmentioning

confidence: 99%

“…In [10,21], the current predictive algorithm based on repetitive control observer is proposed, which solves the problem of the current instability caused by the control delay and improves the current predictive precision. However, this method does not involve the dynamic analysis.…”

Section: Journal Of Electrical and Computer Engineeringmentioning

confidence: 99%

“…The deadbeat current control is based on the mathematical model of the grid-connected inverter and depends on the actual electrical parameters of the main circuit. Theoretically, no static-state error can be achieved in [9][10][11][12]. Because of its fast current transient response, accurate current tracking characteristic, and all digital control, the deadbeat current control has been applied more often.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Double Update PWM Method to Improve Robustness for the Deadbeat Current Controller in Three-Phase Grid-Connected System

Yang

Chen

Luo

et al. 2018

Journal of Electrical and Computer Engineering

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In the grid-connected inverter based on the deadbeat current control, the filter inductance variation and single update PWM affect the distortion of the grid current, stability, and dynamic of the system. For this, a double update PWM method for the deadbeat current controller in three-phase grid-connected system is proposed, which not only effectively decreases the grid current distortion and control delay, but also improves the system stability and dynamic response speed due to reducing the characteristic root equation order of the closed-loop transfer function. The influence of the filter inductance deviation coefficient on the system performance is analyzed. As a conclusion, the corresponding filter inductance deviation coefficient in the system critical stability increases with increase in the parasitic resistance of the filter inductance and line equivalent resistance and decreases with increase in the sampling frequency. Considering the system stability and dynamic response, the optimal range of the control parameters is acquired. Simulation and experimental results verify the effectiveness of the proposed method.

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Section: Journal Of Electrical and Computer Engineeringmentioning

confidence: 99%

Section: Journal Of Electrical and Computer Engineeringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Double Update PWM Method to Improve Robustness for the Deadbeat Current Controller in Three-Phase Grid-Connected System

Yang

Chen

Luo

et al. 2018

Journal of Electrical and Computer Engineering

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“…The 2 direction further separate into many different strategies proposed on the basis of instantaneous power theory. Within those different control strategies presented in other studies, the balanced current control has always attracted special attention. In Ma et al, the control strategy for the elimination of the negative sequence current is explained using well‐known instantaneous power theory, while the cross‐coupling between positive and negative sequence has not been discussed.…”

Section: Introductionmentioning

confidence: 99%

Grid-connected converter control during unbalanced grid conditions based on delay signal cancellation

Popadić

Dumnić

Miličević

et al. 2018

Int Trans Electr Energ Syst

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Summary Considering the recent trend in energy sector transformation towards high share of renewable energy sources, it has become very hard to imagine modern power system without the integration of power electronic devices. A grid‐connected converter will be on the forefront of future energy trading, while simultaneously striving to offer good dynamic behaviour and operation in full accordance with the relevant grid requirements. The control algorithm of the grid‐connected converter has to be capable of achieving the stable steady state operation even during the most severe faults in the system. More importantly, the power quality of the injected currents (and thus the power) needs to be kept at the maximum possible level. This paper presents the control strategy for the grid‐connected converter that offers the possibility of symmetrical grid current injection at the point of common coupling even during unbalanced grid conditions. Proposed control strategy uses delay signal cancellation in the negative sequence synchronous rotating reference frame for the mitigation of the respective current components. The negative influence of asymmetrical grid voltages, present at the point of common coupling as a result of unbalanced grid loads or faults, will be shown within the paper. The key features of the improved control method are outlined, with a special reference to basic theoretical background. The proposed method is experimentally verified using sophisticated research and development station for control of grid‐connected converter.

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“…This method greatly reduces the content of harmonic power, improves the steady-state performance and keeps the dynamic performance unchanged. In document [5], a deadbeat control scheme based on current prediction correction is proposed, which effectively reduces the adverse effects of random sampling error. At the same time, the robust performance of the system is improved.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Deadbeat Control for PV Converter

Zhang¹,

Zeng²,

Zhang³

et al. 2018

Proceedings of the 2017 2nd International Conference on Electrical, Control and Automation Engineering (ECAE 2017)

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Abstract-In this paper, the deadbeat control of singlephase photovoltaic(PV) grid connected converter is studied, and the mathematical model of the control model is derived. The application of a large number of power electronic equipment will be reduced, considering the direct power supply of the DC load by the distributed power supply. In this paper, distributed generation is used as photovoltaic power generation system. It adopts maximum power point tracking control(MPPT), and sends part of power directly to DC load. The surplus power is transported to the grid, which not only ensures the maximum efficiency of energy, but also reduces the cost. In addition, this paper gives the real time calculation formula of inductance, and realizes the more precise control of the system by calculating the inductance on line. Finally, the system has been simulated and verified with Simulink.

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Deadbeat Control Based on Current Predictive Calibration for Grid-Connected Converter Under Unbalanced Grid Voltage

Cited by 45 publications

References 23 publications

A Double Update PWM Method to Improve Robustness for the Deadbeat Current Controller in Three-Phase Grid-Connected System

A Double Update PWM Method to Improve Robustness for the Deadbeat Current Controller in Three-Phase Grid-Connected System

Grid-connected converter control during unbalanced grid conditions based on delay signal cancellation

Improvement of Deadbeat Control for PV Converter

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