A Predictive Current Control Technique for Three-Level NPC Voltage Source Inverters

Perantzakis, G.S.; Xepapas, F.H.; Papathanassiou, Stavros A.; Manias, S.N.

doi:10.1109/pesc.2005.1581788

Cited by 17 publications

(9 citation statements)

References 13 publications

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“…The term n sw was added into the cost function which makes the difference of the proposed controller from the conventional MPC-based controller. The average switching frequency, f sw , per switching device was determined by Equation 20using the total number of switching transitions, n sw , over the sampling time duration T s [52].…”

Section: Control Algorithmmentioning

confidence: 99%

Power Loss Analysis of Solar Photovoltaic Integrated Model Predictive Control Based On-Grid Inverter

et al. 2020

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This paper presents a finite control-set model predictive control (FCS-MPC) based technique to reduce the switching loss and frequency of the on-grid PV inverter by incorporating a switching frequency term in the cost function of the model predictive control (MPC). In the proposed MPC, the control objectives (current and switching frequency) select an optimal switching state for the inverter by minimizing a predefined cost function. The two control objectives are combined with a weighting factor. A trade-off between the switching frequency (average) and total harmonic distortion (THD) of the current was utilized to determine the value of the weighting factor. The switching, conduction, and harmonic losses were determined at the selected value of the weighting factor for both the proposed and conventional FCS-MPC and compared. The system was simulated in MATLAB/Simulink, and a small-scale hardware prototype was built to realize the system and verify the proposal. Considering only 0.25% more current THD, the switching frequency and loss per phase were reduced by 20.62% and 19.78%, respectively. The instantaneous overall power loss was also reduced by 2% due to the addition of a switching frequency term in the cost function which ensures a satisfactory empirical result for an on-grid PV inverter.

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Section: Control Algorithmmentioning

confidence: 99%

Power Loss Analysis of Solar Photovoltaic Integrated Model Predictive Control Based On-Grid Inverter

et al. 2020

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“…Several sampling strategies in [17]- [19] can be employed for the PCC based on linear prediction technique. However, time-delay compensation by a linear predictor is only valid when the system dynamic characteristic is significantly slower than the delay time [23].…”

Section: B Sampling Strategy For Pccmentioning

confidence: 99%

Predictive Current Controller for Single-Phase Grid-Connected VSIs With Compensation for Time-Delay Effect and System Uncertainty

Cao

Chang

Shao

2018

IEEE J. Emerg. Sel. Topics Power Electron.

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In the last decade, predictive current control (PCC) has been widely implemented for grid-connected voltage source inverters (VSIs) due to the advantages of low-current harmonic injection, fast dynamic response, and easy implementation for digital control systems. However, with the increasing switching frequency of VSIs applied to pursue a better output quality, inevitable time delays and uncertain system disturbances are aggravating system performance and stability, which presents a serious challenge for the PCC design. Thus, a new PCC algorithm has been proposed in this paper for a single-phase VSI to improve the quality of the current fed to the grid, as well as enhance the system stability and robustness. The proposed control scheme is developed from the traditional predictive current controller along with a simple weighted filter predictor and a robust adaptive voltage compensator. The results of simulation and experiment investigation have demonstrated the improvements of the proposed control scheme in inverter output quality and robustness to parameter variations.

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“…In [7], authors use trajectory based predictive control for current control of three-level diode-clamped NPC inverter. This control technique has been adapted to the proposed 15-level cascade H-bridge inverter.…”

Section: Predictive Current Controllermentioning

confidence: 99%

“…However, the future value of the reference current i * (k + 1) is unknown. In order to determine the next value of the reference current, in [7] they use Lagrange quadratic extrapolation which uses Lagrange polynomials that are polynomials of the least degree that at each point assume the corresponding value of the function.…”

Section: Predictive Current Controllermentioning

confidence: 99%

Predictive Current Control of Grid-tied Cascade H-bridge Inverter

Pastor

Dudrik

2013

Automatika

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Original scientific paperThis paper presents a grid-tied cascade H-bridge inverter with predictive current control technique. The proposed 15-level cascade inverter consists of three H-bridge inverters with separated DC sources. At the output of the cascade inverter an L filter is used as a grid filter. The cascade inverter is controlled by the mean of RT-Lab. The predictive current regulator and one-phase synchronous reference frame PLL are designed with help of Rapid Control Prototyping. The proposed control method uses a discrete model of the system to predict behavior of the system for each of 15 voltage levels of inverter output voltage. Verification by simulation and on a laboratory model is described.Key words: Cascade inverter, Predictive current control, RT-Lab, Synchronous frame PLL Strujno prediktivno upravljanje mrežnim H-mosnim izmjenjivačem. U ovom radu prikazan je kaskadni mrežni izmjenjivač u H-mostu sa strujnim prediktivnim upravljanjem. Predloženi 15-razinski kaskadni izmjenjivač sadrži tri H-mosna izmjenjivača s odvojenim DC izvorima. Na izlazu kaskadnog izmjenjivača dodan je induktivni mrežni filter. Kaskadni izmjenjivač upravlja se korištenjem RT-Lab programskog okruženja. Strujni prediktivni regulator i jednofazni PLL poravnat sa sinkronim koordinatnim sustavom dizajnirani su uz pomoć Rapid Control Prototyping metode. Predložena metoda upravljanja koristi diskretni model sustava za predikciju ponašanja sustava u svakom od 15 naponskih razina izlaznog napona izmjenjivača. Upravljanje je provjereno na simulacijskom modelu sustava i laboratorijskom postavu.Ključne riječi: kaskadni izmjenjivač, strujno prediktivno upravljanje, RT-Lab, PLL u sinkronom koordinatnom sustavu

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A Predictive Current Control Technique for Three-Level NPC Voltage Source Inverters

Cited by 17 publications

References 13 publications

Power Loss Analysis of Solar Photovoltaic Integrated Model Predictive Control Based On-Grid Inverter

Power Loss Analysis of Solar Photovoltaic Integrated Model Predictive Control Based On-Grid Inverter

Predictive Current Controller for Single-Phase Grid-Connected VSIs With Compensation for Time-Delay Effect and System Uncertainty

Predictive Current Control of Grid-tied Cascade H-bridge Inverter

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