Advanced Control Methods of DC/AC and AC/DC Power Converters—Look-Up Table and Predictive Algorithms

Godlewska, Agata; Grodzki, R.; Falkowski, Piotr; Korzeniewski, M.; Kulikowski, K.; Sikorski, Andrzej

doi:10.1007/978-3-319-45735-2_10

Cited by 16 publications

(10 citation statements)

References 84 publications

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“…In transient states the selected voltage vectors decrease both components of the error vector by the use of the converter voltage vector that corresponding to the longest current vector derivatives in x axis [8]. That enables fast response to dynamic changes of currents.…”

Section: Pci-3l Methods Is Variation Of Fcs-mpc Methodssupporting

confidence: 42%

“…One of the solutions to meet those requirements is using multi-level converters [5][6][7]. Three-level NPC converters, due to their relatively low costs, simple structure and uncomplicated DC link voltage balancing methods [8], [9], appear to be the most commonly used [10]. Three-level converters offer great advantages as compared with typical two-level converters.…”

Section: Introductionsupporting

confidence: 38%

“…6) to avoid additional weighting factors in the cost functions J, a separate algorithm is used to balance voltages of DC link capacitors [8]. P. Falkowski, K. Kulikowski, and R. Grodzki ditions the converter was supplied by the California Instruments MX30-3Pi.…”

Section: Pci-3l Methods Is Variation Of Fcs-mpc Methodsmentioning

confidence: 40%

“…The ε ixy vector, expressed in the rotating xy reference frame, is defined as follows: ε ixy = ε ix + jε iy (4) Error vector changes are determined by the vector opposite to the grid current derivative vector d ixxx . Taking the above into account, we can calculate the error vector in the next sampling period as follows [8,15]:…”

Section: Control Methodsmentioning

confidence: 99%

“…2 (2) where: i xy -grid current vector in xy rotating reference frame, L -grid reactor inductance, e xy -grid voltage vector, u xy -threelevel converter voltage vector, ω g -grid voltage pulsation. From (3) it is possible to obtain both the vector proportional to the derivative vectors of the grid current and the derivative of the grid current vector [8]:…”

Section: Mathematical Model Of 3-level Ac-dc Converter Connected To Tmentioning

confidence: 99%

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Predictive and look-up table control methods of a three-level AC-DC converter under distorted grid voltage

Falkowski¹,

Kulikowski²,

Grodzki³

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Power electronic three-level AC-DC converters connecting a utility grid with DC supplies are widely used in renewable energy sources. For such distributed systems, the quality of energy is very important. Hence, control algorithms of an AC-DC converter have to provide not only a sinusoidal shape of grid current, but also stable operation during transient states in the grid, e.g. voltage dips or voltage unbalance. This paper deals with the problem of robustness of AC-DC control methods under disturbed grid voltage. Three modern predictive control algorithms are presented and investigated under grid voltage distortions. Experimental results from a laboratory test setup illustrating properties of the described methods are shown. Conventional linear control methods, such as VOC and DPC-SVM, are designed to control only the fundamental component of current. In order to fulfill GCRs and achieve robustness under grid voltage distortion, these linear methods need additional compensation algorithms that, in turn, increase their complexity [16]. There are many publications concerning improvements of the classical control methods in order to ensure proper converter operation under grid voltage distortions [17][18][19]. However, there are only few that relate to non-linear or predictive control methods of AC-DC converters under grid voltage distortion [20,21]. This paper presents three modern non-linear control algorithms. The first one, direct power control three levels three areas (DPC-3L-3A) [13], is an extended version of the look-up table DPC with new optimal error plane distribution as well as with transfer of the error vector into a new coordinate system. Selection of the converter voltage vector is based on the error vector angle, which makes it possible to eliminate the inconvenience of using comparators. The second method presented here, called predictive control of current of three-level converter (PCi-3L) [22], belongs to the group of finite control set model predictive control methods (FCS-MPC). In the PCi-3L strategy the switches are controlled directly without modulation. This is performed by online minimizing of specific cost function J. Depending on the definition cost function, we can control many different variables, e.g. current, dc-link voltage, switching frequency, etc. Cost function is calculated for all converter voltage vectors. Minimum value of J determines the optimal switching combinations.

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Section: Pci-3l Methods Is Variation Of Fcs-mpc Methodssupporting

confidence: 42%

Section: Introductionsupporting

confidence: 38%

Section: Pci-3l Methods Is Variation Of Fcs-mpc Methodsmentioning

confidence: 40%

Section: Control Methodsmentioning

confidence: 99%

Section: Mathematical Model Of 3-level Ac-dc Converter Connected To Tmentioning

confidence: 99%

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Predictive and look-up table control methods of a three-level AC-DC converter under distorted grid voltage

Falkowski¹,

Kulikowski²,

Grodzki³

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Robust direct power control with simple on‐line evaluation for distributed generation

Zabihi

Asadi

2021

Int Trans Electr Energ Syst

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Summary This article presents a direct power control (DPC) method to cover entire power limit area (PLA) of grid‐connected converter for Distributed Generation (DG) application. By using of the Lyapunov theory, an online decision‐making process is designed in which the optimum switching state of converter is determined only based on interactions between grid/converter voltages and power errors. The proposed method neither needs small sampling time nor system's parameters. In this paper, two major tracking indexes are evaluated throughout PLA: apparent power error and average switching frequency. This evaluations lead to a better analysis of the controllers' behavior across the entire operation range (ie, PLA). Effects of different sampling times and parameter mismatch are depicted in the results, which indicate optimum and reliable performances of the proposed method.

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Comparative Evaluation of Actuating Motors for Traction Electric Drive of Transport Robots

Voronin

Sogrin

Shaburov

et al. 2018

2018 Global Smart Industry Conference (GloSIC)

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Advanced Control Methods of DC/AC and AC/DC Power Converters—Look-Up Table and Predictive Algorithms

Cited by 16 publications

References 84 publications

Predictive and look-up table control methods of a three-level AC-DC converter under distorted grid voltage

Predictive and look-up table control methods of a three-level AC-DC converter under distorted grid voltage

Robust direct power control with simple on‐line evaluation for distributed generation

Comparative Evaluation of Actuating Motors for Traction Electric Drive of Transport Robots

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