Predictive control with imposed sinusoidal source and load currents of an indirect matrix converter operating at fixed switching frequency and without weighting factors
11 May 2015-pp 641-647
TL;DR: In this paper, a predictive control technique for an indirect matrix converter is proposed, which allows to impose a sinusoidal waveform in both the input and output current of the converter without any weighting factor in the controller and, at the same time, the operation at fixed switching frequency.
Abstract: In this paper a predictive control technique for an indirect matrix converter is proposed. The control strategy allows to impose a sinusoidal waveform in both the input and output current of the converter without any weighting factor in the controller and, at the same time, the operation at fixed switching frequency. Simulation results validate the proposal under both steady and transient states which are also compared with the predictive current control strategy with minimization of the reactive input power.
Citations
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TL;DR: A novel controller based on the predictive technique has been introduced for a neutral-point-clamped grid-tied inverter with its ability of injecting a very low total harmonic distortion to the grid with almost unity power factor during normal and transient operations.
Abstract: In this paper, a novel controller based on the predictive technique has been introduced for a neutral-point-clamped grid-tied inverter. The aim of the developed method is to achieve a constant system switching frequency operation. The proposed method generates the voltage vector by nullifying the derivative of the cost function of a finite-set model predictive controller. The developed controller takes in action of injecting the desired grid current while a closed-loop space vector modulator regulates the capacitors voltages. A comparative study with a similar model predictive algorithm with constant switching frequency (MPC-CSF) is introduced and discussed in terms of computational complexity. Experimental results are provided to verify the performance and robustness of the new method over MPC-CSF with its ability of injecting a very low total harmonic distortion to the grid with almost unity power factor during normal and transient operations.
43 citations
Cites background from "Predictive control with imposed sin..."
...As a way to solve this drawback, many attempts were published in the last few years [12]–[21]....
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TL;DR: A comprehensive review of HVDC interconnections, asynchronous AC interConnections, synchronous AC Interconnections and different types of power flow controllers used in these interconnection technologies is presented.
Abstract: Energy security is one of the most crucial factor in the development of any nation. Interconnections among different power system networks are made to lower the overall price of power generation as well as enhance the reliability and the security of electric power supply. Different types of interconnection technologies are employed, such as AC interconnections, DC interconnections, synchronous interconnections, and asynchronous interconnections. It is necessary to control the power flow between the interconnected electric power networks. The power flow controllers are used to (i) enhance the operational flexibility and controllability of the electric power system networks, (ii) improve the system stability and (iii) accomplish better utilization of existing power transmission systems. These controllers can be built using power electronic devices, electromechanical devices or the hybrid of these devices. In this paper, control techniques for power system networks are discussed. It includes both centralized and decentralized control techniques for power system networks. This paper also presents a comprehensive review of HVDC interconnections, asynchronous AC interconnections, synchronous AC interconnections and different types of power flow controllers used in these interconnections. Moreover, some important and multivariable flexible AC transmission system (FACTS) devices such as UPFC and IPFC are also discussed with their merits and limitations. Finally, a new asynchronous AC link called flexible asynchronous AC link (FASAL) system is also described in detail. At last, a summary of the comparative analysis of power system link and power flow controllers is given based on recent publications. More than 400 research articles and papers on the topic of power transfer control are covered in this review and appended for a quick reference.
43 citations
TL;DR: This work provides a comprehensive study and detailed classification of several predictive control methods and techniques, discussing special capabilities they each add to the operation and control scheme for different matrix converter topologies.
Abstract: Matrix converters are a well-known class of direct AC-AC power converter topologies that can be used in applications, where compact volume and low weight are necessary. For good performance, special attention should be paid to the control scheme used for these converters. The model predictive control strategy is a promising, straightforward and flexible choice for controlling various different matrix converter topologies. This work provides a comprehensive study and detailed classification of several predictive control methods and techniques, discussing special capabilities they each add to the operation and control scheme for different matrix converter topologies. This study also considers the issues regarding the implementation of model predictive control strategies for matrix converters. This survey and comparison are intended to be a useful guide for solving the related drawbacks of each topology and to enable the application of this control scheme for matrix converters in practical applications.
43 citations
01 Oct 2016
TL;DR: A new control scheme based on a Finite Set-Model Predictive Control (FS-MPC) and aims of a fixed switching frequency operation that allows of obtaining a voltage vector that is responsible of nullifying the cost function's derivative for its optimization.
Abstract: this paper introduces a new control scheme based on a Finite Set-Model Predictive Control (FS-MPC) and aims of a fixed switching frequency operation. The proposed scheme allows of obtaining a voltage vector that is responsible of nullifying the cost function's derivative for its optimization. Moreover, a closed-loop space vector modulation (SVM) based on the proposed predictive control scheme is introduced for a three-level grid connected inverter. The proposed algorithm that injects a desired current to the grid is investigated through external perturbations such as change in the line current amplitude as well as DC voltage variation. Discrete-time system model was developed and simulated. Simulation results on MATLAB/Simulink are provided to verify the fast dynamic performance, and good voltage balancing of DC bus capacitors of the NPC inverter.
17 citations
Cites background or methods from "Predictive control with imposed sin..."
...Other methods were introduced based on the switching behavior of the PWM modulator with a switching frequency divided into smaller steps [14-16], or on duty cycle generation based on a suitable modulation scheme in the cost function minimization [11-13]....
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...In literature several papers where published trying to resolve this drawback [8-16]....
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19 Oct 2017
TL;DR: In this article, two indirect model predictive control strategies are proposed in order to reduce the computational cost and by doing so avoid the use of weighting factors for the direct matrix converter.
Abstract: The following paper presents a novel indirect model predictive control strategy for a direct matrix converter (DMC). The direct matrix converter has a large number of available switching states and therefore the implementation of predictive control techniques require high computational resources. In addition, the simultaneous selection of weighting factors for the control of input and output variables of the converter complicates the system tuning. In this paper, two indirect model predictive control strategies are proposed in order to reduce the computational cost and by doing so avoid the use of weighting factors. The proposal is enhanced with a fixed switching frequency strategy in order to improve the performance of the full system. Results confirm the feasibility of the proposal by demonstrating that it is an alternative to classical predictive control strategies for the direct matrix converter.
16 citations
Cites background from "Predictive control with imposed sin..."
...By considering the guidelines presented in [10] for the current and voltage predictions, it is possible to define the cost function gr associated to the minimization of the instantaneous reactive power at the input: gr = (vsα(k + 1)isβ(k + 1)− vsβ(k + 1)isα(k + 1))(2) (9) For the second strategy, the cost function gr is associated to the input control in the α-β plane which is defined as: gr = (i ∗ sα − isα(k + 1))(2) + (isβ − isβ(k + 1))(2) (10) To define the source current reference of the DMC, please refer to [11]....
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References
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TL;DR: The state-of-the-art view in the development of this matrix converter is presented, starting with a brief historical review and an important part of the paper is dedicated to a discussion of the most important modulation and control strategies developed recently.
Abstract: The matrix converter is an array of controlled semiconductor switches that connects directly the three-phase source to the three-phase load. This converter has several attractive features that have been investigated in the last two decades. In the last few years, an increase in research work has been observed, bringing this topology closer to the industrial application. This paper presents the state-of-the-art view in the development of this converter, starting with a brief historical review. An important part of the paper is dedicated to a discussion of the most important modulation and control strategies developed recently. Special attention is given to present modern methods developed to solve the commutation problem. Some new arrays of power bidirectional switches integrated in a single module are also presented. Finally, this paper includes some practical issues related to the practical application of this technology, like overvoltage protection, use of filters and ride-through capability.
1,879 citations
"Predictive control with imposed sin..." refers background in this paper
...In comparison with the conventional back to back converter, the matrix converter (MC) features several advantages mainly due to the advantage of handling higher power densities and to operate in environments with harsh temperatures and pressures [1], [2]....
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TL;DR: It is concluded that the control strategy has a significant impact on the resonance of the MC input filter.
Abstract: This paper presents a review of the most popular control and modulation strategies studied for matrix converters (MCs) in the last decade. The purpose of most of these methods is to generate sinusoidal current on the input and output sides. These methods are compared considering theoretical complexity and performance. This paper concludes that the control strategy has a significant impact on the resonance of the MC input filter.
556 citations
"Predictive control with imposed sin..." refers background in this paper
...This converter features sinusoidal input and output currents, bidirectional energy flow and controllable input displacement power factor [2], [3]....
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TL;DR: This paper presents first an overview of the well-known voltage and current dc-link converter topologies used to implement a three-phase PWM ac-ac converter system, and a common knowledge basis of the individual converterTopologies is established.
Abstract: This paper presents first an overview of the well-known voltage and current dc-link converter topologies used to implement a three-phase PWM ac-ac converter system. Starting from the voltage source inverter and the current source rectifier, the basics of space vector modulation are summarized. Based on that, the topology of the indirect matrix converter (IMC) and its modulation are gradually developed from a voltage dc-link back-to-back converter by omitting the dc-link capacitor. In the next step, the topology of the conventional (direct) matrix converter (CMC) is introduced, and the relationship between the IMC and the CMCs is discussed in a figurative manner by investigating the switching states. Subsequently, three-phase ac-ac buck-type chopper circuits are considered as a special case of matrix converters (MCs), and a summary of extended MC topologies is provided, including three-level and hybrid MCs. Therewith, a common knowledge basis of the individual converter topologies is established.
489 citations
"Predictive control with imposed sin..." refers background in this paper
...Such as indicated in [4], it is possible to define each available vector for the rectifier and inverter side of the IMC (Table I and Table II) in the α-β plane....
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...The indirect matrix converter (IMC) is another ac-ac converter which not only holds the same features of the conventional direct matrix converter (DMC) but also is easier to control and allows secure commutation [4]....
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TL;DR: The proposed reduced OSS-DPC algorithm belongs to the predictive-D PC family and provides the desired power references by calculating globally OSSs and has the potential to provide high performance during both transient and steady states.
Abstract: Grid-connected power converters play a key role in several applications such as the integration of renewable energy sources and motor drives. For this reason, the development of high performance control strategies for this particular class of power converters has increasingly attracted the interest of both academic and industry researchers. This paper presents the predictive optimal switching sequence (OSS) direct power control (DPC) (OSS-DPC) algorithm for grid-connected converters. The OSS-DPC method belongs to the predictive-DPC family and provides the desired power references by calculating globally OSSs. To address computational and implementation issues, an efficient control algorithm, named reduced OSS-DPC, is introduced. The implementation of the proposed control strategy in a standard DSP is evaluated on a two-level power converter prototype working as a STATCOM. Experimental results show the algorithm's potential to provide high performance during both transient and steady states.
329 citations
"Predictive control with imposed sin..." refers background in this paper
...3, is adopted with the goal of applying the optimal vectors in both the rectifier and inverter stages [34]....
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TL;DR: This paper presents a review of the current state of the art in terms of practical matrix converter technologies and reports on the reported use of the matrix converters in different applications.
Abstract: This paper presents a review of the current state of the art in terms of practical matrix converter technologies. Present solutions to the numerous technological issues and challenges faced when implementing viable matrix converters are discussed. The reported use of the matrix converters in different applications is also presented together with a review of current industrial applications.
295 citations
"Predictive control with imposed sin..." refers background in this paper
...This converter features sinusoidal input and output currents, bidirectional energy flow and controllable input displacement power factor [2], [3]....
[...]
...In comparison with the conventional back to back converter, the matrix converter (MC) features several advantages mainly due to the advantage of handling higher power densities and to operate in environments with harsh temperatures and pressures [1], [2]....
[...]