Predictive Control of an Indirect Matrix Converter

2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE), 2014

This paper presents and compares two strategies to generate sinusoidal output voltage waveforms and unitary displacement power factor on the input side using predictive control with an indirect matrix converter. These objectives are accomplished using two different predictive control schemes on the input side: minimization of instantaneous reactive power and imposed input sinusoidal currents. Predictive control calculates the future values of the variables to be controlled in order to choose the switching state that produces the minimum error between the variables and their references. Both methods have been tested and compared in simulation, obtaining sinusoidal output voltage and achieving unitary input displacement factor, with a THD of less than 2% for both the input currents and the output voltages.

IET Power Electronics, 2014

The experimental implementation and performance analysis of control techniques applied to an indirect matrix converter are presented here, to improve the input current behaviour under resonances and harmonics distortions. The control strategies are based on model predictive control, which uses the commutation state of the converter in the subsequent sampling time, according to an optimisation algorithm given by a simple cost function and the discrete system model. Experimental results with a laboratory prototype are provided in order to validate the different control schemes, and the effects of a distorted source voltage and filter resonance are analysed.

2009

This paper presents the implementation of a predictive control scheme for an indirect matrix converter. The control scheme selects the switching state that minimizes the reactive power and the error in the output currents according to their reference values. This is accomplished by using a prediction horizon of one sample time and a very intuitive control law. Experimental results with a 6.8-kVA indirect matrix converter prototype are provided in order to validate the proposed control scheme. The converter uses standard digital signal processor operating at a sampling frequency of 20 μs. It is shown that the idea of controlling this converter topology with a predictive approach can be implemented simply and input currents with unity power factor and a total harmonic distortion lower than 5% can be obtained.

Energies, 2021

A continuous control set model predictive power control strategy for an indirect matrix converter is proposed in this paper. The load reactive power, the load active power, and the input reactive power are controlled simultaneously. This control strategy can obtain output waveforms with fixed switching frequency. Additionally, an optimal switching sequence is proposed to simplify the commutations of the indirect matrix converter. To suppress the input filter resonance, an active damping method is proposed. Experimental results prove that the proposed method features controllable input reactive power, controllable load active and reactive power, fixed switching frequency output waveforms, zero-current switching operations, and effectively suppresses input filter resonance.

2017 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2017

The direct matrix converter (DMC) has a large number of available switching states, wherewith, the implementation of predictive control techniques requires 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 also to 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 Index Terms-current control, matrix converters, predictive control, finite control set model predictive control, fictitious dclink.

IEEE Transactions on Industrial Electronics, 2017

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IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017

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2017 IEEE URUCON, 2017

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Balkan Journal of Electrical and Computer Engineering, 2020

In this paper, a model predictive control (MPC) scheme is proposed to control indirect matrix converter (IMC), which is used for three phase-to-three phase direct power conversion without any intermediate energy storage component between them. The aim in the control of current source rectifier (CSR) stage of IMC is generally to have unity power factor with relatively low total harmonic distortion (THD). The aim in the control of voltage source inverter (VSI) stage is to be able to synthesize sinusoidal load currents with desired peak value and frequency. Imposed source current MPC technique in abc frame is used for the rectifier stage. An active damping technique without requiring the selection of an appropriate value for fictitious damping resistor is also included in the proposed control scheme in order to mitigate the resonance phenomenon of lightly damped input LC filter to suppress the higher order harmonics in supply currents. Load currents with desired peak and frequency are also obtained by imposing sinusoidal currents in abc frame. Two different cost functions are combined into a single cost function without any weighting factor since both error terms are in the same nature. The switching state that minimizes this pre-defined cost function among the 24-valid switching combinations of IMC is selected and applied to converter. The proposed model predictive control with active damping method shows a good performance in terms of THD levels in supply currents even at low current demands from supply side. The proposed strategy guarantees unity power factor operation and draws sinusoidal load currents at desired peak and frequency. Index Terms-Indirect matrix converter, ac-ac power conversion, model predictive control, active damping.

IEEE Transactions on Power Electronics, 2000

In this paper, the experimental validation of a predictive current control strategy for a four-leg indirect matrix converter is presented. The four-leg indirect matrix converter can supply energy to an unbalanced three-phase load while providing a path for the zero sequence load. The predictive current control technique is based on the optimal selection among the valid switching states of the converter by evaluating a cost function, resulting in a simple approach without the necessity for modulators. Furthermore, zero dc-link current commutation is achieved by synchronizing the state changes in the input stage with the application of a zero-voltage space vector in the inverter stage. Simulation results are presented and the strategy is experimentally validated using a laboratory prototype.