Balkan Journal of Electrical and Computer Engineering

2147-284X 2147-284X

MUSA YILMAZ

10.17694/bajece.614528

Electrical Engineering

Elektrik Mühendisliği

Model Predictive Control of an Indirect Matrix Converter with Active Damping Capability

https://orcid.org/0000-0001-5589-2278

Gökdağ

Mustafa

KARABÜK ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ

https://orcid.org/0000-0001-9517-3630

Gülbudak

Ozan

KARABÜK ÜNİVERSİTESİ

01 31 2020

8 1 31 39 09 03 2019 11 15 2019

2013

Balkan Journal of Electrical and Computer Engineering

Inthis paper, a model predictive control (MPC) scheme is proposed to controlindirect matrix converter (IMC), which is used for three phase-to-three phasedirect power conversion. IMC is composed of back-to-back connected conventionalcurrent source rectifier (CSR) and voltage source inverter (VSI) without anyintermediate energy storage component between them. The aim in the control ofCSR side is generally to have unity power factor with relatively low totalharmonic distortion (THD) and the aim in the control of VSI side is to be ableto synthesize sinusoidal load currents with desired peak value and frequency.Imposed source current MPC technique in abc frame is used for the rectifierside and cost function evaluation process calculates three-phase supply currenterrors respect to its reference. Supply currents for next sampling interval arepredicted using the discrete form of input filter model. The peak value ofsinusoidal supply current reference is generated from the error in load currentspace vector using a PI compensator. This generated reference is synchronizedwith supply voltage by the multiplication of Proportional-Integral (PI)compensator output value and instantaneous three-phase supply voltage. Anactive damping technique, which does not require to select an optimum value forfictitious damping resistor, is also included in the proposed control scheme inorder to mitigate the resonance phenomenon of lightly damped input LC filter tosuppress the higher order harmonics in supply currents. Load currents withdesired peak and frequency are also obtained by imposing sinusoidal currents inabc frame. The cost function for VSI stage evaluates outputload current error.Load current predictions are obtained by using the discrete form of load model.These two cost functions are combined into a single cost function without anyweighting factor since botherror terms are in the same nature. The switching state that minimizes thispre-defined cost function among the 24-valid switching combinations of IMC isselected and applied to converter. The proposed model predictive control withactive damping method shows good performance in terms of THD levels in supplycurrents even at low current demands from supply side. The proposed model predictive control methodcombined with active damping strategy guarantees unity power factor operationand draws sinusoidal load currents at desired peak and frequency.

Indirect matrix converter ac-ac power conversion model predictive control active damping

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