Model predictive control of an indirect matrix converter with active damping capability
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Tarih
2020
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info:eu-repo/semantics/openAccess
Özet
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.
Açıklama
Anahtar Kelimeler
Kaynak
Balkan Journal of Electrical and Computer Engineering
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Cilt
8
Sayı
1