A new discrete-time voltage controller based on the internal model principle for three-phase voltage source PWM inverters with /spl Delta/Y output transformer

In this paper a new digital voltage controller based on the internal model principle for three-phase inverters with /spl Delta/ transformer at the output is proposed. A dynamic model of the inverter, transformer, filter and load is derived and a decoupling method is proposed. The proposed digital co...

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Bibliographic Details
Published in2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551) Vol. 4; pp. 2508 - 2514 Vol.4
Main Authors Botteron, F., Pinheiro, H., Hey, H.L., Pinheiro, J.R., Griindling, H.A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2004
Subjects
Circuit faults
Digital control
Finite impulse response filter
Power electronics
Power harmonic filters
Pulse width modulation inverters
Rectifiers
Regulators
Uninterruptible power systems
Voltage control
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Summary:In this paper a new digital voltage controller based on the internal model principle for three-phase inverters with /spl Delta/ transformer at the output is proposed. A dynamic model of the inverter, transformer, filter and load is derived and a decoupling method is proposed. The proposed digital controller is not prone to produce DC components, which that can lead to the output transformer saturation. Additionally, this digital controller result in a simple form and it is well suited for a fixed-point implementation. Experimental results, implemented in 16 bits DSP TMS320F241, validate the theoretical developments and demonstrate the good performance of the proposed controller under both nonlinear balanced and unbalanced loads.
ISBN:0780383990
9780780383999
ISSN:0275-9306
2377-6617
DOI:10.1109/PESC.2004.1355223