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

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5 Author(s)
Botteron, F. ; Power Electron. & Control Res. Group, Santa Maria Federal Univ., Brazil ; Pinheiro, H. ; Hey, H.L. ; Pinheiro, J.R.
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In this paper a new digital voltage controller based on the internal model principle for three-phase inverters with Δ 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.

Published in:

Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual  (Volume:4 )

Date of Conference:

2004

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