Abstract

Three-phase active rectifiers guarantee sinusoidal input currents and unity power factor at the price of a high switching frequency ripple. To adopt an LCL-filter, instead of an -filter, allows using reduced values for the inductances and so preserving dynamics. However, stability problems can arise in the current control loop if the present resonance is not properly damped. Passive damping simply adds resistors in series with the LCL-filtercapacitors.Thissimplicityisattheexpenseofincreased losses and encumbrances. Active damping modifies the control algorithm to attain stability without using dissipative elements but,sometimes,needingadditionalsensors.Thissolutionhasbeen addressed in many publications. The lead-lag network method is one of the first reported procedures and continues being in use. However, neither there is a direct tuning procedure (without trial anderror)noritsrationalehasbeenexplained.Thus,inthispaper a straightforward procedure is developed to tune the lead-lag network with the help of software tools. The rationale of this procedure,basedonthecapacitorcurrentfeedback,iselucidated. Stability is studied by means of the root locus analysis in -plane. Selecting the lead-lag network for the maximum damping in the closed-loop poles uses a simple optimization algorithm. The robustness against the grid inductance variation is also analyzed. Simulations and experiments confirm the validity of the proposed design flow.

Autore Pugliese

• Liserre Marco

Tutti gli autori

• Pena-Alzola Rafael , Liserre M , Blaabjerg Frede , Sebastian Rafael , Dannehl Jorg , Fuchs Friedrich Wilhelm

Titolo volume/Rivista

IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS

Anno di pubblicazione

2014

ISSN

1551-3203

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

74

Ultimo Aggiornamento Citazioni

2017-04-23 03:20:56

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile