DocumentCode :
264111
Title :
Comparative evaluation of L and LCL filters in transformerless grid tied converters for active power injection
Author :
Sosa, J.M. ; Escobar, G. ; Martinez-Rodriguez, P.R. ; Vazquez, G. ; Juarez, M.A. ; Diosdado, M.
Author_Institution :
Lab. de Electr. y Electron. de Potencia, ITESI, Irapuato, Mexico
fYear :
2014
fDate :
5-7 Nov. 2014
Firstpage :
1
Lastpage :
6
Abstract :
This paper presents a comparison between two different passive filters for power converters tied to the grid with the application of active power injection. It addresses the L (inductive) filter and the LCL (inductive-capacitive-inductive) filter in single-phase power converters for which are presented the parameter design and modeling. These filters provide coupling of the power converter to the electrical grid and mitigation of high frequency harmonics which are inherent to switching power converters. It is obtained the state-space model and the transfer function of both type of filters and some design considerations for active power injection are presented. An evaluation, by means of numerical simulations, is presented for a single-phase H-bridge inverter with unipolar pulse width modulation for active power injection.
Keywords :
LC circuits; PWM invertors; bridge circuits; numerical analysis; passive filters; power conversion harmonics; power grids; power harmonic filters; state-space methods; switching convertors; transfer functions; LCL filters; active power injection; electrical grid; high frequency harmonics; inductive-capacitive-inductive filter; numerical simulations; passive filters; single-phase H-bridge inverter; single-phase power converters; state-space model; switching power converters; transfer function; transformerless grid tied converters; unipolar pulse width modulation; Active filters; Capacitors; Couplings; Harmonic analysis; Inductors; Power harmonic filters; Switching frequency; L filter; LCL filter; active power injection; transformerless grid tied converter;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power, Electronics and Computing (ROPEC), 2014 IEEE International Autumn Meeting on
Conference_Location :
Ixtapa
Type :
conf
DOI :
10.1109/ROPEC.2014.7036284
Filename :
7036284
Link To Document :
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