REDUCCIÓN DE CORRIENTE DE FUGA EN INVERSOR TRIFASICO PARA APLICACIONES FOTOVOLTAICAS (DECREASE OF THE LEAKAGE CURRENT ON THREE-PHASE INVERTER FOR PHOTOVOLTAIC APPLICATIONS)
Resumen
Resumen
Hoy en día, el estudio sobre los inversores sin transformador conectados a la red se ha incrementado, los principales aspectos considerados son el patrón de conmutación, la topología, los filtros y también el controlador. Ciertamente, uno de los principales aspectos es eliminar o reducir la corriente de fuga generada por la capacitancia parásita inherente a un sistema fotovoltaico. Este artículo se centra en la reducción de la corriente de fuga de un inversor trifásico sin transformador cambiando de forma sencilla la conexión del filtro de salida. Los resultados de simulación validan la propuesta.
Palabra(s) Clave: Capacitor parásito, corriente de fuga, sin transformador, inversor trifásico.
Abstract
Nowadays, the study about grid connected transformerless inverters has been increased, the main aspects considered are the switching pattern, the topology, the filters, and also the controller. Certainly, the main concern is to eliminate or to reduce the leakage current generated in the parasitic capacitance inherent in a photovoltaic system and, therefore, achieve safety requirements. This paper focuses on a leakage current reduction of a three-phase transformerless inverter by simple changing the connection of the output filter. Simulation results validate the proposal.
Keywords: Leakage current, photovoltaic system (PV), parasitic capacitance, transformerless, three-phase full-bridge.
Texto completo:
90-100 PDFReferencias
E. Gubia, P. Sanchis, A. Ursua, J. Lopez, and L. Marroyo, "Ground currents in single-phase transformerless photovoltaic systems," Progress in photovoltaics: research and applications, vol. 15, no. 7, nov. 2007, pp. 629-650.
W. Chen, X. Yang, W. Zhang, and X. Song, "Leakage current calculation for PV inverter system based on a parasitic capacitor model," IEEE Trans. on Power Electron., vol. 31, no. 12, Dec. 2016, pp. 8205-8217.
DKE Deutsche Kommission Elektrotechnik, "Automatic Disconnection Device between a Generator and the Public Low-Voltage Grid," Std. DIN VDE 0126, 2006.
T. Kerekes, R. Teodorescu, M. Liserre, C. Klumpner, and M. Sumner, "Evaluation of three-phase transformerless photovoltaic inverter topologies," IEEE Trans. on Power Electron., vol. 24, no. 9, Sept. 2009, pp. 2202-2211.
A. Hintz, U.R. Prasanna, and K. Rajashekara, "Comparative study of the three-phase grid-connected inverter sharing unbalanced three-phase and/or single-phase systems," IEEE Trans. on Ind. Appl., vol. 52, no. 6, Nov. 2016, pp. 5156-5164.
H. Li, Y. Huang, and J. Lu, "Reactive power compensation and DC link voltage control using Fuzzy-PI on grid-connected PV system with d-STATCOM," In IEEE Power and Energy Engineering Conference (APPEEC), 2016 IEEE PES Asia-Pacific, Oct. 2016, pp. 1240-1244.
T.K.S. Freddy, N.A. Rahim, W.P. Hew, and H.S. Che, "Modulation techniques to reduce leakage current in three-phase transformerless H7 photovoltaic inverter," IEEE Trans. on Ind. Electron., vol. 62, no. 1, Jan. 2015, pp. 322-331.
V. Erginer and M.H. Sarul, "A novel reduced leakage current modulation technique for Z-source inverter used in photovoltaic systems." IET Power Electron., vol 7, no. 3, March 2013, pp. 496-502.
C.C. Hou, C.C. Shih, P.T. Cheng, and A.M. Hava, "Common-mode voltage reduction pulsewidth modulation techniques for three-phase grid-connected converters," IEEE trans. on Power Electron., vol. 28, no. 4, April 2013, pp. 1971-1979.
M.C. Cavalcanti, K.C. De Oliveira, A.M. De Farias, F.A. Neves, G.M. Azevedo, and F.C. Camboim, "Modulation techniques to eliminate leakage currents in transformerless three-phase photovoltaic systems," IEEE Trans. on Ind. Electron., vol. 57, no. 4, April 2010, pp. 1360-1368.
X. Guo, R. He, J. Jian, Z. Lu, X. Sun, and J.M. Guerrero, "Leakage current elimination of four-leg inverter for transformerless three-phase PV systems," IEEE Trans. on Power Electron., vol. 31, no. 3, March 2016, pp. 1841-1846.
M.C. Cavalcanti, A.M. Farias, K.C. Oliveira, F.A. Neves, and J.L. Afonso, "Eliminating leakage currents in neutral point clamped inverters for photovoltaic systems," IEEE Trans. on Ind. Electron., vol. 59, no. 1, Jan. 2012, pp. 435-443.
O. Lopez, F.D. Freijedo, A.G. Yepes, P. Fernandez-Comesana, J. Malvar, R. Teodorescu, and J. Doval-Gandoy, "Eliminating ground current in a transformerless photovoltaic application," IEEE Trans. on Energy Conversion, vol. 25, no. 1, March 2010, pp. 140-147.
J.C. Giacomini, L. Michels, H. Pinheiro, and C. Rech, "Active damping of a modified LCL filter applied to transformerless grid-connected PV inverter," IEEE Power Electron. Conf. and 1st Southern Power Electron. Conf. (COBEP/SPEC), 2015, Nov. 2015, pp. 1-6
J.C. Giacomini, L. Michels, H. Pinheiro, and C. Rech, "Active damping scheme for leakage current reduction in transformerless three-phase grid-connected pv inverters," IEEE Trans. on Power Electron., vol. 33, no. 5, March 2018, pp. 3988-3999.
URL de la licencia: https://creativecommons.org/licenses/by/3.0/deed.es
Pistas Educativas está bajo la Licencia Creative Commons Atribución 3.0 No portada. 
TECNOLÓGICO NACIONAL DE MÉXICO / INSTITUTO TECNOLÓGICO DE CELAYA
Antonio García Cubas Pte #600 esq. Av. Tecnológico, Celaya, Gto. México
Tel. 461 61 17575 Ext 5450 y 5146
pistaseducativas@itcelaya.edu.mx