In the recent years the research on photovoltaic converters has been focused on topologies that do not feature a line frequency transformer, in order to reduce costs and successfully increase the overall efficiency. The main problem in removing the galvanic isolation is that the parasitic capacitance present between the cell and the metal frame enclosing the panel (usually earth-connected) enables a common-mode current to be injected into the grid by the converter. This paper proposes an active common-mode filter able to compensate the high-frequency common-mode voltage variations at the output of the power converters, that represent the principal cause of ground leakage current. The advantage of this solution concerns the capability to operate with an arbitrary power factor. In this work it is applied in cascade to a converter with standard full-bridge topology driven by a three-level PWM strategy. Simulation and experimental results shows the feasibility of the proposed approach.

Active Common-Mode Filter for Photovoltaic Transformerless Inverters / Buticchi, G.; Barater, D.; Lorenzani, Emilio; Salati, Andrea. - ELETTRONICO. - (2012), pp. 5702-5707. (Intervento presentato al convegno 38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012 tenutosi a Montreal, QC, can nel 25-28 October 2012) [10.1109/IECON.2012.6389053].

Active Common-Mode Filter for Photovoltaic Transformerless Inverters

D. Barater;LORENZANI, EMILIO;SALATI, Andrea
2012

Abstract

In the recent years the research on photovoltaic converters has been focused on topologies that do not feature a line frequency transformer, in order to reduce costs and successfully increase the overall efficiency. The main problem in removing the galvanic isolation is that the parasitic capacitance present between the cell and the metal frame enclosing the panel (usually earth-connected) enables a common-mode current to be injected into the grid by the converter. This paper proposes an active common-mode filter able to compensate the high-frequency common-mode voltage variations at the output of the power converters, that represent the principal cause of ground leakage current. The advantage of this solution concerns the capability to operate with an arbitrary power factor. In this work it is applied in cascade to a converter with standard full-bridge topology driven by a three-level PWM strategy. Simulation and experimental results shows the feasibility of the proposed approach.
2012
38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012
Montreal, QC, can
25-28 October 2012
5702
5707
Buticchi, G.; Barater, D.; Lorenzani, Emilio; Salati, Andrea
Active Common-Mode Filter for Photovoltaic Transformerless Inverters / Buticchi, G.; Barater, D.; Lorenzani, Emilio; Salati, Andrea. - ELETTRONICO. - (2012), pp. 5702-5707. (Intervento presentato al convegno 38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012 tenutosi a Montreal, QC, can nel 25-28 October 2012) [10.1109/IECON.2012.6389053].
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/839091
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 6
social impact