TY - GEN
T1 - A new proposal to eliminate the DC current component at the point of common coupling for grid connected systems
AU - Buticchi, G.
AU - Lorenzani, E.
AU - Fratta, A.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Nonlinear loads as grid connected converters can cause, besides the generation of several current harmonics in the grid current, a DC current component injection. A DC current component can cause the magnetic core saturation of distribution power transformers. Transformers operating under saturation conditions present increased power losses, overheating and distorted current waveforms. Since a DC current component causes a small DC voltage component drop across the parasitic resistance of the distribution grid conductors, canceling the DC voltage component at the Point of Common Coupling (PCC) implies the compensation of the DC current injection by electric loads or grid connected converters connected at the same PCC. This paper proposes a low cost solution for an accurate detection, free from offset problems, of the DC voltage component present in the grid voltage. The DC voltage compensation strategy was embedded in a full bridge grid connected converter. Simulation and experimental results showed the effectiveness of the proposed strategy.
AB - Nonlinear loads as grid connected converters can cause, besides the generation of several current harmonics in the grid current, a DC current component injection. A DC current component can cause the magnetic core saturation of distribution power transformers. Transformers operating under saturation conditions present increased power losses, overheating and distorted current waveforms. Since a DC current component causes a small DC voltage component drop across the parasitic resistance of the distribution grid conductors, canceling the DC voltage component at the Point of Common Coupling (PCC) implies the compensation of the DC current injection by electric loads or grid connected converters connected at the same PCC. This paper proposes a low cost solution for an accurate detection, free from offset problems, of the DC voltage component present in the grid voltage. The DC voltage compensation strategy was embedded in a full bridge grid connected converter. Simulation and experimental results showed the effectiveness of the proposed strategy.
UR - http://www.scopus.com/inward/record.url?scp=78751486897&partnerID=8YFLogxK
U2 - 10.1109/IECON.2010.5675334
DO - 10.1109/IECON.2010.5675334
M3 - Conference contribution
AN - SCOPUS:78751486897
SN - 9781424452262
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 3244
EP - 3249
BT - Proceedings - IECON 2010, 36th Annual Conference of the IEEE Industrial Electronics Society
T2 - 36th Annual Conference of the IEEE Industrial Electronics Society, IECON 2010
Y2 - 7 November 2010 through 10 November 2010
ER -