TY - GEN
T1 - Cascaded H-bridge multilevel converter topology and three-phase balance control for large scale photovoltaic systems
AU - Rivera, Sebastian
AU - Wu, Bin
AU - Kouro, Samir
AU - Wang, Hong
AU - Zhang, Donglai
PY - 2012
Y1 - 2012
N2 - The increase in the power levels of photovoltaic (PV) energy conversion systems has resulted in new large-scale grid connected configurations that have reached the megawatt level. This substantial increment in the power levels imposes new challenges to the grid interfacing converter, and therefore results in new opportunities to be explored. This work introduces a new medium voltage multilevel scheme based on a three-phase cascaded H-bridge (CHB) converter and multiple PV strings. The proposed configuration enables a large increase of the total power capacity of the PV system, while the introduction of a multilevel converter helps to improve both power quality and efficiency and medium voltage operation at the grid side. The main challenge of the proposed configuration is to handle the inherent power imbalances that occur not only between the different cells of one phase of the converter but also between the three phases. Simulation results of a 7-level CHB PV system are presented to validate the proposed topology and control method.
AB - The increase in the power levels of photovoltaic (PV) energy conversion systems has resulted in new large-scale grid connected configurations that have reached the megawatt level. This substantial increment in the power levels imposes new challenges to the grid interfacing converter, and therefore results in new opportunities to be explored. This work introduces a new medium voltage multilevel scheme based on a three-phase cascaded H-bridge (CHB) converter and multiple PV strings. The proposed configuration enables a large increase of the total power capacity of the PV system, while the introduction of a multilevel converter helps to improve both power quality and efficiency and medium voltage operation at the grid side. The main challenge of the proposed configuration is to handle the inherent power imbalances that occur not only between the different cells of one phase of the converter but also between the three phases. Simulation results of a 7-level CHB PV system are presented to validate the proposed topology and control method.
UR - http://www.scopus.com/inward/record.url?scp=84866929196&partnerID=8YFLogxK
U2 - 10.1109/PEDG.2012.6254077
DO - 10.1109/PEDG.2012.6254077
M3 - Conference contribution
AN - SCOPUS:84866929196
SN - 9781467320238
T3 - Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2012
SP - 690
EP - 697
BT - Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2012
T2 - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2012
Y2 - 25 June 2012 through 28 June 2012
ER -
