NDLI: Cascaded H-bridge multilevel converter topology and three-phase balance control for large scale photovoltaic systems

Content Provider	IEEE Xplore Digital Library
Author	Rivera, S. Bin Wu Kouro, S. Hong Wang Donglai Zhang
Copyright Year	2012
Description	Author affiliation: Shenzhen Academy of Aerospace Technology, Shenzhen City, Guangdong, Province of China, China (Hong Wang; Donglai Zhang) \|\| Department of Electrical and Computer Engineering, Ryerson University, Toronto, Ontario, Canada (Rivera, S.; Bin Wu) \|\| Departamento de Electrónica, Universidad Técnica, Federico Santa María, Valparaíso, Chile (Kouro, S.)
Abstract	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.
Starting Page	690
Ending Page	697
File Size	1480366
Page Count	8
File Format	PDF
ISBN	9781467320214
e-ISBN	9781467320238
e-ISBN	9781467320221
DOI	10.1109/PEDG.2012.6254077
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-25
Publisher Place	Denmark
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Medium voltage Energy conversion Inverters Topology Distributed power generation Voltage control
Content Type	Text
Resource Type	Article

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