Design and development of a distributed control scheme for an AC stacked distributed PV inverter architecture
1 online resource (81 pages) : PDF
University of North Carolina at Charlotte
The increasing importance of renewable electricity, especially PV generation, and the reducing costs of PV modules has placed the inverter in limelight. Panel-level inverter configurations like Micro-inverter are gaining commercial importance, but hold a minor market share. On the other hand, PV inverters which are connected in series on the AC side, like cascaded multilevel inverter or cascaded H-bridge (CHB), are gaining research importance. Another such configuration called Inverter Molecule (IM), which is at its nascent stage seems to be very promising as a panel-level inverter configuration.The control structures employed for the distributed panel-level inverters in cascade such as CHB, are either centralized or hybrid. A control structure which is truly distributed, taking advantage of the inverter configuration/architecture, has not yet been developed. The hypothesis here is that, individual inverters of a string can be controlled independently of each other, without any communication because the common string current inherently shares the information with all members.Hence, a novel distributed control scheme has been designed and developed and its feasibility for the IM architecture is proved in this thesis, by mathematical modeling and analysis, and simulation results.
Cox, RobertNasipuri, Asis
Thesis (M.S.)--University of North Carolina at Charlotte, 2015.
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