Design and development of a distributed control scheme for an AC stacked distributed PV inverter architecture

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Trivedi, S. (2015). Design and development of a distributed control scheme for an AC stacked distributed PV inverter architecture. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

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.

Details
Author

Trivedi, Saurabh

Title

Design and development of a distributed control scheme for an AC stacked distributed PV inverter architecture

Physical Description

1 online resource (81 pages) : PDF

Date

2015

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

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.

Genre

masters theses

Subjects--Topics

Electrical engineering

Degree

M.S.

Keywords

AC Stacked
Cascaded
Control
Distributed
Inverter
PV

Subject Area

Electrical Engineering

Advisor(s)

Parkhideh, Babak

Committee Members

Cox, Robert
Nasipuri, Asis

Degree Note

Thesis (M.S.)--University of North Carolina at Charlotte, 2015.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Trivedi_uncc_0694N_10890

Permalink

http://hdl.handle.net/20.500.13093/etd:1229