Multi-port Power Electronic Interface For Renewable Energy Sources

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Multi-port Power Electronic Interface For Renewable Energy Sources

Show simple item record Jiang, Wei en_US 2012-04-11T20:55:13Z 2012-04-11T20:55:13Z 2012-04-11 January 2009 en_US
dc.identifier.other DISS-10500 en_US
dc.description.abstract Energy intensive products and services are penetrating people's daily life as well as different sectors of industry during recent decades. Further effort to improve efficiency, reduce green house gas and hazardous particle emission lead to the emergence of the "more electric" concept in several industries including transportation. This trend, however, burdens the aging power system and existing local power networks. To offer a remedy to the problem and a smooth transition to a more reliable, more diverse, and more efficient power grid of the future, the concept of Multi-port Power Electronic Interface (MPEI) for localized power processing is introduced in this dissertation, which interfaces and manages various sources, loads and storages. Different means of integrating multiple sources and storages into the existing power system are studied and evaluated; the six phase-leg structure is chosen to interface five sources/loads: fuel cell, wind turbine, solar cell, battery and utility grid. Partitioning of source-interface and load-interface on a system level as well as analysis and modeling on small signal level are performed. A novel control structure for source-interface is proposed in the design, which forms Controlled Quasi Current Source (CQCS) during the load sharing operation and offers several salient advantages:1. Inherent average current-mode control.2. Easy share of steady state current/power.3. Share of load dynamics for better source protection.Local control loops for various input ports are designed based on linearized system model; controller performance is tuned to accommodate the characteristics of different sources. To maintain a sustainable operation, different modes of operation are defined for MPEI; detailed state-transition with associated events are also defined in each operation mode. Prototype of MPEI is built and control system is implemented digitally in a digital signal processor; steady state and transient performance of MPEI is tested under variety of meaningful conditions, which proves the feasibility of the proposed design. The concepts, analysis and design of MPEI conducted in this dissertation pave the way for designing of intelligent power electronic infrastructure for future sustainable energy systems. en_US
dc.description.sponsorship Fahimi, Babak en_US
dc.language.iso en en_US
dc.publisher Electrical Engineering en_US
dc.title Multi-port Power Electronic Interface For Renewable Energy Sources en_US
dc.type Ph.D. en_US
dc.contributor.committeeChair Fahimi, Babak en_US Electrical Engineering en_US Electrical Engineering en_US University of Texas at Arlington en_US doctoral en_US Ph.D. en_US

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