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Decentralized Power Management in Microgrids

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Date Issued:
2014
Abstract/Description:
A large number of power sources, operational in a microgrid, optimum power sharing andaccordingly controlling the power sources along with scheduling loads are the biggest challenges in modern power system. In the era of smart grid, the solution is certainly not simple paralleling. Hence it is required to develop a control scheme that delivers the overall power requirements while also adhering to the power limitations of each source. As the penetration of distributed generators increase and are diversified, the choice of decentralized control becomes preferable. In this work, a decentralized control framework is conceived. The primary approach is taken where a small hybrid system is investigated and decentralized control schemes were developed and subsequently tested in a hardware in the loop in conjunction with the hybrid power system setup developed at the laboratory. The control design approach is based on the energy conservation principle. However, considering the vastness ofthe real power network and its complexity of operation along with the growing demand ofsmarter grid operations, called for a revamp in the control framework design. Hence, in thelater phase of this work, a novel framework is developed based on the coupled dynamicalsystem theory, where each control node corresponds to one distributed generator connectedto the microgrid. The coupling topology and coupling strengths of individual nodes aredesigned to be adjustable. The layer is modeled as a set of coupled differential equationsof pre-assigned order. The control scheme adjusts the coupling weights so that steady stateconstraints are met at the system level, while allowing flexibility to explore the solutionspace. Additionally, the approach guarantees stable equilibria during power redistribution.The theoretical development is verified using simulations in matlab simulink environment.
Title: Decentralized Power Management in Microgrids.
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Name(s): Bhattacharjee, Amit, Author
Das, Tuhin, Committee Chair
Simaan, Marwan, Committee Member
Kassab, Alain, Committee Member
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2014
Publisher: University of Central Florida
Language(s): English
Abstract/Description: A large number of power sources, operational in a microgrid, optimum power sharing andaccordingly controlling the power sources along with scheduling loads are the biggest challenges in modern power system. In the era of smart grid, the solution is certainly not simple paralleling. Hence it is required to develop a control scheme that delivers the overall power requirements while also adhering to the power limitations of each source. As the penetration of distributed generators increase and are diversified, the choice of decentralized control becomes preferable. In this work, a decentralized control framework is conceived. The primary approach is taken where a small hybrid system is investigated and decentralized control schemes were developed and subsequently tested in a hardware in the loop in conjunction with the hybrid power system setup developed at the laboratory. The control design approach is based on the energy conservation principle. However, considering the vastness ofthe real power network and its complexity of operation along with the growing demand ofsmarter grid operations, called for a revamp in the control framework design. Hence, in thelater phase of this work, a novel framework is developed based on the coupled dynamicalsystem theory, where each control node corresponds to one distributed generator connectedto the microgrid. The coupling topology and coupling strengths of individual nodes aredesigned to be adjustable. The layer is modeled as a set of coupled differential equationsof pre-assigned order. The control scheme adjusts the coupling weights so that steady stateconstraints are met at the system level, while allowing flexibility to explore the solutionspace. Additionally, the approach guarantees stable equilibria during power redistribution.The theoretical development is verified using simulations in matlab simulink environment.
Identifier: CFE0005465 (IID), ucf:50386 (fedora)
Note(s): 2014-12-01
M.S.M.E.
Engineering and Computer Science, Mechanical and Aerospace Engineering
Masters
This record was generated from author submitted information.
Subject(s): decentralized control -- microgrid -- coupled system
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFE0005465
Restrictions on Access: public 2014-12-15
Host Institution: UCF

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