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Power and Voltage Regulation of a Quad Active Bridge.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Power and Voltage Regulation of a Quad Active Bridge./
作者:	Hatatah, Mohammed A.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	138 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-11, Section: B.
Contained By:	Dissertations Abstracts International82-11B.
標題:	Control algorithms. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28390760
ISBN:	9798569959723

Power and Voltage Regulation of a Quad Active Bridge.
Hatatah, Mohammed A.

Power and Voltage Regulation of a Quad Active Bridge. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 138 p.

Source: Dissertations Abstracts International, Volume: 82-11, Section: B.

Thesis (Ph.D.)--University of Pittsburgh, 2021.

This item must not be sold to any third party vendors.

The solid-state transformer (SST) has received substantial attention because of its potential in helping to achieve more intelligent grid systems. The SST is a combination of power electronic (PE) converters and a high-frequency transformer (HFT), thus, reducing volumetric footprint resulting in space savings. The SST provides several functions such as controllable voltage and disturbance isolation. It also provides a dc-link voltage that helps advancements towards complete DC distribution systems.A challenge identified from within the literature is balancing the voltages for each of the ports on the MV side of the QAB. Renewable energy supply to these ports will be stochastic in nature resulting in voltage variations at the output of the MV bridges feeding the transformer. If this is not managed appropriately, unequal power flow will be drawn by each of the ports leading to undesired voltage ripples that impact the DC-link voltage. In addition, the voltage unbalance problem makes it difficult to feed a common load without violating its voltage limits. Therefore, voltage regulation has to be investigated to target this voltage unbalance and maintain constant output voltage.The proposed approach is based upon linear-quadratic regulator (LQR) control for the DC-DC stage of the SST to alleviate the issues mentioned for improved renewable energy regulation for SST applications. Despite the effort reported, nonlinearity and uncertainty are still a challenge in some applications. So, other combined techniques have been investigated to mitigate the phenomena mentioned earlier. This motivates the use of adaptive linear-quadratic regulator (ALQR) and nonlinear model predictive control (NMPC) to track the nonlinear change of the QAB converter due to the renewable energy. Although regulation purpose has been maintained in, stability is still a challenging point in the NMPC design. Thus, a control strategy is proposed to improve the regulation of the SST based QAB considering a practical NMPC scheme with guaranteed stability.

ISBN: 9798569959723Subjects--Topical Terms:

3560702
Control algorithms.
Subjects--Index Terms:

Solid-state transformer

Power and Voltage Regulation of a Quad Active Bridge.
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300 $a 138 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-11, Section: B.
500 $a Advisor: Solomon, Luke;Dallal, Ahmed;Kerestes, Robert;Kwasinski, Alexis;Grainger, Brandon.
502 $a Thesis (Ph.D.)--University of Pittsburgh, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a The solid-state transformer (SST) has received substantial attention because of its potential in helping to achieve more intelligent grid systems. The SST is a combination of power electronic (PE) converters and a high-frequency transformer (HFT), thus, reducing volumetric footprint resulting in space savings. The SST provides several functions such as controllable voltage and disturbance isolation. It also provides a dc-link voltage that helps advancements towards complete DC distribution systems.A challenge identified from within the literature is balancing the voltages for each of the ports on the MV side of the QAB. Renewable energy supply to these ports will be stochastic in nature resulting in voltage variations at the output of the MV bridges feeding the transformer. If this is not managed appropriately, unequal power flow will be drawn by each of the ports leading to undesired voltage ripples that impact the DC-link voltage. In addition, the voltage unbalance problem makes it difficult to feed a common load without violating its voltage limits. Therefore, voltage regulation has to be investigated to target this voltage unbalance and maintain constant output voltage.The proposed approach is based upon linear-quadratic regulator (LQR) control for the DC-DC stage of the SST to alleviate the issues mentioned for improved renewable energy regulation for SST applications. Despite the effort reported, nonlinearity and uncertainty are still a challenge in some applications. So, other combined techniques have been investigated to mitigate the phenomena mentioned earlier. This motivates the use of adaptive linear-quadratic regulator (ALQR) and nonlinear model predictive control (NMPC) to track the nonlinear change of the QAB converter due to the renewable energy. Although regulation purpose has been maintained in, stability is still a challenging point in the NMPC design. Thus, a control strategy is proposed to improve the regulation of the SST based QAB considering a practical NMPC scheme with guaranteed stability.
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650 4 $a Alternative energy. $3 3436775
650 4 $a Electricity distribution. $3 3562889
650 4 $a Electric power. $3 2143306
650 4 $a Controllers. $3 3559217
650 4 $a Variables. $3 3548259
650 4 $a Approximation. $3 3560410
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650 4 $a Energy storage. $3 652130
650 4 $a Literature reviews. $3 3559998
650 4 $a Renewable resources. $3 3559207
650 4 $a Bridges. $3 868720
650 4 $a Efficiency. $3 753744
653 $a Solid-state transformer
653 $a High-frequency transformer
653 $a Voltage unbalance
653 $a Nonlinear model predictive control
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