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Power Control and Optimization of Ph...

Ghaffari, Azad.

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Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems./
Author:	Ghaffari, Azad.
Description:	140 p.
Notes:	Source: Dissertation Abstracts International, Volume: 74-11(E), Section: B.
Contained By:	Dissertation Abstracts International74-11B(E).
Subject:	Engineering, General. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3589839
ISBN:	9781303289309

Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems.
Ghaffari, Azad.

Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems. - 140 p.

Source: Dissertation Abstracts International, Volume: 74-11(E), Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2013.

Power map and Maximum Power Point (MPP) of Photovoltaic (PV) and Wind Energy Conversion Systems (WECS) highly depend on system dynamics and environmental parameters, e.g., solar irradiance, temperature, and wind speed. Power optimization algorithms for PV systems and WECS are collectively known as Maximum Power Point Tracking (MPPT) algorithm. Gradient-based Extremum Seeking (ES), as a non-model-based MPPT algorithm, governs the system to its peak point on the steepest descent curve regardless of changes of the system dynamics and variations of the environmental parameters. Since the power map shape defines the gradient vector, then a close estimate of the power map shape is needed to create user assignable transients in the MPPT algorithm. The Hessian gives a precise estimate of the power map in a neighborhood around the MPP. The estimate of the inverse of the Hessian in combination with the estimate of the gradient vector are the key parts to implement the Newton-based ES algorithm. Hence, we generate an estimate of the Hessian using our proposed perturbation matrix. Also, we introduce a dynamic estimator to calculate the inverse of the Hessian which is an essential part of our algorithm. We present various simulations and experiments on the micro-converter PV systems to verify the validity of our proposed algorithm.

ISBN: 9781303289309Subjects--Topical Terms:

1020744
Engineering, General.

Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems.
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020 $a 9781303289309
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100 1 $a Ghaffari, Azad. $3 2096512
245 1 0 $a Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems.
300 $a 140 p.
500 $a Source: Dissertation Abstracts International, Volume: 74-11(E), Section: B.
500 $a Advisers: Miroslav Krstic; Sridhar Seshagiri.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2013.
520 $a Power map and Maximum Power Point (MPP) of Photovoltaic (PV) and Wind Energy Conversion Systems (WECS) highly depend on system dynamics and environmental parameters, e.g., solar irradiance, temperature, and wind speed. Power optimization algorithms for PV systems and WECS are collectively known as Maximum Power Point Tracking (MPPT) algorithm. Gradient-based Extremum Seeking (ES), as a non-model-based MPPT algorithm, governs the system to its peak point on the steepest descent curve regardless of changes of the system dynamics and variations of the environmental parameters. Since the power map shape defines the gradient vector, then a close estimate of the power map shape is needed to create user assignable transients in the MPPT algorithm. The Hessian gives a precise estimate of the power map in a neighborhood around the MPP. The estimate of the inverse of the Hessian in combination with the estimate of the gradient vector are the key parts to implement the Newton-based ES algorithm. Hence, we generate an estimate of the Hessian using our proposed perturbation matrix. Also, we introduce a dynamic estimator to calculate the inverse of the Hessian which is an essential part of our algorithm. We present various simulations and experiments on the micro-converter PV systems to verify the validity of our proposed algorithm.
520 $a The ES scheme can also be used in combination with other control algorithms to achieve desired closed-loop performance. The WECS dynamics is slow which causes even slower response time for the MPPT based on the ES. Hence, we present a control scheme, extended from Field-Oriented Control (FOC), in combination with feedback linearization to reduce the convergence time of the closed-loop system. Furthermore, the nonlinear control prevents magnetic saturation of the stator of the Induction Generator (IG). The proposed control algorithm in combination with the ES guarantees the closed-loop system robustness with respect to high level parameter uncertainty in the IG dynamics. The simulation results verify the effectiveness of the proposed algorithm.
590 $a School code: 0033.
650 4 $a Engineering, General. $3 1020744
650 4 $a Energy. $3 876794
650 4 $a Engineering, Electronics and Electrical. $3 626636
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710 2 $a University of California, San Diego. $b Mechanical and Aerospace Engineering. $3 2096513
773 0 $t Dissertation Abstracts International $g 74-11B(E).
790 $a 0033
791 $a Ph.D.
792 $a 2013
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3589839