No Cover Image

E-Thesis 370 views 180 downloads

Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems / Cagfer Yanarates

Swansea University Author: Cagfer Yanarates

  • Yanarates_Cagfer_PhD_Thesis_Final_Redacted_Signature.pdf

    PDF | E-Thesis – open access

    Copyright: The author, Cagfer Yanarates, 2022. Released under the terms of a Creative Commons Attribution-Only (CC-BY) License. Third party content is excluded for use under the license terms.

    Download (5.41MB)

DOI (Published version): 10.23889/SUthesis.61504

Abstract

The aim of this thesis is to scrutinize and develop four state-of-the-art power electronics converter control techniques utilized in various photovoltaic (PV) power conversion schemes accounting for maximum power extraction and efficiency. First, Cascade Proportional and Integral (PI) Controller-Bas...

Full description

Published: Swansea 2022
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Zhou, Zhongfu ; Egwebe, Augustine
URI: https://cronfa.swan.ac.uk/Record/cronfa61504
Tags: Add Tag
No Tags, Be the first to tag this record!
first_indexed 2022-10-10T14:19:04Z
last_indexed 2023-01-13T19:22:17Z
id cronfa61504
recordtype RisThesis
fullrecord <?xml version="1.0"?><rfc1807><datestamp>2022-10-10T15:32:49.8204056</datestamp><bib-version>v2</bib-version><id>61504</id><entry>2022-10-10</entry><title>Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems</title><swanseaauthors><author><sid>95ba73ee6da5f81f21523b1b59b184bb</sid><firstname>Cagfer</firstname><surname>Yanarates</surname><name>Cagfer Yanarates</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2022-10-10</date><deptcode>FGSEN</deptcode><abstract>The aim of this thesis is to scrutinize and develop four state-of-the-art power electronics converter control techniques utilized in various photovoltaic (PV) power conversion schemes accounting for maximum power extraction and efficiency. First, Cascade Proportional and Integral (PI) Controller-Based Robust Model Reference Adaptive Control (MRAC) of a DC-DC boost converter has been designed and investigated. Non-minimum phase behaviour of the boost converter due to right half plane zero constitutes a challenge and its non-linear dynamics complicate the control process while operating in continuous conduction mode (CCM). The proposed control scheme efficiently resolved complications and challenges by using features of cascade PI control loop in combination with properties of MRAC. The accuracy of the proposed control system&#x2019;s ability to track the desired signals and regulate the plant process variables in the most beneficial and optimised way without delay and overshoot is verified. The experimental results and analysis reveal that the proposed control strategy enhanced the tracking speed two times with considerably improved disturbance rejection. Second, (P)roportional Gain (R)esonant and Gain Scheduled (P)roportional (PR-P) Controller has been designed and investigated. The aim of this controller is to create a variable perturbation size real-time adaptive perturb and observe (P&amp;O) maximum power point tracking (MPPT) algorithm. The proposed control scheme resolved the drawbacks of conventional P&amp;O MPPT method associated with the use of constant perturbation size that leads to a poor transient response and high continuous steady-state oscillations. The prime objective of using the PR-P controller is to utilize inherited properties of the signal produced by the controller&#x2019;s resonant path and integrate it to update best estimated perturbation that represents the working principle of extremum seeking control (ESC) to use in a P&amp;O algorithm that characterizes the overall system learning-based real time adaptive (RTA). Additionally, utilization of internal dynamics of the PR-P controller overcome the challenges namely, complexity, computational burden, implantation cost and slow tracking performance in association with commonly used soft computing intelligent systems and adaptive control strategies. The experimental results and analysis reveal that the proposed control strategy enhanced the tracking speed five times with reduced steady-state oscillations around maximum power point (MPP) and more than 99% energy extracting efficiency.Third, the interleaved buck converter based photovoltaic (PV) emulator current control has been investigated. A proportional-resonant-proportional (PR-P) controller is designed to resolve the drawbacks of conventional PI controllers in terms of phase management which means balancing currents evenly between active phases to avoid thermally stressing and provide optimal ripple cancellation in the presence of parameter uncertainties. The proposed controller shows superior performance in terms of 10 times faster-converging transient response, zero steady-state error with significant reduction in current ripple. Equal load sharing that constitutes the primary concern in multi-phase converters has been achieved with the proposed controller. Implementing of robust control theory involving comprehensive time and frequency domain analysis reveals 13% improvement in the robust stability margin and 12-degree bigger phase toleration with the PR-P controller. Fourth, a symmetrical pole placement Method-based Unity Proportional Gain Resonant and Gain Scheduled Proportional (PR-P) Controller has been designed and investigated. The proposed PR-P controller resolved the issues associated with the use of the PI controller which are tracking repeating control input signal with zero steady-state and mitigating the 3rd order harmonic component injected into the grid for single-phase PV systems. Additionally, the PR-P controller has overcome the drawbacks of frequency detuning in the grid and increase in the magnitude of odd number harmonics in the system that constitute the common concerns in the implementation of conventional PR controller. Moreover, the unprecedented design process based on changing notch filter dynamics with symmetrical pole placement around resonant frequency overcomes the limitations that are essentially complexity and dependency on the precisely modelled system. The verification and validation process of the proposed control schemes has been conducted using MATLAB/Simulink and implementing MATLAB/Simulink/State flow on dSPACE Real-time-interface (RTI) 1007 processor, DS2004 High-Speed A/D and CP4002 Timing and Digital I/O boards.</abstract><type>E-Thesis</type><journal/><volume/><journalNumber/><paginationStart/><paginationEnd/><publisher/><placeOfPublication>Swansea</placeOfPublication><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic/><keywords>PV systems, MPPT algorithms, control systems, mitigation of the harmonic components, grid connected PV systems, cascade PI controller, model reference adaptive controller, extremum seeking control, Proportional resonant controller mathematical modelling of the converters, state-space averaging technique, time and frequency domain analysis of the derived transfer functions</keywords><publishedDay>27</publishedDay><publishedMonth>9</publishedMonth><publishedYear>2022</publishedYear><publishedDate>2022-09-27</publishedDate><doi>10.23889/SUthesis.61504</doi><url/><notes>Full title of thesis: Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems:Cascade PI Controller-Based Model Reference Adaptive Control, Notch Filter Dynamics-based PR-P Controller Designed by Symmetrical Pole Placement Method, Extremum Seeking Adaptive Control</notes><college>COLLEGE NANME</college><department>Science and Engineering - Faculty</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>FGSEN</DepartmentCode><institution>Swansea University</institution><supervisor>Zhou, Zhongfu ; Egwebe, Augustine</supervisor><degreelevel>Doctoral</degreelevel><degreename>Ph.D</degreename><degreesponsorsfunders>Turkish Government</degreesponsorsfunders><apcterm/><funders/><projectreference/><lastEdited>2022-10-10T15:32:49.8204056</lastEdited><Created>2022-10-10T15:15:33.4247249</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Engineering and Applied Sciences - Uncategorised</level></path><authors><author><firstname>Cagfer</firstname><surname>Yanarates</surname><order>1</order></author></authors><documents><document><filename>61504__25388__832f4311043a40f1bbb6421f6059689a.pdf</filename><originalFilename>Yanarates_Cagfer_PhD_Thesis_Final_Redacted_Signature.pdf</originalFilename><uploaded>2022-10-10T15:32:13.9248836</uploaded><type>Output</type><contentLength>5674126</contentLength><contentType>application/pdf</contentType><version>E-Thesis &#x2013; open access</version><cronfaStatus>true</cronfaStatus><documentNotes>Copyright: The author, Cagfer Yanarates, 2022. Released under the terms of a Creative Commons Attribution-Only (CC-BY) License. Third party content is excluded for use under the license terms.</documentNotes><copyrightCorrect>true</copyrightCorrect><language>eng</language><licence>https://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807>
spelling 2022-10-10T15:32:49.8204056 v2 61504 2022-10-10 Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems 95ba73ee6da5f81f21523b1b59b184bb Cagfer Yanarates Cagfer Yanarates true false 2022-10-10 FGSEN The aim of this thesis is to scrutinize and develop four state-of-the-art power electronics converter control techniques utilized in various photovoltaic (PV) power conversion schemes accounting for maximum power extraction and efficiency. First, Cascade Proportional and Integral (PI) Controller-Based Robust Model Reference Adaptive Control (MRAC) of a DC-DC boost converter has been designed and investigated. Non-minimum phase behaviour of the boost converter due to right half plane zero constitutes a challenge and its non-linear dynamics complicate the control process while operating in continuous conduction mode (CCM). The proposed control scheme efficiently resolved complications and challenges by using features of cascade PI control loop in combination with properties of MRAC. The accuracy of the proposed control system’s ability to track the desired signals and regulate the plant process variables in the most beneficial and optimised way without delay and overshoot is verified. The experimental results and analysis reveal that the proposed control strategy enhanced the tracking speed two times with considerably improved disturbance rejection. Second, (P)roportional Gain (R)esonant and Gain Scheduled (P)roportional (PR-P) Controller has been designed and investigated. The aim of this controller is to create a variable perturbation size real-time adaptive perturb and observe (P&O) maximum power point tracking (MPPT) algorithm. The proposed control scheme resolved the drawbacks of conventional P&O MPPT method associated with the use of constant perturbation size that leads to a poor transient response and high continuous steady-state oscillations. The prime objective of using the PR-P controller is to utilize inherited properties of the signal produced by the controller’s resonant path and integrate it to update best estimated perturbation that represents the working principle of extremum seeking control (ESC) to use in a P&O algorithm that characterizes the overall system learning-based real time adaptive (RTA). Additionally, utilization of internal dynamics of the PR-P controller overcome the challenges namely, complexity, computational burden, implantation cost and slow tracking performance in association with commonly used soft computing intelligent systems and adaptive control strategies. The experimental results and analysis reveal that the proposed control strategy enhanced the tracking speed five times with reduced steady-state oscillations around maximum power point (MPP) and more than 99% energy extracting efficiency.Third, the interleaved buck converter based photovoltaic (PV) emulator current control has been investigated. A proportional-resonant-proportional (PR-P) controller is designed to resolve the drawbacks of conventional PI controllers in terms of phase management which means balancing currents evenly between active phases to avoid thermally stressing and provide optimal ripple cancellation in the presence of parameter uncertainties. The proposed controller shows superior performance in terms of 10 times faster-converging transient response, zero steady-state error with significant reduction in current ripple. Equal load sharing that constitutes the primary concern in multi-phase converters has been achieved with the proposed controller. Implementing of robust control theory involving comprehensive time and frequency domain analysis reveals 13% improvement in the robust stability margin and 12-degree bigger phase toleration with the PR-P controller. Fourth, a symmetrical pole placement Method-based Unity Proportional Gain Resonant and Gain Scheduled Proportional (PR-P) Controller has been designed and investigated. The proposed PR-P controller resolved the issues associated with the use of the PI controller which are tracking repeating control input signal with zero steady-state and mitigating the 3rd order harmonic component injected into the grid for single-phase PV systems. Additionally, the PR-P controller has overcome the drawbacks of frequency detuning in the grid and increase in the magnitude of odd number harmonics in the system that constitute the common concerns in the implementation of conventional PR controller. Moreover, the unprecedented design process based on changing notch filter dynamics with symmetrical pole placement around resonant frequency overcomes the limitations that are essentially complexity and dependency on the precisely modelled system. The verification and validation process of the proposed control schemes has been conducted using MATLAB/Simulink and implementing MATLAB/Simulink/State flow on dSPACE Real-time-interface (RTI) 1007 processor, DS2004 High-Speed A/D and CP4002 Timing and Digital I/O boards. E-Thesis Swansea PV systems, MPPT algorithms, control systems, mitigation of the harmonic components, grid connected PV systems, cascade PI controller, model reference adaptive controller, extremum seeking control, Proportional resonant controller mathematical modelling of the converters, state-space averaging technique, time and frequency domain analysis of the derived transfer functions 27 9 2022 2022-09-27 10.23889/SUthesis.61504 Full title of thesis: Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems:Cascade PI Controller-Based Model Reference Adaptive Control, Notch Filter Dynamics-based PR-P Controller Designed by Symmetrical Pole Placement Method, Extremum Seeking Adaptive Control COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University Zhou, Zhongfu ; Egwebe, Augustine Doctoral Ph.D Turkish Government 2022-10-10T15:32:49.8204056 2022-10-10T15:15:33.4247249 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Cagfer Yanarates 1 61504__25388__832f4311043a40f1bbb6421f6059689a.pdf Yanarates_Cagfer_PhD_Thesis_Final_Redacted_Signature.pdf 2022-10-10T15:32:13.9248836 Output 5674126 application/pdf E-Thesis – open access true Copyright: The author, Cagfer Yanarates, 2022. Released under the terms of a Creative Commons Attribution-Only (CC-BY) License. Third party content is excluded for use under the license terms. true eng https://creativecommons.org/licenses/by/4.0/
title Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems
spellingShingle Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems
Cagfer Yanarates
title_short Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems
title_full Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems
title_fullStr Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems
title_full_unstemmed Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems
title_sort Design and Implementation of Control Techniques of Power Electronic Interfaces for Photovoltaic Power Systems
author_id_str_mv 95ba73ee6da5f81f21523b1b59b184bb
author_id_fullname_str_mv 95ba73ee6da5f81f21523b1b59b184bb_***_Cagfer Yanarates
author Cagfer Yanarates
author2 Cagfer Yanarates
format E-Thesis
publishDate 2022
institution Swansea University
doi_str_mv 10.23889/SUthesis.61504
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description The aim of this thesis is to scrutinize and develop four state-of-the-art power electronics converter control techniques utilized in various photovoltaic (PV) power conversion schemes accounting for maximum power extraction and efficiency. First, Cascade Proportional and Integral (PI) Controller-Based Robust Model Reference Adaptive Control (MRAC) of a DC-DC boost converter has been designed and investigated. Non-minimum phase behaviour of the boost converter due to right half plane zero constitutes a challenge and its non-linear dynamics complicate the control process while operating in continuous conduction mode (CCM). The proposed control scheme efficiently resolved complications and challenges by using features of cascade PI control loop in combination with properties of MRAC. The accuracy of the proposed control system’s ability to track the desired signals and regulate the plant process variables in the most beneficial and optimised way without delay and overshoot is verified. The experimental results and analysis reveal that the proposed control strategy enhanced the tracking speed two times with considerably improved disturbance rejection. Second, (P)roportional Gain (R)esonant and Gain Scheduled (P)roportional (PR-P) Controller has been designed and investigated. The aim of this controller is to create a variable perturbation size real-time adaptive perturb and observe (P&O) maximum power point tracking (MPPT) algorithm. The proposed control scheme resolved the drawbacks of conventional P&O MPPT method associated with the use of constant perturbation size that leads to a poor transient response and high continuous steady-state oscillations. The prime objective of using the PR-P controller is to utilize inherited properties of the signal produced by the controller’s resonant path and integrate it to update best estimated perturbation that represents the working principle of extremum seeking control (ESC) to use in a P&O algorithm that characterizes the overall system learning-based real time adaptive (RTA). Additionally, utilization of internal dynamics of the PR-P controller overcome the challenges namely, complexity, computational burden, implantation cost and slow tracking performance in association with commonly used soft computing intelligent systems and adaptive control strategies. The experimental results and analysis reveal that the proposed control strategy enhanced the tracking speed five times with reduced steady-state oscillations around maximum power point (MPP) and more than 99% energy extracting efficiency.Third, the interleaved buck converter based photovoltaic (PV) emulator current control has been investigated. A proportional-resonant-proportional (PR-P) controller is designed to resolve the drawbacks of conventional PI controllers in terms of phase management which means balancing currents evenly between active phases to avoid thermally stressing and provide optimal ripple cancellation in the presence of parameter uncertainties. The proposed controller shows superior performance in terms of 10 times faster-converging transient response, zero steady-state error with significant reduction in current ripple. Equal load sharing that constitutes the primary concern in multi-phase converters has been achieved with the proposed controller. Implementing of robust control theory involving comprehensive time and frequency domain analysis reveals 13% improvement in the robust stability margin and 12-degree bigger phase toleration with the PR-P controller. Fourth, a symmetrical pole placement Method-based Unity Proportional Gain Resonant and Gain Scheduled Proportional (PR-P) Controller has been designed and investigated. The proposed PR-P controller resolved the issues associated with the use of the PI controller which are tracking repeating control input signal with zero steady-state and mitigating the 3rd order harmonic component injected into the grid for single-phase PV systems. Additionally, the PR-P controller has overcome the drawbacks of frequency detuning in the grid and increase in the magnitude of odd number harmonics in the system that constitute the common concerns in the implementation of conventional PR controller. Moreover, the unprecedented design process based on changing notch filter dynamics with symmetrical pole placement around resonant frequency overcomes the limitations that are essentially complexity and dependency on the precisely modelled system. The verification and validation process of the proposed control schemes has been conducted using MATLAB/Simulink and implementing MATLAB/Simulink/State flow on dSPACE Real-time-interface (RTI) 1007 processor, DS2004 High-Speed A/D and CP4002 Timing and Digital I/O boards.
published_date 2022-09-27T04:20:22Z
_version_ 1763754348272156672
score 11.016302

Similar Items