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Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator

Cagfer Yanarates, Zhongfu Zhou Orcid Logo

Energy Science & Engineering, Volume: 10, Issue: 1, Pages: 155 - 176

Swansea University Authors: Cagfer Yanarates, Zhongfu Zhou Orcid Logo

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DOI (Published version): 10.1002/ese3.1018

Abstract

In this study, the interleaved buck converter-based photovoltaic (PV) emulator current control is presented. 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...

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Published in: Energy Science & Engineering
ISSN: 2050-0505 2050-0505
Published: Wiley 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa58723
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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 cancelation in the presence of parameter uncertainties. The resonant path of the controller (PR) with a constant proportional unity gain is designed considering the changing dynamics of a notch filter by pole placement method (adding mutually complementary poles to the notch transfer function) at PWM switching frequency. The proportional gain path (P) of the controller is used to determine the compatibility of the controller with parameter uncertainty of the phases and designed by utilizing loop-shaping method. 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 multiphase converters is 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. In addition to these, the proposed unconventional design process of the controller reduces the computational complexity and provides cost-effectiveness and simple implementation. 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spelling 2022-01-06T16:47:26.0316675 v2 58723 2021-11-22 Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator 95ba73ee6da5f81f21523b1b59b184bb Cagfer Yanarates Cagfer Yanarates true false 614fc57cde2ee383718d4f4c462b5fba 0000-0002-0843-7253 Zhongfu Zhou Zhongfu Zhou true false 2021-11-22 FGSEN In this study, the interleaved buck converter-based photovoltaic (PV) emulator current control is presented. 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 cancelation in the presence of parameter uncertainties. The resonant path of the controller (PR) with a constant proportional unity gain is designed considering the changing dynamics of a notch filter by pole placement method (adding mutually complementary poles to the notch transfer function) at PWM switching frequency. The proportional gain path (P) of the controller is used to determine the compatibility of the controller with parameter uncertainty of the phases and designed by utilizing loop-shaping method. 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 multiphase converters is 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. In addition to these, the proposed unconventional design process of the controller reduces the computational complexity and provides cost-effectiveness and simple implementation. Moreover, implementing of auxiliary resistor-capacitor (RC) circuits parallel with the inductors to sense the current in each phase removes the need for current measurement sensors that contribute to overall cost of the system. Journal Article Energy Science & Engineering 10 1 155 176 Wiley 2050-0505 2050-0505 auxiliary resistor-capacitor (RC) circuit; interleaved buck converter; lossless current sensing; proportional-resonant-proportional (PR-P) current controller; PV emulator (PVE); state-space average modelling 2 1 2022 2022-01-02 10.1002/ese3.1018 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University SU College/Department paid the OA fee This work was supported in part by the European Regional Development Fund (ERDF) through the FLEXIS Project REIS Ref EGR1024 (104) - 16/17 - ERDF West Wales and the Valleys WEFO - FLEXIS - DEVELOPING FLEXIBLE ENERGY SYSTEMS £2062623 2022-01-06T16:47:26.0316675 2021-11-22T09:53:26.6993986 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Cagfer Yanarates 1 Zhongfu Zhou 0000-0002-0843-7253 2 58723__21828__cf402c3ce4124589b9e2d24d19a2c606.pdf 58723.pdf 2021-12-07T11:52:40.4607237 Output 3049904 application/pdf Version of Record true © 2021 The Authors. This is an open access article under the terms of the Creative Commons Attribution License true eng http://creativecommons.org/licenses/by/4.0/
title Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator
spellingShingle Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator
Cagfer Yanarates
Zhongfu Zhou
title_short Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator
title_full Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator
title_fullStr Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator
title_full_unstemmed Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator
title_sort Fast‐converging robust PR‐P controller designed by using symmetrical pole placement method for current control of interleaved buck converter‐based PV emulator
author_id_str_mv 95ba73ee6da5f81f21523b1b59b184bb
614fc57cde2ee383718d4f4c462b5fba
author_id_fullname_str_mv 95ba73ee6da5f81f21523b1b59b184bb_***_Cagfer Yanarates
614fc57cde2ee383718d4f4c462b5fba_***_Zhongfu Zhou
author Cagfer Yanarates
Zhongfu Zhou
author2 Cagfer Yanarates
Zhongfu Zhou
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container_title Energy Science & Engineering
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publishDate 2022
institution Swansea University
issn 2050-0505
2050-0505
doi_str_mv 10.1002/ese3.1018
publisher Wiley
college_str Faculty of Science and Engineering
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hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
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department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
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description In this study, the interleaved buck converter-based photovoltaic (PV) emulator current control is presented. 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 cancelation in the presence of parameter uncertainties. The resonant path of the controller (PR) with a constant proportional unity gain is designed considering the changing dynamics of a notch filter by pole placement method (adding mutually complementary poles to the notch transfer function) at PWM switching frequency. The proportional gain path (P) of the controller is used to determine the compatibility of the controller with parameter uncertainty of the phases and designed by utilizing loop-shaping method. 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 multiphase converters is 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. In addition to these, the proposed unconventional design process of the controller reduces the computational complexity and provides cost-effectiveness and simple implementation. Moreover, implementing of auxiliary resistor-capacitor (RC) circuits parallel with the inductors to sense the current in each phase removes the need for current measurement sensors that contribute to overall cost of the system.
published_date 2022-01-02T04:15:29Z
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