Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration

Abstract It is known that constant power load (CPL) may cause a negative impedance, which seriously affects the stability of power system. In this paper, a new control algorithm for DC–DC buck converter feeding unknown CPL is proposed. First, under the assumption of known extracted power load, the s...

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Autores principales:	Wei He, Mohammad Masoud Namazi, Hamid Reza Koofigar, Mohammad Ali Amirian, Frede Blaabjerg
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/1ac5bbad71d94c1eaef527559ba4e84d
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spelling	oai:doaj.org-article:1ac5bbad71d94c1eaef527559ba4e84d2021-11-22T13:36:45ZStabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration1755-45431755-453510.1049/pel2.12205https://doaj.org/article/1ac5bbad71d94c1eaef527559ba4e84d2021-12-01T00:00:00Zhttps://doi.org/10.1049/pel2.12205https://doaj.org/toc/1755-4535https://doaj.org/toc/1755-4543Abstract It is known that constant power load (CPL) may cause a negative impedance, which seriously affects the stability of power system. In this paper, a new control algorithm for DC–DC buck converter feeding unknown CPL is proposed. First, under the assumption of known extracted power load, the standard passivity–based control (PBC) is presented to reshape the system energy and compensate for the negative impedance and a proportion‐integration (PI) action around passive output is added to improve disturbance rejection performance, which forms the PBC plus PI (PBC+PI). Then, a parameter estimation algorithm is developed, based on immersion and invariance (I&I) technique, in order to online estimate the extracted power load. In the next step, the online estimation scheme is adopted to construct an adaptive strategy. Finally, the stability analysis of the cascaded system containing a closed‐loop control system and observer error dynamics is conducted. Simulation and experimental results are demonstrated to validate the performance of the proposed controller.Wei HeMohammad Masoud NamaziHamid Reza KoofigarMohammad Ali AmirianFrede BlaabjergWileyarticleElectronicsTK7800-8360ENIET Power Electronics, Vol 14, Iss 16, Pp 2597-2609 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electronics TK7800-8360
spellingShingle	Electronics TK7800-8360 Wei He Mohammad Masoud Namazi Hamid Reza Koofigar Mohammad Ali Amirian Frede Blaabjerg Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration
description	Abstract It is known that constant power load (CPL) may cause a negative impedance, which seriously affects the stability of power system. In this paper, a new control algorithm for DC–DC buck converter feeding unknown CPL is proposed. First, under the assumption of known extracted power load, the standard passivity–based control (PBC) is presented to reshape the system energy and compensate for the negative impedance and a proportion‐integration (PI) action around passive output is added to improve disturbance rejection performance, which forms the PBC plus PI (PBC+PI). Then, a parameter estimation algorithm is developed, based on immersion and invariance (I&I) technique, in order to online estimate the extracted power load. In the next step, the online estimation scheme is adopted to construct an adaptive strategy. Finally, the stability analysis of the cascaded system containing a closed‐loop control system and observer error dynamics is conducted. Simulation and experimental results are demonstrated to validate the performance of the proposed controller.
format	article
author	Wei He Mohammad Masoud Namazi Hamid Reza Koofigar Mohammad Ali Amirian Frede Blaabjerg
author_facet	Wei He Mohammad Masoud Namazi Hamid Reza Koofigar Mohammad Ali Amirian Frede Blaabjerg
author_sort	Wei He
title	Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration
title_short	Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration
title_full	Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration
title_fullStr	Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration
title_full_unstemmed	Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration
title_sort	stabilization of dc–dc buck converter with unknown constant power load via passivity‐based control plus proportion‐integration
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/1ac5bbad71d94c1eaef527559ba4e84d
work_keys_str_mv	AT weihe stabilizationofdcdcbuckconverterwithunknownconstantpowerloadviapassivitybasedcontrolplusproportionintegration AT mohammadmasoudnamazi stabilizationofdcdcbuckconverterwithunknownconstantpowerloadviapassivitybasedcontrolplusproportionintegration AT hamidrezakoofigar stabilizationofdcdcbuckconverterwithunknownconstantpowerloadviapassivitybasedcontrolplusproportionintegration AT mohammadaliamirian stabilizationofdcdcbuckconverterwithunknownconstantpowerloadviapassivitybasedcontrolplusproportionintegration AT fredeblaabjerg stabilizationofdcdcbuckconverterwithunknownconstantpowerloadviapassivitybasedcontrolplusproportionintegration
_version_	1718417540425711616

Stabilization of DC–DC buck converter with unknown constant power load via passivity‐based control plus proportion‐integration

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