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An Adaptive Passivity‐Based Controller of a Buck‐Boost Converter with a Constant Power Load
Author(s) -
He Wei,
Ortega Romeo,
Machado Juan E.,
Li Shihua
Publication year - 2019
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1002/asjc.1751
Subject(s) - control theory (sociology) , passivity , controller (irrigation) , constant (computer programming) , computer science , buck converter , power (physics) , boost converter , adaptive estimator , estimator , interconnection , voltage , mathematics , engineering , control (management) , computer network , agronomy , statistics , physics , electrical engineering , quantum mechanics , artificial intelligence , biology , programming language
This paper addresses the problem of regulating the output voltage of a DC‐DC buck‐boost converter feeding a constant power load, which is a problem of current practical interest. Designing a stabilising controller is theoretically challenging because its average model is a bilinear second order system that, due to the presence of the constant power load, is non‐minimum phase with respect to both states. Moreover, to design a high‐performance controller, the knowledge of the extracted load power, which is difficult to measure in industrial applications, is required. In this paper, an adaptive interconnection and damping assignment passivity‐based control—that incorporates the immersion and invariance parameter estimator for the load power—is proposed to solve the problem. Some detailed simulations are provided to validate the transient behaviour of the proposed controller and compare it with the performance of a classical PD scheme.