Design of Nonlinear Backstepping Double-Integral Sliding Mode Controllers to Stabilize the DC-Bus Voltage for DC–DC Converters Feeding CPLs

Ghosh, Subarto Kumar, Roy, Tushar Kanti, Pramanik, Md. Abu Hanif and Mahmud, Md Apel (2021) Design of Nonlinear Backstepping Double-Integral Sliding Mode Controllers to Stabilize the DC-Bus Voltage for DC–DC Converters Feeding CPLs. Energies, 14 (20). p. 6753. ISSN 1996-1073

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Official URL: https://doi.org/10.3390/en14206753

Abstract

This paper proposes a composite nonlinear controller combining backstepping and double-integral sliding mode controllers for DC–DC boost converter (DDBC) feeding by constant power loads (CPLs) to improve the DC-bus voltage stability under large disturbances in DC distribution systems. In this regard, an exact feedback linearization approach is first used to transform the nonlinear dynamical model into a simplified linear system with canonical form so that it becomes suitable for designing the proposed controller. Another important feature of applying the exact feedback linearization approach in this work is to utilize its capability to cancel nonlinearities appearing due to the incremental negative-impedance of CPLs and the non-minimum phase problem related to the DDBC. Second, the proposed backstepping double integral-sliding mode controller (BDI-SMC) is employed on the feedback linearized system to determine the control law. Afterwards, the Lyapunov stability theory is used to analyze the closed-loop stability of the overall system. Finally, a simulation study is conducted under various operating conditions of the system to validate the theoretical analysis of the proposed controller. The simulation results are also compared with existing sliding mode controller (ESMC) and proportional-integral (PI) control schemes to demonstrate the superiority of the proposed BDI-SMC.

Item Type: Article
Uncontrolled Keywords: Backstepping double-integral sliding mode control scheme, Constant power load, Exact feedback linearization approach, Lyapunov stability theory, Negative-resistance characteristics, Non-minimum phase, Nonlinear dynamical model
Subjects: H600 Electronic and Electrical Engineering
H800 Chemical, Process and Energy Engineering
H900 Others in Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 17 Nov 2021 10:26
Last Modified: 17 Nov 2021 10:30
URI: http://nrl.northumbria.ac.uk/id/eprint/47754

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