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

He, Wei; Namazi, Mohammad Masoud; Koofigar, Hamid Reza; Amirian, Mohammad Ali; Blaabjerg, Frede

doi:10.1049/pel2.12205

Cited by 19 publications

(9 citation statements)

References 54 publications

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“…With the goal of handling the issue of unknown but constant parameters and to increase the robustness of the proposed controller scheme ( 30 ), an adaptation law based on I&I theory detailed in [ 33 , 34 ] is designed. It is well documented in the literature that this theory has been extensively applied to the design of nonlinear systems, state observers [ 45 ], stabilizing control laws [ 46 ], and parameter estimators [ 47 ]. The idea in this work is to compute both the estimation

of the load conductance

and

of the parasite resistance

and use these values in a certainty-equivalent way for the inner loop controller.…”

Section: Passivity-based Controller Designmentioning

confidence: 99%

Passivity-Based Control for Output Voltage Regulation in a Fuel Cell/Boost Converter System

et al. 2023

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In this paper, a passivity-based control (PBC) scheme for output voltage regulation in a fuel-cell/boost converter system is designed and validated through real-time numerical results. The proposed control scheme is designed as a current-mode control (CMC) scheme with an outer loop (voltage) for voltage regulation and an inner loop (current) for current reference tracking. The inner loop’s design considers the Euler–Lagrange (E-L) formulation to implement a standard PBC and the outer loop is implemented through a standard PI controller. Furthermore, an adaptive law based on immersion and invariance (I&I) theory is designed to enhance the closed-loop system behavior through asymptotic approximation of uncertain parameters such as load and inductor parasitic resistance. The closed-loop system is tested under two scenarios using real-time simulations, where precision and robustness are shown with respect to variations in the fuel cell voltage, load, and output voltage reference.

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of the load conductance

and

of the parasite resistance

and use these values in a certainty-equivalent way for the inner loop controller.…”

Section: Passivity-based Controller Designmentioning

confidence: 99%

Passivity-Based Control for Output Voltage Regulation in a Fuel Cell/Boost Converter System

et al. 2023

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“…Other authors have implemented control using nonlinear methods such as passivity-based control, exact feedback control, and sliding mode control. These methods ensure stability properties in the sense of Lyapunov during closed-loop operation [8], [9], [19]. Even though these controllers are efficient, they rely heavily on the parameters of second-order DC-DC converters, i.e., inductors and capacitors.…”

Section: B Motivationmentioning

confidence: 99%

“…The advantages of DC systems over their AC counterparts also pose significant challenges regarding operation and control, as power electronic converters for DC applications introduce nonlinearities in grid operation. Due to forced-commutated switches, these nonlinearities are added, along with the possible presence of multiple nonlinear loads connected into the DC microgrids [8], [9], [10]. Nonlinear loads in DC networks typically correspond to the constant power terminals, where the relation between voltages and powers takes a hyperbolic form [11], [12], [13], and [14].…”

Section: Introduction a General Contextmentioning

confidence: 99%

Adaptive Voltage Control for Second-Order DC–DC Converters Supplying an Unknown Constant Power Load: A Generalized PBC Plus Damping Injection Design

et al. 2023

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This paper presents a generalized controller design to regulate the output voltage of secondorder DC-DC converters feeding an unknown constant power load (CPL). Passivity-based control plus damping injection theory is employed to design a generalized action control to stabilize DC-DC converters. Furthermore, starting from the immersion and invariance (I&I) method, a generalized observer for secondorder DC-DC converters is implemented to estimate the CPL value. By mixing the proposed controller with the I&I method, an adaptive generalized control approach is presented, which guarantees the locally asymptotic stability of the closed-loop for each converter. The main advantage of the nonlinear adaptive control design is its nonparametric dependence on the capacitance and inductance values, which makes it robust against parametric uncertainties. Phase portrait and sensitivity analyses are performed, and simulation and experimental results are examined to evaluate the performance of the proposed approach, which is also compared against feedback linearization and sliding mode control. Simulation and experimental results show the robustness and effectiveness of the adaptive proposed control approach.INDEX TERMS Second-order DC-DC converters, constant power load, passivity-based control, damping injection design, adaptive generalized control, immersion and invariance. NOMENCLATURE Acronyms ACAlternating current. CPL Constant power load. DC Direct current. FLC Sliding mode control.

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“…Due to the presence of a DC bus in the three-port converter structure of 'RPC+storage' [9,28,29], the bus voltage fluctuation is also more severe than that of the DC side of a single RPC. In addition, when the energy storage device is operating in constant power or constant current charging state, the negative impedance characteristics of its ports lead to more prominent system stability and reliability problems [49][50][51][52]. Compared with the 'RPC+storage' structure, the proposed scheme has a simpler converter structure.…”

Section: Safety Reliability and Cost Of The Proposed Schemementioning

confidence: 99%

An effective utilization scheme for regenerative braking energy based on power regulation with a genetic algorithm

Cheng

Wang

et al. 2022

IET Power Electronics

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To ensure that regenerative braking energy is fully utilized by traction trains in the whole railway power supply systems, an effective utilization scheme of the regenerative braking energy based on power regulation with a genetic algorithm (GA) is proposed in this paper. This scheme consists of railway power conditioners (RPCs), energy transfer converters (ETCs) and a central controller. A RPC connects the two power arms of each TS, and an ETC connects the two power arms of each section post (SP). The RPCs and ETCs are controlled to transfer the regenerative braking power distributed by the central controller, which is calculated by the GA. The detailed calculation steps are described. Moreover, the principle and control strategies of the negative sequence current compensation by the RPCs are given based on the optimization results of the GA. Finally, optimization calculations and hardware in loop (HIL) experiments were performed. The results show that the utilization rate of regenerative braking energy is about 93.3% and the three-phase current imbalance is reduced by about 98.6% in the case system with the proposed scheme. This result verifies the effectiveness and feasibility of the proposed scheme.

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

Cited by 19 publications

References 54 publications

Passivity-Based Control for Output Voltage Regulation in a Fuel Cell/Boost Converter System

Passivity-Based Control for Output Voltage Regulation in a Fuel Cell/Boost Converter System

Adaptive Voltage Control for Second-Order DC–DC Converters Supplying an Unknown Constant Power Load: A Generalized PBC Plus Damping Injection Design

An effective utilization scheme for regenerative braking energy based on power regulation with a genetic algorithm

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