Second-order sliding mode controller design of buck converter with constant power load

Kaplan, Orhan; Bodur, Ferhat

doi:10.1080/00207179.2022.2037718

Cited by 22 publications

(18 citation statements)

References 42 publications

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“…In the design of SM controllers applied in DC-DC converters, the first-and second-order SM control methods are mainly used at present [58], [59]. The controller design usually consists of a sliding surface and a continuous or discontinuous control law design.…”

Section: B Description Of the Sm Controllermentioning

confidence: 99%

Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

2022

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In this paper, a novel adaptive continuous sliding mode (SM) control approach is proposed based on the robust stability analysis of buck converters with multi-disturbances. Instead of the traditional first-order SM methods, the twisting algorithm is adopted to realize the control continuity and further weaken their inherent chattering problem. By introducing the zero-crossing detection innovatively, the influence of the traditional twisting algorithm with fixed control gain led to the low precision is effectively eliminated, and the small region can be controlled due to the implementation of the adaptive time-varying control gain. In addition, the magnitude of the controller can be reduced to a minimal admissible level determined by the system stable conditions and the selection of optimization parameters. Furthermore, multiple model uncertainties and external disturbances are considered into the modeling of the buck converters and the proposed adaptive SM controllers to ensure the strong robustness of the whole system while suffering possible disturbances. Finally, comparative simulations and experiments are given to validate the effectiveness of the proposed adaptive control strategy.INDEX TERMS Adaptive continuous sliding mode control, buck converters, zero-crossing detection, multidisturbances, twisting sliding mode control.

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Section: B Description Of the Sm Controllermentioning

confidence: 99%

Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

2022

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“…Taking into consideration ( 5), (11), and ( 13), one can calculate the estimation of the total power of loads as:…”

Section: Ftsmdo For Power Estimationmentioning

confidence: 99%

“…In a large-signal sense, numerous nonlinear strategies such as feedback-linearisation technique [9,10], sliding-mode control method [11,12], backstepping control technique [13,14], combination of sliding-mode with backstepping control [15], model predictive control [16,17], the fuzzy method [18], the combination of fuzzy with model predictive control [19], deep reinforcement learning method [20], passivity-based control [21] have been conducted to minimise destabilisation effects of CPLs on the DC microgrids. It can be observed that the represented schemes [9][10][11][12][13][14][15][16][17][18][19][20][21] stabilise the entire power system with an asymptotical convergence rate in infinite time, which may not be adequate for abrupt changes in various system operating states and stepwise load variations. One way of overcoming this challenge is to establish a finite-time control strategy, which not only accelerates the converging speed but also provides strong robustness in the face of uncertainties, and improves disturbance attenuation.…”

Section: Introductionmentioning

confidence: 99%

A novel fixed‐time dynamic surface DC/DC SEPIC converter controller loaded by uncertain buck‐based constant power loads

Sarrafan

Horiyat

Zarei

et al. 2022

IET Power Electronics

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The stability analysis of the single‐ended primary‐inductor converter DC/DC converters feeding constant power loads (CPLs) is of major importance. The nonlinear behaviour of CPLs and their negative incremental impedance, which impose adverse effects on system damping and stability margins, necessitate developing proper strategies for an efficient implementation framework of DC microgrid. In this paper, a fixed‐time sliding mode disturbance observer is first addressed to provide an estimation of the power flow moving along the uncertain CPLs with time‐varying nature within a fixed time. It not only expedites the estimation rate but also improves the robustness against physical parameter variation. The fixed‐time dynamic surface control law is then developed based on the estimated load power for the duty cycle of the switch such that the entire power grid becomes stable and the desired voltage of the DC bus is tracked within a fixed time irrespective of the initial conditions. A rigorous Lyapunov‐based approach is represented to guarantee the semi‐global fixed‐time uniform ultimate boundedness of the proposed scheme. Finally, in order to verify the proposed methodology's strengths, Model‐in‐the‐Loop real‐time simulations are performed under various operating case studies.

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“…The versatility of this converter makes it suitable for low and high-power applications. Among the main applications of the DC-DC buck converters, one can see their use in micro-grids [3][4][5][6], renewable energy systems [1,7,8], photovoltaic systems and battery charging [9,10], LED driver and energy management [11,12], speed control of DC and AC motor drivers [2,13] and so on.…”

Section: Introductionmentioning

confidence: 99%

On the Sliding Mode Control Applied to a DC-DC Buck Converter

et al. 2023

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This work shows the voltage regulation of a DC–DC buck converter by applying sliding mode control using three different cases of sliding surfaces. The DC–DC buck converter is modeled by ordinary differential equations (ODEs) that are solved by applying numerical methods. The ODEs describe two state variables that are associated to the capacitor voltage and the inductor current. The state variable associated to voltage is regulated by applying two well-known sliding surfaces and a third one that is introduced herein to improve the response of the sliding mode control. The stability of the proposed sliding surface is verified by using a Lyapunov theorem to guarantee closed-loop stability. Finally, simulation results show the improvement of voltage regulation when applying the proposed sliding surface compared to already reported approaches.

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Second-order sliding mode controller design of buck converter with constant power load

Cited by 22 publications

References 42 publications

Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

Adaptive Continuous Sliding Mode Control of Buck Converters With Multidisturbances Based on Zero-Crossing Detection

A novel fixed‐time dynamic surface DC/DC SEPIC converter controller loaded by uncertain buck‐based constant power loads

On the Sliding Mode Control Applied to a DC-DC Buck Converter

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