Dual loop controllers using PI, sliding mode and flatness controls applied to low voltage converters for fuel cell applications

Saadi, R.; Kraa, O.; Ayad, M. Y.; Becherif, Mohamed; Ghodbane, Hatem; Bahri, M.; Aboubou, A.

doi:10.1016/j.ijhydene.2016.08.171

Cited by 37 publications

(13 citation statements)

References 18 publications

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“…In the literature, it is possible to find different charging, 2 discharging, 9,10 and charging/discharging 11,12 systems based on interleaved converters, which are used for different applications and use linear 2,13 and nonlinear 4,10 controllers. The authors in ref.…”

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confidence: 99%

“…10,14,15 In those papers, the authors use cascade controllers, where the inner loop is a sliding mode controller (SMC) of the inductors current, and the outer loop regulates the DC-bus voltage with a controller based on flatness theory. 10,14,15 In those papers, the authors use cascade controllers, where the inner loop is a sliding mode controller (SMC) of the inductors current, and the outer loop regulates the DC-bus voltage with a controller based on flatness theory.…”

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confidence: 99%

“…A combination of nonlinear controllers for interleaved Boost converters are proposed in ref. 10,14,15 In those papers, the authors use cascade controllers, where the inner loop is a sliding mode controller (SMC) of the inductors current, and the outer loop regulates the DC-bus voltage with a controller based on flatness theory. The SMC proposed in ref.…”

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confidence: 99%

“…The SMC proposed in ref. 10,14 uses a switching function formed by a linear combination of the inductor current error and the integral of that value. However, the authors do not analyze the time shift required between the duty cycles of the two converter branches.…”

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confidence: 99%

“…Additionally, the outer loop controllers in ref. 10,14 manipulate the power delivered or absorbed by the ESS, which is translated in a reference for the inner loop (SMC).…”

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confidence: 99%

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Charger/discharger DC/DC converter with interleaved configuration for DC‐bus regulation and battery protection

Villegas-Ceballos

Serna-Garcés

Montoya

et al. 2019

Energy Science & Engineering

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Regulation of DC‐bus voltages is important for the stable operation of different applications, like microgrids and electric vehicles, and it is usually performed by charging/discharging (C/D) batteries. Such C/D system is formed by a power converter and a control system, and it is aimed at guaranteeing the system stability and extending the battery life. To extend the battery life, it is important to reduce the battery current ripples, which is usually performed with interleaved converters and nonlinear controllers; however, most of those controllers do not provide the design procedure nor guarantee the system stability. This paper proposes a nonlinear control strategy to regulate the voltage in a DC‐bus by C/D a battery through a two‐branch interleaved Boost converter. The proposed control strategy is formed by two sliding mode controllers (SMCs), where the first one regulates the DC‐bus voltage by acting on the first converter branch and the second SMC controls the current in the second branch. The reference of the second SMC is generated from the delayed current of the first branch, in order to coordinate the controllers and to reduce the ripples in the battery current. The paper includes a procedure to design the two SMCs as well as simulation and experimental results to validate the proposed solution and to illustrate its performance. The results prove the system stability and its dynamic performance according to the design.

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

“…Additionally, the outer loop controllers in ref. 10,14 manipulate the power delivered or absorbed by the ESS, which is translated in a reference for the inner loop (SMC).…”

mentioning

confidence: 99%

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