A Smart Battery Charger Based on a Cascaded Boost-Buck Converter for Photovoltaic Applications

Triki, Yacine; Bechouche, Alı; Seddiki, Hamid; Abdeslam, Djaffar Ould

doi:10.1109/iecon.2018.8591349

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…Therefore, the conditions i R = i L1 (t +ΔT) and k r < 1 are necessary to fulfill the inequality given in (17). However, such a theoretical limitation on k r is fulfilled by a value slightly lower than 1, hence k r → 1 − , that is, the closest value to 1 on the left.…”

Section: Reachability Conditionsmentioning

confidence: 97%

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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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Section: Reachability Conditionsmentioning

confidence: 97%

“…Such a charger/discharger has been extensively used due to it provides a positive compromise between simplicity and performance. 16,17 Moreover, both linear controllers and SMCs have been designed to ensure a stable operation of the DC-bus voltage. 3,4,18 In particular, the work reported in ref.…”

Section: Discharger Circuitmentioning

confidence: 99%

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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“…A control design methodology must be applied in order to achieve a stable, full and quick Le-A battery charging operation. The design of the charge controller proposed in this paper is based on the DIN 41773 standard that offers three charging stages [17], which are: Bulk, absorption and float stages as shown in figure 7. The first stage consists of the bulk charge, in this state, the first effective FLC act to extract the maximum power of the PV panel, in this way, the Le-A battery is charged via a constant current up to 80 of the SOC.…”

Section: Le-acid Battery Charging Controlmentioning

confidence: 99%

An intelligent lead-acid battery closed-loop charger using a combined fuzzy controller for PV applications

et al. 2021

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This paper presents the modeling of an intelligent combined MPPT and Lead-Acid battery charger controller for standalone solar photovoltaic systems. It involves the control of a DC/DC buck converter through a control unit, which contains two cascaded fuzzy logic controllers (FLC), that adjusts the required duty cycle of the converter according to the state of charge and the three stage lead acid battery charging system. The first fuzzy logic controller (FLC1) consists of an MPPT controller to extract the maximum power produced by the PV array, while the second fuzzy controller (FLC2) is aimed to control the voltage across the battery to ensure the three stage charging approach. This solution of employing two distinct cascaded fuzzy controllers surmounts the drawbacks of the classical chargers in which the voltage provided to the lead acid battery is not constant owing to the effects of the MPPT control which can automatically damage the battery. Thus, the suggested control strategy has the benefit of extracting the full power against the PV array, avoiding battery damage incurred by variable MPPT voltage and increasing the battery’s lifespan.

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“…Considering a safety margin for switch devices, the voltage rating of all the devices can be expressed as: where the K 2 stands for the safety margin for the power devices, which always chosen to 0.6 in the actual implemental stage. The required energy decreased significantly with the increase of α L , while the voltage ratings for the devices increase as shown in equation (12). These contradictions prompt us to seek a reasonable value for the α L .…”

Section: A Design Constraint Of αLmentioning

confidence: 99%

“…In contrast, the two-switch buck-boost (TSBB) topologies are suitable candidates for a wide output range of converter operations [10]. The TSBB is usually composed of boost, buck, or buckboost cascade combination, which offers step-up and stepdown operations with much-reduced voltage stress on the components, and is widely adopted in PV [11], [12], wireless power transfer systems [13], and PFC applications [14]- [16]. Among them, the combinations with buck stage in front, such as cascaded buck-boost [17] and interleaved-cascaded buck-boost converters [18], are not efficient in economic and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Two-Stage Operation and Control for Minimizing Energy Storage Capacitors in Cascaded Boost-Buck PFC Converters

et al. 2020

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Cascaded boost-buck PFC (CBBPFC) converters offer a wide voltage conversion ratio and a near-unity power factor but require a large output electrolytic capacitor, leading to poor reliability and power density. In this paper, a coordinated two-stage operation and control strategy is proposed to significantly minimize the capacitor requirement without any other hardware changes. In a conventional CBBPFC converter, the boost and buck stages either operate independently nor complementally. In contrast, the proposed method operates the two stages in a concerted manner, so it is possible to use the dc-link capacitor with certain voltage fluctuation to buffer the power imbalance between the AC input and DC output. A new coordinated control strategy and a fluctuation-ratio based design consideration are developed to coordinate the operation of the two stages, further complement the system design. A 200W CBBPFC prototype based on the design concept exhibits a maximum reduction of the output capacitor by 83%, a peak efficiency of 95.8%, and a power factor of 0.99.

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A Smart Battery Charger Based on a Cascaded Boost-Buck Converter for Photovoltaic Applications

Cited by 14 publications

References 7 publications

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

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

An intelligent lead-acid battery closed-loop charger using a combined fuzzy controller for PV applications

Coordinated Two-Stage Operation and Control for Minimizing Energy Storage Capacitors in Cascaded Boost-Buck PFC Converters

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