Energy processing from fuel-cell systems using a high-gain power dc-dc converter: Analysis, design, and implementation

Diaz-Saldierna, L. H.; Leyva-Ramos, J.; Langarica‐Cordoba, Diego; Ortiz-Lopez, M.G.

doi:10.1016/j.ijhydene.2021.05.046

Cited by 16 publications

(6 citation statements)

References 36 publications

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“…High power efficiency, low input current ripple, high voltage gain, and cheap cost should all be features of the DC-DC power converter. It is proposed to use a traditional boost converter to process the energy generated by a fuel-cell stack [14]. The device is made up of a filtering capacitor C, an inductor L, and two switches, as shown in figure 5, (Transistor T and diode D).…”

Section: Resultsmentioning

confidence: 99%

Future pem fuel cell system renewable energy systems based on hydrogen equipment for microgrid networks

Chaouki

Fedorovich

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The simulation results of a modest 6 KW fuel cell energy system employing technical control are presented in this study. Technical control and fuzzy logic the performance of the controller used for maximum power point tracking (MPPT) can improve the efficiency of the FC system when Particle Swarm Optimization (PSO) and the system Boost DC/DC Converter power converter that steps up voltage (while stepping down current) from its input (supply) to its output (load) are compared. An electrolyzer with a proton exchange membrane fuel cell (PEMFC). This paper presents dynamic modeling of various components of a small isolated system. The dynamic modeling of this nonlinear 45 Vdc energy system is done with Simulink. The simulation findings are analyzed, as well as the constraints of a fuel cell energy system. The hydrogen produced is used by the third operating subsystem (the fuel cell stack), which generates electricity to power the DC bus. The global system is modeled, and the results are presented and analyzed. Due to its better efficiency, clean operation, and cost-effective supply of power sought by consumers, fuel cell (FC) technology has attracted substantial attention as an alternative to traditional power units among the numerous renewable energy sources. In the SIMULINK environment, the proposed model is implemented. The simulation outcomes are examined.

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Section: Resultsmentioning

confidence: 99%

Future pem fuel cell system renewable energy systems based on hydrogen equipment for microgrid networks

Chaouki

Fedorovich

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The duty ratio is

U = V_{o} / V_{s} = 0.4286

and, with

normalΔ V_{o} = 0.005 V_{o}

and

normalΔ I_{L} = 0.2 I_{L}

, we obtain

L = 6.74 italicμH

and

C_{o} = 211.81 italicμF

from (), guaranteeing that the FCS operates in continuous conduction mode 61 . The input capacitor

C_{s} = 520 italicμF

is used to avoid damage of the fuel cell stack due to high‐frequency current ripples as suggested in 62.…”

Section: Case Studiesmentioning

confidence: 99%

A robust energy processing method for fuel cell systems supplying a time‐varying uncertain load

Ramírez

2022

Intl J of Energy Research

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Summary Robustness and performance are key properties that can contribute to the widespread dissemination of fuel cell systems (FCSs) as power sources, and a precise output voltage can serve as a reliable criterion to evaluate these properties. In this paper, we propose to utilize intentional time delays as part of controllers to achieve proper output voltage regulation in an FCS. In the past few years, there has been a growing interest toward designing controllers with intentional delays to render improved responses and better noise attenuation capabilities in various classes of systems and this investigation extends the use of delay‐based controllers to the application field of FCSs. A natural progression of this research, which to our knowledge has not been addressed, pertains to how such controllers perform in the presence of uncertainties, and whether or not these controllers can accommodate these uncertainties. In this research work, we present a solution to this open problem on a class of proportional integral retarded (PIR) controllers when controlling an FCS supplying a time‐varying uncertain load. Through stability theory, the safe operation of the PIR controlled FCS is systematically guaranteed in spite of uncertain loads and input voltages. Specifically, based on Lyapunov methods and L2‐gain analysis, we derive simple stability conditions to achieve robustness and H∞ performance. We show that utilizing only output voltage measurements the PIR controller can maintain the predictive features of a pure differentiator, but without its inherent noise amplification problems. Hence, low‐pass filtering of signals or reconstruction of the states can be obviated. Compared with published control schemes for FCSs, the PIR controller is structurally simpler and practically realizable, and it is able to maintain robustness against uncertain loads and H∞ performance under exogenous signals without relying on disturbance estimators. Numerical simulations confirm the superiority of the PIR controller over benchmark proportional integral and proportional integral derivative controllers in terms of robustness, performance and noise attenuation capabilities.

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“…In this section, the controller design stage is shown in detail. As described by [21], since buck-boost-and boost-type converters exhibit non-minimum phase behavior from the control signal to the output voltage, direct output (single-loop) voltage control cannot be implemented for this system. Alternatively, as shown in Figure 4, current-mode (doubleloop) control was selected to ensure a stable output voltage regulation and a suitable current tracking.…”

Section: Controller Design For Output Voltage Regulationmentioning

confidence: 99%

A PI + Sliding-Mode Controller Based on the Discontinuous Conduction Mode for an Unidirectional Buck–Boost Converter with Electric Vehicle Applications

et al. 2021

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This paper solves the buck–boost converter operation problem in the discontinuous conduction mode and the feeding a DC bus of a combined battery/solar-powered electric vehicle grid. Since the sun’s radiation has a very important effect on the performance of photovoltaic solar modules due to its continuous variation, the main task of the system under study is the regulation of the output voltage from an MPPT system located at the output of the panels in order to obtain a DC bus voltage that is fixed to 24 V. This is ensured via a double-loop scheme, where the current inner loop relies on sliding-mode control; meanwhile, the outer voltage loop considers a proportional–integral action. Additionally, the current loop implements an adaptive hysteresis logic in order to operate at a fixed frequency. The closed-loop system’s performance is checked via numerical results with respect to step changes in the load, input voltage, and output voltage reference variations.

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Energy processing from fuel-cell systems using a high-gain power dc-dc converter: Analysis, design, and implementation

Cited by 16 publications

References 36 publications

Future pem fuel cell system renewable energy systems based on hydrogen equipment for microgrid networks

Future pem fuel cell system renewable energy systems based on hydrogen equipment for microgrid networks

A robust energy processing method for fuel cell systems supplying a time‐varying uncertain load

A PI + Sliding-Mode Controller Based on the Discontinuous Conduction Mode for an Unidirectional Buck–Boost Converter with Electric Vehicle Applications

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