A Power Control Scheme to Improve the Performance of a Fuel Cell Hybrid Power

Song, Yujin; Han, Soo-Bin; Li, Xiangjun; Park, S.I.; Jeong, Hakgeun; Jung, Bong-Man

doi:10.1109/pesc.2007.4342174

Cited by 17 publications

(7 citation statements)

References 7 publications

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“…This means that there will not be a 2ω component in the input current i in . From (22), amplitude B is derived as…”

Section: V Inmentioning

confidence: 99%

“…On the other hand, it is also possible to mitigate the current ripple through the use of active control methods, e.g., by using a dual-loop control [1] or by using a moving-average filter [22]. These methods do not incur extra component cost and can reduce the low-frequency ripple during steady state, thereby allowing the reduction of the storage capacitance.…”

Section: Introductionmentioning

confidence: 99%

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Mitigation of Low-Frequency Current Ripple in Fuel-Cell Inverter Systems Through Waveform Control

Zhu

Tan

Chen

et al. 2013

IEEE Trans. Power Electron.

168

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Fuel-cell power systems comprising single-phase dc/ac inverters draw low-frequency ac ripple currents at twice the output frequency from the fuel cell. Such a 100/120 Hz ripple current may create instability in the fuel-cell system, lower its efficiency, and shorten the lifetime of a fuel cell stack. This paper presents a waveform control method that can mitigate such a lowfrequency ripple current being drawn from the fuel cell while the fuel-cell system delivers ac power to the load through a differential inverter. This is possible because with the proposed solution, the pulsation component (cause of ac ripple current) of the output ac power will be supplied mainly by the two output capacitors of the differential inverter while the average dc output power is supplied by the fuel cell. Theoretical analysis, simulation, and experimental results are provided to explain the operation and showcase the performance of the approach. Results validate that the proposed solution can achieve significant mitigation of the current ripple as well as high-quality output voltage without extra hardware. Application of the solution is targeted at systems where current ripple mitigation is required, such as for the purpose of eliminating electrolytic capacitor in photovoltaic and LED systems.

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“…This means that there will not be a 2ω component in the input current i in . From (22), amplitude B is derived as…”

Section: V Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mitigation of Low-Frequency Current Ripple in Fuel-Cell Inverter Systems Through Waveform Control

Zhu

Tan

Chen

et al. 2013

IEEE Trans. Power Electron.

168

View full text Add to dashboard Cite

show abstract

“…I FC is sufficiently small (at 0.5 mA) to avoid stressing the FC's membrane electrode assembly beyond its rating (for overload protection) and high enough to reduce the percentage of fuel lost through the membrane as leakage (for load matching) [24][25][26]. I LI is higher at 2.5 mA to supply the heavier loads that the small FC cannot.…”

Section: Power Mixermentioning

confidence: 99%

Single-inductor fuel cell-Li ion charger-supply IC with nested hysteretic control

Kim

Rincón-Mora

2011

Analog Integr Circ Sig Process

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Microsystems must conform to microscale dimensions, store sufficient energy to last extended periods, and supply enough power to sustain, among others, wireless and sensor functions. Because batteries source moderate power with low energy densities, miniaturized devices benefit from deriving energy from fuel cells (FCs) and power from Li ions, rather than relying on one source and over-sizing it to offset its deficiency. This article presents a single-inductor, dual-input, dual-output (SIDIDO) charger-supply 0.5-lm CMOS IC with a nested hystereticcontrol scheme that draws energy from a FC and conditions power to charge a Li ion and supply a 1-V, 1-mA load. The IC dynamically adjusts to the load, charging the Li ion with excess power from the FC during light loads and supplying power from both the FC and Li ion otherwise. The fabricated prototype regulated its output to 1 V within 2.5% and responded to rising and falling 0.1-1-mA load dumps within 30 ls and 50 mV. The efficiency peaked at 32% because the load was low and the converter operated in continuous (rather than in discontinuous) conduction and sensed its inductor current via lossy sense resistors (instead of sense FETs) to manage risk and validate functionality.Keywords Single inductor Á Hybrid source Á Switching converter IC Á Fuel cell Á Hysteretic control 1 Battery-powered microsystems Advances in silicon and MEMS technologies are paving the way for smart, non-intrusive, and battery-powered microscale devices, such as wireless microsensors, whose impact on military, space, industrial, and biomedical applications [1-3] is to increase functionality (e.g., monitoring), improve performance (with dynamic control), and lower energy use (with in situ intelligence). Powering these systems under such space constraints is challenging because batteries do not supply sufficient energy to last the lifetime demanded of them and fuel cells (FCs), atomic batteries, and harvesters do not source enough power to enable critical functions like telemetry and sensor-interface blocks. What is more, these devices must mode-hop between idle and other states to conserve energy, requiring their supplies to adjust and source diverse load levels [4, 5]. Hybrid sourcesPower and energy densities do not correlate in microscale sources. Nuclear batteries and FCs, for example, are energy dense but supply little power when compared to other equally sized sources [6][7][8]. In other words, these technologies outlast others when they supply little power but quickly outlive their usefulness when loaded beyond their capacities. In contrast, Li-Ion batteries store less energy but produce higher power, that is, source higher energy when supplying higher power under equivalent space constraints. However, over-sizing the battery (or FC) to meet energy (or power) demands is not functionally efficient in microscale applications. As a result, mixing complementary technologies like FCs and Li ions offers a considerable advantage in size [9], which is why research in this area (as in portable [10] a...

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“…However no storage is used, and then only time result simulations are presented and no robustness evaluation is performed. In parallel, control strategies often include FC energy management in order to optimize the efficiency of the FC [10] [3]. The main objective of this paper is then to show that robustness allows to simplify and optimize the design of control loops for a hybrid system, and then come back over the design and improve the efficiency of the system.…”

Section: Introductionmentioning

confidence: 99%

A robust multivariable approach for hybrid fuel cell supercapacitor power generation system

Hernández

Riu

Sename

et al. 2011

Eur. Phys. J. Appl. Phys.

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Abstract. In this article, a H∞ control methodology is proposed for a hybrid power generation system composed by a 500 W PEM fuel cell and a 58F supercapacitor. The control strategy consists in synthetizing a multivariable PI controller with H∞ performance in order to manage powers between two electrochemical sources. The controller is then designed through an optimization procedure based on solving some Linear Matrix Inequalities (LMI). The control performance in time and frequency domains are then analyzed and compared with classical controllers. Results show the efficiency of the proposed methodology in order to reduce time spent for design.

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A Power Control Scheme to Improve the Performance of a Fuel Cell Hybrid Power

Cited by 17 publications

References 7 publications

Mitigation of Low-Frequency Current Ripple in Fuel-Cell Inverter Systems Through Waveform Control

Mitigation of Low-Frequency Current Ripple in Fuel-Cell Inverter Systems Through Waveform Control

Single-inductor fuel cell-Li ion charger-supply IC with nested hysteretic control

A robust multivariable approach for hybrid fuel cell supercapacitor power generation system

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