Comprehensive influences measurement and analysis of power converter low frequency current ripple on PEM fuel cell

Zhan, Yuedong; Guo, Youguang; Zhu, Jun; Liang, Bo; Yang, Biao

doi:10.1016/j.ijhydene.2019.09.231

Cited by 22 publications

(11 citation statements)

References 23 publications

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“…The practical application of the multi-sine EIS technique is feasible, but the multi-sine technique requires a larger total amplitude than the single-sine technique. This may be a problem practically, as such an signal has similarities with ripple current originating in the power converter, which has been shown to lead to some degradation (Wahdame et al, 2008;Gerard et al, 2010;Zhan et al, 2019). Further studies are therefore necessary to verify that both techniques do not contribute significantly to degradation when run in a continual manner.…”

Section: Practical Application Of the Technique To Fuel Cell Stacksmentioning

confidence: 99%

Multi-Sine EIS for Early Detection of PEMFC Failure Modes

et al. 2022

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Electrochemical impedance spectroscopy (EIS) is a powerful technique that can be used to detect small changes in electrochemical systems and subsequently identify the source of the change. While promising, analysis is often non-intuitive and time-consuming, where collection times of a single EIS spectrum can reach several minutes. To circumvent the long collection times associated with traditional EIS measurements, a multi-sine EIS technique was proposed in which the simultaneous application of many frequencies can reduce the acquisition time to less than a minute. This shortened acquisition time opens the possibility to use multi-sine EIS as a real-time diagnostic tool for monitoring the state-of-health of commercial fuel cell systems. In this work, a single-cell proton exchange membrane fuel cell (PEMFC) was characterised using multi-sine EIS, by establishing steady-state impedance response under baseline conditions before systematically changing operating conditions and monitoring the dynamic changes of the impedance response. Our initial results demonstrate that full multi-sine EIS spectra, encompassing a frequency range from 50 kHz to 0.5 Hz, can be collected and analysed using simple equivalent circuit models in 50 s. It is shown that this timeframe is sufficiently short to capture the dynamic response of the fuel cell in response to changing operating conditions, thereby validating the use of multi-sine EIS as a diagnostic technique for in-situ monitoring and fault detection during fuel cell operation.

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Section: Practical Application Of the Technique To Fuel Cell Stacksmentioning

confidence: 99%

Multi-Sine EIS for Early Detection of PEMFC Failure Modes

et al. 2022

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“…By using a commercial power converter the output voltage is affected both by low and high-frequency ripple; it influences the current that suffers from the same distortion. Many works have been reported in the literature to investigate the effects of low and high-frequency current ripples on PEM FC stack [49][50][51][52], and more recently on alkaline EL [53,54]. In these relevant works, it has been demonstrated that low and high-frequency current ripple may affect the lifetime and performance of FC and EL during their operation.…”

Section: Dynamic Operation and Analysismentioning

confidence: 99%

Proton Exchange Membrane Electrolyzer Emulator for Power Electronics Testing Applications

et al. 2021

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This article aims to develop a proton exchange membrane (PEM) electrolyzer emulator. This emulator is realized through an equivalent electrical scheme. It allows taking into consideration the dynamic operation of PEM electrolyzers, which is generally neglected in the literature. PEM electrolyzer dynamics are reproduced by the use of supercapacitors, due to the high value of the equivalent double-layer capacitance value. Steady-state and dynamics operations are investigated in this work. The design criteria are addressed. The PEM electrolyzer emulator is validated by using a 400-W commercial PEM electrolyzer. This emulator is conceived to test new DC-DC converters to supply the PEM ELs and their control as well, avoiding the risk to damage a real electrolyzer for experiment purposes. The proposed approach is valid both for a single cell and for the whole stack emulation.

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“…12 Assume that there are no power losses in the UPS system. As the output voltage of 13 PEMFC could be considered as current control voltage source, the input current of an Consequently, the LFCR injected into the FC stack could bring about adverse effect on the voltage and current of FC, such as producing more heat, increasing the fuel consumption, reducing the output power and efficiency of FC, and impacting its availability [21].…”

Section: Equivalent Circuit Model Of Pemfc Stackmentioning

confidence: 99%