Power Management Unit With Its Control for a Three-Phase Fuel Cell Power System Without Large Electrolytic Capacitors

Li, Xiao; Zhang, Wenping; Li, Haijin; Xie, Ruiqing; Chen, Min; Shen, Ge; Xu, Dehong

doi:10.1109/tpel.2011.2162533

Cited by 56 publications

(29 citation statements)

References 25 publications

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“…Fuel cell generation systems usually operate in the stand-alone mode or the grid-connected mode [4]. Fig.2 shows the schematic of a two stage three-phase fuel cell power conditioning system (FC-PCS).…”

Section: Generation and Propagation Mechanism Of Low Frequency Cumentioning

confidence: 99%

“…The dc-ac inverter can be connected to a three-phase load (stand-alone mode) or power grid with ac connectors (grid-connected mode). When the PEMFC generation system operates in stand-alone mode, the unbalanced three-phase load will produce pulsating power that is double the output frequency at the inverter output, causing the dc-link to generate low frequency ripple [4]. This inversely penetrates to the fuel cell through the front-end dc-dc converter.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low Frequency Current Ripple Mitigation of Two Stage Three-Phase PEMFC Generation Systems

Deng¹,

Li²,

Liu³

et al. 2016

Journal of Power Electronics

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This paper presents a two stage three-phase proton exchange membrane fuel cell (PEMFC) generation system. When the system is connected to a three-phase load, it is very sensitive to the characteristics and type of the load. Especially unbalanced three-phase loads, which result in a pulsating power that is twice the output frequency at the inverter output, and cause the dc-link to generate low frequency ripples. This penetrates to the fuel cell side through the front-end dc-dc converter, which makes the fuel cell work in an unsafe condition and degrades its lifespan. In this paper, the generation and propagation mechanism of low frequency ripple is analyzed and its impact on fuel cells is presented based on the PEMFC output characteristics model. Then a novel method to evaluate low frequency current ripple control capability is investigated. Moreover, a control scheme with bandpass filter inserted into the current feed-forward path, and ripple duty ratio compensation based on current mode control with notch filter is also proposed to achieve low frequency ripple suppression and dynamic characteristics improvement during load transients. Finally, different control methods are verified and compared by simulation and experimental results.

show abstract

Section: Generation and Propagation Mechanism Of Low Frequency Cumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low Frequency Current Ripple Mitigation of Two Stage Three-Phase PEMFC Generation Systems

Deng¹,

Li²,

Liu³

et al. 2016

Journal of Power Electronics

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show abstract

“…According to (11), the SHC suppression ratio constraint curves under different k values are depicted with solid lines in Fig. 5.…”

Section: A Derivation Of Satisfactory Region Of R I and F Cmentioning

confidence: 99%

A Bandpass Filter Incorporated Into the Inductor Current Feedback Path for Improving Dynamic Performance of the Front-End DC–DC Converter in Two-Stage Inverter

Zhang

Ren

Ruan

2014

IEEE Trans. Ind. Electron.

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The instantaneous output power of a two-stage single-phase inverter pulsates at twice the output voltage frequency, generating second harmonic current (SHC) in the frontend dc-dc converter. To reduce the SHC, this paper proposes a virtual impedance based control strategy. For the case of adopting a resistor as the virtual impedance, a closed-loop parameter design method is presented, revealing that the voltage loop crossover frequency is relatively low under such circumstance. To overcome this problem, a control strategy incorporating a bandpass filter (BPF) into the inductor current feedback path is put forward and a damping resistor is further added into the BPF for the purpose of improving the system stability margin. Hence, the proposed control scheme can not only reduce the SHC significantly, but also improve the dynamic performance of the front-end dc-dc converter effectively while guaranteeing the stability of the converter. Finally, a 1-kVA prototype is built and tested in the laboratory, and the experimental results are presented to verify the effectiveness of the proposed control strategy.Index Terms-Bandpass filter (BPF), second harmonic current (SHC), two-stage inverter, virtual impedance.

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“…One is to increase the intermediate dc bus capacitor [7] or to equip a bidirectional converter in parallel with the intermediate dc bus [8][9][10][11][12]. However, as the capacitance needed is quite large, electrolytic capacitor will always have to be applied, which may reduce the power density of the converter.…”

Section: Introductionmentioning

confidence: 99%

Control strategy for the front-end DC-DC converter to reduce the second-order harmonic current in the two-stage inverter

Zhang

Ren

Ruan

et al. 2013

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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The instantaneous output power of the two-stage single-phase inverter pulsates at twice the output voltage frequency, generating second-order harmonic current (SHC) in the front-end DC-DC converter. To reduce the SHC, this paper proposes a control strategy based on the virtual impedance. For the case that adopting a resistor as the virtual impedance, a closed-loop parameter design method is presented, indicating that this instance is not beneficial to increasing the voltage loop crossover frequency (VLCF). To overcome this problem, a control strategy with inner inductor current feedback through the band-pass filter(BPF) is put forward and a damping resistor is added into the BPF in order to improve the stability margin. The proposed control strategy can not only reduce the SHC significantly, but also improve the dynamic performance of the front-end DC/DC converter effectively while guarantee the converter working in stability. Finally, an 1kVA prototype is built and tested in the lab. The experimental results are given to verify the effectiveness of the proposed control strategy.

show abstract

Power Management Unit With Its Control for a Three-Phase Fuel Cell Power System Without Large Electrolytic Capacitors

Cited by 56 publications

References 25 publications

Low Frequency Current Ripple Mitigation of Two Stage Three-Phase PEMFC Generation Systems

Low Frequency Current Ripple Mitigation of Two Stage Three-Phase PEMFC Generation Systems

A Bandpass Filter Incorporated Into the Inductor Current Feedback Path for Improving Dynamic Performance of the Front-End DC–DC Converter in Two-Stage Inverter

Control strategy for the front-end DC-DC converter to reduce the second-order harmonic current in the two-stage inverter

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