Optimal shifting of Photovoltaic and load fluctuations from fuel cell and electrolyzer to lead acid battery in a Photovoltaic/hydrogen standalone power system for improved performance and life time

Tesfahunegn, S. G.; Ulleberg, Øystein; Vie, Preben J. S.; Undeland, Tore

doi:10.1016/j.jpowsour.2011.06.037

Cited by 56 publications

(26 citation statements)

References 7 publications

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“…This variability may be reduced by increasing the filtering on the output of the DC/DC converter. Variability of the electrolyser power input can result in reduced performance [2].…”

Section: Discussionmentioning

confidence: 99%

“…These include systems operating with battery storage [1][2][3]. Studies considering hydrogen generation have focused on the supervisory control of the system [4], or the control in conjunction with a battery system [5].…”

Section: Introductionmentioning

confidence: 99%

“…These include those using hydrogen as a storage mechanism for a standalone system and incorporating an electrolyser, hydrogen storage and a fuel cell [6], with short term storage such as batteries also included [5,7,8]. Standalone systems using other renewable sources such as PV have also been considered [2]. Other papers have considered systems dedicated solely to renewablehydrogen production [4,9,10].…”

Section: Introductionmentioning

confidence: 99%

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Control and simulation of a stand-alone wind-hydrogen generation system

Carr¹,

Zhang²,

Thanapalan³

et al. 2013

REPQJ

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Abstract. The potential to produce hydrogen from renewable resources is of considerable interest due to fears over man-made climate change and resource depletion. Hydrogen produced from renewable resources can be used to generate electricity through a fuel cell, or for other uses in a hydrogen economy. There are a number of potential system configurations for hydrogen production from electrolysis including grid connected and standalone. In remote locations, stand-alone configurations are of interest, and may prove more economically viable than grid connected systems. In this paper a standalone wind -hydrogen generation system is designed and proposed to take advantage of an electrolyser capable of operating at very low power levels. A dynamic model of the system is presented, along with a maximum power point (MPPT) control algorithm of the system. The potential yield of such a wind-hydrogen stand-alone system located at the University of Glamorgan's Hydrogen Centre is investigated using wind speed data collected at the site and the performance of the system under variable wind conditions determined.

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“…This variability may be reduced by increasing the filtering on the output of the DC/DC converter. Variability of the electrolyser power input can result in reduced performance [2].…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Control and simulation of a stand-alone wind-hydrogen generation system

Carr¹,

Zhang²,

Thanapalan³

et al. 2013

REPQJ

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“…Previous studies of hybrid hydrogen-battery storage systems have shown that heavy battery use can lead to more efficient systems with reduced PV/wind requirements, but with deep discharges and/or long periods at low SOC which adversely affect battery life [17,19,25]. Others have shown that batteries can be protected through reduced usage by placing a heavy reliance on hydrogen, but with adverse impacts on system efficiency and renewable power capacity [20,26,27]. Here we show that a compromise can be reached, with batteries improving system efficiency and reducing PV/wind capacity requirements through regular daily cycling, while the hydrogen component serves to maintain battery SOC within narrow limits and so extend battery life.…”

Section: Introductionmentioning

confidence: 99%

Hybrid hydrogen-battery systems for renewable off-grid telecom power

Scamman

Newborough

Bustamante

2015

International Journal of Hydrogen Energy

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ElectrolysisHybrid hydrogen-battery energy storage Renewable storage a b s t r a c t Off-grid hybrid systems, based on the integration of hydrogen technologies (electrolysers, hydrogen stores and fuel cells) with battery and wind/solar power technologies, are proposed for satisfying the continuous power demands of telecom remote base stations. A model was developed to investigate the preferred role for electrolytic hydrogen within a hybrid system; the analysis focused on powering a 1 kW telecom load in three locations of distinct wind and solar resource availability. When compared with otherwise equivalent off-grid renewable energy systems employing only battery energy storage, the results show that the integration of a 1 kW fuel cell and a 1.6 kW electrolyser at each location is sufficient, in combination with a hydrogen storage capacity of between 13 and 31 kg, to reduce the required battery capacity by 54e77%, to increase the minimum state-of-charge from 37 to 55% to >81.5% year-round despite considerable seasonal variation in supply, and to reduce the amount of wasted renewable power by 55e79%. For the growing telecom sector, the proposed hybrid system provides a 'green' solution, which is preferable to shipping hydrogen or diesel to remote base stations.

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“…The PV power above the scheduled grid power curve is used to produce hydrogen using an electrolyzer and the power deficit is produced by a fuel cell. Tesfahunegn et al [31,32] have exposed simulation studies based on realistic irradiance data conducted in SIMULINK/SIMPOWER. They propose a smoothing method for sub-hourly dispatchable power to be fed to the grid.…”

Section: Introductionmentioning

confidence: 99%