stand-alone renewable energy system based on hydrogen production

stand-alone renewable energy system based on hydrogen production stand-alone renewable energy system based on hydrogen production

26.12.2013 Views

5000 5000 Battery Charging / Discharging Power Load Battery Charging / Discharging Power (W) 3000 1000 -1000 -3000 4000 3000 2000 1000 Load (W) -5000 0 0 2 3 4 6 7 8 9 12 13 14 15 16 17 18 19 21 23 24 26 28 Time (day of operation) (b) Figure 6: Battery charging /discharging and load power 6000 Electrolyser Input Power H2 Flow Rate 90 Power (W) 4000 2000 60 30 H2 Flow Rate (Lit/min) 0 0 0 2 3 4 6 7 8 9 12 13 14 15 16 17 18 19 21 23 24 26 28 Time (day of operation) Figure 7: Electrolyser input power and H 2 flow rate - 8 -

6. CONCLUSIONS The successful long-term autonomous operation and performance of a ong>standong>-ong>aloneong> RE ong>systemong> ong>basedong> on hydrogen production has been demonstrated using a control ong>systemong> and power conditioning devices. The components of the RE ong>systemong>, which have substantially different voltage-current characteristics, were integrated using power conditioning devices on the DC bus for effective operation. The ong>systemong> was tested successfully for autonomous operation. The sensors collected real-time data and utilized this information in the control algorithm for effective ong>energyong> management in the ong>systemong>. The buffer ong>energyong> storage provided by batteries managed the load transients, electrolyser ripples and the intermittent power peaks from the RE sources efficiently. The developed control ong>systemong> and power conditioning devices were tested for different load profiles and for various intermittent input power patterns, which were also generated through the programmable DC power source. We also used a programmable power source as input to our RE ong>systemong>, which can simulate any type of intermittent power output by using the wind or solar ong>energyong> profile of any region. The different load profiles were generated using a programmable load to test the ong>systemong> operation and performance. The ong>standong>-ong>aloneong> RE ong>systemong> developed at the HRI can thus be utilized to test the operation and performance of any ong>standong>-ong>aloneong> RE ong>systemong> ong>basedong> on electrolytic hydrogen. Acknowledgement: This work was supported in part by the Ministère des ressources Naturelles du Québec, Natural Resources Canada, Natural Sciences and Engineering Research Council of Canada, Canada Foundation of Innovation, the AUTO21 Centre of Excellence. We would like to thank Ballard Power for the fuel cell ong>systemong> and Stuart Energy Inc. for the electrolyser. 7. CONTACT INFORMATION Institut de recherche sur l’hydrogène / Hydrogen Research Institute Tapan K. Bose, director Université du Québec à Trois-Rivières C.P. 500 Trois-Rivières, Québec, G9A 5H7, Canada Telephone: 001 819 376-5139 Fax: 001 819 376-5164 E-mail: Tapan_Bose@uqtr.ca - 9 -

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Figure 6: Battery charging /discharging and load power<br />

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Electrolyser Input Power<br />

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Figure 7: Electrolyser input power and H 2 flow rate<br />

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