Power to gas: addressing renewable curtailment by converting to hydrogen

Abstract

Renewable energy is the key to meeting increasing electricity demand and the decarburization targets in the generation mix. However, due to constrained power network capacity, a large volume of renewable generation is curtailed particularly from wind power, which is a huge waste of resources. There are typically three approaches to addressing excessive renewable: direct curtailment, the reinforcement of networks to expand transfer capacity, and the conversion of excessive renewable into other energy types, such as hydrogen, to transport. The costs and benefits of the three approaches could vary significantly across location, time, and penetration of renewable energy. This paper conducts a cost-benefit analysis and comparison of the three techniques to address wind curtailment. It uses a reduced 16-busbar UK transmission network to analyze the performance of the three approaches. The UK 2020 generation mix is used to quantify the saved renewable energy and incurred costs. The payback time and net present value of the two investment techniques are compared. From demonstration, it is reasonable to conclude that converting excessive wind power into hydrogen to transport is an environmentally friendly and cost-effective way to address wind curtailment.

Keywords

blending hydrogen / cost-benefit analysis / electrolysis / wind curtailment

References

[1] Jennifer Rogers S F, Porter K. Examples of wind energy curtailment practices. National Renewable Energy Laboratory, 2010

[2] National Grid. Winter Outlook 2014/15. National Grid, 2014

[3] Lew D, Bird L, Milligan M, Wind and solar curtailment. The National Renewable Energy Laboratory (NREL), 2013

[4] Luo X, Wang J, Dooner M, Clarke J. Overview of current development in electrical energy storage technologies and the application potential in power system operation. Applied Energy, 2015, 137(C): 511–536

[5] Wang H L, Redfern M A. The advantages and disadvantages of using HVDC to interconnect AC networks. In: 45th International Universities Power Engineering Conference. Cardiff, Wales, UK, 2010

[6] Lori Bird J C, Wang X. Wind and solar energy curtailment: experience and practices in the United States. 2017–10, http://www.nrel.gov/docs/fy14osti/60983.pdf

[7] GOV.UK. Wind imbalance in UK Technical solutions for mitigation. 2017–12, https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/253178/Technical_mitigation_of_imbalance_risk__analysis_by_Mott_MacDonald___Presentation_at_April_workshop_.pdf

[8] Zhang N, Lu X, McElroy M B, Reducing curtailment of wind electricity in China by employing electric boilers for heat and pumped hydro for energy storage. Applied Energy, 2016, 184: 987–994

[9] Waite M, Modi V. Modeling wind power curtailment with increased capacity in a regional electricity grid supplying a dense urban demand. Applied Energy, 2016, 183: 299–317

[10] Ursua A, Gandia L M, Sanchis P. Hydrogen production from water electrolysis: current status and future trends. Proceedings of the IEEE, 2012, 100(2): 410–426

[11] Rozendal R A, Hamelers H V, Euverink G J, Metz S J, Buisman C J. Principle and perspectives of hydrogen production through biocatalyzed electrolysis. International Journal of Hydrogen Energy, 2006, 31(12): 1632–1640

[12] Kavadias K, Apostolou D, Kaldellis J. Modelling and optimisation of a hydrogen-based energy storage system in an autonomous electrical network. Applied Energy, 2017, 227: 574–586

[13] Cai W, Zhang Z, Ren G, Quorum sensing alters the microbial community of electrode-respiring bacteria and hydrogen scavengers toward improving hydrogen yield in microbial electrolysis cells. Applied Energy, 2016, 183: 1133–1141

[14] Ehteshami S M M, Vignesh S, Rasheed R K A, Chan S H. Numerical investigations on ethanol electrolysis for production of pure hydrogen from renewable sources. Applied Energy, 2016, 170: 388–393

[15] Nursebo S, Chen P, Carlson O, Tjernberg L B. Optimizing wind power hosting capacity of distribution systems using cost benefit analysis. IEEE Transactions on Power Delivery, 2014, 29(3): 1436–1445

[16] Hu Z, Li F. Cost-benefit analyses of active distribution network management, part II: investment reduction analysis. IEEE Transactions on Smart Grid, 2012, 3(3): 1075–1081

[17] Parissis O S, Zoulias E, Stamatakis E, Integration of wind and hydrogen technologies in the power system of Corvo island, Azores: a cost-benefit analysis. International Journal of Hydrogen Energy, 2011, 36(13): 8143–8151

[18] Schouten J A, Michels J P J, Janssen R. Mixtures of hydrogen and natural gas: thermodynamic and transportation properties. 2017–10, www.waterstof.org/20030725EHECP2-49.pdf

[19] Sarrias-Mena R, Fernández-Ramírez L M, García-Vázquez C A, Jurado F. Electrolyzer models for hydrogen production from wind energy systems. International Journal of Hydrogen Energy, 2015, 40(7): 2927–2938

[20] Windpower Program. Wind turbine power output variation with steady wind speed. 2017–10, http://www.wind-power-program.com/turbine_characteristics.htm

[21] Manyonge A W, Ochieng R M, Onyango F N, Shichikha J M. Mathematical modelling of wind turbine in a wind energy conversion system: power coefficient analysis. Applied Mathematical Sciences, 2012, 6(6): 4527–4536

[22] Chaudry M, Jenkins N, Qadrdan M, Wu J. Combined gas and electricity network expansion planning. Applied Energy, 2014, 113(6): 1171–1187

[23] Investopedia. Net present value—NPV. 2017–11, http://www.investopedia.com/terms/n/npv.asp

[24] Qadrdan M. Modelling of an integrated gas and electricity network with significant wind capacity. Dissertation for the Doctoral Degree. Welsh: Cardiff University, 2012

[25] MSW.Weather Stations. 2017–10, http://magicseaweed.com/UK-Ireland-Wave-Buoys/1/?zoom=10&ll=51.539867177045686, 0.8548011962890323&filters=wind&type=station

[26] Npower. Wind turbine power calculations. 2017–10, http://www.raeng.org.uk/publications/other/23-wind-turbine

[27] KAPSOM. Water electrolysis hydrogen generator. 2017–11, http://www.kapsom.com/portfolio-items/water-electrolysis-hydrogen-generator/

[28] NERA Economic Consulting. Energy supply margins: commentary on Ofgem’s SMI. 2017–09, http://www.energy-uk.org.uk/publication.html?task=file.download&id=5008

[29] ECUITY. A vision for the UK hydrogen economy. 2018–07, https://www.ecuity.com/wp-content/uploads/2015/04/johnson-matthey-20-04.pdf

[30] Ogden J M. Cost and performance sensitivity studies for solar photovoltaic/ electrolytic hydrogen systems. Solar Cells, 1991, 30(1–4): 515–523

[31] GOV.UK. Social impact bonds: discount rates and net present value. 2017–10, https://data.gov.uk/sib_knowledge_box/discount-rates-and-net-present-value

Acknowledgment

The work is in partially supported by the EPSRC project EP/M000141/1 and Chinese Scholarship Council (CSC).

RIGHTS & PERMISSIONS

2018 Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature