Hydropower and Power-to-gas Storage Options: The Brazilian Energy System Case

Larissa De Souza Noel Simas Barbosa, Javier Farfan Orozco, Dmitrii Bogdanov, Pasi Vainikka, Christian Breyer (Corresponding Author)

    Research output: Contribution to journalArticleScientificpeer-review

    23 Citations (Scopus)

    Abstract

    In this study, a 100% renewable energy (RE) system for Brazil in 2030 was simulated using an hourly resolution model. The optimal sets of RE technologies, mix of capacities, operation modes and least cost energy supply were calculated and the role of storage technologies was analysed. The RE generated was not only able to fulfil the electricity demand of the power sector but also able to cover the 25% increase in total electricity demand due to water desalination and synthesis of natural gas for industrial use. The results for the power sector show that the total installed capacity is formed of 165 GW of solar photovoltaics (PV), 85 GW of hydro dams, 12 GW of hydro run-of-river, 8 GW of biogas, 12 GW of biomass and 8 GW of wind power. For solar PV and wind electricity storage, 243 GWhel of battery capacity is needed. According to the simulations the existing hydro dams will function similarly to batteries, being an essential electricity storage. 1 GWh of pumped hydro storage, 23 GWh of adiabatic compressed air storage and 1 GWh of heat storage are used as well. The small storage capacities can be explained by a high availability of RE sources with low seasonal variability and an existing electricity sector mainly based on hydro dams. Therefore, only 0.05 GW of PtG technologies are needed for seasonal storage in the electricity sector. When water desalination and industrial gas sectors' electricity demand are integrated to the power sector, a reduction of 11% in both total cost and electric energy generation was achieved. The total system levelized cost of electricity decreased from 61 €/MWh to 53 €/MWh for the sector integration.

    Original languageEnglish
    Pages (from-to)89-107
    Number of pages19
    JournalEnergy Procedia
    Volume99
    DOIs
    Publication statusPublished - 1 Jan 2016
    MoE publication typeA1 Journal article-refereed
    Event10th International Renewable Energy Storage Conference, IRES 2016 - Dusseldorf, Germany
    Duration: 15 Mar 201617 Mar 2016

    Keywords

    • 100% renewable energy
    • Brazil
    • economics
    • grid integration
    • hydro dams
    • power-to-gas
    • solar PV

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