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Article

Capacity Value from Wind and Solar Sources in Systems with Variable Dispatchable Capacity—An Application in the Brazilian Hydrothermal System

1
Instituto de Energia e Ambiente, Universidade de São Paulo, São Paulo CEP 05508-010, Brazil
2
Centro de Análise, Planejamento e Desenvolvimento de Recursos Energéticos (CPLEN), Universidade de São Paulo, São Paulo CEP 05508-010, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Adrian Ilinca
Energies 2021, 14(11), 3196; https://doi.org/10.3390/en14113196
Received: 18 April 2021 / Revised: 19 May 2021 / Accepted: 21 May 2021 / Published: 30 May 2021
(This article belongs to the Section A: Sustainable Energy)
The most robust methods to determine the capacity contribution from intermittent sources combine load curve, variable generation profile, and dispatchable generators’ data to calculate any new inserted variable source’s capacity value in the power system. However, these methods invariably adopt the premise that the system’s dispatchable generators’ capacity is constant. That is an unacceptable limitation when the energy mix has a large share of hydroelectric sources. Hydroelectric plants are dispatchable sources with variable maximum power output over time, varying mainly according to the reservoirs’ level. This article develops a method that makes it possible to calculate the capacity value from renewable resources when the dispatchable generation units of an electric system have variable capacity. The authors apply the method to calculate the capacity value from solar and wind sources in Brazil as an exercise. By abandoning the hypothesis of constant dispatchable capacity, the developed approach is in principle extensible for other energy-limited resources, such as batteries and concentrating solar power (CSP). This can be a strategy to incorporate energy-limited capacity sources into the planning and operation models as reliable capacity sources. View Full-Text
Keywords: capacity value; capacity credit; intermittent generation; capacity contribution; hydropower; variable dispatchable capacity; effective load carrying capability (ELCC); loss of load probability (LOLP); loss of load expectation (LOLE) capacity value; capacity credit; intermittent generation; capacity contribution; hydropower; variable dispatchable capacity; effective load carrying capability (ELCC); loss of load probability (LOLP); loss of load expectation (LOLE)
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MDPI and ACS Style

Amado, N.B.; Pelegia, E.D.B.; Sauer, I.L. Capacity Value from Wind and Solar Sources in Systems with Variable Dispatchable Capacity—An Application in the Brazilian Hydrothermal System. Energies 2021, 14, 3196. https://doi.org/10.3390/en14113196

AMA Style

Amado NB, Pelegia EDB, Sauer IL. Capacity Value from Wind and Solar Sources in Systems with Variable Dispatchable Capacity—An Application in the Brazilian Hydrothermal System. Energies. 2021; 14(11):3196. https://doi.org/10.3390/en14113196

Chicago/Turabian Style

Amado, Nilton Bispo, Erick Del Bianco Pelegia, and Ildo Luís Sauer. 2021. "Capacity Value from Wind and Solar Sources in Systems with Variable Dispatchable Capacity—An Application in the Brazilian Hydrothermal System" Energies 14, no. 11: 3196. https://doi.org/10.3390/en14113196

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