A stochastic model for a macroscale hybrid renewable energy system

Date
2016
Authors
Kocaman, A. S.
Abad, C.
Troy, T. J.
Huh, W. T.
Modi, V.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Renewable and Sustainable Energy Reviews
Print ISSN
1364-0321
Electronic ISSN
1879-0690
Publisher
Elsevier
Volume
54
Issue
Pages
688 - 703
Language
English
Type
Article
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Volume Title
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Abstract

The current supply for electricity generation mostly relies on fossil fuels, which are finite and pose a great threat to the environment. Therefore, energy models that involve clean and renewable energy sources are necessary to ease the concerns about the electricity generation needed to meet the projected demand. Here, we mathematically model a hybrid energy generation and allocation system where the intermittent solar generation is supported by conventional hydropower stations and diesel generation and time variability of the sources are balanced using the water stored in the reservoirs. We develop a two-stage stochastic model to capture the effect of streamflows which present significant inter-annual variability and uncertainty. Using sample case studies from India, we determine the required hydropower generation capacity and storage along with the minimal diesel usage to support 1 GWpeak solar power generation. We compare isolated systems with the connected systems (through inter-regional transmission) to see the effects of geographic diversity on the infrastructure sizing and quantify the benefits of resource-sharing. We develop the optimal sizing relationship between solar and hydropower generation capacities given realistic cost parameters and real data and examine how this relationship would differ as the contribution of diesel is reduced. We also show that if the output of the solar power stations can be controlled (i.e. spill is allowed in our setting), operating them below their maximum energy generation levels may reduce the unit cost of the system.

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Keywords
Hydropower, India, Infrastructure sizing, Resource sharing, Solar energy, Transmission network, Two-stage stochastic program, Electric power transmission networks
Citation
Published Version (Please cite this version)