Analysis of operating reserve demand curves in power system operations in the presence of variable generation

Krad, Ibrahim; Gao, David Wenzhong; Ela, Erik; Ibanez, Eduardo; Wu, Hongyu

doi:10.1049/iet-rpg.2016.0225

Title: Analysis of operating reserve demand curves in power system operations in the presence of variable generation

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Abstract

The electric power industry landscape is continually evolving. As emerging technologies such as wind and solar generating systems become more cost effective, traditional power system operating strategies will need to be re-evaluated. The presence of wind and solar generation (commonly referred to as variable generation or VG) can increase variability and uncertainty in the net-load profile. One mechanism to mitigate this issue is to schedule and dispatch additional operating reserves. These operating reserves aim to ensure that there is enough capacity online in the system to account for the increased variability and uncertainty occurring at finer temporal resolutions. A new operating reserve strategy, referred to as flexibility reserve, has been introduced in some regions. A similar implementation is explored in this study, and its implications on power system operations are analyzed. Results show that flexibility reserve products can improve economic metrics, particularly in significantly reducing the number of scarcity pricing events, with minimal impacts on reliability metrics and production costs. Furthermore, the production costs increased due to increased VG curtailment - i.e. including the flexible ramping product in the commitment of excess thermal capacity that needed to remain online at the expense of VG output.

Authors:

Krad, Ibrahim ^[1]; Gao, David Wenzhong ^[2]; Ela, Erik ^[3]; Ibanez, Eduardo ^[4]; Wu, Hongyu ^[5]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
Univ. of Denver, Denver, CO (United States)
Electric Power Research Institute, Knoxville, TN (United States)
General Electric Energy Consulting, Schenectady, NY (United States)
Kansas State Univ., Manhattan, KS (United States)

Publication Date:: 2017-06-07

Research Org.:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

OSTI Identifier:: 1372040

Report Number(s):: NREL/JA-5D00-67452
Journal ID: ISSN 1752-1416

Grant/Contract Number:: AC36-08GO28308

Resource Type:: Accepted Manuscript

Journal Name:: IET Renewable Power Generation

Additional Journal Information:: Journal Volume: 11; Journal Issue: 7; Journal ID: ISSN 1752-1416

Publisher:: Institution of Engineering and Technology (IET)

Country of Publication:: United States

Language:: English

Subject:: 24 POWER TRANSMISSION AND DISTRIBUTION; operating reserve; flexibility reserve; variable generation; variability; uncertainty; reliability; capacity

Citation Formats


                    Krad, Ibrahim, Gao, David Wenzhong, Ela, Erik, Ibanez, Eduardo, and Wu, Hongyu. Analysis of operating reserve demand curves in power system operations in the presence of variable generation.  United States: N. p., 2017. 
Web.  doi:10.1049/iet-rpg.2016.0225.

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                    Krad, Ibrahim, Gao, David Wenzhong, Ela, Erik, Ibanez, Eduardo, & Wu, Hongyu. Analysis of operating reserve demand curves in power system operations in the presence of variable generation.  United States.  https://doi.org/10.1049/iet-rpg.2016.0225

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                    Krad, Ibrahim, Gao, David Wenzhong, Ela, Erik, Ibanez, Eduardo, and Wu, Hongyu. Wed .  
"Analysis of operating reserve demand curves in power system operations in the presence of variable generation".  United States.  https://doi.org/10.1049/iet-rpg.2016.0225.  https://www.osti.gov/servlets/purl/1372040.

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@article{osti_1372040,

  title        = {Analysis of operating reserve demand curves in power system operations in the presence of variable generation},

  author       = {Krad, Ibrahim and Gao, David Wenzhong and Ela, Erik and Ibanez, Eduardo and Wu, Hongyu},

  abstractNote = {The electric power industry landscape is continually evolving. As emerging technologies such as wind and solar generating systems become more cost effective, traditional power system operating strategies will need to be re-evaluated. The presence of wind and solar generation (commonly referred to as variable generation or VG) can increase variability and uncertainty in the net-load profile. One mechanism to mitigate this issue is to schedule and dispatch additional operating reserves. These operating reserves aim to ensure that there is enough capacity online in the system to account for the increased variability and uncertainty occurring at finer temporal resolutions. A new operating reserve strategy, referred to as flexibility reserve, has been introduced in some regions. A similar implementation is explored in this study, and its implications on power system operations are analyzed. Results show that flexibility reserve products can improve economic metrics, particularly in significantly reducing the number of scarcity pricing events, with minimal impacts on reliability metrics and production costs. Furthermore, the production costs increased due to increased VG curtailment - i.e. including the flexible ramping product in the commitment of excess thermal capacity that needed to remain online at the expense of VG output.},

  doi          = {10.1049/iet-rpg.2016.0225},

  journal      = {IET Renewable Power Generation},

  number       = 7,

  volume       = 11,

  place        = {United States},

  year         = {2017},

  month        = {6}

}

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