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Title: Timescales of energy storage needed for reducing renewable energy curtailment

Abstract

Integrating large amounts of variable generation (VG) resources such as wind and solar into a region's power grid without causing significant VG curtailment will likely require increased system flexibility via changing grid operation and deploying enabling technologies such as energy storage. This article analyzes the storage duration required to reduce VG curtailment under high-VG scenarios. The three analysis scenarios assume VG provides 55% of the electricity demand in the largely isolated Electricity Reliability Council of Texas grid system in 2050, with three different proportions of wind and solar generation. Across the three scenarios, 11%-16% of VG energy is curtailed without storage due to system-generation constraints. When 8.5 GW of storage capacity with 4 h of duration are added, curtailment is reduced to 8%-10% of VG. Additional storage duration further reduces curtailment, but with rapidly diminishing returns. At least half the potential avoided-curtailment benefits are realized with 8 h of storage, and the first 4 h provide the largest benefit. At VG penetrations up to 55%, there appears to be little incremental benefit in deploying very-long-duration or seasonal storage.

Authors:
;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
OSTI Identifier:
1468330
Report Number(s):
NREL/JA-6A20-71657
Journal ID: ISSN 0960-1481
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Resource Relation:
Journal Name: Renewable Energy; Journal Volume: 130; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 29 ENERGY PLANNING, POLICY, AND ECONOMY; energy storage; variable generation; wind; solar; photovoltaic; curtailment

Citation Formats

Denholm, Paul, and Mai, Trieu. Timescales of energy storage needed for reducing renewable energy curtailment. United States: N. p., 2019. Web. doi:10.1016/j.renene.2018.06.079.
Denholm, Paul, & Mai, Trieu. Timescales of energy storage needed for reducing renewable energy curtailment. United States. doi:10.1016/j.renene.2018.06.079.
Denholm, Paul, and Mai, Trieu. Tue . "Timescales of energy storage needed for reducing renewable energy curtailment". United States. doi:10.1016/j.renene.2018.06.079.
@article{osti_1468330,
title = {Timescales of energy storage needed for reducing renewable energy curtailment},
author = {Denholm, Paul and Mai, Trieu},
abstractNote = {Integrating large amounts of variable generation (VG) resources such as wind and solar into a region's power grid without causing significant VG curtailment will likely require increased system flexibility via changing grid operation and deploying enabling technologies such as energy storage. This article analyzes the storage duration required to reduce VG curtailment under high-VG scenarios. The three analysis scenarios assume VG provides 55% of the electricity demand in the largely isolated Electricity Reliability Council of Texas grid system in 2050, with three different proportions of wind and solar generation. Across the three scenarios, 11%-16% of VG energy is curtailed without storage due to system-generation constraints. When 8.5 GW of storage capacity with 4 h of duration are added, curtailment is reduced to 8%-10% of VG. Additional storage duration further reduces curtailment, but with rapidly diminishing returns. At least half the potential avoided-curtailment benefits are realized with 8 h of storage, and the first 4 h provide the largest benefit. At VG penetrations up to 55%, there appears to be little incremental benefit in deploying very-long-duration or seasonal storage.},
doi = {10.1016/j.renene.2018.06.079},
journal = {Renewable Energy},
number = C,
volume = 130,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2019},
month = {Tue Jan 01 00:00:00 EST 2019}
}