Transcript
application:
Primary Reserve GSS™
Grid Storage Solution
THE NEED FOR PRIMARY RESERVE
�� Electric power grids must maintain frequency (50Hz or 60Hz depending on region) or risk a blackout
− Frequency can fluctuate due to disturbances in generation, load, or transmission
�� Primary Reserve resources serve to immediately stabilize the grid’s frequency
− Ramp up and down in response to fluctuations in grid frequency; responds automatically in seconds
�� Generators reserve 3% to 5% of their capacity for Primary Reserve
− Also known as Frequency Response, Frequency Containment, Primary Frequency Control, or Spinning Reserve
Reserve capacity
Generator output is limited
to provide primary reserve
Generator can provide increased
output with a GSS™ providing
its primary reserve obligation
GENERATOR GENERATOR + GSS™
Gen
erat
or P
ower
Out
put
Risk of blackouts
Risk of blackouts
60
59
59.559.9 60.1
60.5
61
HzGrid Frequency
Totalblackout
Totalblackout
Emergency Emergency
Low High
Too Low - more power needed
Too High - reduce power
Normal Range
THE ROLE OF ENERGY STORAGE
�� A battery energy storage system can effectively replace a generator’s reserve generation capacity obligation
− The NEC Energy Solutions GSS™ has been successfully used in this manner since 2009 and is the highest performing reserve asset in the region, faster and more consistent than other resources
VALUE PROPOSITION
�� Release of 3%-5% reserve capacity allows generation plants to increase output
�� Additional generation capacity increases generator’s revenue
�� Depending on the price of energy, and the nature of the reserve requirements, this can yield significant return on investment for the energy storage owner
�� Energy storage also provides faster, more precise, and more consistent response than traditional assets for primary reserve
GSS™
Generator
Pow
er O
utp
ut
Time
GSS™ is capable of much faster response times (in milliseconds) and power output ramp rates than traditional generators.
�� A stable grid is critically important to support Chile’s mining industry
�� In 2009, a 12MW, 4MWh GSS™ was installed in the Atacama Desert at the Los Andes substation in northern Chile to provide primary reserve to support a local power plant
�� In 2011, a second 20MW, 5MWh GSS™ was installed by the sea coast at Angamos, also in northern Chile, to replicate the success of the Los Andes site but supporting a different power plant
�� Both units have been performing with faster response, greater consistency, and higher availability than any other reserve resource in the region
�� Power plant output is now consistently higher than it was before by about 5%, providing increased revenue for their owners
NEC Energy Solutions, Inc.155 Flanders Road Westborough, MA 01581 (508) 497-7319 www.neces.com© 2014 NEC Energy Solutions, Inc. All rights reserved. MD100130-001 1
case study:
CDEC-SING* (Chile)
GRID
FREQUENCY
GSS
MW
50.5
50.0
49.5
49.0
48.8
15.0
10.0
5.00
0.00
-5.0
-10.
-15.
49.91 Hz
48.91 Hz
49.91 Hz
June 1114:48:00
14:50 14:52 14:54 14:56:15Time of Day
Grid Frequency
GSS™
100 105 110 115 120 125 130 135 140 145 150
25
20
15
10
5
0
Num
. Ob
s.
(MW)
Without GSS™ With GSS™
12.5MW/4MWh GSS™
Los Andes
20MW/5MWh GSS™
Angamos
Operational data from Los Andes taken June 11, 2011
Generator average output increased 5% after addition of the GSS™.
The GSS™ has responded faster and more consistently to frequency disturbances than any other primary reserve unit in Chile.
*The Center for Economic Load Dispatch of the Northern Interconnected System (CDEC-SING) is the entity in charge of coordinating operation of the electric utility grid in Northern Chile.
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