ecoult energy storage - solar smoothing and shifting
DESCRIPTION
PNM, the leading electric utility company in New Mexico, United States, has integrated an Ecoult UBer™ (UltraBattery® Energy Resource) with a solar energy-generating farm to demonstrate smoothing and shifting of volatile solar power and the ability to use the combination as a dispatch-able renewable energy resource. The PNM Prosperity project is the first solar energy storage facility in the United States that is fully integrated into a utility’s power grid. It features one of the largest combinations of photovoltaic (PV) energy and solar panel battery storage in the United States.TRANSCRIPT
Case Study: Solar Smoothing and Shifting
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Separator
PbPbO2
Lead-Acid Cell
+ -Separator
PbO2CarbonElectrode
Ultracapacitor
-+
i i1i2+ -
UltraBattery® Technology
Market Size:
$3.5B
MotiveBattery
Market Size:
$6B
StandbyBattery
New Lead-Acid Market
PSOC UltraBattery
Market Size:
$15B
StarterBattery
State of Charge
1881
0%
100%80%
20%
1960 1980 Today
The New Dimension in a Lead Acid World
State of Charge
The New Dimension in a Lead Acid World
High Efficiency in Partial State of Charge Use
UltraBattery®: highly efficient & high longevity
Lower Efficiency & higher rate of degradation
Lower Efficiency and higher rate of degradation.
20%
80%
93% – 95% DC to DC
100%
0%
Solar Smoothing & Shifting/Firming
Smoothing Continually Demonstrated
Clear Day Cloudy Day
18/04/2012 6:00:00 AM 19/04/2012 12:00:00 AM 19/04/2012 6:00:00 PM-200
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Data: 18/4-19/4/2012White – PV OutputOrange – Battery OutputGreen – Primary Meter (Site Output)
Input Signal: SW Corner Irradiance Sensor - 70% gain -200
-1000
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Magnified Results for Cloudy Day
Targeting ‘Firming’ or Creation of an Energy Block
Idealized Summer ProfileTargeting Single PM Peak
Idealized Winter ProfileTargeting Dual AM/PM Peaks
Solar Energy Shifting
Net SystemOutput
PV Output
Battery Output
Shifting/Firming Using Predictive AlgorithmDate: 22/3/12
Battery Shifting Data Results from Initial Implementation
Firmed PV Production
Command interval of ~2 minutes, will go to <30 seconds (eliminates saw tooth shape)
Confirmed accuracy of PV energy prediction
Confirmed accuracy of SoC prediction
Shifting Algorithm Model Compares Very Well on Clear Days
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0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:00
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Axis Title
Comparison of Modeled to Actual System Output
Algorithm System Output
Acutal Sytem Output
Comparison of Modelled to Actual System Output
2/21/12 Run Red – Actual DataBlue – Model Prediction
0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:00
Algorithm SOC Actual SOC
State of Charge Comparison - Shifting Algorithm
State of Charge Comparison – Shifting Algorithm
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0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:00
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Axis Title
Comparison of Modeled to Actual Battery Output
Algorithm Battery Output
Actual Battery Output
Comparison of Modelled to Actual Battery Output
Continue Test Plans
-200-100
0100200300400500600
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0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:00
kW
Axis Title
Comparison of Modeled to Actual System Output
Algorithm System Output
Acutal Sytem Output
Ecoult &
Flexible Storage Solutions
Recycling Safe
Globally SuccessfulAustralian Technology
The Energy Storage Solution of Choice
Case Study: Solar Smoothing and Shifting
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