Transcript of Photovoltaic Environmental Performance and Reliability (PEPER) Project Objectives: Monitor...
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- Photovoltaic Environmental Performance and Reliability (PEPER)
Project Objectives: Monitor performance of grid-tied PV systems
Report Energy Yields and Degradation Rates Evaluate new PV system
technologies Principal Investigator for Part 1: Alex Cronin
Students: Adria Brooks, Tucker Bundgard, Alex Hickey, Daniel
Cormode, Deanna Lewis, Nick Davidson, Ryan Price, Vincent Lonij,
Steve Pulver Collaborators: Tucson Electric Power, AZRISE,
Biosphere 2, SOLON Corporation, NREL, University of Arizona
Graduate College, Science Foundation Arizona, NASA Space Grant
Consortium
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- TEP PV test yard 4350 E. Irvington Rd.
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- utility grade AC kwh meter and custom DC current and voltage
monitors
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- Sunpower system DC current and voltage monitors
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- Data loggers from JK microsystems
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- Tours: weve had over 1,500 visitors since 2009, And given
public lectures to over 6,000 people
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- AC Output every minute shown for 2 days: Data on-line at:
www.UAPV.org
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- Daily output from a 1.5 kW PV system Y f = 5.3 h/day = 1935
h/yr Y f = final yield is defined in IEC standard 61724.
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- TF
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- Comparison of final yields in 6 places
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- Degradation Rates for 20 PV systems Steve Pulver, Daniel
Cormode, Alex Cronin, Dirk Jordan, Sarah Kurtz, Ryan Smith,
Measuring Degradation Rates Without Irradiance Data, 35th IEEE
Photovoltaics Specialists Conference, Honolulu, HI (2010).
Reference:
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- Temperature and DC Voltage
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- DC Voltage vs Temperature
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- Measured Efficiency for 9 systems
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- Niket Thakkar, Alex Cronin, Daniel Cormode, Vincent Lonij, A
Simple Nonlinear Model for the Effect of Partial Shade, 35th IEEE
Photovoltaics Specialists Conference, Honolulu, HI (2010).
Reference: Mutual Shading Large de-rating
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- S1 S2 model S1 S2 model Niket Thakkar, Alex Cronin, Daniel
Cormode, Vincent Lonij, A Simple Nonlinear Model for the Effect of
Partial Shade, 35th IEEE Photovoltaics Specialists Conference,
Honolulu, HI (2010). Reference:
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- S1 S2 model Niket Thakkar, Alex Cronin, Daniel Cormode, Vincent
Lonij, A Simple Nonlinear Model for the Effect of Partial Shade,
35th IEEE Photovoltaics Specialists Conference, Honolulu, HI
(2010). Reference:
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- Niket Thakkar, Alex Cronin, Daniel Cormode, Vincent Lonij, A
Simple Nonlinear Model for the Effect of Partial Shade, 35th IEEE
Photovoltaics Specialists Conference, Honolulu, HI (2010).
Reference: Extrapolations using our non-linear model of mutual
shading. Shade de-rating Optimized kwh/acre
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- Heuristic for mutual shading: get a clear view of the sky from
the bottom of each module.
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- Plans Publish yield and efficiency statistics for PV models
Evaluate PV Performance Models: CEC 5-parameter model Sandia / King
Model PVsyst / PVUSA SAM (NREL) Model Collaborate more with NREL,
SANDIA, SunPower, Semprius, SolFocus, Solindra, SOLON, Global
Solar, TEP and Biosphere2
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- Photovoltaic Environmental Performance and Reliability (PEPER)
Project Objectives: Monitor performance of grid-tied PV systems
Report Energy Yields and Degradation Rates Evaluate new PV system
technologies Principal Investigator for Part 1: Alex Cronin
Students: Adria Brooks, Tucker Bundgard, Alex Hickey, Daniel
Cormode, Deanna Lewis, Nick Davidson, Ryan Price, Vincent Lonij,
Steve Pulver Collaborators: Tucson Electric Power, AZRISE,
Biosphere 2, SOLON Corporation, NREL, University of Arizona
Graduate College, Science Foundation Arizona, NASA Space Grant
Consortium
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- Photovoltaic Environmental Performance and Reliability (PEPER)
Project Objectives: High-quality Irradiance data Atmospheric
Science and Power Forecasting Principal Investigator for Part 2:
Bill Conant Students: Anna Woschuitz Collaborators: Tucson Electric
Power, NREL
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- Photovoltaic Environmental Performance and Reliability (PEPER)
Project Objectives: Develop an accurate temperature measurement
system for monitoring modules at the TEP Yard; Evaluate the
performance of TF and concentrator modules at TEP Principal
Investigator for Part 3: Raymond K. Kostuk, Jose Castro Students:
Derek Zhang Collaborators: Prism Solar Technologies, Global
Solar
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- Comparison of Temperature Sensors Thermocouple: A junction of
two different metals which produce a voltage related to the
temperature of the junction. Currently at TEP Useful range: 200 C
to +1350 C Thermistor: Generally made of ceramic or polymers, the
resistance varies with temperature Useful range: 90 C to 130 C
Greater precision
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- Thermistor on GSE 45W modules
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- Thermistor Temperature Measurement Vs (+5V) High precision, low
temperature coefficient resistor: Rc Vout
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- Concentration Test Setup Xenon Arc Lamp Collimating Lens
Homogenizing Optics PV Cell Under Test Solar simulator: 300W
Xenon-arc lamp with AM1.5 filter Flash I-V curve obtained with
source meter Temperature is maintained at 25 C Irradiance
referenced with calibrated silicon detectors Irradiance
Distribution on PV Cell Concentrating Lens
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- Concentration Test Results
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- Plans Use Global Solar Cells with Prism Concentrators Maximize
yields by harnessing efficiency non-linearities UA Students working
at Global Solar and Prism Solar Tech. Calibrate thermistor sensors
for high accuracy temperature measurements;