PV Plant Performance Ratio (PR) Measurements and...
Transcript of PV Plant Performance Ratio (PR) Measurements and...
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PV Plant Performance Ratio (PR)Measurements and Limitationsof Acceptance Test PR
Amiram Roth-DeblonRegional Managing Director Asia Pacificjuwi Renewable Energies Private Limited (Singapore)06.06.2012
Contents
1. juwi at a glance
2. Definitions: Solar Power Plant Performance
3. How to monitor PV plant performance
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Renewable Energy Projects –We Make it Happen
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juwi at a Glance
Established1996, privately owned by 2 founders
Workforce> 1,750 employees
Revenueapprox. 800 Mil. € in 2010approx. 1 billion € in 2011
Headquartes of the juwi group in Wörrstadt, Germany
Number of Renewable Power Plantsapprox. 2,000 installations
Total Capacityapprox. 1,900 megawatts
Total Investment (since 1996)approx. 4.0 billion €
Annual Energy Outputapprox. 3.5 billion kilowatt-hoursCorresponds to the annual electricitydemand of one million households
Annual Reduction of Emissionsapprox. 2.5 billion kg of CO2
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Our Vision
Hydro
Pow
er
Geotherm
alEnergy
Bioenergy
Solar
Energy
Wind
Energy
Electrom
obility
Green
Buildings
Work together to implement renewable energieseconomically and reliably with passion.
100% Renewable Energies
Energy EfficiencyClean Power Production
Research & Development Cooperations
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Our Services: It‘s all about the project
Consulting &Acquisition
Planning DevelopmentFinancing &Sales
Construction Management
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Offices, Projects and New Markets
Headquarters in Germany
Western EuropeFrance, Great Britain
Southern EuropeItaly, Spain, Greece
Eastern EuropeCzech Republic, Poland, Bulgaria
AmericasUSA, Costa Rica, Chile
AsiaIndia, Singapore
AfricaSouth Africa
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Selected ReferencesLieberose, Brandenburg, GermanyFree-field / 71 megawatts
Blue Wing, Texas, USAFree-field / 16 megawatts
Torreilles, Pyrenees, FranceFree-field / 12 megawatts
Rajkot, Gujarat, IndiaFree-field / 10 megawatts
Goodyear, Phillipsburg, GermanyRooftop / 7.4 megawatts
Selected References: Solar Energy
Goodyear Rooftop, Phillipsbrug Germany (7.4MW)
Former military area in Brandenburg, Germany (71 MW)
Selected References: Solar Energy
Selected ReferencesRajasthan, IndiaFree-field / 5.3 megawatts
Drachevo, BulgariaFree-field / 3.5 megawatts
Tambo Real, ChileFree-field / 1.2 megawatts
Covered Market, Verona, ItalyRooftop / 1.67 megawatts
Mont Jali, Kigali, Rwanda (Africa)Free-field / 250 kilowatts
Rajkot, Gujarat, India (10 MW)
Surendranagar, Gujarat, India (2.5 MW)
2. Definitions: Solar Power PlantPerformance
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Monitoring unit
Measurement ofPV plant parameters
Measurement ofmeteorological
parameters
How to monitor PV plant performance
Calculation ofperformanceindicators
Reference YieldFinal YieldSpecific YieldPerformanceRatioAvailability
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PV plant performance indicators - I
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PV plant performance indicators - II
Further generic performance indicators
AvAvAvAv : Availability [%]Real operation time / theoretical maximum operation time
CUFCUFCUFCUF : Capacity Utilization Factor [%]ETU / theoretical maximum energy with continuous operation at nominal capacity
What is the Performance Ratio?
PR =Actual Yield
Ideal Yield
PR =
X
Where are the losses in the PV plant?
LV AC-Cable HV AC-CableDC-Cable
EIN (theoretical) Eout (real)
PR = Quality Factor
Losses
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PR – The Ultimate PV Performance indicator
The Performance of any PV power plant, anywhere, is ultimately defined bythe PR
Now the question arises:How do we determine the PR as precisely as possible….
Any investor or bank wants a simple and reliable method to determine the PR
A rule of thumb would be:Use a simple formula with as few parameters as possibleMeasure as precise as possible
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Details of PR Calculation
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PR DeterminationTwo parameters are the key
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3. How to monitor PV plant performance
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How can these values be measured?How precise are these measurements?
Yf or ETU (Real Yield) is always available� just read the utility meter� Simple and precise (0.2% to 2%)� Can be done remotely
gPV (Global Irradiation in the module plane)� needs meteorological sensors or satellite data� Subject to various limitations� Much less precise (2% to 15%)
PR: Pyranometer vs. Satellite
Pyranometer & External Weather-Station Satellite
Satellite
What are the PROs & CONs?
Local External
High Accuracy Independent source
Short Intervals No soiling-problems
Measuring in module-plane No calibration of sensors
No gaps
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Rules for Solar irradiation measurements
Some fundamental rules are:Do not use Crystalline Irradiation sensors(only for auxiliary data or small systems, not precise enough for Power plants)
Pyranometers are the best choice but:− Use the best ones available (CMP 11, Secondary class, Calibrated)− Use at least two, to minimise measurement errors− Make sure the sensor is installed and used properly− Soiling will have a significant effect
Install a powerful monitoring systemIndependent of inverters (i.e. skytron energy or similar)
Engage a professional Operation and Maintenance provider− As backup, use independently provided satellite data and a calculated PR
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Thank You Very Much forYour Attention!
Contact:Amiram Roth-Deblonjuwi Renewable Energies Private Limited20 Havelock Road, # 02-25 Central Square,Singapore 059765Tel. +65 64 28 86 70 Mob. +65 84 98 74 66Fax. +49. (0)6732. 96 [email protected]