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Organizers Firstgreen Consulting Pvt Ltd
MNIT Jaipur
Solar Power Project Development
One week training course certified by NISE
Solar Resource Assessment
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Solar Radiation Components
Average GHI in India Average DNI in India
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Average GHI and DNI In India
● Thermal Pyranometers – These are also knownas solarimeters and typically consist of a blackmetal plate absorber surface below twohemispherical glass domes in a white metalhousing.
● Solar irradiance warms up the metal plate inproportion to its intensity
● Silicon Sensors – These are cheaper thanpyranometers and consist of a PV cell, oftenusing crystalline silicon.
● The current delivered is proportional to theirradiance.
● Well maintained land-based sensors canmeasure the solar resource with a relativeaccuracy of 3-5%.
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Land Based Measurement
On‐site monitoring Accurate Representation of the Project Site Customizable for Various Technologies (e.g., PV or CSP)
and Various Users Flexible Equipment Options and Costs Small Environmental Footprint Straight‐Forward Installation & Operation Self‐Contained Communications and Power Supply
Maintenance Regular Schedule Clean and Level Instrumentation Verify Site Security and Overall Conditions
Data Validation and Quality Control Regular System and Data Inspection Comparison with Reference Data Extreme or Suspect Values
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Land Based Measurement
● Site Description● Solar Statistics● Meteorological Statistics● Monthly and Diurnal Trends● O&M Summary
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Data Summaries
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Investment Grade Solar Resource Assessment
● Site Location and Exposure● Proximity to Project Site● Reference Station● Period of Record● Data Trends● Data Recovery Rate● Site Maintenance● Instrument Calibration● Correlation Between Sites
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Off Site Data
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Adjusting to the Long Term
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Data Uncertainty
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Uncertainty in Long Term Projections
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Uncertainty in Energy Yield Prediction
● India Meteorological Department data from 23field stations of the radiation network,measured from 1986.
● NASA’s Surface Meteorology and SolarEnergy data set. This holds satellite – derivedmonthly data for a grid of 1°x1° covering theglobe from 1984.
● The METEONORM global climatologicaldatabase and synthetic weather generator.This contains a database of ground stationmeasurements of irradiation and temperature.In cases where a site is over 20 km from thenearest measurement station.
● Satellite-derived geospatial solar data productsfrom the United States-based NREL. Annualaverage DNI and GHI, latitude tilt, and diffusedata are available at 10 km resolution for India,
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Data Sources for Solar Radiation
14 Location: Jodhpur (Rajasthan) India
Energy Yield Prediction (RETScreen)
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Typical Horizontal Solar Irradiation in India
The annual mean GHI in Chennai is 2,021 kWh/m2. By optimally-orientating a fixed tilt plant, theyearly sum of global irradiation may be increased to 2,048 kWh/m2. Based on this resource, a 1MWp plant with a PR of 80% will give an AC yield of 1,638 MWh.
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Monthly Direct and Diffused Rations in Chennai
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Mean Daily GHI
Where there is significant uncertainty in the data sources, a short term data monitoring campaignmay be considered. Short term monitoring (ideally up to one year in duration) may be used tocalibrate long term satellite-derived data and increase the confidence in the long term energyyield prediction.
Sourcing measured environmental data
Calculating the irradiation incident on the tilted collector plane
Modelling the performance of the plant with respect to varying irradiance
Applying losses
Applying statistical analysis of resource data and assessing the uncertainty in input values
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Energy Yield Prediction – How?
Air Pollution Shading Module Temperature Incident Angle
Soiling Module Mismatch DC Cable Resistance Inverter Performance
AC Losses Degradation Auxiliary Power Downtime
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Energy Yield Prediction – Losses in the PV System
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Typical Yield Assessment Report Results
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Typical Losses in the Plant
FirstGreen Consulting Private Limited
Gurgaon:
MA 74, Gurgaon – 122002, India
Tel.: (+91) 124 4650224, 9899295854
Web: www.firstgreen.co
Email: [email protected]
Thank You
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