Performance, Reliability and Analysis of Photovoltaic Power Systems

1
Performance, Reliability and Analysis of
Photovoltaic Power Systems

• 5.4 Performance Prediction
• (solar irradiation part)
• Tokyo, 14-15 March 2007

2
Solar irradiation

• Objectives
• evaluation of the global solar horizontal
  irradiation via satellite images and validation
  with ground based measurements (meteo stations)
• Calculation on an inclined surface and validation
  with ground based measurements at different time
  scales (PDB and other PV systems)

3
Evaluation of the solar resource

• HelioClim Solar irradiation
• Data base
• Europe - Africa
• http//www.soda-is.com

• Using data fusion, this method exploits satellite
  observation treatments, ground based measurements
  and other meteo and geographical information
• space step 10X10 km2
• daily time step since 1985 (helioclim1)
• hourly time step since 2004 (helioclim2)

4
Helioclim1 and Helioclim2 data base

• Helioclim 1
• Daily values of the global horizontal irradiance,
  calculated from one measurement every 3 hours,
  using a clear sky model
• One pixel 10X10 km2 over 50X50 km2
• Helioclim2
• hourly values of the global horizontal
  irradiance.
• One pixel 10X10 km2
• Starting in 2004

5
Comparison between values from the PDB and from
the helioclim DB

• Comparison achieved with helioclim12
• Hespul building near Lyon (FR)
• Lyon (FR) installation F1

6
F1 - 2004
Accuracy about 10 (yearly basis) 5-30
(monthly basis)
7
comparaison between mean monthly values from
Heliclim1, Helioclim2 et those measured at the
Hamburg meteo ground station, on an horizontal
surface in 2004 et 2005
8
Irradiance on an horizontal surface
Helioclim12 and Lyon meteo ground station
9
Algorithmic chains to calculate the irradiance at
the tilt SoDa and Retscreen
10
F1 - 2004
Accuracy about 10 (yearly basis) 5-30
(monthly basis)
11
HESPUL - 2004
12
Munich Trade Fair 2004
13
Some comments

• Evaluation of the Heliclim2 data base with ground
  base measurement at the horizontal and the tilt
  for the same place.
• Questions on the validity of the measurement
  performed on the irradiance at the tilt for F1
  and Hespul
• Collaboration with Task 36 on this aspect