PERFORMANCE ANALYSIS OF A GRIDCONNECTED PV SYSTEM IN NORTHWEST OF SPAIN

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PERFORMANCE ANALYSIS OF A GRID-CONNECTED PV
SYSTEM IN NORTHWEST OF SPAIN

• A. de Miguel and J. Bilbao
• University of Valladolid (Spain)

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OBJECTIVES

• Information on operational performance of PV
  plant
• Efficiencies evaluation (array yield, final
  yield)
• System Losses

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PLACE and SYSTEM CHARACTERISTICS
4.3 kWp grid-connected PV plant Monocristalline
PV panels Geographical location of PV station
C.I.B.A. ( Low Atmosphere Research Centre)
41.82 N 4.93 W 845 m a.s.l.
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PLACE and SYSTEM CHARACTERISTICS
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PV plant layout
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YIELD AND PERFORMANCE RATIOS
Array Yield (YA) electric energy (kWh/d)
produced and delivered by the array, in one
day, divided by the nominal peak power , Pnom, of
the array (kWp).
Final yield (Yf ) is the useful output of the PV
plant per kWp installed
YfEuse,PV/Pnom
Reference yield, Yr, ratio of the total
irradiation (kWh/m2) per day and the reference in
plane irradiance , (1kW/m2).
Performance ratio (PR) Ratio between final yield
and reference yield (Yf)
PRYf/Yr
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SYSTEM LOSSES
INVERTER LOSSES LS ARRAY LOSSES Thermic
capture losses, Lct Miscellaneous capture
losses, Lcm
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MONITORING RESULTS
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PV Generator Output
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Monthly mean irradiation on horizontal surface
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Monthly mean irradiation over panel surface
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Monthly mean air temperature evolution
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Monthly values of Yf, Lct, Lcm and PR
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Daily values of Yf, Lct, Lcm and PRAugust 2001
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Hourly values of yf, ls, lct, lcm and prAugust
17, 2001
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Instantaneous values of yf, ya, yr, lcm and pr17
November, 2001
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Instantaneous values of yf, ya, yf, lcm and
pr2nd July , 2001
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Monthly mean values of system efficiencies,
performance ratio and module temperature (ºC)
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Characteristic parameters and system efficiencies

• Ya Yf Yr EGrid PR ?A,mean
  ?Inv ?Tot
• kWh/kWp kWh/kWp kWh/kWp kWh
• 1352 1180 1699 5099 69.8 13.68 89.45 12
  .15

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Conclusions
First PV system grid connected and monitoring in
the region. First data base for modelling PV
system