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The influence of meteorological factors on the photovoltaic daily generation
Pages: 1423-1428
Year: Issue:  10
Journal: Rural Energy

Keyword:  meteorological factorsphotovoltaic power generationgrey correlationthe stepwise regressioneffect;
Abstract: Using PV generation data from Linyi Juhuang PV tracking demonstration power plant in2011 and meteorological observational data at the same time, and adopting correlation analysis and regression analysis, this paper analyzes the relationship between meteorological factors and generation. The result of grey correlation degree method shows that the diurnal variation of the sunshine duration and wind speed, evaporation trend and generating the consistency of the highest, followed by low temperature, cloud cover, the water vapor pressure and total cloud cover, and the temperature factor with electricity generated from big to small in turn is the tallest of correlation between temperature and 0 cm ground temperature, average temperature and daily minimum temperature.Changing trend consistency degree and month electricity from big to small average wind speed,sunshine time, followed by month total cloud cover, mean monthly maximum temperature, monthly evaporation, monthly mean temperature, monthly average vapor pressure, the monthly average relative humidity, average monthly 0 cm ground temperature, monthly average minimum temperature,monthly low cloud cover, consistency is the smallest monthly rainfall. The sepwise regression results show that hours of sunshine has the most effect on daily generation, and evaporation capacity has the second effect, which are both positive effects. The relatively small influencing factors involve ground temperature of 0 cm, amount of precipitation and average wind speed, and they are all negative effects. Is the biggest meteorological factors impact on the monthly electricity month average temperature, sunshine duration and the month are positive effect; Next month the average highest temperature and total cloud cover for the negative effects, monthly average wind speed to minimum the influence of power generation, photovoltaic(PV) month is positive effect.
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