Abstract
Haze has a significant impact on photovoltaic (PV) power generation. When the fine particulate matter reaches a certain concentration, it becomes the main factor affecting solar irradiance and seriously reduces PV power generation, but few quantitative studies on the effect caused by haze to PV power generation. This study proposes the use of the improved method of the degree of grey slope incidence to analyze the weight factors of the effects of haze on irradiance. The exponential-linear model is used to describe the impact of haze on the amount of irradiance. Furthermore, the PV system model is used to focus on the quantitative loss of PV power under the influence of haze. By modeling and analyzing the data samples of PV power generation in Hangzhou, China, it can be concluded that the losses caused by haze on PV power generation in 2017 and 2018 were 5.25 ± 1.19 % and 6 ± 1.16 % of the original PV power generation, respectively. We extended this analysis to other cities to analyze the PV data in Tianjin, China. From December 2018 to December 2019, the loss of PV power generation caused by haze in Tianjin was 8.77 ± 0.9 % . The quantitative analysis of haze on PV power can provide an effective basis for the economic evaluation of new PV systems and also plays an important role in the prediction and scheduling of PV power generation.
Highlights
Haze is a common phenomenon of air pollution and has a wide range of influence
This study focuses on the effect of haze on irradiation and the resulting reduction in PV power generation
Use (5) to calculate the haze-free irradiance, and combine the 120 KWp PV system model to convert the haze-free irradiance to PV power and compare it with the actual power generation
Summary
Haze is a common phenomenon of air pollution and has a wide range of influence. Since 2013, the haze has become common in winter in many areas of China, which is mainly caused by a temperature inversion, and there are more heating pollutants in winter [1]. When the haze concentration reaches a certain value, it becomes the main factor affecting irradiance and seriously reduces PV power generation [15]. There are studies that use observational experiments on the concentration of particulate matter in the atmosphere and use irradiance observation data to compare and analyze the variation trend between the two, which further confirms that hazy weather has an apparent effect on irradiance [18] [19] [20]. In this work [24], through analyzing the correlation between haze and PV power generation, the relationship between haze and irradiance is established to calculate the irradiance loss in haze weather.
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