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A model to determine soiling,shading and thermal losses from pv yield data

Clean Energy 2022年第2期6卷 372-391页

作者： S.Ghosh J.N.Roy C.Chakraborty Advanced Technology Development Centre Indian Institute of Technology Kharagpur721302India Department of Electrical Engineering Indian Institute of Technology Kharagpur721302India

Apart from being a clean source of energy,photovoltaic(pv)power plants are also a source of income generation for its investors and ***,mitigation of system losses is crucial for economic operation of pv *** losses due to soiling,shading and temperature in pv plants go as high as 50%.Much of these losses are unaccounted initially,which can jeopardize the economic viability of pv *** paper aims to provide a model to determine losses due to soiling,shading and temperature using quantities like irradiance,cell temperature,DC power and current,which are readily available in pv yield data captured by the remote monitoring system,without involving any additional sensors or *** this study,soiling,shading and thermal losses were calculated using pv yield data obtained from a 30-kWp pv plant located in Kharagpur,*** results showed soiling and shading losses as high as 25.7%and 9.7%,respectively,in the month of *** loss was verified by measuring transmittance loss of coupon glasses installed in the vicinity of the *** loss was verified by shadow simulation using an architectural tool(SketchUp).Array thermal loss obtained using the proposed methodology was found to be in line with the estimated value obtained from pvsyst ***,using time-series data,the energy losses corresponding to soiling,shading and temperature effects were calculated by a numerical-integration *** monetary loss due to these energy losses thus obtained provides criteria for deciding when to mitigate the sources of these losses.

关键词： solar photovoltaics solar pv plant soiling losses solar shading losses solar pv system losses

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