This paper presents a defect analysis and performance evaluation of photovoltaic(PV)modules using quantitative electroluminescence imaging(EL).The study analyzed three common PV technologies:thin-film,monocrystalline ...This paper presents a defect analysis and performance evaluation of photovoltaic(PV)modules using quantitative electroluminescence imaging(EL).The study analyzed three common PV technologies:thin-film,monocrystalline silicon,and polycrystalline silicon.Experimental results indicate that monocrystalline silicon panels have the lowest degradation rate,ranging from 0.861%to 0.886%,compared to thin-film panels,which range from 1.39%to 1.53%,and polycrystalline panels,which range from 1.32%to 1.62%.The primary defects in thin-film technology include the formation of small shunts that gradually accumulate,causing shading and obstructing current flow,thereby reducing efficiency.For monocrystalline and polycrystalline technologies,defects include oxidation leading to loss of connection,layer wrinkles causing shading,and the accumulation of dust and animal waste.The study also demonstrates the effectiveness of using EL to identify micro-defects with high accuracy.The comprehensive quantitative EL method not only assesses defects with high accuracy but also offers practical insights for improving maintenance strategies and performance in tropical climates.展开更多
This paper provides a detailed analysis of the performance and economics of a 50 MW grid-connected solar power plant in Vietnam over a 4.5-year operational period from January 2020 to June 2024.The study systematicall...This paper provides a detailed analysis of the performance and economics of a 50 MW grid-connected solar power plant in Vietnam over a 4.5-year operational period from January 2020 to June 2024.The study systematically collected and analyzed key solar performance metrics,including the correlation between solar irradiance and temperature,as well as the relationship between irradiance and the plant’s performance ratio(PR).The findings indicate that PR ranged from 0.61%to 0.84%,with solar irradiance varying between 128 and 192 kWh/m^(2)/month.The capacity utilization factor ranged from 12.82%to 19.47%,and the average final yield varied between 3.24 and 4.23 h/d,consistent with other studies.Power losses ranged from 50 to 130 MWh/month,totaling 5978.2 MWh over the period.The cumulative electricity generation reached 383768 MWh.The economic analysis revealed a simple payback period of 7 years with a levelized cost of electricity of 0.05 USD/kWh.The study highlights the importance of implementing effective maintenance strategies to minimize the gap between theoretical and actual performance,thereby ensuring long-term economic viability,particularly in the context of high interest rates in developing countries.展开更多
文摘This paper presents a defect analysis and performance evaluation of photovoltaic(PV)modules using quantitative electroluminescence imaging(EL).The study analyzed three common PV technologies:thin-film,monocrystalline silicon,and polycrystalline silicon.Experimental results indicate that monocrystalline silicon panels have the lowest degradation rate,ranging from 0.861%to 0.886%,compared to thin-film panels,which range from 1.39%to 1.53%,and polycrystalline panels,which range from 1.32%to 1.62%.The primary defects in thin-film technology include the formation of small shunts that gradually accumulate,causing shading and obstructing current flow,thereby reducing efficiency.For monocrystalline and polycrystalline technologies,defects include oxidation leading to loss of connection,layer wrinkles causing shading,and the accumulation of dust and animal waste.The study also demonstrates the effectiveness of using EL to identify micro-defects with high accuracy.The comprehensive quantitative EL method not only assesses defects with high accuracy but also offers practical insights for improving maintenance strategies and performance in tropical climates.
文摘This paper provides a detailed analysis of the performance and economics of a 50 MW grid-connected solar power plant in Vietnam over a 4.5-year operational period from January 2020 to June 2024.The study systematically collected and analyzed key solar performance metrics,including the correlation between solar irradiance and temperature,as well as the relationship between irradiance and the plant’s performance ratio(PR).The findings indicate that PR ranged from 0.61%to 0.84%,with solar irradiance varying between 128 and 192 kWh/m^(2)/month.The capacity utilization factor ranged from 12.82%to 19.47%,and the average final yield varied between 3.24 and 4.23 h/d,consistent with other studies.Power losses ranged from 50 to 130 MWh/month,totaling 5978.2 MWh over the period.The cumulative electricity generation reached 383768 MWh.The economic analysis revealed a simple payback period of 7 years with a levelized cost of electricity of 0.05 USD/kWh.The study highlights the importance of implementing effective maintenance strategies to minimize the gap between theoretical and actual performance,thereby ensuring long-term economic viability,particularly in the context of high interest rates in developing countries.
