1:30 PM - 3:30 PM
[15p-P13-16] Performance Characterization of Various PV Technologies under Outdoor Conditions
Keywords:performance characterization, photovoltaic module, solar spectrum
The total cumulative PV installations in Japan were more than 30 GW in the beginning of 2016. The large market indicates that PV systems are recognized as certain power generation systems. In order to control the electricity provided by PV systems installed in electrical grids, we need to nowcast and forecast the power output supplied by the PV systems. Here, performance characterization of a photovoltaic (PV) module under a variety of ambient conditions with the accuracy and precision is the most fundamental and important, because the accuracy and precision of the power estimation of a PV module limit the accuracy and precision of the nowcasting and forecasting of the PV systems installed in electrical grids.
The National Institute of Advanced Industrial Science and Technology (AIST) has measured the performance of two sets of eight kinds (12 types) of PV modules since January 2012, which cover almost all kinds of commercially available PV technologies. One set has been measured at AIST Kyushu Center located in Saga Prefecture (33.2 °N and 130.3 °E) and the other set has been measured at AIST Tsukuba Center located in Ibaraki Prefecture (36.3 °N and 140.7 °E) in Japan. I-V curve of each module has been measured by an I-V curve tracer five minute intervals.
The purpose of this study is to develop a methodology to evaluate electric power from various photovoltaic technologies with high accuracy and precision.
Firstly, the initial power of each PV module was measured by a pulse-type solar simulator before the installation. In addition, the relative spectral response of each module was measured. Secondly, Performance Ratio (PR) is calculated using the initial indoor power, outdoor power calculated from the measured I-V curves, and in-plain global solar irradiance. Thirdly, temperature and spectral mismatch corrections are conducted for PR using back surface module temperature measured by t-type thermocouples and solar spectra measured by spectroradiometers, which results in PRSTC (Standard Test Conditions). If we perfectly evaluated every possible effects which influence the power of a PV module, the PRSTC should be one always. Finally, we discuss the accuracy and precision of the methodology based on the PRSTC.
The National Institute of Advanced Industrial Science and Technology (AIST) has measured the performance of two sets of eight kinds (12 types) of PV modules since January 2012, which cover almost all kinds of commercially available PV technologies. One set has been measured at AIST Kyushu Center located in Saga Prefecture (33.2 °N and 130.3 °E) and the other set has been measured at AIST Tsukuba Center located in Ibaraki Prefecture (36.3 °N and 140.7 °E) in Japan. I-V curve of each module has been measured by an I-V curve tracer five minute intervals.
The purpose of this study is to develop a methodology to evaluate electric power from various photovoltaic technologies with high accuracy and precision.
Firstly, the initial power of each PV module was measured by a pulse-type solar simulator before the installation. In addition, the relative spectral response of each module was measured. Secondly, Performance Ratio (PR) is calculated using the initial indoor power, outdoor power calculated from the measured I-V curves, and in-plain global solar irradiance. Thirdly, temperature and spectral mismatch corrections are conducted for PR using back surface module temperature measured by t-type thermocouples and solar spectra measured by spectroradiometers, which results in PRSTC (Standard Test Conditions). If we perfectly evaluated every possible effects which influence the power of a PV module, the PRSTC should be one always. Finally, we discuss the accuracy and precision of the methodology based on the PRSTC.