| Title |
Analysis on the Characteristics of NMOT Test for IEC 61215-2 |
| Authors |
Joon - Hak Bae ; Ki - Chai Kim |
| DOI |
http://doi.org/10.5207/JIEIE.2021.35.4.014 |
| Keywords |
NMOT; PV estimation; PV operating temperature; Photovoltaic power system; PV reliability |
| Abstract |
The operating temperature of photovoltaic module plays an important role in affecting the energy yield of photovoltaic power generation. However, due to the difficulty of calculating operating temperature accurately, operating temperature has been estimated and applied through the certified test standard of photovoltaic module which is generally in wide use and the revised IEC 61215:2005 Nominal operating cell temperature and IEC 61215-2:2016 Nominal module operating temperature. This paper found the features of the parameters used to calculate Nominal operating cell temperature value, and analyzed the effect of wind speed on operating temperature among one of the parameters. The test standard of IEC 61215-2-:2016 suggests that data collection should be done 4 hours before and after noon. But after analyzing the collected data by linear regression, by analyzing morning data it can be known that the unequal distribution was formed during the active period of photovoltaic module because of non-linear data cluster, the data before 10 a.m. was excluded, which maintained the graph in linear form by eliminating skewed non-linear temperature distribution. Also, the deviation of nominal module operating temperature could be reduced, and the result of increasing correlation coefficient could be confirmed. |