DATA QUALIFICATION FOR SOLAR RADIATION MAPS GENERATION

Abstract

To have a map with high reliability as a result, the process of collecting, analyzing, and qualifying the data becomes indispensable. This work aims to present the results of the analysis and qualification of the data generated by INMET and APAC solarimetric stations, located in cities in the State of Pernambuco and some cities close to its limits, aiming at the composition of the solar radiation map of the State. Hourly data of horizontal global solar radiation were used in the period 2015 -2017. In this one, it was possible to verify that some had excellent data, that is, with few flaws and faults. However, others are concerned because of their number of holes, with large intervals of days showing total lack of recording of hourly radiation and others being invalidated by insufficient data. Such anomalies can be had by the lack of electrical energy in the power supply network of the station, by the lack of calibration and/or tests of the sensors installed in it, failure in the transmission of data to the server, among others. The method of data verification was the observation of the daily Kt filter, where all values below 0.15 were analyzed individually. For such analysis, the difference between the minimum and maximum temperature recorded, maximum and minimum humidity and the maximum and minimum dew point were seen. If gross changes were detected between them, it was known that there were flaws in the data, causing distrust and infeasibility of using them. When not, a possible use and adequacy of these was sought..