Approach to performance evaluation of solar array based on Labview

This paper deals with a method based on Labview for evaluation of the operating solar array to improve the system quality. By means of controlling the load magnitude and periodically scanning of the operating PV system to control the output voltage of solar array from 0-VOC, to capture the data of current and voltage at the same time. And then to transmit the acquired data via a 232 interface to an upper computer, which is developed in Labview and real-time completes the data acquisition, storage and processing. The application of Labview provides a facility to study the solar array without miscellaneous peripheral equipment and needs only a few mends. It provides an approach to substitute a high-priced I-V Checker or field tester and is quite helpful for system optimization and failure diagnosing. The analyses of some examples are given in this article.