PV generator performance using Cassy System

This paper presents an experimental investigation for the performance of a PV generator using Cassy System environment. Two PV panels were exposed to severe environmental conditions such as high temperature, high humidity, relatively high irradiation and frequently high levels of dust deposition. Each PV panel of 150 W rating was feeding a variable resistive load. The measurement was taken through a conditioning amplifier and Profi-Cassy analog to a digital converter. Cassy System displayed the voltage, the current, the delivered power and the irradiation on-line with the desired frequency of measurement and storage rate. I-V and P-V characteristics were accurately displayed and stored. Cassy environment allows appending the characteristics for the sake of comparison, investigation and research purposes. The obtained results were validated against simulation to show a very good degree of accuracy. Cassy System environment has shown high degree of simplicity and flexibility in programming, to record and display a large number of variables manually and automatically. The measurement system has shown clearly the impact of dust, of high temperature and of the irradiation changes on the PV panel efficiency certifying his candidacy for research and educational purposes.