A cost-effective method for PV module field test using an electronic load

To analyze the electrical performance of individual PV modules in the field, I-V curve tracers or micro inverters are typically used with the associated shortcomings. In this study, we used a precision electronic load to analyze the electrical performance of individual PV modules. The electronic loads have been used for empirical field studies on 12 PV modules installed in Hyundai Heavy Industries test site (Eumseong factory). Three sets of the electronic loads and controllers have been installed, with each set capable of handling 4 PV modules in a time-divided manner. The main advantages of the electronic load are its low price, high precision, wide input ranges for voltage, current and power, and easy control by electrical communication. Initially, the biggest drawback of the electronic load was the slow control speed, but we resolved the issue by applying a new tracking algorithm.