Reverse current simulation in PV array composed of different modules for interchangeability evaluation of thin film PV modules

摘要

We examine and quantify the influence of output difference in photovoltaic (PV) modules in a PV array on safety for standardization on interchangeability of PV modules. First, we modeled I-V characteristics of thin film PV module and maximum power point tracking operation of power conditioning system. Based on the experimental data, we verified validity on the modelling. Then, we simulated reverse current occurrence situation when changing a part of modules in an existing PV array with modules with different electric characteristics and clarified the range of rated value of the different module where reverse current did not occur quantitatively.