Investigation of distributed maximum power point tracking systems through the use of an outdoor test rig and computer model

Previous analyses have been done on the power recovery of DMPPT systems, but literature has reported a lack of detailed transient analysis. In this study, an investigation is being carried out into the interactions and stability of systems that use multiple maximum power point tracking devices when subjected to transient events. A test rig has been developed to allow testing both with and without per-module converters through the use of a switch. The tests are ongoing on days with suitable weather conditions. A Simulink/PSpice SLPS model of the test rig is also being developed and will be verified using the data taken from the tests. The model will be adapted to look at other system configurations. The investigation will show if and when DMPPT has a negative effect.