Implementation and control of distributed maximum power point tracking in solar photovoltaic applications

solar photovoltaic;maximum power point tracking;distributed power electronics;multiphase converter;dc-dc buck converter;interleaving;ripple cancellation

Schuck, Marcel ; Pilawa-Podgurski ; Robert C.

关键词: solar photovoltaic;    maximum power point tracking;    distributed power electronics;    multiphase converter;    dc-dc buck converter;    interleaving;    ripple cancellation;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/44124/Marcel_Schuck.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Maximum power point tracking (MPPT) is an important feature in solar photovoltaic (PV) systems as it increases the energy yield from such systems by optimizing their operating point. Current state-of-the-art solutions perform MPPT for a whole system, a string of panels or an individual panel within a PV system. This results in a loss of energy when the optimal operating point varies among different units. In this thesis, the implementation of MPPT on the sub-panel level is presented. This enables increased energy output under mismatched conditions (e.g. due to partial shading) across the system. Three centrally controlled dc-dc buck converters with series connected outputs are implemented and tested.As the maximum power point (MPP) of panel sections may vary, the proposed multiphase converters operate under asymmetric conditions. Therefore, a control technique to minimize the output current ripple under these conditions is mathematically derived and verified through simulations and experimental measurements.