Abstract: The output power of photovoltaic（PV）cells is determined by the external environment and the load.In order to enhance efficiency,the maximum power point tracking（MPPT）control must be employed.A PV energy conversion system was discussed,which consisted of a buck-boost converter and an MPPT controller based on Incremental Conductance（IncCond）algorithm.The simulation study under PSIM and LabVIEW showed that this method was able to keep the PV system working at the maximum power point and to respond ...