Patent ID: RE43719

Claim:
A method of matching the a power of a photovoltaic system producing electric energy by which a working point at which the system produces maximum power is set by changing the working point in an MPP matching process and by comparing the system power, which changes as a result thereof, characterized in that at least one additional control step or control cycle is performed for detecting an external meteorological impact on a photovoltaic generator that causes a sudden strong reduction in sun irradiation, whereby the control step or control cycle is performed so that a past working point is set as reference working point to check through the at least one additional control step or control cycle whether an assumed maximum power point indeed corresponds to the an actual maximum power point, so that it can be checked if a non stationary characteristic curve exists, and that said at least one control step or said at least one control cycle is integrated in said MPP matching process, it being checked in wherein the at least one control step or in the at least one control cycle is configured to check whether the generator characteristic curve has changed under the meteorological impact during one MPP matching cycle and a new working point being is set in at least one correction step or in at least one correction cycle as a function of the change in position of one reference point so that during the MPP matching process the power point changed under the impact of external meteorological conditions is tracked so as to set a working point at which the system produces more power.