Photovoltaic system and method for operating a photovoltaic system

A photovoltaic system comprising:

• a plurality of photovoltaic modules;
• a DC motor having an input electrically connected to the photovoltaic modules and receiving from the photovoltaic modules a DC voltage and a DC current;
• an AC generator driven by the DC motor via a shaft and producing an AC output voltage capable of being supplied to a power mains;
• a first control unit having two inputs and an output, wherein the first input receives the DC voltage from the DC motor;
• and
• a computing unit having a first input receiving the DC voltage from the DC motor and an output producing an output signal, which is iteratively computed and adjusted by the computing unit in accordance with a maximum permissible peak power for a current incident solar radiation intensity and a current ambient temperature and supplied to the second input of the first control unit,
• wherein in response to the signals received at the first and second input, the first control unit produces at the output an output signal which causes an excitation field of the DC motor to change, so that the DC motor generates the maximum permissible peak power.