System for producing electric power from renewable sources and a control method thereof

A system for generating electric power, comprising:

• an electric-power source, having a preferential point of operation, correlated to at least one variable parameter that can vary as a function of at least one non-controllable event;
• a double-stage inverter having an output coupled to an electrical power network and further comprising as a first stage a DC/DC boost converter, controlled via a control parameter, and as a second stage a DC/AC inverter;
• a block for identifying the preferential point of operation, said block supplying a reference signal according to the conditions of operation of said electric-power source and to the preferential point of operation of said electric-power source;
• a corrector block comprising a compensator effective to set the control parameter for the boost converter as a function of an error signal generated by a comparison of said reference signal and a signal of actual operation of said electric-power source, wherein said electric-power source is maintained in the proximity of the preferential point of operation;
• and
• the boost converter effective in response to the control parameter to suppress or reduce an effect on said reference signal and said variable parameter of at least one disturbance at a pre-determined frequency coming from the electrical network to which the output of said inverter is connected.