SYSTEM OF USE OF ENERGY STORED IN THE MECHANICAL INERTIA OF THE ROTOR OF A WIND TURBINE.

摘要

System for harnessing the energy stored in the mechanical inertia of the rotor of a wind turbine. It allows the mechanical energy stored in a rotating element to be used to contribute to the dynamic stability and control of the frequency of the network to which said rotating element is coupled. The main field of application of this invention is that of wind turbines where the inertial energy stored in the rotor of said wind turbines can be harnessed. Two back-to-back power converters, a rectifier (4) and an inverter (6) with a control system (16) that generate the Topt reference torque guarantee an optimal energy capture for any wind speed participate in it . The system adds two torque components: the first DTf to the output of the control block (20) in order to ensure that the frequency of the distribution network follows a reference. The second torque component generated by the control block (18) calculates the increase in DTi torque, whose purpose is to contribute to the improvement of the dynamic stability of the distribution network by providing the system with an inertial torque similar to the equivalent inertial power of a synchronous generator connected to the distribution network of a conventional generation plant. As a result, the reference torque Tref is obtained, which is the torque setpoint that the rectifier circuit (4) must follow so that the generator's electrical torque (3) follows this reference and the control objectives are met.