260 results about "Dc bus capacitor" patented technology

The invention discloses an internal potential response-based inertia control method and device for a full-power wind generator. When a full-power wind power generator system suddenly increases or reduces a load, a phase-locked loop cannot accurately lock the phase and the frequency of a power grid immediately by reducing the bandwidth of the phase-locked loop and changing the damping ratio of the phase-locked loop, so that a DC bus capacitor voltage correspondingly changes due to a sudden change of the power grid; a DC bus voltage is not adjusted to a reference value too fast by reducing the bandwidth of a DC bus voltage control loop and adjusting the damping ratio of a DC bus voltage loop; the inertia is shown for the power grid by a fast response of the DC bus voltage; difference operation is carried out on a DC bus measurement value and a DC bus voltage instruction value; the difference value is multiplied by a proportion coefficient to obtain an additional instruction; the additional instruction is added to a rotating speed loop to utilize rotation energy of a full-power wind generator set, so that the full-power wind generator set can provide an inertia support to the system. According to the internal potential response-based inertia control method and device for the full-power wind generator, a fast frequency and an acute change caused by a low rotational inertia of the system are avoided.