Internal potential response-based inertia control method and device for full-power wind generator

Abstract

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.

Description

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AI Technical Summary

Benefits of technology

This technology helps prevent damage caused by rapid variations or disturbances affects an AC electric machine's ability to react properly with changing electrical conditions. It involves controlling the output current from one part (the generator) based upon another part called the battery charger. When there are no problems with the load being driven through it, the motor operates more efficiently because less fuel needs to run during peak hours compared to when other parts have trouble doing their job well together. Additionally, if some problem arises while driving upgrades for new generators, the process automatically compensated increases efficiency without stopping production until they get back into operation again. Overall, these improvements improve the performance and durability of AC machines over longer periods of time than before any maintenance work was done.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance and reliability of fully-functional wind electricity generating systems due to their ability to operate at different frequencies depending upon varying loads caused by changes over time. Current methods have limitations such as slow response times and limited input/output capabilities.

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