Control method and device for power compensation of wind turbine generator set

Abstract

The invention provides a control method and device for power compensation of a wind turbine generator set. The control method comprises the steps that the current torque of the wind turbine generatorset is measured; the measured current torque is compared with a predetermined threshold value; whether the rated torque limiting value is updated or not is determined according to the comparison result; after the update of the rated torque limiting value is completed and the updated rated torque limiting value is maintained for a predetermined time, the rated torque limiting value is restored to be in the state before the update, wherein the predetermined threshold value is the product of the rated torque and a first coefficient, and the first coefficient is determined according to a predetermined fluctuation range of the current torque on the left side and the right side of the rated torque when the wind turbine generator set operates at the rated power. The control method can dynamicallyimprove the rated power, the load of the whole machine can be reduced, and the adaptability of electrical components of the wind turbine generator set is met.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, and more specifically, to a control method and device for flexible compensation of the power of a wind turbine. Background technique [0002] The wind power industry has developed rapidly in recent years, and its role in energy supply has become more and more significant. Wind power manufacturing enterprises and research institutes are constantly making the use of wind energy more and more effective through technological innovation. As the utilization of wind energy becomes more and more mature, it becomes a research direction to obtain wind energy under any different environmental conditions. [0003] In the prior art, the method of statically increasing the rated power limit is generally adopted to solve the problem of the power increase of the wind turbine before the rated wind speed. Once the limit is set, it cannot be changed. However, the one-time static increase of ...

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Problems solved by technology

However, the one-time static increase of the rated power limit is essentially to increase the capacity setting of the wind turbine generating set, so that the static increase of the rated power will inevitably increase the load of the whole machine, that is, increase the structural cost of the whole machine; in addition, the static increase of the rated power will inevitably increase Adaptability of electrical components, that is, increasing the electrical cost of the whole machine

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