Pitch control method and system for wind power generating set

Abstract

Embodiments of the present invention provide a pitch control method and system for a wind power generating set, the method comprising: the main controller of the wind generating set predicts the pitch control data of each control cycle within a preset period of time in advance; the main controller Generate the corresponding predicted pitch control command according to the pitch control data, and send the predicted pitch control command to the pitch controller, so that the pitch controller can store it in the order received; if the conductive slip ring communication is interrupted, the pitch control The controller sequentially executes the predicted pitch control instructions according to the storage order of the predicted pitch control instructions, so as to perform the pitch operation. Since the pitch control command within the preset period of time is stored in advance, even if the conductive slip ring communication is interrupted, the blades can be controlled to perform the pitch operation according to the stored pitch control command, which can avoid unnecessary failure of the wind turbine generator. Shutdown improves the power generation of the wind turbine.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wind power generation, and in particular to a pitch control method and system for a wind power generating set. Background technique [0002] A wind turbine is a device that converts wind energy into electrical energy. In the control of wind turbines, pitch control is the main link. In the wind turbine, since the hub of the pitch system rotates with the impeller, while the nacelle is fixed, the conductive slip ring is one of the indispensable components in the wind turbine. [0003] The conductive slip ring is a precision power transmission device that transmits electrical signals between the rotating part of the fixed frame and the rolling or sliding part by using the sliding contact, electrostatic coupling or electromagnetic coupling of the conductive ring. In wind turbines, since conductive slip rings need to transmit more than a dozen different electrical signals, such as high-f...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a pitch control method and system of a wind power generating set, which solves the problem that in the pitch control method of a wind power generating set in the prior art, after a fault is caused by a communication interruption of the conductive slip ring, only shutdown processing can be performed. To ensure the safety of wind turbines, resulting in unnecessary shutdown of wind turbines and technical problems that affect the power generation of wind turbines

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