Fault detection method and device for speed sensor of wind power generating set

Abstract

The invention discloses a fault detection method of rotation speed sensors of a wind power generation unit and a device thereof. The fault detection method comprises the following steps: obtaining measurement rotation speeds of multiple rotation speed sensors of the wind power generation unit; obtaining predicted rotation speeds of the rotation speed sensors at the current moment according to measured rotation speeds of the rotation speed sensors at N moments before the current moment, wherein N is an integral number being greater than or equal to 0; and determining operation states of the rotation speed sensors according to difference values between the predicted rotation speeds of the rotation speed sensors at the current moment and the measured rotation speeds. Through adoption of the technical scheme of the embodiment, abnormal rotation speed sensors can be accurately identified, so that the influence of measurement data of the abnormal rotation speed sensors on control of the rotation speed of the wind power generation unit is avoided, the rotation speed fault halt frequency caused by misjudgment of the rotation speed is reduced, and the loss of power generation amount of thewind power generation unit is reduced.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a fault detection method and device for a speed sensor of a wind power generating set, and a storage medium. Background technique [0002] Wind turbines generally have multiple speed sensors, and the measurement principles of these devices are different. Utilizing the measured speeds of multiple speed sensors to coordinate the operation of wind turbines can improve the reliability of wind turbines. At present, the speed fault protection strategy of wind turbines is: when any speed exceeds the fault threshold, the wind turbine will trigger the impeller over-speed fault and shut down; when the difference between any two measured speeds exceeds the set safety threshold, the wind power The generator set will trigger a speed comparison fault and stop. [0003] In the prior art, the above-mentioned fault protection strategy is implemented mainly through the rotational sp...

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Problems solved by technology

[0003] In the prior art, the above-mentioned fault protection strategy is implemented mainly through the rotational speed data directly measured by the rotational speed sensor, but in actual operation, a certain rotational speed sensor among the multiple rotational speed sensors may fail or have unstable performance, resulting in the existence of measurement data. Abnormal data or data jumps affect the correctness of the wind turbine control speed, resulting in an increase in the frequency of speed failure shutdowns due to misjudgment of speed failures, resulting in a large loss of power generation for wind turbines

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