Clearance identification protection method based on millimeter wave radar ranging

By installing millimeter-wave radar on the wind turbine and adopting hierarchical early warning measures, the problems of high installation cost, difficulty and high false alarm rate of blade clearance detection in the prior art are solved, and more efficient and accurate clearance monitoring and protection are achieved.

CN119712452APending Publication Date: 2025-03-28GUOHUA (URATHOUQI) WIND POWER CO LTD
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Patent Information

Application Number
CN202411697366.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art has problems such as high installation cost, high installation difficulty and high false alarm rate in the blade clearance detection, and it is impossible to effectively identify and deal with changes in the blade clearance of the wind turbine set.

Method used

The clearance recognition and protection method based on millimeter-wave radar is adopted, and the millimeter-wave radar is installed at the intersection of the bottom of the cabin and the wheel hub. The clearance monitoring is carried out using three millimeter-wave radar beams of different angles, and hierarchical early warning and hierarchical response measures are adopted.

Benefits of technology

It reduces installation difficulty and cost, improves the accuracy and efficiency of headroom monitoring, reduces false alarm rates, and enhances the protection capability of wind turbines.

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Abstract

The invention provides a clearance recognition protection method based on millimeter-wave radar ranging, which comprises the following steps: firstly, mounting a millimeter-wave radar in an area at the intersection of the bottom of a cabin of a wind generating set and a hub, and then transmitting three millimeter-wave radar beams at different angles by the millimeter-wave radar, the three millimeter wave radar beams correspond to three clearance over-limit thresholds; calculating according to the unit parameters to obtain a clearance over-limit threshold value; and the millimeter wave radar collects and calculates the real-time clearance values of the three blades in real time, the real-time clearance values of the three blades are compared with the three clearance over-limit thresholds in sequence, and according to the comparison result, graded alarming and graded treatment are performed. According to the invention, the millimeter wave radar is directly installed in the area at the junction of the cabin and the bottom and the hub, thereby facilitating the installation and debugging, and reducing the installation difficulty and installation cost. And meanwhile, grading early warning and grading coping are carried out by adopting multiple threshold values, so that the probability of false alarm is reduced, and the protection of the wind turbine generator is more efficient and more accurate.
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