A tower load monitoring method for a wind power generating set

Abstract

The invention discloses a tower load monitoring method of a wind power generating set, which is based on the principle: when the wind power generating set is in the standby state of small wind, the load received by the tower mainly comes from the gravity of the nacelle and blades, etc. , the tower load will form a relatively regular sine wave signal, and the loads corresponding to different nacelle azimuth angles are constant, that is, when the wind turbine is shut down after running for a period of time, and the wind speed is basically the same as the wind speed at the time of yaw, The load value of the tower can be calculated according to the azimuth angle of the nacelle; the strain gauges need to be installed on the inner wall of the tower before implementing this method. The present invention can automatically judge whether the signal has drifted through the first calibration, and if there is drift, it can continuously and automatically correct the subsequent signals without multiple calibrations and personnel intervention, which can save a lot of labor costs, and automatically The correction is also completed in a small wind standby state, which does not affect the power generation of the wind turbine at all.

Description

technical field [0001] The invention relates to the technical field of tower load monitoring of a wind power generating set, in particular to a tower load monitoring method of a wind power generating set. Background technique [0002] As is known in the industry, wind turbines are large and complex mechanical components. In order to ensure safety, real-time load monitoring is required, for example, to monitor the load of the tower and blades. Personnel rushed to the scene in time to check the abnormal situation to ensure the safe operation of the unit. [0003] Load monitoring generally uses sensors such as strain gauges or optical fiber strain gauges. The sensors are installed on the inner wall of the tower and at the root of the blades. The load signal is connected to the control system of the wind turbine. When the sensor is just installed, signal calibration is required to determine the electrical signal. Conversion relationship between load values. The calibration of ...

AI Technical Summary

Problems solved by technology

[0007] 1. The signal drifts irregularly and the staff cannot know it, resulting in inaccurate monitoring values ​​and affecting judgment. Either the power generation is lost due to false alarm shutdown, or the failure to alarm due to the alarm brings operational risks

[0008] 2. The labor cost of multiple calibrations is very high

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