Fan hub center constant-current hot-wire wind speed sensing system and method

Abstract

The invention discloses a fan hub center constant-current hot-wire wind speed sensing system and method, and belongs to the technical field of wind power generation. A constant-current hot-wire probe is fixed on the front end surface of a fairing and is exposed out of the front end surface of the fairing; and the constant-current hot-wire probe is connected with a probe temperature sensor, the probe temperature sensor is connected with a temperature signal collector, the constant-current hot-wire probe and the temperature signal collector are respectively connected with current shunts, the current shunts are respectively connected with a constant-current power supply and a signal conversion controller, and the signal conversion controller is connected to an SCADA system. According to the fan hub center constant-current hot-wire wind speed sensing system and method, the design is reasonable, the total cost is low, and the installation method is simple; the advantages of small geometric dimension, small thermal inertia, high response frequency, continuous measurement, high spatial resolution, small interference on a measurement flow field and the like of a hot-wire anemograph are fully exerted, the wind speed can be accurately measured, and the interference of wind wheel rotation on wind speed measurement is effectively avoided; and meanwhile, measured data can be used for correcting and checking the traditional anemograph.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a wind speed sensing system and method for a constant-flow hot wire at the hub center of a fan. Background technique [0002] At the current stage, the wind speed data of a single wind turbine mainly relies on the anemometer (such as a cup-type anemometer) installed above the nacelle, combined with the measurement of wind direction for yaw and pitch control. Accurate measurement of wind speed is the prerequisite for efficient and stable operation of wind turbines. [0003] However, for wind turbines operating in the upwind direction, the wind measuring device installed above the nacelle is inevitably affected by the blades of the fan: the rotating blades will generate a wake, which affects the instantaneous flow field distribution above the nacelle, resulting in traditional measurement There will be deviations between the measurement results of the wind...

AI Technical Summary

Problems solved by technology

[0003] However, for wind turbines operating in the upwind direction, the wind measuring device installed above the nacelle is inevitably affected by the blades of the fan: the rotating blades will generate a wake, which affects the instantaneous flow field distribution above the nacelle, resulting in traditional measurement There will be deviations between the measurement results of the wind device and the real incoming flow in front of the wind rotor

Images