Draught fan foreseeable yaw control system based on imminent prediction

Abstract

The invention relates to the technical field of wind power generation yaw, in particular to a draught fan foreseeable yaw control system based on imminent prediction. The system comprises an anemorumbometer, a prediction module, a yaw counter, a master controller, a yaw frequency converter and a yaw encoder. The anemorumbometer and the prediction module are in signal connection with the master controller. The output end of the master controller is connected with the yaw control frequency converter, a yaw motor and a wind driven generator in sequence. The output end of the yaw motor is in signal connection with the master controller through the yaw counter. The wind driven generator is in signal connection with the master controller through a yaw decoder. According to the draught fan foreseeable yaw control system based on imminent prediction, the active type intelligent yaw system is achieved based on a wind speed and direction ultra-short-term prediction model; analogue control can be achieved and the problem that generated energy is affected due to shutdown is avoided even on the condition that anemorumbometer is damaged.

Description

technical field [0001] The invention relates to the technical field of wind power generation yaw, in particular to a wind turbine predictive yaw control based on near prediction. Background technique [0002] The yaw system of a traditional wind turbine is a passive follow-up system based on wind direction. The wind direction signal collected by the wind speed and direction instrument on the nacelle is transmitted to the main PLC of the wind turbine through the 485 communication protocol, and the 10-minute average wind direction is calculated. The absolute value comparison of the yaw angle data collected by the yaw counter, when the yaw angle difference is greater than 30°, it will be used as an output yaw action command to drive four yaw motors (with power-off brake), and the impeller will face Adjust the yaw in the direction of the wind, and record the current adjusted angle. If the wind angle of the impeller is within the range of +-8°, the yaw will stop, and the main con...

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: in order to overcome the problem that the acquisition and calculation of the wind direction in the prior art requires a certain amount of time, and the change of the real-time wind direction cannot be accurately controlled, a predictive yaw control of wind turbines based on near prediction is provided. , by setting up a prediction module for ultra-short-term prediction of wind speed and direction signals, it is possible to realize analog control in the case of damage to the fan anemometer without stopping the machine and affecting the power generation

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