Active yaw control method for wind generating set and controller

Abstract

The invention discloses an active yaw control method for a wind generating set and a controller. The method is used for the center controller and comprises the steps that after it is detected that starting yaw of a first wind power generator exists in a wind power field, historical yaw data of the wind power yield are inquired under the situation that the first wind power generator serves as the wind power generator in earliest starting yaw under current wind situation data; and the passive yaw time difference value, relative to the first wind power generator, of each wind power generator is calculated according to the historical yaw data, and active yaw control instructions are sent to each wind power generator according to the passive yaw time difference value. According to the method, the wind situation does not need to be predicted, the distance between the wind power generators does not need to be detected, so that additional arrangement of additional sensor equipment is not needed, and the operating cost of the wind power field can be greatly saved.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to an active yaw control method and a controller of a wind power generating set. Background technique [0002] With the gradual expansion of the scale of wind turbines and the improvement of unit safety protection, the power generation performance of the operation of wind turbines, that is, improving the power generation and availability of wind turbines, has also received more and more attention. How to make full use of wind energy and obtain maximum energy and economic benefits has become a problem that the main control system of wind turbines must face. [0003] The yaw system is one of the essential components of the horizontal axis wind turbine. The yaw system, also known as the wind-facing device, is a part of the wind turbine nacelle. Its function is to quickly and smoothly align the wind direction when the direction of the wind speed vector changes...

AI Technical Summary

Problems solved by technology

[0004] At present, the control strategy adjustment and yaw of wind turbines are passive in nature, that is, the main control system starts to control the pitch system to perform the pitch change operation after the wind speed change is detected, and the blade pitch lags behind the wind speed change, resulting in the impeller speed not changing. stable, resulting in a certain loss of power generation; the main control system starts to control the yaw system to yaw after detecting a change in the wind direction, and the yaw action lags behind the change in the wind direction. loss of power generation

[0005] In addition, if the unit is in the shutdown state, when the main control system detects that the current wind speed is greater than the start-up wind speed, it needs to yaw to the wind first, and the time to yaw to the wind is generally longer, about 5 to 10 minutes or even longer, that is, After the wind speed of the wind farm reaches the start-up condition of the wind turbine, it may take about 12 to 15 minutes before it can be connected to the grid for power generation, which will cause a loss of power generation due to the slow start-up time of the unit: assuming that the wind farm has a total of 33 2MW (2000kW) units, Calculated at half the power, the loss of power generation within 10 minutes of yaw against the wind is about 2000kW×33 units×15 minutes / 60 minutes / 2=8250kW, resulting in a huge loss of power generation

The passive yaw of wind turbines may not cause much loss of power generation for a unit in a short period of time, but with the increase in the number of wind farms and the capacity of wind turbines, the loss of power generation caused by long-term operation is immeasurable

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