Wind speed information processing method, wind speed information processing device, variable-pitch control method, variable-pitch control device and variable-pitch control system

Abstract

The embodiment of the invention provides a wind speed information processing method, a wind speed information processing device, a variable-pitch control method, a variable-pitch control device and a variable-pitch control system. The variable-pitch control method comprises the following steps: acquiring the current wind speed change data of the weather side of a wind generator set; determining whether the wind speed change of the wind generator set is matched with the current wind speed change of the weather side or not according to the wind speed data measured by the wind generator set; and if the wind speed change of the wind generator set is matched with the current wind speed change of the weather side, and the current rotational speed is within a predetermined rotational speed range, carrying out variable-pitch control on the wind generator set according to the current wind speed change data of the weather side. With the adoption of the embodiment of the invention, control for the rotational speed of the wind generator set can be more stable, the load of the wind generator set is effectively reduced, and the generating efficiency is increased; and moreover, requirements on the measurement accuracy and the installation position of a wind speed sensor are avoided.

Description

technical field [0001] The invention relates to wind power generator technology, in particular to a wind speed information processing method and device, and a pitch control method, device and system. Background technique [0002] With the continuous increase of wind power generation capacity, the type and control mode of wind turbines have developed from a single fixed pitch control to variable pitch control and variable speed control. How to ensure the efficient and stable operation of wind turbines has become an important content to be solved in wind power technology. [0003] The operating area of ​​variable pitch wind turbines is generally divided into four operating areas: start-up area, constant Cp area, constant speed area, and constant power area. In the three operating areas of starting area, constant Cp area, and constant speed area, the main control system will control the blades to open to an angle of 0 degrees, and there is no need to perform propeller control ...

AI Technical Summary

Problems solved by technology

Due to the high blindness of wind speed prediction based on weather forecast information, the predicted wind speed data is inaccurate, and it is difficult to use it as the basis for pitch control; while for the method of measuring the current wind speed through wind speed sensors, if the wind speed If the sensor is installed on the pitch wheel hub, since the pitch wheel hub is rotating, the installation of the wind speed sensor is more difficult, and if the wind speed sensor is installed at the tail of the nacelle, the measurement distance of the wind speed sensor needs to be longer, usually using laser Anemometer, but not suitable for a single wind turbine due to its large size

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