A yaw control system for wind power generating set

Abstract

The invention discloses a yaw control system for a wind power generation unit. The yaw control system for the wind power generation unit comprises a wind velocity and direction sensor, a PLC and a yaw executing mechanism; the wind velocity and direction sensor acquires and transmits the wind velocity and wind direction to the PLC; the PLC determines that the yaw executing mechanism performs clockwise or anticlockwise yaw according to the wind velocity and the output power; a yaw system program is set in the PLC. In this way, the yaw control system can control whether a draught fan performs unwinding or not by judging whether the wind velocity reaches the starting wind velocity or not, and the draught fan cable can be protected on the premise that full power generation is guaranteed; the combination of automatic unwinding and manual unwinding is adopted to doubly protect the draught fan and decrease the frequency of forced stoppage; the control principle is simple, and the operation is convenient.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a yaw control system for a wind power generating set. Background technique [0002] With the development of the economy, the consumption of energy is increasing, and there is an urgent need for some emerging and renewable energy sources. At present, as a non-polluting, renewable and clean energy, wind energy has unique advantages in wind power generation. Wind turbines are power generating devices that convert airflow energy into electrical energy. Firstly, driven by the wind energy, the wind wheel of the wind turbine will rotate to obtain mechanical kinetic energy; secondly, the wind wheel drives the rotating motor, that is, the generator, to generate electrical energy. However, in the process of wind power generation, the wind direction changes randomly. In order to capture more wind energy, wind turbines must yaw against the wind. [0003] At present, the wind of the wind turbine...

AI Technical Summary

Problems solved by technology

If only the angle difference between the wind turbine and the wind direction is considered, when the wind turbine turns in the same direction for multiple turns, the transmission cable inside the wind turbine will be entangled, which will easily cause the wind turbine to fail

[0004] By setting the maximum number of deflection circles of the fan in the same direction to face the wind; when the number of deflection circles is less than the maximum, the fan will face the wind normally; The origin of the angle; and during the unwinding process of the fan, the wind energy will be lost due to shutdown for a long period of time. At the same time, more frequent startup and shutdown will increase the loss of the power components of the unit and reduce the service life of the unit

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