Control method, system, and generator set for extreme yaw conditions of wind power generating set

Abstract

The invention discloses a method, system and generator set for controlling extreme yaw conditions of a wind power generating set, which can monitor the working current of the yaw motor in the yaw system in real time through the existing monitoring device of the wind generating set, and the pitch control system. Pitch angle, determine whether the operating current is greater than the preset maximum threshold, if not, continue to monitor the operating current and pitch angle, otherwise, execute the control program, according to the preset incremental angle, until the yaw motor is monitored When the working current is less than the preset minimum threshold, the execution of the control program is stopped. Through the pitch system, the pitch angle is gradually increased to reduce the unbalanced load of the blades, thereby reducing the resistance of the yaw action, and then reducing the current of the yaw motor, so that the working current of the yaw motor is within a reasonable range and does not occur Downtime.

Description

technical field [0001] The invention relates to the technical field of wind power engine control, in particular to a control method, system, and generator set for extreme yaw conditions of a wind power generating set. Background technique [0002] The yaw system is an important part of the wind turbine. Its function is to quickly and smoothly align the wind direction when the direction of the wind speed vector changes, so that the wind rotor can obtain the maximum wind energy. Due to the complex and changeable natural environment, when the wind turbine enters the yaw state, the yaw system needs to deal with various extreme working conditions. However, in order to save the manufacturing cost of the wind turbine, the yaw system must It is impossible to deal with all extreme working conditions. Especially in the state where the wind direction of the wind field is disordered and there is a large turbulent flow, the force acting on the blade will be unbalanced. [0003] This ki...

AI Technical Summary

Problems solved by technology

Due to the complex and changeable natural environment, when the wind turbine enters the yaw state, the yaw system needs to deal with various extreme working conditions. However, in order to save the manufacturing cost of the wind turbine, the yaw system must It is impossible to deal with all extreme working conditions

Especially in the state where the wind direction of the wind field is turbulent and there is a large turbulence, the force acting on the blade will be unbalanced

[0003] This kind of force imbalance is particularly obvious on long-blade units, which will generate an additional moment that is the same as or opposite to the yaw direction (that is, the direction of rotation of the nacelle), and this additional moment will bring additional load to the yaw system, making The load of the yaw system is too large, which causes the working current of the yaw motor of the yaw system to be too large during the yaw process, causing the system to report a yaw overload fault, causing the unit to stop and the power generation of the unit to be lost

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