An ipc control method for reducing vibration and load in the left and right direction of wind power tower

Abstract

The invention discloses an IPC control method for reducing side-side direction vibration and load of a wind power tower barrel. According to the method, a side-side direction acceleration signal of anunbiased engine room is compared with a target value of the side-side direction acceleration signal of the engine room after being filtered by a notch filter and a band-pass filter, the deviation ofthe side-side direction acceleration signal and the target value is processed by a PI controller to obtain a given value of a d-axis variable pitch speed in a dq rectangular coordinate system, and thegiven value of the q-axis variable pitch speed is set in advance; the given value of the d-axis variable pitch speed and the given value of the q-axis variable pitch speed are subjected to integral operation to obtain a given value of a d-axis variable pitch position and a given value of a q-axis variable pitch position respectively; the PI controller is used for acquiring a given value of a uniform pitch position in a power generation mode of a wind generating set, and an absolute value encoder is used for acquiring an azimuth angle of an impeller in the power generation mode of the wind generating set; and through the Park inverse transformation from the dq rectangular coordinate system to a rotating coordinate system, the given values of the variable pitch positions of three blades areobtained, and finally implemented by a variable pitch actuator. The method can effectively reduce the first-order natural frequency vibration and load of the tower barrel in the side-side direction.

Description

technical field [0001] The invention relates to the technical field of control systems of wind power generating sets, in particular to an IPC control method for reducing vibration and load in the left and right directions of a wind power tower. Background technique [0002] It is known in the industry that offshore large-capacity single-pile foundation wind turbines are subject to wind loads and wave excitation loads at the same time. When using Bladed software to calculate the load of mechanical components, usually the wind direction and the wave direction will be set with different angles from 0 to 90 degrees, that is, the wind direction and the wave direction are not in the same direction most of the time. In addition, different values ​​​​will be set for the height of the waves. [0003] As the angle between the wind direction and the wave direction increases, the waves will excite the side-side vibration of the tower. However, the side-side aerodynamic damping of the ...

AI Technical Summary

Problems solved by technology

However, at this time, the electromagnetic torque of the generator above the rated wind speed and the output power of the fan will show a large fluctuation in the first-order natural frequency of the tower.

Images