Pitch control method, controller and control system for wind power generating set

Abstract

The present disclosure provides a pitch control method, a controller and a control system of a wind power generating set. The pitch control method includes: performing data interaction between pitch controllers of the wind power generating set; judging whether a single-axis communication fault occurs in the wind generating set, and the single-axis communication fault is caused by the main control controller of the wind generating set and Communication failure between one pitch controller; after determining a single-axis communication failure of the wind turbine, the pitch controller with a single-axis communication failure sets the speed value sent to the other pitch controller as an abnormal value, And judge whether the speed value received from other pitch controllers is within the preset normal speed range; when the received speed value is within the preset normal speed range, the pitch control with single-axis communication failure will The controller performs a pitch operation according to the received speed value.

Description

technical field [0001] The present disclosure relates to the technical field of wind power generation, and more specifically, the present disclosure relates to a pitch control method, a pitch controller, and a pitch control system of a wind power generating set. Background technique [0002] A wind turbine is a device that converts wind energy into electrical energy. The wind energy drives the main shaft, speed-up box, and generator through the impeller to convert it into electrical energy, and then transmits the electrical energy generated by the wind turbine to the grid through grid-connected control. Therefore, grid-connected control is An important part of wind turbine control. [0003] The conductive slip ring is a precision power transmission device that transmits electrical signals and electric energy between the rotating parts of the fixed frame and the rolling or sliding parts by using the sliding contact, electrostatic coupling or electromagnetic coupling of the co...

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Problems solved by technology

[0006] However, from figure 1 It can be seen from the figure that if the pitch controller 101 wants to control the operation of the pitch driver 102 and make the pitch driver 102 drive the pitch motor 103 to run, it needs to send the speed command and the enable signal at the same time. Once the pitch controller 101 and the main control After the communication of the conductive slip ring 106 between the controllers is interrupted, the two signals of the speed command and the enable signal will become 0 or have no output value. At this time, the pitch driver 102 cannot operate normally because it cannot receive the operation command. pitch control

[0007] At present, for the communication failure caused by the interference of the conductive slip ring, the wind turbine can only ensure the safety of the wind turbine through shutdown operation, that is, after the main control system detects the communication error of the conductive slip ring, it will immediately execute the shutdown of the propeller. To ensure the safety of wind turbines, but this may lead to unnecessary shutdown of wind turbines, affecting the power generation of wind turbines

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