Independent variable-pitch control method and variable-pitch comprehensive monitoring method and system for wind turbine generator

Abstract

The invention discloses an independent variable-pitch control method for a wind turbine generator. The independent variable-pitch control method comprises the following steps of monitoring current information of a variable-pitch motor of the wind turbine generator in real time, and calculating to obtain load data of single paddles according to the detected current information in combination with blade position state, impeller position state and fan operation state information; and enabling a main controller of the wind turbine generator to send an instruction to a variable-pitch driver according to the obtained load data of the single paddles, so that the variable-pitch driver controls the single paddle to complete independent variable-pitch actions. The invention further discloses an independent variable-pitch comprehensive monitoring method and system of the wind turbine generator. According to the independent variable-pitch control method and the variable-pitch comprehensive monitoring method and system, the condition of the electric driving current of the variable-pitch motor is acquired in real time, load calculation is carried out by combining relative position information ofan impeller and the paddles, the function of monitoring and identifying the motor load of the single paddles is realized, the independent variable-pitch control over the paddles is conveniently and accurately realized, the unit load is reduced, and the unit efficiency is improved. By means of the independent variable-pitch control method and the variable-pitch comprehensive monitoring method andsystem, the functions of paddle damage diagnosis, paddle icing monitoring, fan overspeed protection, fan vibration monitoring and environment monitoring are further achieved.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method for controlling independent pitch of wind turbines and a method and system for comprehensive monitoring of pitch. Background technique [0002] The pitch system is an important part of the wind turbine. It is the "adjustment switch" for the energy input of the wind turbine, and its performance directly affects the safety performance of the wind turbine. With the enlargement of wind turbines, the increasing blades and loads put forward higher requirements for the safety performance of the pitch system. Comprehensive and comprehensive monitoring of the pitch system and related components of low wind speed wind turbines is a key measure to ensure the safety of wind turbines and increase power generation. The existing pitch system has a single function and cannot perform comprehensive comprehensive monitoring. [0003] In addition, the traditional independent pitch cont...

AI Technical Summary

Problems solved by technology

The existing pitch system has a single function and cannot perform comprehensive comprehensive monitoring

[0003] In addition, the traditional independent pitch control system (IPC) needs to know the force of the blade under different conditions. The method adopted is: install the blade stress measurement equipment at the blade root to monitor the blade load in real time. This method exists in the equipment High cost, short life of stress sensor, difficult maintenance, etc.

[0004] It can be seen that the above-mentioned existing independent pitch system obviously still has inconvenience and defects in structure, method and use, and needs to be further improved urgently.

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