Wind turbine independent pitch control method and pitch comprehensive monitoring method and system

Abstract

The invention discloses a method for controlling the independent pitch of a wind turbine. The method comprises: monitoring the current information of the pitch motor of the wind turbine in real time; The load data of a single blade is calculated; the main controller of the wind turbine sends an instruction to the pitch driver according to the load data of a single blade, so that it can control a single blade to complete an independent pitch action. Also disclosed are a comprehensive monitoring method and system for independent pitch adjustment of wind turbines. The present invention utilizes the real-time collection of the electric drive current of the pitch motor, and combines the relative position information of the impeller and the blade to calculate the load, and has the function of monitoring and identifying the motor load on a single blade, which facilitates the accurate realization of the independent pitch control of the blade. Reduce unit load and improve unit efficiency. The invention also has the functions of blade damage diagnosis, blade icing monitoring, fan overspeed protection, fan vibration monitoring and environment monitoring.

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.

Images