Blade collection system and blade collection method of wind generation set

Abstract

The invention relates to a blade collection system and a blade collection method of a wind generation set. The blade collection method of the wind generation set comprises the steps as follows: 1), whether the wind generation set is stopped for collecting blades in emergency is judged; 2), when the wind generation set is stopped for collecting blades in emergency, blade collection is controlled to be performed according to a preset curve; when the wind generation set isn't stopped for collecting blades, a blade pitch angle is compared with a preset switching angle; when the blade pitch angle is smaller than the switching angle, blades are collected to the preset switching angle in a normal blade collection manner, and then blade collection is controlled according to the preset curve until a blade collection process ends; and when the blade pitch angle is larger than the switching angle, blade collection is controlled according to the preset curve until the blade collection process ends. At the final stage of the non-emergency stopping and blade collection, open-loop control blade collection is performed according to the preset curve, so that the reliability and the safety of the blade collection control of the wind generation set are further improved.

Description

Technical field [0001] The invention relates to a wind turbine retracting propeller system and a retracting method. Background technique [0002] With the rapid development of the wind power industry, variable-pitch wind turbines are also moving towards megawatts and large-scale development. At the same time, wind turbines have higher and higher requirements for the safety and reliability of the system. As the first-level protection of the wind turbine safety system, the pitch system becomes particularly important for its control. In the control of the pitch system, the control of the propeller, which is related to the safety and smooth shutdown of the wind turbine, is the most critical. [0003] At present, the retraction control of the pitch system can generally be divided into three situations: one is the normal shutdown and retraction, such as the shutdown of the wind speed is too low or manual shutdown, etc., this type of shutdown is the main control PLC sending speed and pos...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a system and a method for retracting propellers of wind turbines, which are used to solve the problem that the reliability and safety of wind turbine operation are affected due to the main control system participating in the final stage of retracting the propellers during the process of retracting the propellers.

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