Online state identification method and device for variable pitch execution mechanism of wind generating set

A technology of wind turbines and actuators, applied in measuring devices, computer control, instruments, etc., can solve problems such as inability to extend self-identification methods, loss of power generation, and unsustainability

Pending Publication Date: 2021-09-14
XINJIANG GOLDWIND SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the above identification methods have the following limitations: (1) there are certain requirements for the wind conditions, (2) there is a certain angle range limit for the pitch angle to be identified, (3) the quality of the identification results depends to a certain extent Based on the engineer's experience, (4) the identification operation needs to be carried out after the shutdown operation, and the shutdown will introduce a certain degree of loss of power generation, and (5) limited by the excitation signal, it cannot be extended as an online autonomous identification method. Persistent

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  • Online state identification method and device for variable pitch execution mechanism of wind generating set
  • Online state identification method and device for variable pitch execution mechanism of wind generating set
  • Online state identification method and device for variable pitch execution mechanism of wind generating set

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Embodiment Construction

[0024] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of embodiments of the present disclosure as defined by the claims and their equivalents. Various specific details are included to aid in understanding but are to be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the disclosure. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0025] The online state identification method of the pitch actuator of the wind power generating set disclosed herein can be embedded as a program into the controller of a single wind generating set for real-time online state identification, and can also be set at the field end or cloud for offline state identification operations, and No addition...

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Abstract

The invention provides an online state identification method and device for a variable pitch execution mechanism of a wind generating set. The method comprises the following steps: acquiring a pitch angle given value and a pitch angle measured value of a variable pitch execution mechanism within a specific time period in a specific sampling period; calculating the obtained pitch angle given value and the pitch angle measured value to obtain parameters of a transfer function between the pitch angle given value and the pitch angle measured value of the variable pitch execution mechanism; and carrying out online state identification of the variable pitch execution mechanism by using the parameters.

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 method and device for online status identification of a pitch actuator of a wind power generating set. Background technique [0002] During normal operation of wind turbines, especially under normal power generation conditions, the aerodynamic performance of the wind turbine is mainly controlled by adjusting the pitch angle, so as to capture wind energy for power generation. In the process of starting and stopping, it is necessary to cooperate with the unit to realize the switching of different working points and the safety protection of the unit through the action of opening and closing the propeller. The pitch actuator is an extremely important part of the wind turbine control system, and its dynamic response characteristics directly affect the power generation, load intensity and system safety of the wind turbine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042G01D21/02
CPCG05B19/0428G01D21/02G05B2219/2612
Inventor 薛达李永明
Owner XINJIANG GOLDWIND SCI & TECH
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