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Paddle operation interlocking method and device for variable-pitch system of wind generating set

A technology of wind power generating set and pitch control system, which is applied in the field of blade operation interlocking of pitch control system, and achieves the effects of simple structure, safe maintenance and operation, and simple and effective implementation method

Pending Publication Date: 2021-06-11
CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the pitch system is mostly 3-pitch cabinet type, and each pitch cabinet independently controls the corresponding fan blades. When maintaining the pitch system, the maintenance personnel will switch the pitch cabinet from "automatic operation mode" to "service "Maintenance mode", connect the manual operation box with the pitch control cabinet to complete the propulsion or feathering of the blades, which has the possibility of directly performing other blade propulsion operations without feathering after the propellers are propulsed. This is the root cause of the "4.12" fan tower collapse accident

Method used

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  • Paddle operation interlocking method and device for variable-pitch system of wind generating set
  • Paddle operation interlocking method and device for variable-pitch system of wind generating set
  • Paddle operation interlocking method and device for variable-pitch system of wind generating set

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Experimental program
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Effect test

Embodiment 1

[0035] The method for interlocking the operation of the blades of the wind turbine pitch system according to the present invention, the implementation steps are as follows:

[0036] First, if figure 1 As shown in , the communication between the three pitch cabinets in the pitch system is established, and the pitch position information of any two pitch cabinets in the pitch system is fed back to the third pitch cabinet in real time, and the third pitch cabinet is controlled by the main controller. Check whether the opening and feathering action of each blade is effective, so as to solve the problem of interlocking operation of the blades of the pitch control system. The process includes:

[0037] Its implementation steps are as follows:

[0038] (1) Set the pitch system "service maintenance mode" and "automatic operation mode":

[0039] In the "service maintenance mode", when using the pitch control box to change the pitch of any one blade, the other two blades must be in the...

Embodiment 2

[0047] The blade operation interlocking method of the wind turbine pitch system in this embodiment is different from Embodiment 1 in that it further:

[0048] Set the position flags of the three pitch control boxes m 1 、m 2 、m 3 , when the paddle operation box is in the inserted position, m 1 = m 2 = m 3 =1; when the propeller operation box is in the pull-out position, m 1 = m 2 = m 3 = 0;

[0049] When the position flag of the pitch control box is m 1 =0, blade 1 is forced to feather automatically; when the position flag of the pitch control box is m 2 =0, blade 2 is forced to feather automatically; when the position flag of the pitch control box is m 3 =0, blade 3 is forced to feather automatically. Make sure that after the pitch control box is pulled out from the pitch control cabinet, the blades should automatically retract to the feathered position.

Embodiment 3

[0051] The difference between the blade operation interlocking method of the pitch system of the wind power generating set in this embodiment and Embodiment 1 or Embodiment 2 is:

[0052] (1) In the initial state, the three propellers are all in the shutdown feathering position, and the propeller operation flag is a i = 0, the pitch control system is in the "automatic operation mode", the mode flag f of the pitch control mode is = 0, and any blade can be operated to open the propeller;

[0053] (2) When it is detected that there is and only the control mode of the jth blade control cabinet is "service maintenance mode", the controller updates the blade operation flag a j = 1, a i =0, where i≠j;

[0054] (3) When the propeller operation flag a is detected j = 1, a i =0, i≠j, the controller activates the blade operation enablement of the jth blade control cabinet, and at this time, the jth blade can perform the operation of opening and closing the blade;

[0055] (4) After ...

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Abstract

The invention discloses a paddle operation interlocking method and device for a variable-pitch system of a wind generating set. The paddle operation interlocking can be realized by respectively adopting software control logic and hardware control logic. According to the paddle operation interlocking method for the variable-pitch system of the wind generating set, firstly, communication among three variable-pitch cabinets in the variable-pitch system is established, so that the variable-pitch positions of any two variable-pitch cabinets in the variable-pitch system can be fed back to the third variable-pitch cabinet, and in a service maintenance mode, when a variable-pitch manual operation box is used for carrying out variable-pitch operation on any paddle, the other two paddles are located at feathering positions, otherwise, the paddle cannot be subjected to variable pitch operation; and interlocking protection control logic is operated through the fan main controller. In the service maintenance mode, the variable pitch mode flag bit f is equal to 1; a fan high-speed shaft brake is always in an input state and cannot be loosened; and the fan main controller dynamically and circularly updates the state of the blade operation flag ai, and when the blade operation flag a2=a3=1, the blade 1 can perform feathering and opening operations.

Description

technical field [0001] The invention relates to a pitch-changing system of a wind power generating set, in particular to a method and device for interlocking operation of blades of the pitch-changing system. Background technique [0002] With the rapid development of wind power generation technology, the potential safety hazards in the wind power industry are gradually exposed. Overspeeding of wind turbines and frequent tower collapse accidents have caused a great threat to the safety and stability of wind power generation units. unit, its stability and safety are extremely important. The unreasonable logic setting of the pitch control system can easily lead to major accidents. For example, the "4.12" fan tower collapse accident in a wind farm in Zhoujiajing, Gansu Province. Due to the operation error of the maintenance personnel, when the blade was calibrated, the No. 1 blade that was opened was not 1. The No. 2 propeller was manually retracted in time, and the No. 3 prope...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00F05B2270/328F05B2270/30F05B2270/402Y02E10/72
Inventor 蔡高原李兵兵王大伟王洒魏庆海李彬
Owner CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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