CN102108938B - Method for detecting running reliability of fan safety chain - Google Patents

Abstract

A method for detecting the reliability of a wind turbine safety chain operation, comprising the following steps: (1) setting the safety chain detection interval time in a controller; Timer, execute step (3); if it is in emergency stop state, reset the timer; (3) judge whether the timer time is greater than the detection interval time, if yes, execute step (4); if not, return to step (2) ;(4) Judging whether the external wind speed of the fan is less than the design value, if so, go to step (5); if not, return to step (2); (5) Enter the safety chain detection state, and the fan safety chain system is triggered; (6) Judgment Whether the emergency blade retraction speed of the fan is ≥ the design value, if so, return to step (2); if not, shut down for inspection. By using the invention to detect the operation reliability of the safety chain of the wind turbine, it is beneficial to ensure that the wind turbine can be safely stopped in case of any emergency.

Description

A method for testing the reliability of wind turbine safety chain operation

technical field

The invention relates to a method for detecting the operation reliability of a fan safety chain.

Background technique

The geographical location of the fan installation is selected in the area where the wind resource meets the operation requirements of the fan, and the working environment is generally relatively harsh, such as a remote coastal area or a sandstorm area. Safety guarantee system, so the importance of the safety chain is self-evident. At present, most of the fans are variable-speed and variable-pitch fans, and most of them are powered by batteries, but there is no way to detect whether the function of the safety system is intact and reliable.

Contents of the invention

The purpose of the present invention is to provide a method for detecting the reliability of the operation of the safety chain of the fan. With this method, it is possible to judge whether the function of the safety system is intact and reliable without adding any additional detection equipment.

The purpose of the present invention is achieved through the following technical solutions: a method for detecting the reliability of the fan safety chain operation, comprising the following steps:

(1) Set the safety chain detection interval time in the controller;

(2) Determine whether the wind turbine is in the state of power generation or emergency shutdown. If the wind turbine is in the state of power generation, start the timer and perform step (3); if the wind turbine is in the state of emergency shutdown, reset the timer;

(3) Determine whether the timer time is greater than the detection interval, if yes, perform step (4); if not, return to step (2);

(4) Determine whether the external wind speed of the fan is lower than the design value, if so, perform step (5); if not, return to step (2);

(5) The wind turbine enters the safety chain detection state, and the wind turbine safety chain system is triggered;

(6) Determine whether the blade speed of the fan for emergency propeller retraction is greater than or equal to the design value, if so, return to step (2); if not, stop for maintenance.

The invention detects the operation reliability of the safety chain of the fan by controlling the operation mode of the fan, which is beneficial to ensure that the fan can be safely stopped in case of any emergency; Remedial maintenance measures.

Description of drawings

Figure 1 is a flow chart of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

With reference to Fig. 1, the present invention comprises the following steps:

Step S1: Set the safety chain detection interval time in the controller;

Step S2: Determine the running state of the wind turbine. If the wind turbine is in the power generation state, start the timer and execute step S3; if the wind turbine is in the emergency shutdown state, reset the timer;

Step S3: Determine whether the timer time is greater than the detection interval time, if yes, execute step S4; if no, return to step S2;

Step S4: Determine whether the external wind speed of the fan is lower than the design value, if yes, execute step S5; if no, return to step S2;

Step S5: The wind turbine enters the safety chain detection state, the wind turbine safety chain system is triggered, and then step S6 is executed;

Step S6: Determine whether the blade speed of the wind turbine for emergency blade retraction is greater than or equal to the design value. If yes, it indicates that the safety chain of the wind turbine is reliable, and return to step S2; if not, shut down for inspection.

What is described above is only an embodiment of the present invention, and those skilled in the art can make various changes to the present invention according to the above description. Certain details in the embodiments should not limit the protection scope of the present invention.

Claims (1)

1. method that detects blower fan theft-resistant link chain operational reliability may further comprise the steps:

(1) in controller, sets the theft-resistant link chain assay intervals time;

(2) judge whether blower fan is in generating or emergency shutdown state,, start timer, execution in step (3) if the blower fan group is in generating state; If blower fan is in the emergency shutdown state, the timer zero clearing;

(3) whether judge timer time greater than the assay intervals time, if, execution in step (4); If, do not return step (2);

(4) whether judge the outside wind speed of blower fan less than design load, if, execution in step (5); If, do not return step (2);

(5) blower fan gets into theft-resistant link chain detected state, blower fan theft-resistant link chain system triggers;

(6) judge Blade Rate that blower fan promptly puts away the oars whether >=design load, if return step (2); If, do not shut down maintenance.

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