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Safety control system and safety control method of wind generating set

A technology for wind turbine safety control, which is applied in the control of wind turbines, wind turbines, and wind power generation. It can solve problems such as high dependence and potential safety hazards, and achieve low cost and simple system structure.

Inactive Publication Date: 2013-06-05
XUJI GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a safety control system for wind power generators and its safety control method, which is used to solve the safety hazards in the prior art due to the high dependence of the safety chain control system on the main control system of wind power.

Method used

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  • Safety control system and safety control method of wind generating set
  • Safety control system and safety control method of wind generating set
  • Safety control system and safety control method of wind generating set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 2 The circuit of the safety chain control system of the present invention shown, its safety chain control loop and figure 1 Similarly, the 24V safety signal terminal passes through the emergency stop switch K1, the vibration switch K2 ... the watchdog switch Kn, the main contacts 1 and 2 of the safety chain self-locking relay KM1, the coil of KM1, and finally the power ground. The main contacts 1 and 2 of KM1 are connected in parallel with the reset switch S1. When the safety connection point is disconnected and needs to be reset, S1 is closed, so that the safety chain self-locking relay KM1 is powered on, its main contacts 1 and 2 are closed, and the safety chain returns to normal .

[0029] Safety signal access circuit: each servo driver C1, C2, C3 is connected to the 24V safety signal terminal through the corresponding auxiliary contacts (3, 4, 5, 6, 7, 8) of KM1.

[0030] Each servo driver C1, C2, C3 is connected to a corresponding pitch drive moto...

Embodiment 2

[0038] Such as Figure 5 As shown, the difference from Embodiment 1 is only in the way of speed identification. The encoder and overspeed module are replaced by centrifugal switches. The centrifugal mechanism of the centrifugal force switch is installed on the rotor shaft, and its contacts 20 and 21 replace the figure 2 Internal contacts 10, 11 of the overspeed module in . The centrifugal switch acts according to the centrifugal force generated when the object rotates. It belongs to the mechanical switch and has strong anti-interference ability.

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Abstract

The invention relates to a safety control system and a safety control method of a wind generating set. The system provided by the invention comprises a safety chain control loop, a safety signal inserting loop of paddle-changing system servo drivers corresponding to each paddle, and is also provided with an overspeed monitor loop, wherein the overspeed monitor loop comprises an anti-overspeed relay coil and a switch used for responding to the revolving speed of a wind wheel, the switch is connected in series with the anti-overspeed relay coil and connected with a power supply; and each group of contacts of an anti-overspeed relay are respectively connected in the safety signal inserting loop corresponding to each servo driver in series. A paddle-changing system distinguishes the rotation rate of the wind wheel, when the rotation rate is greater than the allowable value, the paddle-changing system executes stop operation initiatively, thereby avoiding the phenomenon that the safety system information can not be accurately transferred to the paddle-changing system due to control system abnormity, thus the wind generating set can not halt so as to further cause fan safe accidents to appear and enlarge.

Description

technical field [0001] The invention relates to the field of safety control of a megawatt-level wind power generating set, in particular to a safety control system and a safety control method for a wind power generating set. Background technique [0002] As the national development plan has higher and higher requirements for environmental protection, wind power, as an environmentally friendly and non-polluting clean energy, has received strong support from relevant state departments. When the wind passes through the blades, it will drive the wind wheel to rotate, converting the wind energy into mechanical energy, and the wind wheel drives the generator to convert the mechanical energy into electrical energy, thus realizing wind power generation. At present, there are many styles of wind turbines, which can be divided into vertical axis and horizontal axis wind turbines, and can be divided into single-blade wind turbines and three-blade wind turbines according to the number o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 王大为陶学军张举良贾晓杰常晶闫黎明岳红轩苏静卢晓光
Owner XUJI GRP
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