A Control System for Preventing Fan from Overspeeding
A control system and brake control valve technology, which is applied in the control of wind turbines, the purpose of the control system, and the speed control, etc., can solve the problems that the fan cannot be effectively prevented from overspeeding, and achieve the effect of preventing the fan from overspeeding
Active Publication Date: 2018-11-30
NARI TECH CO LTD +3
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a control system for preventing the overspeeding of the fan, and solve the technical problem that the overspeeding of the fan cannot be effectively prevented when the pitch changes in the prior art.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0019] Such as figure 1 Shown is the main circuit diagram of the yaw motor. The contactors KM1 and KM2 are used to control the on-off of the yaw motor and the main circuit. KM1 controls the clockwise yaw, and the contactor KM2 controls the counterclockwise yaw.
[0020] The control circuit of the yaw motor includes the left yaw contactor KM1, the right yaw contactor KM2 and the normally closed switch K7 used to receive the yaw braking state. When the brake is applied, the contact 11 of the normally closed switch K7 , 12 disconnected. The control circuits of the left yaw contactor KM1 and the right yaw contactor KM2 both include a software yaw control circuit controlled by the output yaw comman...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a control system for preventing a draught fan from running away. The control system comprises a yaw brake control valve, a left yaw contactor KM1, a right yaw contactor KM2, a yaw untwisting switch, an over-speed detector and a time relay KT1 used for regulating yaw time, wherein the control circuits of the left yaw contactor KM1 and the right yaw contactor KM2 respectively comprise a software yaw control circuit controlled by a yaw instruction output by a PLC (programmable logic controller) and a hardware yaw control circuit controlled by output of a cabin position relay, wherein the software yaw control circuit and the hardware yaw control circuit are connected in parallel; a normally-open switch K2 with closing time controlled by the time relay KT1 is in series connected in the corresponding hardware yaw control circuit; when the over-speed detector detects an over-speed signal, the time relay KT1 regulates yaw time according to a yaw angle per second of a yaw motor; and the PLC controls the action of the yaw motor according to the yaw untwisting switch, so that the draught fan deviates from a main draught fan position, and therefore, the draught fan is prevented from running away.
Description
technical field [0001] The invention relates to a control system for preventing wind turbines from overspeeding, and belongs to the technical field of wind power generating sets. Background technique [0002] Under normal circumstances, the speed of the fan is controlled by the controller, and the blade angle is adjusted in real time to make the speed as close as possible to the rated speed. [0003] When the speed exceeds the rated speed, the control system will take protective measures according to the degree to which the actual speed exceeds the rated speed. Usually there are two levels of protection for exceeding the rated speed. The first level is software overspeed protection, that is, when the speed collected by the controller is higher than the maximum speed set by the controller, the controller will order the fan to stop and the pitch system to retract. The second level is the hardware overspeed protection, that is, when the software overspeed is reached, the pitc...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F03D7/00
CPCF03D7/00F05B2270/1011F05B2270/602Y02E10/72
Inventor 付洪利邵宜祥王文卓鲁斌刘欣村田雷刘剑沈鑫潘晨
Owner NARI TECH CO LTD