CN202228273U - Runaway prevention protection device and variable-pitch control system - Google Patents
Runaway prevention protection device and variable-pitch control system Download PDFInfo
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- CN202228273U CN202228273U CN2011203632221U CN201120363222U CN202228273U CN 202228273 U CN202228273 U CN 202228273U CN 2011203632221 U CN2011203632221 U CN 2011203632221U CN 201120363222 U CN201120363222 U CN 201120363222U CN 202228273 U CN202228273 U CN 202228273U
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- control system
- acceleration switch
- wind wheel
- variable
- motor driver
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses a runaway prevention protection device and a variable-pitch control system. The runaway prevention protection device comprises an acceleration switch which is arranged on a wind wheel hub. The acceleration switch is composed of an acceleration sensor, a signal conversion module and a speed detection control module which are sequentially connected, wherein the speed detection control module is connected with an emergency feathering command (EFC) input terminal of a motor driver in the variable-pitch control system. The runaway prevention protection device is provided based on an original variable-pitch control system. The set value of the rotation speed of a wind wheel is larger than that of an original system. When a speed limit device of the original system fails and cannot perform the emergency feathering function to obtain safe feathering, the rotation speed of the wind wheel increases continuously. When the rotation speed of the wind wheel reaches to the set value, a contact point of the acceleration switch disconnects to trigger EFC signals of a safety chain, and the motor driver directly drives a variable-pitch motor to actuate the emergency feathering function respectivley to obtain safe brake of the whole machine.
Description
Technical field
The utility model relates to technical field of wind power generation, particularly a kind of runaway protective gear and variable blade control system.
Background technique
In recent years, the phenomenon that blower fan generation driving collapses appears in the world's each wind field again and again, causes catastrophic heavy losses.And the main cause of blower fan generation driving is that wind speed round is too high, seriously surpasses the rotating speed of its design, surpasses the load that blower fan bore, and causes blower fan to collapse.Causing the too high reason of wind speed round is that variable blade control system is out of control, can't carry out urgent feathering function, realizes dead halt.
At present; The speed-limiting protection method that is applied on the wind generating set pitch control control system mainly is the propeller pitch angle that changes blade through the rotating speed that detects generator; Thereby the rotating speed of control wind wheel, when generator exceeded the speed limit, master control system passed to overspeed signal through bus or triggering theft-resistant link chain and becomes oar PLC controller; Carry out urgent feathering function, realize the complete machine safety brake.Perhaps pass through to detect the rotating speed of wind wheel, and the rotating speed protection module was installed, when rotating speed surpasses a certain setting value, trigger theft-resistant link chain, realize the feathering function near switch.
The speed detector that uses at present is installed in the cabin; After the master control system processing; Through slip ring overspeed signal is passed to and becomes oar PLC controller through EFC (the urgent feathering instruction of Emergency Feathering Command) terminal; Because the signal transmission way is long, the corresponding increase in fault point, the corresponding reduction of unit safety reliability.For example, the bad connection of slip ring signal makes that signal can't carry out real-time, correct transmission between change oar PLC controller and the master control system, causes when hypervelocity, becomes promptly feathering of oar PLC controller, causes taking place the driving catastrophic failure.Main cause is that the gear-box leakage of oil causes oil-feed in the slip ring when serious; Oil is attached to forming oil film between slip ring and the contact pin; Play insulating effect; Cause becoming the oar communication signal off and on, cause master control cabinet control unit to receive and to feed back overspeed signal, cause becoming oar PLC controller and can't carry out urgent feathering; Also have in-built reason, phenomenons such as slip ring magnetic track and probe bad connection occur, interruption and time-delay that also can priming signal owing to slip ring.
Summary of the invention
The utility model has overcome that the speed-limiting protection device signal transmission way of existing wind power generating set is long, the fault point is many; The shortcoming that safety reliability is low relatively provides a kind of principle is simple, convenient for installation and maintenance, safety reliability is high runaway protective gear and variable blade control system.
The technological scheme of the utility model is achieved in that
A kind of runaway protective gear; Comprise acceleration switch; Described acceleration switch is installed on the wind wheel wheel hub; Described acceleration switch detects control module by the acceleration transducer that links to each other successively, signal conversion module and speed to be formed, and described speed detects the EFC input terminal that control module connects motor driver in the variable blade control system.
As preferably, described acceleration switch is installed on the base, and described base links to each other with the wind wheel wheel hub.
As preferably, described acceleration switch is installed in the internal diameter biggest place of wind wheel wheel hub.Described acceleration switch is used to measure wind speed round; Acceleration switch can detect the actual speed signal of wind wheel in real time, according to actual speed signal and setting value result relatively, and the action of control acceleration switch contact.When actual speed signal during less than setting value, the acceleration switch make contact; When actual speed signal during greater than setting value, the acceleration switch contact is broken off; And the acceleration switch contact is connected in the theft-resistant link chain; The EFC signal directly links to each other with the EFC input terminal that becomes the oar motor driver, and when detecting hub rotation speed above setting value, the acceleration switch contact is broken off; Trigger theft-resistant link chain EFC signal; Directly drive 3 change oar motors respectively and carry out urgent feathering function thereby trigger 3 motor drivers, realize the safety brake of complete machine, the driving catastrophic failure occurs to prevent the wind-powered electricity generation unit.
A kind of variable blade control system comprises the master control system that links to each other successively, becomes oar PLC controller, motor driver and change oar motor, and described motor driver is connected with the super capacitor group, and described motor driver is connected with aforesaid runaway protective gear.
Adopted the design concept and the beneficial effect of the utility model of technique scheme to be:
In order to strengthen the safety reliability of wind power generating set; Overcome the deficiency that original system speed limiting device signal transduction pathway is long, the fault point is many; Guarantee when the original system speed limiting device loses efficacy, can carry out urgent feathering function, realize the dead halt of wind-powered electricity generation unit, on the basis of original system, increase the runaway protective gear of this variable blade control system; Increase the layer of protecting measure, make wind power generating set complete machine safety class improve a rank.This runaway protective gear is to install in the wind wheel wheel hub, is independent of the cabin master control system, needn't pass through the slip ring connection so signal line connects, thereby reduces rate of breakdown; And overspeed signal output directly links to each other with the EFC input terminal that becomes the oar motor driver, therefore without controller module, thereby reduce because of controller damage or controller between the fault of communicating by letter and makeing mistakes and causing.More than these 2 designs be enough to explain that when wind wheel exceeds the speed limit this runaway protective gear can reduce the rate of fault of complete machine safety feathering.
The wind speed round setting value of this runaway protective gear is greater than the wind speed round setting value of original system, when the original system speed limiting device lost efficacy, can't carry out urgent feathering function and realize safe feathering; Therefore; Wind speed round continues to increase, and when wind speed round arrived the setting value of acceleration switch, the acceleration switch contact was broken off; Trigger theft-resistant link chain EFC signal; 3 motor drivers directly drive 3 change oar motors respectively and carry out urgent feathering function, realize the safety brake of complete machine, to avoid the generation of wind-powered electricity generation unit driving catastrophic failure.
The practical effect of the utility model mainly shows:
1. principle is simple, convenient for installation and maintenance;
2. reliability, class of security protection are high.
Description of drawings
Fig. 1 is the scheme of installation of the utility model runaway protective gear;
Fig. 2 is the schematic diagram of acceleration switch in the runaway protective gear;
Fig. 3 is the fundamental diagram of the utility model variable blade control system.
Embodiment
The embodiment of the utility model is following:
Embodiment: as shown in Figure 1; A kind of runaway protective gear of the utility model comprises acceleration switch 7, and described acceleration switch 7 is installed on the base 8; Base 8 is installed on the wind wheel wheel hub 10 through screw 9, and described acceleration switch 7 is in the internal diameter biggest place of wind wheel wheel hub 10.
As shown in Figure 2, described acceleration switch detects control module by the acceleration transducer that links to each other successively, signal conversion module and speed to be formed, and described speed detects the EFC input terminal that control module connects motor driver in the variable blade control system; Described acceleration switch is used for detecting in real time the rotating speed of wind wheel along with wind wheel rotates together, and according to the comparative result of setting value, the folding of control contact.
Particularly, acceleration transducer is used for measuring in real time wind wheel rotational angle acceleration; It is rate signal output that signal conversion module is used to degree of will speed up signal conversion; Speed detects the rate signal that control module is used to receive signal conversion module output, according to the comparative result of actual speed signal and setting value, and the action of control acceleration switch contact.When actual speed signal during less than setting value, the acceleration switch make contact; When actual speed signal during greater than setting value, the acceleration switch contact is broken off; And the acceleration switch contact is connected in the theft-resistant link chain, and the EFC signal directly links to each other with the EFC input terminal of motor driver, and when detecting hub rotation speed above setting value, the acceleration switch contact is broken off, and triggers theft-resistant link chain EFC signal.
As shown in Figure 3; A kind of variable blade control system; Comprise the master control system 1 that links to each other successively, become oar PLC controller 2, motor driver 4 and change oar motor 5; Described motor driver 4 is connected with the super capacitor group 6 as power supply, and described motor driver 4 is connected with aforesaid runaway protective gear 3; Because all being the forms with normally-closed contact, the EFC signal of the EFC signal of master control system 1, the EFC signal that becomes oar PLC controller 2, runaway protective gear 3 is cascaded; Then, any fault condition all can trigger the EFC signal when satisfying; By super capacitor group 6 standby power supply is provided; Under the drive controlling of motor driver 4, drive change oar motor 5, realize urgent feathering.
Because runaway protective gear 3 is to be independent of the master control system 1 in cabin and the change oar PLC controller 2 of wheel hub; As last one deck important leverage of complete machine safety protection, the tachometer value of wind wheel when then the setting value of its wind speed round will be higher than master control system 1 triggering theft-resistant link chain EFC.During proper functioning, the EFC input terminal voltage that detects motor driver 4 is high level, when any fault condition satisfies, triggers EFC, and the EFC input terminal voltage that detect motor driver 4 this moment is low level.When need be the immediately urgent feathering that breaks down, and master control system 1 was when losing efficacy with the speed limiting device that becomes oar PLC controller 2, promptly master control system 1 with become oar PLC controller 2 and can't the high level signal of the EFC input terminal voltage of motor driver 4 be become low level; Can't carry out urgent feathering function and realize safe feathering, therefore, wind speed round continues to increase; When wind speed round arrives the setting value of acceleration switch; The acceleration switch contact is broken off, and triggers theft-resistant link chain EFC signal, and the high level signal of the EFC input terminal voltage of motor driver 4 is become low level; By super capacitor group 6 standby power supply is provided; 3 motor drivers in the wind wheel directly drive 3 change oar motors respectively and carry out urgent feathering function, realize the safety brake of complete machine, to avoid the generation of wind-powered electricity generation unit driving catastrophic failure.
Claims (4)
1. runaway protective gear; It is characterized in that: comprise acceleration switch; Described acceleration switch is installed on the wind wheel wheel hub; Described acceleration switch detects control module by the acceleration transducer that links to each other successively, signal conversion module and speed to be formed, and described speed detects the EFC input terminal that control module connects motor driver in the variable blade control system.
2. a kind of runaway protective gear according to claim 1, it is characterized in that: described acceleration switch is installed on the base, and described base links to each other with the wind wheel wheel hub.
3. a kind of runaway protective gear according to claim 1 and 2 is characterized in that: described acceleration switch is installed in the internal diameter biggest place of wind wheel wheel hub.
4. variable blade control system; Comprise the master control system that links to each other successively, become oar PLC controller, motor driver and change oar motor; It is characterized in that: described motor driver is connected with the described runaway protective gear of claim 1, and described motor driver is connected with the super capacitor group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203632221U CN202228273U (en) | 2011-09-26 | 2011-09-26 | Runaway prevention protection device and variable-pitch control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203632221U CN202228273U (en) | 2011-09-26 | 2011-09-26 | Runaway prevention protection device and variable-pitch control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228273U true CN202228273U (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203632221U Expired - Fee Related CN202228273U (en) | 2011-09-26 | 2011-09-26 | Runaway prevention protection device and variable-pitch control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202228273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305178A (en) * | 2011-09-26 | 2012-01-04 | 浙江众科自动化工程科技有限公司 | Anti-galloping protector and propeller changing control system |
| CN105041568A (en) * | 2015-08-28 | 2015-11-11 | 沈阳华创风能有限公司 | Control method for preventing fan galloping |
-
2011
- 2011-09-26 CN CN2011203632221U patent/CN202228273U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305178A (en) * | 2011-09-26 | 2012-01-04 | 浙江众科自动化工程科技有限公司 | Anti-galloping protector and propeller changing control system |
| CN105041568A (en) * | 2015-08-28 | 2015-11-11 | 沈阳华创风能有限公司 | Control method for preventing fan galloping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140926 |
|
| EXPY | Termination of patent right or utility model |