CN204200474U - Hub of megawatt wind generating set theft-resistant link chain - Google Patents
Hub of megawatt wind generating set theft-resistant link chain Download PDFInfo
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- CN204200474U CN204200474U CN201420676668.3U CN201420676668U CN204200474U CN 204200474 U CN204200474 U CN 204200474U CN 201420676668 U CN201420676668 U CN 201420676668U CN 204200474 U CN204200474 U CN 204200474U
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- variable pitch
- pitch driver
- wheel hub
- relay
- link chain
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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 kind of hub of megawatt wind generating set theft-resistant link chain, comprise multiple variable pitch driver, the multiple safety relaies corresponding with variable pitch driver, wheel hub overspeed relay and switching power unit, be connected with wheel hub overspeed relay after described multiple variable pitch driver is connected in series successively, ground connection after wheel hub overspeed relay is connected with multiple safety relay respectively, each safety relay all and be connected to a diode, described switching power unit respectively with multiple variable pitch driver, wheel hub overspeed relay is connected, each variable pitch driver and the normally opened contact being serially connected with the safety relay corresponding with current variable pitch driver in the loop that switching power unit connects.When variable pitch driver breaks down or wheel hub exceeds the speed limit, control safety relay dead electricity by disconnecting wheel hub theft-resistant link chain, thus variable pitch driver drives actuating motor emergency feathering to shut down from main control separately, improves unit reliability and Security.
Description
Technical field
The utility model relates to wind-powered electricity generation field, particularly a kind of hub of megawatt wind generating set theft-resistant link chain.
Background technique
Along with the fast development of wind-powered electricity generation industry, feather Wind turbines is also towards MW class, large scale development, and meanwhile, the requirement of Wind turbines to the Security of system, reliability is also more and more higher.In pitch-variable system controls, again to be related to fan safe, the emergency feathering of steadily shutting down controls the most key.
In modern wind generation technology, safety chain control system is not only the pith of control system, and is the key component that emergency feathering controls.The control system of any high-power blower, first it is considered that the Fail safe protection of blower fan, this is the key of blower fan control system design.Although Wind turbines emergency feathering is directly controlled by safety chain control system; safety chain control system is independent of master control system; but when wheel hub theft-resistant link chain disconnects; the outer theft-resistant link chain of the general wheel hub of emergency feathering detects and triggers; therefore when in column foot and cabin theft-resistant link chain transmission channel occur various abnormal time; as slip ring internal problem, tenminal block problem; still high level is kept at the other end signal of signal transmission pathway; then the action of Wind turbines emergency feathering can not be triggered in time; unit can not be shut down effectively in time, very likely causes serious consequence.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of hub of megawatt wind generating set theft-resistant link chain of shutting down to control actuating motor emergency feathering with wheel hub theft-resistant link chain break-make.
The technological scheme that the utility model solves the problem is: a kind of hub of megawatt wind generating set theft-resistant link chain, comprise multiple variable pitch driver, the multiple safety relaies corresponding with variable pitch driver, wheel hub overspeed relay and switching power unit, be connected with wheel hub overspeed relay after described multiple variable pitch driver is connected in series successively, ground connection after wheel hub overspeed relay is connected with multiple safety relay respectively, each safety relay all and be connected to a diode, enable signal is successively through multiple variable pitch driver, multiple safety relay is sent into after wheel hub overspeed relay, described switching power unit respectively with multiple variable pitch driver, wheel hub overspeed relay is connected, each variable pitch driver and the normally opened contact being serially connected with the safety relay corresponding with current variable pitch driver in the loop that switching power unit connects.
The beneficial effects of the utility model are: wheel hub theft-resistant link chain of the present utility model comprises multiple variable pitch driver and safety relay; when variable pitch driver breaks down or wheel hub exceeds the speed limit; safety relay dead electricity is controlled by disconnecting wheel hub theft-resistant link chain; thus variable pitch driver drives actuating motor emergency feathering to shut down from main control separately; when solving the disconnection of wheel hub theft-resistant link chain; because master control system exception or theft-resistant link chain transmission channel fault can not the problems of feathering in time, improve unit reliability and Security.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model wheel hub theft-resistant link chain.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, the utility model relates to hub of megawatt wind generating set theft-resistant link chain, and this wheel hub theft-resistant link chain comprises the first variable pitch driver 1, second variable pitch driver 2, the 3rd variable pitch driver 3, wheel hub overspeed relay 4, switching power unit 5, first safety relay 6, second safety relay 7, the 3rd safety relay 8.Described first variable pitch driver 1, second variable pitch driver 2, 3rd variable pitch driver 3 is connected with wheel hub overspeed relay 4 after being connected in series successively, wheel hub overspeed relay 4 respectively with the first safety relay 6, second safety relay 7, ground connection after 3rd safety relay 8 is connected, each safety relay all and be connected to a diode, described switching power unit 5 respectively with the first variable pitch driver 1, second variable pitch driver 2, 3rd variable pitch driver 3, wheel hub overspeed relay 4 is connected, the normally opened contact of the safety relay corresponding with current variable pitch driver is serially connected with in the loop that each variable pitch driver and switching power unit 5 connect, namely the normally opened contact of the first safety relay 6 is connected in series in the loop that the first variable pitch driver 1 is connected with switching power unit 5, the normally opened contact of the second safety relay 7 is connected in series in the loop that second variable pitch driver 2 is connected with switching power unit 5, the normally opened contact of the 3rd safety relay 8 is connected in series in the loop that 3rd variable pitch driver 3 is connected with switching power unit 5.
The controlling method of hub of megawatt wind generating set theft-resistant link chain, comprises the following steps:
1) controller sends enable signal to theft-resistant link chain, enable signal is through the first variable pitch driver 1, judge whether enable signal interrupts, if interrupt, then theft-resistant link chain interrupts, Wind turbines performs autonomous feathering and shuts down, if do not interrupt, then continues to run until next series connection node second variable pitch driver 2 of theft-resistant link chain; Enable signal, through the second variable pitch driver 2, judges whether enable signal interrupts, if interrupt, then theft-resistant link chain interrupts, and Wind turbines performs autonomous feathering and shuts down, if do not interrupt, then continues to run until next series connection node of theft-resistant link chain the 3rd variable pitch driver 3; Enable signal, through the 3rd variable pitch driver 3, judges whether enable signal interrupts, if interrupt, then theft-resistant link chain interrupts, and Wind turbines performs autonomous feathering and shuts down, if do not interrupt, then continues to run until next series connection node wheel hub overspeed relay 4 of theft-resistant link chain;
2) enable signal is when wheel hub overspeed relay 4, judges that whether hub rotation speed is more than 22.5rpm, and if so, then wheel hub overspeed relay 4 normally open contact disconnects, and theft-resistant link chain interrupts, and Wind turbines performs autonomous feathering and shuts down; If not then wheel hub overspeed relay 4 normally open contact remains closed, safety chain system keeps normally enable, and Wind turbines normally runs.
Working principle of the present utility model is as follows: when theft-resistant link chain lose master controller enable or theft-resistant link chain disconnects because of fault time, the first safety relay 6 be connected with wheel hub overspeed relay 4, second safety relay 7, on 3rd safety relay 8, coil loses wheel hub theft-resistant link chain enable signal, first safety relay 6, second safety relay 7, 3rd safety relay 8 dead electricity, respectively with the first variable pitch driver 1, second variable pitch driver 2, the first safety relay 6 that 3rd variable pitch driver 3 is connected, second safety relay 7, the normally open contact of the 3rd safety relay 8 disconnects, trigger the first variable pitch driver 1, second variable pitch driver 2, 3rd variable pitch driver 3 simultaneously from main control separately actuating motor according to the Speed-position curve feathering preset, wheel hub safety chain signal is fed back to master controller simultaneously.
Claims (1)
1. a hub of megawatt wind generating set theft-resistant link chain, it is characterized in that: comprise multiple variable pitch driver, the multiple safety relaies corresponding with variable pitch driver, wheel hub overspeed relay and switching power unit, be connected with wheel hub overspeed relay after described multiple variable pitch driver is connected in series successively, ground connection after wheel hub overspeed relay is connected with multiple safety relay respectively, each safety relay all and be connected to a diode, enable signal is successively through multiple variable pitch driver, multiple safety relay is sent into after wheel hub overspeed relay, described switching power unit respectively with multiple variable pitch driver, wheel hub overspeed relay is connected, each variable pitch driver and the normally opened contact being serially connected with the safety relay corresponding with current variable pitch driver in the loop that switching power unit connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676668.3U CN204200474U (en) | 2014-11-13 | 2014-11-13 | Hub of megawatt wind generating set theft-resistant link chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676668.3U CN204200474U (en) | 2014-11-13 | 2014-11-13 | Hub of megawatt wind generating set theft-resistant link chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204200474U true CN204200474U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420676668.3U Active CN204200474U (en) | 2014-11-13 | 2014-11-13 | Hub of megawatt wind generating set theft-resistant link chain |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405582A (en) * | 2014-11-13 | 2015-03-11 | 湖南世优电气股份有限公司 | Wheel hub safety chain of megawatt wind generating set and control method thereof |
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2014
- 2014-11-13 CN CN201420676668.3U patent/CN204200474U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405582A (en) * | 2014-11-13 | 2015-03-11 | 湖南世优电气股份有限公司 | Wheel hub safety chain of megawatt wind generating set and control method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |