CN213711230U - Back-up power supply feathering control device of direct-current variable pitch control system - Google Patents
Back-up power supply feathering control device of direct-current variable pitch control system Download PDFInfo
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- CN213711230U CN213711230U CN202022263589.8U CN202022263589U CN213711230U CN 213711230 U CN213711230 U CN 213711230U CN 202022263589 U CN202022263589 U CN 202022263589U CN 213711230 U CN213711230 U CN 213711230U
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- power supply
- feathering
- control switch
- backup power
- 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
A back-up power supply feathering control device of a direct current pitch control system comprises a PLC, a driver, a back-up power supply, a pitch motor, a first back-up power supply feathering control switch and a second back-up power supply feathering control switch, wherein the PLC is connected with the input end of the driver; the output end of the driver is connected with a variable pitch motor; the first output end of the backup power supply is connected with one end of a feathering control switch of the first backup power supply; the other end of the first backup power supply feathering control switch is connected with the driver; the second output end of the backup power supply is connected with one end of a second backup power supply feathering control switch; the other end of the second backup power supply feathering control switch is connected with a pitch motor; the first backup power supply feathering control switch and the second backup power supply feathering control switch can not be closed at the same time, and are electrically interlocked. The utility model discloses it is controllable to realize the unit feathering speed under the operating mode of urgent feathering, has improved wind generating set safe operation's stability.
Description
Technical Field
The utility model belongs to wind generating set control field especially relates to a direct current becomes oar control system and becomes oar reserve power feathering controlling means.
Background
In order to ensure the safety of the wind generating set, the early direct-current variable-pitch control system controls a backup power supply to be connected with a variable-pitch motor after an emergency feathering signal of the wind generating set is triggered or a main power supply of the variable-pitch control system is powered off for more than 5 seconds, and the backup power supply supplies power to control each blade to feather to a safe position. Although the control method can ensure that the blades are feathered to a safe position, the back-up power supply directly supplies power to the variable-pitch motor to drive the blades to feather, so the feathering speed of the blades is uncontrollable. When the feathering speed is too high, the load of the wind generating set is increased, the set is greatly impacted, and meanwhile, the fatigue of other parts of the wind generating set is accelerated.
Therefore, the feathering speed of the wind generating set needs to be controlled under the working condition of emergency feathering, the situation that the feathering speed is too high is avoided, the unit load in the feathering process is reduced, and the safety operation stability of the wind generating set is improved.
Disclosure of Invention
In order to overcome the uncontrollable not enough of feathering speed of early direct current oar control system under the operating mode of urgent feathering, the utility model provides a direct current oar control system becomes oar back-up source feathering controlling means realizes that the unit is controllable in feathering speed under the operating mode of urgent feathering, has improved wind generating set safety operation's stability.
The utility model provides a technical scheme that its technical problem adopted is:
a back-up power supply feathering control device of a direct current pitch control system comprises a PLC, a driver, a back-up power supply, a pitch motor, a first back-up power supply feathering control switch and a second back-up power supply feathering control switch, wherein the PLC is connected with the input end of the driver; the output end of the driver is connected with a variable pitch motor; the first output end of the backup power supply is connected with one end of a feathering control switch of the first backup power supply; the other end of the first backup power supply feathering control switch is connected with the driver; the second output end of the backup power supply is connected with one end of a second backup power supply feathering control switch; the other end of the second backup power supply feathering control switch is connected with a pitch motor; the first backup power supply feathering control switch and the second backup power supply feathering control switch can not be closed at the same time, and are electrically interlocked.
The utility model discloses a direct current becomes oar control system back-up source feathering controlling means's control logic does: (1) when the unit has an emergency feathering working condition, and the PLC and the driver work normally, the PLC controls the feathering control switch of the first backup power supply to be switched on, the feathering control switch of the second backup power supply to be switched off, the backup power supply supplies power to the driver, and the driver drives the motor to control the blades to feather to a safe position according to the feathering speed set by the PLC; (2) when the unit has an emergency feathering working condition, the PLC is halted or cannot normally issue a control command, but the driver can normally work, at the moment, the first back-up power supply feathering control switch is closed, the second back-up power supply feathering control switch is opened, the back-up power supply supplies power to the driver, and the driver drives the motor to control the blades to feather to a safe position according to the feathering speed set in the driver; (3) when the unit has an emergency feathering working condition, the PLC and the driver can not work normally, the first back-up power supply feathering control switch is switched off, the second back-up power supply feathering control switch is switched on, the back-up power supply directly supplies power to the variable pitch motor, and the variable pitch motor directly drives the blades to feather to a safe position.
The technical conception of the utility model is as follows: when the wind generating set has an emergency feathering working condition, the running conditions of the PLC and the driver are judged, and when the PLC and the driver work normally, the state of a feathering control switch of a backup power supply is controlled by the PLC, so that the backup power supply supplies power to the driver and a driving motor controls the feathering of the blades to a safe position according to a set feathering speed; when the PLC is halted or cannot normally issue a control instruction, but the driver can normally work, the backup power supply supplies power to the driver and drives the motor to control the blades to feather to a safe position according to the set feathering speed; when the PLC and the driver can not work normally, the backup power supply directly supplies power to the variable pitch motor, and the variable pitch motor directly drives the blades to feather to a safe position. Through the feathering control device of the backup power supply of the direct-current variable pitch control system, the control of the feathering speed of the unit under different conditions is realized, the condition of overhigh feathering speed is avoided, the load of the unit in the feathering process is reduced, and the stability of the safe operation of the wind generating set is greatly improved.
The invention has the beneficial effects that: the controllable feathering speed of the wind generating set under the working condition of emergency feathering is realized, and the stability of safe operation of the wind generating set is improved.
Drawings
FIG. 1 is a topological diagram of a backup power supply feathering control device of a direct current pitch control system.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a back-up power supply feathering control device of a direct current pitch control system comprises a PLC, a driver, a back-up power supply, a pitch motor, a first back-up power supply feathering control switch and a second back-up power supply feathering control switch, wherein the PLC is connected with the input end of the driver; the output end of the driver is connected with a variable pitch motor; the first output end 1 of the backup power supply is connected with one end of a first backup power supply feathering control switch; the other end of the first backup power supply feathering control switch is connected with the driver; the second output end 2 of the backup power supply is connected with one end of a second backup power supply feathering control switch; the other end of the second backup power supply feathering control switch is connected with a pitch motor; the first backup power supply feathering control switch and the second backup power supply feathering control switch can not be closed at the same time, and are electrically interlocked, so that the phenomenon that a pitch motor is uncontrollable is prevented.
The control logic of the DC variable pitch control system back-up power supply feathering control device is as follows: (1) when the unit has an emergency feathering working condition, and the PLC and the driver work normally, the PLC controls the feathering control switch of the first backup power supply to be switched on, the feathering control switch of the second backup power supply to be switched off, the backup power supply supplies power to the driver, and the driver drives the motor to control the blades to feather to a safe position according to the feathering speed set by the PLC; (2) when the unit has an emergency feathering working condition, the PLC is halted or cannot normally issue a control command, but the driver can normally work, at the moment, the first back-up power supply feathering control switch is closed, the second back-up power supply feathering control switch is opened, the back-up power supply supplies power to the driver, and the driver drives the motor to control the blades to feather to a safe position according to the feathering speed set in the driver; (3) when the unit has an emergency feathering working condition, the PLC and the driver can not work normally, the first back-up power supply feathering control switch is switched off, the second back-up power supply feathering control switch is switched on, the back-up power supply directly supplies power to the variable pitch motor, and the variable pitch motor directly drives the blades to feather to a safe position.
When the wind generating set has an emergency feathering working condition, the running conditions of the PLC and the driver are judged, and when the PLC and the driver work normally, the state of a feathering control switch of a backup power supply is controlled by the PLC, so that the backup power supply supplies power to the driver and a driving motor controls the feathering of the blades to a safe position according to a set feathering speed; when the PLC is halted or cannot normally issue a control instruction, but the driver can normally work, the backup power supply supplies power to the driver and drives the motor to control the blades to feather to a safe position according to the set feathering speed; when the PLC and the driver can not work normally, the backup power supply directly supplies power to the variable pitch motor, and the variable pitch motor directly drives the blades to feather to a safe position. Through the feathering control device of the backup power supply of the direct-current variable pitch control system, the control of the feathering speed of the unit under different conditions is realized, the condition of overhigh feathering speed is avoided, the load of the unit in the feathering process is reduced, and the stability of the safe operation of the wind generating set is greatly improved.
The embodiments described in this specification are merely examples of implementations of the inventive concepts, which are intended for illustrative purposes only. The scope of the present invention should not be construed as being limited to the specific forms set forth in the following description, but rather should be construed as encompassing all the equivalent technical means which may be conceived by one of ordinary skill in the art based on the teachings of the present invention.
Claims (1)
1. The utility model provides a direct current becomes oar control system back-up source feathering controlling means which characterized in that: the back-up power supply feathering control device comprises a PLC (programmable logic controller), a driver, a back-up power supply, a pitch motor, a first back-up power supply feathering control switch and a second back-up power supply feathering control switch, wherein the PLC is connected with the input end of the driver; the output end of the driver is connected with a variable pitch motor; the first output end of the backup power supply is connected with one end of a feathering control switch of the first backup power supply; the other end of the first backup power supply feathering control switch is connected with the driver; the second output end of the backup power supply is connected with one end of a second backup power supply feathering control switch; the other end of the second backup power supply feathering control switch is connected with a pitch motor; the first backup power supply feathering control switch and the second backup power supply feathering control switch can not be closed at the same time, and are electrically interlocked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022263589.8U CN213711230U (en) | 2020-10-13 | 2020-10-13 | Back-up power supply feathering control device of direct-current variable pitch control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022263589.8U CN213711230U (en) | 2020-10-13 | 2020-10-13 | Back-up power supply feathering control device of direct-current variable pitch control system |
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| CN213711230U true CN213711230U (en) | 2021-07-16 |
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| CN202022263589.8U Active CN213711230U (en) | 2020-10-13 | 2020-10-13 | Back-up power supply feathering control device of direct-current variable pitch control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323802A (en) * | 2021-07-15 | 2021-08-31 | 国家电投集团广西兴安风电有限公司 | Fan becomes oar system safety interlock |
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2020
- 2020-10-13 CN CN202022263589.8U patent/CN213711230U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323802A (en) * | 2021-07-15 | 2021-08-31 | 国家电投集团广西兴安风电有限公司 | Fan becomes oar system safety interlock |
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