CN212744206U - Variable frequency control device of pitch system of wind generating set - Google Patents
Variable frequency control device of pitch system of wind generating set Download PDFInfo
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- CN212744206U CN212744206U CN202021340918.8U CN202021340918U CN212744206U CN 212744206 U CN212744206 U CN 212744206U CN 202021340918 U CN202021340918 U CN 202021340918U CN 212744206 U CN212744206 U CN 212744206U
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- power supply
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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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- 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
- Y02E10/76—Power conversion electric or electronic aspects
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- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a variable frequency control device of a pitch system of a wind generating set, which comprises a cabin and a hub, wherein a pitch controller is arranged in a cabin control cabinet, three pitch drivers, a pitch motor and a main power supply unit are arranged in a pitch system cabinet, the emergency power supply unit, switching power supply and relay, be provided with the sliding ring between cabin and the wheel hub, it connects the input of sliding ring through the back connecting rod to become the oar controller, the output of sliding ring passes through the front connecting rod and connects three change oar driver respectively, it connects one respectively to become the oar motor to become the oar driver, it is connected with the fan blade to become the oar motor through gear drive mechanism, a main power supply unit and emergency power supply unit are connected respectively to every switching power supply's input, be connected with power contactor between main power supply unit and the emergency power supply unit, it becomes the oar driver to connect one respectively to every switching power supply's output, it is connected with a relay to. The utility model discloses can guarantee power supply safety, and the environmental suitability is strong.
Description
Technical Field
The utility model relates to a wind power generation technical field, concretely relates to variable-frequency control device of wind generating set oar system.
Background
The wind energy is a clean energy with rapid development and has wide development prospect. In recent years, wind generating sets have undergone rapid development of fixed pitch stall type, full-blade pitch type, variable speed type based on variable speed constant frequency technology and intelligent type, in the development process, development of the control technology of the wind generating sets plays a decisive role, and development of the blade drive control technology plays an important role in promoting development of the whole technology. The control of the blades is related to the safety of the whole wind turbine generator, so the reliability of the blade control device is very important, and before the blades return to the safety position, the energy supply for driving the blades must be guaranteed to be constant, even under the condition that an external power supply cannot provide the energy.
At present, the pitch control device in wind power generation equipment in China and even the world is mainly as follows: according to the traditional direct-current servo drive control device with the direct-current motor as an execution part and the storage battery as a backup power supply, a direct-current servo drive technology is adopted, when a system fails, the storage battery is automatically switched to supply power, and the paddle is driven to return to a safe position. However, the short service life, the short maintenance period and the poor low temperature resistance of the storage battery become fatal defects which hinder the development of the storage battery. The operation control, the execution of system fault processing results, manual operation and automation of the product are completely dependent on the variable pitch drive, and once the variable pitch drive per se has a fault, the blade cannot return to the zero-power angular position, so that the whole wind turbine generator is in an unsafe state. In a wind power plant, a destructive event that the blades cannot return to a safe position due to the failure of a standby power supply occurs for many times, so that the wind turbine falls down.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a variable frequency control device of wind generating set oar system.
The technical scheme of the utility model as follows:
a variable-frequency control device of a variable-pitch system of a wind generating set comprises a cabin and a hub, wherein a cabin control cabinet is arranged in the cabin, a variable-pitch controller is arranged in the cabin control cabinet, a variable-pitch system cabinet is arranged in the hub, three variable-pitch drivers, three variable-pitch motors, three main power supply units, three standby power supply units, three switching power supplies and three relays are arranged in the variable-pitch system cabinet, a slip ring is arranged between the cabin and the hub, the variable-pitch controller is connected with the input end of the slip ring through a rear connecting rod, the output end of the slip ring is respectively connected with the three variable-pitch drivers through a front connecting rod, each variable-pitch driver is respectively connected with one variable-pitch motor, the variable-pitch motors are connected with blades through a gear transmission mechanism, the input end of each switching power supply is respectively connected with one main power supply unit, the output end of each switching power supply is connected with a variable pitch driver, and a relay is connected between each variable pitch driver and the variable pitch motor.
Furthermore, each gear transmission mechanism is connected with a heater, and a temperature and humidity controller is connected between the heater and the fan blades.
Further, the main power supply unit includes a main power supply, an input reactor, and a main power supply switch, the main power supply is connected to the switching power supply through the input reactor, and the main power supply switch is connected between the main power supply and the input reactor.
Further, the main power supply is connected with a lightning protection device.
Further, reserve power supply unit includes ultracapacitor system, fuse and stand-by power switch, ultracapacitor system passes through the fuse and connects switching power supply, stand-by power switch connects between ultracapacitor system and the fuse.
Further, the variable pitch controller is a programmable controller.
Further, the variable pitch drive is an AC-AC type alternating current variable frequency drive.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model is only provided with the variable pitch controller inside the engine room, when debugging and maintaining personnel find out faults, the personnel can directly inquire inside the engine room without entering the inside of the hub, thereby greatly reducing the difficulty of fault inquiry and improving the speed and efficiency of fault troubleshooting;
2. the main power supply and the standby power supply are combined for power supply, and the normal power supply is not influenced when any power supply fails, so that the power supply safety of the variable pitch system is ensured;
3. when the variable pitch drive fails, a fault signal is output, the relay is electrified to work, the main power supply unit and the standby power supply unit are switched on, the power supply unit directly supplies power to the variable pitch motor, and the variable pitch motor drives the fan blades to return to a safe position, so that the defect that some variable pitch systems completely depend on the variable pitch drive for driving control of the variable pitch motor is overcome, the safety of the variable pitch system and even the whole unit can be improved, and the environment adaptability of the fan is improved;
4. the heater is arranged on each gear transmission mechanism, the gear transmission mechanisms can be preheated through the heater, the low-temperature starting capacity and reliability of the gear transmission mechanisms are enhanced, the low-temperature starting time of the wind turbine generator is greatly shortened, the fault rate of the whole machine is reduced, the labor intensity of field workers is reduced, and the device is particularly suitable for being popularized and applied in alpine regions.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of a frequency conversion control device of a pitch system of a wind turbine generator system according to an embodiment of the present invention;
fig. 2 is a circuit block diagram of the variable frequency control device of the pitch system of the wind generating set provided by the embodiment of the present invention.
Description of reference numerals:
1- -nacelle 11- -Pitch controller
2-hub 21-Pitch drive
22-variable pitch motor 23-main power supply unit
231-main power supply 232-input reactor
233 main power switch 234 lightning arrester
24-backup power supply unit 241-super capacitor
242-fuse 243-backup power switch
25- -switching power supply 26- -Relay
27-Gear drive 28-Fan blade
3- -slip ring 4- -rear connecting rod
5-front connecting rod 6-power supply contactor
7-a heater 8-a temperature and humidity controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Examples
Referring to fig. 1 and 2, an embodiment of the present invention provides a variable frequency control device for a pitch system of a wind turbine generator system, including a nacelle 1 and a hub 2, a nacelle control cabinet is disposed in the nacelle 1, a pitch controller 11 is disposed in the nacelle control cabinet, a pitch system cabinet is disposed in the hub 2, three pitch drivers 21, three pitch motors 22, three main power supply units 23, three standby power supply units 24, three switching power supplies 25 and three relays 26 are disposed in the pitch system cabinet, a slip ring 3 is disposed between the nacelle 1 and the hub 2, the pitch controller 11 is connected to an input end of the slip ring 3 through a rear connecting rod 4, an output end of the slip ring 3 is connected to the three pitch drivers 21 through a front connecting rod 5, each pitch driver 21 is connected to one pitch motor 22, the pitch motor 22 is connected to a fan blade 28 through a gear transmission mechanism 27, an input end of each switching power supply 25 is connected to one main power supply unit 23 and one standby power supply unit, the power supply contactor 6 is connected between the main power supply unit 23 and the standby power supply unit 24, the output end of each switching power supply 25 is connected with a variable pitch driver 21, and a relay 26 is connected between the variable pitch driver 21 and the variable pitch motor 22.
The pitch controller 11 is used for receiving a pitch angle instruction given by a main control system in the nacelle 1 and coordinating three pitch drivers 21 to work in a coordinated manner, so that safe and reliable operation of the three pitch control cabinets is ensured. The pitch driver 21 is used for driving the pitch motor 22 to move and operate according to the instructions such as the angle and the speed given by the pitch controller 11. The slip ring 3 is used for transmitting electric energy and signals between the engine room 1 and the hub 2, completing electric energy power transmission from the engine room 1 to the variable-pitch cabinet body of the hub 2, and transmitting signal communication transmission between the variable-pitch controller 11 in the engine room 1 and the variable-pitch driver 21 in the hub. When the variable-pitch control device is used, the variable-pitch controller 11 controls the variable-pitch driver 21 through the sliding ring 3, and the variable-pitch driver 21 controls the angle of the fan blade 28 of the wind turbine generator set, so that the rotating speed of the wind wheel is controlled, and the output power of the wind turbine generator set is further controlled.
In this embodiment, the variable pitch controller 11 is a programmable controller, and the variable pitch driver 21 is an AC-AC type alternating current variable frequency driver.
Because the cabin 1 is only internally provided with the variable pitch controller 11, when debugging and maintaining personnel search faults, the faults can be directly inquired in the cabin 1 without entering the hub 2, so that the difficulty of fault inquiry is greatly reduced, and the speed and the efficiency of fault troubleshooting are improved.
In the embodiment, the main power supply and the standby power supply are combined for power supply, and the normal power supply is not influenced when any power supply fails, so that the power supply safety of the variable pitch system is ensured.
The main power supply unit 23 includes a main power supply 231, an input reactor 232, and a main power supply switch 233, the main power supply 231 is connected to the switching power supply 25 via the input reactor 232, and the main power supply switch 233 is connected between the main power supply 231 and the input reactor 232. The input reactor 232 can limit the current impact caused by the sudden change of the voltage of the power grid and the overvoltage operation, effectively protect the variable pitch driver 21, improve the power factor of the variable pitch driver 21 and inhibit the harmonic current product characteristics of the variable pitch driver 21 input into the power grid: the noise of the variable pitch motor 22 is reduced, and the eddy current loss is reduced.
Further, a lightning arrester 234 is connected to the main power supply 231. The lightning protection device 234 can effectively protect equipment, and once abnormal voltage occurs, the lightning protection device 234 acts to protect the equipment.
The backup power supply unit 24 includes a super capacitor 241, a fuse 242, and a backup power switch 243, the super capacitor 241 is connected to the switching power supply 25 through the fuse 242, and the backup power switch 243 is connected between the super capacitor 241 and the fuse 242. When the current exceeds a predetermined value, the fuse 242 fuses the fuse element by heat generated by itself to open the circuit, thereby protecting the fuse element.
If the variable pitch drive 21 fails, a fault signal is output, the relay 26 is electrified to work, the main power supply unit 23 and the standby power supply unit 24 are switched on, the power supply unit directly supplies power to the variable pitch motor, and the variable pitch motor 22 drives the fan blades 28 to return to a safe position, so that the defect that some variable pitch systems completely depend on the variable pitch drive 21 for driving control of the variable pitch motor 22 is overcome, the safety of the variable pitch system and even the whole unit can be improved, and the environment adaptability of the fan is improved.
In addition, each gear transmission mechanism 27 is connected with a heater 7, and a temperature and humidity controller 8 is connected between the heater 7 and the fan blade 28. Temperature and humidity sensing of an external environment is used through the temperature and humidity controller 8, the gear transmission mechanism 27 is preheated through the heater 7, low-temperature starting capacity and reliability of the gear transmission mechanism 27 are enhanced, low-temperature starting time of the wind turbine generator is greatly shortened, the fault rate of the whole machine is reduced, labor intensity of field workers is reduced, and the device is particularly suitable for popularization and application in alpine regions.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a wind generating set becomes oar system frequency conversion controlling means, includes cabin and hub, its characterized in that: a cabin control cabinet is arranged in the cabin, a pitch controller is arranged in the cabin control cabinet, a pitch system cabinet is arranged in the hub, three pitch drivers, three pitch motors, three main power supply units, three standby power supply units, three switch power supplies and three relays are arranged in the pitch system cabinet, a slip ring is arranged between the cabin and the hub, the pitch controller is connected with the input end of the slip ring through a rear connecting rod, the output end of the slip ring is respectively connected with the three pitch drivers through a front connecting rod, each pitch driver is respectively connected with one pitch motor, the pitch motors are connected with blades through a gear transmission mechanism, the input end of each switch power supply is respectively connected with one main power supply unit and one standby power supply unit, a power supply contactor is connected between the main power supply unit and the standby power supply unit, and the output end of each switch power supply is respectively connected with, a relay is connected between the variable pitch driver and the variable pitch motor.
2. The variable frequency control device of the wind generating set pitch system according to claim 1, characterized in that: each gear transmission mechanism is connected with a heater, and a temperature and humidity controller is connected between the heater and the fan blades.
3. The variable frequency control device of the wind generating set pitch system according to claim 1, characterized in that: the main power supply unit comprises a main power supply, an input reactor and a main power supply switch, wherein the main power supply is connected with a switch power supply through the input reactor, and the main power supply switch is connected between the main power supply and the input reactor.
4. The variable frequency control device of the wind generating set pitch system according to claim 3, characterized in that: the main power supply is connected with a lightning protection device.
5. The variable frequency control device of the wind generating set pitch system according to claim 1, characterized in that: spare power supply unit includes super capacitor, fuse and stand-by power switch, super capacitor passes through the fuse and connects switching power supply, stand-by power switch connects between super capacitor and the fuse.
6. The variable frequency control device of the wind generating set pitch system according to claim 1, characterized in that: the variable pitch controller is a programmable controller.
7. The variable frequency control device of the wind generating set pitch system according to claim 1, characterized in that: the variable pitch drive is an AC-AC type alternating current variable frequency drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021340918.8U CN212744206U (en) | 2020-07-10 | 2020-07-10 | Variable frequency control device of pitch system of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021340918.8U CN212744206U (en) | 2020-07-10 | 2020-07-10 | Variable frequency control device of pitch system of wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212744206U true CN212744206U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021340918.8U Active CN212744206U (en) | 2020-07-10 | 2020-07-10 | Variable frequency control device of pitch system of wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212744206U (en) |
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2020
- 2020-07-10 CN CN202021340918.8U patent/CN212744206U/en active Active
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