CN202091116U - Feathering control device of wind-driven generator - Google Patents
Feathering control device of wind-driven generator Download PDFInfo
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- CN202091116U CN202091116U CN2011201466049U CN201120146604U CN202091116U CN 202091116 U CN202091116 U CN 202091116U CN 2011201466049 U CN2011201466049 U CN 2011201466049U CN 201120146604 U CN201120146604 U CN 201120146604U CN 202091116 U CN202091116 U CN 202091116U
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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 feathering control device of a wind-driven generator, which belongs to control devices in the field of wind power generation. The feathering control device consists of a hub fixedly connected with a paddle, a central control cabinet arranged on the hub, shaft control cabinets, a direct-current motor and a transmission device; the central control cabinet is connected with more than one shaft control cabinet; each shaft control cabinet is respectively connected with the motor and the transmission device; the central control cabinet is hexagonal; a PLC (programmable logical controller) control unit is arranged in the central control cabinet; motor drivers are arranged in the shaft control cabinets to drive the direct-current motor; and the transmission device is formed by engaging a speed reducer system fixed on a shaft of the direct-current motor with a gear ring fixed on the hub. By using the feathering control device of the wind-driven generator, which is provided by the utility model, the motor drivers are simplified to a great extent; simultaneously, in an emergency, the motor is supplied with power by using a standby battery power supply necessarily; and the redundant and bored alternating-current/direct-current converting structure of the direct-current motor is omitted, namely, the safety and the reliability of the system are improved.
Description
Technical field
The utility model belongs to the control gear of wind power generation field, particularly relates to a kind of wind-driven generator variable propeller pitch control gear.
Background technique
Along with non-renewable energy resources face exhausted awkward situation at world wide, for satisfying industrialized production and the human lives is required, the people to nuclear energy, solar energy, wind-force, etc. the concern and utilizing day by day of renewable energy sources promote.Wherein, the insecurity of nuclear energy uses is perplexed by people, and the nuclear accident of well-known former Soviet Union Chernobyl and Fukushima, Japan has stayed deep pain to human history; The solar energy photovoltaic utilization utilization ratio is low, and cost is high, and the production process power consumption is huge, and contaminativity is strong, be still waiting promptly one one perfect; Have only wind-power electricity generation to be only a kind of ripe relatively energy development technology that developed, popularization and application is widely arranged.Becoming the oar technology is the mainstream technology of present high-power wind power generation, adopt the wind power generating set that becomes the oar technology can adjust the propeller pitch angle of blade by pitch-controlled system, optimize exerting oneself of wind wheel, improve the characteristics of output power of wind energy conversion system, and eliminate because of of the influence of factors such as air density change to power output.Adopt the wind power generating set of feather technology initiatively to reduce the blast that impeller is born in all-cis oar mode, have that the startup of unit performance is good, output power stable, set structure stressed little, shut down convenient and safe and advantage such as transportation lifting difficulty is little.In addition, can make blade be in the feathering state by pitch-controlled system, like this under situations such as unit breaks down, greatly reduce to act under the damped condition load in the transmission system, the thrust that simultaneously under the extreme wind speeds operating mode, reduces to bear on the wind wheel by feathering, thus the limit load that built bore reduced.Existing pitch-controlled system generally comprises Main Control Tank, and by the axle control case of several parallel connections of Main Control Tank control, as shown in the figure, present Main Control Tank generally all be arranged to square, therefore can only establish the single-chip microcomputer that is used to provide control program in the Main Control Tank, because the structure of single-chip microcomputer is less relatively.But the influence that brings simultaneously is that the control function that can bring of single-chip microcomputer is less.
In addition, in the pitch-variable system of the wind power generating set of extensive use at present, the major function of ups system is: in case the mains supply fault, start to pitch-variable system immediately electric power is provided, pitch-variable system control blade forwards safe position to, so wind electricity change paddle UPS system has very high requirement for energy-storage units.At first, the working environment difference of wind power plant itself is very big, requires the energy-storage units of wind electricity change paddle UPS system to have very strong adaptive capacity to environment, no matter can proper functioning under what operating conditions.Secondly, ups system mainly is to play a part emergency service, and power-on time is not very long, but very big to the demand of power, and this just requires energy-storage units to have high-power in short-term handling capacity.The 3rd, because the increasing typeization of modern blower fan and complicated,, therefore need ups system to have very long working life for the maintenance that reduces blower fan and the replacing of part, and after long-time the use, can keep performance constant substantially, and this wherein topmost be exactly the energy-storage units of UPS.In present ups system.Chargeable storage is the very general energy storage device of a kind of application.As lead-acid battery, cadmium-nickel accumulator, nickel-hydrogen accumulator etc.Batteries to store energy has characteristics such as energy density height, abundant raw materials with low cost, manufacturing technology maturation, can realize mass production.But.Adopt chargeable storage to have certain deficiency, can't well satisfy the requirement of wind electricity change paddle UPS system energy-storage units as the energy-storage units of UPS.At first,, cause the expansion and the contraction of electrode structure, cause the accumulator property decay because storage battery in the course of the work chemical reaction can take place.Because the energy-storage units in the wind electricity change paddle UPS system will constantly absorb and release energy, particularly for uninterruptedly also will often carrying out the degree of depth apart from the power supply of system, the assurance wind electricity change paddle discharges and recharges in the insecure area of mains supply, cause the storage battery shortening in working life, need often to change, increased the cost of system.Secondly,,, the very big battery pack of configuration capacity, increased the cost of system, reduced Economy in this high-power applications occasion of wind electricity change paddle apart from system because the specific power of storage battery is less.At last, because the energy management process of storage battery is very complicated, its efficiency for charge-discharge is lower, need often safeguard or change, and the difficult processing of the metallic material after using, can cause environmental pollution.Using storage battery in the ups system as energy-storage units at wind electricity change paddle, is not very suitable from the economic performance analysis of technical performance.
Summary of the invention
The utility model is intended to overcome the deficiencies in the prior art, and a kind of wind-driven generator variable propeller pitch control gear is provided.
Wind-driven generator variable propeller pitch control gear of the present utility model, be by the wheel hub that is fixedly connected with blade, the middle control cabinet that on wheel hub, is provided with, axle control cabinet, direct current generator and transmission device constitute, the control cabinet is connected with more than one axle control cabinet in described, each axle control cabinet is connected with transmission device with motor respectively, the control cabinet is a Hexagon in described, in middle control cabinet, be provided with the PLC control unit, be provided with motor driver and drive direct current generator in axle control cabinet, transmission device is with the speed reducer system on the direct current arbor of the being fixed on formation that is meshed with gear ring on being fixed on wheel hub.
As further improvement of the utility model; described motor driver connects protective circuit and drives direct current generator and transmission device; also be provided with the charge/discharge unit in parallel with motor driver in the axle control cabinet, an end of charge/discharge unit connects with middle control cabinet, and the other end connects with protective circuit.
As further improvement of the utility model, described charge/discharge unit comprises ultracapacitor, charge-discharge circuit, contactor and control circuit, the input end of the output termination charge-discharge circuit of described ultracapacitor, the output termination dc bus of charge-discharge circuit, contactor is serially connected on the output line of dc bus, the control input end of the output terminal connection control circuit correspondence of the sensor that charge-discharge circuit is embedded, a control output end of control circuit connects the control input end of charge-discharge circuit, and another control output end of control circuit connects the control end of contactor.
As further improvement of the utility model, described control circuit is made up of signal sampling unit, A/D converting unit, user instruction unit, computer control unit and isolation drive unit, wherein the output terminal of sampling unit links to each other with A/D converting unit corresponding input end, the output terminal of A/D converting unit links to each other with calculation control unit, the output terminal of user instruction unit links to each other with the calculation control unit corresponding input end, and the control signal output terminal of calculation control unit links to each other with isolation drive unit corresponding input end.
As further improvement of the utility model, on the output gear of direct current generator, be provided with position transducer, on direct current generator, also be provided with heat portective switch, temperature transducer and heater, temperature transducer, heater and protective switch connect with the PLC control unit.The position signal that position transducer rotates motor shaft is selected to feed back to the PLC control unit by encoder and is handled, and forms position closed loop; Also be provided with velocity transducer on the direct current generator output gear, the ω angular velocity signal that velocity transducer is exported direct current generator feeds back to motor driver and handles the shape speed ring.
As further improvement of the utility model, on the blade transmitting gear, be provided with position transducer, position transducer is connected with the PLC control unit.
As further improvement of the utility model, on three walls of space on the casing of middle control cabinet, be respectively equipped with control interface and be connected with the control interface of axle control cabinet.
Wind-driven generator variable propeller pitch control gear of the present utility model adopts several wheelbases is all adopted the same structure setting, has realized the standardization and the generalization of wheelbase, is convenient to management and safeguards; Ultracapacitor as energy-storage units, for providing power, is supported the dc bus of wind power pitch-controlled system.Specific power is big, the speed that discharges and recharges is fast because ultracapacitor has, recycle advantages such as the life-span is long, add and discharge and recharge control strategy efficiently, can increase substantially the technical performance and the economic performance of system, can give full play to that its specific power is big, the speed that discharges and recharges is fast, have extended cycle life and advantage that energy storage efficiency is high, make energy storage device have good technical performance.Because the unsteady flow control action of charge-discharge circuit, the terminal voltage of ultracapacitor and DC bus-bar voltage can be very different, and are satisfying under the preceding topic of same power demand, and the capacity usage ratio of ultracapacitor greatly improves, reduce installed capacity, reduced system cost.This device uses simple, and the user only need be connected on device on the dc bus and handle the open and close button and just can control the operation of whole device and stop, and concrete working procedure is all realized by software control.
Wind-driven generator variable propeller pitch control gear of the present utility model, the driving of blade are realized that by direct current generator owing to be linearity control, control characteristic is more stable, and therefore AC motor converter plant complex structure has in the past simplified motor driver to a great extent; Simultaneously, motor need be powered with the reserve battery power supply in urgency, and direct current generator has omitted superfluous tired friendship/straight transformational structure, has promptly improved the Security and the reliability of system.
Description of drawings
Fig. 1 is the structural representation of control cabinet in the utility model;
Fig. 2 is the structural representation of axle control cabinet;
Fig. 3 is a structure principle chart of the present utility model;
Fig. 4 is the structure principle chart of charge/discharge unit;
Fig. 5 is the structural representation of control circuit in the charge/discharge unit;
Fig. 6 is the structure principle chart of the utility model direct current generator and driving mechanism.
Embodiment
Wind-driven generator variable propeller pitch control gear of the present utility model as shown in Figure 1 and Figure 2, is to be made of the wheel hub 2 that is fixedly connected with blade 1, the middle control cabinet 3 that is provided with on wheel hub 2, axle control cabinet 4, direct current generator 5 and transmission device.Control cabinet 3 is connected with more than one axle control cabinet 4 in described, as shown in Figure 3, each axle control cabinet 4 is connected with transmission device with motor 5 respectively, control cabinet 3 is a Hexagon in described, in middle control cabinet 3, be provided with PLC control unit 6, be provided with motor driver 7 and drive direct current generators 5 in axle control cabinet 4, transmission device is with the speed reducer system 8 on 5 in the direct current generator of the being fixed on formation that is meshed with gear ring 9 on being fixed on wheel hub 2.
Described motor driver 7 connects protective circuits 10 and drives direct current generator 5 and transmission devices, also is provided with the charge/discharge unit 11 in parallel with motor driver 7 in the axle control cabinet 4, and an end of charge/discharge unit 11 connects with middle control cabinet 3, and the other end connects with protective circuit 10.Charge/discharge unit is after the PLC control unit provides instruction, and the control rechargeable battery set is charged.
Described charge/discharge unit 11 comprises ultracapacitor 13, charge-discharge circuit 14, contactor 15 and control circuit 16, the input end of the output termination charge-discharge circuit 14 of described ultracapacitor 13, the output termination dc bus of charge-discharge circuit 14, contactor 15 is serially connected on the output line of dc bus, the control input end of output terminal connection control circuit 16 correspondences of the sensor 17 that charge-discharge circuit 14 is embedded, a control output end of control circuit 16 connects the control input end of charge-discharge circuit 14, another control output end of control circuit 16 connects the control end of contactor 15, as shown in Figure 5.
Control circuit is made up of signal sampling unit, A/D converting unit, user instruction unit, computer control unit and isolation drive unit, wherein the output terminal of sampling unit links to each other with A/D converting unit corresponding input end, the output terminal of A/D converting unit links to each other with calculation control unit, the output terminal of user instruction unit links to each other with the calculation control unit corresponding input end, the control signal output terminal of calculation control unit links to each other with isolation drive unit corresponding input end, as shown in Figure 5.
On the output gear of direct current generator 5, be provided with position transducer 12; on direct current generator 5, also be provided with heat portective switch; temperature transducer and heater; temperature transducer, heater and protective switch connect with the PLC control unit; as shown in Figure 6; the position signal that position transducer rotates motor shaft is selected to feed back to the PLC control unit by encoder and is handled, and forms position closed loop.Be provided with position transducer 18 on the blade transmitting gear, position transducer 18 is connected with the PLC control unit; Also be provided with velocity transducer on the direct current generator output gear, the ω angular velocity signal that velocity transducer is exported direct current generator feeds back to motor driver and handles the shape speed ring.
Being respectively equipped with control interface 19 on three walls of space on the casing of middle control cabinet 3 is connected with the control interface 20 of axle control cabinet 4.The outside of other three walls of space is provided with lighting burner 22 on the middle control cabinet casing, and its inboard is provided with heater 21.Lighting burner 22 is used in order to keep in repair time illumination.
After this device comes into operation, its working procedure is, at first detect each systematic parameter,, select suitable charging current according to the energy energy storage situation of ultracapacitor, charge to ultracapacitor by charge-discharge circuit by the dc bus end, when the energy of bank of super capacitors storage hour, adopt big electric current quick charge, when the time near the fullcharging state, adopt low current charge, to avoid overcharging of super capacitor group.After ultracapacitor stores full energy, stop its charging, but after bank of super capacitors consumed portion of energy owing to self discharge, control circuit was controlled charge-discharge circuit again and was used dc bus that ultracapacitor is charged.
Control circuit detects the voltage of dc bus end, when dropping into certain numerical value, stop ultracapacitor being charged, if the dc bus terminal voltage continues to drop to certain numerical value, then by charge-discharge circuit it is powered by ultracapacitor, the size of output power will be decided on the variance ratio of dc bus power, so that busbar voltage maintains in certain scope.Recover just often when control circuit detects DC bus-bar voltage, stop the power supply of the paired dc bus end of bank of super capacitors.
When grid power blackout,, when bank of super capacitors is powered to the dc bus end by charge-discharge circuit, only guarantee the requirement of dc bus end lowest power in order to prolong the operating time of whole wind electricity change paddle UPS system.Along with the continuation of ultracapacitor discharge process, change the series and parallel composite structure of ultracapacitor inside, so that keeping the higher voltage level, bank of super capacitors realizes the dc bus end is got continued power.
In to the bank of super capacitors charging and discharging process, constantly detector temperature is suitably adjusted power output or input size, the heating of bank of super capacitors is controlled within the specific limits, to improve the working life of bank of super capacitors.When abnormal conditions such as voltage jump occurring when bank of super capacitors, disconnect whole system, and the prompting user.
Claims (7)
1. wind-driven generator variable propeller pitch control gear, be by the wheel hub (2) that is fixedly connected with blade (1), go up the middle control cabinet (3) that is provided with at wheel hub (2), axle control cabinet (4), direct current generator (5) and transmission device constitute, control cabinet (3) is connected with more than one axle control cabinet (4) in it is characterized in that, each axle control cabinet (4) is connected with transmission device with motor (5) respectively, control cabinet (3) is a Hexagon in described, in middle control cabinet (3), be provided with PLC control unit (6), be provided with motor driver (7) and drive direct current generator (5) in axle control cabinet (4), transmission device is with the speed reducer system (8) on direct current generator (5) axle of the being fixed on formation that is meshed with gear ring (9) on being fixed on wheel hub (2).
2. wind-driven generator variable propeller pitch control gear as claimed in claim 1; it is characterized in that described motor driver (7) connects protective circuit (10) and drives direct current generator (5) and transmission device; also be provided with the charge/discharge unit (11) in parallel in the axle control cabinet (4) with motor driver (7); one end of charge/discharge unit (11) connects with middle control cabinet (3), and the other end connects with protective circuit (10).
3. wind-driven generator variable propeller pitch control gear as claimed in claim 2, it is characterized in that described charge/discharge unit (11) comprises ultracapacitor (13), charge-discharge circuit (14), contactor (15) and control circuit (16), the input end of the output termination charge-discharge circuit (14) of described ultracapacitor (13), the output termination dc bus of charge-discharge circuit (14), contactor (15) is serially connected on the output line of dc bus, the control input end that the output terminal connection control circuit (16) of the sensor (17) that charge-discharge circuit (14) is embedded is corresponding, a control output end of control circuit (16) connects the control input end of charge-discharge circuit (14), and another control output end of control circuit (16) connects the control end of contactor (15).
4. wind-driven generator variable propeller pitch control gear as claimed in claim 3, it is characterized in that control circuit (16) is made up of signal sampling unit, A/D converting unit, user instruction unit, computer control unit and isolation drive unit, wherein the output terminal of sampling unit links to each other with A/D converting unit corresponding input end, the output terminal of A/D converting unit links to each other with calculation control unit, the output terminal of user instruction unit links to each other with the calculation control unit corresponding input end, and the control signal output terminal of calculation control unit links to each other with isolation drive unit corresponding input end.
5. as claim 1 or 2 or 3 or 4 described wind-driven generator variable propeller pitch control gear; it is characterized in that on the output gear of direct current generator (5), being provided with position transducer (12); on direct current generator (5), also be provided with heat portective switch; temperature transducer and heater, temperature transducer, heater and protective switch connect with the PLC control unit.
6. as claim 1 or 2 or 3 or 4 described wind-driven generator variable propeller pitch control gear, it is characterized in that being provided with position transducer (18) on the blade transmitting gear, position transducer (18) is connected with the PLC control unit.
7. as claim 1 or 2 or 3 or 4 described wind-driven generator variable propeller pitch control gear, it is characterized in that on three walls of space on the casing of middle control cabinet (3), being respectively equipped with control interface (19) and be connected with the control interface (20) of axle control cabinet (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201466049U CN202091116U (en) | 2011-05-10 | 2011-05-10 | Feathering control device of wind-driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201466049U CN202091116U (en) | 2011-05-10 | 2011-05-10 | Feathering control device of wind-driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN202091116U true CN202091116U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201466049U Expired - Fee Related CN202091116U (en) | 2011-05-10 | 2011-05-10 | Feathering control device of wind-driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202091116U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306898A (en) * | 2013-07-08 | 2013-09-18 | 南车株洲电力机车研究所有限公司 | Pitch system for megawatt wind generating set and pitch control method thereof |
| CN105257472A (en) * | 2015-11-06 | 2016-01-20 | 湘电风能有限公司 | Safety control method for direct-drive fan direct-current pitch varying system |
-
2011
- 2011-05-10 CN CN2011201466049U patent/CN202091116U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306898A (en) * | 2013-07-08 | 2013-09-18 | 南车株洲电力机车研究所有限公司 | Pitch system for megawatt wind generating set and pitch control method thereof |
| CN103306898B (en) * | 2013-07-08 | 2016-07-27 | 南车株洲电力机车研究所有限公司 | A kind of MW class wind turbine group pitch-controlled system and pitch control method thereof |
| CN105257472A (en) * | 2015-11-06 | 2016-01-20 | 湘电风能有限公司 | Safety control method for direct-drive fan direct-current pitch varying system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20120510 |