CN204230925U - A kind of pitch-controlled system - Google Patents

A kind of pitch-controlled system Download PDF

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Publication number
CN204230925U
CN204230925U CN201420592909.6U CN201420592909U CN204230925U CN 204230925 U CN204230925 U CN 204230925U CN 201420592909 U CN201420592909 U CN 201420592909U CN 204230925 U CN204230925 U CN 204230925U
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CN
China
Prior art keywords
energy
connects
converter
way
rectifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420592909.6U
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Chinese (zh)
Inventor
赵瑞杰
王艳领
李朝锋
田素立
代兴华
李红刚
朱洪浩
刘德林
王萌
李军克
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Xuji Group Co Ltd
Xuchang Xuji Wind Power Technology Co Ltd
Original Assignee
State Grid Corp of China SGCC
Xuji Group Co Ltd
Xuchang Xuji Wind Power Technology Co Ltd
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Publication date
Application filed by State Grid Corp of China SGCC, Xuji Group Co Ltd, Xuchang Xuji Wind Power Technology Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201420592909.6U priority Critical patent/CN204230925U/en
Application granted granted Critical
Publication of CN204230925U publication Critical patent/CN204230925U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects

Abstract

The utility model relates to a kind of pitch-controlled system, comprise an energy storage device, energy storage device input connects power supply end of incoming cables, output connects change oar drive unit, and energy storage device comprises AC/DC rectifier 4, two-way DC/DC converter 6, energy-storage travelling wave tube 8, DC/AC inverter 9, two-way DC/DC converter 6, energy-storage travelling wave tube 8.Two-way DC/DC converter 6 has two kinds of connected modes: a kind of: the DC side of the DC side of AC/DC rectifier 4, two-way DC/DC converter 6, DC/AC inverter 9 is connected in series successively, and energy-storage travelling wave tube 8 connects two-way DC/DC converter 6; Another kind of: the DC side of AC/DC rectifier 4 connects the DC side of DC/AC inverter 9, and two-way DC/DC converter 6 one end connects the DC side of AC/DC rectifier 4, and the other end connects energy-storage travelling wave tube 8.

Description

A kind of pitch-controlled system
Technical field
The utility model relates to a kind of pitch-controlled system, belongs to technical field of wind power generation.
Background technology
Wind power generation is the important form of Wind Power Utilization, and wind energy is renewable, pollution-free, that energy is large, prospect the is wide energy, greatly develops the strategic choice that clean energy resource is countries in the world.Along with the quickening of world energy consumption, the minimizing of traditional energy reserves, this green energy resource of wind power generation is more and more paid attention to, and has inexhaustible advantage.Countries in the world are all put into effect every policy and are vigorously supported Wind Power Generation Industry, and the Wind Power Generation Industry of China have also been obtained develop rapidly in recent years, and along with grid type Wind turbines becomes the best form of wind-powered electricity generation utilization, domestic and international wind turbine generator progressively develops to maximization aspect.
The development of Large-scale Wind Turbines makes the lasting application of electric variable propeller system be faced with new challenges, at present, in order to stable pitch-controlled system input power, strengthen the safety and reliability of fan paddle-changing system power supply, circuit and slip ring, adopt the mode of the diameter increasing service cable, but this mode also brings very large drawback, such as: the inconvenience of installation, the problem that Wiring technique is complicated, difficulty is large, is difficult to ensure the change oar loading demands becoming oar main electricity.
Utility model content
The purpose of this utility model is to provide a kind of pitch-controlled system, in order to solve at present in order to stable pitch-controlled system input power, strengthen the safety and reliability of fan paddle-changing system power supply, circuit and slip ring, the mode of employing installs inconvenience, the problem of Wiring technique complexity.
For achieving the above object, scheme of the present utility model comprises: a kind of pitch-controlled system, comprises an energy storage device, and energy storage device input connects power supply end of incoming cables, and output connects change oar drive unit.Energy storage device comprises AC/DC rectifier 4, two-way DC/DC converter 6, energy-storage travelling wave tube 8, DC/AC inverter 9; The AC of AC/DC rectifier 4 connects power supply end of incoming cables, and the AC of DC/AC inverter 9 connects change oar drive unit 10; Two-way DC/DC converter 6 adopts any one of following two kinds of connected modes: a kind of: the DC side of the DC side of AC/DC rectifier 4, two-way DC/DC converter 6, DC/AC inverter 9 is connected in series successively, and energy-storage travelling wave tube 8 connects two-way DC/DC converter 6; Another kind of: the DC side of AC/DC rectifier 4 connects the DC side of DC/AC inverter 9, and two-way DC/DC converter 6 one end connects the DC side of AC/DC rectifier 4, and the other end connects energy-storage travelling wave tube 8.
Energy-storage travelling wave tube 8 is a super capacitor, or the series, parallel of two and above super capacitor or connection in series-parallel Hybrid connections.
Energy storage device is assemblied in wind generator unit wheel hub.
Two-way DC/DC converter 6 connects energy-storage travelling wave tube 8 by current-limiting resistance 7.
The utility model provides a kind of pitch-controlled system, comprises an energy storage device, and this energy storage device utilizes AC/DC rectifier, DC/AC inverter to carry out charging and discharging for energy-storage travelling wave tube, and structure is simple, is convenient to install; When meeting certain condition, carry out charging and discharging, certain power buffering is provided to the input power becoming oar drive unit, stabilize the input power of pitch-controlled system, strengthen the safety and reliability of the power supply of fan paddle-changing system, circuit and slip ring, reduce high-power wind turbine set pitch control service cable consumption, solve for meet completely large-scale wind electricity unit electric variable propeller system become oar loading demands and cause service cable diameter to bring greatly installation, Wiring technique problem, ensured the change oar loading demands becoming oar main electricity.
Accompanying drawing explanation
Fig. 1 is the structural representation of pitch-controlled system in embodiment;
Fig. 2 is the simple and easy Transformation Graphs of Fig. 1;
Fig. 3 is that the utility model becomes the another kind of connection layout of slurry system;
Fig. 4 is the flow chart of method of supplying power in embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
A kind of pitch-controlled system, comprises an energy storage device, and energy storage device input connects power supply end of incoming cables, and output connects change oar drive unit, and energy storage device comprises AC/DC rectifier 4, two-way DC/DC converter 6, energy-storage travelling wave tube 8, DC/AC inverter 9; The AC of AC/DC rectifier 4 connects power supply end of incoming cables, and the AC of DC/AC inverter 9 connects change oar drive unit 10.Two-way DC/DC converter 6 adopts any one of following two kinds of connected modes: a kind of: the DC side of the DC side of AC/DC rectifier 4, two-way DC/DC converter 6, DC/AC inverter 9 is connected in series successively, and energy-storage travelling wave tube 8 connects two-way DC/DC converter 6; Another kind of: the DC side of AC/DC rectifier 4 connects the DC side of DC/AC inverter 9, and two-way DC/DC converter 6 one end connects the DC side of AC/DC rectifier 4, and the other end connects energy-storage travelling wave tube 8.
Based on above technical scheme, by reference to the accompanying drawings, following embodiment is provided.
In present embodiment, energy-storage travelling wave tube 8 is for super capacitor.Super capacitor 8 is series, parallel or the connection in series-parallel hybrid combining of ultracapacitor, and ultracapacitor is made up of double electric layer capacitor or electrochemical capacitor.Compared with the battery (such as traditional storage battery) of other type, super capacitor has the advantages such as power density is high, capacity is large, charge/discharge rates is fast, long service life, operating temperature range are wide, non-maintaining, and these advantages make super capacitor be highly suitable in the work condition environment of wind-driven generator to work.
The energy storage device of this change slurry system is formed primarily of super capacitor 8, two-way DC/DC converter 6, AC/DC rectifier 4, DC/AC inverter 9, current-limiting resistance 7 and control module 5.
The parts of this energy storage device are assemblied in the stainless steel cabinet that 1 degree of protection is IP 54, and this cabinet is installed in wheel hub inside.This energy storage device is connected with communication power supply inlet wire port with signal cable by power cable, and the output of energy storage device connects change oar drive unit.Energy storage device comprises AC/DC rectifier 4, two-way DC/DC converter 6, super capacitor 8, DC/AC inverter 9; The AC of AC/DC rectifier 4 connects power supply end of incoming cables, and the AC of DC/AC inverter 9 connects change oar drive unit 10.Two-way DC/DC converter 6 adopts any one of following two kinds of connected modes: a kind of: the DC side of the DC side of AC/DC rectifier 4, two-way DC/DC converter 6, DC/AC inverter 9 is connected in series successively, energy-storage travelling wave tube 8 connects two-way DC/DC converter 6, as shown in Figure 1, 2; Another kind of: the DC side of AC/DC rectifier 4 connects the DC side of DC/AC inverter 9, and two-way DC/DC converter 6 one end connects the DC side of AC/DC rectifier 4, and the other end connects super capacitor 8, as shown in Figure 3.
Fan master control system 1 is connection slip ring 2, current transformer 3 successively, then connects the AC power end of incoming cables of pitch-controlled system 10, control module control connection current transformer 3.Current transformer 3 gathers pitch-controlled system 10 input power current signal, is transferred to the analog signal amount acquisition interface of control module 5 by signal cable; Control module monitors the operating state of AC/DC rectifier 4, DC/AC inverter 9 and two-way DC/DC converter 6 respectively.
Ultracapacitor 8 charge-discharge circuit adopts DC/DC two-way changing circuit.Super capacitor 8 charging circuit electric energy trend is followed successively by pitch-controlled system 10 power supply end of incoming cables, AC/DC rectifier 4, DC/DC converter 6, current-limiting resistance 7, super capacitor 8; Ultracapacitor 8 discharge circuit electric energy trend is followed successively by super capacitor 8, DC/DC converter 6, DC/AC inverter 9, pitch-controlled system 10 power supply end of incoming cables.
The current-limiting resistance 7 of super capacitor 8 charging circuit serial connection, limits current value during charge initiation, prevents immediate current peak value during charge initiation from causing damage to the line related of this energy storage device and device.
Safety switch is equipped with in this energy storage device inside, and safety switch and aerogenerator unit safe chain are serially connected, and control module 5 controls the closed and disconnected of safety switch.When super electric capacity 8 magnitude of voltage is less than minimum definite value, safety switch disconnects, and blower fan has not allowed machine (if blower fan is in stopped status) or required fan parking (if blower fan has been in machine running status).
This energy storage device is mainly used in stable change oar drive unit input power.When become the lateral load of oar drive unit become oar drive unit rated power or be greater than become run in oar drive unit rated power certain limit time, or when the magnitude of voltage of energy-storage travelling wave tube is less than energy-storage travelling wave tube capping value, input power becomes direct current energy through AC/DC rectifier, to ultracapacitor charging, carry out energy storage; When become oar lateral load occur moment short time spikes power and exceed main power supply become oar power setting higher limit time, energy storage device carries out fault offset, is controlled three-phase alternating current, supplies pitch-controlled system by DC/AC inverter by the DC inverter of ultracapacitor.
Stored energy is carried out when blower variable-pitch load is in limits; fault offset is carried out when blower variable-pitch load exceedes limited load; input power is calculated with the line current of pitch-controlled system constant input power voltage between phases and collection; control the energy input and output of energy storage device, protection pitch-controlled system supply line, blower fan slip ring and related electric parts.
The startup charging process of this energy storage device and star t-up discharge process are interlocking logic, stop stopping charging when electric discharge, star t-up discharge when namely starting charging; Star t-up discharge priority, higher than startup charging, such as: when ultracapacitor voltage value is not less than minimum definite value, if detect during charging that change oar power is greater than limit value, then stops charging, star t-up discharge.
Fig. 4 is energy storage device method of supplying power to flow chart.
As shown in Figure 4, step 100 starts for flow process; Step 101 is initialization step, and when performing this step, blower fan is in stopped status, and ultracapacitor voltage value is likely 0V, is placed in by energy storage device to stop charging, stop electric discharge, safety switch off-state, ready for entering controlled circulation work.
After execution of step 101, enter step 102, detect and become oar mains supply current value and super-capacitor voltage value U, calculate and become oar power P; Execution of step 102, enter step 103 and judge whether super-capacitor voltage U is less than the minimum limit value U0 of capacitance voltage (U0 is for ensureing the minimum capacity magnitude of voltage that energy storage device provides firm power to cushion to change oar drive unit), if, enter step 104 to disconnect safety switch, start charging, if not, enter step 105 and close safety switch (allowing blower fan to play machine); Execution of step 105, enters step 106 and judges that whether become oar power P is greater than main power supply change oar power upper limit value P2, if so, enters step 107 and stops charging, star t-up discharge, if not, enter step 109 and stop electric discharge; Execution of step 107, enters step 108 and judges whether become oar power P is less than energy storage for power supply power stagnant ring lower limit P1, if not, return step 107 and continue electric discharge, if so, enter step 109 and stop electric discharge.
Execution of step 109, enters step 110 and judges whether super-capacitor voltage U is less than the stagnant loop voltag upper limit U2 of capacitor charging, if so, enters step 113 and starts charging, if not, enters step 111 and stops charging; Execution of step 113, returns step 106 and judges that whether become oar power P transfinites, and performs star t-up discharge priority higher than the Controlling principle starting charging, guarantee can discharge at any time in the process of charging; Execution of step 111, enters step 112 and judges whether super-capacitor voltage is less than capacitor charging stagnant loop voltag lower limit U1, if so, performs step 113 and starts charging, if not, return step 102 and enter next controlled circulation.Be presented above concrete execution mode, but the utility model is not limited to described execution mode.Basic ideas of the present utility model are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present utility model, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out execution mode when not departing from principle of the present utility model and spirit, amendment, replacement and modification still fall in protection range of the present utility model.

Claims (4)

1. a pitch-controlled system, it is characterized in that, comprise an energy storage device, energy storage device input connects power supply end of incoming cables, output connects change oar drive unit, and described energy storage device comprises AC/DC rectifier (4), two-way DC/DC converter (6), energy-storage travelling wave tube (8), DC/AC inverter (9); The AC of AC/DC rectifier (4) connects power supply end of incoming cables, and the AC of DC/AC inverter (9) connects change oar drive unit (10); Two-way DC/DC converter (6) adopts any one of following two kinds of connected modes: a kind of: the DC side of the DC side of AC/DC rectifier (4), two-way DC/DC converter (6), DC/AC inverter (9) is connected in series successively, and energy-storage travelling wave tube (8) connects two-way DC/DC converter (6); Another kind of: the DC side of AC/DC rectifier (4) connects the DC side of DC/AC inverter (9), two-way DC/DC converter (6) one end connects the DC side of AC/DC rectifier (4), and the other end connects energy-storage travelling wave tube (8).
2. pitch-controlled system according to claim 1, is characterized in that, described energy-storage travelling wave tube (8) is a super capacitor, or the series, parallel of two and above super capacitor or connection in series-parallel Hybrid connections.
3. pitch-controlled system according to claim 2, is characterized in that, described energy storage device is assemblied in wind generator unit wheel hub.
4. pitch-controlled system according to claim 3, is characterized in that, described two-way DC/DC converter (6) connects energy-storage travelling wave tube (8) by current-limiting resistance (7).
CN201420592909.6U 2014-10-14 2014-10-14 A kind of pitch-controlled system Expired - Fee Related CN204230925U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420592909.6U CN204230925U (en) 2014-10-14 2014-10-14 A kind of pitch-controlled system

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104300565A (en) * 2014-10-14 2015-01-21 许继集团有限公司 Pitch system and power supply method of pitch system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104300565A (en) * 2014-10-14 2015-01-21 许继集团有限公司 Pitch system and power supply method of pitch system

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150325

Termination date: 20201014