CN203617721U - Low voltage adjusting and controlling device for wind turbine - Google Patents
Low voltage adjusting and controlling device for wind turbine Download PDFInfo
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- CN203617721U CN203617721U CN201320610010.8U CN201320610010U CN203617721U CN 203617721 U CN203617721 U CN 203617721U CN 201320610010 U CN201320610010 U CN 201320610010U CN 203617721 U CN203617721 U CN 203617721U
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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
Abstract
The utility model discloses a low voltage adjusting and controlling device for a wind turbine. The device comprises a solid switch, a filter circuit, a rectifying circuit, an active power consumption circuit, a first large power inverter and a second large power inverter. Large power electronic converters and the solid switch are mounted between the turbine and the electric grids; when a temporary short circuit fault of an electric system occurs and the voltage of the electric grid is decreased accordingly, active and reactive power support is provided rapidly to maintain constant voltage at the turbine stator-side grid connection points, and the turbine is guaranteed to be on the grid and the grid connection operation is stabilized. The technical problem of low voltage ride through in wind generation is solved, effects of stabilizing the system voltage, suppressing the system voltage fluctuation and improving power quality can be achieved, meanwhile, network consumption is reduced, electricity generation of a wind power plant is increased, impact on the wind turbine device is reduced, and the condition that all wind turbines are cut off simultaneously can be avoided; three phases of the system are controlled independently completely, and conditions of symmetric and asymmetric faults can be treated effectively.
Description
Technical field
The utility model relates to wind power generation low voltage crossing field, relates in particular to wind turbine generator low-voltage regulation device.
Background technology
Along with fast development and the countries in the world attention to renewable energy power generation in policy of wind generating technology, wind power generation has entered a fast-developing phase.Wind energy conversion system single-machine capacity and wind energy turbine set scale and wind power generation shared share in electric power system all increases gradually.Planning construction, traffic control, analysis and Control, economical operation and the quality of power supply that large-scale wind power generation is connected to the grid on electrical network have all produced certain impact.In order to promote the exploitation of wind energy turbine set and to guarantee the safe and stable operation of electric power system, some electric power associations or the grid company of Europe, North America and Australia were all formulated wind farm grid-connected technology guide rule, and China has also promulgated relevant national standard and State Grid Corporation of China's wind energy turbine set access power system technology regulation in 2006.The wind farm grid-connected technical stipulation of various countries relates to some common problems, comprise power control, reactive power/voltage control, low voltage ride-through capability etc., each interconnection technology regulation has all proposed ask for something, wherein low voltage crossing is considered to the challenge to wind-powered electricity generation unit manufacturing technology maximum, therefore solves in the urgent need to a kind of device the problem existing in low voltage crossing field at present.
Utility model content
The purpose of this utility model is to provide wind turbine generator low-voltage regulation device, can cause in electric power system generation temporary short-circuit fault line voltage to decline time, Quick supports for active power and reactive power, maintain the grid-connected point voltage of blower fan stator side constant, thereby guarantee not off-grid of blower fan, and stable being incorporated into the power networks, is conducive to the recovery of line voltage and frequency simultaneously and stablizes.
The utility model adopts following technical proposals:
Wind turbine generator low-voltage regulation device, comprise solid-state switch, filter circuit, rectification circuit, the meritorious circuit that consumes, first power inverter and second largest power inverter, described solid-state switch one end connects generator unit stator side output, the other end connects electrical network incoming end, described filter circuit, rectification circuit, the meritorious circuit that consumes, first power inverter and second largest power inverter are connected in parallel with solid-state switch respectively successively, the output of described first power inverter connects generator power output end, the output of second largest power inverter connects the power input end of electric power system.
Described solid-state switch forms by two antiparallel thyristors are in parallel with normal open switch.
Rectification circuit is made up of three single-phase H bridge circuits, on the brachium pontis of described single-phase H bridge circuit, be two full-control type IGBT switching tube series connection, in three described single-phase H bridge circuits, be connected and form the forward output of rectification circuit by the collector electrode of an IGBT switching tube, be connected and form the negative sense output of rectification circuit by the collector electrode of the 2nd IGBT switching tube.
Described meritorious consumption circuit comprises load resistance and full-control type IGBT switching tube, and the two is connected on the output of rectification circuit.
Described filter circuit includes two inductance and a π type filter circuit that electric capacity forms.
The first described three-phase double winding isolating transformer is identical with rectification circuit with the circuit topological structure of the second three-phase double winding isolating transformer.
Also comprise the first three-phase double winding isolating transformer and the second three-phase double winding isolating transformer, the first three-phase double winding isolating transformer is connected between the output and generator power output end of first power inverter, and the second three-phase double winding isolating transformer is connected between the output of second largest power inverter and the power input end of electric power system.
Described rectification circuit output end is parallel with an electric capacity of voltage regulation.
The utility model adopts high-power electric and electronic current transformer and solid-state switch to be arranged between blower fan and electrical network, cause line voltage to decline during when electric power system generation temporary short-circuit fault, Quick supports for active power and reactive power, constant to maintain the grid-connected point voltage of blower fan stator side, thereby guarantee not off-grid of blower fan, and stable being incorporated into the power networks, is conducive to the recovery of line voltage and frequency simultaneously and stablizes.Not only solve this technical barrier of low voltage crossing existing in wind power generation.And the effect of playing systems stabilisation voltage, suppressing system voltage fluctuation, improve the quality of power supply, reduce via net loss simultaneously, increase wind park generating, reduce the impact to Fan Equipment, more can avoid the wind-powered electricity generation unit situation of complete resection simultaneously.And this system three-phase is independent control completely, can successfully manage symmetrical and asymmetric fault situation.
Accompanying drawing explanation
Fig. 1 is use structural circuit theory diagram of the present utility model.
Embodiment
As shown in Figure 1, low-voltage regulation device for wind turbine generator (being low-voltage crossing means for correcting 2), low-voltage regulation device 2 parts are in parallel with whole system by terminal A, B.Low-voltage crossing means for correcting 2 comprises solid-state switch 4, filter circuit 5, rectification circuit 6, the meritorious circuit that consumes, first power inverter 7 and second largest power inverter 8, described solid-state switch 4 one end connect generator unit stator side output, the other end connects electrical network 3 incoming ends, described filter circuit 5, rectification circuit 6, the meritorious circuit that consumes, first power inverter 7 and second largest power inverter 8 are connected in parallel with solid-state switch 4 respectively successively, the output of described first power inverter 7 connects generator power output end A, the output of second largest power inverter connects the power input end B of electric power system.
Described solid-state switch 4 forms by two antiparallel thyristors are in parallel with normal open switch.Can make corresponding switch motion according to the electric power situation of figure power supply grid in real time.
Described filter circuit 5 includes two inductance and a π type filter circuit that capacitor C 1 forms, and is used for the high order harmonic component that produces while eliminating inverter high frequency conversion, to obtain the sine wave of standard.
Described first power inverter 7 is identical with the circuit topological structure of rectification circuit 6 with second largest power inverter 8.Carry out power conversion for the DC bus-bar voltage providing, to produce reactive power compensation voltage.
Also comprise the first three-phase double winding isolating transformer 9 and the second three-phase double winding isolating transformer 10, the no-load voltage ratio of described isolating transformer is got 1:1.The first three-phase double winding isolating transformer 9 is connected between the output and generator 1 power output end of first power inverter 7, and the second three-phase double winding isolating transformer 10 is connected between the output of second largest power inverter 8 and the power input end of electric power system 3.
The utility model specific works principle is summarized as follows: electrical network normal operation period, low-voltage regulation device 2 is bypassed by solid-state switch 4.Because generator is by revolutional slip adjustment load, generator unit stator frequency is determined by mains frequency, in running, will absorb a large amount of reactive powers, first power inverter 7 can support for reactive power blower fan Quick, maintains the stable of wind power generation power supply access point voltage A.In the time that line voltage breaks down and produces voltage dip, solid-state switch 4 moves rapidly, and low-voltage regulation device B is all put into circuit.In the time that electric network fault occurs, in order not damage the stable operation of wind-powered electricity generation unit and to cause the waste of extensive active power, blower fan group remains on net and normally moves and provide constant active power output, now A point voltage is constant, B point voltage reduces (amplitude is 0.2pu ~ 1pu), fault-signal makes low pressure regulation device 2 all drop into circuit by the bidirectional thyristor conducting of controlling in solid switch 4: now because wind-powered electricity generation unit 1 normally moves, in order to maintain the dynamic power balance of whole system, the active power that wind-powered electricity generation unit 1 provides offers load R by rectification circuit 6 rectifications later and consumes, and now rectification circuit 6 is idle to injecting between two terminals of AB, can regard injection reverse voltage as and be used for maintaining the constant of terminal A voltage, wind-powered electricity generation unit is normally moved.And the pulse signal of the full control device by controlling second largest power inverter 8 injects active power to system simultaneously, to electrical network provide active power adjusting, support and feed back, reached the dynamic equilibrium of whole system power.After line voltage recovers normally, the bidirectional thyristor conducting in solid switch 4 is bypassed rectification circuit 6 and the second largest power inverter 8 in low pressure regulation device 2, and locking pulse sends, and out of service.
Claims (8)
1. wind turbine generator low-voltage regulation device, it is characterized in that: comprise solid-state switch, filter circuit, rectification circuit, the meritorious circuit that consumes, first power inverter and second largest power inverter, described solid-state switch one end connects generator unit stator side output, the other end connects electrical network incoming end, described filter circuit, rectification circuit, the meritorious circuit that consumes, first power inverter and second largest power inverter are connected in parallel with solid-state switch respectively successively, the output of described first power inverter connects generator power output end, the output of second largest power inverter connects the power input end of electric power system.
2. wind turbine generator according to claim 1 low-voltage regulation device, is characterized in that: described solid-state switch forms by two antiparallel thyristors are in parallel with normal open switch.
3. wind turbine generator according to claim 2 low-voltage regulation device, it is characterized in that: rectification circuit is made up of three single-phase H bridge circuits, on the brachium pontis of described single-phase H bridge circuit, be two full-control type IGBT switching tube series connection, in three described single-phase H bridge circuits, be connected and form the forward output of rectification circuit by the collector electrode of an IGBT switching tube, be connected and form the negative sense output of rectification circuit by the collector electrode of the 2nd IGBT switching tube.
4. wind turbine generator according to claim 3 low-voltage regulation device, is characterized in that: described meritorious consumption circuit comprises load resistance and full-control type IGBT switching tube, and the two is connected on the output of rectification circuit.
5. wind turbine generator according to claim 4 low-voltage regulation device, is characterized in that: described filter circuit includes two inductance and a π type filter circuit that electric capacity forms.
6. wind turbine generator according to claim 5 low-voltage regulation device, it is characterized in that: also comprise the first three-phase double winding isolating transformer and the second three-phase double winding isolating transformer, the first three-phase double winding isolating transformer is connected between the output and generator power output end of first power inverter, and the second three-phase double winding isolating transformer is connected between the output of second largest power inverter and the power input end of electric power system.
7. wind turbine generator according to claim 6 low-voltage regulation device, is characterized in that: the first described three-phase double winding isolating transformer is identical with rectification circuit with the circuit topological structure of the second three-phase double winding isolating transformer.
8. wind turbine generator according to claim 5 low-voltage regulation device, is characterized in that: described rectification circuit output end is parallel with an electric capacity of voltage regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320610010.8U CN203617721U (en) | 2013-09-30 | 2013-09-30 | Low voltage adjusting and controlling device for wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320610010.8U CN203617721U (en) | 2013-09-30 | 2013-09-30 | Low voltage adjusting and controlling device for wind turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617721U true CN203617721U (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320610010.8U Expired - Lifetime CN203617721U (en) | 2013-09-30 | 2013-09-30 | Low voltage adjusting and controlling device for wind turbine |
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| CN (1) | CN203617721U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545839A (en) * | 2013-09-30 | 2014-01-29 | 国家电网公司 | Low voltage adjusting and controlling device for wind turbine |
| CN105591392A (en) * | 2016-01-26 | 2016-05-18 | 沈阳工业大学 | Fan reactive power optimization method for improving economic operation of wind power farm |
-
2013
- 2013-09-30 CN CN201320610010.8U patent/CN203617721U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545839A (en) * | 2013-09-30 | 2014-01-29 | 国家电网公司 | Low voltage adjusting and controlling device for wind turbine |
| CN103545839B (en) * | 2013-09-30 | 2016-09-07 | 国家电网公司 | Wind power generating set low-voltage regulation device |
| CN105591392A (en) * | 2016-01-26 | 2016-05-18 | 沈阳工业大学 | Fan reactive power optimization method for improving economic operation of wind power farm |
| CN105591392B (en) * | 2016-01-26 | 2019-03-29 | 沈阳工业大学 | Improve the blower idle work optimization method of wind power plant economical operation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20140528 |
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| CX01 | Expiry of patent term |