CN204578109U - A kind of double-fed type converter system and double-feedback aerogenerator group - Google Patents
A kind of double-fed type converter system and double-feedback aerogenerator group Download PDFInfo
- Publication number
- CN204578109U CN204578109U CN201520225584.2U CN201520225584U CN204578109U CN 204578109 U CN204578109 U CN 204578109U CN 201520225584 U CN201520225584 U CN 201520225584U CN 204578109 U CN204578109 U CN 204578109U
- Authority
- CN
- China
- Prior art keywords
- double
- rotor
- fed
- branch road
- converter system
- 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
Links
- 238000004804 winding Methods 0.000 claims abstract description 44
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
A kind of double-fed type converter system and double-feedback aerogenerator group, system comprises current transformer, main circuit breaker, rotor-side switch and net side protective device, the rotor windings of the double-fed generator supporting with double-fed type converter system, the stator winding turn ratio is greater than 1, current transformer machine-side converter connects double-fed generator rotor windings, grid side converter connects the electric Rendezvous Point of rotor branch road, main circuit breaker is connected on the close main circuit of the electric Rendezvous Point of rotor branch road, net side protective device is connected between grid side converter and the electric Rendezvous Point of rotor branch road, rotor-side switch is connected between machine-side converter and double-fed generator rotor windings, double-feedback aerogenerator group comprises tower cylinder, blower fan, gear box, double-fed generator, transformer, vane change device, master controller and above-mentioned double-fed type converter system.The utility model reduces existing double-fed type converter system and whole wind turbine generator construction cost, improves system economy; Safe and reliable to operation, easy to use.
Description
Technical field
The utility model relates to a kind of converter system for wind power generation, also relates to the double-feedback aerogenerator group using this converter system.
Background technology
As new forms of energy that are clean, renewable, that have great potential, wind power generation obtains swift and violent development in worldwide.MW class wind turbine group mainly contains double-feedback aerogenerator group and total power formula wind turbine generator.As shown in Figure 1, double-feedback aerogenerator group is primarily of compositions such as tower cylinder (not shown), blower fan, gear box, double-fed generator, double-fed type converter system, transformer, vane change device and master controllers.Wherein, transformer primary side connects the external electrical network of high pressure, and pair side connects the internal electric network of low pressure, and double-fed generator and converter system, at blower fan, between gear box and internal electric network, are the core systems realizing energy converting between mechanical and control.
Be illustrated in figure 2 existing double-fed generator and double-fed type converter system.The armature spindle of double-fed generator and blower fan, gear box are mechanically connected, and accept mechanical energy, stator winding, rotor windings all can be fed to electric energy.Double-fed type converter system generally comprises current transformer, net side fuse FU2, stator contactor K1 and main circuit breaker QF0.Wherein current transformer comprises the machine-side converter and grid side converter that are connected by DC bus, is responsible for the power on process doubly-fed generation machine rotor branch road.The stator winding of double-fed generator is connected to the electric Rendezvous Point of rotor branch road by stator contactor K1, the rotor windings of double-fed generator then needs to be connected to the electric Rendezvous Point of rotor branch road by current transformer, and the electric Rendezvous Point of rotor branch road is connected to the internal electric network of double-feedback aerogenerator group again by main circuit breaker QF0.Usually, between the range of speeds that double-fed generator normally runs is 0.8 to 1.2 times of synchronous speed, namely slip is between 0.2 to-0.2, and between the range of speeds that the limit is run is 0.67 to 1.33 times of synchronous speed, namely slip is between 0.33 to-0.33.According to the power relation characteristic of double-fed generator, namely the ratio of rotor processing power and stator processing power is that it runs the absolute value of slip, therefore converter subsystem needs maximum power to be processed to be about 1/4 of system total power.Meanwhile, the rotor port voltage of double-fed generator and the ratio of stator voltage are the product of rotor windings and the no-load voltage ratio of stator winding and the absolute value of double-fed generator actual motion slip.Usually, the rotor windings of double-fed generator and the no-load voltage ratio of stator winding are about 3:1.Like this, on the range of speeds border that the limit of double-fed generator is run (absolute value of corresponding slip is generally 0.33), the rotor port voltage of double-fed generator and the ratio of stator voltage are near 1, and namely now the numerical value of rotor port voltage and stator voltage and internal electric network voltage is suitable.Usual internal electric network is configured to the alternating current that rated value is 690V, and like this, the voltage of the machine-side converter in current transformer and the required process of grid side converter is all in 690V rank.Above-mentioned design, has fully demonstrated the economy advantage of double-feedback aerogenerator group relative to total power formula wind turbine generator.
Above-mentioned existing double-fed type converter system is when double-feedback aerogenerator group is shut down; stator contactor K1 on stator branch road and main circuit breaker QF0 wherein one of at least must disconnect; otherwise the high rotor voltage (can reach 2100V) caused due to the large-slip state (slip is 1) be connected to residing for the double-fed generator in internal electric network is directly applied to converter subsystem; converter subsystem can be damaged, more serious accident even occurs.Because the wind behaviour fluctuation of part wind energy turbine set is comparatively frequent; this can cause wind turbine generator to open machine, shutdown frequently; and often there is limited machinery and the restriction of electrical action number of times in main circuit breaker QF0; therefore main circuit breaker QF0 generally main defencive function when bearing the system failure and maintenance, stator contactor K1 then bears that wind turbine generator normally opens machine, closed, opening operation (now impulse current is often little) when shutting down.Because the action frequency restriction ratio circuit breaker of contactor can exceed a more than order of magnitude, the designed life of system can be ensured like this.
Above-mentioned existing double-fed type converter system is used widely in wind-powered electricity generation industry, but stator contactor K1 wherein, because its rated current is larger, industrially overall consumption is less, production cost is often higher, have impact on the economy of double-fed type converter system and even whole double-feedback aerogenerator group.For 2.0MW double-fed generator and converter system, generally need use the stator contactor of 2100A, its price is large about more than 30,000 yuans at present, and small area analysis contactor can be higher relative to the action frequency restriction of big current contactor.
Utility model content
One of the technical problems to be solved in the utility model is, provides a kind of double-fed type converter system, overcomes existing stator contactor cost high, affects the defect of converter system and even whole wind turbine generator economy.
Two of the technical problems to be solved in the utility model is, provides a kind of double-feedback aerogenerator group, overcomes existing stator contactor cost high, affects the defect of wind turbine generator economy.
The utility model solves the technical scheme that one of its technical problem adopts: construct a kind of double-fed type converter system, comprise current transformer, main circuit breaker and net side protective device;
This current transformer comprises the machine-side converter and grid side converter that are connected by DC bus, and this machine-side converter connects the rotor windings of double-fed generator, and this grid side converter connects the electric Rendezvous Point of rotor branch road;
This main circuit breaker be connected to the electric Rendezvous Point of rotor branch road near internal electric network side main circuit on;
This net side protective device is connected between this grid side converter and the electric Rendezvous Point of this rotor branch road;
The rotor windings of double-fed generator supporting with described double-fed type converter system and the turn ratio of stator winding are greater than 1;
It is characterized in that, this double-fed type converter system also comprises rotor-side switch, and this rotor-side switch is connected between this machine-side converter and rotor windings of double-fed generator.
In double-fed type converter system of the present utility model, described net side protective device is circuit breaker or fuse.
In double-fed type converter system of the present utility model, comprise capacitance group, this capacitance group is star connection or delta connection, is connected on the three-phase line between the electric Rendezvous Point of described rotor branch road and the stator winding of double-fed generator.
In double-fed type converter system of the present utility model, described rotor-side switch is contactor or thyristor switch.
The utility model solves the technical scheme that its technical problem two adopts: construct a kind of double-feedback aerogenerator group, comprise tower cylinder, blower fan, gear box, double-fed generator, converter system, transformer, vane change device and master controller; The rotor windings of this double-fed generator and the turn ratio of stator winding are greater than 1; This converter system comprises current transformer, main circuit breaker and net side protective device;
This current transformer comprises the machine-side converter and grid side converter that are connected by DC bus, and this machine-side converter connects the rotor windings of double-fed generator, and this grid side converter connects the electric Rendezvous Point of rotor branch road;
This main circuit breaker is connected to the electric Rendezvous Point of rotor branch road on the main circuit of internal electric network side;
This net side protective device is connected between this grid side converter and the electric Rendezvous Point of this rotor branch road;
It is characterized in that, this double-fed type converter system also comprises rotor-side switch, and this rotor-side switch is connected between this machine-side converter and rotor windings of double-fed generator.
In double-feedback aerogenerator group of the present utility model, described net side protective device is circuit breaker or fuse.
In double-feedback aerogenerator group of the present utility model, comprise capacitance group, this capacitance group is star connection or delta connection, is connected on the three-phase line between the electric Rendezvous Point of described rotor branch road and the stator winding of double-fed generator.
In double-feedback aerogenerator group of the present utility model, described rotor-side switch is contactor or thyristor switch.
Implement double-fed type converter system of the present utility model and double-feedback aerogenerator group, compared with the prior art, its beneficial effect is:
1. for double-feedback aerogenerator group, in converter system, between the machine-side converter of current transformer and the rotor windings of double-fed generator, rotor-side switch is set, because current transformer needs maximum power to be processed to be only about 1/4 of system total power, therefore the switching current grade be arranged on the rotor branch road of double-fed generator is much smaller than the switching current grade be arranged on doubly-fed generation machine stator branch road, making the utility model be arranged on the switch price of generator amature side will far below the switch price being arranged on generator unit stator side, thus reduce the construction cost of existing converter system and whole wind turbine generator, improve system economy, for 2.0MW double-fed type converter system, its rotor-side rated current can reach 520A, the rotor contact device of 630A can be used, its price is at present at about 0.5 ten thousand yuan, and the price of the stator contactor of the 2100A that existing system generally need adopt is greatly about more than 30,000 yuan, and small area analysis contactor can be higher relative to the action frequency restriction of big current contactor, therefore its economy is appreciable,
2. system cloud gray model is safe and reliable; realized the connecting and disconnecting of current transformer and double-fed generator by the rotor-side switch on the road of the rotor arranged when wind turbine generator normally opens machine, shutdown; then can be realized disconnecting with the safety of electrical network by main circuit breaker when system overhaul, easy to use.
Accompanying drawing explanation
Fig. 1 is double-feedback aerogenerator group basic composition structural representation.
Fig. 2 is the structural representation that existing double-fed type converter system adds double-fed generator.
Fig. 3 is the structural representation that the utility model double-fed type converter system adds double-fed generator.
Fig. 4 is the structural representation that the utility model double-fed type converter system embodiment one adds double-fed generator.
Fig. 5 is the structural representation that the utility model double-fed type converter system embodiment two adds double-fed generator.
Fig. 6 is the structural representation that the utility model double-fed type converter system embodiment three adds double-fed generator.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 3, double-fed type converter system of the present utility model comprises current transformer, main circuit breaker 10 (QF0), net side protective device 16 and rotor-side switch 12.The rotor windings of double-fed generator 100 supporting with double-fed type converter system and the turn ratio of stator winding are greater than 1.
Current transformer comprises the machine-side converter 13 and grid side converter 15 that are connected by DC bus 14, and this machine-side converter 13 connects the rotor windings of double-fed generator 100, and grid side converter 15 connects the electric Rendezvous Point 11 of rotor branch road.
Main circuit breaker 10 is connected to the electric Rendezvous Point 11 of rotor branch road of double-fed generator 100 on the main circuit of internal electric network side.
Net side protective device 16 is connected between grid side converter 15 and the electric Rendezvous Point 11 of rotor branch road.
Rotor-side switch 12 is connected between this machine-side converter and rotor windings of double-fed generator.
Embodiment one
As shown in Figure 4, in the present embodiment, rotor-side switch 12 adopts rotor contact device 121 (K2), and net side protective device 16 adopts net side fuse 161.
By action rotor contact device 121; can reach double-feedback aerogenerator group normally open in machine, stopping process eliminate high induction voltage that double-fed generator large-slip state may cause on double-fed type converter system in the impact of machine-side converter and grid side converter, weaken the action demand to main circuit breaker 10.Action frequency restriction because of contactor is generally far longer than the action frequency restriction of circuit breaker, thus ensures the designed life of double-fed generator and converter system.
Certainly, in the orderly closedown process of double-feedback aerogenerator group, also can according to application characteristic (as comparatively stable in site wind, wind turbine generator is without the need to the wind energy turbine set of frequent start-stop) each all to as described in main circuit breaker 10 perform unconditional opening operation; Or system can shut down the features such as frequency, downtime duration or breaker actuation number of times record to the opening operation of described electing property of main circuit breaker 10 according to reality.
In other embodiments, netting side fuse 161 can adopt net side circuit breaker 162 to replace.
Embodiment two
As shown in Figure 5, in the present embodiment, rotor-side switch 12 adopts rotor contact device 121, and net side protective device 16 adopts net side fuse 161.
In other embodiments, netting side fuse 161 can adopt net side circuit breaker 162 to replace.
The present embodiment is also provided with capacitance group 17, and this capacitance group adopts star connection, is connected on the three-phase line between the electric Rendezvous Point 11 of rotor branch road and the stator winding of double-fed generator 100.
Described capacitance group 17 being articulated in the capacity current produced after on the three-phase line between the electric Rendezvous Point of rotor branch road 11 and the stator winding of double-fed generator 100 is designed to suitable with described double-fed generator stator side exciting current; like this; following technique effect can be reached: after double-feedback aerogenerator group orderly closedown; disconnect rotor contact device 121; main circuit breaker 10 can be kept to close; the capacity current basic neutralisation that the exciting current that now stator winding of double-fed generator is asked for can be produced by capacitance group, thus substantially additional effect is not produced to external system.
In addition; after wind turbine generator orderly closedown, grid side converter also can be kept to maintain and to run, allow it export a certain amount of capacitive reactive power electric current; the capacity current that the above-mentioned capacitance group of all or part of replacement produces, equally for exciting current that the stator winding of offsetting double-fed generator is asked for.
In other embodiments, the capacitance group 17 of star connection can adopt the capacitance group of delta connection to replace.
Embodiment three
As shown in Figure 6, in the present embodiment, rotor-side switch 12 adopts rotor thyristor switch 122 (T2), and net side protective device 16 adopts net side fuse 162.
Because doubly-fed generation machine rotor branch current is generally about 1/3 of stator side branch current, therefore adopt the three-phase bidirectional switch be made up of thyristor inverse parallel, the present embodiment can reach the technique effect similar with embodiment one and economic benefit.
In other embodiments, rotor-side switch 12 can adopt other can the switch of frequent movement.
In other embodiments, netting side fuse 162 can adopt net side circuit breaker 161 to replace.
In other embodiments, also can arrange capacitance group, capacitance group adopts star connection, on the three-phase line between the stator winding being connected to main circuit breaker 10 and double-fed generator 100.
In other embodiments, the capacitance group of star connection can adopt the capacitance group of delta connection to replace.
Double-feedback aerogenerator group of the present utility model comprises tower cylinder, blower fan, gear box, double-fed generator, converter system, transformer, vane change device and master controller.The annexation of tower cylinder, blower fan, gear box, double-fed generator, converter system, transformer, vane change device and master controller is prior art, converter system adopts above-mentioned double-fed type converter system of the present utility model, its structure and conversion thereof, as above-mentioned, do not repeat them here.
Claims (10)
1. a double-fed type converter system, comprises current transformer, main circuit breaker and net side protective device;
This current transformer comprises the machine-side converter and grid side converter that are connected by DC bus, and this machine-side converter connects the rotor windings of double-fed generator, and this grid side converter connects the electric Rendezvous Point of rotor branch road;
This main circuit breaker be connected to the electric Rendezvous Point of rotor branch road near internal electric network side main circuit on;
This net side protective device is connected between this grid side converter and the electric Rendezvous Point of this rotor branch road;
The rotor windings of double-fed generator supporting with described double-fed type converter system and the turn ratio of stator winding are greater than 1;
It is characterized in that, this double-fed type converter system also comprises rotor-side switch, and this rotor-side switch is connected between this machine-side converter and rotor windings of double-fed generator.
2. double-fed type converter system as claimed in claim 1, it is characterized in that, described net side protective device is circuit breaker or fuse.
3. double-fed type converter system as claimed in claim 1, it is characterized in that, comprise capacitance group, this capacitance group is star connection or delta connection, is connected on the three-phase line between the electric Rendezvous Point of described rotor branch road and the stator winding of double-fed generator.
4. double-fed type converter system as claimed in claim 2, it is characterized in that, comprise capacitance group, this capacitance group is star connection or delta connection, is connected on the three-phase line between the electric Rendezvous Point of described rotor branch road and the stator winding of double-fed generator.
5. the double-fed type converter system as described in one of Claims 1-4, is characterized in that, described rotor-side switch is contactor or thyristor switch.
6. a double-feedback aerogenerator group, comprises tower cylinder, blower fan, gear box, double-fed generator, converter system, transformer, vane change device and master controller; The rotor windings of this double-fed generator and the turn ratio of stator winding are greater than 1; This converter system comprises current transformer, main circuit breaker and net side protective device;
This current transformer comprises the machine-side converter and grid side converter that are connected by DC bus, and this machine-side converter connects the rotor windings of double-fed generator, and this grid side converter connects the electric Rendezvous Point of rotor branch road;
This main circuit breaker is connected to the electric Rendezvous Point of rotor branch road on the main circuit of internal electric network side;
This net side protective device is connected between this grid side converter and the electric Rendezvous Point of this rotor branch road;
It is characterized in that, this double-fed type converter system also comprises rotor-side switch, and this rotor-side switch is connected between this machine-side converter and rotor windings of double-fed generator.
7. double-feedback aerogenerator group as claimed in claim 6, it is characterized in that, described net side protective device is circuit breaker or fuse.
8. double-feedback aerogenerator group as claimed in claim 6, it is characterized in that, comprise capacitance group, this capacitance group is star connection or delta connection, is connected on the three-phase line between the electric Rendezvous Point of described rotor branch road and the stator winding of double-fed generator.
9. double-feedback aerogenerator group as claimed in claim 7, it is characterized in that, comprise capacitance group, this capacitance group is star connection or delta connection, is connected on the three-phase line between the electric Rendezvous Point of described rotor branch road and the stator winding of double-fed generator.
10. the double-feedback aerogenerator group as described in one of claim 6 to 9, is characterized in that, described rotor-side switch is contactor or thyristor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520225584.2U CN204578109U (en) | 2015-04-15 | 2015-04-15 | A kind of double-fed type converter system and double-feedback aerogenerator group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520225584.2U CN204578109U (en) | 2015-04-15 | 2015-04-15 | A kind of double-fed type converter system and double-feedback aerogenerator group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204578109U true CN204578109U (en) | 2015-08-19 |
Family
ID=53870704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520225584.2U Expired - Fee Related CN204578109U (en) | 2015-04-15 | 2015-04-15 | A kind of double-fed type converter system and double-feedback aerogenerator group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204578109U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734197A (en) * | 2015-04-15 | 2015-06-24 | 深圳市长昊机电有限公司 | Doubly-fed current transformer system and doubly-fed wind power generation unit |
-
2015
- 2015-04-15 CN CN201520225584.2U patent/CN204578109U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734197A (en) * | 2015-04-15 | 2015-06-24 | 深圳市长昊机电有限公司 | Doubly-fed current transformer system and doubly-fed wind power generation unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102155356B (en) | Method for controlling running of wind generating set based on speed-regulating front end of electromagnetic coupler | |
| CN102694382B (en) | Method and arrangement for controlling an operation of an electric energy production facility during a disconnection to a utility grid | |
| CN103795081A (en) | Method for controlling low voltage ride-through of direct-drive type wind power system | |
| CN203967764U (en) | The double mode current transformer of a kind of wind turbine generator | |
| CN204578110U (en) | A kind of converter system and double-feedback aerogenerator group | |
| CN110336326A (en) | Individually directly match double-fed wind-force/hydroelectric power system of high-voltage fence in a kind of stator circuit | |
| CN103016265B (en) | Alternating current pitch control system using electric network to drive emergency feathering | |
| CN103138289B (en) | Real-time digital simulation modeling method of high permeability wind power plant | |
| CN201953562U (en) | Variable propeller pitch control system of wind generator | |
| CN104779639A (en) | Current transformer system and double-fed wind power generator set | |
| Nelson et al. | Fault ride-through capabilities of siemens full-converter wind turbines | |
| CN104734197A (en) | Doubly-fed current transformer system and doubly-fed wind power generation unit | |
| CN204578109U (en) | A kind of double-fed type converter system and double-feedback aerogenerator group | |
| CN201802563U (en) | Full-power squirrel-cage set wind power generation apparatus | |
| CN104979848A (en) | Converter system and double-fed wind turbine generator set shutdown method | |
| CN201789467U (en) | Double-fed wind-driven generation unit low-voltage-ride-through frequency conversion control system | |
| CN201332277Y (en) | Transducer redundant system of large scale wind generating set | |
| CN104022529A (en) | Doubly-fed wind generator low voltage ride through control method based on improved Crowbar | |
| CN207261178U (en) | A kind of wind-driven generator controls simulator | |
| CN101964531A (en) | Low voltage ride through (LVRT) frequency conversion control system of doubly-fed wind generating set | |
| CN202550586U (en) | Switches and dynamic resistors for low-voltage ride through of double-fed-type wind driven generator set | |
| CN113236525B (en) | Method for transforming steam-driven water-feeding pump into double-fed motor-driven water-feeding pump and starting method | |
| Chen et al. | Stability improvement of wind turbine systems by STATCOM | |
| CN202550956U (en) | High-power permanent magnetic wind-turbine generator set for multiple sets of winding systems | |
| CN106451558A (en) | Power network system with large-scale wind power integration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 |