CN101832233B - Method for regulating power of direct-drive permanent-magnet synchronous wind generator set - Google Patents
Method for regulating power of direct-drive permanent-magnet synchronous wind generator set Download PDFInfo
- Publication number
- CN101832233B CN101832233B CN201010146806.3A CN201010146806A CN101832233B CN 101832233 B CN101832233 B CN 101832233B CN 201010146806 A CN201010146806 A CN 201010146806A CN 101832233 B CN101832233 B CN 101832233B
- Authority
- CN
- China
- Prior art keywords
- torque
- generator set
- speed
- wind
- direct
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 18
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 17
- 230000004308 accommodation Effects 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/48—Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to a method for regulating power of a direct-drive permanent-magnet synchronous wind generator set, which comprises the following steps of: A. acquiring the actual speed n of the generator; B. when n is less than the rated speed, executing step C, else, executing step D; C. computing the current torque given value M of the generator set, wherein when M is not greater than the rated torque, outputting M to the wind generator set, else, assigning M to the rated torque value and outputting M; D. acquiring the last M, wherein when M is smaller than the rated torque, executing step E, and when M reaches the rated torque, executing step F; E. gradually regulating the torque to the rated torque, and keeping the rotation speed at the rated speed; and F. regulating the generator set at the rated speed by using a pitch control system. The invention takes the actual air density of the wind field into account, introduces the optimal power regulation coefficient, simplifies the implementation procedure, conforms to the actual working conditions and realizes the real-time optimum efficiency of the power regulation for the wind generator set in the whole process, thereby overcoming the insufficiencies in the prior regulation method.
Description
Technical field
The present invention relates to a kind of direct-drive permanent magnet synchronous aerogenerator group system, particularly relate to a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set.
Background technique
It is very crucial in a whole wind turbine control system link that power of direct-drive permanent-magnet synchronous wind generator set is regulated, and directly affects machine performance and efficient.The power adjustments of existing direct-drive permanent magnet synchronous aerogenerator group; Usually adopt the control mode of Direct Torque; Its realization mainly is the power curve that provides according to wind power generating set complete system plant; Process form, carry out linear interpolation through form again and calculate actual torque setting value and be delivered to generator set, its shortcoming is that programming code is more; The torque setting value that calculates according to linear interpolation is not actual optimized parameter, but realizes the real-time optimum efficiency of overall process of Generation Control and power adjustments.
This shows that above-mentioned existing method for regulating power of direct-drive permanent-magnet synchronous wind generator set obviously still has inconvenience and defective, and demands urgently further improving in method and use.How to found a kind of more simplification, meet actual conditions, realize the new method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the real-time optimum efficiency of overall process of wind power generating set and power adjustments, real one of the current important subject that belongs to.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set; It is more simplified; Meet actual conditions, realize the real-time optimum efficiency of overall process of wind power generating set and power adjustments, thereby improve the deficiency of existing regulating method.
For solving the problems of the technologies described above, a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention may further comprise the steps the actual speed n that A. obtains generator; B. relatively n and rated speed are as n execution in step C during less than rated speed, execution in step D when n is not less than rated speed; C. the current torque setting value M of calculating generator group when M is not more than nominal torque, exports M to wind power generating set, exports otherwise give M with the nominal torque value again; D. obtain last torque setting value M, relatively M and nominal torque are as M execution in step E during less than nominal torque, execution in step F when M arrives nominal torque; E. progressively regulate torque to nominal torque, keep rotating speed in rated speed; F. pass through pitch-controlled system regulator generator group in rated speed.
As a kind of improvement of the present invention, the formula of described step C is M=K
Optn
2, wherein, K
OptBe the best power accommodation coefficient.
Described K
OptObtain through following steps: C1. obtains root diameter R, wind sweeping area A and best tip speed ratio parameter lambda
OptWith the best power coefficient
C2. obtain wind field air density ρ; C3. basis
Try to achieve K
Opt, wherein
After adopting such design, the present invention at first takes wind field actual air density into account when regulator generator power, has realized the actual optiumum control of unit; Next introduces power beat setting coefficient, has simplified realization flow, the real-time optimal performance of feasible system; Distinguish different operating conditionss according to the nominal parameter of generator set at last and realized the optimum efficiency of overall process, thereby improved the defective of existing method for regulating power of direct-drive permanent-magnet synchronous wind generator set comprehensively, be suitable for practicality more.
Description of drawings
Above-mentioned only is the general introduction of technological scheme of the present invention, understands technological means of the present invention in order can more to know, below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
Fig. 1 is the schematic flow sheet of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention.
Fig. 2 is the acquisition schematic flow sheet of best power accommodation coefficient of the present invention.
Embodiment
See also shown in Figure 1ly, a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention mainly comprises six steps of following A-F.
Steps A. when generator normally moves, obtain the actual speed n of generator.
Step B. is n and rated speed relatively, as n execution in step C during less than rated speed, execution in step D when n is not less than rated speed.
The current torque setting value M of step C. calculating generator group, when M was not more than nominal torque, M was to wind power generating set in output, exports otherwise give M with the nominal torque value again.
Wherein, the formula of M can be M=K
Optn
2, K
OptBe the best power accommodation coefficient.Please cooperate consult shown in Figure 2, K
OptCan obtain through following steps:
C1. according to the blade parameter of this type, obtain root diameter R, wind sweeping area A and best tip speed ratio parameter lambda
OptWith the best power coefficient
C2. obtain wind field air density ρ.ρ can calculate through formula
; Wherein P is an annual mean pressure; R is Blang's lattice constant 287.05, and T is a mean annual temperature.
C3. basis
Try to achieve K
Opt, wherein
Wherein, the derivation of two solution formulas is following in the C3 step:
At first; According to also reduction speed ratio and rotating speed, respective relationships; Calculate the best relation of wind speed and rotating speed; Just according to
rpm of the n unit of getting wherein; The best relation
that draws wind speed and rotating speed is expressed as ν=kn, wherein
Secondly, draw the best relation of torque and rotating speed according to the relation between generator set air horsepower and wind speed, the power factor, promptly according to wind energy and power relation formula
And ν=kn, can obtain
Therefore the best relation formula of torque and rotating speed is expressed as M=K
Optn
2, wherein
Step D. obtains last torque setting value M, and relatively M and nominal torque are as M execution in step E during less than nominal torque, execution in step F when M arrives nominal torque.
Step e. progressively regulate torque to nominal torque, keep rotating speed in rated speed.
Step F. through pitch-controlled system regulator generator group in rated speed.
A kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention; For the synchronous wind-powered electricity generation machine set system of direct-drive permanent-magnetism; When generator set adopts the Direct Torque Control mode; In power adjustment procedure, considered of the influence of wind field actual air density, realized actual optimum performance for wind energy.Simultaneously extrapolate best power accommodation coefficient K according to the tip speed ratio of wind wheel blade and the relation of power factor, wind energy, air horsepower, torque and rotating speed
OptThis parameter provides unit torque setting value M through best power accommodation coefficient and generator speed n, judges the real-time status of blower fan, controls wind power generating set as the case may be.The present invention is based on the real-time optimal performance consideration of the efficient that improves whole unit and overall process; Improved the conventional defective of tabling look-up and combining linear interpolation method to cause; Simplified the program realization flow; Guarantee the real-time optimum performance of wind power generating set overall process operation, improved the efficient of wind power generating set.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (3)
1. method for regulating power of direct-drive permanent-magnet synchronous wind generator set is characterized in that may further comprise the steps:
A. obtain the actual speed n of generator;
B. relatively n and rated speed are as n execution in step C during less than rated speed, execution in step D when n is not less than rated speed;
C. the current torque setting value M of calculating generator group when M is not more than nominal torque, exports M to wind power generating set, exports otherwise give M with the nominal torque value again;
D. obtain last torque setting value M, relatively M and nominal torque are as M execution in step E during less than nominal torque, execution in step F when M arrives nominal torque;
E. progressively regulate torque to nominal torque, keep rotating speed in rated speed;
F. pass through pitch-controlled system regulator generator group in rated speed.
2. a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set according to claim 1 is characterized in that the formula of described step C is: M=K
Optn
2, wherein, K
OptBe the best power accommodation coefficient.
3. a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set according to claim 2 is characterized in that described K
OptObtain through following steps:
C1. obtain root diameter R, wind sweeping area A and best tip speed ratio parameter lambda
OptWith the best power coefficient
C2. obtain wind field air density ρ;
C3. basis
Try to achieve K
Opt, wherein
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010146806.3A CN101832233B (en) | 2010-04-15 | 2010-04-15 | Method for regulating power of direct-drive permanent-magnet synchronous wind generator set |
| PCT/CN2011/000627 WO2011127749A1 (en) | 2010-04-15 | 2011-04-11 | Method for regulating power of direct-drive permanent-magnet synchronous wind power generator set |
| LU91914A LU91914B1 (en) | 2010-04-15 | 2011-04-11 | Method of regulating power of direct drive and permanent magnet synchronous wind powered electricitygenerator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010146806.3A CN101832233B (en) | 2010-04-15 | 2010-04-15 | Method for regulating power of direct-drive permanent-magnet synchronous wind generator set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101832233A CN101832233A (en) | 2010-09-15 |
| CN101832233B true CN101832233B (en) | 2012-08-29 |
Family
ID=42716409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010146806.3A Expired - Fee Related CN101832233B (en) | 2010-04-15 | 2010-04-15 | Method for regulating power of direct-drive permanent-magnet synchronous wind generator set |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101832233B (en) |
| LU (1) | LU91914B1 (en) |
| WO (1) | WO2011127749A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832233B (en) * | 2010-04-15 | 2012-08-29 | 广西银河风力发电有限公司 | Method for regulating power of direct-drive permanent-magnet synchronous wind generator set |
| CN102767473B (en) * | 2012-07-31 | 2015-05-06 | 国电联合动力技术有限公司 | Method, system and device for on-line computation of optimal gain of wind generation set control strategy |
| CN102797629B (en) * | 2012-08-03 | 2014-05-14 | 国电联合动力技术有限公司 | Wind turbine generator control method, controller and control system of wind turbine generator |
| CN102797631B (en) * | 2012-08-24 | 2014-05-14 | 国电联合动力技术有限公司 | Method, system and device for carrying out online self-correcting on optimal gain of wind generating set |
| CN103147916B (en) * | 2013-02-19 | 2015-05-20 | 广东明阳风电产业集团有限公司 | Control method for avoiding natural frequency points of wind power tower |
| CN103174590B (en) * | 2013-04-03 | 2015-12-02 | 无锡中秀驱动技术有限公司 | The regulating method of medium-sized Wind turbine power governor |
| US8803352B1 (en) * | 2013-05-14 | 2014-08-12 | General Electric Compay | Wind turbines and methods for controlling wind turbine loading |
| CN104329224B (en) * | 2014-11-13 | 2017-02-15 | 湖南世优电气股份有限公司 | Variable-rate pitching system and variable-rate pitching method for direct-drive permanent magnet wind generating set |
| CN104632523B (en) * | 2015-01-20 | 2017-05-17 | 三一重型能源装备有限公司 | Wind driven generator and control method and device thereof |
| CN104763584B (en) * | 2015-01-30 | 2017-09-08 | 中船重工(重庆)海装风电设备有限公司 | Generator speed control method and device |
| CN107956637B (en) * | 2016-10-14 | 2019-07-30 | 北京金风科创风电设备有限公司 | Wind-driven generator method for controlling number of revolution, equipment and system |
| CN109973298B (en) * | 2017-12-27 | 2020-03-17 | 新疆金风科技股份有限公司 | Control method and device for wind turbine generator power compensation |
| CN114183313A (en) * | 2022-01-15 | 2022-03-15 | 湖南工程学院 | Wind driven generator tower data acquisition and state monitoring system and method |
| CN115218374A (en) * | 2022-06-30 | 2022-10-21 | 青岛海尔空调器有限总公司 | Air conditioner control method |
| CN115218373A (en) * | 2022-06-30 | 2022-10-21 | 青岛海尔空调器有限总公司 | Air conditioner control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101203674A (en) * | 2005-06-21 | 2008-06-18 | 再生动力系统股份公司 | Method and system for regulating the rotational speed of a rotor of a wind power plant |
| CN101660489A (en) * | 2009-09-23 | 2010-03-03 | 南京盛唐电力控制系统有限公司 | Megawatt wind generating set combination control policy |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008017683A (en) * | 2006-06-05 | 2008-01-24 | Yaskawa Electric Corp | Wind turbine generator control method and apparatus |
| CN100593641C (en) * | 2008-03-21 | 2010-03-10 | 清华大学 | Inverse system robust control method for variable pitch wind power generation system |
| CN101832233B (en) * | 2010-04-15 | 2012-08-29 | 广西银河风力发电有限公司 | Method for regulating power of direct-drive permanent-magnet synchronous wind generator set |
-
2010
- 2010-04-15 CN CN201010146806.3A patent/CN101832233B/en not_active Expired - Fee Related
-
2011
- 2011-04-11 WO PCT/CN2011/000627 patent/WO2011127749A1/en active Application Filing
- 2011-04-11 LU LU91914A patent/LU91914B1/en active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101203674A (en) * | 2005-06-21 | 2008-06-18 | 再生动力系统股份公司 | Method and system for regulating the rotational speed of a rotor of a wind power plant |
| CN101660489A (en) * | 2009-09-23 | 2010-03-03 | 南京盛唐电力控制系统有限公司 | Megawatt wind generating set combination control policy |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-17683A 2008.01.24 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011127749A1 (en) | 2011-10-20 |
| LU91914B1 (en) | 2012-04-15 |
| CN101832233A (en) | 2010-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101832233B (en) | Method for regulating power of direct-drive permanent-magnet synchronous wind generator set | |
| ES2411355T3 (en) | Power restriction in wind turbines | |
| EP3484008B1 (en) | Dynamic control of active and reactive power capability for wind farms | |
| US8053917B2 (en) | Variable-speed power generator and method of controlling the same | |
| US10731630B2 (en) | Extended reaction power for wind farms | |
| US8823193B1 (en) | Method and system for limitation of power output variation in variable generation renewable facilities | |
| CN104092235B (en) | Doubly-fed generator set AC/DC grid-connected system, and method and application | |
| CN105308312A (en) | Wind power plant controller | |
| CN109611270A (en) | A kind of Control of decreasing load method of wind power generating set primary frequency modulation | |
| CN105332853B (en) | Coordinate the control method of wind-driven generator rotating speed and power more than rated wind speed | |
| AU2011319719A1 (en) | Control device for wind power plant and control method for wind power plant | |
| KR101141090B1 (en) | Control device for wind power generator, wind farm, and control method of wind power generator | |
| CN106224275B (en) | A kind of direct air cooling system running optimizatin method | |
| Melício et al. | Doubly fed induction generator systems for variable speed wind turbine | |
| CN105041575A (en) | Multi-motor power generation device and wind power generation unit | |
| CN104564522B (en) | Wind generator set blade operating angle control method | |
| CN104421109A (en) | Heat dissipation device for wind power pitch control system | |
| Rouabhi et al. | Control of the power generated by variable speed wind turbine driving a doubly fed induction generator | |
| CN204851538U (en) | Many motors power generation facility and wind generating set | |
| Atallah et al. | Comparison between wind farm aggregation techniques to analyze power system dynamics | |
| CN104912731B (en) | A kind of wind-driven generator electromechanics separation method based on variable speed | |
| CN110768298A (en) | Improvement method for wind power plant generator tripping measures | |
| KR20120053422A (en) | A fast rotating rotor system for cost reduction of a large horizontal axis wind turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGXI YINHE WIND POWER CO., LTD. Free format text: FORMER OWNER: JIANGSU YINHE CHANGZHENG WIND POWER EQUIPMENT CO., LTD. Effective date: 20120716 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 224600 Jiangsu Province Coastal Economic Development Zone water ring Applicant after: JIANGSU YINHE CHANGZHENG WIND POWER GENERATION EQUIPMENT Co.,Ltd. Address before: 224600 Jiangsu Province Coastal Economic Development Zone water ring Applicant before: Jiangsu Changzheng Wind Power Generation Equipment Co.,Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: JIANGSU CHANGZHENG WIND POWER EQUIPMENT CO., LTD. TO: JIANGSU YINHE CHANGZHENG WIND POWER EQUIPMENT CO., LTD. Free format text: CORRECT: ADDRESS; FROM: 224600 YANCHENG, JIANGSU PROVINCE TO: 536000 BEIHAI, GUANGXI ZHUANG AUTONOMOUS REGION |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20120716 Address after: 536000 building, information center building, Yinhe Software Park, Tibet Road, the Guangxi Zhuang Autonomous Region, Beihai, four Applicant after: Guangxi Yinhe Wind Power Co.,Ltd. Address before: 224600 Jiangsu Province Coastal Economic Development Zone water ring Applicant before: JIANGSU YINHE CHANGZHENG WIND POWER GENERATION EQUIPMENT Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WEIHAI YINHE CHANGZHENG WIND POWER GENERATING EQUI Free format text: FORMER OWNER: GUANGXI GALAXY WIND POWER GENERATION CO., LTD. Effective date: 20121228 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 536000 BEIHAI, GUANGXI ZHUANG AUTONOMOUS REGION TO: 264200 WEIHAI, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121228 Address after: 264200, Shandong Province, Weihai Torch Road, 213 innovation and entrepreneurship base A block, room 1513 Patentee after: WEIHAI YINHE CHANGZHENG WIND POWER EQUIPMENT Co.,Ltd. Address before: 536000 building, information center building, Yinhe Software Park, Tibet Road, the Guangxi Zhuang Autonomous Region, Beihai, four Patentee before: Guangxi Yinhe Wind Power Co.,Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: WEIHAI YINHE CHANGZHENG WIND POWER GENERATING EQUI Effective date: 20130507 Owner name: GUANGXI YINHE WIND POWER CO., LTD. Free format text: FORMER OWNER: WEIHAI YINHE CHANGZHENG WIND POWER GENERATING EQUIPMENT CO., LTD. Effective date: 20130507 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 264200 WEIHAI, SHANDONG PROVINCE TO: 536000 BEIHAI, GUANGXI ZHUANG AUTONOMOUS REGION |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130507 Address after: 536000 building, information center building, Yinhe Software Park, Tibet Road, the Guangxi Zhuang Autonomous Region, Beihai, four Patentee after: Guangxi Yinhe Wind Power Co.,Ltd. Patentee after: WEIHAI YINHE CHANGZHENG WIND POWER EQUIPMENT Co.,Ltd. Address before: 264200, Shandong Province, Weihai Torch Road, 213 innovation and entrepreneurship base A block, room 1513 Patentee before: WEIHAI YINHE CHANGZHENG WIND POWER EQUIPMENT Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20190415 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |