CN203444031U - Modularized multi-level current transformer tester - Google Patents
Modularized multi-level current transformer tester Download PDFInfo
- Publication number
- CN203444031U CN203444031U CN201320467141.5U CN201320467141U CN203444031U CN 203444031 U CN203444031 U CN 203444031U CN 201320467141 U CN201320467141 U CN 201320467141U CN 203444031 U CN203444031 U CN 203444031U
- Authority
- CN
- China
- Prior art keywords
- modular multi
- level converter
- submodule
- output terminal
- level
- 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 - Lifetime
Links
Images
Abstract
The utility model discloses a modularized multi-level current transformer tester comprising the following structures: a voltage regulator with a primary side connected with a power network through a first breaker so as to regulate the voltage of the power network; a first and a second modularized multi-level current transformers, wherein inputs of the first and second modularized multi-level current transformers are respectively connected with secondary sides of the voltage regulator through a second and a third breakers and a first and a second transformers, and DC outputs of the first and second modularized multi-level current transformers are connected respectively through a first and a second DC isolation switches; a DC test loop connected with a DC output of the modularized multi-level current transformer unit through a third DC isolation switch. Based on the modularized multi-level current transformer, the modularized multi-level current transformer tester can realize three function tests of flexible DC power output, stationary wattless generator and DC power, thereby widening the application direction of the modularized multi-level current transformer.
Description
Technical field
The utility model relates to power-supply system technical field, relates in particular to the modular multi-level converter test unit using in a kind of power-supply system.
Background technology
Modularization multi-level converter (Modular Multilevel Converter, MMC) because it has adopted extensive submodule (Sub-modular, SM) many level of cascade structure, can adapt to more neatly higher electric pressure and power requirement, at flexible DC power transmission, static reacance generator, direct supply, in field, be applied gradually in recent years.MMC level step is very little, has good output characteristics, is also easy to build large capacity transverter, and than traditional two level and three-level converter, MMC is more suitable for for high pressure, powerful direct current transportation field.
Technology of HVDC based Voltage Source Converter based on MMC is than traditional HVDC Transmission Technology, the problem that there is no commutation failure, can realize quick decoupling zero meritorious, reactive power controls, simultaneously harmonic content has also obtained reduction, grid-connected at asynchronous interconnected and electricity market support, the distributed power generation of electrical network, be connected and isolate minor scale power net and passive load and have good application prospect to aspects such as big city central concentrated load power supplies.
At present all very single for the test unit function of modular multi-level converter, only can realize the equivalent steady state test of flexible DC power transmission converter valve, and the technical characterstic that lacks the many application directions that possess from modular multi-level converter self, multi-functional expansion designs a set of test unit that can simultaneously take into account flexible DC power transmission, static reacance generator, direct supply three large functions.
In sum, there is following problem in prior art: now for the test unit of modular multi-level converter seldom and function all very single, only can realize the test of flexible DC power transmission converter valve equivalence steady state function, the technical characterstic that lacks the many application directions that possess from modular multi-level converter self, multi-functional expansion designs a set of test unit that can simultaneously take into account flexible DC power transmission, static reacance generator, direct supply three large functions.
Utility model content
Many application directions that the utility model self possesses for modular multi-level converter in prior art, the technical characterstic of multi-functional expansion, has proposed a kind of widely used modular multi-level converter test unit, and it comprises:
Pressure regulator, its former avris is connected on electrical network by the first isolating switch, with the voltage on electrical network, carries out pressure regulation;
The first and second modular multi-level converters, wherein, the input of the first and second modular multi-level converters is connected to respectively the secondary side of described pressure regulator by the second and the 3rd isolating switch and the first and second transformers, and the output of the direct current of described the first and second modular multi-level converters couples together by the first and second direct-current isolating switchs respectively; And
DC experiment loop, it is connected in the direct current output of described modular multi-level converter unit by the 3rd direct-current isolating switch.
Particularly, described the first and second modular multi-level converters comprise A separately, B, on C three-phase, lower six brachium pontis, the input side that A goes up brachium pontis is mutually connected on the input end of the first commutating reactor, the output terminal of described the first commutating reactor is connected at least two submodules of mutually connecting, wherein, output terminal and the B of the submodule of series connection end, the DC voltage electrode side that the submodule output terminal parallel connection corresponding to upper brachium pontis of C two-phase exported as modular multi-level converter, and A descends the input side of brachium pontis to be connected on the second commutating reactor input end mutually, the output terminal of described the second commutating reactor is connected on the submodule of a plurality of mutual series connection, wherein, output terminal and the B of the submodule of series connection end, the output terminal parallel connection of the submodule that the lower brachium pontis of C two-phase is corresponding is as the DC voltage negative side of modular multi-level converter output.
Particularly, it is identical that upper bridge arm topological structure and the described A of described B, C phase goes up bridge arm topological structure mutually, and lower bridge arm topological structure and the described A of described B, C phase descend bridge arm topological structure identical mutually.
Particularly, described submodule comprises the half-bridge structure of upper and lower two IGBT modules composition and DC energy storage electric capacity and the direct current equalizing resistance in parallel with described half-bridge structure, wherein, IGBT module comprises insulated gate bipolar transistor and the diode that inverse parallel is connected with it.
Particularly, described DC experiment loop comprises: the direct current resistance load and the equivalent reactance that are connected in series.
The utility model has brought following beneficial effect:
(1) realize the three kinds of function tests of flexible DC power transmission, static reacance generator, direct supply based on modular multi-level converter, greatly widened the application direction of modular multi-level converter;
(2) hookup based on modular multi-level converter, when realizing flexible DC power transmission and static reacance generation test function, only needs electrical network that the loss of a small amount of electric energy complementary testing device is provided, and has at utmost reduced the power consumption of test unit;
(3) hookup based on modular multi-level converter is when realizing direct supply test function, can complete respectively the direct supply test of the many level current transformers of individual moduleization and the direct supply Parallel test of two modular multi-level converters by switch combination, effectively expand the capacity of direct supply test unit.
Other features and advantages of the utility model will be set forth in the following description, and partly from instructions, become apparent, or understand by implementing the utility model.The purpose of this utility model and other advantages can be realized and be obtained by specifically noted structure in instructions, claims and accompanying drawing.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for instructions,, jointly for explaining the utility model, does not form restriction of the present utility model with embodiment of the present utility model.In the accompanying drawings:
Fig. 1 is the modular multi-level converter test unit circuit diagram according to the utility model embodiment;
Fig. 2 is the modular multi-level converter topological diagram according to the utility model embodiment;
Fig. 3 is the modular multi-level converter submodule topological diagram according to the utility model embodiment;
Fig. 4 is according to the equivalent circuit diagram of the test of flexible DC power transmission back-to-back of the modular multi-level converter of the utility model the first embodiment;
Fig. 5 is according to the equivalent circuit diagram of the point-to-point static reacance generator test of the modular multi-level converter of the utility model the second embodiment.
Embodiment
Below with reference to accompanying drawing, describe embodiment of the present utility model in detail, to the utility model, how application technology means solve technical matters whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each feature in each embodiment of the utility model and each embodiment can mutually combine, and formed technical scheme is all within protection domain of the present utility model.
As shown in Figure 1, wherein shown the modular multi-level converter test unit circuit diagram according to the utility model embodiment.It comprises: pressure regulator TM0, three circuit breaker Q F0, QF1, QF2, two transformer TM1, TM2, two modular multi-level converter MMC1, MMC2, and a DC experiment loop.Wherein, DC experiment loop comprises: three direct-current isolating switch QS1, QS2, QS3, direct current resistance load R and equivalent reactance L.
The input end of circuit breaker Q F0 is connected to three phase network, the output terminal of QF0 is connected to the former avris of pressure regulator TM0, the secondary side joint of pressure regulator TM0 is to circuit breaker Q F1 input end, the output terminal of circuit breaker Q F1 is connected to the former avris of transformer TM1, the secondary side joint of transformer TM1 is to the AC of modular multi-level converter MMC1, and modular multi-level converter MMC1 DC side is connected to the input end of direct-current isolating switch QS1.Meanwhile, the secondary side joint of pressure regulator TM0 is to the input end of circuit breaker Q F2, and the output terminal of circuit breaker Q F2 is connected to the former avris of transformer TM2, and the secondary side joint of transformer TM2 is to the AC of modular multi-level converter MMC2.The DC side of modular multi-level converter MMC2 is connected to the input end of direct-current isolating switch QS2, after the output terminal of direct-current isolating switch QS1 and direct-current isolating switch QS2 is in parallel, be connected to the input end of direct-current isolating switch QS3, the output terminal of direct-current isolating switch QS3 is connected to direct current resistance load R and equivalent reactance L two ends, and direct current resistance load R connects with equivalent reactance L.
The topological structure of two modular multi-level converter MMC1 and MMC2 is identical, as shown in Figure 2.Here for simplicity, only take MMC1 introduces its composition in detail as example.Wherein, modular multi-level converter MMC1 comprises upper and lower totally six brachium pontis of A, B, C three-phase and six commutating reactor L1a, L2a, L1b, L2b, L1c, L2c.Wherein, the input side that A goes up brachium pontis is mutually connected on the input end of the first commutating reactor L1a, the output terminal of the first commutating reactor L1a is connected to n(n >=1) on the submodule SM of individual mutual series connection, wherein, output terminal and the B of the submodule SMn of series connection end, the output terminal parallel connection of the submodule SMn that the upper brachium pontis of C two-phase is corresponding is as the DC voltage electrode side of modular multi-level converter MMC1 output, and A descends brachium pontis input side to be connected on the second commutating reactor L2a input end mutually, the output terminal of the second commutating reactor L2a is connected to n(n >=1) on the submodule of individual mutual series connection, wherein, output terminal and the B of the submodule SMn of series connection end, the output terminal parallel connection of the submodule that the lower brachium pontis of C two-phase is corresponding is as the DC voltage negative side of modular multi-level converter output.In the utility model, it is identical that upper bridge arm topological structure and the A of B, C phase goes up bridge arm topological structure mutually, and lower bridge arm topological structure and the A of B, C phase descend bridge arm topological structure identical mutually.
In test operation, by changing the quantity n of submodule on each brachium pontis, can change neatly output voltage and the power grade of modular multi-level converter.In addition, on each brachium pontis, n submodule is redundancy structure, this topological structure makes the positive and negative DC bus of the modular multi-level converter in the utility model can be applicable to D.C. high voltage transmission occasion, and makes to the utlity model has stronger fault-tolerant ability, thereby realizes failure operation.
In addition, if in reality between each brachium pontis energy uneven, can cause each to have voltage difference between mutually, thereby cause the circulation between each brachium pontis.Here, adopt commutating reactor can effectively suppress above-mentioned circulation, and by controlling this circulation, regulate the voltage of modules, avoid the larger voltage fluctuation of generation between upper and lower bridge arm.In addition, commutating reactor can also prevent the rush of current being caused by superpotential in process of the test, realizes the uneven adjusting automatically of phase current, reaches balanced balanced current, saves energy consumption, the balancing network function of current.
As shown in Figure 3, wherein shown according to the topology diagram of the modular multi-level converter submodule SM of the utility model embodiment.According to the utility model, the half-bridge structure that this submodule SM has adopted upper and lower two insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT) module to form.Wherein, upper IGBT module consists of with the diode D1 that inverse parallel is connected with it insulated gate bipolar transistor T1, and lower IGBT module consists of with the diode D2 that inverse parallel is connected with it insulated gate bipolar transistor T2.And storage capacitor C and direct current equalizing resistance Rc are connected in above-mentioned half-bridge structure two ends in parallel.
the first embodiment
As shown in Figure 4, wherein shown according to the equivalent circuit diagram of the test of flexible DC power transmission back-to-back of the modular multi-level converter of the utility model the first embodiment.
If close circuit breaker QF0, QF1 and QF2, closed direct-current isolating switch QS1, QS2, disconnect direct-current isolating switch QS3, can form the test unit of flexible DC power transmission back-to-back based on modular multi-level converter, wherein circuit breaker Q F1, transformer TM1 and modular multi-level converter MMC1 form current conversion station 1, and circuit breaker Q F2, transformer TM2 and modular multi-level converter MMC2 form current conversion station 2.
The AC of modular multi-level converter MMC1 and modular multi-level converter MMC2 is connected in respectively the secondary side of pressure regulator TM0 in parallel by transformer TM1 and transformer TM2, modular multi-level converter MMC1 adopts and is connected back-to-back with the DC side of modular multi-level converter MMC2.Modular multi-level converter MMC1 and modular multi-level converter MMC2 all can realize active power and carry, and both can be used as power transmitting terminal, also can be used as power interface receiving end.
In the present embodiment, adopt modular multi-level converter MMC1 as power transmitting terminal, modular multi-level converter MMC2 as power interface receiving end, realize active power conveying to modular multi-level converter MMC2 by modular multi-level converter MMC1, and the secondary side at pressure regulator TM0 is carried out power back off, electrical network only needs to provide the loss of a small amount of electric energy complementary testing device, has at utmost reduced the power consumption of test unit.
the second embodiment
As shown in Figure 5, wherein shown according to the equivalent circuit diagram of the point-to-point static reacance generator test of the modular multi-level converter of the utility model the second embodiment.
If close circuit breaker QF0, QF1 and QF2, disconnect direct-current isolating switch QS1, QS2 and QS3, can form the point-to-point static reacance generator test unit based on modular multi-level converter, wherein circuit breaker Q F1, transformer TM1 and modular multi-level converter MMC1 form static reacance generator 1, and circuit breaker Q F2, transformer TM2 and modular multi-level converter MMC2 form static reacance generator 2.
Modular multi-level converter MMC1 and modular multi-level converter MMC2 all can send reactive power, and modular multi-level converter MMC1 and modular multi-level converter MMC2 are connected in respectively the secondary side of pressure regulator TM0 in parallel as two cover static reacance generator ACs by transformer TM1 and transformer TM2.
In the present embodiment, the perception that is set to modular multi-level converter MMC1 transmission capacitive reactive power, modular multi-level converter MMC2 transmission single-candidate is idle, secondary side at pressure regulator TM0 realizes reactive power feed-back compensation, electrical network only needs to provide the loss of a small amount of electric energy complementary testing device, has at utmost reduced the power consumption of test unit.
the 3rd embodiment
The 3rd embodiment of the present utility model provides a kind of direct supply hookup of modular multi-level converter.
As shown in Figure 1, if close circuit breaker QF0, QF1 and QF2, closed direct-current isolating switch QS1, QS2 and QS3.Modular multi-level converter MMC1 and modular multi-level converter MMC2 all can be used as continuously adjustable direct supply, modular multi-level converter MMC1 with modular multi-level converter MMC2 as the identical direct supply of two covers, its AC is connected in respectively the secondary side of pressure regulator TM0 in parallel by transformer TM1 and transformer TM2, its DC side parallel is at direct current resistance load R and equivalent reactance L two ends.
In the present embodiment, modular multi-level converter MMC1 generates identical DC current with modular multi-level converter MMC2 DC side, and its post consumption in parallel is on direct current resistance load R and equivalent reactance L.
As further embodiment of the present utility model, in direct supply hookup, if close circuit breaker QF0 and circuit breaker Q F1, cut-off breaker QF2, closed direct-current isolating switch QS1 and direct-current isolating switch QS3, disconnect direct-current isolating switch QS2, modular multi-level converter MMC1 DC side is connected on direct current resistance load R and equivalent reactance L two ends, direct supply hookup that can many level current transformers of composition moduleization MMC1;
As further embodiment of the present utility model, in direct supply hookup, if close circuit breaker QF0 and circuit breaker Q F2, and cut-off breaker QF1, closed direct-current isolating switch QS2 and direct-current isolating switch QS3, and disconnecting direct-current isolating switch QS1, modular multi-level converter MMC2 DC side is connected on direct current resistance load R and equivalent reactance L two ends, direct supply hookup that can many level current transformers of composition moduleization MMC2.
Although the disclosed embodiment of the utility model as above, the embodiment that described content just adopts for the ease of understanding the utility model, not in order to limit the utility model.Technician under any the utility model in technical field; do not departing under the prerequisite of the disclosed spirit and scope of the utility model; can do any modification and variation what implement in form and in details; but scope of patent protection of the present utility model, still must be as the criterion with the scope that appending claims was defined.
Claims (5)
1. a modular multi-level converter test unit, is characterized in that, described device comprises:
Pressure regulator, its former avris is connected on electrical network by the first isolating switch, with the voltage on electrical network, carries out pressure regulation;
The first and second modular multi-level converters, wherein, the input of the first and second modular multi-level converters is connected to respectively the secondary side of described pressure regulator by the second and the 3rd isolating switch and the first and second transformers, and the output of the direct current of described the first and second modular multi-level converters couples together by the first and second direct-current isolating switchs respectively; And
DC experiment loop, it is connected in the direct current output of described modular multi-level converter unit by the 3rd direct-current isolating switch.
2. modular multi-level converter test unit as claimed in claim 1, it is characterized in that, described the first and second modular multi-level converters comprise A separately, B, on C three-phase, lower six brachium pontis, the input side that A goes up brachium pontis is mutually connected on the input end of the first commutating reactor, the output terminal of described the first commutating reactor is connected at least two submodules of mutually connecting, wherein, output terminal and the B of the submodule of series connection end, the DC voltage electrode side that the submodule output terminal parallel connection corresponding to upper brachium pontis of C two-phase exported as modular multi-level converter, and A descends the input side of brachium pontis to be connected on the second commutating reactor input end mutually, the output terminal of described the second commutating reactor is connected on the submodule of a plurality of mutual series connection, wherein, output terminal and the B of the submodule of series connection end, the output terminal parallel connection of the submodule that the lower brachium pontis of C two-phase is corresponding is as the DC voltage negative side of modular multi-level converter output.
3. modular multi-level converter test unit as claimed in claim 2, it is characterized in that, it is identical that upper bridge arm topological structure and the described A of described B, C phase goes up bridge arm topological structure mutually, and lower bridge arm topological structure and the described A of described B, C phase descend bridge arm topological structure identical mutually.
4. modular multi-level converter test unit as claimed in claim 2, it is characterized in that, described submodule comprises the half-bridge structure of upper and lower two IGBT modules composition and DC energy storage electric capacity and the direct current equalizing resistance in parallel with described half-bridge structure, wherein, IGBT module comprises insulated gate bipolar transistor and the diode that inverse parallel is connected with it.
5. the modular multi-level converter test unit as described in any one in claim 1-4, is characterized in that, described DC experiment loop comprises: the direct current resistance load and the equivalent reactance that are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467141.5U CN203444031U (en) | 2013-08-01 | 2013-08-01 | Modularized multi-level current transformer tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467141.5U CN203444031U (en) | 2013-08-01 | 2013-08-01 | Modularized multi-level current transformer tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203444031U true CN203444031U (en) | 2014-02-19 |
Family
ID=50095068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320467141.5U Expired - Lifetime CN203444031U (en) | 2013-08-01 | 2013-08-01 | Modularized multi-level current transformer tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203444031U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405242A (en) * | 2016-09-29 | 2017-02-15 | 国网山东省电力公司金乡县供电公司 | Isolation switch direct current resistance online monitoring device and the detecting method |
| CN108120878A (en) * | 2017-12-25 | 2018-06-05 | 国网浙江省电力有限公司电力科学研究院 | The D.C. resistance choosing method and system of a kind of Complicated Distribution Network complex optimum device |
| CN109470940A (en) * | 2017-09-07 | 2019-03-15 | 株洲变流技术国家工程研究中心有限公司 | A kind of current transformer full power trial (FPT) device and method |
| CN110517872A (en) * | 2019-09-06 | 2019-11-29 | 贵州电网有限责任公司 | A method of eliminating electric energy loss caused by circulation between transformer in substation |
| CN112130010A (en) * | 2020-08-14 | 2020-12-25 | 许继电气股份有限公司 | Static frequency converter SFC performance detection system under heavy current working condition |
| CN113270941A (en) * | 2021-05-28 | 2021-08-17 | 广东电网有限责任公司 | Low-voltage alternating current-direct current power distribution mode conversion system and time sequence control method and device thereof |
-
2013
- 2013-08-01 CN CN201320467141.5U patent/CN203444031U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405242A (en) * | 2016-09-29 | 2017-02-15 | 国网山东省电力公司金乡县供电公司 | Isolation switch direct current resistance online monitoring device and the detecting method |
| CN106405242B (en) * | 2016-09-29 | 2023-08-15 | 国网山东省电力公司金乡县供电公司 | On-line monitoring device and detection method for direct-current resistance of isolating switch |
| CN109470940A (en) * | 2017-09-07 | 2019-03-15 | 株洲变流技术国家工程研究中心有限公司 | A kind of current transformer full power trial (FPT) device and method |
| CN108120878A (en) * | 2017-12-25 | 2018-06-05 | 国网浙江省电力有限公司电力科学研究院 | The D.C. resistance choosing method and system of a kind of Complicated Distribution Network complex optimum device |
| CN108120878B (en) * | 2017-12-25 | 2020-04-21 | 国网浙江省电力有限公司电力科学研究院 | Direct current resistance selection method and system of complex power distribution network comprehensive optimization device |
| CN110517872A (en) * | 2019-09-06 | 2019-11-29 | 贵州电网有限责任公司 | A method of eliminating electric energy loss caused by circulation between transformer in substation |
| CN112130010A (en) * | 2020-08-14 | 2020-12-25 | 许继电气股份有限公司 | Static frequency converter SFC performance detection system under heavy current working condition |
| CN113270941A (en) * | 2021-05-28 | 2021-08-17 | 广东电网有限责任公司 | Low-voltage alternating current-direct current power distribution mode conversion system and time sequence control method and device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102577066B (en) | Converter with reactive power compensation | |
| CN102460933B (en) | Converter | |
| CN103441691B (en) | A kind of mode of resonance electronic power convertor and converter device | |
| CN203444031U (en) | Modularized multi-level current transformer tester | |
| CN103001242B (en) | A kind of HVDC based on modularization multi-level converter holds concurrently UPFC system | |
| CN203398807U (en) | Power mixed conversion system | |
| Li et al. | DC/DC converter for bipolar LVdc system with integrated voltage balance capability | |
| CN104967141A (en) | Hybrid direct current transmission system | |
| CN203399000U (en) | MMC-based electronic power transformer | |
| CN102231520A (en) | Hybrid DC (direct current) electric power transmission system | |
| CN103208929A (en) | Electronic power transformer based on multi-media card (MMC) | |
| CN103715930B (en) | A kind of method promoting flexible direct current power transmission system capacity | |
| EP2671310A2 (en) | Power electronic converter | |
| CN107834602B (en) | Micro-grid system with micro-source half-bridge converter connected in series | |
| US20160141962A1 (en) | Converter | |
| CN103973121A (en) | Single-phase power electronic transformer | |
| CN102013690A (en) | MMC (multimedia controller)-based modular multi-level transformerless inductive energy storage topological structure | |
| CN108306324B (en) | Modularized centralized energy storage system | |
| CN105191091A (en) | Voltage source converter | |
| CN103427658A (en) | High-voltage DC-DC conversion device based on multi-winding transformer | |
| CN105429177A (en) | Modularized photovoltaic energy storage system | |
| CN105186550A (en) | Improved modularized multi-level converter submodule topology | |
| CN105048854A (en) | Three-phase non-isolated grid connection converter and air-conditioning system | |
| Viktor et al. | Intelligent Transformer: Possibilities and Challenges. | |
| CN205160403U (en) | Energy storage power converting system based on many level of modularization converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |