CN104319801A - Modular multi-level converter bridge arm circulation control method - Google Patents

Modular multi-level converter bridge arm circulation control method Download PDF

Info

Publication number
CN104319801A
CN104319801A CN201410556820.9A CN201410556820A CN104319801A CN 104319801 A CN104319801 A CN 104319801A CN 201410556820 A CN201410556820 A CN 201410556820A CN 104319801 A CN104319801 A CN 104319801A
Authority
CN
China
Prior art keywords
bridge arm
value
phase
circulation
control method
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.)
Pending
Application number
CN201410556820.9A
Other languages
Chinese (zh)
Inventor
张建
范彩云
司志磊
韩坤
赵洋洋
蒋晶
刘路路
王宇丁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XJ Electric Co Ltd
Original Assignee
XJ Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by XJ Electric Co Ltd filed Critical XJ Electric Co Ltd
Priority to CN201410556820.9A priority Critical patent/CN104319801A/en
Publication of CN104319801A publication Critical patent/CN104319801A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/084—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Abstract

The invention relates to a modular multi-level converter bridge arm circulation control method. The method comprises: collecting all momentary values of bridge arm current for any phase bridge arm, using the average value of all momentary values of the bridge arm current as a set value for PR control and the average value of momentary values of the upper and lower bridge arms of the corresponding phase as a feedback value, inputting the error values of the set value and the feedback value to a PR controller, using the processed output value as the compensation value of the bridge arm voltage of the corresponding phase, and thereby achieving circulation control of the corresponding bridge arm.

Description

A kind of multi-level inverter bridge arm circular current control method
Technical field
The present invention relates to a kind of multi-level inverter bridge arm circular current control method, belong to Power System Flexible power transmission and distribution, electric and electronic technical field.
Background technology
Along with development and the application of power electronic technology in electric power system of all-controlling power electronics device, the Technology of HVDC based Voltage Source Converter based on voltage source converter comes into one's own day by day.Modularization multi-level converter is the one of voltage source converter in flexible direct current power transmission system application, is widely used in high voltage direct current transmission and new forms of energy connecting system with its significant advantage.
MMC topology in the ideal case, thinks that the capacitance voltage of submodule is constant.And actual bridge arm current is made up of AC and DC component, discharge and recharge can be carried out to electric capacity, cause its voltage fluctuation, thus cause three facies unit upper and lower bridge arm voltage sums inconsistent each other, the brachium pontis circulation that final generation is flowed between three facies units, make bridge arm current wave distortion, not only affect capacity and the safe clearance of converter valve, and unnecessary loss can be produced.
When MMC normally runs, due to its working mechanism, the three alternate inside circulation that can there are 2 frequency multiplication negative phase-sequence character, cause bridge arm current to distort, and increase converter loss.MMC circulation is 2 frequency multiplication negative phase-sequence character mainly.Conventional brachium pontis circular current control method takes two conversion of frequency multiplication negative phase-sequence rotating coordinate system and alternate decoupling zeros, based on PI controller, astatic control (coordinate is transformed to dq coordinate system) is carried out to the DC quantity after circulation coordinate transform, the control precision of circulation is met the demands.Under desirable grid conditions, during above-mentioned PI controls, phase place is by taking self-generating strategy, as shown in Figure 1, phase-locked without the need to alternating voltage.But when mains frequency fluctuation or when there is drift, the steady-state behaviour of circulation during the PI control under phase place self-generating strategy and dynamic property is adopted obviously to be deteriorated, when being mains frequency fluctuation as shown in Figure 2, based on phase place self-generating PI controller brachium pontis circulation static Simulation result, when being mains frequency fluctuation as shown in Figure 3, based on phase place self-generating PI controller brachium pontis circulation Dynamic Simulation Results.When fluctuation or drift occur mains frequency, after employing dq conversion decoupling zero, dq axle component is no longer DC quantity, and now PI controller cannot realize the astatic control of circulation, can affect the control precision of brachium pontis circulation largely.
Summary of the invention
The object of this invention is to provide a kind of multi-level inverter bridge arm circular current control method, in order to solve when mains frequency occurs to fluctuate or drift about and be phase-locked without alternating voltage, based on pi regulator, the problem that closed-loop control can affect brachium pontis circulation control precision is largely carried out on circulation.
For achieving the above object, the solution of the present invention comprises: a kind of multi-level inverter bridge arm circular current control method, for arbitrary phase brachium pontis, gather the instantaneous value of all bridge arm current, using the set-point that the mean value of the instantaneous value of described all bridge arm current controls as PR, the mean value of the current instantaneous value of the upper and lower bridge arm of corresponding phase is as value of feedback, the error amount of set-point and value of feedback inputs PR controller, output valve after process, as the offset of corresponding phase bridge arm voltage, realizes the control to corresponding brachium pontis circulation.
The transfer function model of PR controller is
Circular current control method provided by the invention carries out phase-locked calculating without the need to gathering three-phase alternating voltage, only need gather 6 bridge arm current, and averaged is as reference value, and the mean value of each phase upper and lower bridge arm electric current, as value of feedback, can control.And be carry out PR control under three-phase abc rest frame, avoid Coordinate Conversion and alternate decoupling zero, with routine based on PI controller brachium pontis circular current control method compared with, computing is simple without trigonometric function and coordinate transform, enormously simplify the complexity of Digital Implementation, optimize control method, save sensor hardware resource simultaneously.
Particularly when fluctuation or skew occur mains frequency, take PR to control, realize the astatic control of sinusoidal reference signal, and the steady state controling precision of brachium pontis circulation and dynamic property all meet system requirements.
Accompanying drawing explanation
Fig. 1 is based on phase place self-generating PI controller brachium pontis circulation control block diagram;
When Fig. 2 is mains frequency fluctuation, based on phase place self-generating PI controller brachium pontis circulation static Simulation result;
When Fig. 3 is mains frequency fluctuation, based on phase place self-generating PI controller brachium pontis circulation Dynamic Simulation Results;
The modular multilevel converter structure figure of Fig. 4 to be submodule be half-bridge submodule;
Fig. 5 is PR controller integral element Bode diagram;
Fig. 6 is multi-level inverter bridge arm circular current control method schematic diagram;
Fig. 7 is based on PR controller brachium pontis circulation static Simulation result;
When Fig. 8 is mains frequency fluctuation, based on PR controller brachium pontis circulation Dynamic Simulation Results.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
A kind of multi-level inverter bridge arm circular current control method, for arbitrary phase brachium pontis, gather the instantaneous value of all bridge arm current, using the set-point that the mean value of the instantaneous value of all bridge arm current controls as PR, the mean value of the current instantaneous value of the upper and lower bridge arm of corresponding phase is as value of feedback, the error amount of set-point and value of feedback inputs PR controller, and the output valve after process, as the offset of corresponding phase bridge arm voltage, realizes the control to corresponding brachium pontis circulation.
Based on above technical scheme, by reference to the accompanying drawings, provide with next embodiment.
The invention provides a kind of multi-level inverter bridge arm circular current control method, adopt PR to control, be not only applicable to the MMC based on half-bridge submodule, and be equally applicable to the MMC of full-bridge submodule and clamping type submodule formation.
Present embodiment for half-bridge submodule, submodule be the modular multilevel converter structure figure of half-bridge submodule as shown in Figure 4.
Under controlling to take three-phase abc rest frame to the circulation of 2 frequency multiplication negative phase-sequence character of modularization multi-level converter, PR controls.
When adopting PR control strategy, in three-phase abc rest frame, to realize the astatic control of sinusoidal reference signal, according to internal mold theorem, then require the S domain model comprising sinusoidal signal in system open loop transfer function.Set up the transfer function model of PR controller
G ( s ) = k p + 2 k R s s 2 + ω 0 2 - - - ( 1 )
For (1) formula, in fundamental frequency omega 0the amplitude-frequency characteristic at place is:
| G ( ω 0 ) | = k p 2 + ( 2 k R ω 0 - ω 0 2 + ω 0 2 ) 2 - - - ( 2 )
Yi Zhi, (2) formula is tending towards infinitely great, can realize fundamental frequency omega 0the astatic control of input signal.
In MMC, circulation is 2 times of fundamental frequency character, then resonance angular frequency ω in controller 0be 200 π (respective frequencies is 100Hz).Its integration item transfer function Bode diagram as shown in Figure 5.Can find out that in 100hz place open-loop gain be infinity, the DAZ gene of offset of sinusoidal signal can be realized.
(1) Digital Implementation of formula can in the following ways:
First adopt bilinear transformation, carry out the discretization of continuous domain.Transformation for mula is:
G ( s ) = > G ( z ) s = 2 T × 1 - z - 1 1 + z - 1 - - - ( 3 )
Formula (3) is substituted into (1) Shi Ke get:
G ( z ) = k p + T k R ( - z - 2 + 1 ) ( ω 0 2 4 + 1 ) z - 2 + ( ω 0 2 2 - 2 ) z - 1 + ω 0 2 4 + 1 - - - ( 4 )
Every phase all comprises a PR controller.As shown in Figure 6, respectively the instantaneous value of six bridge arm current is sampled, ask for the mean value (theoretical value is 1/3 of direct current Idc) of these 6 bridge arm current instantaneous values, using the set-point of this mean value as brachium pontis circulation; Ask for the mean value (theoretical value is 1/3 of brachium pontis circulation+direct current Idc) of the upper and lower bridge arm electric current of the corresponding phase of PR controller, using the value of feedback of this mean value as brachium pontis circulation.
The error amount of set-point and value of feedback is through the process of PR controller, and the output valve of PR controller is as the offset u of place phase bridge arm voltage diffj_ref, to realize the direct control of brachium pontis circulation.
This control method only need gather converter 6 bridge arm current instantaneous values and participate in controlling.Without the need to obtaining the phase information of three-phase alternating voltage, decreasing the complexity of controller, saving sensor hardware resource simultaneously, computing is simple, without trigonometric function and coordinate transform, enormously simplify the complexity of Digital Implementation.
Shown in Fig. 7, during for controlling based on PR under mains frequency fluctuation, brachium pontis circulation steady-state behaviour.Before 0.5s, mains frequency is normal, and the control precision of its circulation meets the demands.In the 0.5s moment, mains frequency fluctuates, and between 48Hz to 52Hz, according to 4Hz/0.1s fluctuation (in Practical Project, the amplitude of variation of mains frequency and speed are far below this, only carry out principle emulation herein), other Parameter Conditions are constant.When mains frequency fluctuates (departing from power frequency 50Hz), within brachium pontis circulation peak value can be controlled in 1A.Control (circulation peak value 3A) compared to the PI shown in Fig. 2, circulation precision improves, and meets control precision requirement, and does not change with the fluctuation of mains frequency, has good anti-mains frequency disturbance performance.And the converter stability of a system is not affected.
As shown in Figure 8, for affecting the dynamic property that circulation controls when mains frequency fluctuates.During 0.3s, converter perception is idle by 35MVar step to 80MVar, and electrical network, between 48Hz to 52Hz, fluctuates according to 4Hz/0.1s, other parameter constants.The maximum dynamic current peak value of Fig. 8 bridge arm circulation is 1A, almost non-overshoot, and the response time is within half circulation cycle.Its dynamic property is obviously better than the circulation of PI shown in Fig. 3 and controls, and whole process bridge arm current almost non-overshoot, the response time is in half power frequency cycle.Do not affect converter stability, the dynamic property of bridge arm current is good, completely not by the impact of electrical network frequency fluctuation.
Be presented above concrete execution mode, but the present invention is not limited to described execution mode.Basic ideas of the present invention are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out execution mode without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.

Claims (2)

1. a multi-level inverter bridge arm circular current control method, it is characterized in that, for arbitrary phase brachium pontis, gather the instantaneous value of all bridge arm current, using the set-point that the mean value of the instantaneous value of described all bridge arm current controls as PR, the mean value of the current instantaneous value of the upper and lower bridge arm of corresponding phase is as value of feedback, and the error amount of set-point and value of feedback inputs PR controller, output valve after process, as the offset of corresponding phase bridge arm voltage, realizes the control to corresponding brachium pontis circulation.
2. multi-level inverter bridge arm circular current control method according to claim 1, is characterized in that, the transfer function model of described PR controller is
CN201410556820.9A 2014-10-20 2014-10-20 Modular multi-level converter bridge arm circulation control method Pending CN104319801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410556820.9A CN104319801A (en) 2014-10-20 2014-10-20 Modular multi-level converter bridge arm circulation control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410556820.9A CN104319801A (en) 2014-10-20 2014-10-20 Modular multi-level converter bridge arm circulation control method

Publications (1)

Publication Number Publication Date
CN104319801A true CN104319801A (en) 2015-01-28

Family

ID=52375000

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410556820.9A Pending CN104319801A (en) 2014-10-20 2014-10-20 Modular multi-level converter bridge arm circulation control method

Country Status (1)

Country Link
CN (1) CN104319801A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106505612A (en) * 2016-11-04 2017-03-15 上海电力学院 High-power permanent magnet synchronous wind generating grid-connected system control method based on MMC
CN107332257A (en) * 2017-08-24 2017-11-07 上海交通大学 A kind of STATCOM and its control method
CN107408819A (en) * 2015-03-19 2017-11-28 通用电器技术有限公司 Electric power transmission network
CN107634534A (en) * 2017-09-27 2018-01-26 南方电网科学研究院有限责任公司 Flexible direct-current transmission converter major loop electric parameter acquisition methods and device
CN108494298A (en) * 2018-03-21 2018-09-04 广东电网有限责任公司电力科学研究院 A kind of the voltage and current inner ring control emulation mode and system of virtual synchronous machine
CN109149612A (en) * 2017-06-15 2019-01-04 许继集团有限公司 Process Neutron module pressure equalizing control method is moved back in a kind of converter station and its throwing of single valve group
CN110504853A (en) * 2018-05-18 2019-11-26 南京理工大学 Improvement circular current control method based on flexible DC transmission
CN114204584B (en) * 2021-11-25 2024-04-26 广东电网有限责任公司 Calculation method and device for internal circulation of modularized multi-level converter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103337980A (en) * 2013-05-30 2013-10-02 哈尔滨工业大学 Modular multilevel converter (MMC) circulating current suppression method
CN103346554A (en) * 2013-06-19 2013-10-09 国家电网公司 Circulation inhibition method applied to flexible direct current power transmission system
CN103595285A (en) * 2013-11-29 2014-02-19 哈尔滨工业大学 Method and device for controlling energy balance between bridge arms of modularized multi-level converter
CN103904689A (en) * 2014-04-16 2014-07-02 左浩俊 Frequency-converting control method for photovoltaic converter
CN103956926A (en) * 2014-05-15 2014-07-30 山东大学 Low-frequency operation integrated control system and method of modularization multi-level converters
CN103986357A (en) * 2013-02-13 2014-08-13 韩国电气研究院 Method for suppressing circulating current in modular multilevel converter for high voltage direct-current transmission

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103986357A (en) * 2013-02-13 2014-08-13 韩国电气研究院 Method for suppressing circulating current in modular multilevel converter for high voltage direct-current transmission
CN103337980A (en) * 2013-05-30 2013-10-02 哈尔滨工业大学 Modular multilevel converter (MMC) circulating current suppression method
CN103346554A (en) * 2013-06-19 2013-10-09 国家电网公司 Circulation inhibition method applied to flexible direct current power transmission system
CN103595285A (en) * 2013-11-29 2014-02-19 哈尔滨工业大学 Method and device for controlling energy balance between bridge arms of modularized multi-level converter
CN103904689A (en) * 2014-04-16 2014-07-02 左浩俊 Frequency-converting control method for photovoltaic converter
CN103956926A (en) * 2014-05-15 2014-07-30 山东大学 Low-frequency operation integrated control system and method of modularization multi-level converters

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107408819A (en) * 2015-03-19 2017-11-28 通用电器技术有限公司 Electric power transmission network
CN107408819B (en) * 2015-03-19 2021-03-09 通用电器技术有限公司 Power transmission network
CN106505612A (en) * 2016-11-04 2017-03-15 上海电力学院 High-power permanent magnet synchronous wind generating grid-connected system control method based on MMC
CN106505612B (en) * 2016-11-04 2019-06-11 上海电力学院 High-power permanent magnet synchronous wind generating grid-connected system control method based on MMC
CN109149612A (en) * 2017-06-15 2019-01-04 许继集团有限公司 Process Neutron module pressure equalizing control method is moved back in a kind of converter station and its throwing of single valve group
CN107332257A (en) * 2017-08-24 2017-11-07 上海交通大学 A kind of STATCOM and its control method
CN107634534A (en) * 2017-09-27 2018-01-26 南方电网科学研究院有限责任公司 Flexible direct-current transmission converter major loop electric parameter acquisition methods and device
CN107634534B (en) * 2017-09-27 2020-02-18 南方电网科学研究院有限责任公司 Method for acquiring electrical parameters of main loop of flexible direct current transmission converter
CN108494298A (en) * 2018-03-21 2018-09-04 广东电网有限责任公司电力科学研究院 A kind of the voltage and current inner ring control emulation mode and system of virtual synchronous machine
CN108494298B (en) * 2018-03-21 2020-11-03 广东电网有限责任公司电力科学研究院 Voltage and current inner loop control simulation method and system of virtual synchronous machine
CN110504853A (en) * 2018-05-18 2019-11-26 南京理工大学 Improvement circular current control method based on flexible DC transmission
CN114204584B (en) * 2021-11-25 2024-04-26 广东电网有限责任公司 Calculation method and device for internal circulation of modularized multi-level converter

Similar Documents

Publication Publication Date Title
CN104319801A (en) Modular multi-level converter bridge arm circulation control method
CN103475029B (en) Three-phase LCL type grid-connected inverter control system and method based on pole assignment
CN106712099B (en) A kind of multi-parallel Design of grid-connected photovoltaic inverter method
Qi et al. Two-dimensional impedance-shaping control with enhanced harmonic power sharing for inverter-based microgrids
CN104218590A (en) Unbalance voltage compensation and control method based on virtual synchronous machine
CN104953606A (en) Networked layered compensation method for voltage unbalance of PCC (Point of Common Coupling) of islanded microgrid
CN102842921A (en) Micro-grid multi-inverter parallel voltage control method for droop control of robust power
CN109792219A (en) A kind of 3-phase power converter and its control method
CN110137971B (en) Voltage stability control method for three-phase alternating current power spring
CN112217225B (en) Self-adaptive virtual resistance-capacitance control method for direct-current micro-grid
CN102723740A (en) Stable MPPT (Maximum Power Point Tracking) control system and method of single-stage photovoltaic inverter
CN104242717A (en) Self-adaption output impedance control method based on virtual synchronous machine
CN103972922A (en) Photovoltaic grid connection control method on basis of improved quasi-resonance control and repeated control
CN105553309A (en) T-type three-level inverter and midpoint balance control method thereof
CN108039718A (en) A kind of improved flexible direct current voltage control method and system
CN103595280A (en) Deadbeat control method of solar power generating system inverter under condition of voltage unbalance
CN107332244A (en) The level SAPF of three-phase four-wire system NPC types three nonlinear control method
CN110429603B (en) Six-switch seven-level active power filter and compensation method
CN104065292A (en) Three-level converter neutral point potential balancing control method and device
CN110048447B (en) H between flexible direct current transmission system station ∞ Decoupling controller
CN112909919A (en) Neutral point potential balancing method and system for two-stage three-level three-phase four-wire system energy storage converter
CN104917190A (en) Decentralized control method for H-bridge cascaded power grid static reactive power compensator
CN112448407A (en) Impedance optimization control strategy for improving stability of grid-connected system under constant power control under bidirectional power flow
CN112532094A (en) Compound control method of T-type three-level NPC inverter
CN104795836B (en) A kind of single-phase photovoltaic grid-connected generating detecting system and its non-linear current control method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20150128

RJ01 Rejection of invention patent application after publication