CN106849185A - A kind of automated power distribution method of DC/AC converters - Google Patents
A kind of automated power distribution method of DC/AC converters Download PDFInfo
- Publication number
- CN106849185A CN106849185A CN201510891174.6A CN201510891174A CN106849185A CN 106849185 A CN106849185 A CN 106849185A CN 201510891174 A CN201510891174 A CN 201510891174A CN 106849185 A CN106849185 A CN 106849185A
- Authority
- CN
- China
- Prior art keywords
- converters
- voltage
- loop
- control structure
- outer shroud
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention provides a kind of automated power distribution method of DC/AC converters, simplifies the control structure of DC/AC converters；According to the control structure of the DC/AC converters after simplification, closed loop transfer function, is obtained；According to closed loop transfer function, adjusted coefficient；Adjustment factor is set；Regulation DC voltage outer shroud control response；Realize the automated power distribution of DC/AC converters.Method proposed by the present invention realizes that simple and design procedure is simple, and improvement strategy is based on conventional voltage outer shroud, current inner loop control strategy and launches, and is adjusted merely by the existing parameter of DC/AC converters and realizes objective function, with stronger feasibility.Secondly, distributed power supply management system parallel connection DC/AC converters can be automatically obtained satisfaction and put into successively and excision according to system operation virtual condition, multi-parallel DC/AC converters non-full load operating mode simultaneously is avoided, distributed power supply system overall operation efficiency is improve.
Description
Technical field
The present invention relates to distributed power source control field, and in particular to a kind of automated power distribution side of DC/AC converters
Method.
Background technology
The new electric network that distributed power supply system is made up of distributed power source, load, energy-storage system and control device etc.
Topological system, with various topological structures.With in distributed power supply system, DC load is continuously increased, and photovoltaic,
The devices such as energy-storage system are also in itself direct current output, and alternating current-direct current mixed distribution formula power-supply system turns into distributed power supply system
Development trend.DC/AC converters are used as dc bus and ac bus in connection alternating current-direct current mixed distribution formula power-supply system
Converting means play an important role, as distributed power supply system scale constantly expands, DC/AC converters need
The demand of alternating current-direct current mixed distribution formula power-supply system operation is met in the way of parallel running.
In current alternating current-direct current mixed distribution formula power-supply system parallel connection DC/AC converters by the way of signal is interconnected by upper
The mode of machine or wherein one main DC/AC convertor controls is run.According to each distributed power source in dc bus side and load
Power actual condition, selects the DC/AC converters operation of fair amount, and other DC/AC converters are out of service, real
Existing system effectiveness is optimal.The method of this use host computer centralized Control and main DC/AC converters master ＆ slave control is based on logical
Letter signal interconnection launches, and when communication line has compared with long time delay or breaks down, system will be unable to normal operation.
The content of the invention
In view of this, a kind of automated power distribution method of DC/AC converters that the present invention is provided, the method realizes letter
List and design procedure are simple, and this method improvement strategy is based on conventional voltage outer shroud, current inner loop control strategy and launches, only
It is to be capable of achieving objective function by adjusting the existing parameter of DC/AC converters, with stronger feasibility.Secondly, adopt
Can be automatically real according to system operation virtual condition with the distributed power supply management system parallel connection DC/AC converters of this method
Now meet and put into successively and cut off, it is to avoid multi-parallel DC/AC converters non-full load operating mode simultaneously, improve point
Cloth power-supply system overall operation efficiency.
The purpose of the present invention is achieved through the following technical solutions：
A kind of automated power distribution method of DC/AC converters, methods described is used in mixed distribution formula power-supply system
DC/AC converters carry out automated power distribution；The DC/AC converters it is in parallel successively and be all connected with ac bus with it is straight
Stream bus；The DC/AC converters are double -loop control structure；The double -loop control structure include DC voltage outer shroud and
Grid-connected current inner ring；Methods described comprises the following steps：
Step 1. simplifies the control structure of the DC/AC converters；
Step 2. according to simplification after the DC/AC converters control structure, obtain closed loop transfer function,；
Step 3. sets the adjustment factor in the closed loop transfer function,；
Step 4. adjusts DC voltage outer shroud control response；Realize the automated power distribution of the DC/AC converters.
Preferably, the step 1 includes：
Grid-connected current inner ring and the governing speed relation of DC voltage outer shroud according to the DC/AC converters, simplify institute
State the control structure of DC/AC converters；I.e. in the DC voltage outer shroud governing speed, the grid-connected current inner ring
Send in real time without the instruction of difference follow current.
Preferably, the step 2 includes：
The control structure of the DC/AC converters after according to simplification, obtains closed loop transfer function, G (s)：
Wherein, Tv=kpv/kivAnd TvIt is DC voltage PI governing loop integration time constants；kpvFor DC/AC is converted
Device Voltage loop proportionality coefficient；K is the input of DC/AC converters, output current peak ratio coefficient；TSFor DC/AC becomes
Parallel operation DC voltage sampling filter time constant；S is differential operator；C is DC/AC converter intermediate dcs side electricity
Capacitance.
Preferably, the step 3 includes：
Determine the Voltage loop proportionality coefficient k in closed loop transfer function, G (s)pvTo influence the DC voltage outer shroud regulation
The adjustment factor of speed；And by the Voltage loop proportionality coefficient k of the whole DC/AC converters in parallelpvIt is set to
Different value.
Preferably, the Voltage loop proportionality coefficient k in the step 3pvValue set it is bigger, the DC/AC becomes
The Voltage loop gain of parallel operation is higher, bandwidth is wider and dynamic response is faster；
The Voltage loop proportionality coefficient kpvValue set it is smaller, the Voltage loop gain of the DC/AC converters is lower,
Bandwidth is narrower and dynamic response is slower.
Preferably, the step 4 includes：
4-1. when dc bus side power changes so that DC bus-bar voltage is disturbed, the response of first occurrence dynamics
The DC/AC converters DC voltage regulation link reaches saturation at first, obtains output current instruction；
4-2. is instructed according to the output current, the DC/AC converters full-load run of the first occurrence dynamics response of control；
Whole DC/AC converters 4-3. in parallel are opened according to DC voltage regulation ring dynamic response is descending successively
Full-load run is moved and reached, until the input for a DC/AC converter occur causes that system power is balanced, is stopped
Continue to start；
4-4. sets last the described DC/AC converters stable DC bus bar side voltage fortune in starting state
OK, the automated power distribution of the DC/AC converters is realized.
It can be seen from above-mentioned technical scheme that, the invention provides a kind of automated power distribution method of DC/AC converters,
Simplify the control structure of DC/AC converters；According to the control structure of the DC/AC converters after simplification, closed loop biography is obtained
Delivery function；According to closed loop transfer function, adjusted coefficient；Adjustment factor is set；The outer shroud control of regulation DC voltage rings
Should；Realize the automated power distribution of DC/AC converters.Method proposed by the present invention realizes that simple and design procedure is simple,
And improvement strategy is based on conventional voltage outer shroud, current inner loop control strategy and launches, and has been adjusted merely by DC/AC converters both
There is parameter to realize objective function, with stronger feasibility.Secondly, distributed power supply management system parallel connection DC/AC
Converter can be automatically obtained satisfaction and put into successively and cut off according to system operation virtual condition, it is to avoid multi-parallel
DC/AC converters are while non-full load operating mode, improves distributed power supply system overall operation efficiency.
With immediate prior art ratio, the present invention provide technical scheme there is following excellent effect：
1st, in technical scheme provided by the present invention, this method realizes that simple and design procedure is simple, and this method is improved
Strategy is launched based on conventional voltage outer shroud, current inner loop control strategy, is only through adjusting the existing ginseng of DC/AC converters
Number is capable of achieving objective function, with stronger feasibility.
2nd, technical scheme provided by the present invention, is converted using the distributed power supply management system parallel connection DC/AC of this method
Device can be automatically obtained satisfaction and put into successively and cut off according to system operation virtual condition, it is to avoid multi-parallel DC/AC becomes
Parallel operation is while non-full load operating mode, improves distributed power supply system overall operation efficiency.
3rd, the technical scheme that the present invention is provided, is widely used, with significant Social benefit and economic benefit.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the automated power distribution method of DC/AC converters of the invention；
Fig. 2 is the schematic flow sheet of step 5 in distribution method of the invention；
Fig. 3 is the structural representation of distributed power supply system；
Fig. 4 is DC/AC control principle block diagrams in parallel；
Fig. 5 is the parallel connection in a kind of concrete application example of the automated power distribution method of DC/AC converters of the invention
DC/AC control principle simplified block diagrams.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base
In embodiments of the invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, the present invention provides a kind of automated power distribution method of DC/AC converters, method is used for mixed
The DC/AC converters closed in distributed power supply system carry out automated power distribution；DC/AC converters are in parallel and equal successively
Connection ac bus and dc bus；DC/AC converters are double -loop control structure；Double -loop control structure includes direct current
Pressure outer shroud and grid-connected current inner ring；Comprise the following steps：
Step 1. simplifies the control structure of DC/AC converters；
Step 2. obtains closed loop transfer function, according to the control structure of the DC/AC converters after simplification；
Step 3. sets the adjustment factor in closed loop transfer function,；
Step 4. adjusts DC voltage outer shroud control response；Realize the automated power distribution of DC/AC converters.
Wherein, step 1 includes：
Grid-connected current inner ring and the governing speed relation of DC voltage outer shroud according to DC/AC converters, simplify DC/AC
The control structure of converter；I.e. in DC voltage outer shroud governing speed, grid-connected current inner ring sends without difference tracking in real time
Current-order.
Wherein, step 2 includes：
According to the control structure of the DC/AC converters after simplification, closed loop transfer function, G (s) is obtained：
Wherein, Tv=kpv/kivAnd TvIt is DC voltage PI governing loop integration time constants；kpvFor DC/AC is converted
Device Voltage loop proportionality coefficient；K is the input of DC/AC converters, output current peak ratio coefficient；TSFor DC/AC becomes
Parallel operation DC voltage sampling filter time constant；S is differential operator；C is DC/AC converter intermediate dcs side electricity
Capacitance.
Wherein, step 3 includes：
Determine the Voltage loop proportionality coefficient k in closed loop transfer function, G (s)pvTo influence the tune of DC voltage outer shroud governing speed
Section coefficient；And by the Voltage loop proportionality coefficient k of whole DC/AC converters in parallelpvIt is set to different value；
Wherein, kpvThe Voltage loop gain of the bigger DC/AC converters of value is higher, bandwidth is wider and dynamic response is faster；
kpvThe Voltage loop gain of the smaller DC/AC converters of value is lower, bandwidth is narrower and dynamic response is slower.
As shown in Fig. 2 step 5 includes：
5-1. when dc bus side power changes so that DC bus-bar voltage is disturbed, the response of first occurrence dynamics
DC/AC converter DC voltage regulation links reach saturation at first, obtain output current instruction；
5-2. is instructed according to output current, the DC/AC converter full-load runs of the first occurrence dynamics response of control；
Whole DC/AC converters 5-3. in parallel start simultaneously according to DC voltage regulation ring dynamic response is descending successively
Full-load run is reached, until the input for a DC/AC converter occur causes that system power is balanced, stops continuing to start；
5-4. sets last the DC/AC converter stable DC bus bar sides voltage operation in starting state, real
The automated power distribution of existing DC/AC converters.
The present invention provides a kind of concrete application example of distributed power supply system dual mode operated control method of energy accumulation current converter,
It is as follows：
Alternating current-direct current mixed distribution formula power-supply system parallel connection DC/AC converter automated power allocation strategy bases as shown in Figure 3
Launch in traditional DC/AC converter topologies structure；In Fig. 3, DC/AC1, DC/AC2, DC/AC3 are handed over for connection
3 parallel connection DC/AC converters of stream bus and dc bus.
As shown in figure 4, using DC voltage outer shroud and grid-connected current inner ring control structure, two-layer governing loop uses PI
Regulative mode, DC voltage outer shroud is used for stable DC bus bar side voltage and determines that the switching of parallel connection DC/AC converters is suitable
Sequence, grid-connected current inner ring realizes that electric current is exported according to the result that DC voltage outer shroud is adjusted；
Wherein, Vdc_ref is DC side setting value in Fig. 4；Vdc is DC voltage actual value.I is converted for DC/AC
Device output current actual value；Kpv is DC/AC converter voltage ring proportionality coefficients；Kiv is DC/AC converter voltages
Ring integral coefficient；Kpi is DC/AC converter current ring proportionality coefficients；Kii is DC/AC converter current ring integration systems
Number；L is DC/AC converter output filters；K is the input of DC/AC converters, output current peak ratio coefficient；
C is DC/AC converter intermediate dc lateral capacitance capacitances；When Ts is DC/AC converter DC voltage sampling filters
Between constant；
Because DC/AC converter control systems are in design, current inner loop governing speed is far longer than DC voltage outer shroud
Governing speed, be assume that when outer voltage governing speed is discussed herein electric current loop can no error following current-order in real time,
Therefore parallel connection DC/AC control block diagrams shown in simplification figure 4 obtain Fig. 5.
The closed loop transfer function, that can obtain DC voltage regulation by Fig. 5 is：
T in formulav=kpv/kiv, Tv is DC voltage PI governing loop integration time constants.
From DC voltage regulation link closed loop transfer function, the main modulated link ratio of DC voltage outer shroud governing speed
Example coefficient k pv determines that the Voltage loop proportionality coefficient kpv of DC/AC converters is bigger, and Voltage loop gain is higher, bandwidth
Wider, dynamic response is faster.
When dc bus side, power changes, when DC bus-bar voltage is disturbed, the most fast DC/AC of dynamic response
Converter DC voltage regulation link reaches saturation at first, and output current instruction Ipeak, control DC/AC converter is fully loaded with
Operation.
DC/AC converters in parallel can successively start and reach full according to DC voltage regulation ring dynamic response is descending
Carrying row, until the input of a DC/AC converter causes that system power is balanced, the DC/AC converters for finally putting into
Non-full load, possesses voltage regulation capability, is transported by the DC/AC converter stable DC bus bar sides voltage for finally putting into
OK.
The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, although with reference to above-described embodiment to this
Invention has been described in detail, and those of ordinary skill in the art can still enter to specific embodiment of the invention
Row modification or equivalent, and these are without departing from any modification of spirit and scope of the invention or equivalent, its is equal
Applying within pending claims of the invention.
Claims (6)
1. a kind of automated power distribution method of DC/AC converters, methods described is used for mixed distribution formula power-supply system
In DC/AC converters carry out automated power distribution；The DC/AC converters are in parallel successively and are all connected with ac bus
With dc bus；The DC/AC converters are double -loop control structure；The double -loop control structure is included outside DC voltage
Ring and grid-connected current inner ring；Characterized in that, methods described comprises the following steps：
Step 1. simplifies the control structure of the DC/AC converters；
Step 2. according to simplification after the DC/AC converters control structure, obtain closed loop transfer function,；
Step 3. sets the adjustment factor in the closed loop transfer function,；
Step 4. adjusts DC voltage outer shroud control response；Realize the automated power distribution of the DC/AC converters.
2. the method for claim 1, it is characterised in that the step 1 includes：
Grid-connected current inner ring and the governing speed relation of DC voltage outer shroud according to the DC/AC converters, simplify institute
State the control structure of DC/AC converters；I.e. in the DC voltage outer shroud governing speed, the grid-connected current inner ring
Send in real time without the instruction of difference follow current.
3. the method for claim 1, it is characterised in that the step 2 includes：
The control structure of the DC/AC converters after according to simplification, obtains closed loop transfer function, G (s)：
Wherein, Tv=kpv/kivAnd TvIt is DC voltage PI governing loop integration time constants；kpvFor DC/AC is converted
Device Voltage loop proportionality coefficient；K is the input of DC/AC converters, output current peak ratio coefficient；TSFor DC/AC becomes
Parallel operation DC voltage sampling filter time constant；S is differential operator；C is DC/AC converter intermediate dcs side electricity
Capacitance.
4. method as claimed in claim 3, it is characterised in that the step 3 includes：
Determine the Voltage loop proportionality coefficient k in closed loop transfer function, G (s)pvTo influence the DC voltage outer shroud regulation
The adjustment factor of speed；And by the Voltage loop proportionality coefficient k of the whole DC/AC converters in parallelpvIt is set to
Different value.
5. method as claimed in claim 4, it is characterised in that the Voltage loop proportionality coefficient k in the step 3pv
Value set it is bigger, the Voltage loop gain of the DC/AC converters is higher, bandwidth is wider and dynamic response is faster；
The Voltage loop proportionality coefficient kpvValue set it is smaller, the Voltage loop gain of the DC/AC converters is lower,
Bandwidth is narrower and dynamic response is slower.
6. the method for claim 1, it is characterised in that the step 4 includes：
4-1. when dc bus side power changes so that DC bus-bar voltage is disturbed, the response of first occurrence dynamics
The DC/AC converters DC voltage regulation link reaches saturation at first, obtains output current instruction；
4-2. is instructed according to the output current, the DC/AC converters full-load run of the first occurrence dynamics response of control；
Whole DC/AC converters 4-3. in parallel are opened according to DC voltage regulation ring dynamic response is descending successively
Full-load run is moved and reached, until the input for a DC/AC converter occur causes that system power is balanced, is stopped
Continue to start；
4-4. sets last the described DC/AC converters stable DC bus bar side voltage fortune in starting state
OK, the automated power distribution of the DC/AC converters is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891174.6A CN106849185A (en) | 2015-12-07 | 2015-12-07 | A kind of automated power distribution method of DC/AC converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891174.6A CN106849185A (en) | 2015-12-07 | 2015-12-07 | A kind of automated power distribution method of DC/AC converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106849185A true CN106849185A (en) | 2017-06-13 |
Family
ID=59150686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510891174.6A Pending CN106849185A (en) | 2015-12-07 | 2015-12-07 | A kind of automated power distribution method of DC/AC converters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106849185A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113110242A (en) * | 2021-05-14 | 2021-07-13 | 中国核动力研究设计院 | High-efficiency analog quantity signal output device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702523A (en) * | 2009-11-20 | 2010-05-05 | 南京航空航天大学 | Distributed modular grid-connected power generation system and control method thereof |
| JP2015070654A (en) * | 2013-09-27 | 2015-04-13 | 株式会社ダイヘン | Control circuit for controlling inverter circuit, inverter device comprising the control circuit, power system comprising the inverter device, and control method |
-
2015
- 2015-12-07 CN CN201510891174.6A patent/CN106849185A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702523A (en) * | 2009-11-20 | 2010-05-05 | 南京航空航天大学 | Distributed modular grid-connected power generation system and control method thereof |
| JP2015070654A (en) * | 2013-09-27 | 2015-04-13 | 株式会社ダイヘン | Control circuit for controlling inverter circuit, inverter device comprising the control circuit, power system comprising the inverter device, and control method |
Non-Patent Citations (4)
| Title |
|---|
| 张犁，孙凯，冯兰兰，吴田进，刑岩，葛红娟: "一种模块化光伏发电并网系统", 《中国电机工程学报》 * |
| 张犁，胡海兵，冯兰兰，吴田进，刑岩: "模块化光伏并网系统欧洲效率优化控制方法", 《中国电机工程学报》 * |
| 张犁: "模块化非隔离光伏并网逆变器及发电系统研究", 《中国博士学位论文全文数据库 工程科技II辑》 * |
| 朱承邦，李乐，王晓鹏: "基于SPWM控制的电压、电流双环逆变器建模及其仿真", 《中国舰船研究》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113110242A (en) * | 2021-05-14 | 2021-07-13 | 中国核动力研究设计院 | High-efficiency analog quantity signal output device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107800155B (en) | Active power distribution network multi-period island operation method considering intelligent soft switch | |
| CN105119280B (en) | Alternating current-direct current mixed structure active power distribution network running optimizatin method based on cone optimization | |
| CN103647302B (en) | Double-layer coordinating and controlling method of multi-sub microgrid-contained mixed microgrid system | |
| CN107240934B (en) | AC/DC hybrid micro-grid multi-mode operation coordination control method and smooth switching method | |
| CN108767864B (en) | Power distribution network voltage fluctuation out-of-limit inhibition method based on flexible multi-state switch | |
| CN104269891B (en) | Power control method and system for extra-high-voltage direct current layering access mode | |
| CN105305402A (en) | Robust autonomous control method for bus voltage of DC micro grid | |
| CN108988402A (en) | Alternating current-direct current power distribution network optimal control method based on Optimized Operation | |
| CN106786694A (en) | A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating | |
| CN107910869B (en) | A kind of distribution static series compensator control system and its control method | |
| CN107017660A (en) | The grid-connected protection system in photovoltaic power station region and grid-connected control method | |
| CN102780227A (en) | Chained static compensator (STATCOM) direct-current-side voltage controlling method and controlling circuit based on voltage-sharing capacitor | |
| CN107404119A (en) | A kind of electric automobile load turns the control method for system | |
| CN102386623A (en) | Method for reducing loss of wind farm | |
| CN109687481A (en) | Photovoltaic plant based on principal and subordinate's coordinated control participates in primary frequency modulation implementation method | |
| CN106786482A (en) | The droop control method of direct-current micro-grid | |
| CN108695840A (en) | A kind of DC distribution net voltage control method and system | |
| CN104218840A (en) | Micro-grid energy storage topological inverter and method for operating same | |
| CN107994618A (en) | The active power dispatching method and power distribution network measuring and controlling equipment of power distribution network level light accumulation | |
| CN109687537B (en) | No-difference optimization control method for communication-free alternating current-direct current hybrid micro-grid | |
| CN104009482B (en) | Method for dynamically setting gateway reactive power control range under single-line and single-variable wiring mode | |
| CN103904674B (en) | A kind of direct current transportation sending end islanded system tidal current analysis method | |
| CN106849185A (en) | A kind of automated power distribution method of DC/AC converters | |
| CN104037785A (en) | Dynamic reactive power compensation device and method applied to photovoltaic system | |
| CN103956728B (en) | Double-circuit power control method for common-tower double-circuit direct current transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170613 |