CN104348180B - Distributed power supply grid-connected point and access mode selection method - Google Patents

Distributed power supply grid-connected point and access mode selection method Download PDF

Info

Publication number
CN104348180B
CN104348180B CN201310310252.XA CN201310310252A CN104348180B CN 104348180 B CN104348180 B CN 104348180B CN 201310310252 A CN201310310252 A CN 201310310252A CN 104348180 B CN104348180 B CN 104348180B
Authority
CN
China
Prior art keywords
distributed power
power supply
voltage
grid
main transformer
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.)
Active
Application number
CN201310310252.XA
Other languages
Chinese (zh)
Other versions
CN104348180A (en
Inventor
刘聪
张军
黎鹏
李芳�
于士斌
刘嘉超
迟福建
徐科
韩平
崔健
李桂鑫
张玉侠
刘源
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.)
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Tianjin Electric Power 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 State Grid Corp of China SGCC, State Grid Tianjin Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201310310252.XA priority Critical patent/CN104348180B/en
Publication of CN104348180A publication Critical patent/CN104348180A/en
Application granted granted Critical
Publication of CN104348180B publication Critical patent/CN104348180B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H02J3/382—
    • H02J3/383—
    • H02J3/386—
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a distributed power supply grid-connected point and access mode selection method. The method includes the steps of: 1) determining power generation characteristics of distributed power supplies which need grid connection; 2) knowing the situation of a power grid of an area where the distributed power supplies are located, making statistics of capacity and load of a single main transformer of a public transformer substation of each voltage class, and calculating a weighted average of capacity of the main transformer of each voltage class; 3) preliminarily selecting a voltage class of grid connection according to power generation capacity of the distributed power supplies; 4) determining an access mode of the distributed power supplies; and 5) determining an access point of the distributed power supplies. By adoption of the distributed power supply grid-connected point and access mode selection method provided by the invention, influence of access on safe and stable operation of the power grid can be reduced to the greatest extent on the premise of ensuring effective access of the distributed power supplies to the power grid.

Description

Distributed power supply grid-connected point and access mode selection method
Technical Field
The invention relates to the field of power supply, in particular to a distributed power supply grid-connected point and an access mode selection method.
Background
With the rapid development of wind power generation, photovoltaic power generation, biomass power generation and other various energy-saving and environment-friendly power supplies, the power generation proportion of the power supply is increased year by year. Wind power generation, photovoltaic power generation, biomass power generation and other various new energy power generation have smaller general capacities, and are merged into a low-voltage-level power grid in a distributed power supply mode. Different from the traditional large-capacity power supply and the direct integration of the power supply into a high-voltage grade power grid, the distributed power supply has various forms, and various types of power supplies have the characteristics of self operation; and the distributed power supply is close to the user side, so that the radial power supply structure of the traditional power system is changed, and the safe and stable operation, the electric energy quality, the active/reactive control, the protection, the communication and the like of the power distribution network are influenced.
The influence brings brand-new challenges to power grids, especially power distribution network operation enterprises, and how to reduce the influence of the access of the distributed power supply on the safe and stable operation of the power grid to the maximum extent on the premise of ensuring the effective access of the distributed power supply to the power grid is a difficult point to be solved urgently in the actual engineering at present.
Disclosure of Invention
The invention aims to provide a distributed power supply grid-connected point and an access mode selection method, which can aim at the characteristics of distributed power supply power generation, combine with a grid structure of a city distribution network and comprehensively consider the influence factors of a power grid in the area where the distributed power supply is accessed.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a distributed power supply grid-connected point and access mode selection method comprises the following steps:
1) determining the power generation characteristics of a distributed power supply needing grid connection;
2) the method comprises the steps of knowing the power grid condition of a region where a distributed power supply is located, counting the capacity and load of a single main transformer of each voltage level public substation, and calculating the weighted average value of the capacities of the main transformers of each voltage level;
3) preliminarily selecting a grid-connected voltage grade according to the power generation capacity of the distributed power supply;
4) determining an access mode of a distributed power supply;
5) an access point for the distributed power source is determined.
Preferably, the distributed power supply in step 1) includes a synchronous motor, an asynchronous motor and an inverter type distributed power supply.
Preferably, the calculation formula for calculating the weighted average value of the main transformer capacity of each voltage class in the step 2) is as follows,
wherein,
-the weighted average of the main transformer capacity with voltage of "i" kV accessible in the area where the distributed power supply is located;
the i-voltage grade can be 380V, 10kV, 35kV and the like generally;
ni-the number of main transformers with voltage of i kV in the area where the distributed power supply is located;
Tij-the area where the distributed power supply is located has the capacity of the jth main transformer with a voltage of "i" kV class;
Lij-the load factor of the jth main transformer with a voltage of "i" kV class in the area where the distributed power supply is located;
the L-constant is a threshold value of the load rate of the main transformer and can be selected according to the condition of the power grid;
if((Lij－L)>0) -judging the weight, which is (L)ij－L)>The value of 0 is 1, otherwise the value is 0.
Preferably, the formula of the grid-connected voltage class selected in step 3) is as follows,
wherein,
in the above formula, the first and second carbon atoms are,
-the voltage in the area of the distributed power supply is a weighted average of the main transformer capacity of "i" kV;
the i-voltage grade can be 380V, 10kV, 35kV and the like generally;
NT-a constant greater than 1;
CDER-installed capacity of the distributed power supply;
a value of whenThe value is 1, otherwise, the value is 0;
VDERithe initial selection zone bit of the distributed power supply access voltage class, when the value of the zone bit is 1, indicates that the zone bit can be incorporated into a power grid with the voltage of i kV, and generally two voltage classes are adopted.
Preferably, the determination formula of the access mode of the distributed power source in step 4) is,
wherein,
CL-grid connection lineThe transmission capacity of (a);
Nl-a constant greater than 1;
FDERthe access mode of the distributed power supply is represented by a value of 1, which indicates that non-dedicated access is available, and a value of 0, which indicates that dedicated access is available.
Preferably, the step of determining the access point of the distributed power source in step 5) is as follows,
if FDERWhen is equal to 0, select VDERiCalculating a weight value of the main transformer in the voltage class corresponding to the zone bit according to a formula (D), then sorting, and taking DijThe i kV voltage level side of a main transformer corresponding to the minimum value in the non-zero numerical values is used as an access point of the distributed power supply;
wherein,
mmaxij-the voltage of the j-th main transformer is now the number of "i" kV outgoing line intervals;
mij-the voltage of the j-th main transformer is now the number of outgoing lines in the "i" kV outgoing line interval;
nij-the voltage of the j-th main transformer is now the number of "i" kV side access distributed power supplies;
CDERkthe voltage of the jth main transformer is the installed capacity of the kth distributed power supply on the 'i' kV side;
dijthe voltage of the distributed power supply to the jth main transformer is the distance of the grid-connected power line at the side of 'i' kV;
di-an upper limit of a prescribed reasonable supply distance for the power supply enterprise at a voltage level of "i" kV;
if FDERWhen the voltage of the distributed power supply is 1, the distributed power supply is connected to a line with the voltage of i kV nearby;
if although VDERiIf the 'i' kV power grid does not meet the determined conditions, the previous voltage class network of the 'i' kV power grid needs to be switched to for selecting a grid-connected point and an access mode until a proper grid-connected point and an access mode are determined; t isij-the area where the distributed power supply is located has the capacity of the jth main transformer with a voltage of "i" kV class.
By adopting the distributed power supply grid-connected point and access mode selection method, aiming at the characteristics of distributed power supply power generation, combining the urban distribution network grid structure and providing comprehensive consideration of the influence factors of the power grid in the area where the distributed power supply is accessed, the influence of the access of the distributed power supply on the safe and stable operation of the power grid is reduced to the maximum extent on the premise of ensuring the distributed power supply to be effectively accessed into the power grid.
Detailed Description
The invention discloses a distributed power supply grid-connected point and access mode selection method, which comprises the following steps:
1) and determining the power generation characteristics of the distributed power supply needing grid connection, wherein the distributed power supply comprises a synchronous motor, an asynchronous motor and a converter type distributed power supply.
2) Knowing the power grid condition of the region where the distributed power supply is located, counting the capacity and load of a single main transformer of each voltage level public substation, and calculating the weighted average value of the capacity of the main transformers of each voltage level, wherein the calculation formula for calculating the weighted average value of the capacity of the main transformers of each voltage level is as follows,
in the above-mentioned formula, the compound of formula,
-the weighted average of the main transformer capacity with voltage of "i" kV accessible in the area where the distributed power supply is located;
the i-voltage grade can be 380V, 10kV, 35kV and the like generally;
ni-the number of main transformers with voltage of i kV in the area where the distributed power supply is located;
Tij-the area where the distributed power supply is located has the capacity of the jth main transformer with a voltage of "i" kV class;
Lij-the load factor of the jth main transformer with a voltage of "i" kV class in the area where the distributed power supply is located;
the L-constant is a threshold value of the load rate of the main transformer and can be selected according to the condition of the power grid;
if((Lij－L)>0) -judging the weight, which is (L)ij－L)>The value of 0 is 1, otherwise the value is 0.
3) Preliminarily selecting the grid-connected voltage grade according to the power generation capacity of the distributed power supply, wherein the formula for selecting the grid-connected voltage grade is as follows,
in the above-mentioned formula, the compound of formula,
-the voltage in the area of the distributed power supply is a weighted average of the main transformer capacity of "i" kV;
the i-voltage grade can be 380V, 10kV, 35kV and the like generally;
NT-a constant greater than 1;
CDER-installed capacity of the distributed power supply;
a value of whenThe value is 1, otherwise, the value is 0;
VDERithe initial selection zone bit of the distributed power supply access voltage class, when the value of the zone bit is 1, indicates that the zone bit can be incorporated into a power grid with the voltage of i kV, and generally two voltage classes are adopted.
4) Determining the access mode of the distributed power supply, wherein the determination formula of the access mode of the distributed power supply is as follows,
in the above-mentioned formula, the compound of formula,
CL-transmission capacity of the grid-tied line;
Nl-a constant greater than 1;
FDERthe access mode of the distributed power supply is represented by a value of 1, which indicates that non-dedicated access is available, and a value of 0, which indicates that dedicated access is available.
5) Determining an access point for the distributed power source, wherein the determining of the access point for the distributed power source comprises,
if FDERWhen is equal to 0, select VDERiCalculating a weight value of the main transformer in the voltage class corresponding to the zone bit according to a formula (D), then sorting, and taking DijThe i kV voltage level side of a main transformer corresponding to the minimum value in the non-zero numerical values is used as an access point of the distributed power supply;
in the above-mentioned formula, the compound of formula,
mmaxij-the voltage of the j-th main transformer is now the number of "i" kV outgoing line intervals;
mij-the voltage of the j-th main transformer is now the number of outgoing lines in the "i" kV outgoing line interval;
nij-the voltage of the j-th main transformer is now the number of "i" kV side access distributed power supplies;
CDERkthe voltage of the jth main transformer is the installed capacity of the kth distributed power supply on the 'i' kV side;
dijthe voltage of the distributed power supply to the jth main transformer is the distance of the grid-connected power line at the side of 'i' kV;
di-an upper limit of a prescribed reasonable supply distance for the power supply enterprise at a voltage level of "i" kV;
if FDERWhen the voltage of the distributed power supply is 1, the distributed power supply is connected to a line with the voltage of i kV nearby;
if although VDERiIf the voltage level of the i-kV power grid is 1 but the i-kV power grid does not meet the conditions determined in the steps, switching to the last voltage level of the i-kV power grid, and selecting a grid connection point and an access mode according to the steps again until a proper grid connection point and an access mode are determined; t isij-the area where the distributed power supply is located has the capacity of the jth main transformer with a voltage of "i" kV class.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims (5)

1. A distributed power supply grid-connected point and access mode selection method is characterized by comprising the following steps:
1) determining the power generation characteristics of a distributed power supply needing grid connection;
2) the method comprises the steps of knowing the power grid condition of a region where a distributed power supply is located, counting the capacity and load of a single main transformer of each voltage level public substation, and calculating the weighted average value of the capacities of the main transformers of each voltage level;
3) preliminarily selecting a grid-connected voltage grade according to the power generation capacity of the distributed power supply;
4) determining an access mode of a distributed power supply;
5) determining access points for distributed power sources
The calculation formula for calculating the weighted average value of the main transformer capacity of each voltage class in the step 2) is as follows:
T ‾ i = Σ j = 1 n i T i j × i f ( ( L i j - L ) > 0 ) Σ j = 1 n i i f ( ( L i j - L ) > 0 ) - - - ( a )
wherein,
-the weighted average of the main transformer capacity with voltage of "i" kV accessible in the area where the distributed power supply is located;
i-voltage level;
ni-the number of main transformers with voltage of i kV in the area where the distributed power supply is located;
Tij-the area where the distributed power supply is located has the capacity of the jth main transformer with a voltage of "i" kV class;
Lij-the area of the distributed power supply has the load of the jth main transformer with voltage of "i" kV class
Rate; the L-constant is a threshold value of the load rate of the main transformer and can be selected according to the condition of the power grid;
if((Lij－L)>0) -judging the weight, which is (L)ij－L)>The value of 0 is 1, otherwise the value is 0.
2. The distributed power grid-connected point and access method selection method according to claim 1, wherein: the distributed power supply in the step 1) comprises a synchronous motor, an asynchronous motor and an inverter type distributed power supply.
3. The distributed power grid-connected point and access method selection method according to claim 1, wherein: the formula of the grid-connected voltage grade selected in the step 3) is as follows,
V D E R i = i f ( C D E R < T &OverBar; i N T ) - - - ( b )
wherein, on
In the formula,
-the voltage in the area of the distributed power supply is a weighted average of the main transformer capacity of "i" kV;
i-voltage level;
NT-a constant greater than 1;
CDER-installed capacity of the distributed power supply;
a value of whenThe value is 1, otherwise, the value is 0;
VDERia preliminary selected flag bit for the class of the distributed power supply access voltage, whose value is 1, indicating that the incorporable voltage is
The power grid of the 'i' kV can be obtained by taking two voltage grades.
4. The distributed power grid-connected point and access method selection method according to claim 1, wherein: the determination formula of the access mode of the distributed power supply in the step 4) is as follows,
F D E R = i f ( C D E R < C L N l ) - - - ( c )
wherein,
CL-transmission capacity of the grid-tied line;
Nl-a constant greater than 1;
FDERthe access mode of the distributed power supply is represented by a value of 1, which indicates that non-dedicated access is adopted, and a value of 0, which indicates that dedicated access is adopted.
5. The distributed power grid-connected point and access method selection method according to claim 1, wherein: the determination step of the access point of the distributed power source in step 5) is as follows,
if FDERWhen is equal to 0, select VDERiCalculating a weight value of the main transformer in the voltage class corresponding to the zone bit according to a formula (D), then sorting, and taking DijThe i kV voltage level side of a main transformer corresponding to the minimum value in the non-zero numerical values is used as an access point of the distributed power supply;
D i j = i f ( m i j < m max i j ) ( C D E R + &Sigma; k = 1 n i j C D E R k T i j + d i j d i ) - - - ( d )
wherein,
mmaxij-the voltage of the j-th main transformer is now the number of "i" kV outgoing line intervals;
mij-the voltage of the j-th main transformer is now the number of outgoing lines in the "i" kV outgoing line interval;
nij-the voltage of the j-th main transformer is now the number of "i" kV side access distributed power supplies;
CDERkthe voltage of the jth main transformer is the installed capacity of the kth distributed power supply on the 'i' kV side;
dijthe voltage of the distributed power supply to the jth main transformer is the distance of the grid-connected power line at the side of 'i' kV;
di-an upper limit of a prescribed reasonable supply distance for the power supply enterprise at a voltage level of "i" kV;
Tij-the area where the distributed power supply is located has the capacity of the jth main transformer with a voltage of "i" kV class;
CDER-installed capacity of the distributed power supply;
a value of whenThe value is 1, otherwise, the value is 0;
if FDERWhen the voltage of the distributed power supply is 1, the distributed power supply is connected to a line with the voltage of i kV nearby; if although VDERiIf the i-kV power grid does not meet the determined conditions, the previous voltage class network of the i-kV power grid needs to be switched to for selecting a grid connection point and an access mode until a proper grid connection point and an access mode are determined.
CN201310310252.XA 2013-07-23 2013-07-23 Distributed power supply grid-connected point and access mode selection method Active CN104348180B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310310252.XA CN104348180B (en) 2013-07-23 2013-07-23 Distributed power supply grid-connected point and access mode selection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310310252.XA CN104348180B (en) 2013-07-23 2013-07-23 Distributed power supply grid-connected point and access mode selection method

Publications (2)

Publication Number Publication Date
CN104348180A CN104348180A (en) 2015-02-11
CN104348180B true CN104348180B (en) 2017-04-19

Family

ID=52503235

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310310252.XA Active CN104348180B (en) 2013-07-23 2013-07-23 Distributed power supply grid-connected point and access mode selection method

Country Status (1)

Country Link
CN (1) CN104348180B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106505608B (en) * 2015-09-06 2019-01-29 武汉大学 Meter and the distributed generation resource calculation of penetration level method of capacity of short circuit constraint
CN107276118B (en) * 2017-05-31 2019-08-16 广州供电局有限公司 The more distributed generation resource power output control method for coordinating of distribution line and system, storage medium
CN109245170B (en) * 2018-11-08 2021-12-31 国网能源研究院有限公司 Distribution network-friendly distributed power supply grid-connected case library design method

Citations (2)

* Cited by examiner, † Cited by third party
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
CN102903016A (en) * 2012-09-28 2013-01-30 南方电网科学研究院有限责任公司 Distributed power generation planning method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9225173B2 (en) * 2011-09-28 2015-12-29 Causam Energy, Inc. Systems and methods for microgrid power generation and management
US20130119770A1 (en) * 2011-11-11 2013-05-16 Jianlin Guo Network Architectures for Distributed Resource Management in Electric Power Systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
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
CN102903016A (en) * 2012-09-28 2013-01-30 南方电网科学研究院有限责任公司 Distributed power generation planning method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
分布式发电接入政策措施研究;胡波，汪少勇;《电力勘测设计》;20110430(第2期);第50－56页 *

Also Published As

Publication number Publication date
CN104348180A (en) 2015-02-11

Similar Documents

Publication Publication Date Title
CN108418255B (en) Planning method and system suitable for extra-high voltage direct current outgoing power grid containing high-permeability new energy
WO2016141683A1 (en) Implementation method for energy internet absorbing large-scale distributed power supply
Ghiani et al. Impact of renewable energy sources and energy storage technologies on the operation and planning of smart distribution networks
CN109995089B (en) Distributed power supply absorption capacity assessment method and system
CN107134785B (en) Power transmission network voltage coordination optimization control method considering network structure optimization
CN110896231B (en) Distributed photovoltaic capacity receiving calculation method and system for power distribution network in poverty alleviation area
CN107230999B (en) Regional distributed photovoltaic maximum capacity access evaluation method
CN103530817A (en) Distributed photovoltaic grid-connected adaptability evaluation method
CN104917173A (en) Power distribution network optimization method adapting to power distribution network high capacity load transfer
CN111009906B (en) Reactive compensation balancing method for full cable net rack
Katić et al. Impact of V2G operation of electric vehicle chargers on distribution grid during voltage dips
CN103745267A (en) Distributed photovoltaic system grid connection influence evaluation method
CN105048521A (en) Method for calculating direct current access capability of receiving end power grid with consideration of multiple constraints
CN104348180B (en) Distributed power supply grid-connected point and access mode selection method
Paliwal et al. Distributed generator placement for loss reduction and improvement in reliability
CN105514987A (en) 10kV distribution circuit distributed photovoltaic constant volume method and system
Koch et al. Time-series simulations and assessment of smart grid planning options of distribution grids
WO2024093152A1 (en) Distributed voltage clamping method for 100%-new-energy sending-end power grid
Bollen et al. CIGRE/CIRED C4. 24–power quality in the future grid–first introduction
Li et al. Capacity configuration method of hybrid energy storage system for stand-alone photovoltaic generation system
Poullikkas et al. Storage solutions for power quality problems in cyprus electricity distribution network
Yu et al. Challenges and R&D opportunities of smart distribution grids in China
Yang et al. Control scheme for energy storage in domestic households
Bibin et al. Value assessment of energy storage to support large scale PV integration
CN105896533A (en) Static safety evaluation method of active distribution network

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant