CN101964542B - Method for accessing IEC61970 dispatching EMS system to IEC61850 digital transformer substation - Google Patents

Method for accessing IEC61970 dispatching EMS system to IEC61850 digital transformer substation Download PDF

Info

Publication number
CN101964542B
CN101964542B CN2010102621200A CN201010262120A CN101964542B CN 101964542 B CN101964542 B CN 101964542B CN 2010102621200 A CN2010102621200 A CN 2010102621200A CN 201010262120 A CN201010262120 A CN 201010262120A CN 101964542 B CN101964542 B CN 101964542B
Authority
CN
China
Prior art keywords
model
iec61850
transformer station
transformer substation
ems
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
CN2010102621200A
Other languages
Chinese (zh)
Other versions
CN101964542A (en
Inventor
张亮
祝项英
金乃正
章立宗
许伟国
张锋明
王金岩
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
China Electric Power Research Institute Co Ltd CEPRI
Shaoxing Electric Power Bureau
Original Assignee
Shaoxing Electric Power Bureau
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 Shaoxing Electric Power Bureau filed Critical Shaoxing Electric Power Bureau
Priority to CN2010102621200A priority Critical patent/CN101964542B/en
Publication of CN101964542A publication Critical patent/CN101964542A/en
Application granted granted Critical
Publication of CN101964542B publication Critical patent/CN101964542B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16Electric power substations
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/40Display of information, e.g. of data or controls

Abstract

The invention discloses a method for accessing an IEC61970 dispatching EMS system to an IEC61850 digital transformer substation, which comprises the following steps of: (1) supplying a main station transformer substation topological graph and a full transformer substation model to the EMS system by the digital transformer substation; (2) resolving the transformer substation model, namely converting an IEC61850 model into an IEC61970 model and automatically generating a parameter library of the EMS system; and (3) communicating with a digital transformer substation gateway machine by IEC61850+-like communication standard to realize transceiving of transformer substation information. The dispatching system is communicated with the transformer substation by adopting an IEC61850+-like protocol so that protocol conversion is not needed; and the dispatching system has better interoperability, can reduce operations of debugging and maintenance, and reduces time and operation for increasing anew station into the EMS.

Description

A kind of method of the IEC61970 scheduling EMS access IEC61850 of system digital transformer substation
Technical field
The scheduling EMS system that the present invention relates to meet in a kind of electric power system the IEC61970 standard inserts the method for the digital transformer substation that meets the IEC61850 standard.
Background technology
Under the promotion of intelligent grid planning; Following digital transformer substation will become the main flow of newly-built transformer station; Domestic tens of the digital transformer substations that put into operation successively; But current I EC 61850 standards only are applied to the intelligent electronic device in the transformer station, and traditional I EC60870-5-101 or IEC60870-5-104 stipulations are still adopted in the communication between transformer station and the control centre, and this just needs remote station to carry out protocol conversion.The more important thing is; Because traditional stipulations are not supported OO modeling method, must the object of IEC 61850 be converted into several information points, cause the extremely forwarding information configuration effort of complicacy; Increased the workload of configuration and debugging greatly, and easy error.In addition, for the information that can't change, can only simply abandon.
Communication service based on IEC61850 in the transformer station is the object-oriented pattern with self-described; And the IEC60870-5 series communication protocol towards information point is adopted in the communication between current transformer station and the scheduling station EMS system mostly; Traffic model between the two makes up and has sizable difference; Digitized transformer station model can't directly dock with scheduling station EMS system; This causes after digital transformer substation is according to modeling of IEC61850 standard object and Information Monitoring, and which type of mode to scheduling station model extendible, seamless coordination to be provided through is current urgency problem to be solved with data integrated communication.Therefore, from aspects such as technical standpoint, safety factor, practicality, setting up the method that the comparatively remarkable electric power system EMS main website of powerful a, practicality of cover and versatility inserts digital transformer substation is emphasis of the present invention.
Summary of the invention
The purpose of this invention is to provide the method that the scheduling EMS system that meets the IEC61970 standard in a kind of electric power system inserts the digital transformer substation that meets the IEC61850 standard.The present invention proposes dispatching patcher and adopts type IEC 61850+ agreement and transformer station to carry out communication, so just need not pass through protocol conversion, and interoperability is better, the work of can reduce debugging, safeguarding.And dispatching patcher can directly be visited IEC 61850 object models, converts IEC 61970 models into, and the automatically generated data storehouse is reduced and in EMS, to be increased new factory stand needed time and work.
In order to achieve the above object, solution of the present invention is:
A kind of method of the IEC61970 scheduling EMS access IEC61850 of system digital transformer substation comprises the steps:
(1) digital transformer substation offers transformer station of main website of EMS system topological graph, and transformer station's model of standing entirely;
(2) transformer station model is resolved: merge the model of the various IEC61850 of meeting of observing and controlling in the transformer station, protection and other IED equipment; In transformer station, set up a complete model that comprises all IED equipment in the station, through the model parsing module IEC61850 model is also generated automatically the parameter library of EMS system then to the conversion of IEC61970 model; Based on network model conversion technology is revised the information that has realized scheduling station through the integration of IEC61850 digitized transformer station model and is inserted; Make seamless being linked in the scheduling station CIM model of digitized transformer station model ability of setting up, realize that scheduling station model and digitized transformer station model merge through IEC61850.
(3) communication of EMS system and transformer station: be the basis with standard IEC 61850; Increased this level of control centre; Increased a Substation (transformer station) class model in the standard, such provides GetSubstationDirectory (obtaining the substation bibliographic structure) service to retrieve whole IED names or the FILE name that communication gate is acted on behalf of; Accordingly, this hierarchical relationship of IED under other ACSI abstract service interface need increase in the ObjectReference (object reference) of request and response results.Proposed the communication standard of type IEC61850+ on this basis, communicated the transmitting-receiving that realizes transformer station's information, realized the communication interface completion EMS system of type IEC61850+ standard and the communication function between the transformer station with the digital transformer substation gateway machine.
Transformer station's topological graph that described digital transformer substation and main website of EMS system are exchanged adopts in form sending of SVG formatted file; Utilize the SVG reference format to make transformer station's topological graph can be by the non-maintaining use of main website.
The described transformer station model of standing entirely adopts on the SCD formatted file of IEC61850 standard and send, and metadata is corresponding one by one in the name attribute that requires primary equipment in the SCD file and the SVG file; Measurement amount attribute comprises the variable reference name in the SCD model in the SVG graphic file.
Described type IEC61850+ communication standard is on the basis of IEC61850 standard, has defined the communication structure between EMS system and the digital transformer substation, with a kind of communication protocol of communicating by letter between the transformer station gateway machine.Such IEC61850+ communication standard has been considered the system configuration between scheduling EMS and the digital transformer substation; On the 3-tier architecture of IEC61850 standard; Increased this level of control centre; Increased a Substation (transformer station) class model in the standard, such provides GetSubstationDirectory to serve and retrieves whole IED names or the FILE name that communication gate is acted on behalf of; Accordingly, this hierarchical relationship of IED under other ACSI abstract service interface need need to increase in the ObjectReference (object reference) of request and response results.
Described communication function comprises: according to the service that the substation provides, carry out the following biography of uploading and ordering of data, i.e. remote signalling, remote measurement, remote control; Simultaneously, on the EMS client utility, the debugging interface with transformer station's communication is provided.
Beneficial effect of the present invention: along with the newly-built transformer station based on IEC61850 is more and more with transformation transformer station; Can progressively display towards the scheduling station EMS system communication of information point and the communication contention aware between the OO transformer substation communication and efficient, effectively addressing this problem is to have very much realistic meaning.The present invention is through resolving the transformer station model that meets the IEC61850 standard; Merge the model of the various IEC61850 of meeting of observing and controlling in the transformer station, protection and other IED equipment, in transformer station, set up a complete model that comprises all IED equipment in the station.On this basis model is integrated modification,,, accomplish function the digitlization supervisory control of substation the service function access dispatching end that all kinds of device provided with the requirement of adaption scheduling EMS.The present invention studies dispatching patcher and adopts type IEC 61850+ agreement and transformer station to carry out communication, so just need not pass through protocol conversion, and interoperability is better, the work of can reduce debugging, safeguarding.On the other hand, dispatching patcher can directly be visited IEC 61850 object models, converts IEC 61970 models into, and the automatically generated data storehouse is reduced and in EMS, to be increased new factory stand needed time and work.
Description of drawings
Fig. 1 is a basic procedure sketch map of the present invention.
Embodiment
Below in conjunction with Fig. 1 principle of the present invention and particular content are elaborated.
The scheduling EMS system that meets the IEC61970 standard in a kind of electric power system of present embodiment inserts the method for the digital transformer substation that meets the IEC61850 standard, comprises the steps:
(1) digital transformer substation offers transformer station of main website of EMS system topological graph, and transformer station's model of standing entirely; Transformer station's topological graph that described digital transformer substation and main website of EMS system are exchanged adopts in form sending of SVG formatted file; Utilize the SVG reference format to make transformer station's topological graph can be by the non-maintaining use of main website.
The described transformer station model of standing entirely adopts on the SCD formatted file of IEC61850 standard and send; Wherein the SCD file has comprised the transformer station model and the IED mounted cast of main website modeling needs; Transformer station model has mainly been described the interrelated of primary equipment and their annexation, and the IED mounted cast has been described model and function of substation secondary intelligent electronic device etc.In the SCD file in the name attribute of primary equipment and the SVG file metadata corresponding one by one, measurement amount attribute comprises the variable reference name in the SCD model in the SVG graphic file.
(2) transformer station model is resolved: merge the model of the various IEC61850 of meeting of observing and controlling in the transformer station, protection and other IED equipment; In transformer station, set up a complete model that comprises all IED equipment in the station, through the model parsing module IEC61850 model is also generated automatically the parameter library of EMS system then to the conversion of IEC61970 model; Comprise device parameter, measurement information, annexation etc.The IEC61850 front end processor need dispose transformer station's gateway information, comprises the SCD filename and the SVG graphic file of gateway address, correspondence.Transformer station model information is directly obtained from the SCD file.When digital transformer substation has change, need resubmit SCD and SVG file, SVG directly uses, and the SCD file is used for carrying out again model analysis, upgrades EMS database parameter table.
Based on network model conversion technology is revised the information that has realized scheduling station through the integration of IEC61850 digitized transformer station model and is inserted; Make seamless being linked in the scheduling station CIM model of digitized transformer station model ability of setting up, realize that scheduling station model and digitized transformer station model merge through IEC61850.The DF8600 data integration platform can use to offer the EMS system that meets the IEC61970 standard exporting as the CIM model that meets the IEC61970 standard through conversion IEC61850 model; And can change without graphical format, the SVG file that directly uses transformer station to provide carries out the graphical interaction demonstration.
(3) communication of EMS system and transformer station: be the basis with standard IEC 61850; Increased this level of control centre; Increased a Substation (transformer station) class model in the standard, such provides GetSubstationDirectory (obtaining the substation bibliographic structure) service to retrieve whole IED names or the FILE name that communication gate is acted on behalf of; Accordingly, this hierarchical relationship of IED under other ACSI abstract service interface need increase in the ObjectReference (object reference) of request and response results.Proposed the communication standard of type IEC61850+, communicated the transmitting-receiving that realizes transformer station's information, realized the communication interface completion EMS system of type IEC61850+ standard and the communication function between the transformer station with the digital transformer substation gateway machine.Described type IEC61850+ communication standard is on the basis of IEC61850 standard, has defined the communication structure between EMS system and the digital transformer substation, with a kind of communication protocol of communicating by letter between the transformer station gateway machine.This agreement is that the demand and the characteristics process of on the basis of standard IEC 61850 communication protocols, communicating by letter with EMS according to transformer station increase level and transformer station's class model and service, is an expansion of standard IEC 61850 communication protocols.This agreement is obtained under the situation of transformer station's information at off-line through the SCD file; Can realize Substation class model and service; It is less that each backstage producer of transformer station implements difficulty like this, is convenient to promote, for communication module; Consider among the present ObjectReference (object reference) and comprised IEDName and LDinst name among the LDName; Can distinguish affiliated IED device according to LDName, in program, analyze each IED of difference and get final product, not need on existing program, to do too big change.In addition, do not need to reintegrate again yet, directly use the SCD file of transformer station to obtain the station inner model for the model in the transformer station.

Claims (4)

1. the method for the IEC61970 scheduling EMS access IEC61850 of a system digital transformer substation is characterized in that comprising the steps:
(1) digital transformer substation offers transformer station of main website of EMS system topological graph, and transformer station's model of standing entirely;
(2) transformer station model is resolved: merge the model of the various IEC61850 of meeting of observing and controlling in the transformer station, protection and other IED equipment; In transformer station, set up a complete model that comprises all IED equipment in the station, through the model parsing module IEC61850 model is also generated automatically the parameter library of EMS system then to the IEC61970 model conversion; Based on network model conversion technology is revised the information that has realized scheduling station through the integration of IEC61850 digitized transformer station model and is inserted; Make seamless being linked in the scheduling station CIM model of digitized transformer station model ability of setting up, realize that scheduling station model and digitized transformer station model merge through IEC61850;
(3) communication of EMS system and transformer station: be the basis with standard IEC 61850; Increased this level of control centre; Increased the class model of a transformer station in the standard, such provides the service of obtaining the substation bibliographic structure to retrieve whole IED names or FILE name that communication gate is acted on behalf of; Accordingly, this hierarchical relationship of IED under other ACSI abstract service interface need increase in the object reference of request and response results; Proposed the communication standard of type IEC61850+, communicated the transmitting-receiving that realizes transformer station's information, realized the communication interface completion EMS system of type IEC61850+ standard and the communication function between the transformer station with the digital transformer substation gateway machine.
2. the method for a kind of IEC61970 scheduling EMS access IEC61850 of system digital transformer substation as claimed in claim 1, it is characterized in that: transformer station's topological graph that described digital transformer substation and main website of EMS system are exchanged adopts in form sending of SVG formatted file; The described transformer station model of standing entirely adopts on the SCD formatted file of IEC61850 standard and send, and metadata is corresponding one by one in the name attribute that requires primary equipment in the SCD file and the SVG file; Measurement amount attribute comprises the variable reference name in the SCD model in the SVG graphic file.
3. the method for a kind of IEC61970 scheduling EMS access IEC61850 of system digital transformer substation as claimed in claim 1; It is characterized in that: described type of IEC61850+ communication standard is on the basis of IEC61850 standard; Defined the communication structure between EMS system and the digital transformer substation, with a kind of communication protocol of communicating by letter between the transformer station gateway machine.
4. the method for a kind of IEC61970 scheduling EMS access IEC61850 of system digital transformer substation as claimed in claim 1; It is characterized in that: described communication function comprises: the service that provides according to the substation; Carry out the following biography of uploading and ordering of data, i.e. remote signalling, remote measurement, remote control; Simultaneously, on the EMS client utility, the debugging interface with transformer station's communication is provided.
CN2010102621200A 2010-08-20 2010-08-20 Method for accessing IEC61970 dispatching EMS system to IEC61850 digital transformer substation Active CN101964542B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102621200A CN101964542B (en) 2010-08-20 2010-08-20 Method for accessing IEC61970 dispatching EMS system to IEC61850 digital transformer substation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010102621200A CN101964542B (en) 2010-08-20 2010-08-20 Method for accessing IEC61970 dispatching EMS system to IEC61850 digital transformer substation

Publications (2)

Publication Number Publication Date
CN101964542A CN101964542A (en) 2011-02-02
CN101964542B true CN101964542B (en) 2012-07-25

Family

ID=43517328

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010102621200A Active CN101964542B (en) 2010-08-20 2010-08-20 Method for accessing IEC61970 dispatching EMS system to IEC61850 digital transformer substation

Country Status (1)

Country Link
CN (1) CN101964542B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102209108A (en) * 2011-05-16 2011-10-05 广东电网公司深圳供电局 Method and system for realizing seamless communication between master scheduling station and substation of power grid
CN102957205B (en) * 2012-02-08 2015-12-16 深圳市金宏威技术有限责任公司 A kind of method and system setting up electricity distribution network model
CN102693129B (en) * 2012-04-28 2015-10-21 广东电网公司电力科学研究院 The model conversion method of IEC61850 to 61970 and device
CN102710435B (en) * 2012-05-14 2015-03-25 中国电力科学研究院 System integration interface adapter based on common information model (CIM)
CN102799620B (en) * 2012-06-19 2014-09-10 中国电力科学研究院 Design method for interface of IEC 61850 universal database information model
CN102760194B (en) * 2012-07-31 2015-02-11 广东电网公司电力科学研究院 Method and system for combining common information models (CIMs) of transformer substations and master scheduling station
CN103198041B (en) * 2013-02-28 2016-06-22 河北省电力建设调整试验所 A kind of method realizing setting up IEC61970 GID interface
CN103713523A (en) * 2013-12-27 2014-04-09 北京四方继保自动化股份有限公司 Influencing analysis method of whole intelligent substation model
CN104503977B (en) * 2014-11-27 2020-05-19 国家电网公司 Primary and secondary information model sharing system and method for electric power SCADA system
CN105429869B (en) * 2015-11-11 2018-07-06 国网天津市电力公司 A kind of integrated information exchange intelligent network shutdown in boss station
CN107147717A (en) * 2017-05-10 2017-09-08 南京南瑞继保电气有限公司 Delivery method in a kind of status information for electric substation automation system
CN109582719B (en) * 2018-10-19 2021-08-24 国电南瑞科技股份有限公司 Method and system for automatically linking SCD file of intelligent substation to virtual terminal
CN109462283A (en) * 2018-11-12 2019-03-12 山东鲁能智能技术有限公司 Intelligent substation individual equipment flux monitoring method and system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101710735A (en) * 2009-12-11 2010-05-19 江西省电力科学研究院 Sharing modeling method of intelligent substation and primary station

Also Published As

Publication number Publication date
CN101964542A (en) 2011-02-02

Similar Documents

Publication Publication Date Title
CN101964542B (en) Method for accessing IEC61970 dispatching EMS system to IEC61850 digital transformer substation
CN101873008B (en) Method for converting SCD (Substation Configuration Description) model into dispatching center CIM (Common Information Model)
CN102880792B (en) A kind of dynamic modelling method of the conventional substation based on IEC standard
CN103488835B (en) The emulation platform of a kind of dispatch automated system and emulation mode thereof
CN101917067B (en) Method for integrating power equipment state monitoring devices
CN102518553B (en) Remote real-time monitoring system used for wind power station group
CN102209108A (en) Method and system for realizing seamless communication between master scheduling station and substation of power grid
CN102832703B (en) Transformer station and scheduling station model fast conversion method based on model conversion machine
CN105095600B (en) A kind of intelligent substation and regulation and control center cooperative modeling method
CN103295163A (en) Chart-model integrated transformer substation and dispatch master station cooperation modeling method
CN102929911A (en) All-in-one modeling method for transformer substation and dispatching master station
CN101447698B (en) Centralized type wave recording system of digital transformer substation
CN201518429U (en) Electric energy qualitative data concentrator for digitalization transforming plant
CN102916407A (en) Relay protection and fault information management system for regional power grid
CN101697551A (en) Networked power telecontrol communication method
CN107945052A (en) A kind of distribution power automation terminal information overall process automatically accesses method
CN201255753Y (en) Electricity energy quality monitoring and analysis system based on network
CN103825956B (en) The implementation method of the remote control and regulation technology based on agency service
CN102647027A (en) Method for realizing construction of power quality data exchanging interface
CN110380512A (en) The intelligent distribution network coordinated control system and method for the information containing synchronized phasor
CN106292576B (en) A kind of mapping method of SCL models and CIM model
CN102096992A (en) OPC communication-based energy consumption monitoring system and building method thereof
CN110768372A (en) IEC61850 standard-based protection information system source end modeling method
CN103324693A (en) Modeling method based on international electro technical commission (IEC) 61850 protocol and extensive makeup language (XML) database
CN103716306B (en) Transformer station and the seamless communication method of scheduling station

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: STATE ELECTRIC NET CROP. CHINA ELECTRIC POWER RESE

Effective date: 20130107

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20130107

Address after: 312000 Shaoxing Shengli Road, Zhejiang, No. 58

Patentee after: Shaoxing Power Bureau

Patentee after: State Grid Corporation of China

Patentee after: China Electric Power Research Institute

Address before: 312000 Shaoxing Shengli Road, Zhejiang, No. 58

Patentee before: Shaoxing Power Bureau

C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Inventor after: Zhang Liang

Inventor after: Zhu Xiangying

Inventor after: Wang Min

Inventor after: Jin Naizheng

Inventor after: Zhang Lizong

Inventor after: Xu Weiguo

Inventor after: Zhang Fengming

Inventor after: Wang Jinyan

Inventor before: Zhang Liang

Inventor before: Zhu Xiangying

Inventor before: Jin Naizheng

Inventor before: Zhang Lizong

Inventor before: Xu Weiguo

Inventor before: Zhang Fengming

Inventor before: Wang Jinyan

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: ZHANG LIANG ZHU XIANGYING JIN NAIZHENG ZHANG LIZONG XU WEIGUO ZHANG FENGMING WANG JINYAN TO: ZHANG LIANG ZHU XIANGYING WANG MIN JIN NAIZHENG ZHANG LIZONG XU WEIGUO ZHANG FENGMING WANG JINYAN