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1、精品学习资源110 kV substations digital transformation case analysisAbstractThis paper brieflyintroduces the basic concept ofdigitalsubstation, Analysisedsubstation digitizationreconstruction examples based on110kVsubstationsA.detailed analysised ofthe substation secondary equipmentsuch aschanges in operat
2、ing mode.Digital Substation discussed possible options for reform, and according to the results of the operation of digital substation work out countermeasures and Recommended.Key words digital substation； automation； Electronic TransformerWith automation and computer network traffic monitoring and
3、protection technology, the rapid development in Past two decadeshas made substantial progress has been achieved for the digital substation automation system . Network laid the technical foundationforfulfillingthe other hand, withthe special high-voltagelarge- capacity .The gradual formation of large
4、 scale grid, the grid stable and reliable control of the safety information exchange ， And put forward higher requirements of the urgent. Digital Substation substation construction will be Trends .1. the characteristics of digital substationThe basic features of digital substation can be summarized
5、as: intelligent primary equipment, secondary equipment network, automated operation and management system. Since the station relative toconventional integrated, digitalsubstation equipment,theprotectiveprinciple,theinternalalgorithm,logichasnot fundamentally changed, but in sampling digital, network
6、ed communication medium, communication interface standardization brought changes to improve the reliability ofsubstation automation system. Reliability of information transmission can be achieved； secondary wiring is simple； measurement accuracy； share unified information platform, reduce duplicatio
7、n of equipment ； easy functionality expansion； management automation.2. 110 kV Substation rehabilitation programs1 a part of. 110kV single busbar sub-main wiring methods, 110kV line 3 times, with a standby power source； the main volume into 2 sets of 3 variables ； 35kV main connection method for the
8、 Single Bus, 35kV line 5 back； 10kV main connection is a single busbar way, 2 sets of capacitors, 10kV line 18 back, 2 sets of ground change,the replacement oftransformers forthe electronic, installationofPT parallel combiner； replacement in situ terminal box, installation switches intelligent unit,
9、 to achieve local control switch ； configuration integrated digital protection monitoring devices and digital power meter, equipped with digital standby power source device,care monitoring devices and focus group screen interval of combiner.2 station control layer. Station control layer consists of
10、a units monitoring host, 2 Machines GPS communications management component to form the station control level star network, monitoringthe host machine automatically selects the host communication management, communication management unit and the interval as an independent link layer device, and the
11、bay level devices communication, accessto remote, telemetry data, only the host with the remote authority, communication management unit interval of five anti-blocking cross-sequence and function of small欢迎下载精品学习资源current grounding line, for the interval layer and process layer device when the hard
12、right.3 spacer. Interval layer is the core of the station automation, communications related to the implementation of the process level GOOSE 35kV, 10kV lines, capacitors, ground change, sub-protective and monitoringlocal installation ； 110kV Main Transformer Protection and Control focus group back
13、screen, installed in the control Room, located optical interface screen, providing the distance to the control room of the optical conversion interface； three sides of the main transformer backup protection one, 110kV segmentation and one prepared from the cast； monitoring interface communication, l
14、ockout protection association； private GOOSE network to achieve important, the key trip control, station control layer GOOSEnetwork, to achieve control of auxiliary tripping minor, such as the low cycle load shedding.4 the process level. Parallel combination provides voltage voltage, the output inte
15、rval of combiner to provide the voltage signal； the main transformer and back of each side of the differential transformer is divided into, setting separatecombiner, combiner transformer transformer protection group in the main screen； 110kV line segment combiner configured individually, group withi
16、n the control room screen line combiner； 35kV 10kV PT 1 set of each combiner configured to achieve PT parallel functions； arranged in the sub-cabinet； 35kV 10kV part of the accessby small- signal combiner, arranged in switch cabinet.5 communication network. a. station control station control interla
17、yer layer network layer network: set a switch, the Internet communications management unit monitoring host dual GPS； interval layer network: at 10kV I Section II Section were placed on a switch, 35kV put a switch in paragraph , the main cabinet to set up a communications switch, focus group screen s
18、pacer device to the communications network of the main cabinet b. the process level,GOOSE private network.Process layer network: electronic transformer CT interval of combiner access, electronic access to the voltage transformer PT merger, voltage output access interval of combiner combiner ；GOOSE N
19、etwork: ringnetwork composed of 1 # Main Variable interval Protection and Control and smart cell group into a RSG2100, 2 # Main Transformer Protection and Control and intelligence unit interval group into another RSG2100, 110kV lineinterval of Protection and Control and intelligence unit set into an
20、other RSG2100,composed of a single inter-switch interconnect ring.6 After the transformation of the substation has the advantage. a. back-office system integration, are in compliance with requirements of the secondary consolidation； b. with 61850 protocol, consistency, and simple interface without a
21、 lot of signalcable installation and commissioning work is small, can reduce the cost of maintenance and renovation； c. use of electronic CT / PT, non-core, eliminating the magneticsaturation； to avoid the CT open circuit,earth fault inthe secondary circuitproblems； d. long-distance transmission of
22、digital signals using optical fiber, anti- interference ability, reducing the transmission error； of nearly still use the hard- wiring from the transmission, reducing the number of devices to simplify structure.3. substations protection equipment remote monitoring and management systems analysis and
23、 design欢迎下载精品学习资源1 substation protection equipment remote monitoring and management system The system for power companies to protect managements application requirementsdesigned to protect the department aims to provide a management and maintenance of station equipment platform, the system should me
24、et the following features: timely, accurate collection of station equipment, real-time information； accurate monitoringof all setting relay station changes, and timely warning； comprehensive managementof all the relay stations recorded dat；aprovides engineers easy access to any virtualchannels to al
25、l relay stations； provide a friendly user interface for maintenance and欢迎下载精品学习资源managemen；tAccurate and fast data retrieval and quer；yhigh level of security,欢迎下载精品学习资源strict management of operating authority and provides audit functio；n high scalability, maintainability ； system is stable, safe and
26、 reliabl；esystem has a good man-欢迎下载精品学习资源machine interface According to the actual needs of the application of the hierarchicalprinciple and open systems, the whole system is divided into enterprise application layer, service layer, station control management and equipment level.Station control sta
27、tions relay data subsystem is responsible for the collection, processing, valuation and management functions include the following modules: RTDB: RealTime Database, real-time data management, systems management as the core of the system responsible for managing all of the real time data, events, pol
28、ice records； HMI: HumanMachine Interface, local display and control managemen；t DCAl03: DataCollectionApplicationwithIECl03, IECl03 communications processing, complete with support IECl03 relay communications between the Statute, to collectreal-time data sent to relay real-time databas；e as Support
29、103 for the relay settingand recorded data, the corresponding value for manageme；nt Courier: CourierDCA communications processing, complete with relay communication between the relayreal-time data collection, event data, protection setting , recorded da；ta Modbus:ModbusDCA Statute of the communicati
30、on processing； DNP30: DNP3.0 DCAStatute of the data processin；g GD8Calc: GD8-line basis, to provide advancedautomatic calculation and automatic control functions； VC: Virtual Connection Manager, providing a virtual channel with the server connection and, if necessary,send a request to the DCA loan c
31、ommunication chann；el DNPDPA: DPADataProces sApplication type applications, communicate with the server through DNP3.0 statute.This subsystem is responsible for the data collection points, and saved to the server SQLServer database, including the following modules: DC: DataCollection application sta
32、tion control subsystem is responsible for communication and exchange through the DNP3 0 real-time data and event data, and to the real-time da；ta RTDB: real-time data management, including real-time data management, and a variety of real-time data access interface shared memory TCP IP database, and
33、save thehistorical database, to provide lock contro；luser management: Manage user roles,password, operating privilege, etc；.role management, managerial role and define theappropriate authority； configuration management: management station data and communication within the parameters and alarm config
34、uration SMS GSM EMAIL ； graphics production system: user-defined interface production syste；mvirtual serial port, virtual channel dynamic managemen；tevent query Modules:欢迎下载精品学习资源Alarm query module, the station data query module: check the communication relay stations within the state of constant ch
35、ange state, recorded da；taconstant query module； Virtual Connect modules； single line diagram: a graphical user interface欢迎下载精品学习资源provides real-time data Display operation control, etc；.module； operational records check. 2 database design systemhistorical data query； audit欢迎下载精品学习资源Monitoring and m
36、anagement system for the protection of the core is around thestation designed to protect the information data, the database design directly related to the effect and operation of the whole system performance, while the database system to other computer systems, with more objects, longer survival dat
37、a, with high requirements on the maintenance and security of the information related to such issues, so the database design must be carefully and cautiously database design for this system, we propose the following four basic principle to guide the design of the database :a, try to ensure the simpli
38、city of the database, including: simple database structure,data sheets and data sheet design simple relationship between Q and other simple b, to ensure the integrity of database systems, including: the physical integrity of the database system, database, logical integrity, the integrity of the elem
39、ents of the database systemc, to ensure the confidentiality of the database system, including: the database system, the user identity and authority to identify, to ensure that each user and their access to the system is legitimate and can be identified in the design of the time so we can the body of
40、 the user identification and access rights to control the system provides the user can only operate within the purview and ensure the security of system datad, to ensure the availability of database systems, which ensure that the database can access system resources, easy to use and to avoid data co
41、nflicts in the data access process, to ensure no conflict between the data and contradictions in this system, the server database used relational database, and use Microsofts SQL2005Server name of the database design is MinilPACS, stored data are historical data configuration information and event i
42、nformation data, user information configuration data using MS Acces s database, download the station controlled by synchronizing Equipment GD8 can be converted into the CDB CE data formats, and through the papers to copy or synchronize GD84. the operation of digital substationDigital substation syst
43、em to achieve the full hierarchical distributed application； first and second device to achieve effective electrical isolation, interoperability between devices； information integration has increased, reduce the number of automation equipment； station electrical quantities collected United blocking
44、signal transmission and equipment trip command to run all through the fiber opticnetworks； has a higher than conventional automation system reliability, availability, security； substation automation system is to ensure that primary and secondary equipment, the normal operation of the core, daily ope
45、ration and maintenance shouldbe given more attention to the information prompted to run equipmen；tconcerncommunication device alarm interrupt event log information tips； concerns real-time欢迎下载精品学习资源monitoring and control console prompt warning information； network communication interruption should c
46、heck the device prompt the switch state of communication lines； case no display device, it should ascertain whether the loss of power outage, such as the reasons for withdrawal should be identified and then put into operation； after power should conduct a comprehensive inspection to confirm installa
47、tion of the normal operation after running the program is another advantage ofthe current digital 110kV substation south of change remote operation can be achieved has been the general order of the control and operation programmed operation program of the operating system is pre-set through the auto
48、mated process operation of the substation equipment series, issued by the operating instructions is to grant an order by the automated system based on equipment corresponding changes in the amount of remote telemetry to determine the letter of each step is in place, the case confirmation in place th
49、e next step, otherwise the alarm.Conclusion110kV substation digital transformation projects to explore the application of the old station digital transformation technology solutions, to explore the advanced practical and reliable digital substation system structure and model, reflecting the advanced technology, structure is rea