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1、110 kV substations digital transformation case analysisAbstract This paper briefly introduces the basic concept of digital substation，Analysised substation digitization reconstruction examples based on 110 kV substations. A detailed analysised of the substation secondary equipment such as changes in
2、 operating 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 monitorin
3、g and protection technology，the rapid development in Past two decades has made substantial progress has been achieved for the digital substation automation system . Network laid the technical foundation for fulfilling the other hand，with the special high-voltage large-capacity .The gradual formation
4、 of large 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 substation The basic features of digital substation can be sum
5、marized as：intelligent primary equipment，secondary equipment network，automated operation and management system. Since the station relative to conventional integrated，digital substation equipment，the protective principle，the internal algorithm，logic has not fundamentally changed，but in sampling digit
6、al，networked communication medium，communication interface standardization brought changes to improve the reliability of substation automation system. Reliability of information transmission can be achieved；secondary wiring is simple；measurement accuracy；share unified information platform，reduce dupl
7、ication 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 of transformers for the electronic，installation of PT parallel combiner；replacement in situ terminal box，installation switches intelligent unit，to a
9、chieve 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 a uni
10、ts monitoring host，2 Machines GPS communications management component to form the station control level star network，monitoring the host machine automatically selects the host communication management，communication management unit and the interval as an independent link layer device，and the bay leve
11、l devices communication，access to remote，telemetry data，only the host with the remote authority，communication management unit interval of five anti-blocking cross-sequence and function of small current grounding line，for the interval layer and process layer device when the hard right. 3) spacer. Int
12、erval 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 monitoring local installation；110kV Main Transformer Protection and Control focus group back screen，installed in the c
13、ontrol 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，lockout protection association；pr
14、ivate GOOSE network to achieve important，the key trip control，station control layer GOOSE network，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 interval of combiner to provide the vol
15、tage signal；the main transformer and back of each side of the differential transformer is divided into，setting separate combiner，combiner transformer transformer protection group in the main screen；110kV line segment combiner configured individually，group within the control room screen line combiner
16、；35kV 10kV PT 1 set of each combiner configured to achieve PT parallel functions；arranged in the sub-cabinet；35kV 10kV part of the access by small-signal combiner，arranged in switch cabinet. 5) communication network. a. station control station control interlayer layer network layer network：set a swi
17、tch，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 spacer device to the communications network of th
18、e 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 Network：ring network composed of 1 # Main Variable i
19、nterval 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 line interval of Protection and Control and intelligence unit set into another RSG2100，composed of a single inter-switch inte
20、rconnect 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 lot of signal cable installation and commissioning wo
21、rk is small，can reduce the cost of maintenance and renovation；c. use of electronic CT / PT，non-core，eliminating the magnetic saturation；to avoid the CT open circuit，earth fault in the secondary circuit problems；d. long-distance transmission of digital signals using optical fiber，anti-interference ab
22、ility，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 design 1) substation protection equipment remote monitoring
23、and management system The system for power companies to protect managements application requirements designed to protect the department aims to provide a management and maintenance of station equipment platform，the system should meet the following features：timely，accurate collection of station equip
24、ment，real-time information；accurate monitoring of all setting relay station changes，and timely warning；comprehensive management of all the relay stations recorded data；provides engineers easy access to any virtual channels to all relay stations；provide a friendly user interface for maintenance and m
25、anagement；Accurate and fast data retrieval and query；high level of security，strict management of operating authority and provides audit function；system has a high scalability，maintainability；system is stable，safe and reliable；good man-machine interface According to the actual needs of the applicatio
26、n of the hierarchical principle and open systems，the whole system is divided into enterprise application layer，service layer，station control management and equipment level. Station control stations relay data subsystem is responsible for the collection，processing，valuation and management functions i
27、nclude 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，police records；HMI：HumanMachine Interface，local display and control management；DCAl03：DataCollectionApplicationwithIECl
28、03，IECl03 communications processing，complete with support IECl03 relay communications between the Statute，to collect real-time data sent to relay real-time database；as Support 103 for the relay setting and recorded data，the corresponding value for management；Courier：CourierDCA communications process
29、ing，complete with relay communication between the relay real-time data collection，event data，protection setting ，recorded data；Modbus：ModbusDCA Statute of the communication processing；DNP30：DNP3.0 DCA Statute of the data processing；GD8Calc：GD8-line basis，to provide advanced automatic calculation and
30、 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 communication channel；DNPDPA：DPA (DataProces sApplication) type applications，communicate with the server through DNP3.0 statute. This subs
31、ystem is responsible for the data collection points，and saved to the server SQLServer database，including the following modules：DC：DataCollection application station control subsystem is responsible for communication and exchange through the DNP3 0 real-time data and event data，and to the real-time d
32、ata；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 save the historical database，to provide lock control；user management：Manage user roles，password，operating privilege，etc.；role management，manager
33、ial role and define the appropriate authority；configuration management：management station data and communication within the parameters and alarm configuration (SMS GSM EMAIL)；graphics production system：user-defined interface production system；virtual serial port，virtual channel dynamic management；ev
34、ent query Modules：Alarm query module，the station data query module：check the communication relay stations within the state of constant change state，recorded data；constant query module；Virtual Connect modules；single line diagram：a graphical user interface provides real-time data Display operation con
35、trol，etc.；historical data query；audit module；operational records check. 2) database design system Monitoring and management system for the protection of the core is around the station designed to protect the information data，the database design directly related to the effect and operation of the who
36、le system performance，while the database system to other computer systems，with more objects，longer survival data，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
37、 propose the following four basic principle to guide the design of the database ：a，try to ensure the simplicity 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
38、：the physical integrity of the database system，database，logical integrity，the integrity of the elements of the database system c，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
39、 the system is legitimate and can be identified in the design of the time so we can the body of 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 data d，to ensure the availability of database system
40、s，which ensure that the database can access system resources，easy to use and to avoid data conflicts 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 SQLServer name of the database desi
41、gn is MinilPACS，stored data are historical data configuration information and event information 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 co
42、py or synchronize GD8 4. the operation of digital substation Digital substation system 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 o
43、f automation equipment；station electrical quantities collected United blocking signal transmission and equipment trip command to run all through the fiber optic networks；has a higher than conventional automation system reliability，availability，security；substation automation system is to ensure that
44、primary and secondary equipment，the normal operation of the core，daily operation and maintenance should be given more attention to the information prompted to run equipment；concern communication device alarm interrupt event log information tips；concerns real-time monitoring and control console promp
45、t warning information；network communication interruption should check 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
46、should conduct a comprehensive inspection to confirm installation of the normal operation after running the program is another advantage of the current digital 110kV substation south of change remote operation can be achieved has been the general order of the control and operation (programmed operat
47、ion) program of the operating system is pre-set through the automated 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 let
48、ter of each step is in place，the case confirmation in place the next step，otherwise the alarm. Conclusion 110kV substation digital transformation projects to explore the application of the old station digital transformation technology solutions，to explore the advanced practical and reliable digital
49、substation system structure and model，reflecting the advanced technology，structure is reasonable，program innovation，practical implementation，to the role of models and model for future digital substation reconstruction provides a new and valuable experience for reference. 摘要本文简要简介了数字化变电站基本概念，110千伏数字化变电站改造例子。详细分析，如变化经营模式变电站二次设备。数字化变电站讨论也许改革方案，并依照数字化变电站工作了对策和建议运营成果。核心词数字化变电站,自动化，电子式互感器自动化和计算机网络流量监控和保护技术，在过去二十年飞速发展有了长足进步，已实现数字化变电站自动化系统。网络奠定了技术基本，另一方面，用特高电压大容量大型电网逐渐形成，电网稳定和安全信息交