CN102938681A - Method and system for mapping transformer substation abstract communication service interface to network communication - Google Patents
Method and system for mapping transformer substation abstract communication service interface to network communication Download PDFInfo
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Abstract
The invention provides a method and a system for mapping a transformer substation abstract communication service interface (ACSI) to network communication. The method includes the following steps that (1) data to be transmitted are acquired from an ACSI core object service unit; (2) a data frame header is added on the data, and the data are processed to form a data packet; and (3) the data packet is transmitted to Ethernet through a transmission control protocol (tcp) link. The system comprises the ACSI core object service unit, the Ethernet which receives the data of the ACSI core object service unit and a data processing transmitting unit which processes the data of the ACSI core object service unit and transmits the formed data packet to the Ethernet. According to the method and the system for mapping the transformer substation abstract communication service interface to the network communication, lack of original international electrotechnical commission (IEC) 61850 reduce-map process modes is compensated, all service interfaces can be mapped, high communication efficiency can be achieved, requirements of future development of smart power grids are met, and the purpose of seamless communication between intelligentized transformer substation and a control center can be completely achieved.
Description
Technical field
The invention belongs to the Power system data communication field, be specifically related to the method and system that a kind of transformer station Abstract Common Service Interface (ACSI) is mapped to network service.
Background technology
Current existing digital transformer substation intercommunication all adopts the implementation of IEC61850-8-1MMS mapping, still adopts the IEC60870-5-104 Telecontrol Protocol between transformer station and main website.
The MMS used in transformer station's intercommunication, having in actual applications some problems: MMS is the machine building industry standard before two more than ten years, is mainly used in machining center, efficiency is lower, can't meet the power industry requirement of real-time; It is more complicated that the Abstract Common Service Interface of IEC61850 stipulations is mapped to MMS, and can only support sector divide the service interface and can't carry out easily Function Extension; MMS is without 64 release versions, and the hardware platform of main flow has generally all adopted the main frame of 64 at present; Domestic MMS all adopts external product at present, and not yet production domesticization, therefore can't guarantee the fail safe of application system.
And the IEC60870-5-104 communication protocol adopted between transformer station and main website; it is a standard by external introduction; remain the problem in some engineering practices; for example domestic electric power enterprise usually requirement can a distant place revise the protection definite value and the protection actuating signal carried out to rem ote reset; and require the substation end to send the details (comprising operate time, type of action, operating value) of protecting action in active; and, in order to support new function, must carry out special expansion to existing 104 stipulations.And in the process of promoting Intelligent Master and intelligent substation, each dispatching patcher has difference more or less unavoidably to the demand of communication, for different demands, need to carry out different expansions to stipulations, this has caused certain limitation to promoting the intelligent grid building-up work on a large scale.
Continuous growth along with the electrical network scale, domestic transformer substation communication stipulations processing mode commonly used can't adapt to the communication requirement between following Intelligent transformer station inside and transformer station and control centre fully, and subject matter has the following aspects: under the different communication demand, stipulations are safeguarded very complicated; The part stipulations are subject to the coding restriction, can't support the information capacity of following sustainable growth; The tradition telemechanical is relatively independent with the protection communication protocol, is not suitable for the needs of integrated supporting system technology.
Summary of the invention
For overcoming above-mentioned defect, the invention provides the method and system that a kind of transformer station Abstract Common Service Interface is mapped to network service, the deficiency of original IEC61850 stipulations mapping processing mode will be made up, can shine upon whole service interfaces, and there is higher communication efficiency, the development need that meets following intelligent grid, can thoroughly solve the problem of seamless communication between Intelligent transformer station and control centre, has extremely important researching value and popularizing application prospect.
For achieving the above object, the invention provides the method that a kind of transformer station Abstract Common Service Interface is mapped to network service, it is characterized in that, described method comprises the steps:
(1). obtain the data that will transmit from ACSI kernel object service unit;
(2). add the data frame head to data, and data are processed and formed packet;
(3). by the tcp link, described data packet transmission is arrived to Ethernet.
In optimal technical scheme provided by the invention, in described step 2, described data frame head comprises: the control code set gradually, service mapping code and Frame length coding.
In the second optimal technical scheme provided by the invention, the length of described data frame head is 4 bytes; Wherein, described control code is 1 byte, and described service mapping code is 1 byte, and described Frame length is encoded to 2 bytes.
In the 3rd optimal technical scheme provided by the invention, described step 2 comprises the steps:
(2-1). the data that obtain are carried out to the window services mapping, for data add the data frame head;
(2-2). data are encoded, obtained data frame content;
(2-3). data frame head and data frame content are assembled into to packet;
In the 4th optimal technical scheme provided by the invention, in described step 2-2, adopt BER (the Basic Encoding Rules) coding rule of ASN.1 to be encoded to data.
In the 5th optimal technical scheme provided by the invention, the length of described packet is 65535 bytes, and the length of data frame content is 65531 bytes.
In the 6th optimal technical scheme provided by the invention, provide a kind of transformer station Abstract Common Service Interface to be mapped to the system of network service, it comprises: the Ethernet of ACSI kernel object service unit and its data of reception; Its improvements are, described device comprises: the data of described ACSI kernel object service unit are processed and the data packet transmission formed is processed to transmission unit to the data of described Ethernet.
In the 7th optimal technical scheme provided by the invention, described data are processed transmission unit, comprising: window services mapping block, coding module and packet assembling module; Described packet assembling module receives respectively the data of described window services mapping block and described coding module.
In the 8th optimal technical scheme provided by the invention, described window services mapping block, carry out the window services mapping to the data that obtain, for data add the data frame head.
In the 9th optimal technical scheme provided by the invention, described coding module, BER (the Basic Encoding Rules) coding rule of employing ASN.1, encoded to data, obtains data frame content.
In the tenth optimal technical scheme provided by the invention, described packet assembling module, be assembled into packet by data frame head and data frame content, and the data packet transmission formed arrived to described Ethernet.
Compared with the prior art, a kind of transformer station provided by the invention Abstract Common Service Interface is mapped to the method and system of network service, can shine upon whole Abstract Common Service Interfaces, by the Frame of simplifying, definition and TCP/IP mapping mode are described, higher communication efficiency is provided, the development need that meets following intelligent grid, can solve the bottleneck of seamless communication between Intelligent transformer station and control centre; And, by a set of interface definition mapping ruler is set, the information exchange model of transformer station and Abstract Common Service Interface are all encoded, can support whole interfaces of IEC61850 stipulations definition, realize sending on transformer station's telemechanical and protection information complete, pass through the IEC61850 index plane to equipment modeling and information self-described function simultaneously, can be expanded the information exchange model content dynamically, reduce workload and the complexity of system operation maintenance; Moreover this method has designed a kind of data frame head form of simplifying, can carry out complete description to the information of notebook data frame with the length of 4 bytes, the data length after coding, lower than the processing modes of other stipulations mapping in the past, has reduced invalid data content.Aspect Internet Transmission, adopted after the coding mode of TCP/IP of directly shining upon, reduced the transmission delay of network protocol stack, improved efficiency of transmission.
The accompanying drawing explanation
Fig. 1 is the method flow diagram that transformer station's Abstract Common Service Interface is mapped to network service.
Fig. 2 is the system overview figure that transformer station's Abstract Common Service Interface is mapped to network service.
Fig. 3 is the structure chart that in system, data are processed transmission unit.
Fig. 4 is the structural representation that transformer station's Abstract Common Service Interface is mapped to the system of network service.
The TCP frame assumption diagram that Fig. 5 is used for transmission.
Embodiment
As shown in Fig. 1,4, a kind of transformer station Abstract Common Service Interface is mapped to the method for network communication protocol stack, a kind of tcp data frame format of simplifying and a set of interface definition mapping ruler are set, the definition of the Abstract Common Service Interface of transformer station is carried out to mapping code, information exchange model is carried out to data encoding, create the data frame head with 1 byte control code, 1 byte service mapping code and 2 byte data frame lengths according to data frame format afterwards, the packet that data frame head and coded data are assembled into maps directly to the ICP/IP protocol stack and carries out transfer of data.
Transformer station's Abstract Common Service Interface is mapped to the method for network communication protocol stack, and the kernel object Service interface definition of the information exchange model of transformer station and Abstract Common Service Interface meets the standard of IEC61850 substation communication network and system.
Transformer station's Abstract Common Service Interface is mapped to the method for network communication protocol stack, method user must use identical Code And Decode form, can but be not limited in BER (the Basic Encoding Rules) coding rule adopted as ASN.1 and carry out the object data coding.
Be mapped to the method for network communication protocol stack according to transformer station's Abstract Common Service Interface, the process that concrete service interface is mapped to network communication protocol stack is after the object data definition of using in information exchange model, by the specific coded format generated data content frame of being encoded;
Create the data frame head with 1 byte control code, 1 byte service mapping code and 2 byte data frame lengths according to data frame format, frame head length is 4 bytes.
After data frame head and data frame content are assembled into to packet, the link provided by ICP/IP protocol and transmission mechanism directly carry out transfer of data.
Transformer station's Abstract Common Service Interface is mapped to the method for network communication protocol stack, it is characterized in that: the object data definition of using in information exchange model meets the series standard of IEC61850 substation communication network and system.
Transformer station's Abstract Common Service Interface is mapped to the method for network communication protocol stack, and whole packet is the longest may be 65535 bytes, and wherein the Frame frame head is 4 bytes, and Frame length is 65531 bytes to the maximum, and syllable sequence is first high rear low.
Transformer station's Abstract Common Service Interface is mapped to the method for network communication protocol stack, and packet is transmitted by link and the transmission mechanism that uses ICP/IP protocol to provide.
As shown in Figure 1, a kind of transformer station Abstract Common Service Interface is mapped to the method for network service, and described method comprises the steps:
(1). obtain the data that will transmit from ACSI kernel object service unit;
(2). add the data frame head to data, and data are processed and formed packet;
(3). by the tcp link, described data packet transmission is arrived to Ethernet.
As shown in Figures 2 to 4, a kind of transformer station Abstract Common Service Interface is mapped to the system of network service, and it comprises: the Ethernet of ACSI kernel object service unit and its data of reception; Described device comprises: the data of described ACSI kernel object service unit are processed and the data packet transmission formed is processed to transmission unit to the data of described Ethernet.
Described data are processed transmission unit, comprising: window services mapping block, coding module and packet assembling module; Described packet assembling module receives respectively the data of described window services mapping block and described coding module.
Described window services mapping block, carry out the window services mapping to the data that obtain, for data add the data frame head.
Described coding module, BER (the Basic Encoding Rules) coding rule of employing ASN.1, encoded to data, obtains data frame content.
Described packet assembling module, be assembled into packet by data frame head and data frame content, and the data packet transmission formed arrived to described Ethernet.
Need statement, content of the present invention and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as limiting the scope of the present invention.Those skilled in the art inspired by the spirit and principles of the present invention, can do various modifications, be equal to and replace or improve.But in the protection range that these changes or modification are all awaited the reply in application.
Claims (11)
1. transformer station's Abstract Common Service Interface is mapped to the method for network service, it is characterized in that, described method comprises the steps:
(1). obtain the data that will transmit from ACSI kernel object service unit;
(2). add the data frame head to data, and data are processed and formed packet;
(3). by the tcp link, described data packet transmission is arrived to Ethernet.
2. method according to claim 1, is characterized in that, in described step 2, described data frame head comprises: the control code set gradually, service mapping code and Frame length coding.
3. method according to claim 2, is characterized in that, the length of described data frame head is 4 bytes; Wherein, described control code is 1 byte, and described service mapping code is 1 byte, and described Frame length is encoded to 2 bytes.
4. method according to claim 1, is characterized in that, described step 2 comprises the steps:
(2-1). the data that obtain are carried out to the window services mapping, for data add the data frame head;
(2-2). data are encoded, obtained data frame content;
(2-3). data frame head and data frame content are assembled into to packet.
5. method according to claim 1, is characterized in that, in described step 2-2, adopts BER (the Basic Encoding Rules) coding rule of ASN.1 to be encoded to data.
6. method according to claim 1, is characterized in that, the length of described packet is 65535 bytes, and the length of data frame content is 65531 bytes.
7. transformer station's Abstract Common Service Interface is mapped to the system of network service, and it comprises: ACSI kernel object service unit and receive the Ethernet of its data; It is characterized in that, described device comprises: the data of described ACSI kernel object service unit are processed and the data packet transmission formed is processed to transmission unit to the data of described Ethernet.
8. system according to claim 7, is characterized in that, described data are processed transmission unit, comprising: window services mapping block, coding module and packet assembling module; Described packet assembling module receives respectively the data of described window services mapping block and described coding module.
9. system according to claim 8, is characterized in that, described window services mapping block carries out the window services mapping to the data that obtain, for data add the data frame head.
10. system according to claim 8, is characterized in that, described coding module, and BER (the Basic Encoding Rules) coding rule of employing ASN.1, encoded to data, obtains data frame content.
11. system according to claim 8, is characterized in that, described packet assembling module, be assembled into packet by data frame head and data frame content, and the data packet transmission formed arrived to described Ethernet.
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| CN103763402A (en) * | 2013-06-09 | 2014-04-30 | 国网辽宁省电力有限公司大连供电公司 | NAT device specially used for telecontrol 104 protocol |
| CN111162520A (en) * | 2019-12-27 | 2020-05-15 | 中国电力科学研究院有限公司 | Power grid mapping method and system |
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| US20020136225A1 (en) * | 2001-01-26 | 2002-09-26 | Joy Joseph M. | Method and apparatus for emulating ethernet functionality over a serial bus |
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| CN103763402A (en) * | 2013-06-09 | 2014-04-30 | 国网辽宁省电力有限公司大连供电公司 | NAT device specially used for telecontrol 104 protocol |
| CN111162520A (en) * | 2019-12-27 | 2020-05-15 | 中国电力科学研究院有限公司 | Power grid mapping method and system |
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