CN104333540B - A kind of substation automation system communication protocol dynamic implementation method - Google Patents
A kind of substation automation system communication protocol dynamic implementation method Download PDFInfo
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Abstract
The invention discloses a kind of substation automation system communication protocol dynamic implementation method, text description including analyzing communication protocol, convert thereof into finite state machine, finite state machine finite state collection, event input set, processing behavior aggregate, the mapping function collection of status change and the part of original state 5 composition；Finite state collection, event input set, processing behavior aggregate are expressed with basic format respectively, the basic format is：" keyword=description character string "；Mapping function collection is write, including sequentially write from left to right：Current state, receive incoming message, perform operation operation and current state conversion results；Unified definition is carried out to the keyword in script；Grammer in script is described collectively.Finite state machine is applied in communication protocol modeling by the present invention, realizes framework by one communication protocol of construction, realizes the configuration of communication protocol.
Description
Technical field
The present invention relates to a kind of substation automation system communication protocol dynamic implementation method, belong to communication technical field.
Background technology
Communication protocol species is various in current domestic electric substation automation system, the existing mark formulated by each standardization body
Quasi- communication protocol, such as IEC60870 series, MODBUS, DNP, CDT etc., also there is the customized nonstandard agreement of each equipment manufacturer.But
Even widely used IEC60870 series of standard protocols, its 4 kinds of planning standards：IEC60870-5-101、IEC60870-5-
102nd, IEC60870-5-103, IEC60870-5-104, longer due to formulating the cycle, option is more in agreement, and each department make
Different with the understanding of unit, each device manufacturer to agreement, all there are many child releases in 4 kinds of planning standards.
Transformer substation communication supervisor as substation data center, it is necessary to from each smart machine in station and different scheduling stations
Communication, due to the diversity of agreement and the invisibility of communication processor internal agreement processing procedure, usual communication interface debugging
Need of work takes more debug time.Simultaneously, communication processor needs to safeguard the protocol library of an enormous amount, to agreement
Any modification be required for changing the program of communication processor, also increase the difficulty of the version management of communication processor producer.
At present, the Finite State Machine in computer science is generally used for the dynamic behavior modeling to system, leads to
Cross with state diagram come visable representation, be the strong tools to reaction equation system modelling.In the past 20 years, finite state machine and state
The formalization mechanism of figure has obtained many researchs, effectively supports the modeling of various complex behaviors.
The content of the invention
It is an object of the invention to provide a kind of automation of transformation substations based on finite state machine and custom script language
System communication protocol dynamic realizing method, finite state machine is applied in communication protocol modeling, passes through one communication protocols of construction
View realizes framework, realizes the configuration of communication protocol.
To reach above-mentioned purpose, the technical solution adopted in the present invention is：A kind of substation automation system communication agreement
Dynamic realizing method, comprise the following steps：
Step 1：Analyze the text description of communication protocol, convert thereof into finite state machine, finite state machine by：For
Description sends the finite state collection of message, for describing to receive the event input set of message, the processing for representing processing behavior
Behavior aggregate, the mapping function collection for representing the status change between finite state machine and the part of original state 5 composition；
Step 2：Finite state collection, event input set, processing behavior aggregate are expressed with basic format respectively, it is described basic
Form is：" keyword=description character string "；
Step 3：Mapping function collection is write, including sequentially write from left to right：Current state, receive incoming message, hold
Row operation operation and current state conversion results；
Step 4：Unified definition is carried out to the keyword in script, including：Finite state machine keyword definition, hair
Send and receive expression formula keyword definition, processing expression formula keyword definition and calculation expression keyword definition；
Step 5：Grammer in script is described collectively, including：Finite state collection grammer explanation, event are defeated
Enter to collect grammer explanation, processing behavior aggregate grammer explanation and mapping function collection grammer explanation.
Further, the finite state collection is all transmission orders extracted from communication protocol.
Further, the event input set is all reception orders extracted from communication protocol.
Further, the description character string is immediate.
Further, the description character string is calculation expression.
Further, the description character string is made up of multiple substrings, and each substring form is " keyword：Calculation expression
Formula ".
Compared with prior art, the beneficial effect that is reached of the present invention is：
(1) a kind of substation automation system communication agreement based on finite state machine and custom script language is provided
Dynamic realizing method, either client or service end agreement, also no matter agreement is balanced type or unbalanced, and transformer station leads to
Believe that supervisor all can use same communication module and custom script language to realize, realize the configuration of communication protocol；
(2) invention defines a kind of script to describe communication protocol, limited by the programming Control to script
The operation of state machine processor, different communication protocol correspond to different shell scripts, identical communication protocol shell script
Identical, an abundant shell script storehouse can be formed by accumulating over a long period, and facilitate onsite application；
(3) finite state collection, event input set, processing behavior aggregate use unified basic format：" keyword=description
Character string ", these three expression formula uniform formats, is easy to learn and use；
(4) customized script has autgmentability, convenient Function Extension later.
Brief description of the drawings
Fig. 1 is the inquiry/response communication protocol processes flow chart using the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
Step 1：The text description of communication protocol is analyzed, converts thereof into finite state machine.
Finite state machine is made up of following 5 part：
Finite state collection：It is all transmission orders extracted from communication protocol, for describing to send message, Ke Yiyong
[STATE_x] represent finite state collection code, wherein, x for numeral, each finite state collection by transmission message coding packet
Formed with message name send_type is sent, send message coding packet as that there must be item.
Event input set：It is all reception orders extracted from communication protocol, for describing to receive message, with
[INPUT_x] is represented, each event input set is made up of reception message coding packet and reception message name rece_type,
Wherein packet is must have item.
Handle behavior aggregate：According to current state [STATE_x] and current input [INPUT_x], write according to communication protocol
[OUTPUT_x], for representing corresponding processing behavior.
Mapping function collection：According to current state [STATE_x] and current input [INPUT_x], write according to communication protocol
[TRANSLATE_x], for representing the status change between finite state machine.
Original state：The original state of finite state machine is represented, is defaulted as [STATE_1].
Step 2：Finite state collection, event input set, processing behavior aggregate are expressed with basic format respectively, basic format
For：" keyword=description character string ".
Each finite state collection, event input set, processing behavior aggregate are made up of several expression items, each express Xiang Zuo
Side is keyword, and right side is description character string.Keyword includes packet, send_type, test_input/test_input
Items such as [x], description character string can be multiple substrings, and each substring form is " keyword：Calculation expression ", each substring
Can be immediate or calculation expression, each byte in substring is with CSV.
" 0xeb, 0x90,0xeb, 0x90,0xeb, 0x90, Addr, 0x00,0x00, the SUM [6 such as packet=:8] ", table
It is immediate to show that the state sends 10 bytes, 0x5a etc., SUM [6:8] calculation expression, represent to take the tired of the 6th to the 8th byte
Add and check code.
For processing behavior aggregate, keyword represents process object in basic format, describes string representation pending data.
It is exemplified below：
Such as：Yc4=" (byte10*256+byte9)/100 ", represents the value of right side calculation expression inserting telemetry
The 4th point of storehouse.
Such as：Soe21=" state:Byte9==2, year:byte15,month:byte16,day:byte17,hour:
byte18,min:byte19,second:Byte20 ", represent this be No. 21 point in remote signalling storehouse SOE information, description character string by
Multiple substring compositions, describe every content of SOE information.Substring expression " state:Byte9==2 ", left side state tables
Showing the state of SOE information, right side is calculation expression, represents SOE state values, when the 9th byte of reception is 2, SOE states
It is worth for 1, other are 0.Substring expression " year:Byte15 ", left side year represent the year of SOE information, and right side is calculating
Expression formula, represent time value.Remaining substring expression represents the moon of SOE information, day, hour, minute, second respectively.
Such as gps=" year:asc(byte12)*1000+asc(byte13)*100+asc(byte14)*10+asc
(byte15),month:asc(byte11)*10+asc(byte10),day:asc(byte9*0x100+byte8),hour:asc
(byte3)*10+asc(byte2),min:asc(byte5)*10+asc(byte4),second:asc(byte7)*10+asc
(byte6) information when this is GPS pairs ", is represented, description character string is made up of multiple substrings, in items when describing GPS pairs
Hold.Substring " year:Asc (byte12) * 1000+asc (byte13) * 100+asc (byte14) * 10+asc (byte15) ", it is left
Side year represents year at GPS pairs, and right side is calculation expression, represents time value, and wherein asc () function representation will connect
The byte data of receipts is converted into binary data by ASCII character.
Step 3：Mapping function collection is write, including sequentially write from left to right：Current state, receive incoming message, hold
Row operation operation and current state conversion results.
Such as：Mapping function is：STATE_1--->INPUT_2--->OUTPUT_2--->STATE_2, then it represents that current shape
When state is in STATE_1, if reception incoming message is INPUT_2, arithmetic operation OUTPUT_2 is performed, and current state is turned
It is changed to STATE_2.
Step 4：Unified definition is carried out to the keyword in script, including：Finite state machine keyword definition, hair
Send and receive expression formula keyword definition, processing expression formula keyword definition and calculation expression keyword definition.Such as table 1-5 institutes
Show, be each several part keyword definition table of comparisons, table 6 is the operator and function supported in calculation expression.
Table 1：The finite state machine keyword definition table of comparisons
Table 2：Send and receive the expression formula keyword definition table of comparisons
Table 3：Handle the expression formula keyword definition table of comparisons：
Table 4：The calculation expression keyword definition table of comparisons
Table 5：Other keyword definition tables of comparisons
Table 6：The operator and function supported in calculation expression：
Step 5：Grammer in script is described collectively, including：Finite state collection grammer explanation, event are defeated
Enter to collect grammer explanation, processing behavior aggregate grammer explanation and mapping function collection grammer explanation.Grammer if table 7-10 is each several part is said
It is bright.
Table 7：Finite state collection grammer explanation
Table 8：Event input set grammer
Table 9：Handle behavior aggregate grammer
Table 10：Mapping function collection grammer
As shown in figure 1, it is a kind of inquiry/response communication protocol processes flow chart, communication processor is according to [STATE_1] first
Assembling sends message, then waits reception device returned packet [INPUT_1] or [INPUT_2] or [INPUT_3], and according to dress
The different messages for putting return enter alignment processing module, afterwards according to mapping function [TRANSLATE_1] by State Transferring extremely
[STATE_2], send after ACK confirms, due to without receiving and processing module, further according to mapping function [TRANSLATE_2] by shape
State is changed to [STATE_1], completes a communication process.
Below by taking MODBUS agreement kilowatt-hour meter equipment as an example, the configuration file to be communicated with MODBUS agreement kilowatt-hour meters is provided：
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of substation automation system communication protocol dynamic implementation method, it is characterised in that comprise the following steps：
Step 1：Analyze the text description of communication protocol, convert thereof into finite state machine, finite state machine by：For describing
Send the finite state collection of message, the event input set for describing reception message, the processing action for representing processing behavior
Collection, the mapping function collection for representing the status change between finite state machine and the part of original state 5 composition；
Step 2：Finite state collection, event input set, processing behavior aggregate are expressed with basic format respectively, the basic format
For：" keyword=description character string "；
Step 3：Mapping function collection is write, including sequentially write from left to right：Current state, receive incoming message, perform fortune
Row operation and current state conversion results；
Step 4：Unified definition is carried out to the keyword in script, including：Finite state machine keyword definition, transmission connect
Receive expression formula keyword definition, processing expression formula keyword definition and calculation expression keyword definition；
Step 5：Grammer in script is described collectively, including：Finite state collection grammer explanation, event input set
Grammer explanation, processing behavior aggregate grammer explanation and mapping function collection grammer explanation；
The finite state collection is all transmission orders extracted from communication protocol；
The event input set is all reception orders extracted from communication protocol.
2. substation automation system communication protocol dynamic implementation method according to claim 1, it is characterised in that described
Description character string is immediate.
3. substation automation system communication protocol dynamic implementation method according to claim 1, it is characterised in that described
Description character string is calculation expression.
4. substation automation system communication protocol dynamic implementation method according to claim 1, it is characterised in that described
Description character string is made up of multiple substrings, and each substring form is " keyword：Calculation expression ".
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