CN108445857A - A kind of 1+N redundancy scheme design methods of SCADA system - Google Patents
A kind of 1+N redundancy scheme design methods of SCADA system Download PDFInfo
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- CN108445857A CN108445857A CN201810419413.1A CN201810419413A CN108445857A CN 108445857 A CN108445857 A CN 108445857A CN 201810419413 A CN201810419413 A CN 201810419413A CN 108445857 A CN108445857 A CN 108445857A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a kind of 1+N redundancy scheme design methods of SCADA system, when after multiple servers delay machine simply by the presence of the enough server normal operations in a Taiwan investment source, remain able to the offer service of continuous-stable, ensure that the reliability of system.There are one " server operation lists " for each service process object of the present invention, after the startup of each server system, each service process object can check oneself " server operation list " configuration item, if current machine title is in configuration item, the process will start, and report this process to the real time database management process of the machine simultaneously；The real time database management process of the machine judges that can the process as the executor of the task by arbitration；The managing process POMS Master of every SCADA server determine which platform machine runs corresponding process, and the execution of process is dispatched between other servers after certain server operation failure in process.
Description
Technical field
The present invention relates to each professional skill fields that SCADA distributed platforms are applied, and cover power monitoring, water conservancy prison
The automatic industrials such as control, oil gas chemical industry, rail traffic, coal mine control industry.
Background technology
SCADA(Supervisory Control And Data Acquisition:SCADA) acquisition of system, that is, data with
Supervisor control is the industrial automation control system for integrating the technologies such as computer, network, communication, sensing, can be extensive
The numerous areas such as data acquisition and monitoring control applied to industries such as electric power, water conservancy, oil, chemical industry, rail traffics.SCADA
System can collection site data in real time, to industry spot carry out locally or remotely control, to technological process carry out comprehensively, it is real
When monitor, provide necessary data for production scheduling and management, and can thereby use Dynamic matrix control discuss algorithm provide it is further
Assistant analysis and Production Scheduling Decision.
In order to ensure that the operation of SCADA system continuous effective, functional reliability and stability are required for giving special
Consider.In general, SCADA system can use multi-level redundancy from software, hardware, network communication link etc.
To reach higher availability and reliability.Especially server used by SCADA system, as critical component, thereon not
Only operation has real time database service, also provides various service processes, therefore SCADA servers generally use redundant mode.
SCADA system platform uses the method for operation of layered distribution type, and any one of system application process can
Configuration is distributed operation in different one or more node machines as needed, and all processes all have the more redundancy features of 1+N,
The technology can greatly lifting system fault-tolerant ability.
All application services not only have there are one the process being currently running, and can also complete the standby of said function
Process stand-by heat is on N number of other nodes, if currently there is Single Point of Faliure in the machine of operation process, other nodes it is spare into
The service that journey can be undertaken according to the rapid taking over fault node of limited policy of election algorithm or configuration, under extreme case, if also
There are the nodes that one can normally provide service, then will all run (performance permission feelings on this node in last all services
Under condition).The invention will be described the realization principle of SCADA system platform 1+N redundancy fault-tolerant mechanism.
Invention content
For problems of the prior art, the purpose of the present invention is design a kind of 1+N redundancy schemes of SCADA system
Design method remains able to when after multiple servers delay machine simply by the presence of the enough server normal operations in a Taiwan investment source
The offer service of continuous-stable, ensure that the reliability of system.
In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is：A kind of 1+N redundancy machines of SCADA system
Design method processed, it is characterised in that：
It is answered Step 1: each service process object is used to store the service there are " server operation list " configuration item
Which server this operates on, configures the server before list and possesses perform claim more preferably；Only " server is run
The title of server is configured in list ", which could run on that server, otherwise will not transport on that server
Row；
Step 2: every SCADA server, there are one real-time data base, the real-time data base between each server is same in real time
Step and a real time database management process are responsible for the real-time data base；It is each to take after the startup of each server system
Business process object can check oneself " server operation list " configuration item, if current machine title in configuration item, should be into
Journey will start, and report that this process is available to the real time database management process of the machine simultaneously, and be filled up to real-time number
According in the real-time property " candidate list " of the library service process object；
Step 3: the real time database management process of the machine judges that the process can holding as the task by arbitration
Passerby, and be filled up in the real-time property " executor's list " of the real-time data base service process object；Real time database management
Process realizes that process is dead by checking the candidate member in candidate list and judging whether candidate member runs on machine
Detection；If there are one candidate members, real time database management process periodically to lead to candidate member process on machine
Letter, if using not meeting with a response before next communication cycle, the machine real-time data base thinks that candidate member applies journey
Sequence is dead；
Step 4: the managing process for being responsible for carrying out fault-tolerant arbitration there is also one in the real-time database of every SCADA server
POMS Master, it determines which platform machine runs corresponding process, and in process after certain server operation failure, at it
The execution of process is dispatched between its server；Managing process POMS Master operate in net by monitoring communication packet to determine
The computer of the task on network whether there is failure；
If managing process POMS Master do not receive synchronizing information from the server within the predetermined time
Packet, or synchronizing information packet is received from asynchronous machine, managing process POMS Master are set to the server asynchronous；Such as
Fruit receives the synchronizing information packet in the scheduled time, and confirms the server sync, managing process POMS Master will be responsible for from
One of practical executor as the task is selected in " the executor's list " of each process.
Beneficial effects of the present invention
As the core mechanism in comprehensive monitoring system software platform, the 1+N redundancy schemes designed by the present invention can be protected
Demonstrate,prove that systems stay is stable, reliable operation, the mechanism obtained in large scale system using with verification, successfully answer at present
For in a plurality of urban track traffic comprehensive monitoring system such as Line of Nanjing Subway, Shenyang Metro, Wuhan subway, Huaian tramcar,
And it is highly commended by customers deeply.
The complexity of SCADA system itself determines the complexity of redundancy, the 1+N redundancy machines designed by the present invention
System when after multiple servers delay machine simply by the presence of the enough server normal operations in a Taiwan investment source, remains able to continuous steady
Fixed offer service, ensure that the reliability of system, largely reduce because the system failure bring it is uncertain because
Element simultaneously saves maintenance cost.
Description of the drawings
Fig. 1 is the process configured list figure of the embodiment of the present invention.
Fig. 2 is the implementation steps flow chart of the 1+N redundancies of the embodiment of the present invention.
Fig. 3 is three server sync normal operation schematic diagrames of the embodiment of the present invention.
Fig. 4 is handoff procedure (scada1 breaks down) schematic diagram of the 1+N redundancies of the embodiment of the present invention.
Fig. 5 is handoff procedure (scada1, scada3 break down) schematic diagram of the 1+N redundancies of the embodiment of the present invention.
Fig. 6 is that (scada1 is extensive after scada1, scada3 break down for the handoff procedure of 1+N redundancies of the embodiment of the present invention
It is multiple) schematic diagram.
Specific implementation mode
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Assuming that 1：All function services for completing a SCADA system have 5, i.e. history data store process, data are adopted
Collection process, program-controlled managing process, calculates service processes at alarm process.
Assuming that 2：There are 3 SCADA servers on the LAN of current control centre, be named as scada1, scada2 respectively,
Scada3, as shown in Figure 1：The process configured list figure of the present embodiment.
Which platform machine is the expression current service of band " italic underscore " preferentially operate in Fig. 1；It is other without " italic
The task is in hot standby state of activation on the expression machine of underscore ".
The 1+N redundancy scheme design processes of SCADA system are as follows：
(1) user configuration
There are " server operation list (PreferredList) " configuration items for storing for each service process object
Which server the service should operate on, and simplest algorithm is disposed on the server before list and possesses holding more preferably
Row right.The title of server is only configured in " server operation list (PreferredList) ", which is likely to
It runs on the server, otherwise will not run on that server.
The PreferredList configurations of each process are as shown in table 1 below in Fig. 1.
PreferredList, ResumeMode allocation list of 1 each process of table
| Service processes | PreferredList is configured | ResumeMode |
| History data store process | 'scada1,scada3,scada2' | Automatic |
| Data acquire process | 'scada2,scada1,scada3' | Automatic |
| Alarm process | 'scada2,scada3,scada1' | Automatic |
| Program-controlled managing process | 'scada3,scada2,scada1' | Automatic |
| Calculate service processes | 'scada3,scada1,scada2' | Automatic |
ResumeMode configuration items in table 1 show whether the service (Automatic) can be adjusted to preferred service automatically
It is run on device, can be configured to Automatic, Manual.By taking history data store process as an example, scada1 machines are preferentially operated in
On device, scada2, scada3 are preferentially taken over after the process failure on scada1 by the process on scada2 as spare,
The process on scada2 is taken over after also failing by the process on scada3, if scada1 systems restore normal at this time, and
The ResumeMode attribute configurations of history data store process are Automatic, then it can switch to scada1 and continue to run with；Such as
Fruit is configured to Manual and is then still stored on scada3 and runs, and other processes are similarly.
(2) whether can be used to the report of the machine real-time data base
Every SCADA server there are one real-time data base (the real-time data base real-time synchronization between each server), with
And a real time database management process is responsible for the real-time data base.
After the startup of each server system, each service process object can check that " server runs list for oneself
(PreferredList) " configuration item, if current machine title, in configuration item, which will start, and simultaneously to the machine
Real time database management process report that this process is available, and be filled up to the real-time of the real-time data base service process object
In attribute " candidate list (CandidateList) ".As shown in the step 2 in Fig. 2.
Fig. 2 is the implementation steps flow chart of the 1+N redundancies of the embodiment of the present invention.
(3) the machine real time database management process judges whether this task can be used
The real time database management process of the machine by arbitration, judge the process can as the executor of the task, and
It is filled up in the real-time property " executor's list (ReadyList) " of the real-time data base service process object.Such as the step in Fig. 2
Shown in rapid 3, specific arbitrated procedure is as follows：
Whether real time database management process is by checking the candidate member in candidate list and judging candidate member in machine
It is run on device to realize that process death detects.If there are one candidate member on machine, real time database management process is regular
Member process communicates with the candidate, does not meet with a response if applied before next communication cycle, the machine real time data
Think that the candidate member application is dead and executes following steps in library：
● this candidate member's machine object is removed in list from rear select of real-time data base
● cancel the message informing of all processes
● delete the buffered message informing of all processes
● kill is active but abnormal process, restarts process by process manager
● if this task process, which can confirm rapidly, this time to be communicated, and real time database management process is using it as current clothes
The possibility supplier of business preserves, and is filled into real-time property " executor's list of the service process object
(ReadyList) " in, as shown in step 3 in Fig. 2.
(4) the current executor of task is selected from step 3
The managing process POMS for being responsible for carrying out fault-tolerant arbitration there is also one in the real-time database of every SCADA server
Master, it determines which platform machine runs corresponding process, and in process after certain server operation failure, in other services
The execution of process is dispatched between device.The managing process determines the calculating for operating in the task on network by monitoring communication packet
Machine whether there is failure.
If POMS Master do not receive synchronizing information packet from the server within the predetermined time, or from non-
Synchronizing information packet is received on synchronous machine, POMS master are set to the server asynchronous.If received in the scheduled time
The synchronizing information packet, and confirm that the server sync, POMS managers will be responsible for all " executors from each process of step 4
One of practical executor as the task is selected in list (ReadyList) ".It is arranged in step 1 by user
It is sequentially preceding, by preferentially as the execution of the task, and it is filled up to the real-time of the real-time data base service process object
In attribute " current executor (CurrentLink) ".As shown in the step 4 of Fig. 2.
(5) data are handled
When some value of system real-time database changes, and corresponding process is required to be handled, just will produce
The real-time data base of one message informing information, every server buffers the message informing information first, and then POMS hosts are examined
The Communications service process for handling the message is looked into real-time data base currently in any platform machine operation, the only Communications service of the machine
Process can just handle the message informing and be confirmed, and the broadcast of message authentication information is sent to all synchronous machines on network,
Then other all machines remove the message informing of the confirmation from their buffering list, and without the place of any data
Reason.
Server step-out or dead electricity where activating some process (such as interprocess communication) of operation etc., POMS can be incited somebody to action
The CurrentLink attributes of the fault tolerant object are assigned to another again can run the machine of the process, and service processes place is new
The failure tolerant notification information of all buffering waitings will be sent to the service processes by the real time database management process of server, so
The service processes handle and confirm the fault-tolerant notice of these buffering waitings afterwards.
From the above mentioned, the data acquisition process of Fig. 1 just operates on scada2, if scada2 network interruptions at this time, POMS
Master is first considered that the machine step-out, then by " the current executor of the real-time data base task object
(CurrentLink) " real-time property empties, and the selection from " executor's list (ReadyList) " of the task object
Scada1 as current connection, and the data of scada1 acquisition process obtain oneself be current task executor, will take over
The task of scada2.If scada1 servers also go wrong or network interruption, scada3 by the executor as current task,
To the 1+N redundancy communication mechanism for the process realized.Similarly for history data store process, program-controlled managing process, calculate clothes
Business process is also such.
Lower Fig. 3~6 demonstrate the case where 1+N redundancy process switchings.
Fig. 3 is three server sync normal operation schematic diagrames of the present embodiment.
1) history data store process is taken over by scada1, remaining process is in stand-by state." italic underscore " indicates
The process being currently running is (such asHistory data store process), (such as data acquire other processes indicated in stand-by state
Process).Data acquisition process, alarm process operate on scada2, and program-controlled managing process, calculating service processes operate in
On scada3, as shown in Figure 3；
2) process run in scada1 originally after server scada1 breaks down will be by " server runs list
(PreferredList) " configuration sequence switches over (as shown in table 1), i.e. history data store process is by server
Scada3 takes over, and other processes are constant, as shown in Figure 4：The handoff procedure of the 1+N redundancies of the present embodiment (scada1 breaks down)
Schematic diagram；
3) program-controlled managing process, calculating service processes will be taken over by scada2 after scada3 also goes wrong, i.e., all
Service processes are all provided by scada2, even if the only remaining 1/N of server resource, system remain able to continual and steady fortune at this time
Row, as shown in Figure 5：Handoff procedure (scada1, scada3 break down) schematic diagram of the 1+N redundancies of the present embodiment；
4) if scada1 systems are restored at this time, and scada3 systems are not restored, then history data store process is because of it
ResumeMode attribute configurations are Automatic, so it changes and is switched to scada1 and continues to run with；Service processes are calculated because of it
ResumeMode attribute configurations are Automatic, and scada1 is better than scada2 in PreferredList configurations, so
Scada1 operations can be switched to, and program-controlled managing process is then still maintained on scada2 and runs, as shown in Figure 6.If at this time
Scada3 systems are also restored normally, then program-controlled managing process, calculating service processes finally can also be switched in scada3 systems and be transported
Row, as shown in Figure 6：The handoff procedure (scada1 restores after scada1, scada3 break down) of the 1+N redundancies of the present embodiment shows
It is intended to.
Above embodiment is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, all
It is according to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within right of the present invention and wants
It asks within the protection domain of book.The technology that the present invention is not directed to can be realized by existing technology.
Claims (6)
1. a kind of 1+N redundancy scheme design methods of SCADA system, it is characterised in that：
It should be transported Step 1: each service process object is used to store the service there are " server operation list " configuration item
Row configures the server before list and possesses perform claim more preferably on which server；Only " server operation row
The title of server is configured in table ", which could run on that server, otherwise will not run on that server；
Step 2: after the startup of each server system, each service process object can be checked oneself " server operation list "
Configuration item, if current machine title, in configuration item, which will start, and simultaneously to the real time database management of the machine
Process reports that this process is available, and is filled up to the real-time property " candidate list " of the real-time data base service process object
In；
Step 3: the machine real time database management process by arbitration, judge the process can as the executor of the task,
And it is filled up in the real-time property " executor's list " of the real-time data base service process object；Real time database management process is logical
Cross check candidate list in candidate member and judge candidate member whether on machine run realize process death detection；Such as
There are one candidate members, real time database management process periodically to be communicated with candidate member process on machine for fruit, if
Using not meeting with a response before next communication cycle, the machine real-time data base thinks that the candidate member application is dead
It dies；
Step 4: the managing process POMS for being responsible for carrying out fault-tolerant arbitration there is also one in the real-time database of every SCADA server
Master, it determines which platform machine runs corresponding process, and in process after certain server operation failure, in other services
The execution of process is dispatched between device；Managing process POMS Master are operated in determine on network by monitoring communication packet
The computer of the task whether there is failure.
2. the 1+N redundancy scheme design methods of SCADA system according to claim 1, which is characterized in that in step 2：
Every SCADA server is there are one real-time data base, and real-time data base real-time synchronization between each server and one are in real time
Data base administration process is responsible for the real-time data base.
3. the 1+N redundancy scheme design methods of SCADA system according to claim 1, which is characterized in that in step 4：
If managing process POMS Master do not receive synchronizing information packet from the server within the predetermined time, or from non-
Synchronizing information packet is received on synchronous machine, managing process POMS Master are set to the server asynchronous；If when scheduled
It is interior to receive the synchronizing information packet, and confirm the server sync, managing process POMS Master will be responsible for from each process
One of practical executor as the task is selected in " executor's list ".
4. the 1+N redundancy scheme design methods of SCADA system according to claim 3, which is characterized in that in step 4：
The sequence arranged in " server operation list " is preceding, by preferentially as the execution of the task, and is filled up in real time
In the real-time property " current executor " of the database service process object.
5. the 1+N redundancy scheme design methods of the SCADA system according to one of Claims 1-4, it is characterised in that：
When some value of system real-time database changes, and corresponding process is required to be handled, one just will produce
The real-time data base of message informing information, every server buffers the message informing information first, and then POMS hosts check real
When database in handle the Communications service process of the message and currently run in any platform machine, the only Communications service process of the machine
The message informing can just be handled and confirmed, and the broadcast of message authentication information is sent to all synchronous machines on network, then
Other all machines remove the message informing of the confirmation from their buffering list, and without the processing of any data.
6. the 1+N redundancy scheme design methods of the SCADA system according to one of claim 1 to 5, it is characterised in that：
Server step-out or dead electricity where activating some process (such as interprocess communication) of operation etc., POMS can be by the appearances
The CurrentLink attributes of wrong object are assigned to another again can run the machine of the process, new demand servicing where service processes
The failure tolerant notification information of all buffering waitings will be sent to the service processes by the real time database management process of device, then should
Service processes handle and confirm the fault-tolerant notice of these buffering waitings.
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| CN109597723B (en) * | 2018-11-26 | 2022-01-28 | 南京轨道交通系统工程有限公司 | Dual-machine hot standby redundancy implementation system and method for subway integrated monitoring system |
| CN115374215A (en) * | 2022-07-27 | 2022-11-22 | 深圳润世华研发科技有限公司 | Multi-machine configuration data management and double-front-end-processor hot standby method in industrial monitoring |
| CN115374215B (en) * | 2022-07-27 | 2023-06-30 | 深圳润世华研发科技有限公司 | Method for managing multi-machine configuration data and hot standby of double front-end processors in industrial monitoring |
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