CN103513962B - Based on the Power SCADA concurrency control method of minicomputer - Google Patents
Based on the Power SCADA concurrency control method of minicomputer Download PDFInfo
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Abstract
The present invention discloses a kind of Power SCADA concurrency control method based on minicomputer, comprising: minicomputer adopts explicit parallel instruction to calculate EPIC framework, uses Unix operating system; Parallel program control card data structure, increases parallel control grouping row, parallel control apportion sequence number row and executive condition row; Main thread controls each parallel control and to divide into groups sub-thread, and sets up timer thread; Sub-thread by running status, operating procedure and waiting status three mode fields and an instruction field with main thread communication; Each sub-thread independence and Power SCADA system communication.The present invention walks abreast while can realizing many electric substations straighforward operation, significantly reduce the daily working strength of stopping power transmission of track traffic electric power yardman, contact net especially for long transmission line stops power transmission, power transmission is stopped successively by each original electric substation, become and carried out stopping power transmission simultaneously, it is obviously that its time efficiency performed improves.<!-- 2 -->
Description
Technical field
The present invention relates to a kind of urban track traffic Power SCADA system (electric power monitoring system), specifically, what relate to is concurrency control method in a kind of urban track traffic Power SCADA system (electric power monitoring system), realizes carrying out straighforward operation to the multiple website of Power SCADA system simultaneously.
Background technology
Compare and other Power SCADA system, track traffic electric power SCADA system requires higher to straighforward operation.Rail line due to station electric substation numerous, circuit vehicle at night stop transport after, interruption maintenance operation is very frequent.Switching manipulation involved by power failure is very many again, so provide a set of efficient, safe and stable automatic remote control controlling functions just extremely important.
In order to improve power dispatcher's work efficiency, reducing straighforward operation every day and stopping power transmission working strength, improving the emergency disposal ability of fault, accident, in track traffic electric power SCADA system, be provided with program control function.By the programmed control card made in advance, when needs are fixed step operation, call program control card, and perform corresponding straighforward operation according to the step on card, and present this operation steps adopt the mechanism of sequential control mostly.The mechanism of sequential control is too much owing to relating to station when long transmission line power failure operation, often need long time, and in fact most straighforward operations of these electric substations can be carried out simultaneously when therefore order performs one-pass operation.
At present, program control card often have employed the mode of sequential control or the mode of conventional parallel control, sees accompanying drawing 3.Sequential control refers to according to step pre-specified on card successively order executable operations.Conventional parallel control mode, is the operation steps carrying out parallel control, performs successively in order in the different clock period.These schemes have following problem: the first, sequential control, and for the circuit that circuit is long, the time stopping power transmission is longer; Second, conventional parallel controls, macroscopic view operation is parallel running, but in fact each step operation or order, namely in same timeslice, only have one to control in executable operations, synchronization mechanism is lacked in addition between each parallel work-flow sequence, in order to ensure each grouping sequence sequence energy complete operation simultaneously, need between the adjacent step of same parallel control sequence to increase time delay, after comprehensive, its execution efficiency is higher than sequential control.But for the operation that simple sequence step is many, because each sequence lacks synchronization mechanism, and need to increase time delay, so the execution time is just long.
Through retrieval, do not find the open report of identical with present subject matter or similar document.
Summary of the invention
The object of the invention is to solve above-mentioned deficiency of the prior art, there is provided a kind of in track traffic electric power SCADA system, carry out the implementation method of multi-site parallel control, the method makes each parallel control sequence can non-interfering operation within a clock period, can intercom mutually again when needs Logic judgment.Thus the electric power parallel control function realized truly, improve despatching work efficiency, reduce the accident treatment time.
For realizing above-mentioned object, the Power SCADA concurrency control method based on minicomputer of the present invention, comprises following content:
(1) minicomputer adopts EPIC (explicit parallel instruction calculating) framework, uses Unix operating system;
(2) parallel program control card data structure, increases parallel control grouping row, parallel control apportion sequence number row and executive condition row;
(3) main thread controls each parallel control and to divide into groups sub-thread, and sets up timer thread;
(4) sub-thread by running status, operating procedure and waiting status three mode fields and an instruction field with main thread communication;
(5) each sub-thread independence and Power SCADA system communication.
Described parallel program control card data structure, wherein:
Described parallel control grouping row: the need of the remote control sequence quantity needing executed in parallel when carrying out parallel control and parallel control when this column data represents that current card performs;
Described parallel control apportion sequence number row: if card needs parallel control to run, then the operation steps sequence in each parallel control series is shown in this list;
Described executive condition row: the precondition that this sequence step of each step action need of card completes or the precondition that other parallel control sequences complete are shown in this list, are the keys for carrying out communicating with other parallel control sequence.
Described program control card performs following steps after selecting:
(A1) after program control card is selected to perform, system sets up program control execution main thread, and this thread to divide into groups sub-thread according to the parallel control of setting up with quantity of this card parallel control packet count in parallel control grouping row, sets up a sub-thread of timer simultaneously;
(A2) program control execution main thread creates shared section key, for each parallel control sub-thread that divides into groups distributes three mode fields and an instruction field:
A. running status field, is respectively operation, hangs up, completes, closes;
B. operating procedure field, namely performs which step of this parallel control grouping;
C. waiting status field, comprises stand-by period and the waiting status of book thread;
D. instruction field, notifies sub-thread by program control execution main thread.
(A3) each parallel control divide into groups sub-thread independently with Power SCADA system communication, perform the DEC distant electric control process at corresponding station by sequence of steps, and safeguard the mode field of this thread accordingly.
(A4) order confirmed according to remote control selection, confirmation of returning to school, remote control execution, execution carries out single step DEC distant electric control process, and the execution of each step must in specific time interval.The timing of timer thread notifies that each parallel control is divided into groups sub-thread, by the waiting status field of each sub-thread maintenance itself, if book thread is in waiting status, and the stand-by period exceedes preset value, abandon the step performed immediately, continue to perform next step operation.
(A5) generally speaking, each parallel control sub-thread that divides into groups is independent operating, but the state field value of the sub-thread that also another parallel control can be divided into groups is as the precondition of its a certain step.When there is this kind of situation, by the reading of book thread initiatively timing as the mode field of the sub-thread of precondition, and whether Rule of judgment meets; Sub-thread as precondition does not need to carry out other operations.
(A6) timing of timer thread notifies program control execution main thread, travels through each parallel control to divide into groups the mode field of sub-thread by main thread.When main thread monitors after the sub-thread of all groupings all run or be forced closed, terminate this card and perform.Flow process terminates.
Described each parallel control sub-thread that divides into groups can read the mode field of other sub-threads, but can only safeguard the mode field assigned by book thread; Perform the mode field that main thread can read all sub-threads.Instruction field is safeguarded, as the precondition of the execution step of each sub-thread by performing main thread.
Described parallel control divides into groups sub-thread when breaking down, and processing mode is as follows:
(B1) when a certain sub-thread breaks down, namely during remote control equipment operation failure, book thread maintenance operation mode field, and terminate to perform flow process, out of service;
(B2) when a certain sub-thread execution is to a certain step, and when needing the state field value of another sub-thread as precondition, if as the sub-thread of precondition because of failure stopping, then book Thread Termination performs, out of service.
Described program control card performs by programmed control button, and stop order by outside transmission program, processing mode is as follows:
(C1) after outside transmission program stops order, program control execution main thread is to the instruction field write hard closing instruction of each sub-thread;
(C2) each sub-thread is when performing certain single stepping, and reading command field before remote control selection and remote control perform, if now instruction field is hard closing instruction, then judge book thread execution situation, if current remote control performs and completes, then abandon subsequent operation, out of service; If executed is selected in remote control, and remote control execution not yet performs, then, after transmission remote control is countermanded an order, abandon subsequent operation, out of service;
(C3) program control execution main thread travels through each parallel control and to divide into groups the mode field of sub-thread, and when main thread monitors after the sub-thread of all groupings all run or be forced closed, stop this card and perform, flow process terminates.
Owing to have employed technique scheme, the invention has the beneficial effects as follows: walk abreast can realize many electric substations in electric power monitoring system while straighforward operation, significantly reduce the daily working strength of stopping power transmission of track traffic electric power yardman, contact net especially for long transmission line stops power transmission, power transmission is stopped successively by each original electric substation, become and carried out stopping power transmission simultaneously, it is obviously that its time efficiency performed improves.
For the accident treatment that a certain electric substation exits, by programme controlled parallel control execution mechanism, also can accelerate the accident treatment time, improve the efficiency of emergency disposal, further increase the robotization of electric power monitoring system, intelligent level.
Accompanying drawing explanation
Fig. 1 is thread operational flow diagram one of the present invention;
Fig. 2 is thread operational flow diagram two of the present invention;
Fig. 3 is conventional parallel control flow chart.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the present invention is further explained, but following content is not intended to limit the scope of the invention.
In the present invention, the core concept of parallel control is the parallel running simultaneously of each parallel packet sequence, and be different from conventional parallel and control, hardware structure adopts the optimum framework EPIC supporting parallel processing at present.Explicit parallel instruction calculates (EPIC) pattern and aims at parallel processing efficiently and design, and can process multiple instruction or program simultaneously.Its fundamental design idea is: provide a kind of new mechanism, make full use of hardware and software cooperative ability to improve parallel instructions degree.EPIC framework requires to give full play to the effect of program compiler, finds by can the instruction segment of executed in parallel in the source program that serial semantics is write.To these semantic executed in parallel, the operational efficiency of concurrent program can be substantially increased when CPU processing command.
In order to realize programmed control, the design of program control card is extremely important.In order to realize this concurrency control method, there is a lot of change than card data structure in the past, card data structure main as follows:
1, card is made up of 3 tables, that is: program control sorted table, card grouping sheet and card step table, and the concrete structure of these 3 tables is as shown in following table 1, table 2, table 3.
2, program control card increase data structure has than ever mutually:
The first, the parallel control grouping row in card grouping sheet.The need of the remote control sequence quantity needing executed in parallel when carrying out parallel control and parallel control when this column data represents that current card performs.Such as: " 4 " mark needs executed in parallel 4 remote control sequences." 1 " mark needs execution 1 remote control sequence, is namely traditional sequential control.
The second, increase parallel control apportion sequence number in card step table, if card needs parallel control to run, then the operation steps sequence in each parallel control series is shown in this list.
Three, increase executive condition in card step table, the precondition that this sequence step of each step action need of card completes or the precondition that other parallel control sequences complete are shown in this list, are the keys for carrying out communicating with other parallel control sequence.
The program control sorted table of table 1
| Sequence number | Card kind |
| 1 | 35kV stops power transmission |
| 2 | 1500V stops power transmission |
| 3 | 400V stops power transmission |
| 4 | Stop power transmission completely |
| 5 | Over-zone feeding |
Table 2 card grouping sheet:
Table 3 card step table:
As shown in Figure 1, be thread operational flow diagram one of the present invention, wherein: sub-thread 1 needs using sub-thread 2 as precondition; After selection parallel control card, perform step as follows:
(A1) after program control card is selected to perform, system sets up program control execution main thread, and this thread to divide into groups sub-thread according to the parallel control of setting up with quantity of this card parallel control packet count in parallel control grouping row, sets up a sub-thread of timer simultaneously.
(A2) program control execution main thread creates shared section key, for each parallel control sub-thread that divides into groups distributes three mode fields and an instruction field:
E. running status field, is respectively operation, hangs up, completes, closes;
F. operating procedure field, namely performs which step of this parallel control grouping;
G. waiting status field, comprises stand-by period and the waiting status of book thread;
H. instruction field, notifies sub-thread by program control execution main thread.
Each parallel control sub-thread that divides into groups can read the mode field of other sub-threads, but can only safeguard the mode field assigned by book thread; Perform the mode field that main thread can read all sub-threads.Instruction field is safeguarded, as the precondition of the execution step of each sub-thread by performing main thread.
(A3) each parallel control divide into groups sub-thread independently with Power SCADA system communication, perform the DEC distant electric control process at corresponding station by sequence of steps, and safeguard the mode field of this thread accordingly.
(A4) actual single step DEC distant electric control process is that the order confirmed according to remote control selection, confirmation of returning to school, remote control execution, execution is carried out, and certain hour of can not being separated by between each step execution.The timing of timer thread notifies that each parallel control is divided into groups sub-thread, by the waiting status field of each sub-thread maintenance itself, if book thread is in waiting status, and the stand-by period exceedes preset value, abandon the step performed immediately, continue to perform next step operation.
(A5) generally speaking, each parallel control sub-thread that divides into groups is independent operating, but the state field value of the sub-thread that also another parallel control can be divided into groups is as the precondition of its a certain step.When there is this kind of situation, by the reading of book thread initiatively timing as the mode field of the sub-thread of precondition, and whether Rule of judgment meets; Sub-thread as precondition does not need to carry out other operations.
(A6) timing of timer thread notifies program control execution main thread, travels through each parallel control to divide into groups the mode field of sub-thread by main thread.When main thread monitors after the sub-thread of all groupings all run or be forced closed, terminate this card and perform.Flow process terminates.
As shown in Figure 2, be thread operational flow diagram two of the present invention, wherein: outside terminal card performs, and when terminating operation, sub-thread 1 not yet completes, and sub-thread 2 completes.
When parallel control divide into groups sub-thread break down time, adopt following processing mode:
(B1) when a certain sub-thread breaks down, namely during remote control equipment operation failure, book thread maintenance operation mode field, and terminate to perform flow process, out of service.
(B2) when a certain sub-thread execution is to a certain step, and when needing the state field value of another sub-thread as precondition, if as the sub-thread of precondition because of failure stopping, then book Thread Termination performs, out of service.
In the present invention, by programmed control button, stop order by outside transmission program, processing mode is as follows:
(C1) after outside transmission program stops order, program control execution main thread is to the instruction field write hard closing instruction of each sub-thread.
(C2) each sub-thread is when performing certain single stepping, and reading command field before remote control selection and remote control perform, if now instruction field is hard closing instruction, then judge book thread execution situation, if current remote control performs and completes, then abandon subsequent operation, out of service; If executed is selected in remote control, and remote control execution not yet performs, then, after transmission remote control is countermanded an order, abandon subsequent operation, out of service.
(C3) program control execution main thread travels through each parallel control and to divide into groups the mode field of sub-thread.When main thread monitors after the sub-thread of all groupings all run or be forced closed, stop this card and perform, flow process terminates.
Based on above-mentioned program control card design and execution step, the explanation of two methods embodiment:
Embodiment 1: as the program control card content of table 1-3, can realize 4 electric substations, carries out 1500V simultaneously and stop power transmission operation, and the operation of each station is independent of each other.
If use sequential control mode, need 14 straighforward operation steps, and parallel control can control to 4 electric substations in same rate-determining steps simultaneously, the maximum operation steps of single electric substation is 4 remote control steps.Therefore operate and all complete whole deadlines that total operating time approximates single website, be i.e. 4 step straighforward operation steps, compared to sequential control, the time can accelerate 4 times.Can the program control card of simultaneously remote control for Geng Duo electric substation, efficiency improves larger.
Embodiment 2: as the program control card content of table 1-3.Can realize a certain electric substation out of service after, carry out accident treatment.Switch our station power switch mode, and start other website power switchs simultaneously.In the present embodiment, although each electric substation can carry out straighforward operation simultaneously, but it needs the switch of operation, need according to the on off state position of other electric substations as logical condition when concrete operations, conventional parallel control can not real-time judge logical condition, generally this kind of operation use of solution sequential control.And parallel control mode of the present invention can solve this kind of problem.
As form Central Plains action need 10 step, use the words of parallel control with embodiment 1, operation all completes total operating time and approximates maximum operation steps site operation step number, i.e. 6 steps.Time is about 3/5 of the origin operation time.Can the program control card of simultaneously remote control for Geng Duo electric substation, efficiency improves larger.
Compared with the prior art, its feature is technical solution of the present invention:
1) general use sequential control mode in prior art, and the present invention uses the mode of parallel control.
2) mode of the parallel control adopted in prior art, cannot communicate and cooperate between each parallel control grouping thread, the present invention solves the problem how sub-cross-thread communicates and cooperate.
3) in prior art, the divide into groups quantity of sub-thread of general each parallel control is pre-defined fixing, and dynamic of the present invention is set up parallel control according to demand and to be divided into groups sub-thread.
4) when general single parallel control grouping runs in prior art, the problem that cannot obtain CPU sheet working time for a long time may be there is, CPU operating pressure can only be alleviated by the mode inserting constant time lag between each step.The present invention need not insert constant time lag between each step, by the sub-thread creation shared section key of each grouping, distributes three mode fields and an instruction field monitors each sub-thread running status in real time.Set up the sub-thread of timer by main thread, timing wake-up is hung up sub-thread and is distributed CPU sheet working time, guarantees the operation that each sub-thread can be timely, stable, safe.
Below be only the detailed description that preferred embodiment of the present invention is carried out, but the present invention is not limited to above embodiment.It should be understood that in the spirit and scope situation of the claim not departing from the application, the various amendments that those skilled in the art makes, still belong to scope of the present invention.
Claims (5)
1., based on a Power SCADA concurrency control method for minicomputer, it is characterized in that described control method comprises following content:
(1) minicomputer adopts explicit parallel instruction to calculate EPIC framework, uses Unix operating system;
(2) parallel program control card data structure, increases parallel control grouping row, parallel control apportion sequence number row and executive condition row;
(3) main thread controls each parallel control and to divide into groups sub-thread, and sets up timer thread;
(4) sub-thread by running status, operating procedure and waiting status three mode fields and an instruction field with main thread communication;
(5) each sub-thread independence and Power SCADA system communication;
Described parallel program control card data structure, wherein:
Described parallel control grouping row: the need of the remote control sequence quantity needing executed in parallel when carrying out parallel control and parallel control when this column data represents that current card performs;
Described parallel control apportion sequence number row: if card needs parallel control to run, then the operation steps sequence in each parallel control series is shown in this list;
Described executive condition row: the precondition that this sequence step of each step action need of card completes or the precondition that other parallel control sequences complete are shown in this list, are the keys for carrying out communicating with other parallel control sequence;
Described program control card performs following steps after selecting:
(A1) after program control card is selected to perform, system sets up program control execution main thread, and this thread to divide into groups sub-thread according to the parallel control of setting up with quantity of this card parallel control packet count in parallel control grouping row, sets up a sub-thread of timer simultaneously;
(A2) program control execution main thread creates shared section key, for each parallel control sub-thread that divides into groups distributes three mode fields and an instruction field:
A. running status field, is respectively operation, hangs up, completes, closes;
B. operating procedure field, namely performs which step of this parallel control grouping;
C. waiting status field, comprises stand-by period and the waiting status of book thread;
D. instruction field, notifies sub-thread by program control execution main thread;
(A3) each parallel control divide into groups sub-thread independently with Power SCADA system communication, perform the DEC distant electric control process at corresponding station by sequence of steps, and safeguard the mode field of this thread accordingly;
(A4) order confirmed according to remote control selection, confirmation of returning to school, remote control execution, execution carries out single step DEC distant electric control process, and the execution of each step must in specific time interval; The timing of timer thread notifies that each parallel control is divided into groups sub-thread, by the waiting status field of each sub-thread maintenance itself, if book thread is in waiting status, and the stand-by period exceedes preset value, abandon the step performed immediately, continue to perform next step operation;
(A5) when occur another parallel control divide into groups situation as the precondition of its a certain step of the state field value of sub-thread time, by the reading of book thread initiatively timing as the mode field of the sub-thread of precondition, and whether Rule of judgment meets; Sub-thread as precondition does not need to carry out other operations;
(A6) timing of timer thread notifies program control execution main thread, travels through each parallel control to divide into groups the mode field of sub-thread by main thread, when main thread monitors after the sub-thread of all groupings all run or be forced closed, terminates this card and performs; Flow process terminates;
Described each parallel control sub-thread that divides into groups can read the mode field of other sub-threads, but can only safeguard the mode field assigned by book thread; Perform the mode field that main thread can read all sub-threads; Instruction field is safeguarded, as the precondition of the execution step of each sub-thread by performing main thread.
2. the Power SCADA concurrency control method based on minicomputer according to claim 1, is characterized in that: described parallel control divides into groups sub-thread when breaking down, and processing mode is as follows:
(B1) when a certain sub-thread breaks down, namely during remote control equipment operation failure, book thread maintenance operation mode field, and terminate to perform flow process, out of service;
(B2) when a certain sub-thread execution is to a certain step, and when needing the state field value of another sub-thread as precondition, if as the sub-thread of precondition because of failure stopping, then book Thread Termination performs, out of service.
3. the Power SCADA concurrency control method based on minicomputer according to claim 1, is characterized in that: described program control card performs by programmed control button, and stop order by outside transmission program, processing mode is as follows:
(C1) after outside transmission program stops order, program control execution main thread is to the instruction field write hard closing instruction of each sub-thread;
(C2) each sub-thread is when performing certain single stepping, and reading command field before remote control selection and remote control perform, if now instruction field is hard closing instruction, then judge book thread execution situation, if current remote control performs and completes, then abandon subsequent operation, out of service; If executed is selected in remote control, and remote control execution not yet performs, then, after transmission remote control is countermanded an order, abandon subsequent operation, out of service;
(C3) program control execution main thread travels through each parallel control and to divide into groups the mode field of sub-thread, and when main thread monitors after the sub-thread of all groupings all run or be forced closed, stop this card and perform, flow process terminates.
4. the Power SCADA concurrency control method based on minicomputer according to claim 1, is characterized in that: the described parallel control sub-thread that divides into groups is set up according to demand dynamic.
5. the Power SCADA concurrency control method based on minicomputer according to claim 1, is characterized in that: the sub-thread creation shared section key of described each grouping, distributes three mode fields and an instruction field monitors each sub-thread running status in real time; Set up the sub-thread of timer by main thread, timing wake-up is hung up sub-thread and is distributed CPU sheet working time, guarantees the operation that each sub-thread can be timely, stable, safe.
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| CN106597911A (en) * | 2015-10-16 | 2017-04-26 | 上海宝信软件股份有限公司 | Parallel control system based on universal power SCADA system |
| CN106656704A (en) * | 2016-11-16 | 2017-05-10 | 北京和利时***工程有限公司 | Modbus protocol remote control result feedback information reading method and device |
| CN108082214B (en) * | 2016-11-22 | 2020-08-04 | 上海宝信软件股份有限公司 | One-key operation emergency response system based on rail transit SCADA |
| CN112579262B (en) * | 2019-09-29 | 2024-02-27 | 北京君正集成电路股份有限公司 | Multithreading parallel processing method with test item adjustment |
| CN113411362B (en) * | 2020-03-16 | 2024-05-14 | 阿里巴巴集团控股有限公司 | Control method, device and equipment of application instance |
| CN111562774B (en) * | 2020-07-14 | 2020-10-16 | 宝信软件(成都)有限公司 | Distributed parallel control method and system for subway network electric power SCADA |
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