CN106502233B - A kind of nuclear plant digital I&C system calibration method - Google Patents
A kind of nuclear plant digital I&C system calibration method Download PDFInfo
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- CN106502233B CN106502233B CN201610864200.0A CN201610864200A CN106502233B CN 106502233 B CN106502233 B CN 106502233B CN 201610864200 A CN201610864200 A CN 201610864200A CN 106502233 B CN106502233 B CN 106502233B
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- school
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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
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0286—Modifications to the monitored process, e.g. stopping operation or adapting control
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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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electric Clocks (AREA)
Abstract
The present invention provides a kind of nuclear plant digital I&C system calibration method, and the server and control station of nuclear plant digital I&C system is calibrated in external clock reference respectively, when external clock reference carries out second grade school to server, when carrying out Millisecond school to control station；Control station clock takes minute and the above data of second grade clock, takes the second grade and Millisecond Data Synthesis control station system time of Millisecond clock.Since grade time second that server is sent was only used in control station to minute and the above time, the source of clocking error is generated between any two control station, and to be that control station carries out produced when Millisecond school, and the error of generation is 1 millisecond.
Description
Technical field
The present invention relates to digitlization instrument control systems technology fields, when particularly relating to a kind of nuclear plant digital I&C system school
Method.
Background technique
Nuclear plant digital I&C system: be in order to meet can be used in the non-security grade field of nuclear power station and protection system it is non-
The instrument control demand in the field that safety level platform is realized.Nuclear plant digital I&C system will produce for nuclear plant safety stable operation
Various performance parameters monitoring analysis, the steady hair of safety, power unit in economic operation, energy-efficient, unit nuclear island and conventional island in the process
Power monitoring, crash analysis, failure wave-recording, transient analysis, malfunction monitoring, for various test data analyzers etc. provide it is highly reliable,
The complete system solution and system platform of High Availabitity rate.
Server: it is mainly used for carrying out Data Centralized Processing, record, provides the highly reliable computer of data service.
Control station: refer to that Level1 includes all devices of controller, various boards, machine cage cabinet.
Currently, scheme is typically all that server is calibrated in external clock reference when the school of control systems of nuclear power plant, then
Server is calibrated control station by NTP, due to being calibrated completely using network, by network bandwidth, communication traffic etc.
Factor is affected, and the clocking error between control station is at 10 milliseconds or so, therefore same digital quantity conjugates information, stands
Between timer error at 10 milliseconds or so.
Timer error between standing greatly has an impact the displacement chronological order of digital quantity control station, leads to nuclear power station
It is first to change which digital quantity operator, which can not tell, which digital quantity changes after being, the difference of this sequencing
It is different that nuclear power station operator can be made to generate erroneous judgement to failure Producing reason.
Summary of the invention
The purpose of the present invention is to the situations of the above-mentioned prior art, propose a kind of nuclear plant digital I&C system
Calibration method is only calibrated server to solve existing control systems of nuclear power plant, causes the timer error between station 10
Millisecond or so, is unfavorable for the problem of control station carries out digital quantity displacement sequence between station.
The purpose of the present invention is achieved through the following technical solutions: a kind of nuclear plant digital I&C system school when side
The server and control station of nuclear plant digital I&C system is calibrated in method, external clock reference respectively, the described method includes:
When second grade school: when external clock reference carries out second grade school to server；
When Millisecond school: when external clock reference carries out Millisecond school to control station；
Time synthesis: the minute of clock and above data when the clock of control station takes the second grade school take the Millisecond
The second grade and Millisecond Data Synthesis control station system time of clock when school.
Further, it is specifically included when the second grade school: when external clock reference provides second grade school to server, temporal information
It is accurate to second, including " date Hour Minute Second "；
Primary server and server-side and client when school when disposing school simultaneously from server, the server-side when school of primary server
Client request when responding school, is calibrated communication with external clock reference, and rear tranmitting data register signal is calibrated to control to the machine
System station；
Server-side request clock signal when client is responsible for primary server school when from the school of server, carries out school to the machine
When.
Further, the external clock reference when second grade school sends primary second grade clock for whole second to main service to be every
Device, server-side carries out the reading of second grade clock with 100 milliseconds by serial ports for the period when school, when the primary server time and it is external when
When primary server is without school when clock source time differs≤100 milliseconds, when primary server time and external clock reference time phase difference
At 100 milliseconds of >, Local clock school is same number of seconds by server-side when school, and by millisecond zero setting.
Further, specifically include when the Millisecond school: external clock reference sends all control stations per whole minute
Millisecond pulse, after receiving the millisecond pulse, the counter of control station is started counting from 0, is added 1 after receiving interruption, is added to 60,000
After receive millisecond pulse next time, then will count clear 0.
The beneficial effects of the present invention are: being distinguished for nuclear plant digital I&C system clock using server and control station
Mode when school carries out Millisecond pulse recording millisecond number in control station, to reach between control station within 1 millisecond of clocking error
Requirement.The sequencing of switching value displacement information is no more than 1 millisecond and lays a good foundation between different control stations, grasps for nuclear power station
The sequencing for making personnel's resolution switching value displacement information is provided convenience.
Detailed description of the invention
Fig. 1 be a kind of nuclear plant digital I&C system calibration method of the present invention integrally school when flow chart；
Fig. 2 is nuclear plant digital I&C system structure chart；
Service routine flow chart when Fig. 3 is school used in server time-revise；
The wiring diagram of external clock pulse when Fig. 4 is Millisecond school.
Specific embodiment
A kind of nuclear plant digital I&C system calibration method of the present invention is described further with reference to the accompanying drawing: the reality
It applies example to be only illustrative of the invention and is not intended to limit the scope of the invention, those skilled in the art are to various equivalences of the invention
The modification of form falls within the application range as defined in the appended claims.
As shown in Figure 1, 2, I&C system includes operator station, server and control station three parts, and external clock reference is not only
It is connected with server, is also connected with each control station.When I&C system receives the two aspect school from external clock reference: service
When device school and when control station school.Wherein, the server host period reads external clock source time, when the local system time and reads
When the time phase difference arrived is greater than 100ms, primary server is according to read access time modification present system time and when having modified system
Between after, grade time second of current system is sent to control station, another aspect control station also receives the pulse letter of external clock reference
Number, it is counted according to the millisecond that pulse signal updates this control station.Final control station will receive grade time second and the sheet of server
The millisecond of control station counts the synthesis system time.
The method specifically includes:
When second grade school: when external clock reference carries out second grade school to server；
When Millisecond school: when external clock reference carries out Millisecond school to control station；
Time synthesis: the minute of clock and above data when the clock of control station takes the second grade school take the Millisecond
The second grade and Millisecond Data Synthesis control station system time of clock when school.
It is specifically included when the second grade school: when external clock reference provides second grade school to primary server and from server, the time
Information is accurate to second, including " date Hour Minute Second "；
Primary server and server-side and client when school when disposing school simultaneously from server, the server-side when school of primary server
Client request when responding school, is calibrated communication with external clock reference, and rear tranmitting data register signal is calibrated to control to the machine
System station；
Server-side request clock signal when client is responsible for primary server school when from the school of server, carries out school to the machine
When.
External clock reference when second grade school is per sending within whole second primary second grade clock to primary server, and when school services
End carries out the reading of second grade clock with 100 milliseconds by serial ports for the period, when primary server time and external clock source time phase
Difference≤100 milliseconds when primary server without school when, when 100 milliseconds of primary server time and external clock reference time phase difference >
When, Local clock school is same number of seconds by server-side when school, and by millisecond zero setting.
Due to control station take be server the minute above clock and control station oneself second grade clock be combined into system
Clock, therefore server time and external clock reference time phase difference are without not interfering with when school no more than 100 milliseconds
The clock for entirety of uniting.
It is specifically included when the Millisecond school:
The master control board card of control station is equipped with crystal oscillator, and the period was 40 nanoseconds, and the error of the crystal oscillator is 1 minute 400 micro-
Second, while operation has real-time operating system VxWorks on master control board card, creates a priority most in VxWorks system
High high-resolution counter task, the counter task are executed by interrupting, and generate one when crystal oscillator goes to 25000 times
Secondary interruption, external clock reference per whole minute sends millisecond pulse to all control station, and (time of this pulse signal consumption is close to 0
Millisecond), after receiving this millisecond pulse, counter is started counting from 0, is added 1 after receiving interruption, is added to 60,000 or so and receives
Then millisecond pulse next time will count clear 0, therefore the timing ability of millisecond temporal information can reach 60,000 milliseconds (1 minutes),
Its clocking error of any two control station is within 800 microseconds simultaneously.Since nuclear plant digital I&C system clock only needs
It is accurate to millisecond, therefore its clocking error of any two control station is 1 millisecond.The wiring of external clock pulse is such as when Millisecond school
Shown in Fig. 4.
The time synthesis:
Grade time second that the system time of control station is sent by primary server and the Millisecond time that control station counts synthesize,
Control station takes the minute and the above time in grade time second, in addition the second of high-resolution counter and millisecond time, form control station
System time.
Service routine flow chart when Fig. 3 is school used in server time-revise, as depicted in the figures, external clock reference by when
Clock signal is sent to the serial ports buffer area of server, and service routine creation timer period reads the clock of serial ports buffer area when school
Data are calibrated the machine, while when school once discovery Local clock and external clock reference clock differ by more than 100ms
Thread when service routine creates school, is periodically sent to control station for the machine time.
Since grade time second that primary server is sent was only used in control station to minute and the above time, any two
The source that clocking error is generated between a control station is produced when being control station progress Millisecond school, therefore nuclear power I&C system
Error is 1 millisecond.
Claims (4)
1. a kind of nuclear plant digital I&C system calibration method, which is characterized in that external clock reference is to nuclear plant digital instrument
The server and control station of control system are calibrated respectively, the described method includes:
When second grade school: when external clock reference carries out second grade school to server；
When Millisecond school: when external clock reference carries out Millisecond school to control station；
Time synthesis: the minute of clock and above data when the clock of control station takes the second grade school, when taking the Millisecond school
The second grade and Millisecond Data Synthesis control station system time of clock；And using server and control station respectively school when side
Formula so that the clock minute of the control station and above data from the external clock reference to the minute of server time-revise and with
Upper data, and between two control stations generate clocking error source be control station carry out Millisecond school when it is produced.
2. a kind of nuclear plant digital I&C system calibration method according to claim 1, which is characterized in that the second grade
Specifically include when school: when external clock reference provides second grade school to server, temporal information is accurate to second, including " time-division date
Second "；
Primary server and server-side and client when school when disposing school simultaneously from server, server-side responds when the school of primary server
Communication is calibrated with external clock reference in client request when school, and rear tranmitting data register signal is calibrated to control station to the machine；
Server-side request clock signal when client is responsible for primary server school when from the school of server, is calibrated the machine.
3. a kind of nuclear plant digital I&C system calibration method according to claim 2, which is characterized in that the second grade
External clock reference when school is per sending within whole second primary second grade clock to primary server, and server-side is by serial ports with 100 when school
Millisecond is the reading for carrying out second grade clock the period, the master when primary server time and external clock reference time phase difference≤100 millisecond
When server is without school, when the primary server time is with 100 milliseconds of external clock reference time phase difference >, server-side incite somebody to action this when school
Machine clock school is same number of seconds, and by millisecond zero setting.
4. a kind of nuclear plant digital I&C system calibration method according to claim 1, which is characterized in that the millisecond
Specifically include when grade school: external clock reference sends millisecond pulse to all control stations per whole minute, receives the millisecond arteries and veins
After punching, the counter of control station is started counting from 0, is added 1 after receiving interruption, millisecond pulse next time is received after being added to 60,000, so
After will count clear 0.
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| CN201610864200.0A CN106502233B (en) | 2016-09-29 | 2016-09-29 | A kind of nuclear plant digital I&C system calibration method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101604142A (en) * | 2008-06-12 | 2009-12-16 | 湖北省电力试验研究院 | The temporal information detection method of the synchronous time service device output signal of satellite |
| CN103338102A (en) * | 2013-07-08 | 2013-10-02 | 国核电力规划设计研究院 | Time synchronization system in nuclear power plant |
| CN105450323A (en) * | 2015-11-11 | 2016-03-30 | 杭州和利时自动化有限公司 | SOE time synchronization control method and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7451339B2 (en) * | 2006-09-15 | 2008-11-11 | International Business Machines Corporation | Pulse-per-second attachment for STP |
| JP2008193799A (en) * | 2007-02-05 | 2008-08-21 | Toshiba Corp | Power system monitoring control system and its remote monitoring control device |
| CN103152117B (en) * | 2012-09-14 | 2016-05-18 | 南京航空航天大学 | A kind of embedded high-precision network time server system |
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- 2016-09-29 CN CN201610864200.0A patent/CN106502233B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101604142A (en) * | 2008-06-12 | 2009-12-16 | 湖北省电力试验研究院 | The temporal information detection method of the synchronous time service device output signal of satellite |
| CN103338102A (en) * | 2013-07-08 | 2013-10-02 | 国核电力规划设计研究院 | Time synchronization system in nuclear power plant |
| CN105450323A (en) * | 2015-11-11 | 2016-03-30 | 杭州和利时自动化有限公司 | SOE time synchronization control method and system |
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