CN103338102B - A kind of time synchronization system in nuclear power plant - Google Patents
A kind of time synchronization system in nuclear power plant Download PDFInfo
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- CN103338102B CN103338102B CN201310283942.0A CN201310283942A CN103338102B CN 103338102 B CN103338102 B CN 103338102B CN 201310283942 A CN201310283942 A CN 201310283942A CN 103338102 B CN103338102 B CN 103338102B
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Abstract
The invention discloses a kind of time synchronization system in nuclear power plant, belong to time synchronized field.Described system include being positioned at the first master clock of the first nuclear island respectively with the second clock server being positioned at network control building and be positioned at the first clock server of the first nuclear island and be connected；The second master clock being positioned at network control building is connected with the first clock server and second clock server respectively；First clock server generates the time reference signal of multi-standard according to the time reference signal received, and is sent respectively to lay respectively at the first master clock of the first conventional island, O&M building, the second nuclear island and the second conventional island, the second master clock, the 3rd master clock and the 4th master clock.The present invention is by arranging master clock in network control building, second nuclear island arranges two grades of master clocks, two grades of master clocks of the second nuclear island clock and the second conventional island are provided parallel to relation, reduce produced error in time signal transmission, improve the precision of time signal, fully meet the network control building grid side equipment requirements for high precision to time signal.
Description
Technical field
The present invention relates to the field of clock synchronization system, particularly to a kind of AP1000 time synchronization system in nuclear power plant.
Background technology
AP1000 nuclear power technology is a kind of advanced person " passive type compressed water reactor nuclear power technology ", is China's generation Ⅲ nuclear power proprietary technology, is also business nuclear power technology the safest, state-of-the-art in nuclear power market, the current whole world.At present, domestic building AP1000 nuclear power station 1# machine and 2# machine by unit machine master-plan, in factory, clock synchronization system arranges clock synchronization system according to plant area's integral arrangement scheme.
In prior art, clock synchronization system includes time synchronized subsystem two groups separate, and often relevant device provides time signal to group subsystem responsible to the nuclear island in zones of different, conventional island, O&M building, network control building etc..As shown in Figure 1, first group of time synchronized subsystem includes 1 set and receives the master clock of GPS clock signal, 3 two grades of master clocks of set, 4 set clock servers and 4 set secondary clocks, internal system adopts primary and secondary structure, it is responsible for the first nuclear island, the first conventional island, BOP(BalanceOfPlant, aid system) and administration quarter building offer time signal, this BOP includes O&M building and network control building etc., and needed for first group of time synchronized subsystem, overlay area is bigger.Second group of time synchronized subsystem includes 1 set and receives the master clock of GPS clock signal, 1 two grades of master clocks of set and 2 set clock servers, and internal system adopts primary and secondary structure, and primary responsibility provides time signal to the second nuclear island and the second conventional island.
In the process realizing the present invention, inventor have found that prior art at least there is problems in that clock synchronization system includes two sets internal in hypotactic time synchronized subsystem, it is completely independent operation between two set time synchronized subsystems, once certain subsystem goes wrong, affecting the output of the time signal of whole clock synchronization system, properly functioning to whole power plant impacts.
Summary of the invention
In order to solve problem of the prior art, embodiments provide a kind of time synchronization system in nuclear power plant.Described technical scheme is as follows:
A kind of time synchronization system in nuclear power plant, described system includes: be positioned at the first master clock and the first clock server, the second master clock being positioned at network control building and second clock server, the first master clock, the second master clock, the 3rd master clock and the 4th master clock of the first nuclear island；
Described first master clock is connected with described first clock server and described second clock server respectively；
Described second master clock is connected with described second clock server and described first clock server respectively；
Described first clock server receives the time reference signal that described first master clock produces, generate the time reference signal of multi-standard according to described time reference signal, and the time reference signal of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock；
Described first master clock, described second master clock, described 3rd master clock and described 4th master clock lay respectively at the first conventional island, O&M building, the second nuclear island and the second conventional island.
Wherein, described second clock server connects described second master clock, receive the time reference signal that described second master clock produces, generate signal lock in time of multi-standard according to described time reference signal, and signal lock in time of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock.
Wherein, described system also includes the 3rd clock server, the 4th clock server, the 5th clock server and the 6th clock server, lays respectively at described first conventional island, described O&M building, described second nuclear island and described second conventional island；
Described 3rd clock server connects described first master clock, receive signal lock in time of the multi-standard that described first master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multi-format is sent to secondary clock；
Described 4th clock server connects described second master clock, receive signal lock in time of the multi-standard that described second master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multi-format is sent to secondary clock；
Described 5th clock server connects described 3rd master clock, receive signal lock in time of the multi-standard that described 3rd master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multi-format is sent to secondary clock；
Described 6th clock server connects described 4th master clock, receive signal lock in time of the multi-standard that described 4th master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multi-format is sent to secondary clock.
Wherein, described first master clock and/or described second master clock are built-in with global position system GPS wireless receiving module, Big Dipper wireless receiving module, crystal oscillator module and the signal processing module being attached respectively with described GPS wireless receiving module, described Big Dipper wireless receiving module and described crystal oscillator module；
Described GPS wireless receiving module, for receiving the gps time signal that gps satellite sends；
Described Big Dipper wireless receiving module, for receiving the Big Dipper time signal that Big Dipper a reference source sends；
Described signal processing module, for obtaining the crystal oscillator time signal that described gps time signal, described Big Dipper time signal and described crystal oscillator module produce, and according to default rule, described gps time signal, described Big Dipper time signal and described crystal oscillator time signal are processed, obtain time reference signal.
Wherein, described signal processing module includes acquiring unit and processing unit；
Described acquiring unit, for obtaining the crystal oscillator time signal that described gps time signal, described Big Dipper time signal and described crystal oscillator module produce；
Described processing unit, for arranging the priority-level of described gps time signal, described Big Dipper time signal and described crystal oscillator time signal, described gps time signal, described Big Dipper time signal and described crystal oscillator time signal are processed by the size according to priority-level, obtain time reference signal.
Wherein, described first master clock and/or described second master clock also built-in wired receiver module, for receiving wired time reference signal that grid side sends；
Correspondingly, described signal processing module, it is additionally operable to obtain described wired time reference signal, and when obtaining less than described gps time signal and described Big Dipper time signal, obtains time reference signal according to described wired time reference signal.
Wherein, the time reference signal that described signal processing module obtains is DC B code.
Wherein, described crystal oscillator module is configured with crystal oscillator board and the rubidium clock board being connected with described crystal oscillation plate card.
Wherein, described signal lock in time of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock, including:
By optical fiber, signal lock in time of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock.
Wherein, described first master clock, described first clock server and described 3rd master clock are powered by nuclear island EDS supplied for electronic system；
Described second master clock is powered by being located at a UPS supplied for electronic system in described network control building；
Described first master clock, described 4th master clock are powered by station-service UPS supplied for electronic system；
Described second master clock is powered by the 2nd UPS supplied for electronic system
The technical scheme that the embodiment of the present invention provides has the benefit that
By master clock being separately positioned on the first nuclear island and network control building, at the master clock of the first nuclear island with formed standby mutually between the master clock in network control building, even if any a set of master clock breaks down, still the time signal from another set of master clock can be received, enhance safety and the reliability of system, additionally, the master clock being positioned at the second nuclear island and the master clock being positioned at the second conventional island are changed into parallel relation by original master slave relation, reduce the time delay of time signal transmission, improve the precision of time signal, fully meet the network control building grid side equipment requirements for high precision to time signal.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the clock synchronization system structural representation provided in prior art；
Fig. 2 is the clock synchronization system structural representation that the embodiment of the present invention 1 provides；
Fig. 3 is the clock synchronization system structural representation that the embodiment of the present invention 2 provides；
Fig. 4 is the clock synchronization system structural representation that the embodiment of the present invention 3 provides.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment 1
Referring to Fig. 2, embodiments providing a kind of time synchronization system in nuclear power plant, described system includes: be positioned at the first master clock 101 and the first clock server 301, the second master clock 102 being positioned at network control building and second clock server the 302, first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204 of the first nuclear island；
First master clock 101 is connected with the first clock server 301 and second clock server 302 respectively；
Second master clock 102 is connected with second clock server 302 and the first clock server 301 respectively；
First clock server 301 receives the time reference signal that the first master clock 101 produces, generate signal lock in time of multi-standard according to time reference signal, and signal lock in time of multi-standard is sent respectively to the first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204；
First master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204 lay respectively at the first conventional island, O&M building, the second nuclear island and the second conventional island.
The system that the embodiment of the present invention provides, by master clock being separately positioned on the first nuclear island and network control building, at the master clock of the first nuclear island with formed standby mutually between the master clock in network control building, even if any a set of master clock breaks down, still the time signal from another set of master clock can be received, enhance safety and the reliability of system, additionally, the master clock being positioned at the second nuclear island and the master clock being positioned at the second conventional island are changed into parallel relation by original master slave relation, reduce the time delay of time signal transmission, improve the precision of time signal, fully meet the network control building grid side equipment requirements for high precision to time signal.
Embodiment 2
Referring to Fig. 3, safer for making AP1000 nuclear power station clock synchronization system run, structure is more reasonable, and the embodiment of the present invention has been improved from system group network and receiving side signal face, embodiments providing a kind of time synchronization system in nuclear power plant, described system includes:
First master clock the 101, second master clock the 102, first master clock the 201, second master clock the 202, the 3rd master clock the 203, the 4th master clock the 204, first clock server 301 and second clock server 302；
Wherein, the first master clock 101 is positioned at the first nuclear island, and is positioned at the second master clock server 302 in network control building and is positioned at the first master clock server 301 of the first nuclear island and is attached respectively；First master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204 lay respectively at the first conventional island, O&M building, the second nuclear island and the second conventional island；
First clock server 301 connects the first master clock 101, receive the time reference signal that the first master clock 101 produces, generate signal lock in time of multi-standard according to time reference signal, and signal lock in time of multi-standard is sent respectively to the first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204；
Second clock server 302 connects the second master clock 102, receive the time reference signal that the second master clock 102 produces, generate signal lock in time of multi-standard according to time reference signal, and signal lock in time of multi-standard is sent respectively to the first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204.
Wherein, master clock is the maincenter part of whole clock synchronization system, its precision and stability have been largely fixed the reliability of whole system, and the embodiment of the present invention is provided with master clock at the first nuclear island and network control building, are called the first master clock and the second master clock.
In order to ensure the reliability of clock synchronization system, the present embodiment is provided with multiple temporal source at the first master clock and/or the second master clock, specifically, first master clock and/or the second master clock are built-in with GPS wireless receiving module, Big Dipper wireless receiving module and crystal oscillator module, GPS wireless receiving module is able to receive that the gps time signal that gps satellite sends, Big Dipper wireless receiving module is able to receive that the Big Dipper time signal that Big Dipper a reference source sends, and crystal oscillator module is used for producing crystal oscillator time signal.Each module can simultaneously parallel running, when one or two module breaks down, do not affect other modules properly functioning, modules is respectively provided with self-checking function, it has been found that fault can be reported to the police immediately.
Specifically, first master clock and/or the second master clock are also built-in with the signal processing module being connected with above-mentioned GPS wireless receiving module, Big Dipper wireless receiving module and crystal oscillator module, for receiving the crystal oscillator time signal that gps time signal, bucket time signal and crystal oscillator module produce, and according to default rule, gps time signal, Big Dipper time signal and crystal oscillator time signal are processed, obtain time reference signal.
Preferred as above-described embodiment, signal processing module includes acquiring unit and processing unit；Acquiring unit is for obtaining the crystal oscillator time signal that gps time signal, Big Dipper time signal and crystal oscillator module produce；Gps time signal, Big Dipper time signal and crystal oscillator time signal, for arranging the priority-level of gps time signal, Big Dipper time signal and crystal oscillator time signal, are processed according to the size of priority-level, obtain time reference signal by processing unit.In the present embodiment, the priority-level of setting can be gps time signal more than Big Dipper time signal, Big Dipper time signal is more than crystal oscillator time signal, when receiving gps time signal, then using this gps time signal as time reference signal；Do not receive gps time signal, when receiving Big Dipper signal, then using this Big Dipper signal as time reference signal；Do not receive gps time signal and Big Dipper signal, then the crystal oscillator time signal produced using crystal oscillator module is as time reference signal.
Specifically, the GPS wireless receiving module that master clock is built-in, it is able to receive that from the fiducial time that gps satellite provides, the UTC(UniversalTimeCoordinated of acquisition standard, Coordinated Universal Time(UTC)) time, and produce accurate standard synchronisation timing code, in order to it is supplied to clock server and/or controls management terminal.The precision of the gps time signal that master clock receives can reach 10-12, the time reference signal signal accuracy of master clock output is better than 10-6；When gps time signal breaks down, master clock will rely on the Big Dipper wireless receiving module arranged, and receives the IRIG-B(InterRangeInstrumentationGroup that Big Dipper a reference source provides, a kind of alternating-current B code) Big Dipper time signal.Preferably, master clock is also built-in with a judge module, whether correct for judging the gps time signal received, if correct, then this gps time signal is sent to signal processing module, if incorrect, then show that this gps time signal breaks down, with the correct gps time signal that receives for the last time for punctual benchmark, continue clock server is calibrated, it is also possible to send the warning message of " GPS failure "；Judge module is additionally operable to judge that whether the Big Dipper time received is correct, if it is correct, then this Big Dipper time signal is sent to signal processing module, if it is incorrect, then show that this Big Dipper time signal breaks down, when school, module is judged when gps time signal and Big Dipper time signal all break down, master clock will rely on the crystal oscillator module independent operating of self high stable constant temperature, it is punctual benchmark with the Big Dipper time signal that the correct gps time signal received for the last time is punctual benchmark or last reception, continue clock server is calibrated, can be sent out " GPS failure " and the warning message of " Big Dipper fault ", master clock has function in time walking, time keeping error is 0.92us/ minute.
In the embodiment of the present invention, receive in the configuration of time signal at the first master clock and the second master clock, take redundant configuration and adopt different time service source, namely GPS wireless receiving module and Big Dipper wireless receiving module are adopted, substantially increase the safety of reception of wireless signals, compared with the mode only configuring 1 road GPS input signal at present at master clock, it is possible to the long-term free oscillation preventing the reasons such as extraneous signal interference and wireless receiving board faults from causing, strengthen system reliability, safety.
Preferably, the second master clock also built-in wired receiver module, it is possible to receive wired time reference signal that grid side sends.Specifically, couple owing to nuclear power station has with power system as power supply point, should be unified with the clock accessing electrical network on the basis that nuclear power station internal clocking synchronous base is unified, in order to the differentiation of system jam.At master clock under normal circumstances, follow the tracks of IRIG-B(alternating-current B code of gps time signal, the offer of Big Dipper a reference source) time signal, Tong Bu with the electrical network retention time as the time reference signal of system using wireless reference signal；When unusual time satellite is unavailable cannot receive wireless time signal time, follow the tracks of wired reference signal that grid side is transmitted by transmission network or dispatch data net, such as DCLS(DC B code) time signal or through data network transmission NTP(NetworkTimeProtocol, a kind of time synchronization protocol) signal, Tong Bu with the electrical network retention time as the time reference signal of system using wired reference signal.
In the embodiment of the present invention, in the configuration of master clock crystal oscillator module, being configured with 1 piece of crystal oscillator board and 1 piece of rubidium clock board, the time signal precision of rubidium clock board can reach 10-12, the short stability substantially increasing whole clock synchronization system with normal stability energy, can too increase stability and the output time precision of system.
Specifically, owing to time precision is required higher by network control building, and the device such as route protection installed in network control building is also significantly high to the required precision of time signal, in order to reduce produced error in signal transmission, improve the precision of time signal, second master clock is arranged on network control building by the embodiment of the present invention, originally the two grades of master clocks being arranged on network control building are upgraded to master clock, and at the first conventional island, O&M building, second nuclear island and the second conventional island are respectively provided with master clock, the master clock being positioned at the second nuclear island and the master clock being positioned at the second conventional island is made to be changed into parallel relation by master slave relation, reduce the time delay of time signal transmission.The two of network control building grades of master clocks are upgraded to one-level master clock, reduces the time delay of signal transmission, improve the precision of clock sync signal, fully meet the network control building grid side equipment demand to split-second precision signal.
Further, the first master clock being positioned at the first nuclear island can be attached by optical fiber with the second master clock server being positioned at network control building, this second all the time server connect the second master clock, thus the first master clock and the second master clock are formed standby mutually.So, when any a set of master clock breaks down, still can receive the time signal from another set of clock synchronization system, substantially increase safety and the reliability of system.
Wherein, clock server receive from higher level's master clock (as, master clock) time reference signal, the time reference signal of multi-standard is generated according to time reference signal, and the time reference signal of multi-standard is sent to subordinate's master clock, for the standard clock signal of subordinate's master clock (e.g., master clock) and other main frames or device offer multi-standard, clock server can also do not receive higher level's master clock synchronizing signal or note abnormalities time signal time, close output port.Clock server can provide time signal and the frequency signal of the multiple formats such as serial code, pulse signal, B code, MOSFET idle contact, NTP, SNTP by multiple output card, and scene configures board according to demand to export different types of time signal.Wherein, serial code is RS232(recommendedstandard232 such as, a kind of serial physical interface standards), RS485/422(serial physical interface standards) etc., pulse signal is PPS, PPM, PPH, PPD etc. such as, B code such as direct current difference B code, direct current TTLB code, Sine Modulated alternating-current B code etc..
Specifically, at least provided with two clock servers in the present embodiment, the first clock server 301 being respectively connected with the first master clock 101 and the second clock server 302 being connected with the second master clock 102, signal lock in time of multi-standard is sent respectively to the first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204 by the first clock server 301, and signal lock in time of multi-standard is sent respectively to the first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204 by second clock server 302.
So, all two grades of master clocks be positioned at the first master clock of the first nuclear island and be positioned at second master clock in network control building and be all attached, two grades of master clocks receive the time synchronizing signal from the first master clock and the second master clock simultaneously, possess 2 external clock references, substantially increasing the reliability of two grades of master clocks, clock synchronization system has just been changed into the master clock clock synchronization system that standby, two grades of master clock 2 tunnels input mutually by single master-slave mode.
Wherein, the present embodiment is provided with multiple reception and carrys out the master clock of the time reference signal that master clock provides, it is properly termed as two grades of master clocks, the time signal of self is calibrated by two grades of master clocks, and by netting twine, communication cable, optical fiber or optical cable, time signal is sent to clock server and/or controls to manage terminal.Two grades of master clocks are separately positioned on the first conventional island, the second conventional island, the second nuclear island and O&M building.For ensureing the stability of system, two grades of master clocks being set to triple clock source, namely includes the redundant configuration of GPS wireless receiving module, Big Dipper wireless receiving module and crystal oscillator module, three modules are run simultaneously, wherein one or two module breaks down, and does not affect other modules properly functioning.When there being the time signal from higher level's master clock to input, two grades of master clocks can produce precision and be better than 10-6Time and frequency standard signal, when losing master clock signal input, two grades of master clocks also have function in time walking, and time keeping error is 0.92us/ minute.
In the embodiment of the present invention, by the first clock server being connected with the first master clock is attached with the first master clock, the second master clock, the 3rd master clock and the 4th master clock respectively, make the first master clock, the second master clock, the 3rd master clock and the 4th master clock can receive the time reference signal of the multi-standard that the first master clock sends, so, the clock synchronization system that one interconnects is defined, it is achieved the time unification in whole clock synchronization system between two the first master clocks and four master clocks.
The system that the embodiment of the present invention provides, by master clock being separately positioned on the first nuclear island and network control building, at the master clock of the first nuclear island with formed standby mutually between the master clock in network control building, even if any a set of master clock breaks down, still the time signal from another set of master clock be can receive, safety and the reliability of system enhanced.Additionally, the master clock being positioned at the second nuclear island and the master clock being positioned at the second conventional island are changed into parallel relation by original master slave relation, reduce the time delay of time signal transmission, improve the precision of time signal, fully meet the network control building grid side equipment requirements for high precision to time signal.The wireless receiving module of master clock receives GPS and two kinds of time sources of the Big Dipper, and is able to receive that wired time signal source, substantially increases the safety of reception of wireless signals.Master clock configures rubidium clock board, is greatly improved the stability of whole clock synchronization system, too increases the stability of system and the precision of output time.By providing two external clock references for two grades of master clocks, substantially increase the reliability of two grades of master clocks, further increase the stability of system and the precision of output time.
Embodiment 3
The embodiment of the present invention is to improve on the basis of above-described embodiment 2, referring to Fig. 4, the time synchronization system in nuclear power plant that the present embodiment provides also has been improved in system power supply, and described system includes: the first master clock the 101, second master clock the 102, first master clock the 201, second master clock the 202, the 3rd master clock the 203, the 4th master clock the 204, first clock server 301 and second clock server 302；
Wherein, the first master clock 101 is positioned at the first nuclear island, and is positioned at the second master clock server 302 in network control building and is positioned at the first master clock 301 of the first nuclear island and is attached respectively；Second master clock 202 is connected with second clock server 302 and the first clock server 301 respectively；
First master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204 lay respectively at the first conventional island, O&M building, the second nuclear island and the second conventional island；
First clock server 301 connects the first master clock 101, receive the time reference signal that the first master clock 101 produces, generate signal lock in time of multi-standard according to time reference signal, and signal lock in time of multi-standard is sent respectively to the first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204；
Second clock server 302 connects the second master clock 102, receive the time reference signal that the second master clock 102 produces, generate signal lock in time of multi-standard according to time reference signal, and signal lock in time of multi-standard is sent respectively to the first master clock the 201, second master clock the 202, the 3rd master clock 203 and the 4th master clock 204；
First master clock the 101, first clock server 301 and the 3rd master clock 203 are powered by nuclear island EDS supplied for electronic system；Second master clock 102 is powered by being located at a UPS supplied for electronic system in network control building；First master clock the 201, the 4th master clock 204 is powered by station-service UPS supplied for electronic system；Second master clock 202 is powered by the 2nd UPS supplied for electronic system.
Further, the clock system that the present embodiment provides also includes the 3rd clock server the 303, the 4th clock server the 304, the 5th clock server 305 and the 6th clock server 306, lays respectively at the first conventional island, O&M building, the second nuclear island and the second conventional island；
3rd clock server 303 connects the first master clock 201, receive signal lock in time of the multi-standard that the first master clock 201 sends, signal lock in time of multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of multi-format is sent to secondary clock；
4th clock server 304 connects the second master clock 202, receive signal lock in time of the multi-standard that the second master clock 202 sends, signal lock in time of multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of multi-format is sent to secondary clock；
5th clock server 305 connects the 3rd master clock 203, receive signal lock in time of the multi-standard that the 3rd master clock 203 sends, signal lock in time of multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of multi-format is sent to secondary clock；
6th clock server 306 connects the 4th master clock 204, receive signal lock in time of the multi-standard that the 4th master clock 204 sends, signal lock in time of multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of multi-format is sent to secondary clock.
Wherein, secondary clock is used for showing the time, is installed in factory and Administrative Area, is provided with multiple secondary clock in the entire system, provides temporal information accurately for each regional work personnel.Under normal operating conditions, secondary clock carrys out the time reference signal of master clock as correcting delay signal via clock server automatic reception, correctly shows after its temporal is calibrated；Under abnormal conditions, after secondary clock and master clock communication disruption, secondary clock remains to the time signal independent operating adopting self crystal oscillator to produce.
In the process of each zone time signal transmission, in order to reduce the distorted signals impact on time accuracy, the transmission medium of master clock and two grades of master clocks adopts optical fiber, and signal adopts the DCLS(DC B code that the impact of time synchronized accuracy is less) signal.
Further, the clock system that the embodiment of the present invention provides is powered by supplied for electronic system, this supplied for electronic system includes: the non-1E level unidirectional current of nuclear island EDS() supplied for electronic system, UPS(UninterruptedPowerSupply, uninterrupted power source) supplied for electronic system, station-service UPS supplied for electronic system and the 2nd UPS supplied for electronic system；Wherein, nuclear island EDS supplied for electronic system is the master clock of the first nuclear island and two grades of master clocks of the second nuclear island are powered；Oneth UPS supplied for electronic system is located at network control building, is powered for network control building；Station-service UPS supplied for electronic system is two grades of master clocks of two grades of master clocks of the first conventional island, the second conventional island, and all secondary clocks are powered；Two grades of master clocks that 2nd UPS supplied for electronic system is O&M building are powered.
Specifically, VXO: the master clock of the first nuclear island is powered by nuclear island EDS system, the master clock in network control building is powered by the ups system being located at network control building, and after losing station service, master clock still can maintain power supply 2 hours；Two grades of master clocks are powered: two grades of master clocks of the first conventional island and the second conventional island are powered by station-service ups system, and the second nuclear island two grades master clock is powered by nuclear island EDS system, and after losing station service, two grades of master clocks still can maintain power supply 2 hours；Two grades of master clocks in O&M building are by the ups system being separately provided in O&M building, and after losing station service, two grades of master clocks still can maintain power supply 2 hours.
Further, the clock system of the embodiment of the present invention also includes access switch, and this access switch connects two grades of master clocks and Factory Building.Wherein, above-mentioned supplied for electronic system also includes the 3rd UPS supplied for electronic system, for being powered for access switch, it is ensured that after losing station service, still can maintain power supply 2 hours, still can provide time synchronizing signal to equipment in Factory Building.
The system that the embodiment of the present invention provides, by master clock being separately positioned on the first nuclear island and network control building, at the master clock of the first nuclear island with formed standby mutually between the master clock in network control building, even if any a set of master clock breaks down, still the time signal from another set of master clock be can receive, safety and the reliability of system enhanced.Additionally, the master clock being positioned at the second nuclear island and the master clock being positioned at the second conventional island are changed into parallel relation by original master slave relation, reduce the time delay of time signal transmission, improve the precision of time signal, fully meet the network control building grid side equipment requirements for high precision to time signal.By master clock and two grades of master clocks are adopted different supplied for electronic systems, improve the safety of system power supply.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can be completed by hardware, can also be completed by the hardware that program carrys out instruction relevant, described program can be stored in a kind of computer-readable recording medium, storage medium mentioned above can be read only memory, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (9)
1. a time synchronization system in nuclear power plant, it is characterized in that, described system includes: be positioned at the first master clock and the first clock server, the second master clock being positioned at network control building and second clock server, the first master clock, the second master clock, the 3rd master clock and the 4th master clock of the first nuclear island；
Described first master clock is connected with described first clock server and described second clock server respectively；
Described second master clock is connected with described second clock server and described first clock server respectively；
Described first clock server receives the time reference signal that described first master clock produces, generate the time reference signal of multi-standard according to described time reference signal, and the time reference signal of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock；
Described first master clock, described second master clock, described 3rd master clock and described 4th master clock lay respectively at the first conventional island, O&M building, the second nuclear island and the second conventional island；
Wherein, described first master clock and/or described second master clock are built-in with global position system GPS wireless receiving module, Big Dipper wireless receiving module, crystal oscillator module and the signal processing module being attached respectively with described GPS wireless receiving module, described Big Dipper wireless receiving module and described crystal oscillator module；
Described GPS wireless receiving module, for receiving the gps time signal that gps satellite sends；
Described Big Dipper wireless receiving module, for receiving the Big Dipper time signal that Big Dipper a reference source sends；
Described signal processing module, for obtaining the crystal oscillator time signal that described gps time signal, described Big Dipper time signal and described crystal oscillator module produce, and according to default rule, described gps time signal, described Big Dipper time signal and described crystal oscillator time signal are processed, obtain time reference signal；
Described first master clock and/or described second master clock are also built-in with a judge module, whether correct for judging the gps time signal received, if it is correct, then this gps time signal is sent to described signal processing module, if incorrect, then show that this gps time signal breaks down, with the correct gps time signal that receives for the last time for punctual benchmark, continue described first clock server and/or described second clock server are calibrated, and send the warning message of GPS failure；Described judge module is additionally operable to judge that whether the Big Dipper time received is correct, if it is correct, then this Big Dipper time signal is sent to described signal processing module, if it is incorrect, then show that this Big Dipper time signal breaks down, when school, module is judged when gps time signal and Big Dipper time signal all break down, described first master clock and/or described second master clock will rely on the crystal oscillator module independent operating of self, it is punctual benchmark with the Big Dipper time signal that the correct gps time signal received for the last time is punctual benchmark or last reception, continue described first clock server and/or described second clock server are calibrated, and send GPS failure and the warning message of Big Dipper fault, described first master clock and/or described second master clock have function in time walking.
2. the system as claimed in claim 1, it is characterized in that, described second clock server connects described second master clock, receive the time reference signal that described second master clock produces, generate signal lock in time of multi-standard according to described time reference signal, and signal lock in time of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock.
3. system as claimed in claim 1 or 2, it is characterized in that, described system also includes the 3rd clock server, the 4th clock server, the 5th clock server and the 6th clock server, lays respectively at described first conventional island, described O&M building, described second nuclear island and described second conventional island；
Described 3rd clock server connects described first master clock, receive signal lock in time of the multi-standard that described first master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multiple format is sent to secondary clock；
Described 4th clock server connects described second master clock, receive signal lock in time of the multi-standard that described second master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multiple format is sent to secondary clock；
Described 5th clock server connects described 3rd master clock, receive signal lock in time of the multi-standard that described 3rd master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multiple format is sent to secondary clock；
Described 6th clock server connects described 4th master clock, receive signal lock in time of the multi-standard that described 4th master clock sends, signal lock in time of described multi-standard is extended obtaining signal lock in time of multiple format, and signal lock in time of described multiple format is sent to secondary clock.
4. the system as claimed in claim 1, it is characterised in that described signal processing module includes acquiring unit and processing unit；
Described acquiring unit, for obtaining the crystal oscillator time signal that described gps time signal, described Big Dipper time signal and described crystal oscillator module produce；
Described processing unit, for arranging the priority-level of described gps time signal, described Big Dipper time signal and described crystal oscillator time signal, described gps time signal, described Big Dipper time signal and described crystal oscillator time signal are processed by the size according to priority-level, obtain time reference signal.
5. the system as claimed in claim 1, it is characterised in that described first master clock and/or described second master clock also built-in wired receiver module, for receiving wired time reference signal that grid side sends；
Correspondingly, described signal processing module, it is additionally operable to obtain described wired time reference signal, and when obtaining less than described gps time signal and described Big Dipper time signal, obtains time reference signal according to described wired time reference signal.
6. system as claimed in claim 5, it is characterised in that the time reference signal that described signal processing module obtains is DC B code.
7. the system as claimed in claim 1, it is characterised in that described crystal oscillator module is configured with crystal oscillator board and the rubidium clock board being connected with described crystal oscillation plate card.
8. system as claimed in claim 1 or 2, it is characterised in that described signal lock in time of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock, including:
By optical fiber, signal lock in time of described multi-standard is sent respectively to the first master clock, described second master clock, described 3rd master clock and described 4th master clock.
9. the system as claimed in claim 1, it is characterised in that described first master clock, described first clock server and described 3rd master clock are powered by nuclear island EDS supplied for electronic system；
Described second master clock is powered by being located at a UPS supplied for electronic system in described network control building；
Described first master clock, described 4th master clock are powered by station-service UPS supplied for electronic system；
Described second master clock is powered by the 2nd UPS supplied for electronic system.
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| CN106502233B (en) * | 2016-09-29 | 2019-06-07 | 北京广利核系统工程有限公司 | A kind of nuclear plant digital I&C system calibration method |
| CN106909197B (en) * | 2017-02-28 | 2020-02-07 | 郑州云海信息技术有限公司 | Virtualization host time management method and virtualization host system |
| CN107947887B (en) * | 2017-12-05 | 2019-06-25 | 郑州云海信息技术有限公司 | Clock system and method between a kind of server based on PTP protocol |
| CN108594633A (en) * | 2018-07-02 | 2018-09-28 | 国家电网有限公司 | A kind of electric energy meter dual time base timing device and method |
| CN109253749A (en) * | 2018-09-18 | 2019-01-22 | 中国电力科学研究院有限公司 | A kind of grade for measuring equipment clock error event determines method |
| CN111381486B (en) * | 2018-12-28 | 2022-02-08 | 北京金风科创风电设备有限公司 | Controller timing method and device, controller and wind generating set |
| CN111698052B (en) * | 2020-06-12 | 2023-04-07 | 四川革什扎水电开发有限责任公司 | Homologous time synchronization system crossing power safety zone |
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