CN202748611U - Synchronization system for power network time - Google Patents
Synchronization system for power network time Download PDFInfo
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- CN202748611U CN202748611U CN 201220375224 CN201220375224U CN202748611U CN 202748611 U CN202748611 U CN 202748611U CN 201220375224 CN201220375224 CN 201220375224 CN 201220375224 U CN201220375224 U CN 201220375224U CN 202748611 U CN202748611 U CN 202748611U
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Abstract
The utility model discloses a synchronization system for power network time. The synchronization system for the power network time comprises a master clock, a time signal transmission channel and a time signal user equipment interface. The master clock comprises a time signal receiving unit used to receive external time base signal, a time keeping unit and a time signal output unit. The time keeping unit is used to travel synchronously based on the external time base signal when the external time base signal is received, and to travel by keeping reserved punctuality and accuracy when the external time base signal is not received. The time signal output unit is used to enable signal to be synchronized based on output time of the external time base signal when the external time base signal is received, and to keep the signal synchronized based on output time of the time keeping unit when the external time base signal is not received. According to the synchronization system for the power network time, time service system of user equipment in an electric power system is identical, synchronizing signal is formed through satellite time or ground time, and the unity of time in the electric power system is achieved.
Description
Technical field
The utility model relates to power domain, in particular to the synchro system of a kind of electrical network time.
Background technology
The scheduling institutions at different levels of China's electrical network, generating plant, transformer station, centralized control center etc. all need a unified precise time benchmark to satisfy various systems and equipment to the requirement of time synchronized, guarantee the real-time data acquisition time consistency, improve the accuracy of line fault range finding, phasor and the measurement of merit angular motion attitude, unit and electrical network parameter verification, thereby improve the level of power grid accident analysis and stable control, improve operation of power networks efficient and reliability, adapt to the development need of the large Power System Interconnection of China, UHV transmission.
At present; each transformer station's time dissemination system independent operating; the various systems that adopt in the electric system are (such as dispatch automated system; energy management system; Style Product Information Management System and supervisory system etc.) and power equipment (such as protective relaying device; intelligent electronic device; sequence of event SOE; factory's station automatic control equipment; safety and stability control device and fault filter etc.) time can not reach complete unity; there is not the reserve time dissemination system; there is larger difference in each system aspect describing in the time; be difficult to the accurate description time sequencing, brought certain difficulty for the analysis of electric network fault.
Time dissemination system for each transformer station in the correlation technique is separate, causes skimble-scamble problem of electric system time, not yet proposes at present effective solution.
The utility model content
Fundamental purpose of the present utility model is to provide the synchro system of a kind of electrical network time, and is separate with the time dissemination system that solves each transformer station, causes skimble-scamble problem of electric system time.
To achieve these goals, according to an aspect of the present utility model, provide the synchro system of a kind of electrical network time.
Synchro system according to the electrical network of the present utility model time comprises major clock, time signal transmission channel and time signal user device interface, and wherein, major clock comprises: the time signal receiving element is used for receiving the external time reference signal; The time holding unit, be connected with the time signal receiving element, the time holding unit is the clock of major clock inside, be used for when receiving the external time reference signal, when running on foot together according to the external time reference signal, when not receiving the external time reference signal, when the punctual accuracy that keeps predetermined is walked; And time signal output unit, be connected respectively with the time holding unit with the time signal receiving element, be used for when receiving the external time reference signal, according to external time reference signal output time synchronizing signal, when not receiving the external time reference signal, according to time holding unit output time synchronizing signal, wherein, the time signal transmission channel is connected with major clock, is used for the time signal output unit of time signal output unit output is transferred to subscriber equipment via the time signal user device interface.
Further, the time signal receiving element comprises: the wireless time signal receiving unit is used for the time reference signal that reception big-dipper satellite or gps satellite transmit; And wired time signal receiving element, be used for receiving the time reference signal that export in higher level ground elapsed time source.
Further, the oscillation source of the internal clocking of time holding unit adopts quartz crystal oscillator or atomic frequency standard.
Further, major clock also comprises: the signal designation unit, be used for when the time signal receiving element receives the external time reference signal, export the first condition indicative signal, when the time signal receiving element does not receive the external time reference signal, export the second condition indicative signal, the first condition indicative signal and the second condition indicative signal are different signals.
Further, major clock also comprises: power supply unit is used for connecting interchange or direct supply, so that the working power of major clock to be provided.
Further, major clock also comprises: the power supply indicating member, be used for working power at major clock and export the first power indication signal when normal, when the working power of major clock is interrupted, output second source indicator signal, wherein, the first power indication signal and second source indicator signal are different signals.
Further, major clock also comprises: time display unit, the temporal information when walking for the displaying time holding unit.
Further, the time signal transmission channel comprises: concentric cable, have the shielding control cables, voice communication cable or optical fiber.
Further, the time signal user device interface comprises: static idle contact interface, Transistor-Transistor Logic level interface, RS-232 interface, RS-422 interface, RS-485, electric current loop interface or AC modulation signal interface.
Pass through the utility model, employing comprises the synchro system of the electrical network time of following structure: major clock, time signal transmission channel and time signal user device interface, wherein, major clock comprises: the time signal receiving element that is used for receiving the external time reference signal; As the clock time holding unit of major clock inside, when receiving the external time reference signal, when running on foot together according to the external time reference signal, when not receiving the external time reference signal, when the punctual accuracy that keeps predetermined is walked; And when receiving the external time reference signal, according to external time reference signal output time synchronizing signal, when not receiving the external time reference signal, time signal output unit according to time holding unit output time synchronizing signal, wherein, the time signal transmission channel is used for the time signal output unit of time signal output unit output is transferred to subscriber equipment via the time signal user device interface, can make each subscriber equipment in the electric system (also is each system in the electric system, each power equipment) has unified time dissemination system, the time dissemination system that has solved each transformer station is separate, cause skimble-scamble problem of electric system time, and then reached the effect of unified power system time.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the block diagram according to the synchro system of the electrical network time of the utility model embodiment.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Fig. 1 is the block diagram according to the synchro system of the electrical network time of the utility model embodiment, as shown in Figure 1, the synchro system of this electrical network time is installed in dispatching center's (dispatching office), generating plant and the transformer station, comprises major clock 20, time signal transmission channel 40 and time signal user device interface 60.
Wherein, major clock 20 carries the high stable time reference, when walking with pre-determined accuracy, can receive the external time reference signal, and can the transmitting time synchronizing signal, comprises time signal receiving element 22, time holding unit 24 and time signal output unit 26.
Time signal receiving element 22 is used for receiving the external time reference signal.Preferably, time signal receiving element 22 comprises wireless time signal receiving unit and wired time signal receiving element, wherein, the wireless time signal receiving unit is used for receiving the time reference signal that the wireless means such as big-dipper satellite or gps satellite or shortwave broadcasting and TV are transmitted; Wired time signal receiving element receives the time reference signal that other major clocks send on the ground such as higher level transformer station or dispatching center by wire or optical fiber, its time reference signal is as the reserve external time reference signal of major clock, when the time reference signal that can't obtain from overhead satellites, take ground elapsed time of upper level as time reference signal, thereby guaranteed the stability of time signal.
Time holding unit 24 is connected with time signal receiving element 22, and time holding unit 24 is the clock of major clock 20 inside, and is synchronous by the external time reference signal when receiving the external time reference signal, when running on foot together according to the external time reference signal; When not receiving the external time reference signal, when the punctual accuracy that keeps predetermined is walked, make the time synchronizing signal of major clock 20 outputs still can guarantee certain accuracy, wherein, the clock accuracy of time holding unit 24 should be better than 7 * 10
-8
Preferably, the oscillation source of the internal clocking of time holding unit 24 can be selected common quartz crystal oscillator according to the requirement of clock accuracy, quartz crystal oscillator or the atomic frequency standard of temperature compensation are arranged.
Time signal output unit 26 is connected respectively with time holding unit 24 with time signal receiving element 22, when major clock 20 receives the external time reference signal, according to external time reference signal output time synchronizing signal; When not receiving the external time reference signal, also be the clock output time synchronizing signal of time holding unit 24 according to internal clocking, when the external time reference signal receives recovery, automatically switch to normal condition work, switching time should be less than 0.5s.
Preferably, major clock 20 should be exported time synchronizing signal sufficient amount, dissimilar, for example by PTP, NTP, B code, pulse or frequency output time synchronizing signal, and, can satisfy by expansion time signal output unit 26 needs of different use occasions.
After 20 rise time of the major clock synchronizing signal, time synchronizing signal transfers to subscriber equipment via time signal transmission channel 40, time signal user device interface 60, comprise various systems and power equipment in the electric system, wherein, time signal transmission channel 40 comprises concentric cable, shielding control cables, voice communication cable or optical fiber is arranged, time signal user device interface 60 comprises static idle contact interface, Transistor-Transistor Logic level interface, RS-232 interface, RS-422 interface, RS-485, electric current loop interface or AC modulation signal interface according to the subscriber equipment needs.
In the synchro system of the electrical network time that this embodiment provides, realize the power grid integrated time synchronized based on big-dipper satellite and GPS navigation system, the external time reference signal can receive the wireless transmission of satellite in the sky, can be when not receiving satellite-signal yet, use ground elapsed time benchmark is as reference signal for subsequent use, by " world is standby mutually " technology and networking technology, make up an integrated clock synchronization system that satisfies the intelligent operation of electrical network needs, thereby realize the comprehensive covering of electrical network clock synchronization system, integrated clock synchronization system will be realized from generating until unification and the time synchronized consistance of all time references of electricity consumption, so that the time dissemination system of each transformer station is same, and then reach the electric system time unification.
Preferably, major clock also comprises: power supply unit, be used for to connect exchange or direct supply, and so that the working power of major clock to be provided, wherein, the Alternating Current Power Supply parameter is: 220V ± 20% (50Hz+/-1Hz), power consumption ﹤ 15W; The direct current supply parameter is: 110V ± 20% or 220V ± 20%, power consumption ﹤ 15W.
Further preferably, the housing face-plate at major clock arranges following duty indication: signal designation unit and power supply indicating member.Wherein, the signal designation unit is used for when the time signal receiving element receives the external time reference signal, export the first condition indicative signal, when the time signal receiving element does not receive the external time reference signal, export the second condition indicative signal, the first condition indicative signal and the second condition indicative signal are different signals; The power supply indicating member is used for working power at major clock and exports the first power indication signal when normal, when the working power of major clock is interrupted, output second source indicator signal, wherein, the first power indication signal and second source indicator signal are different signals, by the preferred embodiment, major clock can intuitively show its work at present state.
Wherein, when the time signal receiving unit does not receive the second condition indicative signal of external time reference signal output, all can be set to the sound alarm signal when the second source indicator signal of the working power interrupt output of major clock, for example drive outside sound-producing device and produce audible alarm, the electrical interface type of alerting signal is preferably the relay idle contact.
Preferably, major clock also comprises time display unit, and the temporal information when being used for the displaying time holding unit and walking in the time of showing, minute, second, can show date, i.e. year, month, day in case of necessity.
Preferably, when building the electrical network clock synchronization system of whole electric system, at first dispose a major clock in power supply administration, receive the Big Dipper, gps satellite signal, receive simultaneously from upper level (such as: state network regulation degree center) more senior clock to the time signal, export high-precision, the stable time, offer the PTP time service service of next stage transformer station, converter with SDH is delivered to the PTP signal on the SDH basic routing line, and major clock is local professional system server time service by the user device interface of time signal simultaneously.Then transformer station's two the time synchronized major clocks of configuration (built-in crystal oscillator) at 220KV provide the time service service to transformer station; adopt simultaneously existing electric power data proprietary network; receive from the PTP temporal information of power supply administration making up the ground elapsed time synchronizing network in the whole zone by the SDH mode, and give that the systems such as telemechanical apparatus, protection equipment provide the mode time services services such as PTP, NTP, B code, pulse or frequency in the station.Transformer station's time synchronized major clock of configuration (built-in crystal oscillator) at 110KV provides the time service service to transformer station at last; adopt simultaneously existing electric power data proprietary network; receive from the PTP temporal information of power supply administration making up the ground elapsed time synchronizing network in the whole zone by the SDH mode, and give that the systems such as telemechanical apparatus, protection equipment provide the mode time services services such as PTP, NTP, B code, pulse or frequency in the station.
Simultaneously, monitoring management system in power supply administration's config set carries out Real Time Monitoring with each master-salve clock state, when the phenomenon such as breaking down, time deviation is excessive, carries out real-time alarm.Monitoring software can calculate time deviation and delay, and then with timestamp, deviation and postpone input database shows a plurality ofly behind clock or single clock jitter figure when switching to, and time deviation is graphically shown.In addition, each deviation from clock, delay can also be checked out by historical data base and be analyzed.
From above description, can find out, the utility model has been realized following technique effect: when receiving the external time reference signal, according to external time reference signal output time synchronizing signal, when not receiving the external time reference signal, clock output time synchronizing signal according to major clock inside, the time signal transmission channel transfers to subscriber equipment with this time signal output unit via the time signal user device interface, so that each subscriber equipment in the electric system has unified time dissemination system, and then unified the time in the electric system.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1. the synchro system of an electrical network time is characterized in that, comprising:
Major clock, described major clock comprises:
The time signal receiving element is used for receiving the external time reference signal;
The time holding unit, be connected with described time signal receiving element, described time holding unit is the clock of described major clock inside, be used for when receiving described external time reference signal, when running on foot together according to described external time reference signal, when not receiving described external time reference signal, when the punctual accuracy that keeps predetermined is walked; And
The time signal output unit, be connected respectively with described time holding unit with described time signal receiving element, be used for when receiving described external time reference signal, according to described external time reference signal output time synchronizing signal, when not receiving described external time reference signal, according to described time holding unit output time synchronizing signal
The time signal user device interface; And
The time signal transmission channel is connected with described major clock, is used for the time signal output unit of described time signal output unit output is transferred to subscriber equipment via described time signal user device interface.
2. the synchro system of electrical network time according to claim 1 is characterized in that, described time signal receiving element comprises:
The wireless time signal receiving unit is used for the time reference signal that reception big-dipper satellite or gps satellite transmit;
And
Wired time signal receiving element is used for receiving the time reference signal that export in higher level ground elapsed time source.
3. the synchro system of electrical network time according to claim 1 is characterized in that, the oscillation source of the internal clocking of described time holding unit adopts quartz crystal oscillator or atomic frequency standard.
4. the synchro system of electrical network time according to claim 1 is characterized in that, described major clock also comprises:
The signal designation unit, be used for when described time signal receiving element receives described external time reference signal, export the first condition indicative signal, when described time signal receiving element does not receive described external time reference signal, export the second condition indicative signal, described the first condition indicative signal and described the second condition indicative signal are different signals.
5. the synchro system of electrical network time according to claim 1 is characterized in that, described major clock also comprises:
Power supply unit is used for connecting interchange or direct supply, so that the working power of described major clock to be provided.
6. the synchro system of electrical network time according to claim 5 is characterized in that, described major clock also comprises:
The power supply indicating member, be used for working power at described major clock and export the first power indication signal when normal, when the working power of described major clock is interrupted, output second source indicator signal, wherein, described the first power indication signal and described second source indicator signal are different signals.
7. the synchro system of electrical network time according to claim 1 is characterized in that, described major clock also comprises:
Time display unit is used for showing the temporal information when the described time, holding unit was walked.
8. the synchro system of electrical network time according to claim 1 is characterized in that, described time signal transmission channel comprises: concentric cable, have the shielding control cables, voice communication cable or optical fiber.
9. the synchro system of electrical network time according to claim 1, it is characterized in that described time signal user device interface comprises: static idle contact interface, Transistor-Transistor Logic level interface, RS-232 interface, RS-422 interface, RS-485, electric current loop interface or AC modulation signal interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220375224 CN202748611U (en) | 2012-07-30 | 2012-07-30 | Synchronization system for power network time |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220375224 CN202748611U (en) | 2012-07-30 | 2012-07-30 | Synchronization system for power network time |
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| CN202748611U true CN202748611U (en) | 2013-02-20 |
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| CN 201220375224 Expired - Lifetime CN202748611U (en) | 2012-07-30 | 2012-07-30 | Synchronization system for power network time |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576543A (en) * | 2012-07-30 | 2014-02-12 | 国家电网公司 | Power grid time synchronization system |
| CN104199281A (en) * | 2014-09-04 | 2014-12-10 | 首钢京唐钢铁联合有限责任公司 | Time alignment system based on GPS (global position system) and compass system |
| CN104734338A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Clock monitoring method, device and system of transformer substations |
-
2012
- 2012-07-30 CN CN 201220375224 patent/CN202748611U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576543A (en) * | 2012-07-30 | 2014-02-12 | 国家电网公司 | Power grid time synchronization system |
| CN104734338A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Clock monitoring method, device and system of transformer substations |
| CN104199281A (en) * | 2014-09-04 | 2014-12-10 | 首钢京唐钢铁联合有限责任公司 | Time alignment system based on GPS (global position system) and compass system |
| CN104199281B (en) * | 2014-09-04 | 2017-06-16 | 首钢京唐钢铁联合有限责任公司 | System during a kind of energy pair based on GPS and dipper system |
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