CN103576543A - Power grid time synchronization system - Google Patents
Power grid time synchronization system Download PDFInfo
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- CN103576543A CN103576543A CN201210269336.9A CN201210269336A CN103576543A CN 103576543 A CN103576543 A CN 103576543A CN 201210269336 A CN201210269336 A CN 201210269336A CN 103576543 A CN103576543 A CN 103576543A
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Abstract
The invention discloses a power grid time synchronization system. The synchronization system comprises a main clock, a time signal transmission channel and a time signal user device interface. The main clock comprises a time signal receiving unit, a time maintaining unit and a time signal output unit, wherein the time signal receiving unit is used for receiving external time reference signals; the time maintaining unit is used for synchronously keeping time according to the external time reference signals when receiving the external time reference signals and is used for keeping time at a preset punctuality accuracy when not receiving the external time reference signals; and the time signal output unit is used for outputting time synchronizing signals according to the external time reference signals when receiving the external time reference signals and is used for outputting the time synchronizing signals according to the time maintaining unit when not receiving the external time reference signals. Time service systems of every user device in a power system are identical through the power grid time synchronization system, the time synchronizing signals are generated through satellite time or ground time, and unity of time in the power system is achieved.
Description
Technical field
The present invention 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 meet the requirement to time synchronized of various systems and equipment, guarantee real-time data acquisition time consistency, improve the accuracy of line fault range finding, phasor and the kinetic measurement of merit angle, unit and electrical network parameter verification, thereby improve power grid accident analysis and the stable level of controlling, improve operation of power networks efficiency 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 electric system are (as dispatch automated system, energy management system, Style Product Information Management System and supervisory system etc.) and power equipment (as protective relaying device, intelligent electronic device, sequence of event SOE, plant stand automatic control equipment, safety and stability control device and fault filter etc.) time can not reach complete unity, there is no standby time dissemination system, aspect describing in the time, there is larger difference in each system, be difficult to accurate description time sequencing, brought certain difficulty to the analysis of electric network fault.
Time dissemination system for correlation technique Zhong Ge transformer station is separate, causes skimble-scamble problem of electric system time, not yet proposes at present effective solution.
Summary of the invention
Fundamental purpose of the present invention is to provide the synchro system of a kind of electrical network time, separate to solve the time dissemination system of each transformer station, causes skimble-scamble problem of electric system time.
To achieve these goals, according to an aspect of the present invention, provide the synchro system of a kind of electrical network time.
According to the synchro system of electrical network of the present invention time, comprise major clock, time signal transmission channel and time signal user device interface, wherein, major clock comprises: time signal receiving element, for receiving external time reference signal; Time holding unit, be connected with time signal receiving element, time holding unit is the clock of major clock inside, for when receiving external time reference signal, while synchronously walking according to external time reference signal, when not receiving external time reference signal, when the punctual accuracy that keeps predetermined is walked; And time signal output unit, be connected respectively with time holding unit with time signal receiving element, for when receiving external time reference signal, according to external time reference signal output time synchronizing signal, when not receiving external time reference signal, according to time holding unit output time synchronizing signal, wherein, time signal transmission channel is for transferring to subscriber equipment by the time signal output unit of time signal output unit output via time signal user device interface.
Further, time signal receiving element comprises: wireless time signal receiving unit, the time reference signal transmitting for receiving big-dipper satellite or gps satellite; And wired time signal receiving element, for receiving the time reference signal of higher level ground elapsed time source output.
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: signal designation unit, for when time signal receiving element receives external time reference signal, export the first condition indicative signal, when time signal receiving element does not receive 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, exchanges or direct supply for connecting, so that the working power of major clock to be provided.
Further, major clock also comprises: power supply indicating member, when normal for the working power at major clock, export the first power indication signal, 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 while walking for displaying time holding unit.
Further, time signal transmission channel comprises: concentric cable, have shielding control cables, voice communication cable or optical fiber.
Further, time signal output unit is by PTP, NTP, B code, pulse or frequency output time synchronizing signal.
Further, 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.
By the present invention, adopt the synchro system of the electrical network time that comprises following structure: major clock, time signal transmission channel and time signal user device interface, wherein, major clock comprises: for receiving the time signal receiving element of external time reference signal, as the clock time holding unit of major clock inside, when receiving external time reference signal, while synchronously walking according to external time reference signal, when not receiving external time reference signal, when the punctual accuracy that keeps predetermined is walked, and when receiving external time reference signal, according to external time reference signal output time synchronizing signal, when not receiving external time reference signal, according to the time signal output unit of time holding unit output time synchronizing signal, wherein, time signal transmission channel is for transferring to subscriber equipment by the time signal output unit of time signal output unit output via time signal user device interface, can make each subscriber equipment in electric system (is also each system in electric system, each power equipment) there is unified time dissemination system, the time dissemination system that solves Liao Ge transformer station is separate, cause skimble-scamble problem of electric system time, and then reached the effect of unified power system time.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the block diagram of the synchro system of the electrical network time of the embodiment of the present invention.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Fig. 1 is according to the block diagram of the synchro system of the electrical network time of the embodiment of the present invention, as shown in Figure 1, the synchro system of this electrical network time is arranged in dispatching center's (dispatching office), generating plant and transformer station, comprises major clock 20, time signal transmission channel 40 and time signal user device interface 60.
Wherein, major clock 20 carries high stable time reference, while walking with pre-determined accuracy, can receive external time reference signal, and can 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 for receiving external time reference signal.Preferably, time signal receiving element 22 comprises wireless time signal receiving unit and wired time signal receiving element, wherein, the time reference signal that wireless time signal receiving unit transmits for receiving the wireless means such as big-dipper satellite or gps satellite or shortwave broadcasting and TV; Wired time signal receiving element receives by wire or optical fiber the time reference signal that on the ground such as higher level transformer station or dispatching center, other major clocks send, its time reference signal is as the standby external time reference signal of major clock, when cannot obtain from overhead satellites time reference signal time, take ground elapsed time of upper level is time reference signal, thereby has 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, when receiving external time reference signal, synchronous by external time reference signal, while synchronously walking according to external time reference signal; When not receiving 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, have quartz crystal oscillator or the atomic frequency standard of temperature compensation.
Time signal output unit 26 is connected respectively with time holding unit 24 with time signal receiving element 22, when major clock 20 receives external time reference signal, according to external time reference signal output time synchronizing signal; When not receiving external time reference signal, according to internal clocking, be also the clock output time synchronizing signal of time holding unit 24, when external time reference signal receives recovery, automatically switch to normal condition work, should be less than 0.5s switching time.
Preferably, major clock 20 should be exported time synchronizing signal sufficient amount, dissimilar, for example pass through PTP, NTP, B code, pulse or frequency output time synchronizing signal, and, can meet by expansion time signal output unit 26 needs of different use occasions.
After 20 rise time of 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 electric system, wherein, time signal transmission channel 40 comprises concentric cable, has shielding control cables, voice communication cable or optical fiber, time signal user device interface 60, according to subscriber equipment needs, 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.
In the synchro system of the electrical network time providing at this embodiment, based on big-dipper satellite and GPS navigation system, realize power grid integrated time synchronized, 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 standby reference signal, by " world is standby mutually " technology and networking technology, build an integrated clock synchronization system that meets 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, make the time dissemination system of each transformer station same, and then reach electric system time unification.
Preferably, major clock also comprises: power supply unit, for connecting, exchange or direct supply, and so that the working power of major clock to be provided, wherein, Alternating Current Power Supply parameter is: 220V ± 20% (50Hz+/-1Hz), power consumption ﹤ 15W; Direct current supply parameter is: 110V ± 20% or 220V ± 20%, power consumption ﹤ 15W.
Further preferably, following duty indication is set on the housing face-plate of major clock: signal designation unit and power supply indicating member.Wherein, signal designation unit is for when time signal receiving element receives external time reference signal, export the first condition indicative signal, when time signal receiving element does not receive external time reference signal, export the second condition indicative signal, the first condition indicative signal and the second condition indicative signal are different signals; When power supply indicating member is normal for the working power at major clock, export the first power indication signal, 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 time signal receiving unit does not receive the second condition indicative signal of external time reference signal output, all can be set to 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 to produce audible alarm, the electrical interface type of alerting signal is preferably relay idle contact.
Preferably, major clock also comprises time display unit, and the temporal information while walking for displaying time holding unit in the time of showing, minute, second, can show date, i.e. year, month, day if desired.
Preferably, when building the electrical network clock synchronization system of whole electric system, first in power supply administration, dispose a major clock, receive the Big Dipper, gps satellite signal, receive simultaneously from upper level (such as: Guo Wang dispatching center) more senior clock to time signal, export high-precision, the stable time, offer the PTP time service service of next stage transformer station, with the converter of SDH, PTP signal is delivered on SDH basic routing line, 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 time service service to transformer station; adopt existing electric power data proprietary network simultaneously; by SDH mode, receive PTP temporal information from power supply administration to build the ground elapsed time synchronizing network in whole region, and the mode time service services such as PTP, NTP, B code, pulse or frequency are provided in station the systems such as telemechanical apparatus, protection equipment.Finally the transformer station's time synchronized major clock of configuration (built-in crystal oscillator) at 110KV provides time service service to transformer station; adopt existing electric power data proprietary network simultaneously; by SDH mode, receive PTP temporal information from power supply administration to build the ground elapsed time synchronizing network in whole region, and the mode time service services such as PTP, NTP, B code, pulse or frequency are provided in station the systems such as telemechanical apparatus, protection equipment.
Simultaneously monitoring management system in ， power supply administration config set, monitors each master-salve clock state in real time, 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 by timestamp, deviation and postpone input database, shows a plurality ofly from 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 and are analyzed by historical data base.
From above description, can find out, the present invention has realized following technique effect: when receiving external time reference signal, according to external time reference signal output time synchronizing signal, when not receiving external time reference signal, according to the clock output time synchronizing signal of major clock inside, time signal transmission channel transfers to subscriber equipment by this time signal output unit via time signal user device interface, make each subscriber equipment in electric system there is unified time dissemination system, and then unified the time in electric system.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the synchro system of electrical network time, is characterized in that, comprises major clock, time signal transmission channel and time signal user device interface, wherein,
Described major clock comprises:
Time signal receiving element, for receiving external time reference signal;
Time holding unit, be connected with described time signal receiving element, described time holding unit is the clock of described major clock inside, for when receiving described external time reference signal, while synchronously walking 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
Time signal output unit, be connected respectively with described time holding unit with described time signal receiving element, 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
Wherein, described time signal transmission channel is for transferring to subscriber equipment by the time signal output unit of described time signal output unit output 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:
Wireless time signal receiving unit, the time reference signal transmitting for receiving big-dipper satellite or gps satellite; And
Wired time signal receiving element, for receiving the time reference signal of higher level ground elapsed time source output.
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:
Signal designation unit, 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, exchanges or direct supply for connecting, 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:
Power supply indicating member, when normal for the working power at described major clock, export the first power indication signal, 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, the temporal information when showing that 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 shielding control cables, voice communication cable or optical fiber.
9. the synchro system of electrical network time according to claim 1, is characterized in that, described time signal output unit is exported described time synchronizing signal by PTP, NTP, B code, pulse or frequency.
10. 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237908A (en) * | 2014-09-02 | 2014-12-24 | 南京莱斯信息技术股份有限公司 | Time unification implementation method based on Beidou satellite navigation system |
| CN104678754A (en) * | 2015-03-25 | 2015-06-03 | 天津七六四通信导航技术有限公司 | Full-function type time synchronization system |
| CN110324157A (en) * | 2019-08-08 | 2019-10-11 | 北京佑仁天下网络科技有限公司 | A kind of multi-person speech chat system |
| CN110543093A (en) * | 2019-07-05 | 2019-12-06 | 齐鲁工业大学 | Power distribution terminal time synchronization method using power grid frequency value comparison |
| CN112327598A (en) * | 2020-11-06 | 2021-02-05 | 国网山东省电力公司信息通信公司 | IRIG-B code-based ground link time service test system and method for time synchronization device |
| CN113885020A (en) * | 2021-09-15 | 2022-01-04 | 万赛智能科技(苏州)有限公司 | Automatic driving data acquisition and fusion system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201812153U (en) * | 2010-09-09 | 2011-04-27 | 河北旭辉电气股份有限公司 | Precise time synchronizing device of digitalized transformer substation |
| CN102520609A (en) * | 2011-12-16 | 2012-06-27 | 四川省电力公司通信自动化中心 | Multifunctional electric power system time synchronization calibration instrument |
| CN202748611U (en) * | 2012-07-30 | 2013-02-20 | 国家电网公司 | Synchronization system for power network time |
-
2012
- 2012-07-30 CN CN201210269336.9A patent/CN103576543A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201812153U (en) * | 2010-09-09 | 2011-04-27 | 河北旭辉电气股份有限公司 | Precise time synchronizing device of digitalized transformer substation |
| CN102520609A (en) * | 2011-12-16 | 2012-06-27 | 四川省电力公司通信自动化中心 | Multifunctional electric power system time synchronization calibration instrument |
| CN202748611U (en) * | 2012-07-30 | 2013-02-20 | 国家电网公司 | Synchronization system for power network time |
Non-Patent Citations (5)
| Title |
|---|
| 刘晓明等: "变电站GPS时间同步系统的配置", 《内蒙古石油化工》, no. 4, 31 December 2010 (2010-12-31), pages 58 - 59 * |
| 王秋梅: "火力发电厂GPS时间同步系统的设计优化", 《科技广场》, 31 August 2010 (2010-08-31), pages 137 - 140 * |
| 葛惠珠等: "变电站GPS时间同步系统的配置", 《内蒙古电力技术》, vol. 26, no. 1, 31 December 2008 (2008-12-31) * |
| 陈贵军: "基于北斗和GPS授时系统的研制", 《中国优秀硕士学位论文全文数据库基础科学辑》, no. 07, 15 July 2012 (2012-07-15), pages 5 - 6 * |
| 高亮等: "几种典型时间同步方法的比较与应用", 《第二届中国卫星导航学术年会》, 31 December 2011 (2011-12-31), pages 1 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237908A (en) * | 2014-09-02 | 2014-12-24 | 南京莱斯信息技术股份有限公司 | Time unification implementation method based on Beidou satellite navigation system |
| CN104237908B (en) * | 2014-09-02 | 2017-01-11 | 南京莱斯信息技术股份有限公司 | Time unification implementation method based on Beidou satellite navigation system |
| CN104678754A (en) * | 2015-03-25 | 2015-06-03 | 天津七六四通信导航技术有限公司 | Full-function type time synchronization system |
| CN110543093A (en) * | 2019-07-05 | 2019-12-06 | 齐鲁工业大学 | Power distribution terminal time synchronization method using power grid frequency value comparison |
| CN110324157A (en) * | 2019-08-08 | 2019-10-11 | 北京佑仁天下网络科技有限公司 | A kind of multi-person speech chat system |
| CN112327598A (en) * | 2020-11-06 | 2021-02-05 | 国网山东省电力公司信息通信公司 | IRIG-B code-based ground link time service test system and method for time synchronization device |
| CN112327598B (en) * | 2020-11-06 | 2022-03-04 | 国网山东省电力公司信息通信公司 | IRIG-B code-based ground link time service test system and method for time synchronization device |
| CN113885020A (en) * | 2021-09-15 | 2022-01-04 | 万赛智能科技(苏州)有限公司 | Automatic driving data acquisition and fusion system and method |
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Application publication date: 20140212 |