CN105301951A - Multi-source decision realization method of time synchronization system based on analytic hierarchy method - Google Patents
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Abstract
The invention discloses a multi-source decision realization method of a time synchronization system based on an analytic hierarchy method. According to the multi-source decision realization method, validity, time quality and second pulse phases of all external Beidous, GPSs and ground time sources can be monitored in real time, two of various paths of time source information are then contrasted, in combination with initial weight, a determination matrix is established synchronously, normalization processing on the determination matrix is further carried out, actual dynamic weight of each external time source at each second is dynamically calculated, a final reference phase of a local second pulse can be further calculated, a synchronization source is determined, a participation degree of each path of time sources in a generation process of the synchronization source is reduced, selecting a present time source with time quality worse than time qualities of some or all external effective time sources can be effectively prevented, moreover, a problem of great jump of a local clock second pulse phase caused by hard time source switching can be solved.
Description
Technical Field
The invention relates to an electric power automation technology, in particular to a multisource judgment implementation method of a time synchronization system based on an analytic hierarchy process.
Background
The time synchronization management at the dispatching end and the substation end of the power system takes the time service of the space base as the main part and the time service of the foundation as the auxiliary part to form a clock synchronization system with mutual backup between the space and the ground, the time service of the space base adopts a one-way time service mode taking the time service of the Beidou satellite as the main part and the time service of the Global Positioning System (GPS) as the auxiliary part, and the time service of the foundation adopts a time service mode taking the time service of the local clock as the main part and the synchronous network resource of the communication system as the auxiliary part. The functional part of the time synchronization system of the power system mainly comprises a receiving unit, a clock unit and an output unit, after the receiving unit receives an external time reference signal, the clock unit selects an optimal external time reference signal as a synchronization source according to a multi-time source state judgment and selection mechanism, a clock is pulled into a tracking locking state and compensates transmission delay, a master/slave clock device is responsible for receiving multi-path time service signals, a time keeping module is matched to realize the selection switching of the signals, the signals are coded into various power synchronization codes, and finally the power synchronization codes are output through various electric drive interfaces. The time synchronization device of the power system has the characteristics of multiple time service source redundancy, high time keeping performance and power supply redundancy.
However, most of the time synchronization systems in the power transmission and transmission system adopt a multi-time source selection method based on preset priorities to realize multi-time source time service, the time synchronization system detects the effectiveness of all external time source signals in real time, then selects an effective external time source with the highest priority as a synchronization source of a local clock, and selects one effective external time source with the highest priority as a new synchronization source from the rest effective external time sources when the current synchronization source signal fails; when a time source recovers from failure to be valid, if the priority of the time source is higher than that of the current synchronization source, the time source is set as the current synchronization source. At this time, the clock is controlled by an external time reference signal, and outputs a time synchronization signal and time information synchronized therewith. The traditional multi-time source switching method with the preset priority belongs to rigid switching, the time quality of the current time source possibly selected is poor or worst in all effective external time sources, and a source tracing strategy with Beidou first and GPS auxiliary is difficult to realize.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a multi-source judgment implementation method of a time synchronization system based on an analytic hierarchy process aiming at the defects of the prior art, and solves the problem that the second pulse phase of a local clock generates large-amplitude jump due to hard switching of a time source; the occurrence of the situation that the time quality of the selected current time source is poor or worst in all the effective external time sources is effectively avoided.
In order to realize the aim of the invention, the invention provides a multisource judgment realization method of a time synchronization system based on an analytic hierarchy process, which comprises the following steps:
the method comprises the steps of firstly, receiving a Beidou satellite, a GPS time source and a ground time source;
secondly, receiving and resolving messages of the Beidou and the GPS time source; b code of the ground time source is received and decoded;
thirdly, judging the validity of the Beidou and GPS time source messages, judging whether the message header is correct, whether error codes exist or not and whether the message header conforms to the message rule, if so, entering the next step, and if so, returning to the second step; judging the validity of the ground time source, judging whether the check code is correct or not and whether the check code accords with a code source rule or not, if so, entering the next step, and if not, returning to the second step;
fourthly, judging the time quality correctness of the Beidou, the GPS time source and the ground time source, judging whether the satellite number of the Beidou and the GPS time source meets the requirement that the satellite number is more than or equal to 4, if so, entering the next step, and if not, returning to the second step; judging whether the big dipper, the GPS time source and the ground time source are continuous year, month, day, hour, minute and second, if yes, entering the next step, and if not, returning to the second step;
fifthly, judging the effectiveness of the phases of the second pulses of the Beidou, the GPS time source and the ground time source, calculating the phase error of the second pulses of the time source, and when the phase error is greater than a preset threshold value N, judging that the reliability of the phases of the second pulses of the Beidou, the GPS time source and the ground time source is 0, judging that the second step is invalid, returning to the second step, and if the second step is effective, entering the next step;
sixthly, filtering the pulse per second phase, comparing the phase difference information of the pulse per second of the Beidou, the GPS time source and the ground time source in pairs according to the effectiveness of the Beidou, the GPS time source and the ground time source,combining the initial weight to establish a corresponding judgment matrixWherein,pi，pjin order to be the initial weight, the weight is,for the phase difference, it is preset that the Beidou time source state information is represented when i is equal to 1, the GPS time source state information is represented when i is equal to 2, the ground time source state information is represented when i is equal to 3, and an initial weight P is preset1＝5，P2＝3，P3＝1；
Seventhly, calculating and judging geometric mean of Beidou, GPS time source and ground time source in matrixReuse of normalization formulaCarrying out normalization processing on the judgment matrix, and dynamically calculating the actual dynamic weight of each second of Beidou, a GPS time source and a ground time source;
and eighthly, performing comprehensive calculation according to the dynamic weights of the Beidou, the GPS time source and the ground time source to obtain the final synchronous source reference phase of the local pulse per second.
Further, in the fifth step, the threshold N is 5 us.
Furthermore, the Beidou module and the GPS module which are independent or the dual-mode tightly coupled are adopted for receiving the wireless time service signals of the Beidou and the GPS time sources; and the receiving ground time source wired time service signal adopts multimode optical fiber to input the optical B code.
Furthermore, the time synchronization system comprises a receiving unit, a clock unit and an output unit, wherein the receiving unit receives a wireless time reference signal as an external time reference through a Beidou module and a GPS module, receives a wired time reference signal as an external time reference through a B code module, and obtains an external time signal as the input of the clock unit after resolving and decoding; the clock unit is responsible for carrying out multi-source judgment on the external time signal received by the receiving unit to generate dynamic priority, then carrying out comprehensive calculation on an external time reference signal to determine a synchronous source phase, carrying out clock source switching control, and determining whether to lead a local clock into a tracking locking state or to be in a time-keeping state according to whether the clock is synchronous or not, wherein if external Beidou, a GPS time source and a ground time source are all invalid, a high-performance crystal oscillator ensures that a time synchronization system enters the time-keeping state; and the output unit is responsible for converting the basic time frequency information in the clock into the time synchronization code required by the engineering system.
The multisource judgment implementation method of the time synchronization system based on the analytic hierarchy process achieves the following beneficial effects:
1. the method strictly follows the national traceability strategy of 'space-based time service as a main part, foundation time service as an auxiliary part, Beidou satellite as a main part and GPS as an auxiliary part', and stipulates that the weight of Beidou time source time service at any moment must be greater than the weight of GPS time source time service, and the weight of space-based time service must be greater than the weight of foundation time service, so that the participation degree of each path of time source in the synchronous source generation process is reduced.
2. The problem that the second pulse phase of the local clock jumps greatly due to the hard switching of the time source of the time synchronization system is solved, and the condition that the time quality of the current time source selected by the time synchronization system is poor or worst in all effective external time sources is avoided.
Drawings
FIG. 1 is a flow chart of a method for multi-source decision for an analytic hierarchy process based time synchronization management system of the present invention;
fig. 2 is a basic composition diagram of the time synchronization system of the present invention.
Detailed Description
The present invention is further illustrated by the following detailed description in conjunction with the accompanying drawings, it being understood that the following detailed description is illustrative of the invention only and is not intended to limit the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which will occur to those skilled in the art upon reading the present specification.
Referring to fig. 1, the present invention provides a multi-source decision implementation method for a time synchronization system based on an analytic hierarchy process, the method includes the following steps:
the method comprises the steps of firstly, receiving a Beidou satellite, a GPS time source and a ground time source;
secondly, receiving and resolving messages of the Beidou and the GPS time source; b code of the ground time source is received and decoded;
thirdly, judging the validity of the Beidou and GPS time source messages, judging whether the message header is correct, whether error codes exist or not and whether the message header conforms to the message rule, if so, entering the next step, and if so, returning to the second step; judging the validity of the ground time source, judging whether the check code is correct or not and whether the check code accords with a code source rule or not, if so, entering the next step, and if not, returning to the second step;
fourthly, judging the time quality correctness of the Beidou, the GPS time source and the ground time source, judging whether the satellite number of the Beidou and the GPS time source meets the requirement that the satellite number is more than or equal to 4, if so, entering the next step, and if not, returning to the second step; judging whether the big dipper, the GPS time source and the ground time source are continuous year, month, day, hour, minute and second, if yes, entering the next step, and if not, returning to the second step;
fifthly, judging the phase validity of second pulses of the Beidou, the GPS time source and the ground time source, calculating the phase error of the second pulses of the time source, and when the phase error is larger than a preset threshold value N, preferably N is 5us, considering that the phase reliability of the second pulses of the Beidou, the GPS time source and the ground time source is 0, judging that the second pulse is invalid, returning to the second step, and if the second pulse is valid, entering the next step;
sixthly, filtering the pulse per second phase, comparing the phase difference information of the pulse per second of the Beidou, the GPS time source and the ground time source in pairs according to the effectiveness of the Beidou, the GPS time source and the ground time source, and establishing a corresponding judgment matrix by combining the initial weightWherein,pi，pjin order to be the initial weight, the weight is,for the phase difference, it is preset that the Beidou time source state information is represented when i is equal to 1, the GPS time source state information is represented when i is equal to 2, the ground time source state information is represented when i is equal to 3, and an initial weight P is preset1＝5，P2＝3，P3＝1；
Seventhly, calculating and judging geometric mean of Beidou, GPS time source and ground time source in matrixReuse of normalization formulaCarrying out normalization processing on the judgment matrix, and dynamically calculating the actual dynamic weight of each second of Beidou, a GPS time source and a ground time source;
and eighthly, performing comprehensive calculation according to the dynamic weights of the Beidou, the GPS time source and the ground time source to obtain the final synchronous source reference phase of the local pulse per second.
The Beidou satellite and GPS time source wireless time service signals are received by adopting an independent Beidou module and a GPS module or a dual-mode tightly coupled Beidou module and a GPS module; and receiving a ground time source wired time service signal, and inputting an optical B code by adopting a multimode optical fiber.
The multisource judgment implementation method of the time synchronization system based on the analytic hierarchy process can monitor the effectiveness, time quality and pulse per second phase of all external time sources in real time, then compares the information of each path of time source pairwise, combines with initial weight, synchronously establishes a judgment matrix, normalizes the judgment matrix, dynamically calculates the actual dynamic weight of each external time source per second, further calculates the final reference phase of local pulse per second, determines the synchronization source, reduces the participation degree of each path of time source in the generation process of the synchronization source, and effectively avoids the occurrence of the condition that the time quality of the selected current time source is poor or worst in all effective external time sources; meanwhile, the problem that the phase of the second pulse of the local clock jumps greatly due to the hard switching of the time source is solved.
Referring to fig. 2, correspondingly, the time synchronization system of the multi-source decision implementation method of the time synchronization system based on the analytic hierarchy process includes a receiving unit, a clock unit and an output unit, wherein the receiving unit receives a wireless time reference signal as an external time reference through a big dipper module and a GPS module, receives a wired time reference signal as an external time reference through a B-code module, and obtains an external time signal as an input of the clock unit after resolving and decoding; the clock unit is responsible for carrying out multi-source judgment on the external time signal received by the receiving unit to generate dynamic priority, then carrying out comprehensive calculation on the external time reference signal to determine the phase of a synchronous source, carrying out clock source switching control, and determining whether to lead a local clock into a tracking locking state or to be in a timekeeping state according to whether the clock is synchronous or not, wherein if external Beidou, a GPS time source and a ground time source are all invalid, the high-performance crystal oscillator ensures that the time synchronization system enters the timekeeping state; the output unit is responsible for converting the basic time frequency information in the clock into the time synchronization code required by the engineering system.
Claims (4)
1. A multi-source judgment realization method of a time synchronization system based on an analytic hierarchy process is characterized in that: the method comprises the following steps:
the method comprises the steps of firstly, receiving a Beidou satellite, a GPS time source and a ground time source;
secondly, receiving and resolving messages of the Beidou and the GPS time source; b code of the ground time source is received and decoded;
thirdly, judging the validity of the Beidou and GPS time source messages, judging whether the message header is correct, whether error codes exist or not and whether the message header conforms to the message rule, if so, entering the next step, and if so, returning to the second step; judging the validity of the ground time source, judging whether the check code is correct or not and whether the check code accords with a code source rule or not, if so, entering the next step, and if not, returning to the second step;
fourthly, judging the time quality correctness of the Beidou, the GPS time source and the ground time source, judging whether the satellite number of the Beidou and the GPS time source meets the requirement that the satellite number is more than or equal to 4, if so, entering the next step, and if not, returning to the second step; judging whether the big dipper, the GPS time source and the ground time source are continuous year, month, day, hour, minute and second, if yes, entering the next step, and if not, returning to the second step;
fifthly, judging the effectiveness of the phases of the second pulses of the Beidou, the GPS time source and the ground time source, calculating the phase error of the second pulses of the time source, and when the phase error is greater than a preset threshold value N, judging that the reliability of the phases of the second pulses of the Beidou, the GPS time source and the ground time source is 0, judging that the second step is invalid, returning to the second step, and if the second step is effective, entering the next step;
sixthly, filtering the pulse per second phase, comparing the phase difference information of the pulse per second of the Beidou, the GPS time source and the ground time source in pairs according to the effectiveness of the Beidou, the GPS time source and the ground time source, and establishing a corresponding judgment matrix by combining the initial weightWherein,pi，pjin order to be the initial weight, the weight is, for the phase difference, the state information of the Beidou time source is preset when i is equal to 1, and the state information of the GPS time source is preset when i is equal to 2State information representing ground time source state information when i is 3, and presetting an initial weight P1＝5，P2＝3，P3＝1；
Seventhly, calculating and judging geometric mean of Beidou, GPS time source and ground time source in matrixReuse of normalization formulaCarrying out normalization processing on the judgment matrix, and dynamically calculating the actual dynamic weight of each second of Beidou, a GPS time source and a ground time source;
and eighthly, performing comprehensive calculation according to the dynamic weights of the Beidou, the GPS time source and the ground time source to obtain the final synchronous source reference phase of the local pulse per second.
2. The method of claim 1 for implementing multi-source decision for an analytic hierarchy process based time synchronization system, wherein: in the fifth step, the threshold value N is 5 us.
3. The method of claim 1 for implementing multi-source decision for an analytic hierarchy process based time synchronization system, wherein: the Beidou satellite and GPS time source wireless time service signals are received by adopting an independent Beidou module and a GPS module or a dual-mode tightly-coupled Beidou module and a GPS module; and the receiving ground time source wired time service signal adopts multimode optical fiber to input the optical B code.
4. The method of claim 1 for implementing multi-source decision for an analytic hierarchy process based time synchronization system, wherein: the time synchronization system comprises a receiving unit, a clock unit and an output unit,
the receiving unit receives a wireless time reference signal as an external time reference through the Beidou module and the GPS module, receives a wired time reference signal as an external time reference through the B code module, and obtains an external time signal as the input of the clock unit after resolving and decoding;
the clock unit is responsible for carrying out multi-source judgment on the external time signal received by the receiving unit to generate dynamic priority, then carrying out comprehensive calculation on an external time reference signal to determine a synchronous source phase, carrying out clock source switching control, and determining whether to lead a local clock into a tracking locking state or to be in a time-keeping state according to whether the clock is synchronous or not, wherein if external Beidou, a GPS time source and a ground time source are all invalid, a high-performance crystal oscillator ensures that a time synchronization system enters the time-keeping state;
and the output unit is responsible for converting the basic time frequency information in the clock into the time synchronization code required by the engineering system.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788846A (en) * | 2016-12-27 | 2017-05-31 | 天津七六四通信导航技术有限公司 | A kind of multi-source logic switch time service module and changing method based on ARM |
| CN106788838A (en) * | 2016-11-18 | 2017-05-31 | 中国电力科学研究院 | A kind of system and method for Power time synchronization system robust control |
| CN107947886A (en) * | 2017-11-24 | 2018-04-20 | 上海机电工程研究所 | System calibration method based on time-code and quasi- second |
| CN109983811A (en) * | 2016-11-30 | 2019-07-05 | 华为技术有限公司 | A kind of error correcting method synchronization time and equipment |
| CN110782709A (en) * | 2019-11-04 | 2020-02-11 | 四川九洲空管科技有限责任公司 | High-precision clock redundancy backup method for civil aviation ADS-B ground station system |
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| CN114727379A (en) * | 2021-01-04 | 2022-07-08 | 华为技术有限公司 | Synchronization method, synchronization device, storage medium and equipment |
| CN115499082A (en) * | 2022-11-08 | 2022-12-20 | 电信科学技术第五研究所有限公司 | Comprehensive source selection method based on multi-time source fusion |
| CN118138180A (en) * | 2024-03-05 | 2024-06-04 | 国网安徽省电力有限公司滁州供电公司 | High-precision time synchronization method under new energy grid connection |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009544A (en) * | 2006-01-27 | 2007-08-01 | 大唐移动通信设备有限公司 | System and method of automatic phase-locking tracking clock synchronization |
| CN102023567A (en) * | 2010-10-21 | 2011-04-20 | 国网电力科学研究院 | High-precision time service method for multi-time-source comprehensive calculation |
| CN103823361A (en) * | 2014-02-26 | 2014-05-28 | 中国能源建设集团广东省电力设计研究院 | Multi-source dynamic self-adaptation clock synchronization method and device |
| CN103906220A (en) * | 2012-12-24 | 2014-07-02 | 中国移动通信集团河北有限公司 | Server timing method and system, and GPS cloud management server |
| US20150022395A1 (en) * | 2013-07-16 | 2015-01-22 | O2Micro Inc. | Method and receiver for determining system time of a navigation system |
| CN104375414A (en) * | 2014-11-14 | 2015-02-25 | 国家电网公司 | Time consuming device time service method and device based on multiple time sources |
-
2015
- 2015-09-29 CN CN201510631551.2A patent/CN105301951B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009544A (en) * | 2006-01-27 | 2007-08-01 | 大唐移动通信设备有限公司 | System and method of automatic phase-locking tracking clock synchronization |
| CN102023567A (en) * | 2010-10-21 | 2011-04-20 | 国网电力科学研究院 | High-precision time service method for multi-time-source comprehensive calculation |
| CN103906220A (en) * | 2012-12-24 | 2014-07-02 | 中国移动通信集团河北有限公司 | Server timing method and system, and GPS cloud management server |
| US20150022395A1 (en) * | 2013-07-16 | 2015-01-22 | O2Micro Inc. | Method and receiver for determining system time of a navigation system |
| CN103823361A (en) * | 2014-02-26 | 2014-05-28 | 中国能源建设集团广东省电力设计研究院 | Multi-source dynamic self-adaptation clock synchronization method and device |
| CN104375414A (en) * | 2014-11-14 | 2015-02-25 | 国家电网公司 | Time consuming device time service method and device based on multiple time sources |
Non-Patent Citations (2)
| Title |
|---|
| 张柯等: "变电站自动化系统时钟同步方式", 《农村电气化》 * |
| 杜雪涛等: "北斗与GPS双授时在TD-SCDMA中的应用", 《电信工程技术与标准化》 * |
Cited By (25)
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|---|---|---|---|---|
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| CN106788846A (en) * | 2016-12-27 | 2017-05-31 | 天津七六四通信导航技术有限公司 | A kind of multi-source logic switch time service module and changing method based on ARM |
| CN107947886A (en) * | 2017-11-24 | 2018-04-20 | 上海机电工程研究所 | System calibration method based on time-code and quasi- second |
| CN107947886B (en) * | 2017-11-24 | 2019-08-23 | 上海机电工程研究所 | System calibration method based on time-code and quasi- second |
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