CN114039714B - Multi-clock source cooperative time synchronization system and time synchronization method thereof - Google Patents
Multi-clock source cooperative time synchronization system and time synchronization method thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0008—Synchronisation information channels, e.g. clock distribution lines
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- H—ELECTRICITY
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Abstract
The invention discloses a multi-clock source cooperative time setting system and a time setting method thereof, wherein the system comprises the following steps: the clock sources are used for providing time signals and timing the remote active/standby machines in the station; the remote host is used for coordinating the clock source to the remote active/standby device time synchronization in the station and simultaneously to the secondary device time synchronization in the station according to the strategy; and the remote host computer performs clock information interaction with the remote host computer, and pairs secondary equipment in the station according to the information. The method comprises the following steps: providing a unified time signal to secondary devices in the station; and coordinating the time signal with secondary equipment in the station to perform unified time synchronization. The invention provides a multi-clock source cooperative time synchronization system and a time synchronization method thereof. The invention improves the original equipment in the station without adding additional equipment, thereby reducing the construction cost and maintenance difficulty of the transformer substation.
Description
Technical Field
The invention relates to the technical field of time synchronization of power grid systems, in particular to a multi-clock source cooperative time synchronization system and a time synchronization method thereof.
Background
The power grid system is a time-related system, current and voltage waveforms describing the transient process of the power grid are needed for the operation and accident systematic analysis of the power grid, the time of action time sequences of a breaker and a protection device is needed, the time sequences of various events play a decisive role in the operation or fault analysis process of the power grid, and meanwhile, the time synchronization technology of the whole station is also one of key technologies of the stable operation of an intelligent transformer substation and even an intelligent power grid. The secondary system of the intelligent substation generally comprises electronic transformers, merging units, switches, protection measurement and control equipment and the like. The devices must operate based on a unified time reference, and can meet the requirements of event sequence recording (SOE), fault recording and real-time data acquisition time consistency, so as to ensure the accuracy of line fault ranging, phasor and attack angle dynamic monitoring and unit and power grid parameter verification. These requirements place stringent demands on the clock synchronization system of the intelligent substation.
At present, the network topology of a time synchronization system in most intelligent substations is shown in fig. 3, the time synchronization system only provides one clock source device, and the clock source provides a unified time synchronization mode for time synchronization of secondary devices in the station. However, once the unique clock source communication is lost, the clock out-of-step condition occurs, the risk of time disorder of secondary equipment is increased, the reliability of a clock synchronization system is reduced, and the operation of a power grid is seriously influenced. And clock source equipment is required to be purchased independently, so that the construction cost is increased.
Disclosure of Invention
Therefore, an object of the embodiments of the present invention is to provide a multi-clock source cooperative time synchronization system and a time synchronization method thereof, by modifying remote devices in a transformer substation, a plurality of remote devices cooperate with each other, so that the time synchronization of secondary devices in the transformer substation is improved on the basis of original devices in the transformer substation, no additional devices are required to be added, and the construction cost and maintenance difficulty of the transformer substation are reduced.
In a first aspect, an embodiment of the present invention provides a multi-clock source cooperative time synchronization system, including:
And the clock sources are used for providing time signals and timing the remote active/standby machines in the station.
And the remote host is used for coordinating the clock source to the remote active/standby machine time synchronization and simultaneously synchronizing the secondary equipment in the station according to the strategy.
And the remote host computer performs clock information interaction with the remote host computer, and pairs secondary equipment in the station according to the information.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the remote host includes:
the clock signal receiving units are respectively corresponding to the clock sources and are used for receiving the clock signals of the clock sources.
The clock signal output units are used for providing various time setting modes for secondary equipment in the station.
And the receiving unit priority ordering module is used for configuring the priority of each clock signal receiving unit.
And the output unit priority ordering module is used for configuring the priority of each clock signal output unit.
The clock signal management module is used for enabling/disabling the clock signal receiving unit and the clock signal output unit according to the strategy.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the receiving unit prioritization module includes:
The judging unit is used for sequentially judging the signal valid state of each clock signal receiving unit in the sequencing table according to a preset configuration strategy.
And the enabling unit is used for enabling the current signal if the signal of the current clock signal receiving unit is valid, disabling other clock signal receiving units in the ordered list, and otherwise disabling the current clock signal receiving unit.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the output unit prioritization module includes:
And selecting the corresponding clock source with the highest priority from a plurality of clock signal receiving units.
If there are a plurality of clock sources corresponding to the selection, the signal quality is selected to be the best among a plurality of devices.
If there are a plurality of clock sources with the best signal quality, one of the clock sources is selected randomly.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the clock signal management module includes:
And the transmission unit is used for carrying out mutual transmission of the clock signal quality messages of the clock signal receiving unit between the remote host and the remote slave according to a preset period.
And the detection unit is used for regularly detecting the enabling state of each clock signal receiving unit of the remote active/standby machine according to a preset strategy and period. On the one hand, the remote host enables the corresponding clock signal of the host according to the enabling state, and synchronizes the time of the host. On the other hand, the remote host sends a message to the remote standby, and the remote standby selects a clock source and synchronizes the local time.
The remote host computer is used for calculating the enabling states of the clock signal output units of the remote devices according to the enabling strategy of the clock signal output units, sending messages to the local and remote standby computers, and the remote host/standby computers regularly detect the enabling states of each received clock signal output unit according to a preset period and select the corresponding local clock signal output unit to output according to the enabling or disabling messages.
In a second aspect, an embodiment of the present invention further provides a time synchronization method using the aforementioned multi-clock source cooperative time synchronization system, where the time synchronization method includes:
And providing a unified time signal to secondary devices in the station.
And coordinating the time signal with secondary equipment in the station to perform unified time synchronization.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the coordinating the time signal with the secondary device in the station, performing unified pairing includes:
local time of the remote active/standby machine is synchronized.
Providing multiple means of time synchronization to secondary devices within the station.
The priority of the received clock signal is configured.
The priority of the clock signal output is configured.
The local system time is synchronized.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the configuring the priority of the received clock signal includes:
And judging the valid state of each received clock signal in the sequencing table in sequence according to a preset configuration strategy.
If the current received clock signal is valid, the current signal is enabled to enable other received clock signals in the ordered list, otherwise, the current received clock signal is enabled.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where the configuring the priority of the clock signal output includes:
the corresponding clock source with the highest priority is selected from the plurality of received clock signals.
If there are a plurality of clock sources corresponding to the selection, the signal quality is selected to be the best among a plurality of devices.
If there are a plurality of clock sources with the best signal quality, one of the clock sources is selected randomly.
With reference to the second aspect, an embodiment of the present invention provides a fourth possible implementation manner of the second aspect, where the synchronizing the local system time includes:
The remote host transmits a clock signal quality message of the clock signal to the remote host according to a preset period.
And detecting the enabling state of each received clock signal of the remote active/standby machine at fixed time according to a preset period and strategy. On one hand, the remote host synchronizes the local time according to the enabling state, and on the other hand, the remote host sends a message to the remote standby according to the enabling state, and the remote standby selects a clock source and synchronizes the local time.
And the remote host calculates the enabling state of the remote master/slave clock signal output unit according to the enabling strategy of the clock signal and the clock quality of the remote master/slave. On one hand, the remote host controls the local clock signal output unit according to the enabling state, and on the other hand, the remote host sends a message to the remote standby machine, and the remote standby machine selects and outputs the corresponding local clock signal according to the enabling or disabling message.
The embodiment of the invention has the beneficial effects that:
The invention provides a multi-clock source cooperative time synchronization system and a time synchronization method thereof. The invention improves the original equipment in the station without adding additional equipment, thereby reducing the construction cost and maintenance difficulty of the transformer substation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an internal module structure of a multi-clock source cooperative time synchronization system according to the present invention;
FIG. 2 is a schematic diagram of a network topology of the multi-clock source cooperative time synchronization system of the present invention;
Fig. 3 is a schematic diagram of a network topology of a source-to-time system of a transformer substation Shan Shizhong in the prior art.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Referring to fig. 1 to 2, a first embodiment of the present invention provides a multi-clock source cooperative time synchronization system, which includes:
And the clock sources are used for providing time signals and timing the remote active/standby machines in the station.
And the remote host is used for coordinating the clock source to the remote active/standby machine time synchronization and simultaneously synchronizing the secondary equipment in the station according to the strategy.
And the remote host computer performs clock information interaction with the remote host computer, and pairs secondary equipment in the station according to the information.
Wherein, the tele-host comprises:
the clock signal receiving units are respectively corresponding to the clock sources and used for receiving clock signals of the clock sources and can transmit GPS, beidou, IRIG-B codes, upper-level PTP, sntp, IEC, IEC104 and IEC61850 signals.
The clock signal output units are used for providing various time setting modes for secondary equipment in the station, including IRIG-B codes, PTP, sntp, IEC, IEC104 and IEC61850 signals.
And the receiving unit priority ordering module is used for configuring the priority of each clock signal receiving unit.
And the output unit priority ordering module is used for configuring the priority of each clock signal output unit.
The clock signal management module is used for enabling/disabling the clock signal receiving unit and the clock signal output unit according to the strategy.
Wherein the receiving unit prioritization module comprises:
The judging unit is used for sequentially judging the signal valid state of each clock signal receiving unit in the sequencing table according to a preset configuration strategy.
And the enabling unit is used for enabling the current signal if the signal of the current clock signal receiving unit is valid, disabling other clock signal receiving units in the ordered list, and otherwise disabling the current clock signal receiving unit.
Wherein the output unit prioritization module comprises:
And selecting the corresponding clock source with the highest priority from a plurality of clock signal receiving units.
If there are a plurality of clock sources corresponding to the selection, the signal quality is selected to be the best among a plurality of devices.
If there are a plurality of clock sources with the best signal quality, one of the clock sources is selected randomly.
Wherein the clock signal management module comprises:
And the transmission unit is used for carrying out mutual transmission of the clock signal quality messages of the clock signal receiving unit between the remote host and the remote slave according to a preset period.
And the detection unit is used for regularly detecting the enabling state of each clock signal receiving unit of the remote active/standby machine according to a preset strategy and period. On one hand, the remote host selects corresponding clock source to synchronize the local time according to the enabling state, and on the other hand, the remote host sends a message to the remote standby, and the remote standby selects the clock source to synchronize the local time.
The computing unit is used for the remote host to compute the enabling state of the clock signal output units of each remote device according to the enabling strategy of the clock signal output units, and send messages to the remote host and the mobile standby, and the remote host/standby detects the enabling state of each received clock signal output unit at regular time according to a preset period and selects the corresponding local clock signal output unit for outputting according to the enabling or disabling messages.
A second embodiment of the present invention provides a time synchronization method using a multi-clock source cooperative time synchronization system as described above, including:
And providing a unified time signal to secondary devices in the station.
And coordinating the time signal with secondary equipment in the station to perform unified time synchronization.
Wherein, the coordination time signal and the secondary equipment in the station perform unified time synchronization, which comprises:
local time of the remote active/standby machine is synchronized.
Providing multiple means of time synchronization to secondary devices within the station.
The priority of the received clock signal is configured.
The priority of the clock signal output is configured.
The local system time is synchronized.
Wherein the configuring the priority of the received clock signal includes:
And judging the valid state of each received clock signal in the sequencing table in sequence according to a preset configuration strategy.
If the current received clock signal is valid, the current signal is enabled to enable other received clock signals in the ordered list, otherwise, the current received clock signal is enabled.
Wherein the priority of the configuration clock signal output includes:
the corresponding clock source with the highest priority is selected from the plurality of received clock signals.
If there are a plurality of clock sources corresponding to the selection, the signal quality is selected to be the best among a plurality of devices.
If there are a plurality of clock sources with the best signal quality, one of the clock sources is selected randomly.
Wherein the synchronizing the local system time comprises:
The remote host transmits a clock signal quality message of the clock signal to the remote host according to a preset period.
And detecting the enabling state of each received clock signal of the remote active/standby machine at fixed time according to a preset period and strategy. On one hand, the remote host synchronizes the local time according to the enabling state, and on the other hand, the remote host sends a message to the remote standby according to the enabling state, and the remote standby selects a clock source and synchronizes the local time.
And the remote host calculates the enabling state of the remote master/slave clock signal output unit according to the enabling strategy of the clock signal and the clock quality of the remote master/slave. On one hand, the remote host controls the local clock signal output unit according to the enabling state, and on the other hand, the remote host sends a message to the remote standby machine, and the remote standby machine selects and outputs the corresponding local clock signal according to the enabling or disabling message.
The embodiment of the invention aims to protect a multi-clock source collaborative time synchronization system and a time synchronization method thereof, and has the following effects:
The invention provides a multi-clock source cooperative time synchronization system and a time synchronization method thereof. The invention improves the original equipment in the station without adding additional equipment, thereby reducing the construction cost and maintenance difficulty of the transformer substation.
The computer program product of the multi-clock source collaborative timing method and apparatus provided in the embodiments of the present invention includes a computer readable storage medium storing program codes, and instructions included in the program codes may be used to execute the method in the foregoing method embodiment, and specific implementation may refer to the method embodiment and will not be described herein.
Specifically, the storage medium can be a general storage medium, such as a mobile disk, a hard disk, and the like, and when the computer program on the storage medium is executed, the method for synchronizing the time by the multi-clock source coordination can be executed, so that a plurality of remote devices can cooperate with each other to synchronize the time for secondary devices in the transformer substation.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A multi-clock source cooperative time tick system, comprising:
The clock sources are used for providing time signals and timing the remote active/standby machines in the station;
The remote host is used for coordinating the clock source to pair the remote active/standby machine in the station and to pair the secondary equipment in the station at the same time;
the remote host computer performs clock information interaction with the remote host computer, and pairs secondary equipment in the station according to the information;
the tele-host comprises:
The clock signal receiving units are respectively corresponding to the clock sources and are used for receiving clock signals of the clock sources;
the clock signal output units are used for providing a plurality of time setting modes for secondary equipment in the station;
A receiving unit priority ordering module, configured to configure the priority of each clock signal receiving unit;
An output unit priority ordering module, configured to configure the priority of each clock signal output unit;
A clock signal management module enabling/disabling the clock signal receiving unit and the clock signal output unit according to a policy;
The clock signal management module includes:
The transmission unit is used for carrying out mutual transmission of clock signal quality messages of the clock signal receiving unit between the remote host and the remote standby according to a preset period;
The detection unit is used for detecting the enabling state of each clock signal receiving unit received by the remote master/slave machine at regular time according to a preset strategy and period, and synchronizing the local time of the remote master/slave machine according to the enabling state;
The remote host computer is used for calculating the enabling state of the clock signal output units of each remote device according to the enabling strategy of the clock signal output units, controlling the output of the local clock signal output unit according to the enabling state, sending a message to the remote standby computer, detecting the enabling state of each received clock signal output unit at regular time according to a preset period, and controlling the output of the local clock signal output unit according to the enabling or disabling message.
2. The multiple clock source co-time synchronization system of claim 1, wherein the receive unit prioritization module comprises:
The judging unit is used for sequentially judging the signal valid state of each clock signal receiving unit in the sequencing table according to a preset configuration strategy;
and the enabling unit is used for enabling the current signal if the signal of the current clock signal receiving unit is valid, disabling other clock signal receiving units in the ordered list, and otherwise disabling the current clock signal receiving unit.
3. The multiple clock source coordinated time system of claim 1, wherein the output unit prioritization module comprises:
selecting a corresponding clock source with highest priority from a plurality of clock signal receiving units;
If the selected corresponding clock sources are multiple, selecting the clock source with the best signal quality from the multiple clock sources;
If there are a plurality of clock sources with the best signal quality, one of the clock sources is selected randomly.
4. A time synchronization method using the multi-clock source cooperative time synchronization system as claimed in any one of claims 1 to 3, comprising:
Providing a unified time signal to secondary devices in the station;
and coordinating the time signal with secondary equipment in the station to perform unified time synchronization.
5. The time synchronization method of claim 4, wherein the coordinating the time signal with the secondary device in the station for unified time synchronization comprises:
Synchronizing local time of the remote active/standby machine;
Providing a plurality of time setting modes for secondary equipment in the station;
configuring the priority of the received clock signal;
The priority of the clock signal output is configured.
6. The time tick of claim 5 in which the configuring the priority of the received clock signal comprises:
According to a preset configuration strategy, judging the effective state of each received clock signal in the sequencing table in sequence;
If the current received clock signal is valid, the current signal is enabled to enable other received clock signals in the ordered list, otherwise, the current received clock signal is enabled.
7. The time tick of claim 6 wherein configuring the priority of clock signal output comprises:
Selecting a corresponding clock source with the highest priority from a plurality of received clock signals;
If the selected corresponding clock sources are multiple, selecting the clock source with the best signal quality from the multiple clock sources;
If there are a plurality of clock sources with the best signal quality, one of the clock sources is selected randomly.
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