WO2019205498A1 - 电能表的时钟同步方法、装置、计算机设备和存储介质 - Google Patents

电能表的时钟同步方法、装置、计算机设备和存储介质 Download PDF

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Publication number
WO2019205498A1
WO2019205498A1 PCT/CN2018/109166 CN2018109166W WO2019205498A1 WO 2019205498 A1 WO2019205498 A1 WO 2019205498A1 CN 2018109166 W CN2018109166 W CN 2018109166W WO 2019205498 A1 WO2019205498 A1 WO 2019205498A1
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WIPO (PCT)
Prior art keywords
time
message
electric energy
energy meter
calibration
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PCT/CN2018/109166
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English (en)
French (fr)
Inventor
孙颖
赵颖
苏志鹏
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广州供电局有限公司
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Priority to KR1020207015343A priority Critical patent/KR102331631B1/ko
Publication of WO2019205498A1 publication Critical patent/WO2019205498A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0682Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0638Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0644External master-clock

Definitions

  • the present application relates to the field of power system technologies, and in particular, to a clock synchronization method, device, computer device, and storage medium for an electric energy meter.
  • the current power billing mode of the power system is mainly based on monthly non-real-time payment.
  • the energy meter uses its own time as a standard to count the power consumption for a long period of time (usually in days and months), and then periodically reads the meter's metering data.
  • the time error of the energy meter is not sensitive.
  • the timing command can be issued from the electric meter data collecting main station to perform the point-to-point timing.
  • the timing mechanism is that the power generation time of the main station is given to the concentrator or the negative control terminal, and then the concentrator and the negative control terminal send the time-bearing message to the electric energy meter, and the electric meter executes the timing. In this way, after multiple levels of transit, and there are delays, retransmissions, and the like in the message in the complex network, the time of the energy meter cannot be effectively synchronized.
  • the technical solution adopts a scheme in which the primary station performs time synchronization of the timing instructions through the negative control terminal or the concentrator through the transmission meter.
  • a master station usually needs to manage tens of thousands to millions of meters, perform a time error interpretation on all meters, and it takes a long time to issue a calibration, and the time error management of the meter is poor in real-time.
  • a clock synchronization method for an electric energy meter comprising:
  • time calibration message includes the calibration time to synchronize the local clock of the electric energy meter.
  • the clock synchronization method of the above electric energy meter obtains an accurate absolute time and pairs the internal clock counter to realize accurate subsequent timing, and then sends the first time-time message at the first time through a preset communication protocol, and the electric energy meter is After receiving the first pair of time packets, the second time packet is fed back, and the second time of receiving the second message is recorded, thereby combining the transmission delay of the message to calculate the processing delay of the energy meter to the packet, and then The calibration time of the local clock of the electric energy meter is calculated, thereby realizing the local clock synchronization of the electric energy meter by transmitting a time calibration message to the electric energy meter.
  • the local clock of the electric energy meter can meet the requirement of the second level by using an accurate clock source and considering the delay of message transmission and processing.
  • the method further includes: decompressing the second time-to-time message to obtain a third time of the local clock of the power meter; and obtaining the power according to the second time, the third time, and the transmission delay The time error of the local clock of the table; determining whether the time error is within a preset time range, thereby determining whether the local clock of the energy meter is synchronized.
  • the method further includes: calculating a time error of the local clock of the electric energy meter:
  • dt0 represents the time error of the local clock of the electric energy meter
  • T2 represents the second time
  • T3 represents the third time
  • dt2 represents the transmission delay
  • the method further includes: transmitting, by the power meter communication protocol of the physical link, the first time-to-time message conforming to the power meter communication protocol to the power meter at the first time and the matching of the power meter feedback received at the second time The second pair of time messages of the energy meter communication protocol.
  • the method further includes: acquiring a first packet length of the first time-out packet and a baud rate of the physical link interface, according to the first packet length and the physical link interface a baud rate, a transmission delay of the first time-to-time packet, a second packet length of the second-time packet, and a baud rate of the second packet according to the length of the second packet and the physical link interface.
  • dt1 represents the transmission delay of the first pair of time packets
  • dt2 represents the transmission delay of the second pair of time packets
  • T1 represents the first time
  • T2 represents the second time
  • dt3 represents the processing delay of the first pair of time packets.
  • the method further includes: pre-acquiring the packet assembly time and the packet length of the time calibration message, and adjusting the packet length of the packet, the baud rate of the physical link, and The code length of the time calibration message in the communication link is obtained, and the transmission delay of the time calibration message is obtained; the calculation formula of the calibration time in the time calibration message is:
  • T5 T4+dt3+dt4+dt5
  • T5 represents a calibration time in the time calibration message
  • T4 is a time when the internal clock records the time calibration message
  • the dt4 represents a transmission delay of the time calibration message
  • dt5 represents a predetermined time.
  • the method further includes: acquiring an absolute time from a base station; or acquiring time of the multiple base stations, selecting one of the times of the multiple base stations as the absolute time; or, by using an internal GPS module or a Beidou module Get absolute time.
  • a clock synchronization device for an electric energy meter comprising:
  • An internal timing module configured to acquire an absolute time, and time to the internal clock according to the absolute time
  • a packet sending and receiving module configured to send a first time-to-time message to the power meter at a first time and a second time-to-time message that is received by the power meter at a second time by using a preset communication protocol;
  • the second time is the time of the internal clock;
  • a delay calculation module configured to obtain, according to the first time, the second time, and the transmission delay, a processing delay of the first time-to-time packet; according to the processing delay, a transmission delay, and a predetermined The message assembly time and the time of the internal clock are obtained, and the calibration time is obtained;
  • a clock synchronization module configured to send a time calibration message to the power meter, wherein the time calibration message includes the calibration time to synchronize a local clock of the power meter.
  • a computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the computer program to implement the following steps:
  • time calibration message includes the calibration time to synchronize the local clock of the electric energy meter.
  • a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the following steps:
  • time calibration message includes the calibration time to synchronize the local clock of the electric energy meter.
  • the clock synchronization method, device, computer device and storage medium of the above electric energy meter enable the electric energy meter to meet the requirement of the second level through an accurate clock source and considering the delay of message transmission and processing.
  • FIG. 1 is an application environment diagram of a clock synchronization method of an electric energy meter in an embodiment
  • FIG. 2 is a schematic flow chart of a clock synchronization method of an electric energy meter in an embodiment
  • FIG. 3 is a schematic flow chart of a clock synchronization method of an electric energy meter in another embodiment
  • FIG. 4 is a schematic structural diagram of obtaining an absolute time in an embodiment
  • FIG. 5 is a schematic structural diagram of obtaining a second absolute time in an embodiment
  • FIG. 6 is a schematic structural diagram of obtaining a third absolute time in an embodiment
  • FIG. 7 is a timing diagram of a clock synchronization method of an electric energy meter in an embodiment
  • Figure 8 is a block diagram showing the structure of a clock synchronizing apparatus of an electric energy meter in an embodiment
  • Figure 9 is a diagram showing the internal structure of a computer device in an embodiment.
  • the clock synchronization method of the electric energy meter provided by the present application can be applied to an application environment as shown in FIG. 1.
  • the electric energy meter 102 communicates with the timing terminal 104 by setting a communication protocol interface in advance.
  • the electric energy meter 102 can be an electronic electric energy meter, a prepaid electric energy meter, or the like.
  • the timing terminal 104 can have a smart phone, a notebook computer or the like with a communication protocol interface preset.
  • the local clock is integrated in the electric energy meter 102 for recording its own time, and the time requirement of the electric energy meter service is provided by the local clock.
  • the timing terminal 104 includes a GPS module or a Beidou module for obtaining an absolute time from the Beidou or the GPS.
  • the terminal 104 can also pass through the communication module from a nearby base station or multiple. The base stations obtain absolute time.
  • a clock synchronization method for an electric energy meter is provided.
  • the method is applied to the timing terminal in FIG. 1 as an example, and includes the following steps:
  • step 202 an absolute time is obtained, and the internal clock is timed according to the absolute time.
  • absolute time can be considered as accurate time.
  • absolute time is stored in the GPS system and the Beidou system.
  • the absolute time is used as the internal clock, thereby ensuring the accuracy of the internal time of the terminal.
  • Step 204 Send a first time-to-time message to the power meter at a first time by using a preset communication protocol, and receive a second time-time message fed back by the power meter at a second time; the first time and the second time are internal The time of the clock.
  • the communication protocol may be determined by the connection relationship between the power meter and the timed terminal.
  • the power meter and the timed terminal are connected through the RS485 communication interface, then the communication protocol may be the DL/T645 communication protocol, and the embodiment is not limited to the connection. the way.
  • Step 206 Obtain a processing delay of the first time-to-time packet according to the first time, the second time, and a transmission delay; according to the processing delay, a transmission delay, and a predetermined packet assembly.
  • the time and the time of the internal clock get the calibration time.
  • the transmission delay is the transmission time of the message in the communication line. After determining the connection mode of the energy meter and the time-to-end terminal, the calculation can be performed according to the baud rate of the data transmission and the length of the message. In addition, the processing delay is the time required for the power meter or the timing terminal to decompress the message.
  • Step 208 Send a time calibration message to the electric energy meter, where the calibration time includes the calibration time to synchronize the local clock of the electric energy meter.
  • the internal constant counter is paired to realize the subsequent accurate timing, and then the first time-time message is sent at the first time through a preset communication protocol, and the electric energy meter
  • the second time message is fed back, and the second time of receiving the second message is recorded, and the processing delay of the message is calculated according to the transmission delay of the message, and then the processing delay of the energy table is calculated.
  • the calibration time of the local clock of the electric energy meter can be calculated, thereby realizing the timing of the electric energy meter by sending a time calibration message to the electric energy meter.
  • the electric energy meter can meet the requirement of the second level by using an accurate clock source and considering the transmission of the message and the delay of the processing.
  • FIG. 3 another method for clock synchronization of an electric energy meter is provided, and the method is specifically:
  • the time-of-time terminal can obtain an absolute time from a base station.
  • the base station has a GPS module or a Beidou module. Therefore, the time-station terminal can acquire the base station by communicating with one base station. Absolute time.
  • the time-of-time terminal can acquire an absolute time from a plurality of base stations, and then select one of the times of the plurality of base stations as an absolute time, so that a single base station failure can be avoided. Inaccurate time, specifically, by comparing whether the time of multiple base stations is consistent, the time of the most accurate base station is determined as the absolute time.
  • the GPS terminal or the Beidou module is included in the timing terminal, and the absolute time can be obtained through the local GPS module or the Beidou module.
  • the internal clock may be a clock counter, and the reference of the clock counter is the internal clock of the terminal CPU of the timing, thereby ensuring the accuracy of the clock counter timing, and achieving accurate time by the absolute time versus the clock counter. recording.
  • the first time and the second time are all recorded by an internal clock
  • the third time is the time of the local clock of the electric energy meter.
  • the third time and the transmission delay can be used to obtain the actual time of the local clock of the electric energy meter at the second time, so that the actual time error of the local clock of the electric energy meter can be calculated, and the corresponding timing strategy is set. For example, if the actual time error is greater than 1 s, the time alignment operation is performed, and other time ranges may be selected according to the actual and no requirements.
  • the time error of the local clock of the electric energy meter is calculated as:
  • dt0 represents the time error of the local clock of the electric energy meter
  • T3 represents the third time
  • T2 represents the second time
  • dt2 represents the transmission delay
  • S304 Obtain a processing delay of the first time-to-time packet according to the first time, the second time, and a transmission delay; according to the processing delay, a transmission delay, and a predetermined packet assembly time. And the time of the internal clock, the calibration time is obtained.
  • the processing delay of the energy meter processing message is first calculated, and then the packet assembly time of the energy meter assembly message is determined, and the transmission delay of the message is determined, so that the calibration in the time calibration message can be determined. time.
  • a time calibration message can be constructed, and the time terminal sends a time calibration message to the energy meter, which can realize the timing of the energy meter.
  • the timing terminal and the power meter are connected by a physical link, and the message sent and received between the terminal and the power meter needs to satisfy the power meter communication protocol.
  • a clock synchronization method for an electric energy meter is provided, and the method is as follows:
  • S401 Obtain an absolute time on the terminal side of the timing, and time the internal clock according to the absolute time.
  • the time-of-time terminal can obtain the absolute time from a base station.
  • the base station has a GPS module or a Beidou module. Therefore, the time-to-end terminal can acquire the absolute time of the base station by communicating with one base station.
  • the time-of-sale terminal can obtain an absolute time from a plurality of base stations, and then select one of the times of the plurality of base stations as an absolute time, so that the problem of inaccurate timing can be avoided when a single base station fails. Specifically, by comparing whether the time of multiple base stations is consistent, the time of the most accurate base station is determined as the absolute time.
  • the GPS module or the Beidou module is included in the timing terminal, and the absolute time can be obtained through the local GPS module or the Beidou module.
  • the internal clock may be a clock counter, and the reference of the clock counter is the internal clock of the terminal CPU of the timing, thereby ensuring the accuracy of the clock counter timing, and achieving accurate time by the absolute time versus the clock counter. recording.
  • S403 on the side of the power meter, receives the first time-to-time message, processes the first-time time message, and feeds the second-time time message conforming to the power meter communication protocol to the time-station terminal through the physical link, where the second time-time message is The third time including the local clock of the energy meter.
  • S404 Receive a second pair of time packets on the terminal side of the time-cored terminal, and record the current time as the second time; and process the second message to obtain a third time in the second pair of time messages that includes the local clock of the power meter.
  • the baud rate of the physical link is S
  • the second packet length L2 of the second pair of time packets is obtained
  • the code length of the second pair of time packets in the communication link is m, therefore, the calculation is performed.
  • S405 Obtain a processing delay of the first time-to-time packet according to the first time, the second time, and the transmission delay on the terminal side of the time-to-phase.
  • the first packet length L1 of the first pair of time packets, the baud rate S of the physical link, and the code length m of the first pair of time packets in the communication link are obtained, according to the first A packet length L1, a baud rate S of the RS485 interface, and a code length m of the first pair of time packets in the communication link, obtain a transmission delay dt1 of the first pair of time packets.
  • the transmission delay dt1 of the first pair of time messages can be expressed by the following formula:
  • the transmission delay dt2 of the second pair of time messages can be expressed by the following formula:
  • processing delay dt3 of the first message can be expressed by the following formula:
  • the physical link can be an RS485 interface link, an RS232 interface link, an Ethernet interface link, etc.
  • the power meter communication protocol can be a DL/T645 communication protocol.
  • the communication wave The special rate can be set to 2400 bps
  • the calibration time is obtained according to the processing delay, the transmission delay, the predetermined message assembly time, and the time of the internal clock.
  • the time delay of the message is the delay of the message transmission. Then, after calculating each time delay, the time of the message can be calibrated according to the time of the transmission, and the calibration time is obtained.
  • the calibration time T5 can be expressed by the following formula:
  • T5 T4+dt3+dt4+dt5
  • T5 represents the calibration time in the time calibration message
  • the T4 internal clock records the time of transmitting the time calibration message
  • the dt4 represents the transmission delay of the time calibration message
  • dt5 represents the predetermined report. Assembly time.
  • the calibration time actually included in the time calibration message is T5, so that the accurate timing of the electric energy meter can be realized.
  • the time calibration message includes the calibration time to synchronize the local clock of the power meter.
  • S408 Receive a time calibration message on the side of the energy meter to calibrate the local clock.
  • S409 Waiting for a preset duration on the terminal side of the timing, and sending a third time-out message requesting the local clock time of the energy meter to the power meter again.
  • S410 Receive a third pair of time packets on the side of the power meter, generate a fourth pair of time packets including the local clock time of the power meter, and send the message to the timed terminal.
  • S411 Receive and process the fourth pair of time messages on the terminal side of the time, calculate whether the time of the local clock of the power meter is accurate, and if accurate, stop the time operation.
  • a clock synchronization apparatus for an electric energy meter including: an internal timing module 502, a message transceiving module 504, a delay calculation module 506, and a clock synchronization module 508, wherein:
  • the internal timing module 502 is configured to acquire an absolute time, and time to the internal clock according to the absolute time.
  • the message transceiver module 504 is configured to send a first time-to-time message to the power meter at a first time and a second time-to-time message that is received by the power meter at a second time by using a preset communication protocol;
  • the second time is the time of the internal clock.
  • a delay calculation module 506 configured to obtain, according to the first time, the second time, and the transmission delay, a processing delay of the first time-to-time packet; according to the processing delay, a transmission delay, and an advance The determined message assembly time and the time of the internal clock are obtained.
  • the clock synchronization module 508 is configured to send a time calibration message to the power meter, where the calibration time includes the calibration time to synchronize the local clock of the power meter.
  • the method further includes: a calibration judging module, configured to decompress the second time telegram to obtain a third time of the local clock of the electric energy meter; according to the second time, the third time, and the transmission time Extending, obtaining a time error of the local clock of the electric energy meter; determining whether the time error is within a preset time range, thereby determining whether the local clock of the electric energy meter is synchronized.
  • a calibration judging module configured to decompress the second time telegram to obtain a third time of the local clock of the electric energy meter; according to the second time, the third time, and the transmission time Extending, obtaining a time error of the local clock of the electric energy meter; determining whether the time error is within a preset time range, thereby determining whether the local clock of the electric energy meter is synchronized.
  • the calibration judgment module is further configured to calculate a time error of the local clock of the electric energy meter as:
  • dt0 represents the time error of the local clock of the electric energy meter
  • T2 represents the second time
  • T3 represents the third time
  • dt2 represents the transmission delay
  • the message transceiver module 504 is further configured to send the first time-to-time message conforming to the power meter communication protocol to the power meter and receive the second time at the first time through the power meter communication protocol of the physical link.
  • the energy meter feedback conforms to the second pair of time messages of the energy meter communication protocol.
  • the delay calculation module 506 is further configured to obtain a first packet length of the first time-out packet, a baud rate of the physical link, and a code of the first time-time packet in the communication link.
  • the length according to the first packet length, the baud rate of the physical link, and the code length of the first time-time packet in the communication link, obtain the transmission delay of the first-time packet;
  • the second packet length of the second-time packet is obtained according to the length of the second packet, the baud rate of the physical link, and the code length of the second-time packet in the communication link.
  • the transmission delay; the calculation formula of the processing delay of the first time-time packet is as follows:
  • dt1 represents the transmission delay of the first pair of time packets
  • dt2 represents the transmission delay of the second pair of time packets
  • T1 represents the first time
  • T2 represents the second time
  • dt3 represents the processing delay of the first pair of time packets.
  • the delay calculation module 506 is further configured to pre-acquire the message assembly time and the message length of the time calibration message, according to the message length of the time calibration message, and the RS485 interface.
  • the baud rate and the code length of the time alignment message in the communication link are obtained, and the transmission delay of the time calibration message is obtained; the calculation formula of the calibration time in the time calibration message is:
  • T5 T4+dt3+dt4+dt5
  • T5 represents the calibration time in the time calibration message
  • T4 represents the time when the internal clock records the time calibration message
  • the dt4 represents the transmission delay of the time calibration message
  • dt5 represents the predetermined time.
  • obtaining an absolute time from a base station or acquiring a time of a plurality of base stations, selecting one of the times of the plurality of base stations as the absolute time; or obtaining an absolute time by using an internal GPS module or a Beidou module .
  • the various modules in the clock synchronization device of the above energy meter can be implemented in whole or in part by software, hardware, and combinations thereof.
  • Each of the above modules may be embedded in or independent of the processor in the computer device, or may be stored in a memory in the computer device in a software form, so that the processor invokes the operations corresponding to the above modules.
  • a computer device which may be a server, and its internal structure diagram may be as shown in FIG.
  • the computer device includes a processor, memory, network interface, and database connected by a system bus.
  • the processor of the computer device is used to provide computing and control capabilities.
  • the memory of the computer device includes a non-volatile storage medium, an internal memory.
  • the non-volatile storage medium stores an operating system, a computer program, and a database.
  • the internal memory provides an environment for operation of an operating system and computer programs in a non-volatile storage medium.
  • the database of the computer device is used to store clock synchronized data of the energy meter.
  • the network interface of the computer device is used to communicate with an external terminal via a network connection.
  • the computer program is executed by the processor to implement a clock synchronization method of the energy meter.
  • FIG. 9 is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation of the computer device to which the solution of the present application is applied.
  • the specific computer device may It includes more or fewer components than those shown in the figures, or some components are combined, or have different component arrangements.
  • a computer apparatus comprising a memory and a processor having a computer program stored therein, the processor implementing the computer program to:
  • time calibration message includes the calibration time to synchronize the local clock of the electric energy meter.
  • the processor further executes the following steps: decompressing the second time-to-day message to obtain a third time of the local clock of the power meter; according to the second time, the third time, and the transmission The time delay obtains a time error of the local clock of the electric energy meter; determines whether the time error is within a preset time range, thereby determining whether the local clock of the electric energy meter is synchronized.
  • the processor further implements the following steps when the processor executes the computer program: the time error of the local clock of the energy meter is calculated as:
  • dt0 represents the time error of the electric energy meter
  • T2 represents the second time
  • T3 represents the third time
  • dt2 represents the transmission delay
  • the processor when executing the computer program, further implements the step of: transmitting, by the energy meter communication protocol of the physical link, the first time-to-time message conforming to the power meter communication protocol to the power meter at the first time and in the second The time is received by the energy meter to comply with the second time of the energy meter communication protocol.
  • the processor when executing the computer program, further implements the steps of: obtaining a first message length of the first time-out message, a baud rate of the physical link, and the first time-to-time message in the communication link
  • the length of the code according to the first packet length, the baud rate of the physical link, and the code length of the first time-time packet in the communication link, the transmission delay of the first-time packet is obtained;
  • the transmission delay of the time packet; the calculation formula of the processing delay of the first time-time packet is as follows:
  • dt1 represents the transmission delay of the first pair of time packets
  • dt2 represents the transmission delay of the second pair of time packets
  • T1 represents the first time
  • T2 represents the second time
  • dt3 represents the processing delay of the first pair of time packets.
  • the following steps are further performed: pre-acquiring the message assembly time and the message length of the time calibration message, and adjusting the message length of the message according to the time, the physical The baud rate of the link and the code length of the time alignment message in the communication link are obtained, and the transmission delay of the time calibration message is obtained; the calculation formula of the calibration time in the time calibration message is:
  • T5 T4+dt3+dt4+dt5
  • T5 represents the calibration time in the time calibration message
  • T4 represents the time when the internal clock records the time calibration message
  • the dt4 represents the transmission delay of the time calibration message
  • dt5 represents the predetermined time.
  • the processor further implements the steps of: obtaining an absolute time from a base station when executing the computer program; or acquiring time of the plurality of base stations, selecting one of the times of the plurality of base stations as the absolute time; or Obtain absolute time via the internal GPS module or the Beidou module.
  • a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the following steps:
  • time calibration message includes the calibration time to synchronize the local clock of the electric energy meter.
  • the computer program when executed by the processor, further implements the step of decompressing the second time-of-day message to obtain a third time of the local clock of the power meter; according to the second time, the third time, and The transmission delay is obtained, and the time error of the local clock of the electric energy meter is obtained; whether the time error is within a preset time range is determined, thereby determining whether the local clock of the electric energy meter is synchronized.
  • the time error of the local clock of the electric energy meter is calculated as:
  • dt0 represents the time error of the local clock of the electric energy meter
  • T2 represents the second time
  • T3 represents the third time
  • dt2 represents the transmission delay
  • the computer program when executed by the processor, further implements the step of: transmitting, by the energy meter communication protocol of the physical link, the first time-to-time message conforming to the power meter communication protocol to the power meter at the first time and The second time time receiving the energy meter feedback is in accordance with the second time of the energy meter communication protocol.
  • the computer program is further executed by the processor to: obtain a first message length of the first time-out message, a baud rate of the physical link, and a first time-to-time message on the communication link
  • the transmission length of the first time-to-time packet is obtained according to the length of the first packet, the baud rate of the physical link, and the coding length of the first-time packet in the communication link.
  • the transmission delay of the time-of-day message; the calculation formula of the processing delay of the first-time message is as follows:
  • the following steps are further performed: pre-acquiring the packet assembly time and the message length of the time calibration message, and according to the packet length of the time calibration message, The baud rate of the physical link and the code length of the time alignment message in the communication link obtain the transmission delay of the time calibration message; the calculation formula of the calibration time in the time calibration message is:
  • T5 represents the calibration time in the time calibration message
  • T4 represents the time when the internal clock records the time calibration message
  • the dt4 represents the transmission delay of the time calibration message
  • dt5 represents the predetermined time.
  • the computer program is further executed by the processor to: obtain an absolute time from a base station; or acquire a time of the plurality of base stations, select one of the times of the plurality of base stations as the absolute time; or Obtain absolute time via the internal GPS module or the Beidou module.
  • Non-volatile memory can include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory.
  • Volatile memory can include random access memory (RAM) or external cache memory.
  • RAM is available in a variety of formats, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronization chain.
  • SRAM static RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
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Abstract

本申请涉及一种电能表的时钟同步方法、装置、计算机设备和存储介质。所述方法包括:获取绝对时间,根据绝对时间对内部时钟对时,通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文,第一时间、第二时间为内部时钟的时间,根据所述第一时间、所述第二时间以及传输时延,得到第一对时报文的处理时延,根据处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间,向电能表发送时间校准报文,时间校准报文中包含校准时间,以对电能就量表的本地时钟同步。本发明通过精确的时钟源以及考虑报文传输以及处理的时延,使电能表的时钟能够满足秒级的要求。

Description

电能表的时钟同步方法、装置、计算机设备和存储介质 技术领域
本申请涉及电力系统技术领域,特别是涉及一种电能表的时钟同步方法、装置、计算机设备和存储介质。
背景技术
在电力系统中,存在大量的电能表用于电能计量与事件记录。当前电力系统的电能计费模式,主要是按月非实时缴费。在这种非实时计费系统中,电能表以自身的时间为标准,统计较长一段时间之内(通常是以天、月为单位)的用电量,再定期抄读电表的计量数据。在这种业务场景下,电能表的时间误差不敏感。
当前在非实时计费系统中,为了保证电能表时间的准确性,可以从电表数据采集主站下发对时命令,来执行点对点的对时。但是,这种对时机制是主站下发电表时间给集中器或者负控终端,再由集中器和负控终端将带有时间的报文下发给电能表,电表再执行对时。这样,经过多级中转,并且在复杂网络中报文还存在延迟、重传等多种情况,导致电能表的时间无法有效同步。
另外,还有技术方案采用主站通过负控终端或者集中器透传电表对时指令进行时间同步的方案。但是,一个主站通常需要管理数万至数百万个电表,对所有电表进行一次时间误差判读,并且下发一次校时需要很长时间,对电表时间误差管理的实时性较差。
在面对电力业务发展过程中,对电表数据采集的实时性要求越来越高,以电力交易为例,电表数据实时采集要求达到分钟级的精度,从而电能表时间必须达到秒级以下的精度。现有对时机制无法满足大规模电能表的绝对时间秒级同步的要求。
发明内容
基于此,有必要针对上述技术问题,提供一种能够解决现有对时机制无法 满足大规模秒级同步的要求的问题的电能表的时钟同步方法、装置、计算机设备和存储介质。
一种电能表的时钟同步方法,所述方法包括:
获取绝对时间,根据所述绝对时间对内部时钟对时;
通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
上述电能表的时钟同步方法,通过获取准确的绝对时间,对内部时钟计数器对时,以实现后续的准确计时,然后通过预先设置的通讯协议在第一时间发送第一对时报文,电能表在接收第一对时报文后,反馈第二对时报文,记录接收第二报文的第二时间,以此结合报文的传输时延,计算出电能表对报文的处理时延,进而可以计算得到电能表的本地时钟的校准时间,从而通过向电能表发送时间校准报文,以实现电能表的本地时钟同步。本发明实施例,通过精确的时钟源以及考虑报文传输以及处理的时延,使电能表的本地时钟能够满足秒级的要求。
在其中一个实施例中,还包括:解压所述第二对时报文得到所述电能表的本地时钟的第三时间;根据所述第二时间、第三时间以及传输时延,得到所述电能表本地时钟的时间误差;判断所述时间误差是否在预先设置的时间范围内,以此判断是否对电能表的本地时钟同步。
在其中一个实施例中,还包括:所述电能表本地时钟的时间误差的计算公式为:
dt0=T3+dt2-T2
其中,dt0表示所述电能表本地时钟的时间误差,T2表示第二时间,T3表 示第三时间,dt2表示传输时延。
在其中一个实施例中,还包括:通过物理链路的电能表通讯协议,在第一时间向电能表发送符合电能表通讯协议的第一对时报文以及在第二时间接收电能表反馈的符合电能表通讯协议第二对时报文。
在其中一个实施例中,还包括:获取第一对时报文的第一报文长度以及所述物理链路接口的波特率,根据所述第一报文长度以及所述物理链路接口的波特率,得到所述第一对时报文的传输时延;获取第二对时报文的第二报文长度,根据所述第二报文长度以及所述物理链路接口的波特率,得到第二对时报文的传输时延;所述第一对时报文的处理时延的计算公式如下:
dt3=T2-T1-dt1-dt2
其中,dt1表示第一对时报文的传输时延,dt2表示第二对时报文的传输时延,T1表示第一时间,T2表示第二时间,dt3表示第一对时报文的处理时延。
在其中一个实施例中,还包括:预先获取所述报文组装时间以及时间校准报文的报文长度,根据所述时间校准报文的报文长度、所述物理链路的波特率以及时间校准报文在通信链路中的编码长度,得到所述时间校准报文的传输时延;所述时间校准报文中校准时间的计算公式为:
T5=T4+dt3+dt4+dt5
其中,T5表示所述时间校准报文中的校准时间,T4为内部时钟记录发送所述时间校准报文的时间,所述dt4表示所述时间校准报文的传输时延,dt5表示预先确定的报文组装时间。
在其中一个实施例中,还包括:从一个基站获取绝对时间;或,获取多个基站的时间,从多个基站的时间中选择一个作为所述绝对时间;或,通过内部GPS模块或北斗模块获取绝对时间。
一种电能表的时钟同步装置,所述装置包括:
内部对时模块,用于获取绝对时间,根据所述绝对时间对内部时钟对时;
报文收发模块,用于通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
时延计算模块,用于根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
时钟同步模块,用于向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
一种计算机设备,包括存储器和处理器,所述存储器存储有计算机程序,所述处理器执行所述计算机程序时实现以下步骤:
获取绝对时间,根据所述绝对时间对内部时钟对时;
通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
一种计算机可读存储介质,其上存储有计算机程序,所述计算机程序被处理器执行时实现以下步骤:
获取绝对时间,根据所述绝对时间对内部时钟对时;
通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
上述电能表的时钟同步方法、装置、计算机设备和存储介质,通过精确的 时钟源以及考虑报文传输以及处理的时延,使电能表能够满足秒级的要求。
附图说明
图1为一个实施例中电能表的时钟同步方法的应用环境图;
图2为一个实施例中电能表的时钟同步方法的流程示意图;
图3为另一个实施例中电能表的时钟同步方法的流程示意图;
图4为一实施例中第一种获取绝对时间的结构示意图;
图5为一实施例中第二种获取绝对时间的结构示意图;
图6为一实施例中第三种获取绝对时间的结构示意图;
图7为一实施例中电能表的时钟同步方法的时序图;
图8为一个实施例中电能表的时钟同步装置的结构框图;
图9为一个实施例中计算机设备的内部结构图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本申请进行进一步详细说明。应当理解,此处描述的具体实施例仅仅用以解释本申请,并不用于限定本申请。
本申请提供的电能表的时钟同步方法,可以应用于如图1所示的应用环境中。其中,电能表102通过预先设置通讯协议接口与对时终端104进行通信。其中,电能表102可以电子式电能表、电卡预付费电能表等,对时终端104可以具有预先设置通讯协议接口的智能手机、笔记本电脑等。
其中,电能表102中集成有本地时钟,用于自身的时间的记录,电能表业务的时间需求是通过该本地时钟提供的。
进一步的,对时终端104包括GPS模块或者北斗模块,用于从北斗或者GPS获取绝对时间,另外,对时终端104如果没有GPS模块或者北斗模块,也可以通过通讯模块从附近的一个基站或者多个基站获取绝对时间。
在一个实施例中,如图2所示,提供了一种电能表的时钟同步方法,以该方法应用于图1中的对时终端为例进行说明,包括以下步骤:
步骤202,获取绝对时间,根据所述绝对时间对内部时钟对时。
其中,绝对时间可以认为是准确的时间,一般而言,GPS系统和北斗系统中存储有绝对时间。
具体的,对时终端获取绝对时间后,利用绝对时间为内部时钟对时,从而保证对时终端内部时间的准确性。
步骤204,通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间。
其中,通讯协议可以由电能表和对时终端的连接关系确定,例如,电能表和对时终端通过RS485通讯接口连接,那么通讯协议可以是DL/T645通讯协议,本实施例不限于这种连接方式。
步骤206,根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间。
其中,传输时延是报文在通讯线路中的传输时间,在确定电能表和对时终端的连接方式后,可以根据数据传输的波特率以及报文长度进行计算。另外,处理时延是电能表或者对时终端在解压报文时所需要的时间。
步骤208,向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
上述电能表的时钟同步方法中,通过获取准确的绝对时间,对内部始终计数器对时,以实现后续的准确计时,然后通过预先设置的通讯协议在第一时间发送第一对时报文,电能表在接收第一对时报文后,反馈第二对时报文,记录接收第二报文的第二时间,以此结合报文的传输时延,计算出电能表对报文的处理时延,进而可以计算得到电能表本地时钟的校准时间,从而通过向电能表发送时间校准报文,以实现电能表的对时。本发明实施例,通过精确的时钟源以及考虑报文传输以及处理的时延,使电能表能够满足秒级的要求。
在一实施例中,如图3所示,提供另一种电能表的时钟同步的方法,该方法具体为:
S301,获取绝对时间,根据所述绝对时间对内部时钟对时。
在一实施例中,如图4所示,对时终端可以从一个基站获取绝对时间,一般而言,基站中有GPS模块或者北斗模块,因此,对时终端通过与一个基站通讯既可以获取基站的绝对时间。
在另一实施例中,如图5所示,对时终端可以从多个基站获取绝对时间,然后在多个基站的时间中选择一个作为绝对时间,这样就可以避免单一基站故障时,导致校时不准确的问题,具体的,通过对比多个基站时间是否一致,判断出最准确的基站的时间,以此作为绝对时间。
在又一实施例中,如图6所示,对时终端中包括GPS模块或者北斗模块,可以通过本地的GPS模块或者北斗模块获取绝对时间。
另外,在一实施例中,内部时钟可以是时钟计数器,时钟计数器计数的基准为对时终端CPU内部时钟,从而保证时钟计数器计时的准确性,通过绝对时间对时钟计数器对时,实现时间的精确记录。
S302,通过预先设置的通信协议在第一时间向电能表发送第一对时报文,在第二时间接收电能表反馈的第二对时报文,解压所述第二对时报文得到所述电能表的本地时钟的第三时间。
本发明实施例中,第一时间、第二时间均是通过内部时钟记录得到的,第三时间是电能表本地时钟的时间。
S303,根据第二时间、第三时间以及传输时延,得到所述电能表本地时钟的时间误差;判断时间误差是否在预先设置的时间范围内,以此判断是否对电能表进行时钟同步。
在一实施例中,通过第三时间以及传输时延,可以得到电能表本地时钟在第二时间的实际时间,因此可以计算出电能表本地时钟的实际时间误差,通过设置相应的对时策略,例如:设置在实际时间误差大于1s执行对时操作,也可以根据实际的也无需求选择其他的时间范围,在本发明实施例中,电能表本地时钟的时间误差的计算公式为:
dt0=T3+dt2-T2
其中,dt0表示所述电能表本地时钟的时间误差,T3表示第三时间,T2表 示第二时间,dt2表示传输时延。
如若时间范围是>1s,那么在dt0≤1s时,无需对电能表执行对时,结束本次的对时操作,在dt0>1s时,需要对电能表执行对时,执行S304的步骤。
S304,根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间。
本实施例中,首先需要计算电能表处理报文的处理时延,然后确定电能表装配报文的报文组装时间,以及确定报文的传输时延,就可以确定时间校准报文中的校准时间。
S305,向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能就量表的本地时钟同步。
本发明实施例,通过计算校准时间,根据预先设置的通讯协议,可以构建时间校准报文,对时终端向电能表发送时间校准报文,既可以实现电能表的对时。
在一实施例中,如图7所示,对时终端和电能表是通过物理链路连接,对时终端和电能表之间收发的报文需要满足电能表通讯协议。提供一种电能表的时钟同步方法,在该方法具体如下:
S401,在对时终端一侧,获取绝对时间,根据所述绝对时间对内部时钟计时。
在一实施例中,对时终端可以从一个基站获取绝对时间,一般而言,基站中有GPS模块或者北斗模块,因此,对时终端通过与一个基站通讯既可以获取基站的绝对时间。
在另一实施例中,对时终端可以从多个基站获取绝对时间,然后在多个基站的时间中选择一个作为绝对时间,这样就可以避免单一基站故障时,导致校时不准确的问题,具体的,通过对比多个基站时间是否一致,判断出最准确的基站的时间,以此作为绝对时间。
在又一实施例中,对时终端中包括GPS模块或者北斗模块,可以通过本地的GPS模块或者北斗模块获取绝对时间。
另外,在一实施例中,内部时钟可以是时钟计数器,时钟计数器计数的基准为对时终端CPU内部时钟,从而保证时钟计数器计时的准确性,通过绝对时间对时钟计数器对时,实现时间的精确记录。
S402,在对时终端一侧,通过物理链路在第一时间向电能表发送符合电能表通讯协议的第一对时报文。
S403,在电能表一侧,接收第一对时报文,处理第一对时报文,通过物理链路向对时终端反馈符合电能表通讯协议的第二对时报文,其中,第二对时报文中包括电能表本地时钟的第三时间。
S404,在对时终端一侧,接收第二对时报文,并记录此刻为第二时间;处理第二报文,得到第二对时报文中包含电能表本地时钟的第三时间。
在一实施例中,物理链路的波特率为S,可以获取第二对时报文的第二报文长度L2,第二对时报文在通信链路中的编码长度为m,因此,计算第二对时报文从电能表发送到对时终端的传输时延dt2=(S/m)/L2,那么在第二时间T2,电能表的估计时间T4=T3+dt2,因此,电能表本地时钟的时间误差为dt0=T3+dt2-T2。
在另一实施例中,还需要判断dt0是否满足秒级同步的要求,若是,则不需要额外的对时,整个对时流程中止,若否,则还需要进行S405的步骤。
S405,在对时终端一侧,根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延。
在一实施例中,获取第一对时报文的第一报文长度L1、所述物理链路的波特率S以及第一对时报文在通信链路中的编码长度m,根据所述第一报文长度L1、所述RS485接口的波特率S以及第一对时报文在通信链路中的编码长度m,得到所述第一对时报文的传输时延dt1。第一对时报文的传输时延dt1可以用以下公式表示:
dt1=(S/m)/L1
第二对时报文的传输时延dt2可以用以下公式表示:
dt2=(S/m)/L2
那么第一报文的处理时延dt3可以用如下公式表示:
dt3=T2-T1-dt1-dt2
值得说明的是,物理链路可以是RS485接口链路、RS232接口链路、以太网接口链路等,电能表通信协议可以是DL/T645通讯协议,在RS485接口的通讯链路中,通信波特率可以设置为2400bps,第一对时报文和第二对时报文在通信链路中的编码长度m均表示第一对时报文和第二对时报文每一字节的编码长度。例如,第一对时报文的报文长度为8个字节,那么在通信链路中,编码长度m=10。
S406,在对时终端一侧,根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间。
本发明实施例,影响对时误差的是报文传输的时延,那么,在计算各个时延之后,可以根据发送时间校准报文的时间,得到校准时间。
在一实施例中,可以用以下公式表示校准时间T5:
T5=T4+dt3+dt4+dt5
其中,T5表示所述时间校准报文中的校准时间,T4内部时钟记录发送所述时间校准报文的时间,所述dt4表示所述时间校准报文的传输时延,dt5表示预先确定的报文组装时间。
具体的,在T4时刻向电能表发送时间校准报文,那么时间校准报文中实际所包含的校准时间为T5,以此,才可以实现电能表的准确对时。
S407,在对时终端一侧,向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
S408,在电能表一侧,接收时间校准报文,对本地时钟进行校准。
S409,在对时终端一侧,等待预设时长,再次向电能表发送请求电能表本地时钟时间的第三对时报文。
S410,在电能表一侧,接收第三对时报文,生成包含电能表本地时钟时间的第四对时报文,并发送至对时终端。
S411,在对时终端一侧,接收并处理第四对时报文,计算电能表本地时钟的时间是否准确,若准确,则停止对时操作。
应该理解的是,虽然图2和3的流程图中的各个步骤按照箭头的指示依次 显示,但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明,这些步骤的执行并没有严格的顺序限制,这些步骤可以以其它的顺序执行。而且,图2和3中的至少一部分步骤可以包括多个子步骤或者多个阶段,这些子步骤或者阶段并不必然是在同一时刻执行完成,而是可以在不同的时刻执行,这些子步骤或者阶段的执行顺序也不必然是依次进行,而是可以与其它步骤或者其它步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
在一个实施例中,如图8所示,提供了一种电能表的时钟同步装置,包括:内部对时模块502、报文收发模块504、时延计算模块506和时钟同步模块508,其中:
内部对时模块502,用于获取绝对时间,根据所述绝对时间对内部时钟对时。
报文收发模块504,用于通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间。
时延计算模块506,用于根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间。
时钟同步模块508,用于向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
在其中一个实施例中,还包括:校准判断模块,用于解压所述第二对时报文得到所述电能表的本地时钟的第三时间;根据所述第二时间、第三时间以及传输时延,得到所述电能表本地时钟的时间误差;判断所述时间误差是否在预先设置的时间范围内,以此判断是否对电能表的本地时钟同步。
在其中一个实施例中,校准判断模块还用于所述电能表本地时钟的时间误差的计算公式为:
dt0=T3+dt2-T2
其中,dt0表示所述电能表本地时钟的时间误差,T2表示第二时间,T3表 示第三时间,dt2表示传输时延。
在其中一个实施例中,报文收发模块504还用于通过物理链路的电能表通信协议,在第一时间向电能表发送符合电能表通讯协议的第一对时报文以及在第二时间接收电能表反馈的符合电能表通讯协议第二对时报文。
在其中一个实施例中,时延计算模块506还用于获取第一对时报文的第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,根据所述第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,得到所述第一对时报文的传输时延;获取第二对时报文的第二报文长度,根据所述第二报文长度以及所述物理链路的波特率以及第二对时报文在通信链路中的编码长度,得到第二对时报文的传输时延;所述第一对时报文的处理时延的计算公式如下:
dt3=T2-T1-dt1-dt2
其中,dt1表示第一对时报文的传输时延,dt2表示第二对时报文的传输时延,T1表示第一时间,T2表示第二时间,dt3表示第一对时报文的处理时延。
在其中一个实施例中,时延计算模块506还用于预先获取所述报文组装时间以及时间校准报文的报文长度,根据所述时间校准报文的报文长度、所述RS485接口的波特率以及时间校准报文在通信链路中的编码长度,得到所述时间校准报文的传输时延;所述时间校准报文中校准时间的计算公式为:
T5=T4+dt3+dt4+dt5
其中,T5表示所述时间校准报文中的校准时间,T4表示内部时钟记录发送所述时间校准报文的时间,所述dt4表示所述时间校准报文的传输时延,dt5表示预先确定的报文组装时间。
在其中一个实施例中,从一个基站获取绝对时间;或,获取多个基站的时间,从多个基站的时间中选择一个作为所述绝对时间;或,通过内部GPS模块或北斗模块获取绝对时间。
关于电能表的时钟同步装置的具体限定可以参见上文中对于电能表的时钟同步方法的限定,在此不再赘述。上述电能表的时钟同步装置中的各个模块可全部或部分通过软件、硬件及其组合来实现。上述各模块可以硬件形式内嵌于 或独立于计算机设备中的处理器中,也可以以软件形式存储于计算机设备中的存储器中,以便于处理器调用执行以上各个模块对应的操作。
在一个实施例中,提供了一种计算机设备,该计算机设备可以是服务器,其内部结构图可以如图9所示。该计算机设备包括通过系统总线连接的处理器、存储器、网络接口和数据库。其中,该计算机设备的处理器用于提供计算和控制能力。该计算机设备的存储器包括非易失性存储介质、内存储器。该非易失性存储介质存储有操作系统、计算机程序和数据库。该内存储器为非易失性存储介质中的操作系统和计算机程序的运行提供环境。该计算机设备的数据库用于存储电能表的时钟同步的数据。该计算机设备的网络接口用于与外部的终端通过网络连接通信。该计算机程序被处理器执行时以实现一种电能表的时钟同步方法。
本领域技术人员可以理解,图9中示出的结构,仅仅是与本申请方案相关的部分结构的框图,并不构成对本申请方案所应用于其上的计算机设备的限定,具体的计算机设备可以包括比图中所示更多或更少的部件,或者组合某些部件,或者具有不同的部件布置。
在一个实施例中,提供了一种计算机设备,包括存储器和处理器,存储器中存储有计算机程序,该处理器执行计算机程序时实现以下步骤:
获取绝对时间,根据所述绝对时间对内部时钟对时;
通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
在一个实施例中,处理器执行计算机程序时还实现以下步骤:解压所述第 二对时报文得到所述电能表的本地时钟的第三时间;根据所述第二时间、第三时间以及传输时延,得到所述电能表本地时钟的时间误差;判断所述时间误差是否在预先设置的时间范围内,以此判断是否对电能表的本地时钟同步。
在一个实施例中,处理器执行计算机程序时还实现以下步骤:所述电能表本地时钟的时间误差的计算公式为:
dt0=T3+dt2-T2
其中,dt0表示所述电能表的时间误差,T2表示第二时间,T3表示第三时间,dt2表示传输时延。
在一个实施例中,处理器执行计算机程序时还实现以下步骤:通过物理链路的电能表通信协议,在第一时间向电能表发送符合电能表通讯协议的第一对时报文以及在第二时间接收电能表反馈的符合电能表通讯协议第二对时报文。
在一个实施例中,处理器执行计算机程序时还实现以下步骤:获取第一对时报文的第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,根据所述第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,得到所述第一对时报文的传输时延;获取第二对时报文的第二报文长度,根据所述第二报文长度以及所述物理链路的波特率以及第二对时报文在通信链路中的编码长度,得到第二对时报文的传输时延;所述第一对时报文的处理时延的计算公式如下:
dt3=T2-T1-dt1-dt2
其中,dt1表示第一对时报文的传输时延,dt2表示第二对时报文的传输时延,T1表示第一时间,T2表示第二时间,dt3表示第一对时报文的处理时延。
在一个实施例中,处理器执行计算机程序时还实现以下步骤:预先获取所述报文组装时间以及时间校准报文的报文长度,根据所述时间校准报文的报文长度、所述物理链路的波特率以及时间校准报文在通信链路中的编码长度,得到所述时间校准报文的传输时延;所述时间校准报文中校准时间的计算公式为:
T5=T4+dt3+dt4+dt5
其中,T5表示所述时间校准报文中的校准时间,T4表示内部时钟记录发送所述时间校准报文的时间,所述dt4表示所述时间校准报文的传输时延,dt5表 示预先确定的报文组装时间。
在一个实施例中,处理器执行计算机程序时还实现以下步骤:从一个基站获取绝对时间;或,获取多个基站的时间,从多个基站的时间中选择一个作为所述绝对时间;或,通过内部GPS模块或北斗模块获取绝对时间。
在一个实施例中,提供了一种计算机可读存储介质,其上存储有计算机程序,计算机程序被处理器执行时实现以下步骤:
获取绝对时间,根据所述绝对时间对内部时钟对时;
通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
在一个实施例中,计算机程序被处理器执行时还实现以下步骤:解压所述第二对时报文得到所述电能表的本地时钟的第三时间;根据所述第二时间、第三时间以及传输时延,得到所述电能表本地时钟的时间误差;判断所述时间误差是否在预先设置的时间范围内,以此判断是否对电能表的本地时钟同步。
在一个实施例中,计算机程序被处理器执行时还实现以下步骤:所述电能表本地时钟的时间误差的计算公式为:
dt0=T3+dt2-T2
其中,dt0表示所述电能表本地时钟的时间误差,T2表示第二时间,T3表示第三时间,dt2表示传输时延。
在一个实施例中,计算机程序被处理器执行时还实现以下步骤:通过物理链路的电能表通信协议,在第一时间向电能表发送符合电能表通讯协议的第一对时报文以及在第二时间接收电能表反馈的符合电能表通讯协议第二对时报文。
在一个实施例中,计算机程序被处理器执行时还实现以下步骤:获取第一对时报文的第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,根据所述第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,得到所述第一对时报文的传输时延;获取第二对时报文的第二报文长度,根据所述第二报文长度以及所述物理链路的波特率以及第二对时报文在通信链路中的编码长度,得到第二对时报文的传输时延;所述第一对时报文的处理时延的计算公式如下:
dt3=T2-T1-dt1-dt2
其中,dt1表示第一对时报文的传输时延,dt2表示第二对时报文的传输时延,T1表示第一时间,T2表示第二时间,dt3表示第一对时报文的处理时延。
在一个实施例中,计算机程序被处理器执行时还实现以下步骤:预先获取所述报文组装时间以及时间校准报文的报文长度,根据所述时间校准报文的报文长度、所述物理链路的波特率以及时间校准报文在通信链路中的编码长度,得到所述时间校准报文的传输时延;所述时间校准报文中校准时间的计算公式为:
T5=T4+dt3+dt4+dt5
其中,T5表示所述时间校准报文中的校准时间,T4表示内部时钟记录发送所述时间校准报文的时间,所述dt4表示所述时间校准报文的传输时延,dt5表示预先确定的报文组装时间。
在一个实施例中,计算机程序被处理器执行时还实现以下步骤:从一个基站获取绝对时间;或,获取多个基站的时间,从多个基站的时间中选择一个作为所述绝对时间;或,通过内部GPS模块或北斗模块获取绝对时间。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,是可以通过计算机程序来指令相关的硬件来完成,所述的计算机程序可存储于一非易失性计算机可读取存储介质中,该计算机程序在执行时,可包括如上述各方法的实施例的流程。其中,本申请所提供的各实施例中所使用的对存储器、存储、数据库或其它介质的任何引用,均可包括非易失性和/或易失性存储器。非易失性存储器可包括只读存储器(ROM)、可编程ROM(PROM)、电可编程 ROM(EPROM)、电可擦除可编程ROM(EEPROM)或闪存。易失性存储器可包括随机存取存储器(RAM)或者外部高速缓冲存储器。作为说明而非局限,RAM以多种形式可得,诸如静态RAM(SRAM)、动态RAM(DRAM)、同步DRAM(SDRAM)、双数据率SDRAM(DDRSDRAM)、增强型SDRAM(ESDRAM)、同步链路(Synchlink)DRAM(SLDRAM)、存储器总线(Rambus)直接RAM(RDRAM)、直接存储器总线动态RAM(DRDRAM)、以及存储器总线动态RAM(RDRAM)等。
以上实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本申请构思的前提下,还可以做出若干变形和改进,这些都属于本申请的保护范围。因此,本申请专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种电能表的时钟同步方法,其特征在于,所述方法包括:
    获取绝对时间,根据所述绝对时间对内部时钟对时;
    通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
    根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
    向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
  2. 根据权利要求1所述的电能表的时钟同步方法,其特征在于,还包括:
    解压所述第二对时报文得到所述电能表的本地时钟的第三时间;
    根据所述第二时间、第三时间以及传输时延,得到所述电能表本地时钟的时间误差;
    判断所述时间误差是否在预先设置的时间范围内,以此判断是否对电能表的本地时钟同步。
  3. 根据权利要求2所述的电能表的时钟同步方法,其特征在于,所述根据所述第二时间、第三时间以及传输时延,得到所述电能表本地时钟的时间误差,包括:
    所述电能表本地时钟的时间误差的计算公式为:
    dt0=T3+dt2-T2
    其中,dt0表示所述电能表本地时钟的时间误差,T2表示第二时间,T3表示第三时间,dt2表示传输时延。
  4. 根据权利要求1所述电能表的时钟同步方法,其特征在于,所述预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文,包括:
    通过物理链路的电能表通信协议,在第一时间向电能表发送符合电能表通讯协议的第一对时报文以及在第二时间接收电能表反馈的符合电能表通讯协议第二对时报文。
  5. 根据权利要求4所述的电能表的时钟同步方法,其特征在于,所述根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延,包括:
    获取第一对时报文的第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,根据所述第一报文长度、所述物理链路的波特率以及第一对时报文在通信链路中的编码长度,得到所述第一对时报文的传输时延;
    获取第二对时报文的第二报文长度,根据所述第二报文长度以及所述物理链路的波特率以及第二对时报文在通信链路中的编码长度,得到第二对时报文的传输时延;
    所述第一对时报文的处理时延的计算公式如下:
    dt3=T2-T1-dt1-dt2
    其中,dt1表示第一对时报文的传输时延,dt2表示第二对时报文的传输时延,T1表示第一时间,T2表示第二时间,dt3表示第一对时报文的处理时延。
  6. 根据权利要求5所述的电能表的时钟同步方法,其特征在于,所述根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间,包括:
    预先获取所述报文组装时间以及时间校准报文的报文长度,根据所述时间校准报文的报文长度、所述物理链路的波特率以及时间校准报文在通信链路中的编码长度,得到所述时间校准报文的传输时延;
    所述时间校准报文中校准时间的计算公式为:
    T5=T4+dt3+dt4+dt5
    其中,T5表示所述时间校准报文中的校准时间,T4表示内部时钟记录发送所述时间校准报文的时间,所述dt4表示所述时间校准报文的传输时延,dt5表示预先确定的报文组装时间。
  7. 根据权利要求1至6任一项所述的电能表的时钟同步方法,其特征在于,所述获取绝对时间,包括:
    从一个基站获取绝对时间;
    或,获取多个基站的时间,从多个基站的时间中选择一个作为所述绝对时间;
    或,通过内部GPS模块或北斗模块获取绝对时间。
  8. 一种电能表的时钟同步装置,其特征在于,所述装置包括:
    内部对时模块,用于获取绝对时间,根据所述绝对时间对内部时钟对时;
    报文收发模块,用于通过预先设置的通信协议在第一时间向电能表发送第一对时报文,以及在第二时间接收电能表反馈的第二对时报文;所述第一时间、第二时间为内部时钟的时间;
    时延计算模块,用于根据所述第一时间、所述第二时间以及传输时延,得到所述第一对时报文的处理时延;根据所述处理时延、传输时延、预先确定的报文组装时间以及所述内部时钟的时间,得到校准时间;
    时钟同步模块,用于向所述电能表发送时间校准报文,所述时间校准报文中包含所述校准时间,以对所述电能表的本地时钟同步。
  9. 一种计算机设备,包括存储器和处理器,所述存储器存储有计算机程序,其特征在于,所述处理器执行所述计算机程序时实现权利要求1至7中任一项所述的方法的步骤。
  10. 一种计算机可读存储介质,其上存储有计算机程序,其特征在于,所述计算机程序被处理器执行时实现权利要求1至7中任一项所述的方法的步骤。
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