Electric energy meter protocol detection and meter reading method based on intelligent measurement terminal

Abstract

The invention discloses an intelligent measurement terminal-based electric energy meter protocol detection and meter reading method, which relates to the technical field of electric energy meter verification, and comprises the following steps of: 1, preparing a 645 detection message containing multiple data items; step 2, sending a detection message to the electric energy meter; 3, receiving a check reply message, determining the protocol type of the electric energy meter, and storing detection parameters; 4, preparing an electric energy meter 645 reading message according to the electric energy meter protocol type; and step 5, detecting the changed electric energy meters in the transformer area and updating detection parameters. According to the detection method, the execution of a periodic meter reading task of the intelligent measurement terminal is not influenced, the accuracy and timeliness of a detection result can be ensured by active periodic detection and emergency detection, and the high-efficiency meter reading characteristic of a DL / T645-2021 protocol electric energy meter and the high-performance advantage of the intelligent measurement terminal are fully utilized by performing sub-protocol meter reading based on the detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of watt-hour meter verification, and in particular to a watt-hour meter protocol detection and meter reading method based on an intelligent measurement terminal. Background Art

[0002] With the introduction of watt-hour meters compliant with the DL / T645-2021 protocol, there is currently a situation where watt-hour meters compliant with the DL / T645-2021 protocol and those compliant with the DL / T645-2007 protocol are used in combination in low-voltage distribution substations in China. There are some differences between the two types of watt-hour meters in receiving and sending 645 messages, specifically: watt-hour meters compliant with the DL / T645-2007 protocol only support receiving and sending 645 messages containing a single data item, while watt-hour meters compliant with the DL / T645-2021 protocol support both receiving and sending 645 messages containing a single data item and those containing multiple data items.

[0003] However, for the current situation of the combined use of the two types of watt-hour meters in low-voltage distribution substations, in order to be compatible with the feature that watt-hour meters compliant with the DL / T645-2007 protocol only support receiving and sending 645 messages containing a single data item, the intelligent measurement terminal sends 645 messages containing a single data item to all watt-hour meters in the low-voltage distribution substation during meter reading. This results in the inability to efficiently utilize the advantage of the multi-data-item 645 message reading of watt-hour meters compliant with the DL / T645-2021 protocol, and also fails to fully utilize the high CPU performance of the intelligent measurement terminal, and the meter reading efficiency has not been improved as it should be. For example: in a certain low-voltage distribution substation, there are 500 watt-hour meters, including 100 watt-hour meters compliant with the DL / T645-2007 protocol and 400 watt-hour meters compliant with the DL / T645-2021 protocol. When the terminal reads the data of 500 watt-hour meters (for example, 3 data items need to be read for each meter), it needs to send and receive approximately 1500 645 messages (1500 645 messages containing a single data item). If the feature that watt-hour meters compliant with the DL / T645-2021 protocol can recognize 645 messages containing multiple data items is fully utilized, only approximately 700 messages need to be sent and received (including 300 single-data-item 645 messages and 400 645 messages containing 3 data items), and the meter reading efficiency can be significantly improved, and the intelligent measurement terminal will have extra time to collect and process more types of data. Summary of the Invention

[0004] In view of the deficiencies and defects existing in the prior art, the present invention provides a method for detecting electric energy meter protocols and reading meters based on an intelligent measurement terminal. Without affecting the execution of the periodic meter reading task of the intelligent measurement terminal, this method conducts active periodic detection and emergency detection on two types of protocol electric energy meters. The detection message uses a 645 message containing multiple data items to accurately distinguish between the DL / T645-2007 protocol electric energy meter and the DL / T645-2021 protocol electric energy meter. After the detection is completed, the detection data is saved and updated to the file database. When reading this electric energy meter in the current period and the next period, determine what kind of 645 reading message to prepare according to the detection parameters in the database, improve the meter reading efficiency, and assist in the operation of the power grid meter reading.

[0005] The object of the present invention can be achieved through the following technical solutions:

[0006] A method for detecting electric energy meter protocols and reading meters based on an intelligent measurement terminal, comprising the following steps:

[0007] Step 1: During the detection time stage of the current electric energy meter protocol detection period, determine whether the periodic meter reading task of the intelligent measurement terminal is in execution according to the prepared data item flag and the storage flag. If it is in execution, no detection is performed. If it is not in execution, prepare a 645 detection message containing multiple data items.

[0008] Step 2: During the detection time stage, send the detection message every 15 minutes, and send it to 10 electric energy meters in sequence. When the number is less than 10, the number of sent meters is the number of remaining electric energy meters.

[0009] Step 3: The intelligent measurement terminal waits to receive the 645 message replied by the electric energy meter. If the reply message is not received within the waiting timeout period, the detection parameters of this electric energy meter will not be updated in the file database, and this electric energy meter will be re-detected in the supplementary detection stage. If the reply message is received within the waiting timeout period, parse the message and check the frame structure. If the frame structure of the reply message is a multi-data item 645 message frame structure, determine that this electric energy meter is a DL / T645-2021 standard electric energy meter, and in other cases, determine it as a DL / T645-2007 standard electric energy meter.

[0010] Step 4: When preparing the current electric energy meter reading message during the execution of the current meter reading cycle task of the intelligent measurement terminal, determine whether to prepare a 645 message containing multiple data items and a 645 message containing a single data item according to the electric energy meter protocol type in the file database, and send the message to this electric energy meter.

[0011] Step 5: When a certain electricity meter in the substation area changes, the meter reading layer of the intelligent measurement terminal receives the message sent by the application layer. When the periodic meter reading task of the intelligent measurement terminal is not executed and after the electricity meter being detected is detected, it prepares a detection message and sends the detection message to the changed electricity meter. If a reply message is received, the detection parameters are updated in the file database. If no reply message is received, a supplementary detection is performed in the supplementary detection stage.

[0012] Further, in the above Step 1, the electricity meter protocol detection period is 1 day, the start time of the detection time stage is 8 o'clock, and the end time is 23 o'clock.

[0013] Further, in the above Step 1, the number of data items in the 645 detection message is 2, and the data items are the forward active total electricity energy and the reverse active total electricity energy that both types of protocol electricity meters support for reading.

[0014] Further, in the above Step 1, the electricity meter detection order is ascending, and the ascending basis is the measurement point number of the electricity meter.

[0015] Further, in the above Step 1, when both the prepared data item flag and the storage flag are 0, it indicates that the periodic meter reading task of the intelligent measurement terminal is not being executed. When the prepared data item flag and the storage flag are not all 0, it indicates that the periodic meter reading task of the intelligent measurement terminal is being executed;

[0016] Further, in the above Step 2, if the intelligent measurement terminal does not detect 10 electricity meters within the current 15 - minute period, it immediately stops detecting the electricity meters that have not been detected among these 10 electricity meters, preferentially executes the meter reading task, and the electricity meters that have not been detected are detected in the supplementary detection stage;

[0017] Further, in the above Step 3, the value of the waiting timeout is determined according to the electricity meter type. The waiting timeout for 485 electricity meters is 60s, and the waiting timeout for carrier electricity meters is 600s;

[0018] Further, in the above Step 3, there are 2 detection parameters for the electricity meter, namely the electricity meter protocol type and the detection result determination time;

[0019] Further, the supplementary detection stage in step 3 is included within the power meter protocol detection time stage. However, it is necessary to wait until all power meters in the substation area have been detected once before detecting the power meters that were not successfully detected in this cycle. The basis for screening the power meters that were not successfully detected in this cycle is the detection result determination time in the detection parameters. If the detection result determination time is included within the detection time period of this cycle, it indicates that this power meter has been detected in this cycle. If the detection result determination time is not included within the detection time period of this cycle, it indicates that this power meter has not been detected in this cycle; During the supplementary detection stage, a detection message is sent every 15 minutes, and each time 10 power meters are sent. When the number is less than 10, the number sent is the number of remaining power meters to be supplemented; The detection order of power meters in the supplementary detection stage is ascending, and the ascending basis is the measurement point number of the power meter;

[0020] Further, the main function of the detection time in step 3 is to determine which power meters need to be detected and supplemented based on the detection time and the current time of the intelligent metering terminal;

[0021] Further, the number of data items in the 645 message containing multiple data items in step 4 is determined according to the number of data items to be read and the maximum byte length of the data field in the 645 message protocol;

[0022] Further, the power meter change in step 5 refers to the replacement and addition of power meters.

[0023] The beneficial effects of the present invention are as follows: The detection method does not affect the execution of the periodic meter reading task of the intelligent metering terminal; The detection method is active periodic detection and emergency detection, ensuring the accuracy and timeliness of the detection results; Based on the detection results, sub-protocol meter reading makes full use of the high-efficiency meter reading characteristics of DL / T645-2021 protocol power meters and the high-performance advantages of intelligent metering terminals. Description of the Drawings

[0024] Figure 1 It is the main flowchart of the power meter protocol detection and meter reading method described in the present invention.

[0025] Figure 2 It is the specific flowchart of active detection in the power meter protocol detection method described in the present invention.

[0026] Figure 3 It is the specific flowchart of determining the power meter protocol type in the power meter protocol detection method described in the present invention.

[0027] Figure 4 It is the specific flowchart of the supplementary detection stage in the power meter protocol detection method described in the present invention.

[0028] Figure 5 It is the specific flowchart of the sub-protocol meter reading method of the power meter described in the present invention.

[0029] Figure 6 This is the specific flowchart for detection after the electricity meter change in the electricity meter protocol detection method of the present invention. Specific Embodiments

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0031] The following further describes the present invention with reference to the accompanying drawings. The following content is only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention. Among them, Step 1 and Step 2 are combined with the attached Figure 2 , Step 3 is combined with the attached Figure 3 , the attached Figure 4 , Step 4 is combined with the attached Figure 5 , Step 5 is combined with the attached Figure 6 .

[0032] An electricity meter protocol detection and meter reading method based on an intelligent metering terminal includes the following steps:

[0033] Step 1: During the detection time stage of the current electricity meter protocol detection cycle, judge whether the periodic meter reading task of the intelligent metering terminal is in execution according to the prepared data item flag and the storage flag. If it is in execution, no detection is performed. If it is not in execution, prepare a 645 detection message containing multiple data items.

[0034] Step 2: Send the detection message every 15 minutes during the detection time stage, and send it to 10 electricity meters in sequence. When the number is less than 10, the number of sent meters is the number of remaining electricity meters.

[0035] Step 3: The intelligent metering terminal waits to receive the 645 message replied by the electricity meter. If no reply message is received within the waiting timeout period, the detection parameters of this electricity meter will not be updated in the file database, and this electricity meter will be re-detected in the supplementary detection stage. If a reply message is received within the waiting timeout period, parse and frame structure check the message. If the frame structure of the reply message is a multi-data item 645 message frame structure, it is determined that this electricity meter is a DL / T 645-2021 standard electricity meter, and in other cases, it is determined as a DL / T 645-2007 standard electricity meter.

[0036] Step 4: When preparing the current electricity meter reading message during the execution of the current meter reading cycle task of the intelligent metering terminal, judge whether to prepare a multi-data item 645 message and a single-data item 645 message according to the electricity meter protocol type in the file database, and send the message to this electricity meter.

[0037] Step 5: When a certain electricity meter in the substation area changes, the meter reading layer of the intelligent measurement terminal receives the message sent by the application layer. When the periodic meter reading task of the intelligent measurement terminal is not executed and after the electricity meter being detected is detected, it prepares a detection message and sends the detection message to the changed electricity meter. If a reply message is received, the detection parameters are updated in the file database. If no reply message is received, supplementary detection is carried out in the supplementary detection stage.

[0038] Further, in Step 1, the detection period of the electricity meter protocol is 1 day, and the start time of the detection time stage is 8:00 and the end time is 23:00.

[0039] Further, in Step 1, the number of data items in the 645 detection message is 2, and the data items are the forward active total electricity energy and the reverse active total electricity energy that both types of protocol electricity meters support for reading.

[0040] Further, in Step 1, the detection order of the electricity meters is ascending, and the ascending benchmark is the measurement point number of the electricity meters.

[0041] Further, in Step 1, when both the prepared data item flag and the storage flag are 0, it indicates that the periodic meter reading task of the intelligent measurement terminal is not being executed. When the prepared data item flag and the storage flag are not all 0, it indicates that the periodic meter reading task of the intelligent measurement terminal is being executed;

[0042] Further, in Step 2, if the intelligent measurement terminal does not detect 10 electricity meters within the current 15 - minute period, it immediately stops detecting the electricity meters that have not been detected among these 10 electricity meters, gives priority to executing the meter reading task, and the electricity meters that have not been detected are detected in the supplementary detection stage;

[0043] Further, in Step 3, the value of the waiting timeout is determined according to the type of electricity meter. The waiting timeout for 485 electricity meters is 60s, and the waiting timeout for carrier electricity meters is 600s;

[0044] Further, in Step 3, there are 2 detection parameters for the electricity meters, namely the electricity meter protocol type and the detection result determination time;

[0045] Further, the supplementary detection phase in step 3 is included within the power meter protocol detection time phase. However, it is necessary to wait until all power meters in the substation area have been detected once before detecting the power meters that were not successfully detected in this cycle. The basis for screening the power meters that were not successfully detected in this cycle is the detection result determination time in the detection parameters. If the detection result determination time is included within the detection time period of this cycle, it indicates that this power meter has been detected within this cycle. If the detection result determination time is not included within the detection time period of this cycle, it indicates that this power meter has not been detected within this cycle; during the supplementary detection phase, a detection message is sent every 15 minutes, and each time 10 power meters are sent. When the number is less than 10, the number sent is the number of remaining power meters to be supplemented; the detection order of power meters in the supplementary detection phase is ascending, and the ascending basis is the measurement point number of the power meter;

[0046] Further, the main function of the detection time in step 3 is to determine which power meters need to be detected and supplemented based on the detection time and the current time of the intelligent metering terminal;

[0047] Further, the number of data items in the 645 message containing multiple data items in step 4 is determined according to the number of data items to be read and the maximum byte length of the data field in the 645 message protocol;

[0048] Further, the power meter change in step 5 refers to the replacement and addition of power meters.

[0049] The above embodiments are illustrative of the specific implementation manners of the present invention, rather than limitations thereof. Those skilled in the relevant technical fields can make various transformations and changes without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A method for detecting electricity meter protocol and meter reading based on an intelligent measurement terminal, characterized in that, Including: Step 1: During the detection time phase of the current electricity meter protocol detection cycle, judge whether the periodic meter reading task of the intelligent measurement terminal is in execution according to the prepared data item flag and the storage flag. If it is in execution, no detection is performed. If it is not in execution, prepare a 645 detection message containing multiple data items. Step 2: During the detection time phase, send the detection message every 15 minutes to 10 electricity meters in sequence. When the number of electricity meters is less than 10, the number of sent meters is the number of remaining electricity meters. Step 3: The intelligent measurement terminal waits to receive the 645 message replied by the electricity meter. If no reply message is received within the waiting timeout period, the detection parameters of this electricity meter will not be updated in the file database, and this electricity meter will be re-detected in the re-detection phase. If a reply message is received within the waiting timeout period, the message is parsed and the frame structure is verified. If the frame structure of the reply message is a multi-data item 645 message frame structure, this electricity meter is determined to be a DL / T 645-2021 standard electricity meter; otherwise, it is determined to be a DL / T 645-2007 standard electricity meter. Step 4: When preparing the current electricity meter reading message during the execution of the current meter reading cycle task of the intelligent measurement terminal, judge whether to prepare a multi-data item 645 message and a single-data item 645 message according to the electricity meter protocol type in the file database, and send the message to this electricity meter. Step 5: When a certain electricity meter in the substation area changes, the meter reading layer of the intelligent measurement terminal receives the message sent by the application layer. When the periodic meter reading task of the intelligent measurement terminal is not in execution and the detection of the electricity meters being detected is completed, prepare a detection message and send it to the changed electricity meter. If a reply message is received, update the detection parameters in the file database. If no reply message is received, re-detect it in the re-detection phase.

2. The method for detecting and reading the electricity meter protocol based on the intelligent measurement terminal according to claim 1, characterized in that: In Step 1, the data items in the 645 detection message are the forward active total electricity and the reverse active total electricity that both types of protocol electricity meters support for reading.

3. A method for detecting and reading electricity meter protocols based on an intelligent measurement terminal according to claim 1, characterized in that: In Step 1, the detection order of the electricity meters is ascending, and the ascending reference is the measurement point number of the electricity meter.

4. A method for detecting and reading electricity meter protocols based on an intelligent measurement terminal according to claim 1, characterized in that: In Step 1, when both the prepared data item flag and the storage flag are 0, it indicates that the periodic meter reading task of the intelligent measurement terminal is not in execution. When the prepared data item flag and the storage flag are not all 0, it indicates that the periodic meter reading task of the intelligent measurement terminal is in execution.

5. A method for detecting and reading electricity meter protocols based on an intelligent measurement terminal according to claim 1, characterized in that: In Step 2, if the intelligent measurement terminal does not complete the detection of 10 electricity meters within the current 15-minute cycle, immediately stop detecting the uncompleted electricity meters among these 10 electricity meters, give priority to executing the meter reading task, and re-detect the uncompleted electricity meters in the re-detection phase.

6. The method for detecting and reading electricity meter protocols based on an intelligent measurement terminal according to claim 1, wherein: In Step 3, there are 2 detection parameters for the electricity meter, namely the electricity meter protocol type and the detection result determination time.

7. A method for detecting and reading electricity meter protocols based on an intelligent measurement terminal according to claim 1, characterized in that: In step 3, the supplementary detection phase is included in the detection time phase of the electricity meter protocol. However, it is necessary to wait until all electricity meters in the substation area have been detected once before detecting the electricity meters that were not successfully detected in this cycle. The basis for screening the electricity meters that were not successfully detected in this cycle is the detection result determination time in the detection parameters. If the detection result determination time is included in the detection time period of this cycle, it indicates that this electricity meter has been detected in this cycle. If the detection result determination time is not included in the detection time period of this cycle, it indicates that this electricity meter has not been detected in this cycle. During the supplementary detection phase, a detection message is sent every 15 minutes, and each time 10 electricity meters are sent. When the number is less than 10, the number of electricity meters sent is the number of remaining electricity meters to be supplemented. The detection order of electricity meters in the supplementary detection phase is ascending, and the ascending basis is the measurement point number of the electricity meter.

8. A method for detecting electricity meter protocol and meter reading based on an intelligent measurement terminal according to claim 1, characterized in that: In step 3, it is determined whether the electricity meter needs to be detected and supplemented according to the detection time and the current time of the intelligent measurement terminal.

9. A method for detecting and reading electricity meter protocols based on an intelligent measurement terminal according to claim 1, characterized in that: In step 4, the number of data items in the 645 message containing multiple data items is determined according to the number of data items to be read and the maximum byte length of the data field in the 645 message protocol.

10. A method for detecting and reading electricity meter protocols based on an intelligent measurement terminal according to claim 1, characterized in that: In step 5, the electricity meter change refers to the replacement and addition of the electricity meter.

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