CN102162841B - Method and system for detecting electric energy meter - Google Patents

Abstract

A method and system for detecting an electric energy meter, the method comprising: sending to the electric energy meter a time parameter setting instruction and/or a load simulation instruction including the number of electricity settlement n, the date of electricity settlement, and the time of the electric energy meter, so that the electric energy The meter generates the electricity information on the settlement date and the load simulation record information; sends the key command to the electric energy meter to obtain the energy information on the settlement day and the load simulation record information; receives the electric energy meter according to the key quantity command Send the response data including the settlement day electricity information and load simulation record information; analyze the settlement day electricity information and load simulation record information, and generate analysis results. The invention can automatically issue time parameter setting instructions and/or load simulation instructions to the electric energy meter to detect the electric energy meter, and solves the problems of low efficiency of manual operation and complicated detection process.

Description

Method and system for detecting electric energy meter

technical field

The invention relates to the testing technology of the electric energy meter, in particular to the detection method and system of the electric energy meter.

Background technique

When testing the electric energy meter, it is generally necessary to simulate possible states to test whether the electric energy meter meets the requirements in various states. There are usually two types of state simulation: time simulation and state simulation:

The content transmitted by "DL/T645-2007 Multi-function Energy Meter Communication Protocol" can be regarded as "slice" data at several different time points on the time horizontal axis. When performing time simulation, the selection of each time point is generally: freezing time point, settlement time point, last n occurrence time point, and current data point, as shown in Figure 1. Load simulation means that by controlling the voltage and current changes of the power supply, event data such as voltage loss, phase failure, and unbalance can be simulated.

The testing principle of the prior art is shown in Figure 2. First, the operator 204 operates the electric energy meter 202 to be tested, sets the time of the electric energy meter, and realizes the simulation at a certain time point; then the operator 204 operates the program-controlled power supply 203 to realize the load simulation . Repeat the above steps until all time point settings and events that occur at the corresponding time point are completed. Using a computer to imitate the data acquisition terminal 201, according to the pre-established plan, issue the key command (test data) to the electric energy meter under test, read the response data (detected data), and judge whether the response data meets the requirements of the communication protocol.

In the process of realizing the present invention, the inventor found that the above-mentioned existing simulation method has the following defects:

The above-mentioned simulation method completely relies on manual operation, which is labor-intensive and low-efficiency, and the compiled test process is complicated and prone to errors.

Contents of the invention

The purpose of the present invention is to provide a detection method and system for an electric energy meter, which solves the problems of low efficiency of manual operation, high labor intensity and complicated detection process.

In order to achieve the above object, the present invention provides a method for detecting an electric energy meter, the method comprising: sending to the electric energy meter a time parameter setting instruction and/or load including the number of electricity settlement n, the date of electricity settlement, and the time of the electric energy meter A simulation instruction, so that the electric energy meter generates settlement day electricity information and/or load simulation record information; sends an essential command to the electric energy meter to obtain the settlement day electricity information and/or load simulation record information; Receiving the response data sent by the electric energy meter according to the key number command, including the settlement day electricity information and/or load simulation record information; analyzing the settlement day electricity information and/or load simulation record information, and generating analysis results .

In order to achieve the above object, the present invention also provides an electric energy meter detection system, the system includes: a command sending unit, used to send to the electric energy meter the time including the number n of electricity settlement, the date of electricity settlement, and the time of the electric energy meter Parameter setting instructions and/or load simulation instructions, so that the electric energy meter generates settlement day electricity information and/or load simulation record information; an essential number command sending unit is used to send an essential number command to the electric energy meter to obtain The settlement day electricity information and/or load simulation record information; the response data receiving unit is used to receive the response containing the settlement day electricity information and/or load simulation record information sent by the electric energy meter according to the essential number command Data; a data analysis unit, configured to analyze the settlement day electricity information and/or load simulation record information in the response data, and generate an analysis result.

Beneficial technical effects of the embodiments of the present invention: the present invention can automatically issue time parameter setting instructions and/or load simulation instructions to the electric energy meter to detect the electric energy meter, which solves the problems of low manual operation efficiency and complicated detection process.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is a schematic diagram of time points selected during time simulation;

Fig. 2 is the test schematic diagram of prior art;

Fig. 3 is the schematic diagram of the electric energy meter detection system of the embodiment of the present invention;

4 is a schematic diagram of an electric energy meter detection platform according to an embodiment of the present invention;

Fig. 5 is the test schematic diagram of the embodiment of the present invention;

Fig. 6 is a flow chart of a method for detecting an electric energy meter according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The present invention provides a method and system for detecting an electric energy meter. The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

The present invention provides an electric energy meter detection system, as shown in FIG. 3 , the system includes: a command sending unit 301 , an essential command sending unit 302 , a response data receiving unit 303 and a data analysis unit 304 .

The instruction sending unit 301 is used to send the time parameter setting instruction and/or load simulation instruction including the electricity quantity settlement number n, the electricity quantity settlement date, and the time of the electric energy meter to the electric energy meter, so that the electric energy meter generates the electricity quantity information and /or load simulation logging information.

Preferably, the number of settlement days can be set to 3, and the settlement date is set to the 28th. It means that at 0 o'clock on the 28th of each month, a settlement is made, and the electricity data of the electric energy meter at that time is frozen and stored in the electric energy meter. The frozen electric energy data can be read by the freeze command in the electric energy meter. If the number of settlements is set to 3 times, such frozen power data will be saved 3 times.

The time of the energy meter can be set at a certain moment before the settlement date. For example, if a certain settlement date is September 28, 2009, the time of the electric energy meter can be set at 23:58 on September 27, 2009. The running time is set to 4 minutes, so the power data at 0 o'clock on September 28, 2009 will be frozen. In the embodiment of the present invention, the time of the electric energy meter can be set before each settlement date.

Load simulation commands include power loss, phase failure and/or three-phase unbalance commands, etc., output three-phase voltage and current according to command changes, simulate the actual situation on site, and create various events, so that the energy meter has voltage loss, phase failure and /or unbalanced (referring to voltage, current unbalanced) and so on.

The essential number command sending unit 302 is configured to send an essential number command to the electric energy meter, so as to obtain the electricity quantity information on the settlement day and/or the load simulation record information.

According to the time parameter setting instruction and/or the load simulation instruction, the electric energy meter generates the electricity quantity information on the settlement day and/or the load simulation record information, and records the electricity quantity data and the voltage loss, phase failure and/or three-phase unbalance information on the settlement day, For example, the power data recorded at the freezing point at 0 o'clock on September 28, 2009 is 52 degrees, and phase A of the ABC three-phase is disconnected at 0:05:23 on September 28, 2009.

The essential number command sending unit 302 sends an essential quantity command to the electric energy meter, instructing the electric energy meter to send recorded energy data on the settlement date and information such as voltage loss, phase failure and/or three-phase unbalance.

The response data receiving unit 303 is configured to receive the response data sent by the electric energy meter according to the key number command, including the settlement day electricity quantity information and/or the load simulation record information. The response data is the recorded electricity data on the settlement day and information such as voltage loss, phase failure and/or three-phase imbalance.

After the response data receiving unit 303 receives the response data, the data analysis unit 304 analyzes the settlement day electricity information and/or load simulation record information in the response data, and generates an analysis result.

The data analysis unit 304 is specifically used to compare whether the settlement day electricity in the settlement day electricity information is within the allowable electricity threshold range; compare the load simulation record time in the load simulation record information with the load simulation time in the load simulation instruction Is it consistent.

Fig. 4 is a schematic diagram of an electric energy meter detection platform according to an embodiment of the present invention. As shown in FIG. 4 , the test computer 401 includes a data detection module 402 for sending a load simulation instruction and a time parameter setting instruction to the electric energy meter. The time parameter setting instruction and the load simulation instruction are sent to the HUB through the network interface and the serial interface respectively, and the terminal server 407 converts the network interface into a serial port, and then sends the time parameter setting instruction to the electric energy meter 406 through the RS485 converter, and the electric energy meter 406 can There are more than one. The load simulation command can also be sent to the program-controlled three-phase power supply 405 through the serial interface to control the three-phase program-controlled power supply to perform operations such as phase failure and voltage loss, and to control the phase failure and voltage loss operations of the electric energy meter. The data detection module 402 also controls the analog master station (data acquisition terminal) 404 of the test computer 401 to send the essential command to the electric energy meter 406, and the electric energy meter 406 returns response data according to the essential command. The analog master station 404 receives the response data returned by the electric energy meter 406 , and sends it to the data detection module 402 to analyze the data, and then stores the analysis result and the response data in the database 403 .

Fig. 5 is a test principle diagram of the embodiment of the present invention; the difference between Fig. 5 and Fig. 2 is that Fig. 5 sends time parameter modification instructions and load simulation instructions to the electric energy meter through the data detection module 402 of the test computer. The upper part of the dotted line in Figure 5 is the data layer, and the lower part is the physical layer.

Fig. 6 is a flow chart of a method for detecting an electric energy meter according to an embodiment of the present invention; the method for detecting an electric energy meter will be described in detail below in conjunction with Fig. 5 and Fig. 6 . As shown in Figure 6, the described method includes:

Step S601: Send the time parameter setting instruction and/or load simulation instruction including the number of electricity settlement n, the date of electricity settlement, and the time of the electric energy meter to the electric energy meter, so that the electric energy meter generates electricity information and/or load on the settlement day Analog record information.

Preferably, the number of settlement days can be set to 3, and the settlement date is set to the 28th. It means that at 0 o'clock on the 28th of each month, a settlement is made, and the electricity data of the electric energy meter at that time is frozen and stored in the electric energy meter. The frozen electric energy data can be read by the freeze command in the electric energy meter. If the number of settlements is set to 3 times, such frozen power data will be saved 3 times.

The time of the energy meter can be set at a certain moment before the settlement date. For example, if a certain settlement date is September 28, 2009, the time of the electric energy meter can be set at 23:58 on September 27, 2009. The running time is set to 4 minutes, so the power data at 0 o'clock on September 28, 2009 will be frozen. In the embodiment of the present invention, the time of the electric energy meter can be set before each settlement date.

The time of the energy meter crossed 0:00 on September 28 (the settlement day freezing point) within 4 minutes of running, and ran until 0:2 on September 28. When the time crossed the settlement day freezing point, the system froze this point data. According to this method, the simulation spans 0 o'clock on October 28 and 0 o'clock on November 28 in sequence, thus forming data frozen for three settlement days. Such data is generally referred to as "historical data", and since such data is often stored continuously in categories, it can also be called "historical records". Through the artificial time setting, the generated "history record" can provide original test data for the test.

Load simulation commands include power loss, phase failure and/or three-phase unbalance commands, etc., output three-phase voltage and current according to command changes, simulate the actual situation on site, and create various events, so that the energy meter has a voltage loss (voltage drop to below 78% of the rated voltage for 1 minute), phase failure (cut off any one of the ABC three-phase output), current (cut off any one of the ABC three-phase currents to below 50% of the rated current, lasts for 1 minute) and voltage (off any one of the ABC three-phase voltage drops below 50% of the rated voltage, lasts for 1 minute) unbalanced events. The appearance of this type of data often means that an abnormality occurs and an alarm needs to be raised, so it is generally called "alarm event data". Since this type of data is stored continuously in chronological order, it can also be called an "alarm record".

Step S602: Sending an order command to the electric energy meter to obtain the electricity quantity information on the settlement day and/or the load simulation record information.

According to the time parameter setting instruction and/or the load simulation instruction, the electric energy meter generates the electricity quantity information on the settlement day and/or the load simulation record information, and records the electricity quantity data and the voltage loss, phase failure and/or three-phase unbalance information on the settlement day, For example, the power data recorded at the freezing point at 0 o'clock on September 28, 2009 is 52 degrees, and phase A of the ABC three-phase is disconnected at 0:05:23 on September 28, 2009. After the electric energy meter receives the order to count, it will send the recorded electricity data and information on the settlement day, such as voltage loss, phase failure and/or three-phase imbalance.

Step S603: receiving the response data sent by the electric energy meter according to the key quantity command, including the electricity quantity information on the settlement date and/or the load simulation record information;

The response data is the recorded electricity data on the settlement day and information such as voltage loss, phase failure and/or three-phase imbalance.

Step S604: Analyze the settlement day electricity information and/or load simulation record information, and generate an analysis result.

Analyzing the settlement day electricity information and/or load simulation record information includes: comparing whether the settlement day electricity information is consistent with the time parameter setting instruction; and/or comparing the load simulation record information with the Whether the load simulation instructions are consistent.

Comparing whether the settlement day electricity information is consistent with the time parameter setting instruction includes: comparing whether the settlement day electricity quantity in the settlement day electricity information is within the allowable electricity threshold range; comparing the load simulation record information with Whether the load simulation instruction is consistent includes: comparing whether the load simulation record time in the load simulation record information is consistent with the load simulation time in the load simulation instruction.

For example, the electric energy meter detection system can set the electric energy of the electric energy meter to change less than 10 degrees in one minute, assuming that the electric energy of the electric energy meter is 50 degrees at 23:58 on September 27, 2009, and the freezing point in the response data is September 28, 2009 The power data at 0 o'clock is 52 degrees, and the power change of the electric energy meter running for 2 minutes is 2 degrees, and the average change is 1 degree per minute, which is less than 10 degrees. Therefore, the electricity at 0 o'clock on September 28, 2009 is frozen in the response data of the electric energy meter. The data is within the allowable power threshold.

Connect the voltage input loop of the electric energy meter detection platform in Figure 4 in parallel with the voltage loop of the tested electric energy meter, connect the current loop of the device with its current loop in series, and connect the 485 communication line to it (not shown in Figure 4). The test computer 401 issues a command to start the power supply, and transmits it to the three-phase program-controlled power supply through a dedicated serial interface. The power supply provides working power for the electric energy meter under test, and the power supply energy meter collects the input AC voltage and current signals. The time parameter setting instructions and/or load simulation instructions issued by the test computer 401 are transmitted to the serial 485 interface of the electric energy meter under test, and the response data of the electric energy meter receiving the data to the download command passes through the above-mentioned channel, reverse Send it to the master station computer to complete a response process. The test computer 401 controls the program-controlled power supply, changes its output voltage and current signals, and simulates various actual situations that may occur on site, such as: loss of voltage, overvoltage, phase failure, three-phase imbalance, etc., the measured electric energy meter is accurate Accurately collect, analyze and record various situations that occur, and after sorting and saving the corresponding data by category, the energy meter will wait for the request data command issued by the master station. After the analog master station 201 receives the correct command, it transmits the data returned by the measured electric energy meter from the physical layer to the data detection module 402 of the data layer to analyze and process the data and generate corresponding analysis results; finally, a test is generated based on these analysis results Report.

Beneficial technical effects of the embodiments of the present invention: the present invention can automatically issue time parameter setting instructions and/or load simulation instructions to the electric energy meter to detect the electric energy meter, which solves the problems of low manual operation efficiency and complicated detection process.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be realized by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (6)

1. a kind of electric energy meter detection method is characterized in that, described method comprises: Sending a time parameter setting instruction and a load simulation instruction including the number of electricity settlement n, the date of electricity settlement, and the time of the electric energy meter to the electric energy meter, so that the electric energy meter generates electricity information on the settlement day and load simulation record information; Send a key command to the electric energy meter to obtain the electricity information on the settlement day and the load simulation record information; Receiving the response data sent by the electric energy meter according to the key number command, including the settlement day electricity quantity information and the load simulation record information; Analyzing the settlement day electricity information and load simulation record information, comparing whether the settlement day electricity information is consistent with the time parameter setting instruction, and comparing whether the load simulation record information is consistent with the load simulation instruction , and generate analysis results. 2. The method according to claim 1, wherein comparing whether the settlement day electricity information is consistent with the time parameter setting instruction comprises: Comparing whether the settlement day electric quantity in the settlement day electric quantity information is within the allowable electric quantity threshold range. 3. The method according to claim 1, wherein comparing whether the load simulation record information is consistent with the load simulation instruction comprises: Comparing whether the load simulation record time in the load simulation record information is consistent with the load simulation time in the load simulation instruction. 4. The method according to claim 1, wherein the load simulation command includes power loss, phase failure and/or three-phase unbalance command. 5. An electric energy meter detection system is characterized in that, described system comprises: An instruction sending unit, configured to send to the electric energy meter a time parameter setting instruction and a load simulation instruction including the number of electricity settlement n, the date of electricity settlement, and the time of the electric energy meter, so that the electric energy meter generates electricity information and load simulation on the settlement day record information; The key number command sending unit is used to send the key number command to the electric energy meter, so as to obtain the power information of the settlement day and the load simulation record information; The response data receiving unit is used to receive the response data sent by the electric energy meter according to the key number command, including the electricity quantity information on the settlement date and the load simulation record information; A data analysis unit, configured to analyze the settlement day electricity information and/or load simulation record information in the response data, that is, compare whether the settlement day electricity quantity in the settlement day electricity information is within the allowable electricity threshold range, compare the Whether the load simulation record time in the load simulation record information is consistent with the load simulation time in the load simulation instruction, and generate analysis results. 6. The system according to claim 5, wherein the load simulation command includes a power loss, phase failure and/or three-phase unbalanced command.

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