CN102608560A - Detection device for measuring accuracy of electric energy meter - Google Patents

Abstract

The invention discloses a detection device for the measurement accuracy of an electric energy meter, which comprises: a three-phase multifunctional standard meter, a program-controlled three-phase power source and a checked electric energy meter, the checked electric energy meter, the three-phase multifunctional standard meter and the programmed three-phase The phase power sources are connected by wires, the electric energy meter to be tested, the three-phase multi-functional standard meter and the program-controlled three-phase power source are connected to the multi-channel server through the RS485 communication port; the multi-channel server is connected to the detection processing system through Ethernet; The process requires current and voltage power sources, manual wiring for standard meters and tested meters, and manual recording of test data. The number of energy meters that can be completed each time is not large, and the efficiency is low.

Description

A detection device for measuring accuracy of electric energy meter

technical field

    The invention belongs to the field of instrumentation detection, and in particular relates to a detection device for the measurement accuracy of an electric energy meter.

Background technique

The measurement and monitoring function of the electric energy meter means that the electric energy meter should be able to measure, record, and display the operating parameters such as the total and phase-by-phase voltage, current, power, power factor, frequency, etc. of the current electric energy meter; the measurement accuracy requirements of the electric energy meter are: Voltage, current, and power measurement errors do not exceed ±1% reference error. At present, the measurement and monitoring accuracy test method of the electric energy meter uses the comparison method, that is, through an external high-precision standard indicating instrument, the voltage, current, and power of the electric energy meter under test and the standard indicating instrument voltage and current are measured at the same measurement point at the same time. , power, and the measurement error of the electric energy meter is obtained by calculation. However, there are obvious shortcomings in this existing detection method, which requires current and voltage power sources, manual wiring between the standard meter and the tested meter, and manual recording of test data. The number of electric energy meters that can be completed each time is not large, and the efficiency is high Low.

Contents of the invention

The technical problem to be solved by the present invention: Provide a detection device for the measurement accuracy of electric energy meters to solve the need for current and voltage power sources in the conventional detection process, the standard meter and the tested meter need to be manually connected, and the test data needs to be manually recorded , Each time the number of electric energy meters is small and the efficiency is low.

Technical scheme of the present invention:

A detection device for the measurement accuracy of an electric energy meter, which includes: a three-phase multifunctional standard meter, a program-controlled three-phase power source, and an inspected electric energy meter, and the inspected electric energy meter and the three-phase multifunctional standard meter communicate with the programmed three-phase power source Wire connection, the electric energy meter to be tested, the three-phase multifunctional standard meter and the program-controlled three-phase power source are connected to the multi-channel server through RS485 communication lines; the multi-channel server is connected to the detection and processing system through Ethernet.

The detection processing system includes:

The control function module controls the program-controlled three-phase power source, the watt-hour meter to be checked and the three-phase multi-function standard meter to start, shut down or set the hardware working state, and is electrically connected to the data reading function module;

The data reading function module reads the test data of the tested electric energy meter and the three-phase multi-function standard meter, sends them to the data processing function module for processing, and is electrically connected with the data processing function module;

The data processing functional module calculates the accuracy of the tested electric energy meter according to the test data of the three-phase multifunctional standard meter and the tested electric energy meter, and is electrically connected with the data storage and display functional module;

The data storage and display function module stores the test data and test results and displays them in real time through the computer software interface.

Beneficial effects of the present invention:

The present invention utilizes the power source of the electric energy meter verification device to realize the output of current, voltage and power, uses the three-phase multifunctional standard meter configured by the verification device as the standard device, and uses the computer to read the data of the tested electric energy meter and the three-phase multifunctional standard meter The current, voltage and power values are calculated by the detection and processing system to calculate the measurement accuracy of the electric energy meter under inspection. The tested electric energy meter, standard electric energy meter, program-controlled three-phase power source, etc. all use the existing electric energy meter verification device without adding additional hardware. The detection and processing system can be used to complete the test of the accuracy of the current, voltage and power measurement of the electric energy meter under inspection.

The advantages brought by the invention of this technology:

1. No need for additional equipment, use the existing three-phase multi-function standard meter, program-controlled three-phase power source and computer to realize the automatic test of the measurement accuracy of the electric energy meter, make full use of the existing equipment, and can also use Verify the protection function inside the device to make full use of the equipment.

2. Realize the automation of the test: realize the automatic control of the power source through the computer detection and processing system. The computer reads the current and voltage power data of the three-phase multi-function standard meter and the electric energy meter under inspection through the communication port, and uses the detection and processing system to calculate error, automatically judge the result, and realize fully automatic testing.

3. No additional wiring is required, and multi-epitope tests are performed at the same time. In this test method, after the verification wiring of the electric energy meter is completed, no external test line is required.

4. Test efficiency is improved: It takes 1 hour to complete the power consumption test of a three-phase electric energy meter by using an external standard instrument, but with this test device, it only takes 3 minutes to realize 16 electric energy meters. In the accuracy test, the present invention can simultaneously detect 16 electric energy meters to be tested, and the test efficiency is greatly improved.

The invention solves the problems that current and voltage power sources are required in the conventional detection process, manual wiring is required for the standard meter and the tested meter, test data needs to be manually recorded, the number of electric energy meters that can be completed each time is small, and the efficiency is low.

Description of drawings:

Fig. 1 is a control principle block diagram of the present invention;

Fig. 2 is a block diagram of the functional modules of the detection and processing system of the present invention.

Detailed ways:

A detection device for the measurement accuracy of an electric energy meter, which includes: a three-phase multifunctional standard meter, a program-controlled three-phase power source, and an inspected electric energy meter, and the inspected electric energy meter and the three-phase multifunctional standard meter communicate with the programmed three-phase power source Wire connection, the electric energy meter to be tested, the three-phase multifunctional standard meter and the program-controlled three-phase power source are connected to the multi-channel server through the RS485 communication port with RS485 communication lines; the multi-channel server is connected to the detection and processing system through Ethernet.

The watt-hour meter to be tested and the three-phase multifunctional standard meter provide voltage and current through a program-controlled three-phase power source, and are connected by cables; the multi-channel server selects the multi-channel server of model 2018-1, and the port on 2018-1 There are a total of 32 channels, of which 1-24 are meter RS485 communication ports, and 25-32 are control communication ports. The multi-channel server communicates with the tested electric energy meter, three-phase multi-function standard meter and program-controlled three-phase power source through the RS485 communication line. The connection realizes data communication. The multi-channel server and the computer of the detection processing system are connected by Ethernet, communicate through the UDP protocol, and send 645 frames to communicate with each table through UDP. In 2018-1, the multi-channel server has a total of 24 channels and the detected table. The RS485 communication interface for communication can simultaneously test 24 tested meters.

The detection processing system includes:

Control function module, send RS485 command parameter frame to control the program-controlled three-phase power source, the electric energy meter to be checked and the three-phase multi-function standard meter to start, shut down or set the hardware working state, and realize data connection with the data reading function module through data function call ;

The data reading function module collects the test data of the tested electric energy meter and the three-phase multi-function standard meter, sends them to the data processing function module for processing, and realizes data connection with the data processing function module through data function calls;

The data processing function module, according to the test data of the three-phase multi-functional standard meter and the tested electric energy meter, automatically calculates the accuracy of the tested electric energy meter, the calculation formula of the current (voltage) accuracy: the current (voltage) of the tested electric energy meter Subtract the current (voltage) of the three-phase multi-function standard meter, divide it by the quoted current (voltage) value of the three-phase multi-function standard meter, and multiply by 100%. The accuracy formula of power detection is: the power value of the electric energy meter under test Subtract the power value of the three-phase multi-function standard meter, divide by the power value of the three-phase multi-function standard meter and multiply by 100%, and realize the data connection with the data storage and display function module through the data function call;

The data storage and display function module stores the test data and test results and displays them in real time through the computer software interface. At the same time, the test data and test results can be printed through the printer.

Each functional module of the detection and processing system is compiled and solidified on the computer. After the wiring is completed according to the hardware connection method, the accuracy test of the tested meter can be automatically realized and the results can be automatically output.

Claims (2)

1. A detection device for the measurement accuracy of an electric energy meter, which comprises: a three-phase multifunctional standard meter, a program-controlled three-phase power source and a checked electric energy meter, characterized in that: the checked electric energy meter and the three-phase multifunctional standard meter are connected with The program-controlled three-phase power source is connected through wires, the electric energy meter to be tested, the three-phase multi-functional standard meter and the program-controlled three-phase power source are connected to the multi-channel server through RS485 communication lines; the multi-channel server is connected to the detection and processing system through Ethernet. 2. The detection device of a kind of electric energy meter measurement accuracy according to claim 1, is characterized in that: detection processing system comprises: The control function module controls the program-controlled three-phase power source, the watt-hour meter to be checked and the three-phase multi-function standard meter to start, shut down or set the hardware working state, and is electrically connected to the data reading function module; The data reading function module reads the test data of the tested electric energy meter and the three-phase multi-function standard meter, sends them to the data processing function module for processing, and is electrically connected with the data processing function module; The data processing functional module calculates the accuracy of the tested electric energy meter according to the test data of the three-phase multifunctional standard meter and the tested electric energy meter, and is electrically connected with the data storage and display functional module; The data storage and display function module stores the test data and test results and displays them in real time through the computer software interface.

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