CN216870789U - Intelligent electric energy meter harmonic electric energy testing device - Google Patents
Intelligent electric energy meter harmonic electric energy testing device Download PDFInfo
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- CN216870789U CN216870789U CN202122761135.8U CN202122761135U CN216870789U CN 216870789 U CN216870789 U CN 216870789U CN 202122761135 U CN202122761135 U CN 202122761135U CN 216870789 U CN216870789 U CN 216870789U
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Abstract
The utility model relates to a testing device for harmonic electric energy of an intelligent electric energy meter, which is mainly applied to the technical field of electric energy meter testing. The technical scheme of the utility model is as follows: the device comprises an intelligent electric energy meter harmonic wave electric energy testing device and an electric energy meter installation position, wherein the electric energy meter installation position is used for installing an electric energy meter to be tested; the electric energy meter inspection device outputs a voltage and current signal to the electric energy meter to be inspected on one hand, and outputs a standard pulse signal corresponding to the voltage and current signal to an error detector on the other hand; the error detector is used for receiving a pulse signal sent by a harmonic pulse lamp of the electric energy meter to be detected and a pulse signal sent by the electric energy meter detection device, comparing the difference value between the pulse signal and the pulse signal, and transmitting the difference value to the main control unit; the main control unit is connected with the electric energy meter to be tested through RS485 to read the address of the electric energy meter to be tested, and is connected with the electric energy meter testing device through RS232 to send the obtained address of the electric energy meter to be tested to the electric energy meter testing device.
Description
Technical Field
The utility model relates to the technical field of electric energy meter testing, in particular to a testing device for harmonic electric energy of an intelligent electric energy meter.
Background
At present, most of intelligent electric energy meters only can provide simple harmonic signals based on measurement of fundamental wave electric energy, and generally only have the test quantities of harmonic content, harmonic phase angle and harmonic power without the requirement of harmonic electric energy. In recent years, the south network IR46 dual-core three-phase intelligent electric energy meter clearly puts forward the requirement of harmonic electric energy and needs to test the accuracy of the harmonic electric energy. Therefore, research and development of a testing device capable of realizing harmonic electric energy of an intelligent electric energy meter is urgently needed.
Disclosure of Invention
The utility model aims to provide a testing device for harmonic electric energy of an intelligent electric energy meter aiming at the problems.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
a testing device for harmonic electric energy of an intelligent electric energy meter comprises an electric energy meter installation position, an electric energy meter testing device, an error detector and a main control unit, wherein,
the device comprises an electric energy meter installation position, an error detector and a harmonic pulse lamp, wherein the electric energy meter installation position is used for installing an electric energy meter to be detected, and after the electric energy meter to be detected is installed at the electric energy meter installation position, the harmonic pulse lamp of the electric energy meter to be detected is over against a pulse acquisition port of the error detector; therefore, after the ammeter to be tested is installed, the harmonic electric energy can be tested without any adjustment, and the operation steps are simplified;
the electric energy meter inspection device is connected with an electric energy meter to be inspected on one hand and used for outputting a voltage and current signal to the electric energy meter to be inspected on the other hand, and is connected with the error detector on the other hand and used for outputting a standard pulse signal corresponding to the voltage and current signal to the error detector;
the error detector is used for receiving a pulse signal sent by a harmonic pulse lamp of the electric energy meter to be detected and a pulse signal sent by the electric energy meter detection device, comparing the difference value between the pulse signal and the pulse signal, and transmitting the difference value to the main control unit;
the main control unit is connected with the electric energy meter to be tested through RS485 to read the address of the electric energy meter to be tested, and is connected with the electric energy meter testing device through RS232 to send the obtained address of the electric energy meter to be tested to the electric energy meter testing device to ensure that the voltage and current signals are sent to the electric energy meter to be tested.
Preferably, the pulse signal emitted by the harmonic pulse lamp of the electric energy meter to be tested is an optical pulse signal or an electric pulse signal.
Preferably, the main control unit is further configured to read, from the electric energy meter to be tested, a variation of the harmonic electric energy after the electric energy meter receives the voltage and current signal.
Preferably, the error detector is arranged in the electric energy meter checking device.
The utility model has the beneficial effects that: the testing device can be used for verifying the accuracy of 2-40 times of harmonic electric energy, testing 2-level harmonic electric energy of a south-network (south-power-grid) IR46 double-core electric energy meter and ensuring the correct measurement of the harmonic electric energy of the electric energy meter.
Drawings
FIG. 1 is a block diagram of the present invention.
FIG. 2 is a flow chart of the practical application of the testing device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will be made clearly and completely in conjunction with the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
As shown in fig. 1, the testing device for harmonic electric energy of an intelligent electric energy meter of the utility model comprises an electric energy meter installation position 1, an electric energy meter testing device 2, an error detector 3 and a main control unit 4; the main control unit 4 is respectively connected with the electric energy meter inspection device 2, the error detector 3 and the electric energy meter to be tested which is arranged on the electric energy meter installation position 1; the error detector 3 is respectively connected with the electric energy meter inspection device 2 and the electric energy meter to be tested which is arranged on the electric energy meter installation position 1; the electric energy meter inspection device 2 is connected with the electric energy meter to be tested which is arranged on the electric energy meter installation position 1.
The electric energy meter mounting position 1 is used for mounting an electric energy meter to be tested, and after the electric energy meter to be tested is mounted at the electric energy meter mounting position, a harmonic pulse lamp of the electric energy meter to be tested is over against a pulse acquisition port of the error detector 3; therefore, after the electric meter to be tested is installed, the harmonic electric energy can be tested without any adjustment, and the operation steps are simplified.
The electric energy meter inspection device 2 is connected with the electric energy meter to be inspected on the one hand, and is used for outputting a voltage and current signal to the electric energy meter to be inspected so that the electric energy meter to be inspected moves according to the voltage and current signal; and on the other hand, the voltage detection circuit is connected with the error detector 3, and outputs the standard pulse signal corresponding to the voltage and current signal to the error detector 3.
And the error detector 3 is used for receiving a pulse signal sent by a harmonic pulse lamp of the electric energy meter to be detected and a pulse signal sent by the electric energy meter inspection device 2, comparing a difference value between the pulse signal and the pulse signal, and transmitting the difference value to the main control unit 4. Specifically, the pulse signal that the harmonic pulse lamp of the electric energy meter to be measured sent is: after receiving the voltage and current signals, the electric energy meter to be tested generates pulse signals by walking, wherein the pulse signals are optical pulse signals or electric pulse signals; the pulse signals sent by the electric energy meter inspection device 2 are as follows: and the voltage and current signals correspond to standard pulse signals. Assuming that the number of pulses of the standard pulse signal corresponding to the voltage and current signal is 1000, and the number of pulses of the pulse signal generated by the running of the electric energy meter to be tested after receiving the voltage and current signal is 998, the difference between the two pulses is 2, and the error detector 3 feeds back the difference to the main control unit 4. In this embodiment, the electric energy meter inspection device 2 is a new generation three-phase IR46 multi-core intelligent electric energy meter inspection device with the model of PTC-8320H, which is manufactured by zhejiang culvert general electric power technology limited company, and the error detector 3 is arranged in the electric energy meter inspection device 2, so that the cleanness of the table top of the device can be ensured, and the occupied space of the table top can be reduced.
The main control unit 4 is connected with the electric energy meter to be tested through the RS485 interface to read the address of the electric energy meter to be tested, and is connected with the electric energy meter inspection device 2 through the RS232 interface to send the acquired address of the electric energy meter to be tested to the electric energy meter inspection device 2, and the electric energy meter inspection device 2 sends the voltage and current signals to the electric energy meter to be tested according to the received address. In this example, the main control unit 4 is a computer, and can normally communicate with the electric energy meter inspection device 2, the error detector 3, and the electric energy meter to be tested.
In a preferred embodiment, the main control unit 4 is further configured to read, from the electric energy meter to be tested, a variation of the harmonic electric energy after the electric energy meter to be tested receives the voltage and current signal.
As shown in fig. 2, the step of testing the harmonic electric energy by using the testing apparatus for the harmonic electric energy of the intelligent electric energy meter of the embodiment includes:
step 1, the electric energy meter to be tested is installed at the electric energy meter installation position 1, so that the harmonic pulse lamp of the electric energy meter to be tested is over against the pulse acquisition port of the error detector 3. The electric energy meter inspection device 2 is in normal on-line communication with the main control unit 4.
And 2, recording the initial value of the harmonic electric energy of the electric energy meter to be tested before starting the harmonic electric energy character walking test.
And 3, starting a test, and automatically finishing the test when the word quantity of the standard pulse signal harmonic electric energy reaches a set value.
And 4, reading the current harmonic wave electric energy value of the electric energy meter to be tested after the test is finished.
And 5, analyzing the difference value between the harmonic electric energy increment of the electric energy meter to be tested and the theoretical value of the standard meter, and finishing the test of the scheme.
The testing device provided by the utility model is used for carrying out primary 5-order harmonic electric energy wording 0.03KWH verification, the actual increment of the harmonic electric energy is 0.0299KWH, the error of the harmonic electric energy is 0.33%, the requirement of 2-level harmonic electric energy is met, and the testing method is effective and correct.
Claims (4)
1. The utility model provides a testing arrangement of intelligent ammeter harmonic electric energy which characterized in that: comprises an electric energy meter installation position (1), an electric energy meter inspection device (2), an error detector (3) and a main control unit (4),
the electric energy meter mounting position (1) is used for mounting an electric energy meter to be tested, and after the electric energy meter to be tested is mounted at the electric energy meter mounting position, a harmonic pulse lamp of the electric energy meter to be tested is over against a pulse acquisition port of the error detector (3);
the electric energy meter inspection device (2) is connected with the electric energy meter to be inspected on one hand and used for outputting voltage and current signals to the electric energy meter to be inspected on the other hand, is connected with the error detector (3) and outputs standard pulse signals corresponding to the voltage and current signals to the error detector (3);
the error detector (3) is used for receiving a pulse signal sent by a harmonic pulse lamp of the electric energy meter to be detected and a pulse signal sent by the electric energy meter inspection device (2), comparing the difference value between the pulse signal and the pulse signal, and transmitting the difference value to the main control unit (4);
the main control unit (4) is connected with the electric energy meter to be tested through RS485 on the one hand to read the address of the electric energy meter to be tested, and is connected with the electric energy meter inspection device (2) through RS232 on the other hand to send the acquired address of the electric energy meter to be tested to the electric energy meter inspection device (2) to ensure that the voltage and current signals are sent to the electric energy meter to be tested.
2. The testing device for harmonic electric energy of intelligent electric energy meter according to claim 1, characterized in that: and the pulse signal sent by the harmonic pulse lamp of the electric energy meter to be tested is an optical pulse signal or an electric pulse signal.
3. The testing device for harmonic electric energy of intelligent electric energy meter according to claim 1, characterized in that: the main control unit is also used for reading the variable quantity of the harmonic electric energy after the electric energy meter to be tested receives the voltage and current signals from the electric energy meter to be tested.
4. The testing device for harmonic electric energy of intelligent electric energy meter according to claim 1, characterized in that: the error detector (3) is arranged in the electric energy meter inspection device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122761135.8U CN216870789U (en) | 2021-11-11 | 2021-11-11 | Intelligent electric energy meter harmonic electric energy testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122761135.8U CN216870789U (en) | 2021-11-11 | 2021-11-11 | Intelligent electric energy meter harmonic electric energy testing device |
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| Publication Number | Publication Date |
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| CN216870789U true CN216870789U (en) | 2022-07-01 |
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| CN202122761135.8U Active CN216870789U (en) | 2021-11-11 | 2021-11-11 | Intelligent electric energy meter harmonic electric energy testing device |
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2021
- 2021-11-11 CN CN202122761135.8U patent/CN216870789U/en active Active
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