CN215005567U - Broadband carrier module with electricity stealing prevention detection function - Google Patents
Broadband carrier module with electricity stealing prevention detection function Download PDFInfo
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- CN215005567U CN215005567U CN202120212525.7U CN202120212525U CN215005567U CN 215005567 U CN215005567 U CN 215005567U CN 202120212525 U CN202120212525 U CN 202120212525U CN 215005567 U CN215005567 U CN 215005567U
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Abstract
The utility model relates to an intelligence electric energy meter technical field, concretely relates to broadband carrier module who possesses anti-electricity-theft detection function, including setting up first current transformer that is used for the current sampling and the first voltage sampling network that is used for voltage sampling, the connection at intelligence electric energy meter inlet wire end respectively first current transformer's first micropower wireless communication module, setting are in HPLC communication module on the intelligence electric energy meter, the last increase of HPLC communication module is provided with second micropower wireless communication module, first voltage sampling network is connected to through AD conversion module second micropower wireless communication module, second micropower wireless communication module connects HPLC communication module, first micropower wireless communication module, second micropower wireless communication module, HPLC communication module bind the identity when the installation. The utility model discloses realize intelligent ammeter measurement error and anti-electricity-theft on-line monitoring.
Description
Technical Field
The utility model relates to an intelligence electric energy meter technical field, concretely relates to broadband carrier module that possesses anti-electricity-theft detection function.
Background
The intelligent electric energy meter consists of a measuring unit, a data processing unit, a communication unit and the like, and has the functions of electric energy metering, data processing, real-time monitoring, automatic control, information interaction, HPLC communication and the like.
The working principle of the existing intelligent electric energy meter is as follows: the measured alternating voltage and current respectively complete voltage signal and current signal sampling through the resistance voltage-dividing network and the manganin shunt, the sampled signals are sent to the metering chip, the metering chip calculates the voltage, the current, the power, the electric energy and the like through the two signals, when the metering chip leaves a factory, standard values are accessed to a current channel and a voltage channel, and then the error calibration is carried out on the metering chip through the main control MCU processor.
With the improvement of an intelligent power grid greatly promoted by the national power grid company, the intelligent electric energy meter and the power consumption information acquisition system already cover 99% of users, and the existing intelligent electric energy meter has certain electricity larceny prevention functions, such as uncovering detection, comparison between live line current and zero line current detection and the like, but the electricity larceny prevention modes are the basis for judging afterwards and can not be used as the basis for real-time monitoring.
Through the classification and discovery of the electricity stealing modes, the existing electricity stealing modes are classified into the following types:
1. the metering chip does not work due to the fact that the high-frequency interference is carried out on the crystal oscillator frequency point of the metering chip;
2. changing the reference of the metering chip to cause the AD sampling of the metering chip to be misaligned;
3. the voltage channel resistance voltage-dividing network is changed, so that the sampling of the voltage channel analog signal is inaccurate;
4. the sampling of the manganin of the current channel is changed, so that the sampling of the analog signal of the current channel is inaccurate;
5. the outer outlet of the electric energy meter is in short circuit, so that the sampling signal of the current channel of the electric energy meter is reduced.
The above 5 points finally show that the error of the electric energy meter is changed. In addition, the following points may cause the error of the electric energy meter to change:
1. damage to the metering chip or peripheral circuits of the metering chip;
2. communication faults between the metering chip and the MCU processor cause the MCU to be incapable of writing the calibration parameters into the metering chip, and finally the metering error is changed;
3. the power supply of the metering chip is damaged, and the metering chip cannot work.
Therefore, whether the error caused by the problems changes or not can be monitored in real time, and finally, the on-line monitoring of the metering error and the electricity stealing prevention of the intelligent electric energy meter can be realized.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a broadband carrier module who possesses anti-electricity-theft detection function aims at realizing intelligent ammeter measuring error and anti-electricity-theft on-line monitoring. The specific technical scheme is as follows:
the utility model provides a broadband carrier module that possesses electricity larceny detection function, is including setting up the first current transformer that is used for the current sampling and the first voltage sampling network that is used for the voltage sampling at intelligent ammeter inlet wire end respectively, connecting first current transformer's first micropower wireless communication module, setting are in HPLC communication module on the intelligent ammeter, it is provided with second micropower wireless communication module to increase on the HPLC communication module, first voltage sampling network is connected to through AD conversion module second micropower wireless communication module, second micropower wireless communication module connects HPLC communication module, first micropower wireless communication module, second micropower wireless communication module, HPLC communication module carry out the identity when the installation and bind.
The utility model discloses in, intelligence electric energy meter is including setting up at the inside measurement chip of intelligence electric energy meter and connecting measurement chip's MCU treater, HPLC communication module with the MCU treater of intelligence electric energy meter is connected.
Wherein, the MCU processor is connected with an internal memory.
And the MCU processor is provided with an RS485 infrared communication interface.
Preferably, a second current transformer for current sampling is arranged at the wire inlet end of the intelligent electric energy meter, and the second current transformer is connected with the metering chip of the intelligent electric energy meter.
The utility model discloses in, intelligence electric energy meter inlet wire end is provided with the second voltage sampling network that is used for the voltage sampling, second voltage sampling network connection the measurement chip of intelligence electric energy meter.
Preferably, the intelligent electric energy meter inlet wire end is provided with a manganin shunt for current sampling, and the manganin shunt is connected with the metering chip of the intelligent electric energy meter.
The utility model discloses in, the inside fault information of electric energy meter is judged through following method to broadband carrier module: and the broadband carrier module acquires the specific voltage value through the MCU processor and judges the type of internal faults of the electric energy meter according to the specific voltage value.
Preferably, the first specific voltage value is set to 10V, and the second specific voltage value is set to 20V.
Preferably, the broadband carrier module further determines whether there is an electricity stealing phenomenon by the following method:
(1) the micropower wireless module samples the current of the inlet wire end of the intelligent electric energy meter through the first current transformer, simultaneously digitalizes the current, and transmits current waveform data with time scales to the HPLC communication module;
(2) the HPLC communication module performs voltage sampling through a first voltage sampling network to obtain voltage waveform data with time scales;
(3) the HPLC communication module performs FFT calculation according to the obtained current waveform data with the time scale and the voltage waveform data with the time scale to obtain effective values of voltage, current and power;
(4) the HPLC communication module obtains voltage, current and power sampled by a metering chip of the intelligent electric energy meter through an MCU processor of the intelligent electric energy meter;
(5) the HPLC communication module obtains voltage and current through FFT calculation, compares the voltage and current obtained through sampling of a metering chip of the intelligent electric energy meter with the voltage and current obtained through sampling, obtains changing values of voltage and current channels, judges which channel is changed and what the changing value is according to the changing values of the voltage and current channels, and judges whether electricity stealing phenomena exist according to the changing values of the voltage and current channels.
More preferably, the broadband carrier module further determines the severity of electricity stealing by: and comparing the power obtained by FFT calculation with the power obtained by sampling voltage and current by a metering chip of the intelligent electric energy meter to obtain a power change value, and judging the severity of electricity stealing according to the power change value.
The utility model has the advantages that:
firstly, the utility model discloses a broadband carrier module with anti-electricity-theft detection function, through increasing resistance voltage divider network on original HPLC module, carry out the sampling calculation of voltage; the current sampling is carried out by adding a micropower wireless communication module and a current transformer CT at a current inlet end. And the HPLC module compares the voltage and the current obtained by sampling with the voltage and the current sampled by a metering chip of the intelligent electric energy meter to obtain the change values of the voltage and the current channels, and whether the electricity stealing phenomenon exists or not can be judged according to the change values of the voltage and the current channels. Therefore, the online monitoring of the metering error and the electricity larceny prevention of the intelligent electric energy meter is realized.
Second, the utility model discloses a broadband carrier module that possesses anti-electricity-stealing detection function, the HPLC module is calculated through the FFT and can also be obtained the change value of power to judge the severity of stealing electricity according to the size of the change value of power.
Drawings
Fig. 1 is a schematic structural diagram of a broadband carrier module arranged on an intelligent electric energy meter.
The lower half part in the figure is an intelligent electric energy meter, and the upper half part is a broadband carrier module.
In the figure, "CT" in the box represents the first current transformer, "CT sample" in the box represents the second current transformer, and "manganin sample" in the box represents the manganin shunt.
In the figure, the voltage sample (in a square box) connected with the AD conversion module is a first voltage sampling network, and the voltage sample (in a square box) connected with the metering chip is a second voltage sampling network.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 is the utility model discloses a broadband carrier module's that possesses anti-electricity-theft detection function embodiment, including set up the first current transformer that is used for the current sampling at intelligent ammeter inlet wire end respectively and the first voltage sampling network that is used for voltage sampling, connect first current transformer's first micropower wireless communication module, setting are in HPLC communication module on the intelligent ammeter, the last increase of HPLC communication module is provided with second micropower wireless communication module, first voltage sampling network is connected to through AD conversion module second micropower wireless communication module, second micropower wireless communication module connects HPLC communication module, first micropower wireless communication module, second micropower wireless communication module, HPLC communication module carry out the identity when the installation and bind.
In this embodiment, the intelligent electric energy meter includes a metering chip arranged inside the intelligent electric energy meter and an MCU processor connected to the metering chip, and the HPLC communication module is connected to the MCU processor of the intelligent electric energy meter.
Wherein, the MCU processor is connected with an internal memory.
And the MCU processor is provided with an RS485 infrared communication interface.
Preferably, a second current transformer for current sampling is arranged at the wire inlet end of the intelligent electric energy meter, and the second current transformer is connected with the metering chip of the intelligent electric energy meter.
In this embodiment, the intelligent electric energy meter incoming line end is provided with a second voltage sampling network for voltage sampling, and the second voltage sampling network is connected with the metering chip of the intelligent electric energy meter.
Preferably, the intelligent electric energy meter inlet wire end is provided with a manganin shunt for current sampling, and the manganin shunt is connected with the metering chip of the intelligent electric energy meter.
In this embodiment, the broadband carrier module determines the internal fault information of the electric energy meter by the following method: and the broadband carrier module acquires the specific voltage value through the MCU processor and judges the type of internal faults of the electric energy meter according to the specific voltage value.
Preferably, the first specific voltage value is set to 10V, and the second specific voltage value is set to 20V.
Preferably, the broadband carrier module further determines whether there is an electricity stealing phenomenon by the following method:
(1) the micropower wireless module samples the current of the inlet wire end of the intelligent electric energy meter through the first current transformer, simultaneously digitalizes the current, and transmits current waveform data with time scales to the HPLC communication module;
(2) the HPLC communication module performs voltage sampling through a first voltage sampling network to obtain voltage waveform data with time scales;
(3) the HPLC communication module performs FFT calculation according to the obtained current waveform data with the time scale and the voltage waveform data with the time scale to obtain effective values of voltage, current and power;
(4) the HPLC communication module obtains voltage, current and power sampled by a metering chip of the intelligent electric energy meter through an MCU processor of the intelligent electric energy meter;
(5) the HPLC communication module obtains voltage and current through FFT calculation, compares the voltage and current obtained through sampling of a metering chip of the intelligent electric energy meter with the voltage and current obtained through sampling, obtains changing values of voltage and current channels, judges which channel is changed and what the changing value is according to the changing values of the voltage and current channels, and judges whether electricity stealing phenomena exist according to the changing values of the voltage and current channels.
More preferably, the broadband carrier module further determines the severity of electricity stealing by: and comparing the power obtained by FFT calculation with the power obtained by sampling voltage and current by a metering chip of the intelligent electric energy meter to obtain a power change value, and judging the severity of electricity stealing according to the power change value.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a broadband carrier module that possesses anti-electricity-theft detection function, its characterized in that, including set up the first current transformer that is used for the current sampling and the first voltage sampling network that is used for the voltage sampling at intelligent ammeter inlet wire end respectively, connect first micropower wireless communication module of first current transformer, set up and be in HPLC communication module on the intelligent ammeter, it is provided with second micropower wireless communication module to increase on the HPLC communication module, first voltage sampling network is connected to through AD conversion module second micropower wireless communication module, second micropower wireless communication module connects HPLC communication module, first micropower wireless communication module, second micropower wireless communication module, HPLC communication module carry out the identity when the installation and bind.
2. The broadband carrier module with the anti-electricity-theft detection function according to claim 1, wherein the intelligent electric energy meter comprises a metering chip arranged inside the intelligent electric energy meter and an MCU processor connected with the metering chip, and the HPLC communication module is connected with the MCU processor of the intelligent electric energy meter.
3. The broadband carrier module with the function of preventing electricity theft according to claim 2, wherein a second current transformer for current sampling is arranged at an incoming line end of the intelligent electric energy meter, and the second current transformer is connected with a metering chip of the intelligent electric energy meter.
4. The broadband carrier module with the function of preventing electricity stealing according to claim 2, wherein a second voltage sampling network for voltage sampling is arranged at the incoming line end of the intelligent electric energy meter, and the second voltage sampling network is connected with the metering chip of the intelligent electric energy meter.
5. The broadband carrier module with the function of preventing electricity theft according to claim 2, wherein the incoming line end of the intelligent electric energy meter is provided with a manganin shunt for current sampling, and the manganin shunt is connected with a metering chip of the intelligent electric energy meter.
6. The broadband carrier module with the function of preventing the fraudulent use of electricity according to claim 2, wherein the MCU processor is connected to an internal memory.
7. The broadband carrier module with the function of preventing electricity theft according to claim 2, wherein the MCU processor is provided with an RS485 infrared communication interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120212525.7U CN215005567U (en) | 2021-01-26 | 2021-01-26 | Broadband carrier module with electricity stealing prevention detection function |
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| CN202120212525.7U CN215005567U (en) | 2021-01-26 | 2021-01-26 | Broadband carrier module with electricity stealing prevention detection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114487529A (en) * | 2022-01-17 | 2022-05-13 | 无锡市恒通电器有限公司 | Single-phase electric energy meter with instantaneous value electricity stealing and electric leakage prevention detection function and with time scale/phase angle |
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2021
- 2021-01-26 CN CN202120212525.7U patent/CN215005567U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114487529A (en) * | 2022-01-17 | 2022-05-13 | 无锡市恒通电器有限公司 | Single-phase electric energy meter with instantaneous value electricity stealing and electric leakage prevention detection function and with time scale/phase angle |
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