CN116008897A - Electric energy meter metering current transformer monitoring device - Google Patents
Electric energy meter metering current transformer monitoring device Download PDFInfo
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- CN116008897A CN116008897A CN202310273155.1A CN202310273155A CN116008897A CN 116008897 A CN116008897 A CN 116008897A CN 202310273155 A CN202310273155 A CN 202310273155A CN 116008897 A CN116008897 A CN 116008897A
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Abstract
The application discloses electric energy meter measurement current transformer monitoring devices relates to the electric power field, in order to realize the monitoring to current transformer, the current transformer monitoring devices that this application provided includes: the current transformer measures a magnetic core, a power supply module, a sampling module and a control module; the current transformer measuring magnetic core and the current transformer measuring magnetic core simultaneously pass through the current wire. Because the current transformer measuring magnetic core and the current transformer measuring magnetic core are arranged in the same current channel, the current transformer measuring magnetic core is the same as the electric signal sensed by the current transformer measuring magnetic core, the sampling module collects the electric signal output by the current transformer measuring magnetic core and sends the electric signal to the control module, the control module monitors whether the electric signal is abnormal or not, and the control module can further analyze the electric signal to judge whether the electric signal is stolen, the problems of abnormal temperature and the like caused by unbalanced three-phase current, reverse phase sequence, overload or short circuit are solved, and the current transformer is monitored.
Description
Technical Field
The application relates to the field of electric power, in particular to an electric energy meter metering current transformer monitoring device.
Background
Along with the continuous increase of the electricity consumption, ensuring that the power equipment can normally operate is one of important influencing factors of the whole economic operation. In order to monitor the real-time state of the power equipment, an on-line monitoring system of the power system is arranged to monitor the real-time state of the ammeter. Monitoring whether the voltage and the current are abnormal or not. The metering magnetic core of the current transformer is connected with the secondary wiring terminal, is used as an analog output part of current metering, and is used as a metering device to be matched with an ammeter to finish metering.
However, in the whole metering system, the current transformer serving as a key metering device is always in a monitoring blind area, and the current transformer is not monitored and managed in the current secondary equipment system.
Therefore, how to monitor the current transformer is a technical problem to be solved by the person skilled in the art.
Disclosure of Invention
The utility model aims at providing an electric energy meter measurement current transformer monitoring devices who monitors current transformer now.
For solving above-mentioned technical problem, this application provides an electric energy meter measurement current transformer monitoring devices, include:
the current transformer measures a magnetic core, a power supply module, a sampling module and a control module;
the current transformer measuring magnetic core and the current transformer measuring magnetic core simultaneously penetrate through a current wire, and the power supply module is connected with the sampling module and the control module to supply power to the sampling module and the control module; the sampling module is connected with the current transformer measuring magnetic core and the control module, acquires the electric signal of the current transformer measuring magnetic core and sends the electric signal to the control module, and the control module monitors the electric signal.
Preferably, in the monitoring device for the metering current transformer of the electric energy meter, the power taking circuit of the power module shares a magnetic core with the measuring magnetic core of the current transformer.
Preferably, in the monitoring device for the electric energy meter metering current transformer, the sampling circuit of the sampling module shares a magnetic core with the current transformer measuring magnetic core.
Preferably, in the above electric energy meter metering current transformer monitoring device, the power module further includes: an energy storage module; the energy storage module is used for storing electric energy.
Preferably, in the monitoring device for the metering current transformer of the electric energy meter, the control module is connected with the sampling module and the power module, and is used for controlling the working states of the sampling module and the power module to be switched, and the sampling module and the power module work independently and are not interfered with each other.
Preferably, in the above electric energy meter metering current transformer monitoring device, the sampling module further includes: and the temperature sensor is used for acquiring temperature data and sending the temperature data to the control module.
Preferably, in the monitoring device for the metering current transformer of the electric energy meter, the monitoring device further comprises: a communication module; the communication module is connected with the control module and used for sending the analysis data of the control module to the terminal.
Preferably, in the monitoring device for the metering current transformer of the electric energy meter, the communication module is a bluetooth module.
Preferably, in the monitoring device for the metering current transformer of the electric energy meter, the control module is an MCU.
Preferably, in the electric energy meter metering current transformer monitoring device, the current transformer measuring magnetic core, the power module, the sampling module, the control module and the current transformer metering magnetic core are packaged through the shell, and the secondary wiring terminal is located outside the shell and connected with the electric energy meter.
The utility model provides an electric energy meter measurement current transformer monitoring devices, include: the current transformer measures a magnetic core, a power supply module, a sampling module and a control module; the current transformer measuring magnetic core and the current transformer measuring magnetic core simultaneously penetrate through a current wire, and the power supply module is connected with the sampling module and the control module to supply power to the sampling module and the control module; the sampling module is connected with the current transformer measuring magnetic core and the control module, acquires the electric signal of the current transformer measuring magnetic core and sends the electric signal to the control module, and the control module monitors the electric signal. Because the current transformer measuring magnetic core and the current transformer measuring magnetic core are arranged in the same current channel, the current transformer measuring magnetic core is the same as the electric signal sensed by the current transformer measuring magnetic core, the sampling module collects the electric signal output by the current transformer measuring magnetic core and sends the electric signal to the control module, the control module monitors whether the electric signal is abnormal or not, and the control module can further analyze the electric signal to judge whether the electric signal is stolen, the problems of abnormal temperature and the like caused by unbalanced three-phase current, reverse phase sequence, overload or short circuit are solved, and the current transformer is monitored.
Drawings
For a clearer description of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a monitoring device for a metering current transformer of an electric energy meter according to an embodiment of the present application;
wherein, the reference numerals are as follows: the measuring device comprises a measuring magnetic core 11 of a current transformer, a power supply module 12, a sampling module 13, a control module 14, a measuring magnetic core 15 of the current transformer and a communication module 16.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein without making any inventive effort are intended to fall within the scope of the present application.
The core of the application is to provide a monitoring device for a metering current transformer of an electric energy meter.
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.
Along with the continuous increase of the electricity consumption, ensuring that the power equipment can normally operate is one of important influencing factors of the whole economic operation. In order to monitor the real-time state of the power equipment, an on-line monitoring system of the power system is arranged to monitor the real-time state of the ammeter. In general, monitoring whether there is an abnormality in the voltage is mainly performed for short-time interruption, suspension, flickering, or three-phase imbalance of the voltage. The monitoring of whether the current is abnormal or not is closely related to the current quality and the voltage quality, and in order to continuously improve the overall transmission efficiency of the electric energy, the monitoring of current unbalance, noise or current harmonic waves in the current is mainly carried out. Alarm reminding can be performed for abnormal phenomena. The function is to reduce the loss of the line and improve the quality of the power grid. The current reverse polarity is monitored, and the current reverse polarity of a current secondary side loop (the incoming line and the outgoing line are connected reversely) is mainly caused by wiring errors, so that metering errors can occur. Still including monitoring the current unbalance, because along with the time years is longer and longer, the load capacity that bears can be less, if operating time is for a long time, can lead to the circuit to generate heat and lead to the temperature higher, will appear circuit failure or conflagration etc. three-phase load unbalance is very lost to the transformer, still influences the life of equipment. The power system on-line monitoring system in the energy management system platform mainly can acquire real-time data through an intelligent module and a communication module in a monitoring and ammeter reading mode, and helps a business owner timely discover abnormal states such as power in time, so that the power and other abnormal problems can be helped while the fault processing speed is increased.
However, in the whole metering system, the current transformer serving as a key metering device is always in a monitoring blind area, and the current transformer is not monitored and managed in the current secondary equipment system. The novel electric power Internet of things system needs to monitor the running state of the current transformer in real time in order to realize the interconnection sensing and monitoring of all the equipment.
For solving the above technical problem, the present application provides a monitoring device for a metering current transformer of an electric energy meter, fig. 1 is a schematic diagram of the monitoring device for a metering current transformer of an electric energy meter, as shown in fig. 1, including:
the current transformer measures the magnetic core 11, the power module 12, the sampling module 13, the control module 14;
the current transformer measuring magnetic core 11 and the current transformer measuring magnetic core 15 simultaneously penetrate through the same current line, and the power supply module 12 is connected with the sampling module 13 and the control module 14 to supply power to the sampling module 13 and the control module 14; the sampling module 13 is connected with the current transformer measuring magnetic core 11 and the control module 14, collects the electric signal of the current transformer measuring magnetic core 11 and sends the electric signal to the control module 14, and the control module 14 monitors the electric signal.
The current transformer principle is based on the electromagnetic induction principle. The current transformer consists of a closed iron core and windings. The primary winding turns are very few and are connected in series with the circuit of the current to be measured, so that the current is always flowing through the circuit, the secondary winding turns are relatively large and are connected in series with the measuring instrument and the protection circuit, and the secondary circuit is always closed when the current transformer works, so that the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to short circuit.
The current transformer measuring magnetic core 11 and the current transformer measuring magnetic core 15 simultaneously pass through the same current wire, and the current transformer monitoring device can be installed on a three-phase alternating current circuit or a single-phase alternating current circuit and can be installed according to actual needs. The current transformer measuring magnetic core and the current transformer measuring magnetic core sense the same electric signal, if the sampling module 13 is a series resistor, the control module 14 can calculate the current value through the soft measuring algorithm by measuring the voltages at two ends of the resistor. The ammeter and the current sensor can be connected in series in the circuit to obtain the current value. The part of the current transformer measuring magnetic core 11 is fully decoupled with the hardware circuit of the part of the current transformer measuring magnetic core 15, and the part of the current transformer measuring magnetic core 11 does not influence the normal work of the part of the current transformer measuring magnetic core 15. The connection in fig. 1 is not all, for example, the current transformer measuring core 11 and the current transformer measuring core 15 are not shown to pass through the same current line at the same time due to space limitation, and the specific structure and connection are subject to the text.
The sampling module 13 in this embodiment collects the electrical signal output by the current transformer measuring magnetic core 11, and sends the electrical signal to the control module 14, and the control module 14 performs the power quality analysis, and this embodiment is not limited to the specific structure of the sampling module 13, and can be designed according to the actual needs. The sampling module 13 may be interval sampling or burst sampling, and the embodiment is not particularly limited.
The power supply module 12 supplies power to the sampling module 13 and the control module 14, and can be an energy storage power supply, an external power supply or other power supply modes, and the power supply is designed according to actual needs.
The control module 14 monitors the electric signal after receiving the electric signal sent by the sampling module 13, and judges whether the abnormality occurs, in addition, the current transformer is monitored to measure the current of the magnetic core 11, and the current transformer and the measurement data of the electric energy meter are analyzed, so that phase loss detection can be performed, three-phase imbalance and reverse phase sequence monitoring can be performed, and whether electricity stealing exists or not can be judged; according to the current data of the magnetic core 11 measured by the current transformer, harmonic analysis is performed, and the power supply quality of the power distribution network can be evaluated. Preferably, the control module 14 is a micro control unit (Microcontroller Unit, MCU). The MCU has the function of ultra-low power consumption, the power consumption of the sleep mode can be controlled at microampere level, the standby power consumption of the electronic part of the current transformer monitoring device can be reduced, and the working time of the electronic part of the current transformer monitoring device is prolonged.
The electric energy meter refers to an electric meter connected with the current transformer metering magnetic core 15, supports data communication between the uplink and the concentrator for the output terminal of the power equipment, and opens a communication link between the electric energy meter and the current transformer monitoring device.
The electric energy meter measurement current transformer monitoring devices that this embodiment provided includes: the current transformer measures the magnetic core 11, the power module 12, the sampling module 13, the control module 14; the current transformer measuring magnetic core 11 and the current transformer measuring magnetic core 15 share one magnetic core, and the power module 12 is connected with the sampling module 13 and the control module 14 to supply power to the sampling module 13 and the control module 14; the sampling module 13 is connected with the current transformer measuring magnetic core 11 and the control module 14, collects the electric signal of the current transformer measuring magnetic core 11 and sends the electric signal to the control module 14, and the control module 14 monitors the electric signal. The current transformer measuring magnetic core 11 and the current transformer measuring magnetic core 15 simultaneously pass through the same current line, the current transformer measuring magnetic core 11 is the same as the electric signal sensed by the current transformer measuring magnetic core 15, the sampling module 13 collects the electric signal output by the current transformer measuring magnetic core 11 and sends the electric signal to the control module 14, the control module 14 monitors whether the electric signal is abnormal or not, the electric signal can be further analyzed, whether the electric signal is stolen, the three-phase current is unbalanced, the reverse phase sequence, overload or short circuit causes the temperature abnormality and other problems are judged, and the current transformer is monitored.
According to the above embodiment, the preferred module of the power module 12 is provided, and the power taking circuit of the power module 12 shares one magnetic core with the current transformer measuring magnetic core 11.
The power taking circuit of the power module 12 and the current transformer measurement magnetic core 11 share one magnetic core, and the self power taking function is realized through electromagnetic induction.
Preferably, the power module 12 further comprises: an energy storage module; the energy storage module is used for storing electric energy.
Preferably, the control module 14 is connected to the sampling module 13 and the power module 12, and controls the switching of the sampling module 13 and the power module 12. As a preferred embodiment, the control module 14 controls the sampling module 13 to periodically sample and controls the power module 12 to stop taking energy, and at the working interval of the sampling module 13, the control module 14 controls the power module 12 to take electricity and store energy. In this way, the influence on the original sampling data can be avoided, and in the process that the sampling module 13 works and the power supply module 12 stops taking energy, the electric energy stored by the electric double-layer capacitor can be used for supplying power to the sampling module 13 and the control module 14.
Preferably, the present embodiment provides a solution that the sampling module 13 is a sampling circuit, and shares a core with the current transformer measurement core 11.
The sampling module 13 and the power module 12 share one magnetic core, the control module 14 can control the sampling module 13 and the power module 12, sampling can be divided into periodic sampling and burst sampling, the sampling interval electricity-taking current transformer is used for energy-taking and energy-storing, the control module 14 can control the sampling module 13, the electricity-taking function of the power module 12 is closed when the sampling module 13 works, and the influence on original sampling data is avoided.
According to the above embodiment, in order to evaluate the current operating state of the current transformer metering core 15, the sampling module 13 further comprises: a temperature sensor for acquiring temperature values and sending the temperature values to the control module 14.
The temperature value acquired by the sampling module 13 is equal to the temperature value of the current transformer metering magnetic core 15, and the temperature value is sent to the control module 14, and the control module 14 can analyze the temperature value to evaluate the current working state of the current transformer metering magnetic core 15.
Traditional current transformer measures magnetic core, only realizes the measurement function of cooperation electric energy meter, does not have intelligent electronic part, can't realize wireless communication function, consequently, this embodiment provides a preferred scheme, and above-mentioned current transformer monitoring devices still includes: a communication module 16; the communication module 16 is connected to the control module 14 for transmitting the analysis data of the control module 14 to the terminal.
Communication with the terminal is achieved through the communication module 16, and collected data, analysis data and the like can be sent to the terminal for further in-depth analysis. Preferably, the communication module 16 is a bluetooth module.
The communication address of the current transformer monitoring device can be obtained by scanning the Bluetooth address, wireless communication with the terminal is realized, the state quantity uploading functions such as current, temperature and electric energy quality analysis are realized, and the terminal can be used for deepening applications such as whether electricity is stolen, three-phase imbalance, reverse phase sequence, overload or temperature abnormality caused by short circuit and the like according to the state quantity and the measurement data of the electric energy meter.
The control module 14 has a storage function and can realize the functions of intelligent transformer management, monitoring data storage and data wireless communication.
In the practical application environment, in order to realize the modularization of device, the current transformer measurement magnetic core 11, the power module 12, the sampling module 13, the control module 14 and the current transformer measurement magnetic core 15 in the electric energy meter measurement current transformer monitoring device are packaged through the shell, and the secondary wiring terminal is located outside the shell and connected with the electric energy meter.
The current transformer measurement magnetic core 11, the power module 12, the sampling module 13, the control module 14 and the current transformer measurement magnetic core 15 are integrally packaged through the shell, the secondary wiring terminal of the current transformer measurement magnetic core 15 is located outside the shell and connected with the electric energy meter, the electric quantity measurement function is achieved, and measurement accuracy is guaranteed.
The monitoring device for the metering current transformer of the electric energy meter is described in detail. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. An electric energy meter measurement current transformer monitoring devices, characterized in that includes:
the current transformer measures the magnetic core (11), the power module (12), the sampling module (13), the control module (14);
the current transformer measuring magnetic core (11) and the current transformer measuring magnetic core (15) simultaneously pass through the same current line, and the power supply module (12) is connected with the sampling module (13) and the control module (14) to supply power for the sampling module (13) and the control module (14); the sampling module (13) is connected with the current transformer measuring magnetic core (11) and the control module (14), acquires the electric signal of the current transformer measuring magnetic core (11) and sends the electric signal to the control module (14), and the control module (14) monitors the electric signal.
2. The device according to claim 1, characterized in that the power-taking circuit of the power module (12) shares a core with the current transformer measuring core (11).
3. The device according to claim 2, characterized in that the sampling circuit of the sampling module (13) shares a core with the current transformer measuring core (11).
4. A power meter metering current transformer monitoring device as claimed in claim 3, wherein the power supply module (12) further comprises: an energy storage module; the energy storage module is used for storing electric energy.
5. The electric energy meter metering current transformer monitoring device according to claim 4, wherein the control module (14) is connected with the sampling module (13) and the power module (12) and controls the working state switching of the sampling module (13) and the power module (12), and the sampling module (13) and the power module (12) work independently and do not interfere with each other.
6. The electric energy meter metering current transformer monitoring device according to claim 1, wherein the sampling module (13) further comprises: and the temperature sensor is used for acquiring temperature data and sending the temperature data to the control module (14).
7. The electrical energy meter metering current transformer monitoring device of claim 1, further comprising: a communication module (16); the communication module (16) is connected with the control module (14) and is used for sending analysis data of the control module (14) to a terminal.
8. The electric energy meter measuring current transformer monitoring device of claim 7, wherein the communication module (16) is a bluetooth module.
9. The electric energy meter metering current transformer monitoring device of any one of claims 1 to 8, wherein the control module (14) is an MCU.
10. The electric energy meter metering current transformer monitoring device according to claim 1, wherein the current transformer measuring magnetic core (11), the power module (12), the sampling module (13), the control module (14) and the current transformer metering magnetic core (15) are packaged through a shell, and a secondary wiring terminal is located outside the shell and connected with an electric energy meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310273155.1A CN116008897A (en) | 2023-03-21 | 2023-03-21 | Electric energy meter metering current transformer monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310273155.1A CN116008897A (en) | 2023-03-21 | 2023-03-21 | Electric energy meter metering current transformer monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477495A (en) * | 2023-12-28 | 2024-01-30 | 国网山西省电力公司太原供电公司 | Current transformer state monitoring system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167127A (en) * | 2021-11-24 | 2022-03-11 | 镇江市丹高电器有限公司 | Self-powered current transformer |
| CN114814327A (en) * | 2022-05-25 | 2022-07-29 | 河北申科电力股份有限公司 | An anti-stealing current transformer circuit |
-
2023
- 2023-03-21 CN CN202310273155.1A patent/CN116008897A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167127A (en) * | 2021-11-24 | 2022-03-11 | 镇江市丹高电器有限公司 | Self-powered current transformer |
| CN114814327A (en) * | 2022-05-25 | 2022-07-29 | 河北申科电力股份有限公司 | An anti-stealing current transformer circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477495A (en) * | 2023-12-28 | 2024-01-30 | 国网山西省电力公司太原供电公司 | Current transformer state monitoring system and method |
| CN117477495B (en) * | 2023-12-28 | 2024-03-12 | 国网山西省电力公司太原供电公司 | Current transformer state monitoring system and method |
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