CN210775648U - Three-phase electric energy meter system - Google Patents
Three-phase electric energy meter system Download PDFInfo
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- CN210775648U CN210775648U CN201921396229.6U CN201921396229U CN210775648U CN 210775648 U CN210775648 U CN 210775648U CN 201921396229 U CN201921396229 U CN 201921396229U CN 210775648 U CN210775648 U CN 210775648U
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Abstract
The utility model belongs to the technical field of electronic circuit, a three-phase electric energy meter system is provided, which comprises a metering module, a communication module, a main control module and a power management module, wherein the metering module is used for collecting voltage and current of electric signals output by a three-phase power supply so as to obtain a plurality of real-time measurement parameters; and data interaction is carried out with external equipment through the communication module. Therefore, the three-phase electric energy meter system can intelligently acquire real-time measurement parameters and carry out data with external equipment, the intelligence is enriched, the experience of a user is improved, and the three-phase electric energy meter system is simple and easy to design; simultaneously, the user can also look up the data that need look over through button and LCD screen to and this three-phase electric energy meter system can automated inspection external magnetic field's intensity, prevents to be stolen the electricity, has solved current three-phase electric energy meter technique and has had the problem that the design is loaded down with trivial details, intelligent poor and can't realize carrying out the communication with external equipment under certain circumstances.
Description
Technical Field
The utility model belongs to the technical field of electronic circuit, especially, relate to a three-phase electric energy meter system.
Background
The three-phase multifunctional electric energy meter is designed aiming at the power monitoring requirements of power systems, industrial and mining enterprises, public facilities and intelligent buildings; the three-phase multifunctional electric energy meter can measure all common electric parameters, such as three-phase current, voltage, active power, reactive power, electric power, harmonic wave and the like.
However, the existing three-phase electric energy meter technology has the problems of complex design, poor intelligence and incapability of communicating with external equipment under certain conditions.
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned prior art, the utility model aims to provide a three-phase electric energy meter system to there is the problem that the design is loaded down with trivial details, intelligent poor and can't realize carrying out the communication with external equipment under certain circumstances in solving current three-phase electric energy meter technique.
The utility model provides a three-phase electric energy meter system, include:
the metering module is connected with a three-phase power supply and is used for collecting voltage and current of the electric signals output by the three-phase power supply so as to obtain a plurality of real-time measurement parameters;
the communication module is used for carrying out data interaction with external equipment;
the main control module is connected with the metering module and the communication module and is used for controlling the metering module and the communication module to work; and
and the power management module is connected with the three-phase power supply, the metering module, the communication module and the main control module and used for outputting optimized signals to respectively supply power to the metering module, the communication module and the main control module after the electric signals output by the three-phase power supply are subjected to signal processing.
The utility model provides a three-phase electric energy meter system, this three-phase electric energy meter system includes metering module, communication module, host system and power management module, carries out voltage and current acquisition to the electric signal of three-phase power output through metering module to obtain a plurality of real-time measurement parameters; and data interaction is carried out with external equipment through the communication module. Therefore, the three-phase electric energy meter system can intelligently acquire real-time measurement parameters and carry out data with external equipment, intelligence is enriched, user experience is improved, the three-phase electric energy meter system is simple and easy to design, and the problems that the existing three-phase electric energy meter technology is complex in design, poor in intelligence and incapable of communicating with the external equipment under certain conditions are solved.
Drawings
Fig. 1 is a schematic diagram of a module structure of a three-phase electric energy meter system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a module structure of a three-phase electric energy meter system according to another embodiment of the present invention.
Fig. 3 is an exemplary circuit diagram of a three-phase electric energy meter system corresponding to fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The three-phase electric energy meter system comprises a metering module, a communication module, a main control module and a power supply management module, wherein the metering module is used for acquiring voltage and current of an electric signal output by a three-phase power supply so as to obtain a plurality of real-time measurement parameters; and data interaction is carried out with external equipment through the communication module. Therefore, the three-phase electric energy meter system can intelligently acquire real-time measurement parameters and carry out data with external equipment, intelligence is enriched, user experience is improved, and the three-phase electric energy meter system is simple and easy to design.
Fig. 1 shows a module structure of a three-phase electric energy meter system according to an embodiment of the present invention, and for convenience of description, only the parts related to this embodiment are shown, and detailed descriptions are as follows:
the three-phase electric energy meter system comprises a metering module 101, a communication module 104, a main control module 102 and a power management module 103.
The metering module 101 is connected to the three-phase power supply 105, and is configured to collect voltage and current of an electrical signal output by the three-phase power supply 105 to obtain a plurality of real-time measurement parameters.
The communication module 104 is used for data interaction with an external device.
The main control module 102 is connected to the metering module 101 and the communication module 104, and is configured to control the metering module 101 and the communication module 104 to operate.
The power management module 103 is connected to the three-phase power supply 105, the metering module 101, the communication module 104 and the main control module 102, and is configured to output an optimization signal to respectively supply power to the metering module 101, the communication module 104 and the main control module 102 after performing signal processing on an electrical signal output by the three-phase power supply 105.
As an embodiment of the present invention, the communication module 104 in the three-phase electric energy meter system can be connected to an external device wirelessly or wired. Specifically, the external devices include household appliances (e.g., televisions, refrigerators, air conditioners, etc.), industrial appliances (e.g., generators, line control terminals, etc.), and office appliances (e.g., computers, printers, etc.).
As an embodiment of the utility model, above-mentioned a plurality of real-time measurement parameters include active electric quantity, reactive power quantity, output voltage, output current, power factor and grid frequency.
As an embodiment of the present invention, the power management module 103 performs voltage transformation and filtering processing on the electrical signal outputted from the three-phase power supply 105, and then effectively distributes the power signal to different components of the system, including the metering module 101, the communication module 104 and the main control module 102.
Fig. 2 shows a module structure of a three-phase electric energy meter system according to another embodiment of the present invention, and for convenience of description, only the parts related to this embodiment are shown, which are detailed as follows:
as an embodiment of the present invention, the three-phase electric energy meter system further includes a storage module 106, the storage module 106 is connected to the main control module 102 for storing a plurality of real-time measurement parameters.
As an embodiment of the utility model, above-mentioned three-phase electric energy meter system still includes display module 107, and display module 107 is connected with host system 102 for show three-phase electric energy meter system's state and a plurality of real-time measurement parameter.
Specifically, the states of the three-phase electric energy meter system comprise an operating state, a standby state, a shutdown state and an abnormal state.
As an embodiment of the utility model, above-mentioned three-phase electric energy meter system still includes magnetic field detection module 108, and magnetic field detection module 108 is connected with host system 102 for to predetermineeing the region and carry out the detection of magnetic field intensity, prevent to be stolen the electricity.
Specifically, the function of preventing electricity theft by using the magnetic field detection module 108 is mainly embodied as follows:
1. providing a zero line current measurement;
2. providing a low power consumption mode NVM2 for current comparison and prediction, wherein the threshold 2 can be set, and the power consumption is less than 150 μ A;
3. providing a low power consumption mode NVM1, realizing low power consumption current effective value measurement, wherein the power consumption is less than 2 mA;
4. and a full-voltage-loss active reporting function is provided, and the average power consumption of typical application is only 7 muA.
Fig. 3 is an exemplary circuit of a three-phase electric energy meter system corresponding to fig. 2, and for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
as an embodiment of the present invention, the above-mentioned metering module 101 is implemented by a three-phase metering chip with the model number of RN 8302B.
Due to the fact that the three-phase metering chip with the model number of RN8302B is adopted, the three-phase voltage and current sampling circuit and the zero line sampling circuit which are built are combined with the functions of RN8302B, and the three-phase electric energy meter system has the following characteristics of electric parameter detection:
1. full-wave and fundamental wave active electric energy is provided, the nonlinear error is less than 0.1 percent within the dynamic range of 5000:1, and the precision requirements of 0.5S and 0.2S level active electric energy meters are met;
2. providing full-wave and fundamental wave reactive power, wherein the nonlinear error is less than 0.1% in a dynamic range of 5000: 1;
3. providing full-wave, fundamental apparent electrical energy;
4. providing active power and reactive power directions and supporting reactive four-quadrant judgment;
5. the device has a shunt start function, and the start threshold value is adjustable;
6. the constant of the electric meter is adjustable;
7. providing active, reactive, apparent fast pulse counting;
8. providing full wave, fundamental, active, reactive and apparent pulse outputs.
As an embodiment of the present invention, the main control module 102 is implemented by a conventional microprocessor, and the microprocessor can complete the operations of fetching instructions, executing instructions, and exchanging information with an external memory and a logic component.
As an embodiment of the present invention, the communication module 104 includes a mode of adopting M-Bus communication 1041, near infrared communication 1042 and 485 communication 1043 and an external device performs data interaction.
As an embodiment of the present invention, the communication module 104 further includes one or more of a wireless communication unit 1044, an ethernet communication unit 1045, a power line carrier unit 1046, and an RF radio frequency unit 1047.
As an embodiment of the present invention, the power management module 103 includes a switching power supply 1031, a battery 1032 and a super capacitor 1033; the switching power supply 1031 is used as a main power supply, and the battery 1032 and the super capacitor 1033 are used as auxiliary power supplies.
As an embodiment of the present invention, the storage module 106 is implemented by using an existing memory, including an EEPROM/FLASH memory, and the memory space of the memory can be set according to actual needs.
As an embodiment of the present invention, the Display module 107 includes an LCD (Liquid Crystal Display).
As an embodiment of the present invention, the magnetic field detection module 108 is implemented by using an existing magnetic field sensor, and the magnetic field sensor converts various magnetic fields and the amount of change thereof into an electrical signal output, and determines the electrical signal to obtain the parameters and the state of the magnetic field.
As an embodiment of the utility model, above-mentioned three-phase electric energy meter system still includes button 109, and button 109 uses with the LCD liquid crystal screen cooperation, and user's accessible button 109 is controlled three-phase electric energy meter system.
The three-phase electric energy meter system consists of a metering chip, a microprocessor, a real-time clock and data interface equipment, and is provided with a liquid crystal display screen, a relay control and the like. The metering chip acquires electric signal data by acquiring A \ B \ C voltage and A \ B \ C \ N phase current, so that real-time measurement parameters such as active electric quantity, reactive electric quantity, power, voltage, current, power factors, power grid frequency and the like are acquired, the data are processed according to requirements such as corresponding rates, demand and the like, and the result is stored in the data storage device and is used for providing information to an external interface and exchanging data at any time. Its communication mode is various, includes: M-Bus communication, near infrared communication and 485 communication; in addition, the pluggable communication module is selected according to the customer requirements, one of a wireless communication module, an Ethernet communication module, a power line carrier module (PLC) and an RF module can be selected, and the pluggable communication module is very flexible and convenient.
Therefore, the advantages of the three-phase electric energy meter system are shown in the following points:
1. the data items which the user needs to check can be looked up through the keys and the liquid crystal display screen;
2. the intensity of an external magnetic field can be automatically detected, and the detection device can be used as one of power stealing information sources;
3. near infrared communication, which can carry out debugging, testing and data reading through near infrared on site;
4. 485 bus communication can construct a centralized reading system, provide an interface for reading data and information, and have stable and reliable transmission;
5. the M-Bus communication is divided into a host circuit and a slave circuit, and a user can selectively use the M-Bus communication as a host or a slave to realize different communication functions.
Meanwhile, the three-phase electric energy meter system can realize the measurement of the following items:
A. providing full wave and fundamental active, reactive, apparent power;
B. providing full wave, fundamental wave and harmonic three-phase voltage and current effective values;
C. providing a full wave, fundamental power factor;
D. providing voltage line frequency with measurement error < 0.02%;
E. seven paths of zero-crossing detection are provided, and a zero-crossing threshold value can be set;
F. providing voltage phase sequence error detection;
G. providing a loss of voltage indication, wherein a loss of voltage threshold value can be set;
H. providing voltage sag detection;
I. and provides overvoltage and overcurrent detection.
To sum up, the embodiment of the present invention provides a three-phase electric energy meter system, which includes a metering module, a communication module, a main control module and a power management module, wherein the metering module collects voltage and current of an electric signal output by a three-phase power supply to obtain a plurality of real-time measurement parameters; and data interaction is carried out with external equipment through the communication module. Therefore, the three-phase electric energy meter system can intelligently acquire real-time measurement parameters and carry out data with external equipment, the intelligence is enriched, the experience of a user is improved, and the three-phase electric energy meter system is simple and easy to design; simultaneously, the user can also look up the data that need look over through button and LCD screen to and this three-phase electric energy meter system can automated inspection external magnetic field's intensity, prevents to be stolen the electricity, has solved current three-phase electric energy meter technique and has had the problem that the design is loaded down with trivial details, intelligent poor and can't realize carrying out the communication with external equipment under certain circumstances.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A three-phase electric energy meter system, comprising:
the metering module is connected with a three-phase power supply and is used for collecting voltage and current of the electric signals output by the three-phase power supply so as to obtain a plurality of real-time measurement parameters;
the communication module is used for carrying out data interaction with external equipment;
the main control module is connected with the metering module and the communication module and is used for controlling the metering module and the communication module to work; and
and the power management module is connected with the three-phase power supply, the metering module, the communication module and the main control module and used for outputting optimized signals to respectively supply power to the metering module, the communication module and the main control module after the electric signals output by the three-phase power supply are subjected to signal processing.
2. The three-phase electric energy meter system of claim 1, further comprising:
and the storage module is connected with the main control module and is used for storing a plurality of real-time measurement parameters.
3. The three-phase electric energy meter system of claim 1, further comprising:
and the display module is connected with the main control module and used for displaying the state of the three-phase electric energy meter system and the plurality of real-time measurement parameters.
4. The three-phase electric energy meter system of claim 1, further comprising:
and the magnetic field detection module is connected with the main control module and used for detecting the magnetic field intensity of a preset area and preventing electricity from being stolen.
5. The three-phase electric energy meter system of claim 1, wherein the plurality of real-time measured parameters includes active power, reactive power, output voltage, output current, power factor, and grid frequency.
6. The three-phase electric energy meter system as claimed in claim 1, wherein the metering module is implemented by a three-phase metering chip with model number RN 8302B.
7. The three-phase electric energy meter system as claimed in claim 1, wherein the communication module performs data interaction with the external device by means of M-Bus communication, near infrared communication and 485 communication.
8. The three-phase electric energy meter system of claim 7, wherein the communication module further comprises any one of a wireless communication unit, an ethernet communication unit, a power carrier unit, and an RF radio unit.
9. The three-phase electric energy meter system of claim 1, wherein the power management module comprises a switching power supply, a battery, and a super capacitor.
10. The three-phase electric energy meter system of claim 3, wherein the display module comprises an LCD screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921396229.6U CN210775648U (en) | 2019-08-22 | 2019-08-22 | Three-phase electric energy meter system |
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| CN201921396229.6U CN210775648U (en) | 2019-08-22 | 2019-08-22 | Three-phase electric energy meter system |
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| CN210775648U true CN210775648U (en) | 2020-06-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501569A (en) * | 2019-08-22 | 2019-11-26 | 深圳龙电电气股份有限公司 | A kind of three-phase electric energy meter system |
| CN112782470A (en) * | 2020-12-14 | 2021-05-11 | 浙江恒业电子有限公司 | Method and system for improving metering precision of three-phase cost control intelligent electric meter based on MCU |
| CN113038300A (en) * | 2021-02-05 | 2021-06-25 | 宁波三星医疗电气股份有限公司 | Communication method for modular electric energy meter and modular electric energy meter applying same |
-
2019
- 2019-08-22 CN CN201921396229.6U patent/CN210775648U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501569A (en) * | 2019-08-22 | 2019-11-26 | 深圳龙电电气股份有限公司 | A kind of three-phase electric energy meter system |
| CN112782470A (en) * | 2020-12-14 | 2021-05-11 | 浙江恒业电子有限公司 | Method and system for improving metering precision of three-phase cost control intelligent electric meter based on MCU |
| CN113038300A (en) * | 2021-02-05 | 2021-06-25 | 宁波三星医疗电气股份有限公司 | Communication method for modular electric energy meter and modular electric energy meter applying same |
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Address after: 518000 Guangdong city of Shenzhen province Nanshan District Nanyou 107 first industrial zone 3 Patentee after: Shenzhen Longdian Huaxin Holding Group Co., Ltd Address before: 518000 Guangdong city of Shenzhen province Nanshan District Nanyou 107 first industrial zone 3 Patentee before: SHENZHEN LONDIAN ELECTRICS Co.,Ltd. |
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