阅读说明：本技术 一种三相电能表系统 (A kind of three-phase electric energy meter system ) 是由 邓智坚 汪俊 于 2019-08-22 设计创作，主要内容包括：本发明属于电子电路技术领域,提供了一种三相电能表系统,该三相电能表系统包括计量模块、通讯模块、主控模块以及电源管理模块,通过计量模块对三相电源输出的电信号进行电压和电流采集,以获取多个实时测量参数；并且通过通讯模块与外部设备进行数据交互。由此实现了该三相电能表系统可智能地获取实时测量参数,并且与外部设备进行数据,丰富了智能性,提高了用户的体验感,并且该三相电能表系统设计简单易行；同时,用户还可以通过按键和LCD液晶屏查阅需要查看的数据,以及该三相电能表系统能够自动检测外部磁场的强度,防止被窃电,解决了现有的三相电能表技术存在着设计繁琐、智能性差以及某些情况下无法实现跟外部设备进行通讯的问题。(The invention belongs to electronic circuit technology fields, provide a kind of three-phase electric energy meter system, the three-phase electric energy meter system includes metering module, communication module, main control module and power management module, voltage and current acquisition is carried out to the electric signal that three phase mains exports by metering module, to obtain multiple real-time measured parameters；And data interaction is carried out by communication module and external equipment.It is thus achieved that the three-phase electric energy meter system can intelligently obtain real-time measured parameters, and data are carried out with external equipment, enriches intelligence, improve the experience sense of user, and three-phase electric energy meter system design is simple and easy；Simultaneously, user can also consult the data for needing to check by key and LCD liquid crystal display, and the three-phase electric energy meter system can automatically detect the intensity of external magnetic field, it prevents by stealing, solving the problems, such as existing three-phase electric energy meter technology, there is design cumbersome, intelligent difference and cannot achieve in some cases to be communicated with external equipment.)

1. a kind of three-phase electric energy meter system characterized by comprising

Three phase mains is connect, the electric signal for exporting to the three phase mains carries out voltage and current acquisition, to obtain multiple realities When measurement parameter metering module；

For carrying out the communication module of data interaction with external equipment；

Connect with the metering module and the communication module, for control the metering module and the communication module work Main control module；And

It is connect with the three phase mains, the metering module, the communication module and the main control module, for the three-phase Power supply output electric signal carry out signal processing after, output optimization signal respectively to the metering module, the communication module and The power management module that the main control module is powered.

2. three-phase electric energy meter system as described in claim 1, which is characterized in that further include:

It is connected to the main control module, for storing the memory module of multiple real-time measured parameters.

3. three-phase electric energy meter system as described in claim 1, which is characterized in that further include:

Be connected to the main control module, for show the three-phase electric energy meter system state and multiple real-time measured parameters Display module.

4. three-phase electric energy meter system as described in claim 1, which is characterized in that further include:

It is connected to the main control module, for carrying out the detection of magnetic field strength to predeterminable area, prevents by the magnetic field detection of stealing Module.

5. three-phase electric energy meter system as described in claim 1, which is characterized in that the multiple real-time measured parameters include Active energy, capacity of idle power, output power, output voltage, output electric current, power factor (PF) and mains frequency.

6. three-phase electric energy meter system as described in claim 1, which is characterized in that the metering module uses model The three phase metering chip of RN8302B is realized.

7. three-phase electric energy meter system as described in claim 1, which is characterized in that the communication module includes total using M-Bus Line communication, the mode of near-infrared communication and 485 communications and the external equipment carry out data interaction.

8. three-phase electric energy meter system as claimed in claim 7, which is characterized in that the communication module further includes wireless telecommunications list Any one in member, ethernet communication unit, power carrier unit and RF radio frequency unit.

9. three-phase electric energy meter system as described in claim 1, which is characterized in that the power management module includes switch electricity Source, battery and super capacitor.

10. three-phase electric energy meter system as claimed in claim 3, which is characterized in that the display module includes LCD screen.

Technical field

The invention belongs to electronic circuit technology field more particularly to a kind of three-phase electric energy meter systems.

Background technique

Three-phase multifunctional electrical energy meter be for electric system, industrial and mining enterprises, communal facility, intelligent building power monitoring need It asks and designs；Three-phase multifunctional electrical energy meter can measure all common parameters of electric power, active and reactive such as three-phase current, voltage Power, electric degree, harmonic wave etc..

However, existing three-phase electric energy meter technology there is design it is cumbersome, it is intelligent difference and in some cases can not be real The problem of now being communicated with external equipment.

Summary of the invention

In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a kind of three-phase electric energy meter systems, to solve Existing three-phase electric energy meter technology there is design it is cumbersome, it is intelligent difference and in some cases cannot achieve with external equipment into The problem of row communication.

The present invention provides a kind of three-phase electric energy meter systems, comprising:

Three phase mains is connect, the electric signal for exporting to the three phase mains carries out voltage and current acquisition, more to obtain The metering module of a real-time measured parameters；

For carrying out the communication module of data interaction with external equipment；

It is connect with the metering module and the communication module, for controlling the metering module and the communication module work The main control module of work；And

It is connect with the three phase mains, the metering module, the communication module and the main control module, for described After the electric signal of three phase mains output carries out signal processing, output optimization signal is respectively to the metering module, the communication mould The power management module that block and the main control module are powered.

A kind of three-phase electric energy meter system provided by the invention, the three-phase electric energy meter system include metering module, communication module, Main control module and power management module carry out voltage and current to the electric signal that three phase mains exports by metering module and adopt Collection, to obtain multiple real-time measured parameters；And data interaction is carried out by communication module and external equipment.It is thus achieved that should Three-phase electric energy meter system can intelligently obtain real-time measured parameters, and carry out data with external equipment, enrich intelligence, mention The high experience sense of user, and three-phase electric energy meter system design is simple and easy, solves existing three-phase electric energy meter technology There is design cumbersome, intelligent difference and cannot achieve the problem of being communicated with external equipment in some cases.

Detailed description of the invention

Fig. 1 is a kind of modular structure schematic diagram for three-phase electric energy meter system that one embodiment of the invention provides.

Fig. 2 be another embodiment of the present invention provides a kind of three-phase electric energy meter system modular structure schematic diagram.

Fig. 3 is a kind of exemplary circuit figure of three-phase electric energy meter system of corresponding diagram 2.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.

A kind of above-mentioned three-phase electric energy meter system, the three-phase electric energy meter system include metering module, communication module, master control mould Block and power management module carry out voltage and current acquisition to the electric signal that three phase mains exports by metering module, to obtain Take multiple real-time measured parameters；And data interaction is carried out by communication module and external equipment.It is thus achieved that the three-phase electricity Energy table system can intelligently obtain real-time measured parameters, and carry out data with external equipment, enrich intelligence, improve use The experience sense at family, and three-phase electric energy meter system design is simple and easy.

Fig. 1 shows a kind of modular structure of three-phase electric energy meter system of one embodiment of the invention offer, for the ease of saying Bright, only the parts related to this embodiment are shown, and details are as follows:

A kind of above-mentioned three-phase electric energy meter system, including metering module 101, communication module 104, main control module 102 and electricity Source control module 103.

Metering module 101 connects three phase mains 105, and the electric signal for exporting to three phase mains 105 carries out voltage and current Acquisition, to obtain multiple real-time measured parameters.

Communication module 104 is used to carry out data interaction with external equipment.

Main control module 102 is connect with metering module 101 and communication module 104, for controlling metering module 101 and communication mould Block 104 works.

Power management module 103 and three phase mains 105, metering module 101, communication module 104 and main control module 102 connect Connect, after electric signal for exporting to three phase mains 105 carries out signal processing, output optimization signal respectively to metering module 101, Communication module 104 and main control module 102 are powered.

As an embodiment of the present invention, the communication module 104 in above-mentioned three-phase electric energy meter system both can be with external equipment It establishes and is wirelessly connected, wired connection can also be carried out with external equipment.Specifically, external equipment include household electrical appliance (such as: electricity Depending on machine, refrigerator, air-conditioning etc.), factory's electrical equipment (such as: generator, Pipeline control terminal etc.) and office equipment (example Such as: computer, printer).

As an embodiment of the present invention, above-mentioned multiple real-time measured parameters include active energy, capacity of idle power, output work Rate, output voltage, output electric current, power factor (PF) and mains frequency.

As an embodiment of the present invention, above-mentioned power management module 103 first carries out the electric signal that three phase mains 105 exports After voltage transformation and filtration treatment, power supply signal is effectively distributed to the different components of system, including metering module 101, communication Module 104 and main control module 102.

Fig. 2 shows another embodiment of the present invention provides a kind of three-phase electric energy meter system modular structure, for the ease of Illustrate, only the parts related to this embodiment are shown, and details are as follows:

As an embodiment of the present invention, above-mentioned three-phase electric energy meter system further includes memory module 106, memory module 106 with Main control module 102 connects, for storing multiple real-time measured parameters.

As an embodiment of the present invention, above-mentioned three-phase electric energy meter system further includes display module 107, display module 107 with Main control module 102 connect, for show three-phase electric energy meter system state and multiple real-time measured parameters.

Specifically, the state of three-phase electric energy meter system includes working condition, standby mode, off-mode and abnormal shape State.

As an embodiment of the present invention, above-mentioned three-phase electric energy meter system further includes magnetic field detection module 108, magnetic field detection mould Block 108 is connect with main control module 102, for carrying out the detection of magnetic field strength to predeterminable area, is prevented by stealing.

Specifically, it is mainly reflected in using magnetic field detection module 108 as anti-electricity-theft effect:

1, neutral line current measurement is provided；

2, a kind of low-power consumption mode NVM2 is provided, compares anticipation for electric current, 2 grades of threshold value settable, and power consumption is less than 150 μ A；

3, a kind of low-power consumption mode NVM1 is provided, realizes low power consumption current effective value measurement, power consumption is less than 2mA；

4, full decompression active reporting function is provided, typical case average power consumption is only 7 μ A.

Fig. 3 is a kind of exemplary circuit of three-phase electric energy meter system of corresponding diagram 2, for ease of description, is illustrated only and this The relevant part of embodiment, details are as follows:

As an embodiment of the present invention, above-mentioned metering module 101 is real using the three phase metering chip of model RN8302B It is existing.

Due to using the three phase metering chip of model RN8302B, pass through the above-mentioned three-phase voltage built, current sample Circuit and zero curve sample circuit, in conjunction with the function of RN8302B itself, so that below the electrical parameters detection of the three-phase electric energy meter system Feature:

1, all-wave, fundamental active electric energy are provided, in 5000:1 dynamic range, nonlinearity erron < 0.1%, meet 0.5S and 0.2S grades of active electric energy meter required precisions；

2, all-wave, fundamental wave reactive power electric energy, in 5000:1 dynamic range, nonlinearity erron < 0.1% are provided；

3, all-wave, fundamental wave view are provided in electric energy；

4, active and reactive power direction is provided, idle four-quadrant is supported to judge；

5, there is shunt running startup function, starting threshold value is adjustable；

6, electric meter constant is adjustable；

7, provide it is active and reactive, view fast-pulse count；

8, all-wave, fundamental wave are provided, active and reactive and view is exported in pulse.

As an embodiment of the present invention, above-mentioned main control module 102 is realized using existing microprocessor, and microprocessor can be complete It at instruction fetch, executes instruction, and exchanges the operation such as information with extraneous memory and logical block.

As an embodiment of the present invention, above-mentioned communication module 104 includes logical using M-Bus bus communication 1041, near-infrared The mode of 1042 and 485 communication 1043 of news and the external equipment carry out data interaction.

As an embodiment of the present invention, above-mentioned communication module 104 further includes wireless communication unit 1044, ethernet communication list It is any one or more in member 1045, power carrier unit 1046 and RF radio frequency unit 1047.

As an embodiment of the present invention, above-mentioned power management module 103 includes Switching Power Supply 1031, battery 1032 and surpasses Grade capacitor 1033；Wherein, main power supply is used as by Switching Power Supply 1031, battery 1032 and super capacitor 1033 are used as auxiliary power supply.

As an embodiment of the present invention, above-mentioned memory module 106 is realized using existing memory, including EEPROM/ The memory headroom of FLASH, memory can be set according to actual needs.

As an embodiment of the present invention, above-mentioned display module 107 includes LCD (Liquid Crystal Display, liquid crystal Display) screen.

As an embodiment of the present invention, above-mentioned magnetic field detection module 108 is realized using existing magnetic field sensor, and magnetic field passes Sensor, which is utilized, is transformed into electric signal output for the amount in various magnetic fields and its variation, by determining electric signal, then can obtain The parameter and state in magnetic field.

As an embodiment of the present invention, above-mentioned three-phase electric energy meter system further includes key 109, key 109 and LCD liquid crystal display It is used cooperatively, user can manipulate three-phase electric energy meter system by key 109.

A kind of above-mentioned three-phase electric energy meter system is made of metering chip, microprocessor, real-time clock, data interface unit, Controlled equipped with liquid crystal display, relay etc..Metering chip by acquisition A B C voltage and A B C N phase electric current obtain Electrical signal data is surveyed in real time to obtain active energy, capacity of idle power, power, voltage, electric current, power factor (PF), mains frequency etc. Parameter to be measured, and requires to handle data according to corresponding rate and requirement etc., result is stored in data storage, and with When to external interface providing information and carry out data exchange.Its communication modes more clocks multiplicity, comprising: M-Bus bus communication, close red Outer communication, 485 communications；In addition also with good grounds customer demand select apolegamy can plug communication module, can be selected wireless telecommunications mould Block, ethernet communication module, power line carrier module (PLC), RF radio-frequency module are one of, very flexibly and easily.

Therefore, a kind of advantage of above-mentioned three-phase electric energy meter system is embodied in the following:

1, the data item that user needs to check can be consulted by key and liquid crystal display；

2, the intensity that can automatically detect external magnetic field can be used as one of stealing information source；

3, near-infrared communicates, and can be debugged at the scene by near-infrared, tests, read data；

4,485 bus communication can set up centralized meter-reading system, provide the interface of copy reading data and information, transmit reliable and stable；

5, M-Bus bus communication divides host and slave circuit, and user's alternative allows it as host or slave, realizes Different communication functions.

Meanwhile three-phase electric energy meter system can realize the measurement of following numerous projects, comprising:

A, all-wave and fundamental active, idle, apparent energy are provided；

B, all-wave, fundamental wave and harmonic wave three-phase voltage current virtual value are provided；

C, all-wave, phasor power factor are provided；

D, voltage line frequency, measurement error < 0.02% are provided；

E, seven tunnel zero passage detections are provided, zero passage threshold value is settable；

F, voltage phase sequence false retrieval is provided to survey；

G, decompression instruction is provided, decompression threshold value is settable；

H, voltage dip detection is provided；

I, over-voltage, over-current detection are provided.

To sum up, a kind of three-phase electric energy meter system provided in an embodiment of the present invention, the three-phase electric energy meter system include metering mould Block, communication module, main control module and power management module carry out electricity to the electric signal that three phase mains exports by metering module Pressure and current acquisition, to obtain multiple real-time measured parameters；And data interaction is carried out by communication module and external equipment.By This, which realizes the three-phase electric energy meter system, can intelligently obtain real-time measured parameters, and carry out data with external equipment, enrich Intelligence improves the experience sense of user, and three-phase electric energy meter system design is simple and easy；Meanwhile user can be with Being consulted by key and LCD liquid crystal display needs the data checked and the three-phase electric energy meter system to can automatically detect external magnetic The intensity of field prevents that it is cumbersome, intelligent poor and certain there is designing to solve existing three-phase electric energy meter technology by stealing In the case of cannot achieve the problem of being communicated with external equipment.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.