CN114200201A - Miniaturized electric energy metering device based on HPLC communication technology - Google Patents
Miniaturized electric energy metering device based on HPLC communication technology Download PDFInfo
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- CN114200201A CN114200201A CN202111448361.9A CN202111448361A CN114200201A CN 114200201 A CN114200201 A CN 114200201A CN 202111448361 A CN202111448361 A CN 202111448361A CN 114200201 A CN114200201 A CN 114200201A
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- 238000004891 communication Methods 0.000 title claims abstract description 70
- 238000004128 high performance liquid chromatography Methods 0.000 title claims abstract description 29
- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 238000012423 maintenance Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/063—Details of electronic electricity meters related to remote communication
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Abstract
The invention discloses a miniaturized electric energy metering device based on an HPLC communication technology, which belongs to the field of electric energy metering and comprises an electric energy acquisition terminal, wherein the electric energy acquisition terminal comprises a micro control unit, a three-phase electric energy parameter measuring circuit, an output device and an STA (station) internet of things communication module; the three-phase electric energy parameter measuring circuit is used for receiving signals of the three-phase current transformer/single-phase current transformer, measuring voltage information and sending the voltage information to the micro control unit; the micro control unit obtains an output signal and topology network identification information according to the received voltage information; the output equipment is used for sending the output signal and the topological network identification information; the micro-control unit is connected with an external gateway/repeater through the STA Internet of things communication module; the STA internet of things communication module comprises a CT241H carrier chip, an active front end and a Hash data memory. The invention can be compatible with various communication modes, and simultaneously realizes the miniaturization of the volume and the convenience of installation.
Description
Technical Field
The invention belongs to the field of electric energy metering, and particularly relates to a miniaturized electric energy metering device based on an HPLC communication technology.
Background
HPLC is a high-speed power line carrier, also known as a broadband power line carrier, and is a broadband power line carrier technology for data transmission over low-voltage power lines. The broadband power line carrier communication network is a communication network which takes a power line as a communication medium and realizes the aggregation, transmission and interaction of the power utilization information of low-voltage power users. The broadband power line carrier mainly adopts an Orthogonal Frequency Division Multiplexing (OFDM) technology, and the frequency band uses 2MHz-12 MHz. Compared with the traditional low-speed narrowband power line carrier technology, the HPLC technology has large bandwidth and high transmission rate, and can meet the higher requirement of low-voltage power line carrier communication.
The power line broadband carrier communication module (HPLC module for short) is applied to products such as a concentrator, a collector, an electric energy meter and the like, and functions such as data transmission, data reading, channel management, power failure event reporting, network topology identification and the like are realized on a medium of a power line in a carrier communication mode.
Currently, three-phase electric energy metering devices on the market can be roughly classified into two major products:
1. the three-phase metering ammeter with the HPLC communication function has the advantages that the metering device is large in size, high in cost and high in construction and installation difficulty, and is not suitable for being applied to load points with narrow space on a production line and performing point-to-point fine management on electric equipment;
2. the three-phase guide rail type metering ammeter without the HPLC module has the advantages that the metering device is small in size and low in cost, but can only support RS485 communication generally, and the defects of short communication distance and time and labor consumption in field construction wiring exist.
Therefore, no product which is compatible with multiple communication modes, complete in function, small in size and convenient to install is available on the market at present.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a small-sized electric energy metering device based on an HPLC communication technology, which can be compatible with various communication modes and simultaneously realizes the purposes of small size and convenient installation.
In order to achieve the aim, the invention provides a miniaturized electric energy metering device based on an HPLC communication technology, which is applied to a metering ammeter and comprises an electric energy acquisition terminal, wherein the electric energy acquisition terminal is respectively connected with a three-phase current transformer/a single-phase current transformer and an external gateway/a repeater; the electric energy acquisition terminal comprises a micro control unit, a three-phase electric energy parameter measuring circuit, output equipment and an STA Internet of things communication module; the three-phase electric energy parameter measuring circuit is used for receiving signals of the three-phase current transformer/single-phase current transformer, measuring voltage information and sending the voltage information to the micro control unit; the micro control unit obtains an output signal and topology network identification information according to the received voltage information; the output equipment is used for sending an output signal and topology network identification information; the micro control unit is connected with the external gateway/repeater through the STA Internet of things communication module; the STA Internet of things communication module comprises a CT241H carrier chip, an active front end and a Hash data memory.
In an embodiment of the present invention, the output device can be connected to a handheld operation and maintenance terminal, and is configured to send an output signal of the micro control unit to the handheld operation and maintenance terminal and receive a control instruction sent by the handheld operation and maintenance terminal.
In an embodiment of the present invention, the output signal of the micro control unit includes a processing result of the micro control unit and topology network identification information.
In an embodiment of the present invention, the micro control unit can be further connected to the external gateway/repeater through an RS485 serial port.
In an embodiment of the present invention, the SCT241H carrier chip transmits an analog or digital signal at a high speed by an HPLC communication method using a power line; the active front end is connected with a power line and outputs direct-current voltage; the Hash data memory is used for storing the data of the STA Internet of things communication module.
In an embodiment of the present invention, the STA internet of things communication module further includes a TTL serial port and an LED lamp.
In an embodiment of the present invention, the electric energy collection terminal further includes a memory, a real-time clock, an alarm, and an LED indicator.
In an embodiment of the present invention, the output device further includes a micro-power wireless communication module, which is used to connect to the handheld operation and maintenance terminal in a micro-power wireless communication manner.
In an embodiment of the present invention, the output device further includes a bluetooth communication module, which is used to connect to the handheld operation and maintenance terminal in a bluetooth manner.
Compared with the prior art, the miniaturized electric energy metering device based on the HPLC communication technology has the following advantages:
1. the length, width and height of the product are 160mm, 65mm and 70mm, the size is small and exquisite, the volume of the product is about one third of that of a common three-phase electric meter on the market, and the size of the product is equivalent to that of a guide rail type three-phase electric meter.
2. And communication modes such as HPLC, RS485, infrared, Bluetooth, micropower and the like are supported, and construction and installation under various different application scenes are supported.
3. By applying the topology identification function, each node in the network can be monitored.
Drawings
Fig. 1 is a schematic diagram of a miniaturized electrical energy metering device based on HPLC communication technology according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an STA internet of things communication module of a miniaturized electric energy metering device based on an HPLC communication technology according to an embodiment of the present invention;
description of the main reference numerals:
the system comprises a 1-electric energy acquisition terminal, a 101-micro control unit, a 102-three-phase electric energy parameter measuring circuit, a 103-output device, a 104-STA Internet of things communication module, a 105-memory, a 106-real-time clock, a 107-alarm, a 108-LED indicator lamp, a 1041-SCT241H carrier chip, an 1042-active front end, a 1043-Hash data memory, a 1044-TTL serial port, a 1045-LED lamp, a 2-three-phase current transformer/single-phase current transformer, a 3-gateway/repeater and a 4-handheld operation and maintenance terminal.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1, a miniaturized power metering device based on HPLC communication technology according to a preferred embodiment of the present invention includes a power collecting terminal 1 capable of being connected to a three-phase/single-phase current transformer 2, receiving a three-phase/single-phase current signal, and being connected to an external gateway/repeater 3 for transmitting a processed signal to the gateway/repeater 3
Specifically, the power collection terminal 1 includes a Micro Control Unit (MCU)101, a three-phase power parameter measurement circuit 102, an output device 103, and an STA internet of things communication module 104.
The three-phase electric energy parameter measuring circuit 102 is configured to receive a signal of the three-phase current transformer/single-phase current transformer 2, measure voltage information, and then transmit the voltage information to the Micro Control Unit (MCU) 101.
The Micro Control Unit (MCU)101 can perform an operation according to the received voltage information to obtain an output signal to complete topology identification. The topology identification can obtain the identification information of the topology network, complete topology network change is formed by combining the topology information of the network with the standard protocol function and the multi-network information according to the newly added topology change information and the discovery list, and the information and the change condition of each node of the network are tracked. The processing result of the micro control unit 101 includes electric energy metering information. The three-phase current transformer/single-phase current transformer 2 can obtain current information, and can obtain electric energy metering information based on the measured voltage information.
The output device 103 can be connected to the handheld operation and maintenance terminal 4, and is configured to send an output signal of the micro control unit 101 to the handheld operation and maintenance terminal 4, and receive a control instruction sent by the handheld operation and maintenance terminal 4. The output signal of the micro control unit 101 includes electric energy metering information and topology network identification information. The control instruction of the handheld operation and maintenance terminal 4 is a control instruction sent by an operator to the whole electric energy collection terminal 1.
The handheld operation and maintenance terminal 4 may be a dedicated handheld mobile device, and may also be an APP application on a mobile phone.
In addition, the output device 103 may further include a micro-power wireless communication module, which is used to connect with the handheld operation and maintenance terminal 4 in a micro-power wireless communication manner, and has the characteristics of long distance, low power consumption, multiple nodes, and low cost. The output device 103 may further include a bluetooth communication module, which is used to connect to the handheld operation and maintenance terminal 4 by means of bluetooth, and has the characteristics of low power, low price, and low delay.
The Micro Control Unit (MCU)101 can be connected to the external gateway/repeater 3 through the STA internet of things communication module 104, and is configured to send an output signal of the micro control unit 101 and receive any external request operation. The STA Internet of things communication module 104 supports baud rate self-adaptation, and reduces the volume of the product to the maximum extent on the premise of keeping the HPLC carrier communication function. The external gateway/repeater 3 can receive the output signal and receive the working state of the metering meter transmitted by the external central controller.
In addition, the Micro Control Unit (MCU)101 can also be connected to the external gateway/repeater 3 via an RS485 serial port.
The STA internet of things communication module 104 has the following specifications:
working frequency band: 0.7-12 MHz (supporting frequency division);
modulation mode: OFDM;
working voltage: DC 12V +/-1V DC 5V +/-1V;
power consumption: the static power is less than or equal to 0.6W and the dynamic power is less than or equal to 1.5W;
working temperature: -40-70 ℃ (grade C3);
storage and working humidity: less than or equal to 95 percent (no condensation)
In the present invention, a structure diagram of the STA internet of things communication module 104 is shown in fig. 2, and includes a SCT241H carrier chip 1041, an active front end 1042, and a Hash data storage 1043. The SCT241H carrier chip 1041 transmits analog or digital signals at high speed by an HPLC communication method using a power line. The active front end 1042 is connected to a power line, draws sine wave ac from a power grid, rectifies the ac and outputs dc voltage to power the STA internet of things communication module 104. The Hash data storage 1043 is used for storing data of the STA internet of things communication module 104.
The STA internet of things communication module 104 further includes a TTL serial port 1044 and an LED lamp 1045. TTL serial port 1044 is used for connecting with external equipment, and LED lamp 1045 is used for displaying the operating condition of STA internet of things communication module 104.
The power collection terminal 1 further includes a memory 105, a real-time clock 106, an alarm 107, and an LED indicator 108. The memory 105 is used for storing information processed and received by the electric energy collection terminal 1, so that the subsequent searching by an operator is facilitated. The real time clock 106 can provide time synchronization. The alarm 107 includes an audible and visual module, and is capable of providing audible and visual alarms when an abnormal condition occurs in the power collection terminal 1. The LED indicator 108 can display the working state of the power collecting terminal 1, which is convenient for the operator to observe and operate.
When the invention is operated, the three-phase electric energy parameter measuring circuit 102 measures voltage information according to the signal of the three-phase current transformer/single-phase current transformer 2 and sends the voltage information to the Micro Control Unit (MCU) 101; the Micro Control Unit (MCU)101 obtains electric energy metering information and topology network identification information according to the received voltage information; then, the data is sent to the handheld operation and maintenance terminal 4 through the output device 103 for viewing by the co-operator, and is sent to the external gateway/repeater 3 through the STA Internet of things communication module 104
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (9)
1. A miniaturized electric energy metering device based on an HPLC communication technology is characterized by comprising an electric energy acquisition terminal, wherein the electric energy acquisition terminal is respectively connected with a three-phase current transformer/a single-phase current transformer and an external gateway/a repeater; the electric energy acquisition terminal comprises a micro control unit, a three-phase electric energy parameter measuring circuit, output equipment and an STA Internet of things communication module; the three-phase electric energy parameter measuring circuit is used for receiving signals of the three-phase current transformer/single-phase current transformer, measuring voltage information and sending the voltage information to the micro control unit; the micro control unit obtains an output signal and topology network identification information according to the received voltage information; the output equipment is used for sending an output signal and topology network identification information; the micro control unit is connected with the external gateway/repeater through the STA Internet of things communication module; the STA Internet of things communication module comprises a CT241H carrier chip, an active front end and a Hash data memory.
2. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the output device is capable of being connected to a handheld operation and maintenance terminal, and is configured to send an output signal of the micro control unit to the handheld operation and maintenance terminal and receive a control command sent by the handheld operation and maintenance terminal.
3. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the output signal of the micro control unit includes a processing result of the micro control unit and topology network identification information.
4. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the micro control unit is further capable of being connected with the external gateway/repeater through an RS485 serial port.
5. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the SCT241H carrier chip uses a power line to transmit analog or digital signals at high speed by the HPLC communication mode; the active front end is connected with a power line and outputs direct-current voltage; the Hash data memory is used for storing the data of the STA Internet of things communication module.
6. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the STA Internet of things communication module further comprises a TTL serial port and an LED lamp.
7. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the electric energy collecting terminal further comprises a memory, a real-time clock, an alarm and an LED indicator light.
8. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the output device further comprises a micro-power wireless communication module for connecting to the handheld operation and maintenance terminal through micro-power wireless communication.
9. The miniaturized electric energy metering device based on the HPLC communication technology of claim 1, wherein the output device further comprises a bluetooth communication module for connecting with the handheld operation and maintenance terminal by means of bluetooth.
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