CN114200201B - A miniaturized electric energy metering device based on HPLC communication technology - Google Patents
A miniaturized electric energy metering device based on HPLC communication technology Download PDFInfo
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- CN114200201B CN114200201B CN202111448361.9A CN202111448361A CN114200201B CN 114200201 B CN114200201 B CN 114200201B CN 202111448361 A CN202111448361 A CN 202111448361A CN 114200201 B CN114200201 B CN 114200201B
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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
本发明公开了一种基于HPLC通信技术的小型化电能计量装置，属于电能计量的领域，包括电能采集终端，电能采集终端包括微控制单元、三相电能参数测量电路、输出设备和STA物联通信模组；三相电能参数测量电路用于接收三相电流互感器/单相电流互感器的信号，测量电压信息并将电压信息发送到微控制单元；微控制单元根据接收到的电压信息得到输出信号和拓扑网络识别信息；输出设备用于发送输出信号和拓扑网络识别信息；微控制单元通过STA物联通信模组与外部网关/中继器相连接；STA物联通信模组包括CT241H载波芯片、主动前端和Hash数据存储器。本发明能够兼容多种通信方式，同时实现体积小型化、安装便捷化。
The present invention discloses a miniaturized electric energy metering device based on HPLC communication technology, which belongs to the field of electric energy metering, and includes an electric energy acquisition terminal, which includes a microcontroller unit, a three-phase electric energy parameter measurement circuit, an output device, and a STA Internet of Things communication module; the three-phase electric energy parameter measurement circuit is used to receive a signal from a three-phase current transformer/single-phase current transformer, measure voltage information, and send the voltage information to the microcontroller unit; the microcontroller unit obtains an output signal and topological network identification information according to the received voltage information; the output device is used to send an output signal and topological network identification information; the microcontroller unit is connected to an external gateway/repeater through the STA Internet of Things communication module; the STA Internet of Things communication module includes a CT241H carrier chip, an active front end, and a Hash data storage device. The present invention can be compatible with multiple communication modes, and at the same time, realize miniaturization and convenient 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, which is a broadband power line carrier technology that performs data transmission on a voltage power line. The broadband power line carrier communication network uses a power line as a communication medium to realize convergence, transmission and interaction of power consumption information of a low-voltage power user. The broadband power line carrier mainly adopts an Orthogonal Frequency Division Multiplexing (OFDM) technology, and the frequency band is 2MHz-12MHz. Compared with the traditional low-speed narrow-band power line carrier technology, the HPLC technology has large bandwidth and high transmission rate, and can meet the higher requirements of the low-speed narrow-band power line carrier communication.
The power line broadband carrier communication module (HPLC module for short) is applied to products such as concentrators, collectors, electric energy meters 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 media of a power line in a carrier communication mode.
Currently, three-phase electric energy metering devices on the market can be broadly classified into two main types of products:
1. The three-phase metering ammeter with the HPLC communication function has the advantages of large volume, high cost and high construction and installation difficulty, and is not suitable for being applied to load points with narrow space on a production line and carrying out point-to-point fine management on electric equipment;
2. The three-phase guide rail type metering ammeter without the HPLC module has the advantages of small volume and low cost, but can only support RS485 communication generally, and has the defects of short communication distance, time consumption and labor consumption in site construction wiring.
Therefore, at present, no product which can be compatible with various communication modes at the same time, has complete functions and realizes miniaturization and convenient installation at the same time exists on the market.
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 of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a miniaturized electric energy metering device based on an HPLC communication technology, which can be compatible with various communication modes, and simultaneously realize miniaturization and convenience in installation.
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/single-phase current transformer and an external gateway/repeater, the electric energy acquisition terminal comprises a micro control unit, a three-phase electric energy parameter measurement circuit, an output device and an STA object communication module, the three-phase electric energy parameter measurement 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 output signals and topology network identification information according to the received voltage information, the output device is used for sending the output signals and the topology network identification information, the micro control unit is connected with the external gateway/repeater through the STA object communication module, and the STA object 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 may 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 is further capable of being connected to the external gateway/repeater through an RS485 serial port.
In an embodiment of the invention, the SCT241H carrier chip uses a power line to perform high-speed transmission on analog or digital signals in an HPLC communication mode, the active front end is connected to the power line and outputs a dc voltage, and the Hash data memory is used for storing data of the STA physical communication module.
In an embodiment of the present invention, the STA physical communication module further includes a TTL serial port and an LED lamp.
In an embodiment of the invention, the electric energy acquisition terminal further comprises a memory, a real-time clock, an alarm and an LED indicator lamp.
In an embodiment of the invention, the output device further includes a micro-power wireless communication module, which is used for connecting with 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, configured to connect to the handheld operation and maintenance terminal by bluetooth.
Compared with the prior art, the miniaturized electric energy metering device based on the HPLC communication technology has the following advantages:
1. the product has the length, width and height of 160mm, 65mm and 70mm, is small in size and has the volume which is about one third of that of a common three-phase ammeter in the market, and is equivalent to that of a guide rail type three-phase ammeter.
2. 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. Each node in the network can be monitored by application of the topology identification function.
Drawings
FIG. 1 is a schematic diagram of a miniaturized electrical energy metering device based on HPLC communication technology according to one embodiment of the present invention;
fig. 2 is a schematic diagram of an STA communication module of a miniaturized power metering device based on HPLC communication technology according to an embodiment of the present invention;
The main reference numerals illustrate:
The system comprises a 1-electric energy acquisition terminal, a 101-micro control unit, a 102-three-phase electric energy parameter measurement circuit, 103-output equipment, 104-STA physical communication module, 105-memory, 106-real-time clock, 107-alarm, 108-LED indicator lamp, 1041-SCT241H carrier chip, 1042-active front end, 1043-Hash data memory, 1044-TTL serial port, 1045-LED lamp, 2-three-phase current transformer/single-phase current transformer, 3-gateway/repeater and 4-hand-held operation and maintenance terminal.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
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 acquisition terminal 1 capable of being connected to a three-phase current transformer/single-phase current transformer 2 and receiving three-phase/single-phase current signals, and also capable of being connected to an external gateway/repeater 3 for transmitting the processed signals into the gateway/repeater 3
Specifically, the electric energy collection terminal 1 includes a Micro Control Unit (MCU) 101, a three-phase electric energy parameter measurement circuit 102, an output device 103, and an STA physical communication module 104.
The three-phase power parameter measurement circuit 102 is used for receiving signals of the three-phase current transformer/single-phase current transformer 2, measuring voltage information, and then transmitting the voltage information to the Micro Control Unit (MCU) 101.
The Micro Control Unit (MCU) 101 can perform operation according to the received voltage information to obtain an output signal to complete topology identification. The topology identification can obtain topology network identification information, and according to the newly added topology change information and the discovery list, the standard protocol function network topology information and the multi-network information are combined to form complete topology network change, 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 according to 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 power 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 acquisition terminal 1.
The handheld operation and maintenance terminal 4 may be a dedicated handheld mobile device, or may 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 for being connected 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 configured to connect to the handheld operation and maintenance terminal 4 by 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 physical communication module 104 for transmitting an output signal of the micro control unit 101 and receiving an external all request operation. The STA communication module 104 supports baud rate adaptation, and reduces the volume of the product to the maximum extent on the premise of maintaining the HPLC carrier communication function. The external gateway/repeater 3 is able to receive this output signal and to receive the operating state of the metering ammeter sent by the external central controller.
In addition, the Micro Control Unit (MCU) 101 can also be connected to the external gateway/repeater 3 through an RS485 serial port.
The specifications of the STA physical communication module 104 are as follows:
the working frequency band is 0.7-12 MHz (supporting frequency band division);
modulation mode is OFDM;
the working voltage is DC 12V + -1V DC 5V + -1V;
power consumption: static power is less than or equal to 0.6W dynamic power is less than or equal to 1.5W;
the working temperature is-40-70 ℃ and is of the level of C3;
the storage and working humidity is less than or equal to 95 percent (no condensation)
In the present invention, the structure diagram of the STA physical communication module 104 is shown in fig. 2, and includes an SCT241H carrier chip 1041, an active front end 1042, and a Hash data memory 1043. The SCT241H carrier chip 1041 transmits analog or digital signals at high speed by an HPLC communication system using a power line. The active front end 1042 is connected to the power line, draws sine wave ac from the power grid, rectifies the ac, and outputs dc voltage to power the STA communication module 104. The Hash data storage 1043 is used for storing data of the STA physical communication module 104.
The STA physical communication module 104 further includes a TTL serial port 1044 and an LED lamp 1045. The TTL serial port 1044 is used for being connected to an external device, and the LED lamp 1045 is used for displaying the working state of the STA object communication module 104.
The power harvesting terminal 1 further comprises a memory 105, a real time clock 106, an alarm 107 and an LED indicator light 108. The memory 105 is used for storing information processed and received by the electric energy collection terminal 1, so as to facilitate subsequent operator searching. The real time clock 106 can provide time synchronization. The alarm 107 includes an audible and visual module capable of providing audible and visual alarms in the event of an abnormal condition in the power harvesting terminal 1. The LED indicator lamp 108 can display the working state of the electric energy acquisition terminal 1, so that the electric energy acquisition terminal is convenient for operators to observe and operate.
When the invention is operated, the three-phase electric energy parameter measuring circuit 102 measures voltage information according to signals 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, and then sends the electric energy metering information and topology network identification information to a handheld operation and maintenance terminal 4 for common operator to check through the output equipment 103 and sends the electric energy metering information and topology network identification information to the external gateway/repeater 3 through the STA physical communication module 104
The foregoing descriptions of specific exemplary embodiments of the present invention are 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 the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various 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 (7)
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