CN203414526U - Intelligent electrical parameter monitoring meter - Google Patents

Abstract

The utility model is an intelligent electric parameter monitor, which belongs to the technical field of electric parameter monitoring devices for power supply lines; the technical problem to be solved is: to provide an intelligent electric parameter monitor which is convenient for real-time monitoring and has a remote communication function; the adopted technical scheme It is: an intelligent electrical parameter monitor, including: single-chip microcomputer, three-phase electric energy metering chip, CT current acquisition module, PT voltage acquisition module, temperature sensor, switch value sensor, signal switch control module, GPRS communication module, Wi-Fi communication module, UART module, EEPROM module, LCD display, LED status indicator, function keys and power supply module; the utility model is applicable to the electric power department.

Description

An intelligent electrical parameter monitor

technical field

The utility model relates to an intelligent electric parameter monitor, in particular to a device for on-line real-time monitoring of electric parameters and faults of power supply lines.

Background technique

With the process of social digitization, the monitoring requirements for power quality in national defense, industry, civil and other fields are becoming more and more stringent. The economical, reliable and efficient operation of power grids is closely related to the overall national economic strength and people's living standards. The use of power It has become a standard to measure a country's industrial development level.

In recent years, with the sudden increase in power consumption, the establishment of major power plants and grid connection, national networking, construction of UHV power grids, optimization of household power grids, etc., all urgently need to know the power quality and need more accurate and efficient power. At the same time, in the face of increasingly complex power grids, it is of great significance to quickly and accurately find fault sources and hidden faults. Therefore, real-time, accurate and efficient acquisition of electrical parameters and fast and accurate transmission and processing of data Become an important indicator of meter technology.

With the sudden increase in the demand for electric meter equipment, many products have appeared on the market, but there are still some deficiencies: ①The equipment is low in modularization, and the instrument is bulky, which is not convenient for transportation and installation; ②Handheld equipment cannot be detected online in real time. Human operation and analysis are required; ③Data cannot be transmitted back or use RS485, RJ45, RS232 and other transmission methods that consume a large amount of wire, which fail to achieve distributed collection and intensive processing, which reduces work efficiency and wastes a lot of resources ; ④The power supply mode is single, which is not conducive to use in various environments and reduces its applicability; ⑤Does not have the functions of environmental temperature monitoring and important equipment temperature monitoring; ⑥Cannot remotely change parameters, read data and process control; ⑦Cannot be online Real-time detection of power supply line faults caused by short circuit, open circuit, etc.; ⑧ only monitoring the electrical parameters of one-phase or three-phase power supply lines, which not only increases the cost but also increases the difficulty of installation and maintenance.

To sum up, with the development of industrialized society, the demand for high-quality power is becoming more and more serious. To develop a set of online monitoring system that can monitor the operation status of power supply lines in real time, and automatically monitor and intelligently analyze the distributed monitoring and intensive processing of electric energy metering. Monitoring equipment is of great significance.

Utility model content

The utility model overcomes the deficiencies of the prior art, and the technical problem to be solved is: to provide an intelligent electric parameter monitor which is convenient for real-time monitoring and has a remote communication function.

In order to solve the above technical problems, the technical solution adopted by the utility model is: an intelligent electrical parameter monitor, including: a single-chip microcomputer, a three-phase electric energy metering chip, a CT current acquisition module, a PT voltage acquisition module, a temperature sensor, and a switch sensor , Signal switch control module, GPRS communication module, Wi-Fi communication module, UART module, EEPROM module, LCD display, LED status indicator, function keys and power supply module;

The single-chip microcomputer is respectively connected with a three-phase electric energy metering chip, a temperature sensor, a switch sensor, a signal switch control module, a GPRS communication module, a Wi-Fi communication module, a UART module, an EEPROM module, an LCD display screen, an LED status indicator light and a function key connected, the signal output terminals of the CT current acquisition module and the PT voltage acquisition module are respectively connected with the signal input ports of the three-phase electric energy metering chip, and the SPI port of the three-phase electric energy metering chip is connected with the above-mentioned EEPROM module; the power supply module Provide power for the entire intelligent electrical parameter monitor.

The UART module is connected with an RJ45 interface module, an RS232 interface module, an RS485 interface module and a USB interface module.

The power module includes a commercial power module and a storage battery module.

Described single-chip microcomputer adopts the single-chip microcomputer model that is PLC16F1937.

The three-phase electric energy metering chip adopts the electric energy metering chip model ATT7022.

The model of the EEPROM module is AT24C32.

Compared with the prior art, the utility model has the beneficial effects that: the utility model has a high degree of equipment modularization, can realize real-time and automatic monitoring functions, has the functions of monitoring power quality and monitoring line faults, and has various communication methods , can realize remote communication and control; the whole adopts modular design, relying on single-chip microcomputer control, convenient function expansion and strong practicability.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Fig. 1 is the schematic diagram of circuit structure of the present utility model;

In the figure: 1 is a single-chip microcomputer, 2 is a three-phase electric energy measurement chip, 3 is a CT current acquisition module, 4 is a PT voltage acquisition module, 5 is a temperature sensor, 6 is a switch sensor, 7 is a signal switch control module, and 8 is GPRS Communication module, 9 is Wi-Fi communication module, 10 is UART module, 11 is EEPROM module, 12 is LCD display, 13 is LED status indicator, 14 is function button, 15 is power supply module, 16 is RJ45 interface module, 17 is an RS232 interface module, 18 is an RS485 interface module, and 19 is a USB interface module.

Detailed ways

As shown in Fig. 1, a kind of intelligent electrical parameter monitor of the present invention comprises: single-chip microcomputer 1, three-phase electric energy metering chip 2, CT current acquisition module 3, PT voltage acquisition module 4, temperature sensor 5, switch quantity sensor 6, Signal switch control module 7 , GPRS communication module 8 , Wi-Fi communication module 9 , UART module 10 , EEPROM module 11 , LCD display 12 , LED status indicator 13 , function keys 14 and power supply module 15 .

The single-chip microcomputer 1 is respectively connected with the three-phase electric energy metering chip 2, the temperature sensor 5, the switching value sensor 6, the signal switch control module 7, the GPRS communication module 8, the Wi-Fi communication module 9, the UART module 10, the EEPROM module 11, and the LCD display The screen 12, the LED status indicator light 13 are connected with the function keys 14, and the signal output terminals of the CT current acquisition module 3 and the PT voltage acquisition module 4 are respectively connected with the signal input ports of the three-phase electric energy metering chip 2, and the three-phase electric energy The SPI port of the metering chip 2 is connected to the above-mentioned EEPROM module 11; the power supply module 15 supplies power for the entire intelligent electrical parameter monitor.

The above-mentioned CT current acquisition module 3 and PT voltage acquisition module 4 can have multiple, respectively collect the current and voltage information of the power supply line, and send the collected information to the three-phase electric energy metering chip 2, and the three-phase electric energy metering chip 2 outputs The electrical parameters and electric energy are metered to the single-chip microcomputer 1; the temperature sensor 5 and the switching value sensor 6 have multiple, collect temperature and monitor the switch state of the equipment, and send the information to the single-chip microcomputer 1; there is a clock timing in the single-chip microcomputer 1, when setting When the time arrives or when an instruction to read data is received, the single-chip microcomputer 1 reads the data of the EEPROM module 11 and uploads it to the host computer or local display, and the single-chip microcomputer 1 judges whether there is a malfunction or a fault through the collected power supply line information, as well as the faulty phase line and type, and upload and display the fault information locally; the function key 14 is composed of a function/confirm key and an arrow key, and the function/confirm key scrolls to switch the local address setting, three-phase three-wire and three-phase four-wire selection, brightness adjustment, Clock setting, electrical parameter display and other functions, when switching to the next function and confirming the function setting, the direction keys scroll to adjust the addition/subtraction of each variable, and the long/short key realizes the fast/slow adjustment.

Described UART module 10 is connected with RJ45 interface module 16, RS232 interface module 17, RS485 interface module 18 and USB interface module 19, and above-mentioned intelligent electrical parameter monitoring instrument can send the information that gathers to monitoring terminal by multiple communication modes; The power supply module 15 includes a mains module and a storage battery module, and adopts dual power supplies for power supply. When the power supply line fails and the power is cut off, the storage battery starts to supply power to support the normal operation of the equipment, so that the equipment can normally display faults and read data locally; The single-chip microcomputer 1 adopts a single-chip microcomputer model PLC16F1937, the three-phase electric energy metering chip 2 adopts an electric energy metering chip model ATT7022, and the model of the EEPROM module 11 is AT24C32.

When in use, the utility model is installed in a place that is easy to operate and maintain, the CT current acquisition module 3 and the PT voltage acquisition module 4 are installed on the corresponding power lines, the temperature sensor 5 is fastened on the equipment that needs to be monitored, and the switch The quantity sensor 6 is connected to the equipment that needs to be monitored, and the communication module is plugged in; power on and start, manually set the address of the machine, the wiring mode of the monitored power line, adjust the backlight brightness of the LCD display 12, and press the left and right buttons for two seconds to enter the automatic mode. In the inspection mode, it automatically tests whether the functional modules such as data collection, transmission, and status indication are operating normally. It can be controlled remotely through the communication module.

When the line is running normally, the above-mentioned CT current acquisition module 3 and PT voltage acquisition module 4 collect the current value and voltage value of the power supply line in real time online, and input the corresponding signal input terminal of the three-phase electric energy metering chip 2, and the three-phase electric energy metering chip 2 according to The collected signal is analyzed and calculated for various electrical parameters and electric energy metering, and is input to the EEPROM module 11 through SPI to wait for the single-chip microcomputer 1 to read. When the single-chip microcomputer 1 arrives at the set time, it can be set to read continuously in real time, or receive the instruction to read data Afterwards, read the data in the EEPROM module 11, if it is a button command, it will be displayed locally by the LCD display screen 12, if the set time arrives or the upper computer instruction, then the data will be uploaded to the upper computer through the communication module.

When the power supply line fails, the values collected by the above-mentioned CT current acquisition module 3 and PT voltage acquisition module 4 will change suddenly; the single-chip microcomputer 1 starts to read the electrical parameters in real time, and analyzes and calculates whether the signal is a malfunction or the cause of the failure, if it is a failure Then determine the phase line and fault type of the fault, and upload the fault status to the host computer and local display through the communication module, until the reset setting time is up or the device works normally after manual reset; in the real-time signal transmission mode (power consumption Relatively large), the real-time signal will have the clock time of MCU 1, and the fault information can also be obtained in real time by comparing and analyzing the data of two adjacent devices.

The utility model has a high degree of modularization of equipment, can realize real-time and automatic monitoring functions, has the functions of monitoring power quality and monitoring line faults, and has various communication methods, and can realize remote communication and control; the whole adopts modular design , relying on single-chip microcomputer control, convenient function expansion and strong practicability.

Claims (6)

1. An intelligent electrical parameter monitor, characterized in that it includes: a single-chip microcomputer (1), a three-phase electric energy metering chip (2), a CT current acquisition module (3), a PT voltage acquisition module (4), a temperature sensor (5 ), switch sensor (6), signal switch control module (7), GPRS communication module (8), Wi-Fi communication module (9), UART module (10), EEPROM module (11), LCD display (12 ), LED status indicators (13), function buttons (14) and power modules (15); The single-chip microcomputer (1) is respectively connected with the three-phase electric energy metering chip (2), temperature sensor (5), switching value sensor (6), signal switch control module (7), GPRS communication module (8), Wi-Fi communication module (9), UART module (10), EEPROM module (11), LCD display (12), LED status indicator light (13) and function button (14) are connected, and the CT current acquisition module (3) and PT voltage The signal output terminals of the acquisition module (4) are respectively connected to the signal input ports of the three-phase electric energy metering chip (2), and the SPI port of the three-phase electric energy metering chip (2) is connected to the above-mentioned EEPROM module (11); the power supply The module (15) supplies power for the entire intelligent electrical parameter monitor. 2. An intelligent electrical parameter monitor according to claim 1, characterized in that: the UART module (10) is connected with an RJ45 interface module (16), an RS232 interface module (17), and an RS485 interface module (18) and USB interface module (19). 3. An intelligent electrical parameter monitor according to claim 1 or 2, characterized in that: the power supply module (15) includes a mains module and a storage battery module. 4. An intelligent electrical parameter monitor according to claim 3, characterized in that: the single-chip microcomputer (1) adopts a single-chip microcomputer whose model is PLC16F1937. 5. An intelligent electrical parameter monitor according to claim 3, characterized in that: the three-phase electric energy metering chip (2) adopts an electric energy metering chip of model ATT7022. 6. An intelligent electrical parameter monitor according to claim 3, characterized in that: the model of the EEPROM module (11) is AT24C32.

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