CN220064249U - Split type multifunctional electric power instrument - Google Patents
Split type multifunctional electric power instrument Download PDFInfo
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- CN220064249U CN220064249U CN202321214472.8U CN202321214472U CN220064249U CN 220064249 U CN220064249 U CN 220064249U CN 202321214472 U CN202321214472 U CN 202321214472U CN 220064249 U CN220064249 U CN 220064249U
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- 238000004146 energy storage Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 6
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
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- 238000010521 absorption reaction Methods 0.000 description 1
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Abstract
The utility model provides a split type multifunctional electric power instrument, which structurally comprises a signal acquisition part and an information display part, wherein the signal acquisition part and the information display part are respectively independent and mutually separated, the signal acquisition part and the information display part are connected in a communication connection mode, when the multifunctional electric power instrument is installed and used, the signal acquisition part is arranged in a cabinet body, and the information display part is arranged in the cabinet door. According to the utility model, the multifunctional electric power instrument is separated into the signal acquisition part and the information display part, and the signal acquisition part and the information display part can be connected in a simple manner, wherein the acquisition part is arranged inside the control cabinet and is close to the signal acquisition part, the wiring is shorter, the information display part is arranged on the cabinet door, the inspection is convenient, the whole installation wiring is convenient and simple, and the later maintenance is facilitated.
Description
Technical Field
The utility model relates to the technical field of power supply metering instruments, and particularly provides a split type multifunctional electric power instrument.
Background
The multifunctional electric power instrument has the functions of programmable measurement, display, digital communication, electric energy pulse transmission output and the like, can be used for completing electric quantity measurement, electric energy calculation, data display, acquisition and transmission, and can be widely applied to substation automation, distribution automation, intelligent building, electric energy measurement, management and assessment in enterprises.
The multifunctional power meter can measure three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, active power (absorption) and reactive power (inductance).
The multifunctional electric power instrument can be divided into an active electric power instrument, a reactive electric power instrument, a maximum demand meter, a standard electric power instrument, a multi-rate time-sharing electric power instrument, a prepayment electric power instrument (coin-feed type, magnetic card type and electric card type), a loss electric power instrument, a multifunctional electric power instrument and an intelligent electric power instrument according to the application, and can be divided into an induction type (mechanical type), a static type (electronic type) and an electromechanical type (hybrid type) according to the working principle, and can be divided into an alternating current meter and a direct current meter according to the property of an access power supply, and can be divided into an integral type and a split type according to the property of an access phase line, a single-phase three-phase four-wire electric power instrument and a three-phase four-wire electric power instrument according to the installation wiring mode, and can be divided into a direct access type and an indirect access type according to the installation wiring mode.
The multifunctional electric power instrument is a multifunctional instrument for measuring the electric quantity of high and low power networks. When the multifunctional electric power instrument is used, the multifunctional electric power instrument is required to be integrally inlaid in a cabinet door of the switch cabinet, so that a user can observe electric power data and the opening and closing state conveniently. Because the external wiring of multi-functional electric power instrument as measurement and control function includes a large amount of circuits such as signal acquisition, alarm output, signal output, a large amount of outside pencil one end inserts the multi-functional electric power instrument body of installing in the cabinet door, and the other end passes through the switch cabinet door and links to each components and parts in the cabinet, gathers, as shown in fig. 2, and because signal acquisition position is far away from electric power instrument, can only user loaded down with trivial details wiring technology.
Disclosure of Invention
The multifunctional electric power instrument is a multifunctional instrument for measuring the electric quantity of a high-voltage power grid and a low-voltage power grid, is designed by adopting a modern microprocessor and an alternating current sampling technology, has powerful data acquisition and processing functions, and is suitable for measuring all common electric power parameters and real-time electric quantity in the power grid, measuring electric energy, analyzing electric power quality, and counting and recording data. Through multichannel switching value and analog output, fault alarm, relay protection, high accuracy clock and 2 way communication interface's function, possess the function: electric energy metering, harmonic measurement, alarm or monitoring, control, communication. The multifunctional meter is applied to a power switch cabinet and a power distribution cabinet; the information display part of the multifunctional electric power instrument is embedded in the cabinet doors of the switch cabinet and the power distribution cabinet, so that the observation and the recording are convenient.
The technical task of the utility model is to provide a split type multifunctional electric power instrument aiming at the problems in the background technology.
The utility model provides a split type multifunctional electric power instrument, multifunctional electric power instrument's structure includes signal acquisition part and information display part, signal acquisition part and information display part are the structure of independent mutual separation each other, connect through the mode of communication connection between signal acquisition part and the information display part, multifunctional electric power instrument installs when using, and signal acquisition part sets up in the cabinet is internal, and information display part sets up in the cabinet door.
Further, the structure of the signal acquisition part comprises a power signal acquisition chip RN7302 and a main data processing chip, wherein the main data processing chip is a single MCU (micro control unit) GD32F103RBT6.
Furthermore, the power signal collection chip RN7302 has functions of collection, calculation and data retention, and after the collection of the power parameters, the data of the power system including current, voltage, frequency, active power, reactive power, electric power and power factor are calculated, and the data are stored in the data retention area of the power signal collection chip RN 7302.
Furthermore, the structure of the signal acquisition part further comprises an SPI communication serial port, the single MCU GD32F103RBT6 communicates and exchanges data with the power signal acquisition chip RN7302 through the SPI communication serial port, reads the power data in the power signal acquisition chip RN7302, calculates and holds the read power data to obtain alarm information, sends out an alarm signal, detects an opening and closing state, stores energy state and controls opening and closing. An analog signal of 4-20mA is sent out through AD conversion.
The SPI communication, which works in master-slave mode, typically has a master device and one or more slave devices, requires at least 4 wires, in fact 3 (when transmitting unidirectionally). Also common to all SPI-based devices are SDI (data in), SDO (data out), SCK (clock), CS (chip select).
(1) SDO-master data output, slave data input;
(2) SDI-master data input, slave data output;
(3) An SCLK-clock signal generated by the master device;
(4) The CS-slave enable signal is controlled by the master.
Furthermore, the information display part is structured as a human-computer interface color touch screen, and the MCU is read and displayed with the power data and the switching-on and switching-off states of the GD32F103RBT6. Parameters may be set by touching. A man-machine conversation is performed.
Furthermore, the structure of the signal acquisition part also comprises an interface chip RS-485MAX485ESA, the single-chip MCU GD32F103RBT6 provides 2 paths of Modbus_RS485 communication through the interface chip RS-485MAX485ESA,
one path is provided for a third party monitoring system, and the other path is provided for a human-computer interface color touch screen of the information display part.
Furthermore, the human-computer interface color touch screen of the information display part reads the power data of the MCU GD32F103RBT6, and displays the data and the on-off state for a user to read information.
Further, the wiring terminal of the signal acquisition part comprises a current transformer connecting end, a current signal connecting end, a power supply connecting end, an analog output end and the like.
Furthermore, the signal acquisition part and the information display part communicate in a modbus_RS485 communication mode, and the signal acquisition part provides power supply for the signal display part. The signal acquisition part is separated from the information display part by using a 4-core signal cable for connection, and only 4-core signal wires are needed for laying, so that the use of a large number of wire harnesses is reduced; the signal acquisition part is connected in a concentrated way, so that the length of a signal cable output by the signal acquisition part is reduced, and a large number of wire harnesses penetrate through a cabinet door.
Further, the signal acquisition part and the information display part adopt Bluetooth wireless transmission. Under the condition of eliminating signal interference, bluetooth wireless connection is adopted, so that the use of connecting wires is further reduced, and the installation and the use are further facilitated.
Compared with the prior art, the split type multifunctional electric power instrument has the following outstanding beneficial effects:
according to the utility model, the multifunctional electric power instrument is separated into the signal acquisition part and the information display part, and the signal acquisition part and the information display part can be connected in a simple manner, wherein the acquisition part is arranged inside the control cabinet and is close to the signal acquisition part, the wiring is shorter, the information display part is arranged on the cabinet door, the inspection is convenient, the whole installation wiring is convenient and simple, and the later maintenance is facilitated.
Drawings
FIG. 1 is a schematic diagram of the structure of a split-type multifunctional power meter of the present utility model;
FIG. 2 is a schematic diagram of a conventional multifunctional power meter;
FIG. 3 is a circuit connection diagram of the split-type multifunctional power meter of the present utility model;
FIG. 4 is a wiring diagram of a signal acquisition section;
fig. 5 is a wiring diagram of the information display section;
fig. 6 is a schematic diagram of the wiring of the RN7302 chip.
Detailed Description
The utility model will be described in further detail with reference to the drawings and examples.
Example 1
As shown in fig. 1, a split type multifunctional electric power instrument, the structure of multifunctional electric power instrument includes signal acquisition part and information display part, signal acquisition part and information display part are the structure of independent mutual separation each other, connect through the mode of communication connection between signal acquisition part and the information display part, when multifunctional electric power instrument installs and uses, signal acquisition part sets up in the cabinet is internal, and information display part sets up in the cabinet door.
The signal acquisition part and the information display part are communicated in a 485 communication mode and are connected by using a 4-core signal cable, and as the signal acquisition part is separated from the information display part, only 4-core signal wires are required to be laid, so that the use of a large number of wire harnesses is reduced; the signal acquisition part is connected in a concentrated way, so that the length of a signal cable output by the signal acquisition part is reduced, and a large number of wire harnesses penetrate through a cabinet door.
As shown in fig. 3, the structure of the signal acquisition part comprises a power signal acquisition chip RN7302 and a main data processing chip, wherein the main data processing chip is a single-chip MCU: GD32F103RBT6.
The power signal acquisition chip RN7302 has functions of acquisition, calculation and data retention, and after the power parameters are acquired, the power system data including current, voltage, frequency, active, reactive, electric energy and power factor are calculated, and the data are stored in the data retention area of the power signal acquisition chip RN 7302.
The structure of the signal acquisition part further comprises an SPI communication serial port, the single MCU GD32F103RBT6 communicates and exchanges data with the power signal acquisition chip RN7302 through the SPI communication serial port, reads power data in the power signal acquisition chip RN7302, calculates and holds the read power data to obtain alarm information, sends out an alarm signal, and detects the opening and closing state and the energy storage state.
The information display part is structured as a human-machine interface color touch screen.
The signal acquisition part also comprises a chip RS-485MAX485ESA, and the single-chip MCU GD32F103RBT6 provides 2 paths of Modbus_RS485 communication through the chip RS-485MAX485ESA, wherein one path is provided for a third party monitoring system, and the other path is provided for a human-computer interface color touch screen of the information display part.
And the human-computer interface color touch screen reads the power data of the MCU GD32F103RBT6, and displays the data and the opening and closing states for a user to read information.
As shown in fig. 4 and 5, the wiring terminal of the signal acquisition part includes a current transformer connection end, a voltage signal connection end, a power supply connection end, an analog output end, and the like, and is used for connecting a current transformer and a current signal, and is connected with the human-computer interface color touch screen through an interface.
As shown in fig. 6, the RN7032 is a power acquisition chip, which is a multifunctional high-precision three-phase metering special chip and is suitable for three-phase four-wire and three-phase three-wire applications.
The RN7302 integrates 7-path sigma-delta ADC, reference voltage, digital signal processing, etc. circuits, and is capable of measuring active, reactive, PQS and RMS apparent power and energy of each phase and combined phase, and providing 7 paths of ac/dc effective values, voltage-current vector sum effective values, 6 paths of phase angles, power factors, voltage line frequencies, zero crossing detection, voltage phase sequence detection, etc. parameters for a complete set of fundamental wave parameters and harmonic effective values.
RN7302 provides flexible ADC-synchronous sample data buffering for harmonic analysis.
RN7302 provides a software library of power quality parameters such as harmonics, three-phase imbalance, voltage flicker and ripple, voltage sudden rise and fall, voltage interruption, etc. And provides an SPI interface.
The power supply monitoring circuit inside the RN7302 can ensure reliable operation of the chip when power is up and off.
The GD32F103RBT6 is a 32-bit general microcontroller based on ARMCortex TM-M3RISC core, and has the optimal proportion in the aspects of processing capacity, power consumption reduction and peripheral equipment setting. cortex-M3 is a next generation processor core that is tightly coupled to a Nested Vector Interrupt Controller (NVIC), sysTick timer and advanced debug support. GD32F103RBT6 contains ARMCortex TM-M332 bit processor cores operating at 108MHz frequency, flash accesses zero wait state for maximum efficiency. It provides up to 3MB of on-chip flash memory and up to 96KB of SRAM memory. A wide range of enhanced I/o and peripherals are connected to both APB buses. The device provides up to 3 12-bit adc, up to 2 12-bit dac, up to 10 universal 16-bit timers, two basic timers plus two PWM advanced control timers, and standard and advanced communication interfaces of up to 3 spi, 2I 'c,3 USARTs,2 UARTs, 2I's, 1 USB2.0FS,1 CAN and 1 SDIO. The power supply voltage is 2.6V-3.6V, and the temperature range is-40 ℃ to +85 ℃.
Example 2
On the basis of the above embodiment, the signal acquisition part and the information display part in this embodiment adopt bluetooth wireless transmission. Under the condition of eliminating signal interference, bluetooth wireless connection is adopted, so that the use of connecting wires is further reduced, and the installation and the use are further facilitated.
The above embodiments are only preferred embodiments of the present utility model, and it is intended that the common variations and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the scope of the present utility model.
Claims (9)
1. The split type multifunctional electric power instrument is characterized by comprising a signal acquisition part and an information display part, wherein the signal acquisition part and the information display part are respectively independent and mutually separated, and the signal acquisition part and the information display part are connected in a communication mode;
the structure of the signal acquisition part comprises a power signal acquisition chip RN7302 and a main data processing chip, wherein the main data processing chip is a single MCU (micro control unit) GD32F103RBT6.
2. The split-type multifunctional power meter according to claim 1, wherein the power signal acquisition chip RN7302 has functions of acquisition, calculation and data holding, acquires power parameters and calculates power system data including current, voltage, frequency, active, reactive, electric energy, power factor, and stores the data in a data holding area of the power signal acquisition chip RN 7302.
3. The split type multifunctional power meter according to claim 2, wherein the structure of the signal acquisition part further comprises an SPI communication serial port, the single-chip MCU GD32F103RBT6 communicates with the power signal acquisition chip RN7302 and exchanges data through the SPI communication serial port, reads power data in the power signal acquisition chip RN7302, calculates and stores the read power data to obtain alarm information, sends out an alarm signal, detects a switching-on/switching-off state and an energy storage state.
4. A split-type multifunctional power meter according to claim 3, wherein the structure of the information display part comprises a display area data processing chip and a man-machine interface color touch screen.
5. The split multifunctional power meter according to claim 4, wherein the signal acquisition part further comprises an RS-485MAX485ESA, and the single MCU GD32F103RBT6 provides 2 paths of Modbus_RS485 communication through the RS-485MAX485ESA, one path of which is provided for a third party monitoring system, and the other path of which is provided for a human-computer interface color touch screen of the information display part.
6. The split multifunctional power meter according to claim 5, wherein the human-computer interface color touch screen reads and displays power data output by the MCU GD32F103RBT6.
7. The split-type multifunctional power meter according to claim 1, wherein the wiring terminal of the signal acquisition part comprises a current transformer connection terminal, a voltage signal connection terminal, a power supply connection terminal and an analog output terminal.
8. The split multifunctional power meter according to claim 5, wherein the signal acquisition part and the information display part are in communication connection in a modbus_rs485 communication manner, and are connected by using a 4-core signal cable.
9. The split-type multifunctional power meter according to any one of claims 1-2, wherein the signal acquisition part and the information display part adopt bluetooth wireless transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321214472.8U CN220064249U (en) | 2023-05-19 | 2023-05-19 | Split type multifunctional electric power instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321214472.8U CN220064249U (en) | 2023-05-19 | 2023-05-19 | Split type multifunctional electric power instrument |
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| CN220064249U true CN220064249U (en) | 2023-11-21 |
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| CN202321214472.8U Active CN220064249U (en) | 2023-05-19 | 2023-05-19 | Split type multifunctional electric power instrument |
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- 2023-05-19 CN CN202321214472.8U patent/CN220064249U/en active Active
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