CN206209012U - A kind of distribution transformer monitoring terminal system based on double-MSP 430 - Google Patents

Abstract

The utility model discloses a kind of distribution transformer monitoring terminal system based on double-MSP 430, including one-level CPU, two grades of CPU, signal acquisition and conditioning units, I2C bus circuits unit, watchdog unit, output unit and communication module；The signal acquisition gathers the three-phase output voltage signal and current signal of transformer with the input of conditioning unit, and the signal acquisition is connected the input of one-level CPU with the output end of conditioning unit；Input of the output end of the one-level CPU respectively with two grades of CPU, the watchdog unit, the output unit is connected；The one-level CPU is also respectively with the communication module and the I2C bus circuits unit in being bi-directionally connected.Compared with prior art, this power transformer detecting terminal system simple structure, data easily storage is easily read, and reliability high stability is strong.

Description

A kind of distribution transformer monitoring terminal system based on double-MSP 430

Technical field

The utility model is related to field transformer, more particularly to a kind of distribution transformer monitoring terminal based on double-MSP 430 System.

Background technology

With the development and the continuous improvement of the people's material and cultural life level of national economy, the electric utility of China is rapid Development, power network constantly expands, requirement of the user to power supply quality and power supply reliability also more and more higher, and this requires supply of electric power Department provides safe, economic, reliable and high-quality electric power.The modernization of power system must as China's electric utility development Right trend, and power distribution automation is then one of them important part.

Electrical power distribution automatization system is collection computer technology, automatic control technology, data communication technology and associate power system System technology information management control system.Distribution transformer monitoring terminal, and abbreviation TTU（Transformer Terminal Unit）Important component in electrical power distribution automatization system, it is mainly completed in electrical power distribution automatization system For the collection of distribution system real time data such as voltage, electric current etc., the real-time monitoring to distribution transformer is realized, ensure power distribution system The reliability service of system.While the utilization rate in order to improve equipment, will also correspondingly possess the function of idle control.

The country has had R＆D institution and producer to be proposed transformer control end product, and puts into operation, achieves one Fixed effect.Generally speaking, the product released has certain technology application value, has obtained the accreditation of some users, But still have the following defect.

（1）It is used mostly special computation chip, special external interface circuit, with circuit complexity, unitary function, valency The shortcomings of lattice are expensive.

（2）Functionally see, precision is low, can not carry out frequency analysis and electric energy metrical, quality of voltage statistical function are simple Deng.

（3）From hardware technology, existing product is used mostly more peripheral expansion module, system it is relatively costly；Make With the A/D converter compared with low rate and resolution ratio, Alternating Current Sampling Precision and calculate, disposal ability it is inadequate；Large Copacity is not used FLASH memory, switching data amount of storage and time can not meet application requirement under non real-time communication condition, and easily lose Lose；Do not consider with the various communication scheme interfaces of distribution automation, reserve communication interface not enough etc. defect.

Utility model content

The purpose of this utility model is to provide a kind of distribution transformer monitoring terminal system based on double-MSP 430, to solve Above-mentioned problems of the prior art.

To realize the purpose of this utility model, the utility model provides a kind of distribution transformer prison based on double-MSP 430 Survey terminal system, including one-level CPU, two grades of CPU, signal acquisition and conditioning units, I2C bus circuits unit, watchdog unit, Output unit and communication module；The signal acquisition gathers the three-phase output voltage signal of transformer with the input of conditioning unit And current signal, the signal acquisition is connected the input of one-level CPU with the output end of conditioning unit；The one-level CPU's is defeated Go out input of the end respectively with two grades of CPU, the watchdog unit, the output unit to be connected；The one-level CPU also divides It is in be bi-directionally connected not with the communication module and the I2C bus circuits unit.

Wherein, the signal acquisition with conditioning unit is made up of voltage/current transformer group and signal conditioning circuit；Institute State voltage/current transformer group input gather transformer three-phase output voltage signal and current signal, its output end with The input connection of the signal conditioning circuit；The output end of the signal conditioning circuit connects with the input of the one-level CPU Connect.

Wherein, the one-level CPU and two grades of CPU use MSP43OF149 chips；The one-level CPU is negative Blame the CPU element of the function of distributing transformer monitoring；Two grades of CPU are MMI units；Between the one-level CPU and two grades of CPU It is connected by spi bus, realizes the execute-in-place in addition to RS-232 mouthfuls of controller.

Wherein, the I2C bus circuits unit is made up of I2C buses, clock chip and memory；The clock chip It is in be bi-directionally connected to pass through I2C buses with one-level CPU with memory.

Wherein, the one-level CPU includes PCF8563 clock chips and AT24C1024 memory chips, the PCF8563 Clock chip and AT24C1024 memory chips are connected with I2C buses.

Wherein, the watchdog circuit module is by AAT3221IGV-3.O-Tl power supply chips and TPS3823 house dog cores Piece and peripheral circuit are constituted；The AAT3221IGV-3.O-Tl power supply chips are the power supply chips that 5V turns 3.3V.

Wherein, two grades of CPU include the peripheral circuit being made up of LCD display module and keyboard output module；The LCD The input of display module is connected with the output end of two grades of CPU；The output end of the keyboard output module and two grades of inputs of CPU End connection.

Compared with prior art, the beneficial effects of the utility model are：There is provided a kind of phase that can effectively gather power network Data are closed, by after a series of Mathematical treatments, the data for obtaining can really reflect the actual feelings of distribution transformer at that time The distribution transformer monitoring terminal of condition.The terminal can be analyzed to the electric network data for collecting, by required analyze data such as It is real be saved in memory, it is necessary to when the data of preservation can accurately be read out, or display is on a liquid crystal display, Or upper level is sent to by communication module；Device is provided simultaneously with communication function, can will run and analyze with communication channel is crossed Data send upper level to, while communication transfer Plays agreement can be met；Terminal can be by optical relay output control electricity The switching of container, to realize for idle automatic quick compensation；Diverse geographic location and severe site environment are adapted to, therefore Device should be particularly ensured that functional reliability and stability.

Brief description of the drawings

Fig. 1 show overall structure block diagram of the present utility model.

Fig. 2 show the interface circuit schematic diagram of 24C1O24 and MSP430F149 in the utility model.

Fig. 3 show the principle schematic of watchdog circuit in the utility model.

Fig. 4 show the structured flowchart of two grades of CPU and its peripheral circuit in the utility model.

Fig. 5 show liquid crystal display and two grades of circuit connection diagrams of CPU in the utility model.

Specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.

It should be noted that " connection " described herein and the word for expressing " connection ", such as " being connected ", " connected " etc., it both may refer to a certain part and had been directly connected to another part, it is also possible to refer to a certain part by other portions Part is connected with another part.

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, embodiment of the present utility model, the distribution transformer based on double-MSP 430 Monitoring terminal system, including one-level CPU, two grades of CPU, signal acquisition and conditioning unit, I2C bus circuits unit, house dog lists Unit, output unit and communication module；The signal acquisition gathers the three-phase output voltage of transformer with the input of conditioning unit Signal and current signal, the signal acquisition are connected the input of one-level CPU with the output end of conditioning unit；The one-level CPU Input of the output end respectively with two grades of CPU, the watchdog unit, the output unit be connected；The one-level CPU Also respectively with the communication module and the I2C bus circuits unit in being bi-directionally connected.

Further, the signal acquisition and conditioning unit are by voltage/current transformer group and signal conditioning circuit structure Into；The input of the voltage/current transformer group gathers the three-phase output voltage signal and current signal of transformer, its output End is connected with the input of the signal conditioning circuit；The input of the output end of the signal conditioning circuit and the one-level CPU End connection.

Further, the one-level CPU and two grades of CPU use MSP43OF149 chips；The one-level CPU It is responsible for the CPU element of the function of distributing transformer monitoring；Two grades of CPU are MMI units；The one-level CPU and two grades of CPU Between by spi bus be connected, realize the execute-in-place in addition to RS-232 mouthfuls of controller.

Further, the I2C bus circuits unit is made up of I2C buses, clock chip and memory；The clock Chip and memory are in be bi-directionally connected with one-level CPU by I2C buses.

Further, the one-level CPU includes PCF8563 clock chips and AT24C1024 memory chips, described PCF8563 clock chips and AT24C1024 memory chips are connected with I2C buses.

Further, the watchdog circuit module is guarded the gate by AAT3221IGV-3.O-Tl power supply chips and TPS3823 Dog chip and peripheral circuit are constituted；The AAT3221IGV-3.O-Tl power supply chips are the power supply chips that 5V turns 3.3V.

Further, two grades of CPU include the peripheral circuit being made up of LCD display module and keyboard output module；Institute The input for stating LCD display module is connected with the output end of two grades of CPU；The output end of the keyboard output module and two grades of CPU Input connection.

It should be noted that the dual-CPU system that the utility model is constituted using one-level, two grades of two pieces of CPU, and be all MSP430F149 single-chip microcomputers, the modules to periphery are controlled, and six roads electricity is carried out using high-accuracy voltage, current transformer Current voltage is sampled, and the voltage and current signal of three-phase is sent into MSP430F149 12 analog-digital converters of built-in chip type simultaneously respectively and is entered Row high accuracy is changed.And software merit rating sampling channel is used, and determine sample sequence, preserve sampled result.

In order to significant data is not lost after preserving substantial amounts of switching data and ensureing power down, system is employed outside piece EEPROM is used as data storage.PCF8563 clock chips are used for system provides basis of time.

After being crashed in order to avoid the operation that MSP43O series monolithics occurred, external house dog direct reduction MSP430 is mono- The reseting pin of piece machine cannot make the phenomenon of MSP430 monolithic processor resettings, and what watchdog reset was taken is the power supply of reset single-chip microcomputer Power supply is reaching the effect of reset single-chip microcomputer.

One-level CPU is worked in SPI communications with slave pattern, and two grades of CPU are worked with holotype, two pieces of SPI communication ports of CPU All undertaken by USART1.A SPI of the present invention communication only master one from, it is not necessary to chip selection signal SS, so the present invention uses three Line mode.Two pieces of CPU are also otherwise varied in hardware initialization.

Communication between dual processors in the present invention, menu interface is determined residing for man-machine interface.Change in button triggering menu During change, two grades of CPU pile up the functional inquiry that this menu interface needs are performed in transmission caching, and enable transmission interruption by hair Send the data is activation in caching to go out, and receive the data that one-level CPU sends, the data unpacking treatment for obtaining will be received, so Wait communication again afterwards.

PCF8563 is the clock chip of a CMOS, and its effect is the calibration system time.Usually device normally runs When, the time in PCF8563 can be read at a certain moment of one day, oneself reaches the purpose of calibration system time；When device power-off Or after reset is restarted, system can equally obtain run time from clock chip, to reach the purpose of cycle accurate preservation.

AT24C1024 is a eeprom memory.Distribution transformer monitoring terminal is operationally, it is necessary to service data Or analyze data is preserved, to deal with calling of the following upper level communication center for such data, therefore one piece of capacity is fitted When memory be necessary, the AT24C1024 in the present apparatus is that I2C drives, can be by I2C bus read-write memories, most Large Copacity is up to 128k bytes.

Two grades of CPU and its interlock circuit undertake the function of human-machine interface unit in the present invention.It includes two grades of CPU, LCD Module and input through keyboard.Two grades of CPU are connected by SPI with one-level CPU, and two grades of CPU of setting are host mode in SPI communications, One-level CPU is slave mode.LCD display module is that liquid crystal display is an important module in human-machine interface unit, and it is The main display module at distribution transformer monitoring terminal scene.

The LCD that the utility model is used is a 128x64 disassembling graphs liquid crystal display, is directly connect with two grades of CPU Mouthful, with 8 standard data bus, 6 control lines and power line.The built-in two pieces of KSO108 lcd drive controllers of module, point The Zuo Qu and You Qu of other control display screen, each drive module carry a 64x64 display-memory, and CS1 and CS2 are respectively The piece choosing that 2 displays drive.Only support parallel interface mode.

The above is only preferred embodiment of the present utility model, it is noted that general for the art For logical technical staff, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these change Enter and retouch also to should be regarded as protection domain of the present utility model.

Claims (7)

1. a kind of distribution transformer monitoring terminal system based on double-MSP 430, it is characterised in that including one-level CPU, two grades of CPU, Signal acquisition and conditioning unit, I2C bus circuits unit, watchdog unit, output unit and communication module；The signal acquisition The three-phase output voltage signal and current signal of transformer are gathered with the input of conditioning unit, the signal acquisition is single with conditioning The input of the output end connection one-level CPU of unit；The output end of the one-level CPU respectively with two grades of CPU, the house dog The input connection of unit, the output unit；The one-level CPU is also electric with the communication module and the I2C buses respectively Road unit is in be bi-directionally connected.

2. a kind of distribution transformer monitoring terminal system based on double-MSP 430 according to claim 1, it is characterised in that institute Signal acquisition is stated with conditioning unit is made up of voltage/current transformer group and signal conditioning circuit；The voltage/current mutual inductance The input of device group gathers the three-phase output voltage signal and current signal of transformer, its output end and the signal conditioning circuit Input connection；The output end of the signal conditioning circuit is connected with the input of the one-level CPU.

3. a kind of distribution transformer monitoring terminal system based on double-MSP 430 according to claim 1, it is characterised in that institute State one-level CPU and two grades of CPU use MSP43OF149 chips；The one-level CPU is responsible for distribution transformer prison The CPU element of the function of survey；Two grades of CPU are MMI units；Pass through spi bus phase between the one-level CPU and two grades of CPU Even, the execute-in-place in addition to RS-232 mouthfuls of controller is realized.

4. a kind of distribution transformer monitoring terminal system based on double-MSP 430 according to claim 1, it is characterised in that institute Stating I2C bus circuit units is made up of I2C buses, clock chip and memory；The clock chip and memory pass through I2C Bus is in be bi-directionally connected with one-level CPU.

5. a kind of distribution transformer monitoring terminal system based on double-MSP 430 according to claim 1, it is characterised in that institute One-level CPU is stated including PCF8563 clock chips and AT24C1024 memory chips, the PCF8563 clock chips and AT24C1024 memory chips are connected with I2C buses.

6. a kind of distribution transformer monitoring terminal system based on double-MSP 430 according to claim 1, it is characterised in that institute It is by AAT3221IGV-3.O-Tl power supply chips and TPS3823 watchdog chips and peripheral circuit structure to state watchdog circuit module Into；The AAT3221IGV-3.O-Tl power supply chips are the power supply chips that 5V turns 3.3V.

7. a kind of distribution transformer monitoring terminal system based on double-MSP 430, two grades of CPU bags according to claim 1 Include the peripheral circuit being made up of LCD display module and keyboard output module；The input of the LCD display module and two grades of CPU Output end connection；The output end of the keyboard output module is connected with the input of two grades of CPU.