CN202854228U - Three phase electric energy metering system - Google Patents
Three phase electric energy metering system Download PDFInfo
- Publication number
- CN202854228U CN202854228U CN 201220424762 CN201220424762U CN202854228U CN 202854228 U CN202854228 U CN 202854228U CN 201220424762 CN201220424762 CN 201220424762 CN 201220424762 U CN201220424762 U CN 201220424762U CN 202854228 U CN202854228 U CN 202854228U
- Authority
- CN
- China
- Prior art keywords
- electric energy
- central processor
- phase electric
- processor cpu
- energy metering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Disclosed is a three phase electric energy metering system, comprising a current transformer CT and a voltage transformer PT which are arranged in the three phase electric power lines, wherein the current transformer CT is connected with a metering chip via a simulating switch; the voltage transformer PT is also connected with the metering chip; the metering chip is also connected with a central processor CPU; and the central processor CPU is connected with a memory. The three phase electric energy metering system of the utility model integrates the detection, metering, control, storage, display, and communication modules into one body, and is capable of realizing the multi-rate metering of peak valley time sharing.
Description
Technical field
The utility model relates to the power metering and monitoring design, specifically refers to the three-phase electric energy metering system.
Background technology
Electric energy metered system is the gauging instrument of weighing electric energy consumption quantity, and its technical requirement is very high.It had both required the energy accurate measurement, more required the energy steady operation, and can guarantee the reliability of long-term height.At present, because the growing tension of the energy in recent years, electric power supply shows a deficiency often, various places have been taked various counter-measures one after another, a lot of areas have coincidentally been put into effect Peak-valley TOU power price and have been kept away the peak electrovalence policy, and therefore, many rate scales market demand further strengthens, especially large industrial user is to the demand rapid growth of the many rate scales of three-phase.In addition, development along with hyundai electronics industry and electric system, electric energy metered system is to intelligent, multi-functional future development, many kinds of parameters can be measured, and metering circuit and the trend integrated, that modularization has become future development of the several functions such as automatic data logging, time-division charge rate, real-time rate, pre-payment can be realized.
The utility model content
The purpose of this utility model is to provide a kind of three-phase electric energy metering system, and the three-phase electric energy metering system among the design integrates the modules such as detection, metering, control, storage, demonstration, communication, and can realize the multiple rate metering of peak and valley time.
Implementation of the present utility model is as follows: the three-phase electric energy metering system, comprise the Current Transmit and the voltage transformer pt that are arranged in the three-phase power circuit, described Current Transmit is connected with computation chip by analog switch, voltage transformer pt also is connected with computation chip, described computation chip also is connected with central processor CPU, and described central processing unit is connected with storer.
Described central processor CPU also is connected with display.
Described central processor CPU also is connected with keyboard circuit.
Described central processor CPU also is connected with telecommunication circuit.
Telecommunication circuit is the RS-485 communication module, and central processor CPU is connected with host computer by the RS-485 communication module.
The model of central processor CPU is MC68HC908LJl2.
Computation chip is three-phase electrical energy computation chip ATT7022B.
Design concept of the present utility model is: the most important function of electric energy metered system is accurately to measure various electrical energy parameters, such as voltage, electric current, active power, reactive power, frequency, power factor, under-voltage and disconnected mutually detection, frequency analysis etc.Native system adopts special-purpose computation chip to detect electric signal, and namely three-phase electrical energy computation chip ATT7022B detects electric signal, is equipped with simultaneously central processor CPU (MC68HC908LJl2) programming and realizes several functions.System mainly partly is comprised of detection, metering, control, storage, demonstration, keyboard, communication interface and power supply etc.Wherein, the test section is by Current Transmit, voltage transformer pt and the peripheral processes the electric circuit constitute of precision, the real time datas such as the electric current that obtains, voltage, frequency, phase place can be input in the computation chip.Computation chip is by measuring each input signal, the various electrical energy parameters that metering can be obtained are input to control section (being in the central processor CPU), then determine by the program in the central processor CPU that it is delivered to those parameters in the storer after treatment and store, deliver to simultaneously the display part and show.High quality lcd is adopted in the display part, can show 4 row, 20 characters of every row.If need to realize the function of time-division charge rate, then can when programming, the electricity price of day part be enrolled in the program, then by the real-time clock Measuring Time, with the electricity price of determining this period and time-shared charge in addition.Telecommunication circuit adopts the RS-485 communication module and host computer communicates, and native system adopts the MAX4872 chip in the telecommunication circuit, and this chip is single+5 V Power supplies, 8 pins is arranged and use simple, convenient.If telecommunication circuit is received the order of line of electric force host computer, then command transfer is arrived central processor CPU, according to order electrical energy parameter is sent to host computer again, just can realize the functions such as automatic data logging and Long-distance Control like this.
Based on the consideration of the aspects such as performance and cost, can select the MC68HC908LJl2 of Freescale Semiconductor as the central processor CPU of electric energy metered system core component.MC68HC908IJl2 is a 8 MCU that are applicable to the electric energy metrical design, be based on the general-purpose device of HC08 framework, have the Flash storer of 12K byte, the RAM of 512 bytes, and an infrared communication interface, a Serial Peripheral Interface (SPI), an AD converter, 8 keyboard input interruptions and a lcd driver module.The computation chip of electric energy can be selected three-phase electrical energy computation chip ATT7022B.ATT7022B is a high precision and powerful multi-function electricity fraudulent using-proof principal wave harmonic wave three-phase electric energy the special metering IC, and this chip is applicable to phase three-wire three and three-phase and four-line is used, and uses very convenient.The voltage detecting circuit of ATT7022B inside can guarantee to power up and the time normal operation of cutting off the power supply, and it provides a SPI interface, can easily and carry out the transmission of measuring parameter and school mark parameter between the outside MCU.Storer then can adopt the ferroelectric memory FM33256 with the SPI interface.FM33256 be Ramtron company release a with high speed serialization SPI interface and include the peripheral series of products of FRAM processor, it has integrated non-volatile FRAM in compact package, can reduce cost, reduce circuit board space and the common function of support take processor as basic system, be suitable for very much advanced multifunctional electric energy meter.
The utility model has the advantage of: the three-phase electric energy metering system among the design integrates the modules such as detection, metering, control, storage, demonstration, communication, and can realize the multiple rate metering of peak and valley time.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Embodiment one
As shown in Figure 1.
The three-phase electric energy metering system, comprise the Current Transmit and the voltage transformer pt that are arranged in the three-phase power circuit, described Current Transmit is connected with computation chip by analog switch, voltage transformer pt also is connected with computation chip, described computation chip also is connected with central processor CPU, and described central processing unit is connected with storer.
Described central processor CPU also is connected with display.
Described central processor CPU also is connected with keyboard circuit.
Described central processor CPU also is connected with telecommunication circuit.
Telecommunication circuit is the RS-485 communication module, and central processor CPU is connected with host computer by the RS-485 communication module.
The model of central processor CPU is MC68HC908LJl2.
Computation chip is three-phase electrical energy computation chip ATT7022B.
Design concept of the present utility model is: the most important function of electric energy metered system is accurately to measure various electrical energy parameters, such as voltage, electric current, active power, reactive power, frequency, power factor, under-voltage and disconnected mutually detection, frequency analysis etc.Native system adopts special-purpose computation chip to detect electric signal, and namely three-phase electrical energy computation chip ATT7022B detects electric signal, is equipped with simultaneously central processor CPU (MC68HC908LJl2) programming and realizes several functions.System mainly partly is comprised of detection, metering, control, storage, demonstration, keyboard, communication interface and power supply etc.Wherein, the test section is by Current Transmit, voltage transformer pt and the peripheral processes the electric circuit constitute of precision, the real time datas such as the electric current that obtains, voltage, frequency, phase place can be input in the computation chip.Computation chip is by measuring each input signal, the various electrical energy parameters that metering can be obtained are input to control section (being in the central processor CPU), then determine by the program in the central processor CPU that it is delivered to those parameters in the storer after treatment and store, deliver to simultaneously the display part and show.High quality lcd is adopted in the display part, can show 4 row, 20 characters of every row.If need to realize the function of time-division charge rate, then can when programming, the electricity price of day part be enrolled in the program, then by the real-time clock Measuring Time, with the electricity price of determining this period and time-shared charge in addition.Telecommunication circuit adopts the RS-485 communication module and host computer communicates, and native system adopts the MAX4872 chip in the telecommunication circuit, and this chip is single+5 V Power supplies, 8 pins is arranged and use simple, convenient.If telecommunication circuit is received the order of line of electric force host computer, then command transfer is arrived central processor CPU, according to order electrical energy parameter is sent to host computer again, just can realize the functions such as automatic data logging and Long-distance Control like this.
Based on the consideration of the aspects such as performance and cost, can select the MC68HC908LJl2 of Freescale Semiconductor as the central processor CPU of electric energy metered system core component.MC68HC908IJl2 is a 8 MCU that are applicable to the electric energy metrical design, be based on the general-purpose device of HC08 framework, have the Flash storer of 12K byte, the RAM of 512 bytes, and an infrared communication interface, a Serial Peripheral Interface (SPI), an AD converter, 8 keyboard input interruptions and a lcd driver module.The computation chip of electric energy can be selected three-phase electrical energy computation chip ATT7022B.ATT7022B is a high precision and powerful multi-function electricity fraudulent using-proof principal wave harmonic wave three-phase electric energy the special metering IC, and this chip is applicable to phase three-wire three and three-phase and four-line is used, and uses very convenient.The voltage detecting circuit of ATT7022B inside can guarantee to power up and the time normal operation of cutting off the power supply, and it provides a SPI interface, can easily and carry out the transmission of measuring parameter and school mark parameter between the outside MCU.Storer then can adopt the ferroelectric memory FM33256 with the SPI interface.FM33256 be Ramtron company release a with high speed serialization SPI interface and include the peripheral series of products of FRAM processor, it has integrated non-volatile FRAM in compact package, can reduce cost, reduce circuit board space and the common function of support take processor as basic system, be suitable for very much advanced multifunctional electric energy meter.
As mentioned above, then can well realize the utility model.
Claims (7)
1. three-phase electric energy metering system, it is characterized in that: comprise the Current Transmit and the voltage transformer pt that are arranged in the three-phase power circuit, described Current Transmit is connected with computation chip by analog switch, voltage transformer pt also is connected with computation chip, described computation chip also is connected with central processor CPU, and described central processing unit is connected with storer.
2. three-phase electric energy metering according to claim 1 system, it is characterized in that: described central processor CPU also is connected with display.
3. three-phase electric energy metering according to claim 1 system, it is characterized in that: described central processor CPU also is connected with keyboard circuit.
4. the described three-phase electric energy metering of any one system according to claim 1-3, it is characterized in that: described central processor CPU also is connected with telecommunication circuit.
5. three-phase electric energy metering according to claim 4 system, it is characterized in that: telecommunication circuit is the RS-485 communication module, and central processor CPU is connected with host computer by the RS-485 communication module.
6. three-phase electric energy metering according to claim 4 system, it is characterized in that: the model of central processor CPU is MC68HC908LJl2.
7. three-phase electric energy metering according to claim 4 system, it is characterized in that: computation chip is three-phase electrical energy computation chip ATT7022B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220424762 CN202854228U (en) | 2012-08-27 | 2012-08-27 | Three phase electric energy metering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220424762 CN202854228U (en) | 2012-08-27 | 2012-08-27 | Three phase electric energy metering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202854228U true CN202854228U (en) | 2013-04-03 |
Family
ID=47985411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220424762 Expired - Fee Related CN202854228U (en) | 2012-08-27 | 2012-08-27 | Three phase electric energy metering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202854228U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630740A (en) * | 2012-08-27 | 2014-03-12 | 成都众山科技有限公司 | Three-phase electric energy metering system |
-
2012
- 2012-08-27 CN CN 201220424762 patent/CN202854228U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630740A (en) * | 2012-08-27 | 2014-03-12 | 成都众山科技有限公司 | Three-phase electric energy metering system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101593965B (en) | Intelligent low-voltage motor protector with function of electric energy measurement | |
| CN103645457B (en) | A kind of on-site inspection device for electric energy meter | |
| CN201845051U (en) | Three-phase intelligent electric energy meter | |
| CN204855786U (en) | From measurement formula ammeter accuracy testing check table | |
| CN203786168U (en) | Three-phase high-precision multifunctional electric energy meter | |
| CN207181562U (en) | Electric automobile charging pile movable type detection platform | |
| CN201311485Y (en) | Ripple factor detecting device adapted to DC power supply | |
| CN101464503A (en) | Electric energy quality monitoring terminal | |
| CN202075342U (en) | Three-phase SOC (system-on-chip) intelligent power meter | |
| CN201215505Y (en) | Digital weighing controller | |
| CN202854228U (en) | Three phase electric energy metering system | |
| CN205941878U (en) | On --spot check gauge of hand -held type electric energy meter | |
| CN201917610U (en) | Electric energy metering device | |
| CN201035053Y (en) | Three phase multifunctional electrical energy meter | |
| CN103630740A (en) | Three-phase electric energy metering system | |
| CN202058089U (en) | Digital power supply and external displaying device connected with same | |
| CN202649307U (en) | Embedded electric energy meter based on Ethernet | |
| CN210895798U (en) | Pre-payment guide rail meter based on NB-IOT | |
| CN102096458A (en) | Digital power supply and external display device connected with same | |
| CN202330553U (en) | Intelligent electronic electric energy meter | |
| CN202939219U (en) | Multichannel intelligent electric quantity module | |
| CN206369945U (en) | A kind of radio communication surveying instrument based on intelligent display device | |
| CN205176110U (en) | Intelligent electric power meter | |
| CN203672928U (en) | Novel guide rail type three-phase power meter hardware platform | |
| CN202975281U (en) | Grouping instrument for storage batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20130827 |