CN202583318U - Three-phase harmonic wave electric energy meter based on ADE7878 chip - Google Patents
Three-phase harmonic wave electric energy meter based on ADE7878 chip Download PDFInfo
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- CN202583318U CN202583318U CN 201120521941 CN201120521941U CN202583318U CN 202583318 U CN202583318 U CN 202583318U CN 201120521941 CN201120521941 CN 201120521941 CN 201120521941 U CN201120521941 U CN 201120521941U CN 202583318 U CN202583318 U CN 202583318U
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Abstract
The utility model discloses a three-phase harmonic wave electric energy meter based on an ADE7878 chip. The three-phase harmonic wave electric energy meter includes the ADE7878 chip which samples the current and voltage analog signals of each phase, and then carries out the analog-digital conversion, and finally calculates the total harmonic wave content and the electrical parameters, such as the current, the voltage, the active power, the reactive power, the apparent power, the power factor; an IIC communication channel which transmits the electrical parameters and the total harmonic wave current, voltage, and power to an MCU module; a DMA communication channel which transmits the sampling instantaneous value of the current and voltage analog signal of each phase to the MCU module; and the MCU module which receives the electrical parameters and the total harmonic wave current, voltage, and power, and uses the sampling instantaneous value of the current and voltage analog signal of each phase to rapidly calculate the required subharmonic by Fourier transform calculation.
Description
[technical field]
The utility model relates to a kind of electric energy meter, particularly a kind of three phase harmonic electric energy meter based on the ADE7878 chip.
[background technology]
Along with high-tech development; The electric network pollution that various civilian consumers, industrial large-sized consumer are introduced is more and more serious, and the total and subharmonic content of wherein introducing AC network has become people and assessed power grid quality and the very important important parameter of electric energy metrical.And traditional electric energy meter adopts conventional electric energy computation chip, and sampling rate and arithmetic speed are slower, and parameters such as basic electric current, voltage, power only can be provided, and the electrical quantity relevant with harmonic wave can't be provided; ADE7878 self can also provide total harmonic current, voltage, power except parameters such as basic electric current, voltage, power can be provided, parameters such as subharmonic electric current, voltage, power can't be provided.
[utility model content]
The technical matters that the utility model will solve provides a kind of three phase harmonic electric energy meter based on the ADE7878 chip; Can provide and comprise the electric parameters relevant such as electric current, voltage, meritorious, idle, applied power, power factor with all-wave; Relevant with it total relevant electric parameter of subharmonic that reaches can be provided again, realize the band harmonic measure of a cheapness and the electric energy meter of function of measuring.
Above-mentioned technical matters solves through following technical scheme:
A kind of three phase harmonic electric energy meter based on the ADE7878 chip is characterized in that, comprising:
One is used for each phase current voltage analog signal is sampled and carried out analog-to-digital conversion to calculate the ADE7878 chip of the electric parameter that comprises electric current, voltage, meritorious, idle, applied power, power factor and total harmonic current, voltage, power;
One is used to transmit said electric parameter gives the I IC communication channel of following MCU module with total harmonic current, voltage, power;
One is used to transmit the DMA communication channel of the sampled instantaneous value of each phase current voltage analog signal to following MCU module;
Reaching one is used to receive said electric parameter and total harmonic current, voltage, power and utilizes the sampled instantaneous value of each the phase current voltage analog signal that receives to carry out the MCU module that Fast Fourier Transform (FFT) calculates needed subharmonic electric current, voltage, power.
Comprise that also one is used for respectively ABC three-phase current, voltage signal to the input electric energy meter and carries out analog filtering, the conditioning of voltage signal amplitude to convert the front end analog signal conditioner circuit of the voltage signal that the ADE7878 chip can Direct Sampling into.
Being provided with one in the said ADE7878 chip, to be used for each phase current voltage analog signal is sampled and carried out analog-to-digital conversion be that the multi-channel A C module and of Bitstream signal is used to utilize Bitstream signal to calculate the DSP module of said electric parameter and total harmonic distortion.
Also being provided with one in the said ADE7878 chip is used for each phase current voltage analog signal of input is simulated amplification to be given to the programmable gain amplifier of said multi-channel A C module.
Comprise that also one is used for to give corresponding each functional module of this electric energy meter the power circuit module of working power being provided from the outside ABC phase voltage signal power taking of system.
Comprise that also one is used for the working battery of working power being provided for corresponding each functional module of this electric energy meter in system's external power source outage continued.
Said MCU module is connected with a display module and a key-press module.
Said MCU module is provided with the various switching values that are used to import, export this ammeter, control signal to be used for and the be incorporated into the power networks auxiliary terminal of usefulness of miscellaneous equipment.
Said MCU module is provided with communication interface, and said communication interface comprises one or several in RS485, far infrared, near infrared, GPRS, GSM, CDMA, small wireless, the Ethernet.
Said MCU module is provided with one and is used to provide the idle pulse delivery outlet that has of examining and determine the ammeter measuring accuracy.
Said MCU module is connected with one and is used to this electric energy meter the real-time clock of time accurately and reliably is provided.
Said real-time clock is connected with one and is used to system's external power source outage continued provides working power to real-time clock clock battery.
Visible by technique scheme; The utility model can calculate on the basis of the electric parameter relevant with all-wave such as electric current, voltage, meritorious, idle, applied power, power factor and total harmonic current, voltage, power at the ADE7878 chip; And calculate subharmonic electric current, voltage, power through the MCU module, realize the band harmonic measure of a cheapness and the electric energy meter of function of measuring.
[description of drawings]
Fig. 1 is the principle assumption diagram of the utility model.
[embodiment]
As shown in Figure 1; The utility model is based on the three phase harmonic electric energy meter of ADE 7878 chips; Comprise the front end analog signal conditioner circuit, ADE7878 chip and the MCU module that connect successively; Front end analog signal conditioner circuit is provided with ABC phase voltage input end and ABC phase current input end; Be provided with the programmable gain amplifier, multi-channel A C module and the DSP module that connect successively in the ADE7878 chip, programmable gain amplifier is connected with front end analog signal conditioner circuit, is provided with IIC communication channel and DMA communication channel between ADE7878 chip and the MCU module; The MCU module is connected with real-time clock, display module and key-press module, and the MCU module is provided with auxiliary terminal, communication interface and idle pulse delivery outlet is arranged; In the present embodiment, display module is the LCD LCD MODULE.
The power source design of this ammeter is; Be provided with a power circuit module and a working battery; The power circuit module is connected with ABC phase voltage input end also working power is provided for corresponding each functional module of this ammeter after process voltage transformation, the Filtering Processing from the outside ABC phase voltage signal power taking of system; Working battery provides working power for corresponding each functional module of this ammeter in system's external power source outage continued, and working battery is the low-power consumption battery; Simultaneously, real-time clock is connected with the clock battery, and the clock battery provides working power for system's external power source outage continued to real-time clock.
The principle of work of the utility model is:
A, B, C three-phase current, voltage signal correspondence are from ABC phase current input end and the input of ABC phase voltage input end; Front end analog signal conditioner circuit carries out a series of processing such as analog filtering, the conditioning of voltage signal amplitude to A, B, C three-phase current, the voltage signal of input electric energy meter respectively, and is converted into the voltage signal that the ADE7878 chip can Direct Sampling; ADE7878 chip internal programmable gain amplifier is set needs according to the user and respectively the simulating signal of input is simulated amplification; Then this signal being transferred to chip internal multi-channel A C module (also claims; Multichannel ∑ Δ type high-precision adc); This multi-channel A C module is converted into Bitstream signal to each analog signal sampling respectively, and the Bitstream signal after the analog-to-digital conversion carries out digital signal processing by ADE7878 chip internal high-speed dsp module to it then through follow-up a series of digital lowpasses, high-pass filtering; Completion comprises the electric parameter that electric current, voltage, meritorious, idle, applied power, power factor etc. are relevant with all-wave and the calculating of total harmonic distortion; And (IIC also claims I2C, Inter-Integrated Circuit to utilize the IIC passage; The twin wire universal serial bus) gives MCU module (also claiming high-speed data management MCU) with the electric parameter that calculates and total harmonic current, voltage, power delivery; The ADE7878 chip utilizes DMA communication channel (DMA simultaneously; Direct Memory Access; Direct memory access) gives the MCU module with three-phase current, voltage sample instantaneous value (obtaining) active upload in real time by multi-channel A C module samples; By this MCU module these each data of uploading are carried out fast Fourier (FFT) conversion then, accomplish the calculating of needed subharmonic; Simultaneously, the MCU module is in charge of auxiliary terminal, idle pulse delivery outlet, communication interface, display module and key-press module is arranged.
Real-time clock is that ammeter provides clock accurately and reliably, for the time-shared charge of ammeter, logout etc. provide markers; The various switching values, control signal that auxiliary terminal is input, export this ammeter are to be used for and the miscellaneous equipment usefulness that is incorporated into the power networks; Display module according to the user use, design demand provides various electric parameters, parameter is set, status information, user profile etc.; Key-press module is each parameter that cooperates display module to be used for checking ammeter; It is the port that is used to provide calibrating ammeter measuring accuracy that idle pulse delivery outlet is arranged; Communication interface comprises one or several in RS485, far infrared, near infrared, GPRS, GSM, CDMA, small wireless, the Ethernet, mainly accomplishes mutual, parameter setting that ammeter and other peripherals carry out information.
The utility model is not limited to the foregoing description, based on simple replacement the foregoing description, that do not make creative work, should belong to the scope that the utility model discloses.
Claims (10)
1. the three phase harmonic electric energy meter based on the ADE7878 chip is characterized in that, comprising:
One is used for each phase current voltage analog signal is sampled and carried out analog-to-digital conversion to calculate the ADE7878 chip of the electric parameter that comprises electric current, voltage, meritorious, idle, applied power, power factor and total harmonic current, voltage, power;
One is used to transmit said electric parameter gives the IIC communication channel of following MCU module with total harmonic current, voltage, power;
One is used to transmit the DMA communication channel of the sampled instantaneous value of each phase current voltage analog signal to following MCU module;
Reaching one is used to receive said electric parameter and total harmonic current, voltage, power and utilizes the sampled instantaneous value of each the phase current voltage analog signal that receives to carry out the MCU module that Fast Fourier Transform (FFT) calculates needed subharmonic electric current, voltage, power.
2. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1; It is characterized in that, comprise that also one is used for respectively ABC three-phase current, voltage signal to the input electric energy meter and carries out analog filtering, the conditioning of voltage signal amplitude to convert the front end analog signal conditioner circuit of the voltage signal that the ADE7878 chip can Direct Sampling into.
3. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1 and 2; It is characterized in that being provided with one in the said ADE7878 chip, to be used for each phase current voltage analog signal is sampled and carried out analog-to-digital conversion be that the multi-channel A C module and of Bitstream signal is used to utilize Bitstream signal to calculate the DSP module of said electric parameter and total harmonic distortion.
4. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 3 also is provided with one and is used for each phase current voltage analog signal of input is simulated amplification to be given to the programmable gain amplifier of said multi-channel A C module in the said ADE7878 chip.
5. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1 and 2; It is characterized in that, comprise that also one is used for to give corresponding each functional module of this electric energy meter the power circuit module of working power being provided from the outside ABC phase voltage signal power taking of system.
6. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1 and 2 is characterized in that, comprises that also one is used for the working battery of working power being provided for corresponding each functional module of this electric energy meter in system's external power source outage continued.
7. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1 and 2 is characterized in that, said MCU module is provided with the various switching values that are used to import, export this ammeter, control signal to be used for and the be incorporated into the power networks auxiliary terminal of usefulness of miscellaneous equipment.
8. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1 and 2; It is characterized in that; Said MCU module is provided with communication interface, and said communication interface comprises one or several in RS485, far infrared, near infrared, GPRS, GSM, CDMA, small wireless, the Ethernet.
9. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1 and 2 is characterized in that, said MCU module is provided with one and is used to provide the idle pulse delivery outlet that has of examining and determine the ammeter measuring accuracy.
10. the three phase harmonic electric energy meter based on the ADE7878 chip according to claim 1 and 2; It is characterized in that; Said MCU module is connected with one and is used to this electric energy meter the real-time clock of time accurately and reliably is provided, and said real-time clock is connected with one and is used to system's external power source outage continued provides working power to real-time clock clock battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120521941 CN202583318U (en) | 2011-12-13 | 2011-12-13 | Three-phase harmonic wave electric energy meter based on ADE7878 chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120521941 CN202583318U (en) | 2011-12-13 | 2011-12-13 | Three-phase harmonic wave electric energy meter based on ADE7878 chip |
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| Publication Number | Publication Date |
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| CN202583318U true CN202583318U (en) | 2012-12-05 |
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| CN 201120521941 Expired - Lifetime CN202583318U (en) | 2011-12-13 | 2011-12-13 | Three-phase harmonic wave electric energy meter based on ADE7878 chip |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023046A (en) * | 2012-12-10 | 2013-04-03 | 乐山晟嘉电气有限公司 | Zero passage switching filtering reactive compensation device based on digital signal processor (DSP) chip control |
| CN103364632A (en) * | 2013-06-25 | 2013-10-23 | 乐清市人和电气科技有限公司 | Intelligent digital display instrument |
| CN103901267A (en) * | 2012-12-26 | 2014-07-02 | 苏州工业园区新宏博通讯科技有限公司 | Current signal wireless receiving type electric energy meter |
| CN103926462A (en) * | 2014-04-28 | 2014-07-16 | 东南大学 | Rapid harmonic wave analyzing method and device of power system |
| CN104090177A (en) * | 2014-06-11 | 2014-10-08 | 国家电网公司 | Power network operation data intelligent test analyzer |
| CN105067879A (en) * | 2015-08-24 | 2015-11-18 | 湖州高鼎智能科技有限公司 | Multifunctional electric meter |
| CN105445545A (en) * | 2015-10-30 | 2016-03-30 | 国网新疆电力公司电力科学研究院 | IEC62056-standard-based three-phase harmonic fiber electric energy meter |
| CN106527254A (en) * | 2015-09-11 | 2017-03-22 | 罗伯特·博世有限公司 | Integrated circuit |
| CN109358229A (en) * | 2018-09-28 | 2019-02-19 | 深圳市中电电力技术股份有限公司 | A kind of power adaptive calculation method, system and storage medium |
| CN109633267A (en) * | 2018-12-17 | 2019-04-16 | 江苏方天电力技术有限公司 | A kind of three phase harmonic measuring device based on wireless transmission |
| CN113238094A (en) * | 2014-12-25 | 2021-08-10 | 德克萨斯仪器股份有限公司 | Bidirectional electric energy meter |
| CN115436871A (en) * | 2022-10-11 | 2022-12-06 | 石家庄科林电气股份有限公司 | Method for preventing zero line missing electricity stealing of single-phase electric energy meter based on low power consumption |
-
2011
- 2011-12-13 CN CN 201120521941 patent/CN202583318U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023046B (en) * | 2012-12-10 | 2016-01-27 | 乐山晟嘉电气有限公司 | Based on the operating passing zero filtering reactive power compensator that dsp chip controls |
| CN103023046A (en) * | 2012-12-10 | 2013-04-03 | 乐山晟嘉电气有限公司 | Zero passage switching filtering reactive compensation device based on digital signal processor (DSP) chip control |
| CN103901267A (en) * | 2012-12-26 | 2014-07-02 | 苏州工业园区新宏博通讯科技有限公司 | Current signal wireless receiving type electric energy meter |
| CN103364632A (en) * | 2013-06-25 | 2013-10-23 | 乐清市人和电气科技有限公司 | Intelligent digital display instrument |
| CN103926462A (en) * | 2014-04-28 | 2014-07-16 | 东南大学 | Rapid harmonic wave analyzing method and device of power system |
| CN103926462B (en) * | 2014-04-28 | 2017-02-01 | 东南大学 | Rapid harmonic wave analyzing method and device of power system |
| CN104090177A (en) * | 2014-06-11 | 2014-10-08 | 国家电网公司 | Power network operation data intelligent test analyzer |
| CN113238094A (en) * | 2014-12-25 | 2021-08-10 | 德克萨斯仪器股份有限公司 | Bidirectional electric energy meter |
| CN105067879A (en) * | 2015-08-24 | 2015-11-18 | 湖州高鼎智能科技有限公司 | Multifunctional electric meter |
| CN106527254A (en) * | 2015-09-11 | 2017-03-22 | 罗伯特·博世有限公司 | Integrated circuit |
| CN105445545A (en) * | 2015-10-30 | 2016-03-30 | 国网新疆电力公司电力科学研究院 | IEC62056-standard-based three-phase harmonic fiber electric energy meter |
| CN109358229A (en) * | 2018-09-28 | 2019-02-19 | 深圳市中电电力技术股份有限公司 | A kind of power adaptive calculation method, system and storage medium |
| CN109358229B (en) * | 2018-09-28 | 2023-09-12 | 深圳市中电电力技术股份有限公司 | Power self-adaptive calculation method, system and storage medium |
| CN109633267A (en) * | 2018-12-17 | 2019-04-16 | 江苏方天电力技术有限公司 | A kind of three phase harmonic measuring device based on wireless transmission |
| CN115436871A (en) * | 2022-10-11 | 2022-12-06 | 石家庄科林电气股份有限公司 | Method for preventing zero line missing electricity stealing of single-phase electric energy meter based on low power consumption |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |