CN106093556A - Novel combination type intelligent electric energy meter - Google Patents
Novel combination type intelligent electric energy meter Download PDFInfo
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- CN106093556A CN106093556A CN201610366846.6A CN201610366846A CN106093556A CN 106093556 A CN106093556 A CN 106093556A CN 201610366846 A CN201610366846 A CN 201610366846A CN 106093556 A CN106093556 A CN 106093556A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
Abstract
The invention discloses a kind of novel combination type intelligent electric energy meter, including voltage x current Acquisition Circuit, SOC electric energy metering module, high-speed isolated communication module, data management MCU, logic card management MCU and main power source, also include three error sensing module, respectively A phase error sensing module, B phase error sensing module and C phase error sensing module and its be respectively used to that described A phase SOC electric energy metering module, described B phase SOC electric energy metering module and described C phase SOC electric energy metering module are carried out pulse and detect with clock pulses.The present invention can not only prevent the impact of external magnetic field, and timing electric energy meter can be carried out error-detecting, substantially increase the accuracy of electric energy meter, the most only need an electric energy meter, it is to avoid need multiple ammeter centralized arrangement to take bigger position in transformer station's dish cabinet.
Description
Technical field
The invention belongs to Regulation equipment technical field, especially relate to a kind of novel combination type intelligence electric energy
Table.
Background technology
Intelligent electric meter is that a kind of full electronic controls, is made up of measurement module, data processing module and communication module etc.
Multi-functional ammeter.This kind of ammeter have electric energy metrical, electricity consumption realtime monitoring, automatically control, information is mutual and number
According to functions such as process, meanwhile, relative to mechanical power energy meter, there is higher measuring accuracy.This ammeter can make user the rapidest
The electricity consumption situation of family is understood on ground, works out electricity consumption plan etc..Intelligent electric meter is the fundamental equipments of intelligent grid data acquisition,
Intelligent grid is realized to informationization, automatization, interactive has important supporting role, carries original energy data and adopt
Collection, the task of measuring and transmitting, be realize that information is integrated, basis that analysis optimization and information represent, improving electric power enterprise
Business efficiency, promotion energy-saving and emission-reduction, the stability aspect strengthening power system has played immeasurable effect.
Intelligent electric meter is that it can realize bidirectional real-time in place of being different from tradition ammeter, has the feature of interaction,
Real time data can be provided, provide possibility for implementing step price.Therefore, intelligent electric meter highlights information the most especially
Process, mutual, metering and communication capacity, in the intelligent grid standard that national grid is announced, the most to these important indicators
It is made that detailed regulation.
Intelligent electric meter will change the history of conventional manual metering, and staff only need to click the mouse just can grasp user's
Electricity consumption situation.And for a user, its electricity consumption situation will be more directly perceived, user can be perfectly clear to electricity consumption situation in family,
Improve electricity consumption transparency.In smart electric grid system, user can in the way of directly being transferred accounts by Web bank electricity payment,
Or the electricity charge of certain number that prestores in ammeter can be shifted to an earlier date, and need not in person go bank or business hall payment.By letter
Breath interactive function, ammeter can show current residual electricity or power consumption in real time, can be automatically reminded to when dump energy is too low use
Family is to pay in time.Visible, intelligent electric meter has preferable application prospect.
But, the electric energy meter great majority in transformer station's dish cabinet are centralized arrangement, and each interval is accomplished by installing one
Electric energy meter, causes the quantity needing more electric energy meter, takies bigger position.
Number of patent application 200820163184.3 discloses a kind of Three-phase Multi-functional Power Meter, including three-phase electric energy
SOC chip, the function treatment chip of band liquid crystal drive, three-phase electric energy SOC is connected to the input of function treatment chip,
Impulse output circuit, LCD display circuit, memorizer, infrared communication circuit, RS485 it has been also respectively connected with on function treatment chip
Circuit and the clock chip of band temperature-compensating, described three-phase electric energy SOC uses ATT7022B chip, and described memorizer uses
24LC256I chip.Be not provided with high-speed isolated communication module in this utility model electric energy meter, measure affected by magnetic fields seriously, outer magnetic
Field stealing electricity phenomenon is numerous.
Number of patent application 201320454020.7 discloses a kind of three-phase intelligent electric-energy meter, including management MCU, voltage conditioning
Circuit, current regulating circuit and SOC, voltage modulate circuit is connected with the AD sample port of this SOC, for by ABC
Reach SOC after three-phase voltage signal conversion, filtering and carry out voltage sample；The AD of current regulating circuit and this SOC adopts
Sample port connects, and reaches SOC and carry out current sample after being converted by ABCN tetra-phase current signal, filtering；This SOC
It is connected with management MCU by SPI interface, for being uploaded to manage in MCU by electric energy measurement data and real time clock data.This reality
By the existing the special metering IC of novel replacement or the design of general MCU+ADC；Substitute existing special reality simultaneously
Time clock chip.This utility model is not provided with high-speed isolated communication module, measure affected by magnetic fields seriously, external magnetic field stealing electricity phenomenon
Numerous, and error-detecting can not be carried out.
Summary of the invention
In view of this, it is an object of the invention to for the deficiencies in the prior art, it is provided that a kind of novel combination type intelligence electric energy
Table, can not only prevent the impact of external magnetic field, and electric energy meter can be carried out timing error-detecting, substantially increase electric energy
The accuracy of table, need an electric energy meter simultaneously only, it is to avoid needs multiple ammeter centralized arrangement to take in transformer station's dish cabinet
Bigger position.
For reaching above-mentioned purpose, the present invention by the following technical solutions:
Novel combination type intelligent electric energy meter, it is characterised in that: include voltage x current Acquisition Circuit, SOC electric energy metering module, at a high speed
Isolation communication module, data management MCU, logic card management MCU and main power source, described voltage x current Acquisition Circuit includes that A phase is electric
Current voltage Acquisition Circuit, B phase voltage current collection circuit and C phase voltage current collection circuit, described SOC electric energy metering module bag
Including A phase SOC electric energy metering module, B phase SOC electric energy metering module and C phase SOC electric energy metering module, described main power source is described
Voltage x current Acquisition Circuit, described data management MCU and described logic card management MCU provide electric energy；
Described A phase voltage current collection circuit carries out sample of signal metering, described B phase voltage current acquisition to A phase voltage electric current
Circuit carries out sample of signal metering to B phase voltage electric current, and described C phase voltage current collection circuit carries out letter to C phase voltage electric current
Number sampling metering；
Described A phase SOC electric energy metering module, described B phase SOC electric energy metering module and described C phase SOC electric energy metering module and institute
The connection stating high-speed isolated communication module all uses UART mode to connect；
Described high-speed isolated communication module uses UART mode to be connected with described data management MCU；
Described data management MCU uses SPI mode to be connected with described logic card management MCU；
Described logic card management MCU be connected to memory element, display unit, auxiliary terminal, pushbutton unit, communication interface and
Ground connection real-time clock；
Also include three error sensing module, respectively A phase error sensing module, B phase error sensing module and C phase error-detecting
Module and its be respectively used to described A phase SOC electric energy metering module, described B phase SOC electric energy metering module and described C phase SOC electricity
Pulse and clock pulses detection can be carried out by metering module；
Described A phase error sensing module, described B phase error sensing module and described C phase error sensing module are respectively by timing
Switch control module is connected with described main power source, described time switch control module be used for controlling described A phase error sensing module,
Described B phase error sensing module and the duty of described C phase error sensing module；
Described A phase error sensing module, described B phase error sensing module and described C phase error sensing module are respectively connected with standard
Table and standard time clock, be used for providing standard scale umber of pulse and standard time clock umber of pulse, by comparing ABC phase SOC electric energy metrical mould
The umber of pulse of block and standard scale umber of pulse, the error in dipping that ABC phase SOC electric energy metering module can be calculated the metering that will calculate
Error sends high-speed isolated communication module to, by comparing clock pulses number and the standard time clock of ABC phase SOC electric energy metering module
Umber of pulse, can calculate the clock frequency of ABC phase SOC electric energy metering module and send the clock frequency calculated to high-speed isolated
Communication module；
Described A phase voltage current collection circuit, described B phase voltage current collection circuit, described C phase voltage current collection circuit,
Described data management MCU, described logic card management MCU and described time switch control module are all by identification control module
It is connected with described main power source.
Described error sensing module include one-chip computer module, SWD download unit, pulse shaping unit, temperature detecting unit,
RS485 unit, CAN unit, acousto-optic warning unit and wireless transmit/receive units, wherein, described SWD unit is used for one-chip computer module
Download and on-line debugging；Described pulse shaping unit is for described error sensing module, described standard scale and described
The electric pulse shaping of standard time clock；Described temperature detecting unit carries out excess temperature report for detecting system temperature and temperature time too high
Alert；Described RS485 unit is for the communication of described error sensing module with described SOC electric energy metering module；Described CAN unit is used
Come with described one-chip computer module and management MCU communication, receive from described one-chip computer module or manage MCU order, to
Described one-chip computer module or management MCU return test data；The warning under abnormal conditions of the described acousto-optic warning unit；Institute
State wireless transmit/receive units for being wirelessly transferred detection data.
Described SOC electric energy metering module uses ADE7878 chip.
Described display unit is provided with translucent cover, and this transparent casing is provided with transparent antifog oxidant layer.
Described SOC electric energy metering module is provided with three-proofing coating layer.
The invention has the beneficial effects as follows:
The present invention uses three error sensing module of time switch control module co-controlling, and three error sensing module are examined respectively
Survey the umber of pulse of ABC phase SOC electric energy metering module and clock pulses number, and with the clock of the umber of pulse of standard scale with standard time clock
Umber of pulse compares, thus calculates error in dipping and the clock frequency of ABC phase SOC electric energy metering module；A by three-phase independence
Phase SOC electric energy metering module, B phase SOC electric energy metering module and C phase SOC electric energy metering module gather A phase, B phase and C phase respectively
Current/voltage analogue signal and convert thereof into corresponding digital signal, timesharing independent by high-speed isolated communication module passes
It is defeated by data management MCU, is carried out Correlation method for data processing by data management MCU, had idle pulse to export, then pass through high speed SPI
Road " in real time " be transferred to logic card management MCU, by logic card management MCU complete display, data storage, communication, function selecting with
And the work such as parametric data setting；Described display unit is provided with translucent cover, and this transparent casing is provided with transparent antifog oxidant layer,
Transparent casing is provided with transparent antifog oxidant layer, and antifog oxidant layer is removable and prevents steam condensation on transparent casing, reduces
The generation of fog, keeps sight line clear, should be widely promoted and apply；Described SOC electric energy metering module is provided with three-proofing coating layer,
Three-proofing coating layer has good high and low temperature resistance, becomes layer of transparent protecting film after its solidification, have superior insulation, protection against the tide,
The performances such as anticreep, shockproof, dust-proof, anticorrosion, anti-aging, Inverter fed motor, can protect electronic circuit board and thereon relevant set
Standby block is from the erosion in bad border.The present invention can not only prevent the impact of external magnetic field, and timing can carry out electric energy meter
Error-detecting, substantially increases the accuracy of electric energy meter, the most only need an electric energy meter, it is to avoid need in transformer station's dish cabinet
Multiple ammeter centralized arrangement and take bigger position.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the first embodiment of the present invention；
Fig. 2 is the theory diagram of the error sensing module of the present invention；
Fig. 3 is the theory diagram of the second embodiment of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 1 and Figure 2, novel combination type intelligent electric energy meter, it is characterised in that: include voltage x current Acquisition Circuit, SOC electricity
Energy metering module, high-speed isolated communication module, data management MCU, logic card management MCU and main power source, described voltage x current is adopted
Collector includes A phase voltage current collection circuit, B phase voltage current collection circuit and C phase voltage current collection circuit, described
SOC electric energy metering module includes A phase SOC electric energy metering module, B phase SOC electric energy metering module and C phase SOC electric energy metering module,
Described main power source is described voltage x current Acquisition Circuit, described data management MCU and described logic card management MCU provides electric energy；
Described A phase voltage current collection circuit carries out sample of signal metering, described B phase voltage current acquisition to A phase voltage electric current
Circuit carries out sample of signal metering to B phase voltage electric current, and described C phase voltage current collection circuit carries out letter to C phase voltage electric current
Number sampling metering；
Described A phase SOC electric energy metering module, described B phase SOC electric energy metering module and described C phase SOC electric energy metering module and institute
The connection stating high-speed isolated communication module all uses UART mode to connect；
Described high-speed isolated communication module uses UART mode to be connected with described data management MCU；
Described data management MCU uses SPI mode to be connected with described logic card management MCU；
Described logic card management MCU be connected to memory element, display unit, auxiliary terminal, pushbutton unit, communication interface and
Ground connection real-time clock；
Also include three error sensing module, respectively A phase error sensing module, B phase error sensing module and C phase error-detecting
Module and its be respectively used to described A phase SOC electric energy metering module, described B phase SOC electric energy metering module and described C phase SOC electricity
Pulse and clock pulses detection can be carried out by metering module；
Described A phase error sensing module, described B phase error sensing module and described C phase error sensing module are respectively by timing
Switch control module is connected with described main power source, described time switch control module be used for controlling described A phase error sensing module,
Described B phase error sensing module and the duty of described C phase error sensing module；
Described A phase error sensing module, described B phase error sensing module and described C phase error sensing module are respectively connected with standard
Table and standard time clock, be used for providing standard scale umber of pulse and standard time clock umber of pulse, by comparing ABC phase SOC electric energy metrical mould
The umber of pulse of block and standard scale umber of pulse, the error in dipping that ABC phase SOC electric energy metering module can be calculated the metering that will calculate
Error sends high-speed isolated communication module to, by comparing clock pulses number and the standard time clock of ABC phase SOC electric energy metering module
Umber of pulse, can calculate the clock frequency of ABC phase SOC electric energy metering module and send the clock frequency calculated to high-speed isolated
Communication module；
Described error sensing module include one-chip computer module, SWD download unit, pulse shaping unit, temperature detecting unit,
RS485 unit, CAN unit, acousto-optic warning unit and wireless transmit/receive units, wherein, described SWD unit is used for one-chip computer module
Download and on-line debugging；
It is whole that described pulse shaping unit is used for the electric pulse to described error sensing module, described standard scale and described standard time clock
Shape；
Described temperature detecting unit carries out overtemperature alarm for detecting system temperature and temperature time too high, it is to avoid temperature is too high to be caused
Described error sensing module burns out；
Described RS485 unit is for the communication of described error sensing module with described SOC electric energy metering module；
Described CAN unit is used for and described one-chip computer module and the communication of management MCU, reception from described one-chip computer module or
The order of management MCU, returns test data to described one-chip computer module or management MCU；
The warning under abnormal conditions of the described acousto-optic warning unit；
Described wireless transmit/receive units is used for being wirelessly transferred detection data, it is possible to very easily the related data of electric energy meter is passed through nothing
Line is transferred to main frame or Intelligent sliding moved end, it is simple to check in time；
The present invention uses three error sensing module of time switch control module co-controlling, and three error sensing module are examined respectively
Survey the umber of pulse of ABC phase SOC electric energy metering module and clock pulses number, and with the clock of the umber of pulse of standard scale with standard time clock
Umber of pulse compares, thus calculates error in dipping and the clock frequency of ABC phase SOC electric energy metering module；A by three-phase independence
Phase SOC electric energy metering module, B phase SOC electric energy metering module and C phase SOC electric energy metering module gather A phase, B phase and C phase respectively
Current/voltage analogue signal and convert thereof into corresponding digital signal, timesharing independent by high-speed isolated communication module passes
It is defeated by data management MCU, is carried out Correlation method for data processing by data management MCU, had idle pulse to export, then pass through high speed SPI
Road " in real time " be transferred to logic card management MCU, by logic card management MCU complete display, data storage, communication, function selecting with
And the work such as parametric data setting；Described display unit is provided with translucent cover, and this transparent casing is provided with transparent antifog oxidant layer,
Transparent casing is provided with transparent antifog oxidant layer, and antifog oxidant layer is removable and prevents steam condensation on transparent casing, reduces
The generation of fog, keeps sight line clear, should be widely promoted and apply；Described SOC electric energy metering module is provided with three-proofing coating layer,
Three-proofing coating layer has good high and low temperature resistance, becomes layer of transparent protecting film after its solidification, have superior insulation, protection against the tide,
The performances such as anticreep, shockproof, dust-proof, anticorrosion, anti-aging, Inverter fed motor, can protect electronic circuit board and thereon relevant set
Standby block is from the erosion in bad border.The present invention can not only prevent the impact of external magnetic field, and timing can carry out electric energy meter
Error-detecting, substantially increases the accuracy of electric energy meter.
Embodiment 2
As shown in Fig. 3, Fig. 2, it is with the difference of embodiment 1: described A phase voltage current collection circuit, described B phase voltage electricity
Stream Acquisition Circuit, described C phase voltage current collection circuit, described data management MCU, described logic card management MCU and described fixed
Time switch control module be all connected with described main power source by identification control module, described identification control module is used for
Prevent unauthorized personnel from arbitrarily operating this electric energy meter, it is therefore prevented that the leakage of the related data of this electric energy meter, only pass through
Identification, described main power source could provide electric energy for this electric energy meter；
Described SOC electric energy metering module uses ADE7878 chip, including gaining merit, the idle and metering of apparent electric energy.Achieve electricity
Pressure, current effective value are measured, power-factor measurement, and Voltage Drop, overvoltage and the quality of power supply such as over-current detection, Phase sequence detection
Measure function；
Described display unit is provided with translucent cover, and this transparent casing is provided with transparent antifog oxidant layer, and antifog oxidant layer is removable and anti-
The condensation on transparent casing of the sealing vapour, reduces the generation of fog, keeps sight line clear, should be widely promoted and apply, described
Antifoggant includes following component by weight: ethanol 5 parts, Ludox 4 parts, octyl group trimethoxy silane 2 parts, methyl trimethoxy
TMOS 2 parts, lauroylamidopropyl betaine 2 parts, secondary octyl phenol polyethenoxy ether 7 parts, isopropanol 16 parts, the positive fourth of metatitanic acid four
Ester 4 parts, alkoxyl ketopyrrolidine 2 parts, tertiary sodium phosphate 1 part, alkanolamide 3 parts, sodium lauryl sulphate 1 part, 30 parts of water, antifog
Tetra-n-butyl titanate in agent can make the surface adhesion of antifoggant coating higher effectively, and alkoxyl ketopyrrolidine can have
Effect ground improves the tension force of coating surface, makes anti-fog performance be strengthened.Can be effectively prevented on glass and droplet occurs, effect effect
Really the time is long；
Described SOC electric energy metering module is provided with three-proofing coating layer, and described three-proofing coating layer includes following component by weight: first
Base ethyl acrylate 15 parts, lauryl acrylate 25 parts, styrene 8 parts, n-butyl acrylate 7 parts, ethyl acetate 40 parts, three uncles
Butylperoxide 1 part, diyl phosphorus tetra-ethyl ester 1 part, emulsifying agent 2 parts, propylene glycol methyl ether acetate 5 parts, liquid paraffin 0.5
Part, C4-C8 hydramine 0.2 part, C10-C18 fatty acid 0.2 part, ethyl acetate 0.2 part, this three-proofing coating layer has good resistance to height
Warm nature energy, becomes layer of transparent protecting film after its solidification, have superior insulation, protection against the tide, anticreep, shockproof, dust-proof, anticorrosion,
The performance such as anti-aging, Inverter fed motor, can protect electronic circuit board and relevant device block thereon from the erosion in bad border.
Finally illustrating, above example is only in order to illustrate technical scheme and unrestricted, and this area is common
Other amendment or equivalents that technical scheme is made by technical staff, without departing from technical solution of the present invention
Spirit and scope, all should contain in the middle of scope of the presently claimed invention.
Claims (6)
1. novel combination type intelligent electric energy meter, it is characterised in that: include voltage x current Acquisition Circuit, SOC electric energy metering module, height
Speed isolation communication module, data management MCU, logic card management MCU and main power source, described voltage x current Acquisition Circuit includes A phase
Voltage x current Acquisition Circuit, B phase voltage current collection circuit and C phase voltage current collection circuit, described SOC electric energy metering module
Including A phase SOC electric energy metering module, B phase SOC electric energy metering module and C phase SOC electric energy metering module, described main power source is institute
State voltage x current Acquisition Circuit, described data management MCU and described logic card management MCU and electric energy is provided；
Described A phase voltage current collection circuit carries out sample of signal metering, described B phase voltage current acquisition to A phase voltage electric current
Circuit carries out sample of signal metering to B phase voltage electric current, and described C phase voltage current collection circuit carries out letter to C phase voltage electric current
Number sampling metering；
Described A phase SOC electric energy metering module, described B phase SOC electric energy metering module and described C phase SOC electric energy metering module and institute
The connection stating high-speed isolated communication module all uses UART mode to connect；
Described high-speed isolated communication module uses UART mode to be connected with described data management MCU；
Described data management MCU uses SPI mode to be connected with described logic card management MCU；
Described logic card management MCU be connected to memory element, display unit, auxiliary terminal, pushbutton unit, communication interface and
Ground connection real-time clock；
Also include three error sensing module, respectively A phase error sensing module, B phase error sensing module and C phase error-detecting
Module and its be respectively used to described A phase SOC electric energy metering module, described B phase SOC electric energy metering module and described C phase SOC electricity
Pulse and clock pulses detection can be carried out by metering module；
Described A phase error sensing module, described B phase error sensing module and described C phase error sensing module are respectively by timing
Switch control module is connected with described main power source, described time switch control module be used for controlling described A phase error sensing module,
Described B phase error sensing module and the duty of described C phase error sensing module；
Described A phase error sensing module, described B phase error sensing module and described C phase error sensing module are respectively connected with standard
Table and standard time clock, be used for providing standard scale umber of pulse and standard time clock umber of pulse, by comparing ABC phase SOC electric energy metrical mould
The umber of pulse of block and standard scale umber of pulse, the error in dipping that ABC phase SOC electric energy metering module can be calculated the metering that will calculate
Error sends high-speed isolated communication module to, by comparing clock pulses number and the standard time clock of ABC phase SOC electric energy metering module
Umber of pulse, can calculate the clock frequency of ABC phase SOC electric energy metering module and send the clock frequency calculated to high-speed isolated
Communication module.
Novel combination type intelligent electric energy meter the most according to claim 1, it is characterised in that: described A phase voltage current acquisition
Circuit, described B phase voltage current collection circuit, described C phase voltage current collection circuit, described data management MCU, described logic
Board management MCU and described time switch control module are all connected with described main power source by identification control module.
Novel combination type intelligent electric energy meter the most according to claim 1 and 2, it is characterised in that: described error sensing module
Including one-chip computer module, SWD download unit, pulse shaping unit, temperature detecting unit, RS485 unit, CAN unit, acousto-optic report
Alert unit and wireless transmit/receive units, wherein, described SWD unit is used for downloading and on-line debugging to one-chip computer module；Institute
State pulse shaping unit for the electric pulse shaping to described error sensing module, described standard scale and described standard time clock；Institute
State temperature detecting unit and carry out overtemperature alarm when detecting system temperature and temperature are too high；Described RS485 unit is for described
Error sensing module and the communication of described SOC electric energy metering module；Described CAN unit is used for and described one-chip computer module and management
The communication of MCU, receives from described one-chip computer module or the order of management MCU, to described one-chip computer module or management MCU
Return test data；The warning under abnormal conditions of the described acousto-optic warning unit；Described wireless transmit/receive units is used for wireless biography
Defeated detection data.
Novel combination type intelligent electric energy meter the most according to claim 1 and 2, it is characterised in that: described SOC electric energy metrical mould
Block uses ADE7878 chip.
Novel combination type intelligent electric energy meter the most according to claim 1 and 2, it is characterised in that: described display unit is provided with
Translucent cover, this transparent casing is provided with transparent antifog oxidant layer.
Novel combination type intelligent electric energy meter the most according to claim 1 and 2, it is characterised in that: described SOC electric energy metrical mould
Block is provided with three-proofing coating layer.
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| CN106504502A (en) * | 2016-12-06 | 2017-03-15 | 国网山东省电力公司鄄城县供电公司 | The method of intelligent electric meter, intelligent electric meter management system and centralized automatic meter-reading |
| CN112994964A (en) * | 2019-12-16 | 2021-06-18 | 浙江正泰仪器仪表有限责任公司 | Intelligent electric meter double-core communication simulation system |
| CN112994964B (en) * | 2019-12-16 | 2023-11-14 | 浙江正泰仪器仪表有限责任公司 | Communication simulation system between two cores of intelligent ammeter |
| CN114325551A (en) * | 2021-11-23 | 2022-04-12 | 云南电网有限责任公司 | Calibration error calculator for multi-path error synchronous test electric energy meter |
| CN114325551B (en) * | 2021-11-23 | 2023-10-17 | 云南电网有限责任公司 | Multipath error synchronous test electric energy meter verification error calculator |
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Application publication date: 20161109 |