CN109030935A - A kind of three-phase and four-line intelligent meter of independent measurement neutral line current - Google Patents
A kind of three-phase and four-line intelligent meter of independent measurement neutral line current Download PDFInfo
- Publication number
- CN109030935A CN109030935A CN201810906866.7A CN201810906866A CN109030935A CN 109030935 A CN109030935 A CN 109030935A CN 201810906866 A CN201810906866 A CN 201810906866A CN 109030935 A CN109030935 A CN 109030935A
- Authority
- CN
- China
- Prior art keywords
- module
- phase
- current
- input terminal
- meter
- 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.)
- Pending
Links
Classifications
-
- 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
- G01R22/061—Details of electronic electricity meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- 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
- G01R22/061—Details of electronic electricity meters
- G01R22/066—Arrangements for avoiding or indicating fraudulent use
-
- 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
- G01R22/061—Details of electronic electricity meters
- G01R22/068—Arrangements for indicating or signaling faults
Abstract
The invention discloses a kind of three-phase and four-line intelligent meters of independent measurement neutral line current, including current sampling module, voltage sampling module, metering chip, CPU, RS485 interface module, LCD display module, telemechanical output module, infrared transmission module, infrared receiving module, data to keep battery, infrared controller, power supply, power management module and meter reading battery.The present invention selects the metering chip of 3 road voltage of band, 4 tunnel current measurements by the hardware configuration of improvement three-phase and four-line intelligent meter, increases zero curve sampling circuit, realizes that neutral line current independently measures；Various short circuit (shunting) situations can be found by the analysis strategy of development；The real-time monitoring for situations such as present invention can monitor resident's three-phase user in current loop stealing, while can detect electric leakage, and various exceptions are converted to event, be reported to main website by power information acquisition system, realize to resident's three-phase user's stealing.
Description
Technical field
The present invention relates to electric discharge device correlative technology field, in particular to a kind of three-phase and four-line of independent measurement neutral line current
Intelligent meter.
Background technique
Current three-phase and four-line intelligent meter measures respectively using the metering chip of three road voltages of measurement, three road electric currents
Three-phase phase voltage and phase current do not measure neutral line current, meter internal structure such as Fig. 1, wiring such as Fig. 2.
Metering chip measures ABC three-phase voltage, electric current, phase angle, and carries out the calculating such as power and electric energy, and CPU is to three-phase electricity
Stream carries out vector and adds to obtain Zero-phase current, while being stored to other measured values, show, analyze, and metering is judged whether there is
It is abnormal.
The intelligent meter of this structure can only monitor decompression at anti-electricity-theft aspect, that is, certain mutually has the feelings of electric current no-voltage
Condition only judge four kinds of overcurrent, defluidization, current imbalance, electric current negative phase sequence situations for electric current, can be used to anti-electricity-theft only have
Two kinds of defluidization, current imbalance events, but for household, because separate, unlatching the time of consumer electronics access is not
It determines, has a large amount of defluidization or current imbalance event generates, belong to normal electricity consumption.And in actual operation, many stealings
Case be all carried out in current loop, such as: meter terminal is shorted certain phase current, meter uncaps and is shorted certain phase current, certain phase
It registers one's residence around meter, certain current phasor measurement loop fault etc., can also generate defluidization or current imbalance event, either way produce
Raw same event, cannot be distinguished.
It is therefore proposed that a kind of three-phase and four-line intelligent meter of independent measurement neutral line current is necessary to solve the above problems.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of three-phase and four-line intelligent meter of independent measurement neutral line current,
For realizing the automatic monitoring to resident's three-phase user's stealing.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of independently to measure neutral line current
Three-phase and four-line intelligent meter, including current sampling module, voltage sampling module, metering chip, CPU, RS485 interface module, LCD are aobvious
Show that module, telemechanical output module, infrared transmission module, infrared receiving module, data keep battery, infrared controller, power supply, electricity
Source control module and meter reading battery；
The input terminal of the current sampling module is respectively connected to Ia, Ib, Ic and In electric current, the voltage sampling module it is defeated
Enter end and be respectively connected to Ua, Ub, Uc and Un voltage, the output end of the current sampling module and voltage sampling module is electrically connected meter
The input terminal of chip, the input terminal of the output end electrical connection CPU of the metering chip are measured, the CPU distinguishes two-way electrical connection
RS485 interface module, LCD display module, telemechanical output module, infrared transmission module, infrared receiving module and data keep electricity
Pond, the input terminal of the output end electrical connection infrared receiving module of the infrared controller, the input terminal of the power supply are respectively connected to
The output end of UA, UB, UC and UN voltage, the two-way electric connection of power supply management module of power supply, the meter reading battery is electrically connected electricity
The input terminal of source control module.
Preferably, the two-way electrical connection load control module of the RS485 interface module, the output of the infrared transmission module
The input terminal of end electrical connection palm PC.
Preferably, described Ia, Ib and Ic respectively indicate actual phase current, and the In indicates actual neutral line current.
(3) beneficial effect
The present invention provides a kind of three-phase and four-line intelligent meter of independent measurement neutral line current, have it is following the utility model has the advantages that
(1), the present invention selects 3 road voltage of band, 4 tunnel current measurements by the hardware configuration of improvement three-phase and four-line intelligent meter
Metering chip, increase zero curve sampling circuit, realize neutral line current independently measure；It can be found by the analysis strategy of development various
It is shorted (shunting) situation.
(2), the present invention can monitor resident's three-phase user in current loop stealing, comprising: meter terminal be shorted phase current,
Uncap be shorted phase current, phase line register one's residence around meter, current phasor measurement loop fault etc., while electric leakage can be detected, will be various different
The reality for situations such as being often converted to event, being reported to main website by power information acquisition system, realize to resident's three-phase user's stealing
When monitor.
Detailed description of the invention
The three-phase and four-line intelligent meter structure chart that Fig. 1 measures for no neutral line current.
The three-phase and four-line intelligent meter wiring diagram that Fig. 2 measures for no neutral line current.
Fig. 3 is the three-phase and four-line intelligent meter structure chart measured with neutral line current.
Fig. 4 is the three-phase and four-line intelligent meter wiring diagram measured with neutral line current.
Fig. 5 is that three-phase and four-line electric energy meter A phase current is shorted wiring diagram.
Fig. 6 is three-phase and four-line electric energy meter AB phase current shortening contact figure.
Fig. 7 is three-phase and four-line electric energy meter ABC phase current shortening contact figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of three-phase and four-line intelligent meters of independent measurement neutral line current as shown in figs. 1-7, including electricity
Flow sampling module, voltage sampling module, metering chip, CPU, RS485 interface module, LCD display module, telemechanical output module,
Infrared transmission module, infrared receiving module, data keep battery, infrared controller, power supply, power management module and meter reading electricity
Pond；
The input terminal of current sampling module is respectively connected to Ia, Ib, Ic and In electric current, the input terminal difference of voltage sampling module
The output end of access Ua, Ub, Uc and Un voltage, current sampling module and voltage sampling module is electrically connected the input of metering chip
End, the input terminal of the output end electrical connection CPU of metering chip, CPU distinguishes two-way electrical connection RS485 interface module, LCD shows mould
Block, telemechanical output module, infrared transmission module, infrared receiving module and data keep battery, the output end electricity of infrared controller
The input terminal of infrared receiving module is connected, the input terminal of power supply is respectively connected to UA, UB, UC and UN voltage, the two-way electrical connection of power supply
Power management module, the input terminal of the output end electric connection of power supply management module of meter reading battery；RS485 interface module is two-way to be electrically connected
Connect load control module, the input terminal of the output end electrical connection palm PC of infrared transmission module；Ia, Ib and Ic respectively indicate reality
The phase current on border, In indicate actual neutral line current.
The present invention increases neutral line current sampling loop, selects suitable metering chip, includes three tunnel voltage measurements, four roads electricity
Flow measurement is respectively used to the measurement of ABC three-phase voltage current and neutral line current, meter internal structure such as Fig. 3, wiring such as Fig. 4.
ABC three-phase voltage current, neutral line current, phase angle, power, electric energy etc. are sent to CPU by metering chip, and CPU is completed
Outside traditional function, increase the association analysis to phase current and neutral line current, judge whether there is stealing, electric leakage etc., analyzes plan
It is slightly as follows:
Ia, Ib, Ic and In respectively indicate actual phase current and neutral line current；
Ia ', Ib ' and Ic ' are the phase current of meter measurement；
In '=Ia '+Ib '+Ic ' is the vector sum for the ABC three-phase current that meter calculates.
Embodiment one:
One phase is shorted in meter terminal
If A phase is shorted in meter terminal, wiring such as Fig. 5, A phase is split into table electric current
Then: Ia ' < Ia, Ib '=Ib, Ic '=Ic
In '=Ia '+Ib+Ic
In=Ia+Ib+Ic
In′≠In
B phase or C phase are shorted that be shorted situation with A phase consistent；
It is consistent in meter terminal short circuit situation with a phase that one phase is shorted inside meter, a phase is registered one's residence around meter.
Embodiment two:
Two-phase is shorted in meter terminal
If AB phase is shorted in meter terminal, wiring such as Fig. 6, AB phase is split into table electric current.
Then: Ia ' < Ia, Ib ' < Ib, Ic '=Ic
In '=Ia '+Ib '+Ic
In=Ia+Ib+Ic
In′≠In
Other any two-phases are shorted that be shorted situation with AB phase consistent；
It is consistent in meter terminal short circuit situation with two-phase that two-phase is shorted in table, two-phase is registered one's residence around meter.
Embodiment three:
Three-phase is shorted in meter terminal
Wiring such as Fig. 7, ABC three-phase current are split.
Then: Ia ' < Ia, Ib ' < Ib, Ic ' < Ic
In '=Ia '+Ib '+Ic '
In=Ia+Ib+Ic
In′≠In
It is consistent in meter terminal short circuit situation with three-phase that three-phase is shorted in table, three-phase is registered one's residence around meter.
Meter terminal is shorted, meter is uncapped is shorted in table, phase line is registered one's residence around meter and several ways while being used, meter
The result of detection is consistent.
Above-mentioned three kinds of situations assume that actual current is all returned from zero curve after electrical appliance, can if user has electric leakage
There is part phase current, not back to zero curve, to also result in In ' ≠ In after electrical appliance, guidance can be provided to user security electricity consumption.
In view of the error for measuring with calculating, in the case where normal electricity consumption, it is also possible to In ' ≠ In occur, to avoid missing
Sentence, certain threshold values is arranged to the difference of In ' and In, therefore, using | In '-In | > 0.1 replaces In' ≠ In as Rule of judgment,
When the condition is satisfied, the current anomaly event flag of meter is set, active reporting to power information acquires main website.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (3)
1. a kind of three-phase and four-line intelligent meter of independent measurement neutral line current, it is characterised in that: taken including current sampling module, voltage
It is egf block, metering chip, CPU, RS485 interface module, LCD display module, telemechanical output module, infrared transmission module, infrared
Receiving module, data keep battery, infrared controller, power supply, power management module and meter reading battery；
The input terminal of the current sampling module is respectively connected to Ia, Ib, Ic and In electric current, the input terminal of the voltage sampling module
It is respectively connected to Ua, Ub, Uc and Un voltage, the output end of the current sampling module and voltage sampling module is electrically connected metering core
The input terminal of piece, the input terminal of the output end electrical connection CPU of the metering chip, two-way electrical connection RS485 connects the CPU respectively
Mouth mold block, LCD display module, telemechanical output module, infrared transmission module, infrared receiving module and data keep battery, described
The input terminal of the output end electrical connection infrared receiving module of infrared controller, the input terminal of the power supply are respectively connected to UA, UB, UC
Mould is managed with the output end electric connection of power supply of UN voltage, the two-way electric connection of power supply management module of power supply, the meter reading battery
The input terminal of block.
2. a kind of three-phase and four-line intelligent meter of independent measurement neutral line current according to claim 1, it is characterised in that: described
The two-way electrical connection load control module of RS485 interface module, the output end electrical connection palm PC of the infrared transmission module
Input terminal.
3. a kind of three-phase and four-line intelligent meter of independent measurement neutral line current according to claim 1, it is characterised in that: described
Ia, Ib and Ic respectively indicate actual phase current, and the In indicates actual neutral line current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906866.7A CN109030935A (en) | 2018-08-10 | 2018-08-10 | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906866.7A CN109030935A (en) | 2018-08-10 | 2018-08-10 | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109030935A true CN109030935A (en) | 2018-12-18 |
Family
ID=64633430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810906866.7A Pending CN109030935A (en) | 2018-08-10 | 2018-08-10 | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109030935A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777532A (en) * | 2021-11-10 | 2021-12-10 | 武汉中电国为技术有限公司 | System, method and device for recognizing zero-line and phase-loss of power secondary equipment side |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2821728Y (en) * | 2005-02-28 | 2006-09-27 | 成都华立达电力信息系统有限公司 | Far transmission multifunction electric meter |
| CN101413982A (en) * | 2007-10-18 | 2009-04-22 | 深圳长城开发科技股份有限公司 | Method and apparatus for detecting short circuit of current loop |
| CN201247276Y (en) * | 2008-06-16 | 2009-05-27 | 王立军 | Intelligent power utilization metering monitoring instrument |
| CN101498758A (en) * | 2008-02-03 | 2009-08-05 | 深圳长城开发科技股份有限公司 | Detection method and apparatus for short circuit of current loop |
| CN101907646A (en) * | 2009-06-02 | 2010-12-08 | 郑五星 | Wireless long-distance digital alarm meter reading terminal and system for monitoring metering fault by null-balance method |
| CN202110234U (en) * | 2011-05-20 | 2012-01-11 | 深圳市锐能微科技有限公司 | Detection device for three-phase voltage system and chip |
| CN202794330U (en) * | 2012-09-10 | 2013-03-13 | 浙江晨泰科技股份有限公司 | Three-phase four-wire charge intelligent electric energy meter |
| CN202948040U (en) * | 2012-08-23 | 2013-05-22 | 王金泽 | Intelligent electric energy meter having power failure monitoring and protection functions |
| CN103149428A (en) * | 2011-12-07 | 2013-06-12 | 江苏盛德电子仪表有限公司 | Three-phrase four-wire multifunctional watt-hour meter |
| CN204287317U (en) * | 2014-12-09 | 2015-04-22 | 潍坊五洲浩特电气有限公司 | A kind of three-phase intelligent ammeter with detection of electrical leakage |
| CN204631125U (en) * | 2015-03-25 | 2015-09-09 | 福州富芯电子有限公司 | A kind of three-phase LCD Multi-functional digital display electrical measuring meter |
| CN105911344A (en) * | 2016-04-26 | 2016-08-31 | 宁波三星智能电气有限公司 | Intelligent electric energy meter supporting electric leakage protection |
| CN106645930A (en) * | 2016-11-23 | 2017-05-10 | 浙江恩鸿电子有限公司 | Three-phase four-wire electric energy metering device having null line missing detection function |
| CN107328969A (en) * | 2014-11-05 | 2017-11-07 | 江苏省电力公司常州供电公司 | A kind of electric energy meter of measurable residual current |
| CN206725652U (en) * | 2017-04-27 | 2017-12-08 | 国网重庆市电力公司电力科学研究院 | A kind of forward and reverse power synchronous metering electric energy meters of single-phase 220V |
| CN107478881A (en) * | 2017-08-16 | 2017-12-15 | 深圳市思达仪表有限公司 | Three-phase electric energy meter by-pass current detection method and its system |
-
2018
- 2018-08-10 CN CN201810906866.7A patent/CN109030935A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2821728Y (en) * | 2005-02-28 | 2006-09-27 | 成都华立达电力信息系统有限公司 | Far transmission multifunction electric meter |
| CN101413982A (en) * | 2007-10-18 | 2009-04-22 | 深圳长城开发科技股份有限公司 | Method and apparatus for detecting short circuit of current loop |
| CN101498758A (en) * | 2008-02-03 | 2009-08-05 | 深圳长城开发科技股份有限公司 | Detection method and apparatus for short circuit of current loop |
| CN201247276Y (en) * | 2008-06-16 | 2009-05-27 | 王立军 | Intelligent power utilization metering monitoring instrument |
| CN101907646A (en) * | 2009-06-02 | 2010-12-08 | 郑五星 | Wireless long-distance digital alarm meter reading terminal and system for monitoring metering fault by null-balance method |
| CN202110234U (en) * | 2011-05-20 | 2012-01-11 | 深圳市锐能微科技有限公司 | Detection device for three-phase voltage system and chip |
| CN103149428A (en) * | 2011-12-07 | 2013-06-12 | 江苏盛德电子仪表有限公司 | Three-phrase four-wire multifunctional watt-hour meter |
| CN202948040U (en) * | 2012-08-23 | 2013-05-22 | 王金泽 | Intelligent electric energy meter having power failure monitoring and protection functions |
| CN202794330U (en) * | 2012-09-10 | 2013-03-13 | 浙江晨泰科技股份有限公司 | Three-phase four-wire charge intelligent electric energy meter |
| CN107328969A (en) * | 2014-11-05 | 2017-11-07 | 江苏省电力公司常州供电公司 | A kind of electric energy meter of measurable residual current |
| CN204287317U (en) * | 2014-12-09 | 2015-04-22 | 潍坊五洲浩特电气有限公司 | A kind of three-phase intelligent ammeter with detection of electrical leakage |
| CN204631125U (en) * | 2015-03-25 | 2015-09-09 | 福州富芯电子有限公司 | A kind of three-phase LCD Multi-functional digital display electrical measuring meter |
| CN105911344A (en) * | 2016-04-26 | 2016-08-31 | 宁波三星智能电气有限公司 | Intelligent electric energy meter supporting electric leakage protection |
| CN106645930A (en) * | 2016-11-23 | 2017-05-10 | 浙江恩鸿电子有限公司 | Three-phase four-wire electric energy metering device having null line missing detection function |
| CN206725652U (en) * | 2017-04-27 | 2017-12-08 | 国网重庆市电力公司电力科学研究院 | A kind of forward and reverse power synchronous metering electric energy meters of single-phase 220V |
| CN107478881A (en) * | 2017-08-16 | 2017-12-15 | 深圳市思达仪表有限公司 | Three-phase electric energy meter by-pass current detection method and its system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777532A (en) * | 2021-11-10 | 2021-12-10 | 武汉中电国为技术有限公司 | System, method and device for recognizing zero-line and phase-loss of power secondary equipment side |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106569164B (en) | A kind of synchronous detecting method and system of twin-core electric energy meter electricity | |
| CN209215480U (en) | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current | |
| CN109270316A (en) | A kind of power consumer electricity consumption abnormality recognition method, device and terminal device | |
| CN109142993A (en) | A kind of multifunction insulating detector suitable for DC power system | |
| CN206505124U (en) | Intellectual monitoring ammeter | |
| CN202230155U (en) | Three-phase digital intelligent electric energy quality detection device | |
| CN109030935A (en) | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current | |
| CN202196118U (en) | Stepped billing electric energy meter | |
| CN103293374A (en) | Three-phase access type electric energy meter with electronic transformers and metering method for three phase access type electric energy meter | |
| CN203433041U (en) | An electric energy meter provided with a communication function | |
| CN205120822U (en) | Intelligent anti -electricity -theft system of high pressure | |
| CN204391901U (en) | A kind of low-voltage circuit breaker intelligent controller based on CAN | |
| CN201917627U (en) | Portable direct-current grounding fault searching instrument | |
| CN102353859A (en) | Multi-path multifunctional power communication detection equipment and detection method for same | |
| CN211554130U (en) | Intelligent safety power consumption monitoring device based on NB-IOT | |
| CN206339641U (en) | A kind of low-temperature measurement in-situs tester | |
| CN202141768U (en) | Multichannel multifunctional electric power communication detecting device | |
| CN204855612U (en) | Thief -proof electric leakage device of power supply line | |
| CN206992687U (en) | A kind of electrical management device based on power line communication technology | |
| CN206892294U (en) | BMS measuring and analysing meters | |
| Xiong et al. | Design of the intelligent detection instrument used in user electricity lines missort fault | |
| CN205404676U (en) | Electricity inspection terminal of special electric energy measurement of three -phase | |
| CN102478613A (en) | Portable direct-current earth fault finder | |
| CN203798904U (en) | Isolated single-phase energy consumption measurement and control circuit | |
| CN109061525A (en) | L ED driving power supply performance test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |