CN105911420B - The method of 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination - Google Patents
The method of 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination Download PDFInfo
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- CN105911420B CN105911420B CN201610371270.2A CN201610371270A CN105911420B CN 105911420 B CN105911420 B CN 105911420B CN 201610371270 A CN201610371270 A CN 201610371270A CN 105911420 B CN105911420 B CN 105911420B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to a kind of methods of 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination, if the voltage of electric energy meter input intelligence instrumentFor For ForFour phase differences are measured by intelligence instrument：LagPhase differenceLagPhaseLagPhase differenceWithLagPhase differenceFour phase differences are input to the judging unit in intelligence instrument, the voltage link of the three-phase three-wire electric energy meter is differentiated by judging unit；It obtains under each voltage linkLagPhase differenceAndLagPhase differenceAnd by each voltage link and correspondingWithIt stores into intelligence instrument, is judged by judging unit in table formLagPhase difference, obtainLagOut of phase difference under the electric energy meter current wiring；And then obtain the voltage and current mode of connection of the three-phase three-wire electric energy meter.The beneficial effects of the present invention are：Measurement parameter is few, proposes to measure voltageLagPhase differenceDifferentiation is set to have walked shortcut, identification effect is high, is suitble to promote the use of.
Description
Technical field
The present invention relates to 192 kinds of three-phase three-wire electric energy meter wiring sides of technical field of electrical measurement more particularly to automatic discrimination
The method of formula.
Background technology
10kV high-voltage electric-energy meters include voltage transformer TV, current transformer TA, electric energy meter and secondary line.Electricity
The polarity of the wiring correctness and TV, TA of energy table, the trend of secondary line are related.In China's power distribution network, large-scale user has
Work(electrical energy measurement takes the mode of connection as shown in Figure 1, and two TV, two TA need to be coupled simultaneously.The mode of connection
It is denoted as：Show the voltage and electric current phasor that are matched in one group of driving element in each line symbol.Electric energy
Table voltage input end 2,4,6 is connect respectively to TV bis- output ends a, b, c, wherein 4 terminate to earth point b, it is ground potential.Electric energy meter
Current input terminal is 1,3,5,7,It is flowed into from 1 end, flows out, make from 3 ends It is flowed into from 5 ends, flows out, make from 7 ends In advanceIn advanceFor positive phase sequence.
As shown in figure 4, bis- Same Name of Ends of TV have 4 kinds of wiring；Intersecting during tri- line bracing wires of secondary a, b, c has 6 kinds of feelings
Condition；TA has 8 kinds of wiring bis- times；As a result 4 × 6 × 8=192 kind wiring developed out.If considering further that inductive load is negative with capacitive
The phasor diagram of load is different, then can draw 384 kinds of phasor diagrams.
Each can therefrom find the another kind of the complete reverse phase of phasor diagram therewith for this 192 kinds of wiring, the counted power of the two, more
Positive coefficient, phase sequence all same, TV, TA external secondary connection and trend are also identical, uniquely the difference is that the pole of TV, TA secondary coil
Property completely on the contrary, as listed in table 1 shown in Figure 12, Figure 13.In work on the spot it can be assumed that be same wiring, so 192 kinds
Wiring can fall to 96 kinds.When lower surface analysis, bis- Same Name of Ends of TV only enumerate TV I, TV II it is complete just with TV I just, the anti-feelings of TV II
Condition, wiring type fall to 96 kinds.
The wiring citing of all signal inversions in 1 every group of combination of table (the two belongs to same)
Such as the 4th group of left wiring in table 1With right wiringBelong to same
Kind mode of connection.
Patent related with phase three-wire three active energy metering device false wiring is differentiated has with equipment at present：
(1) a kind of three-phase three-wire electric energy meter false wiring judgment method, the patent No.：201310449397.This is 2007
The method for the artificial judgment phase three-wire three active electric energy meter false wiring that " State Grid Corporation of China's metrological personnel transfers contest " uses.
Its method is：First use phase difference and Current Voltage between phase-sequence meter, volt-ampere phase meter scene manual measurement voltage phase sequence, each phasor big
Small, after recording data, artificial phasor diagram analysis of drawing differentiates that the mode of connection is any.Because power load is divided into capacitive load
And inductive load, the phasor diagram drawn out have 384 kinds of possibilities.Although the accuracy of artificial judgment is high, operating personnel are required
Theory is strong, technology is good, awareness of safety is high, and difficulty is larger, is not easy to popularize.In addition, this judgment method speed is slower, it is only applicable to
Theory examination, technology tourney are not suitable for live practical measurement, are not suitable with the requirement of intelligent grid yet.
(2) a kind of method quick and precisely judging metering device false wiring, the patent No.：CN201410616050.2.This
Item patent needs manually to measure six phase angle differences on phase three-wire three two element metering device respectively using phase voltammetric meter；So
The relationship of manual analysis phase three-wire three two element metering device current phase angle afterwards, determines that electric current is separate, then analysis voltage phase angle
Relationship, determines voltage phase sequence, then analysis voltage and current angle relation, determines that voltage is separate using across phase method, ultimate analysis electricity
Pressure, current angle relation, determine current direction.This measurement method process is cumbersome, and surveyed parameter is too many, with patent
201310449397 is similar, is all artificial non intelligent non-automatic differentiation.
(3) a kind of judgment method of misconnection of three-phase three-wire electric energy meter, the patent No.：CN201210533436.8.This
Patent need to be judged that present rotating disc type electric energy meter seldom makes according to the steering of three-phase power electric energy meter and reactive energy-meter
With differentiating that it is live practical that mistake is not met by turntable.And it is also required to manually carry out vector analysis, obtain actual active
The calculation expression of power and reactive power, and then learn the influence of metering error.
(4) a kind of three-phase electric energy meter on-site detection device and detection method, the patent No.：201510197874.5.The patent
For power department to newly purchasing, new clothes and field electric energy table carry out comprehensive error-detecting, structural principle is more complex.Use three
Phase full electronic programmable power supply, measurement module and control computer.Tested electric energy meter is detected on meter hanging frame, three
The output of phase full electronic programmable power supply will also be added on live load, not exclusively be the application under practical environment.
(5) electric energy meter online test method, the patent No.：201110165040.8.This invention is suitable for field-checking, determines
Inspection and incident table verifying work.The wiring of tested electric energy meter is identical with the wiring of standard electric energy meter, the former is wiring mistake the latter
And then wrong, it is the only error of checklist itself in the case where ignoring the mode of connection, rather than the entire electric energy metering device of inspection
Wiring.
(6) equipment that power department is commonly used to detection electric energy meter during the nearly last ten years also has " three-phase electric energy meter on-site verification
Instrument ", function is more, and the parameter of measurement is more, and display content is more and beautiful, and cost is just high.But relatively simple 48 can only be determined
Kind wiring error is that most the first from left arranges the first (TV Same Name of Ends TV I, TV II are complete just) and intermediate 6 kinds of voltage secondary lines and the right side in Fig. 4
Combined 48 kinds of 8 kinds of side electric current secondary line.The major function of this tester is to verify the measurement accuracy of electric energy meter, without
It is to differentiate wiring error, it is reversed to TV secondary polarities correctly to judge.
Invention content
The purpose of the present invention is being directed to the above shortcoming, a kind of 192 kinds of three-phase three-wire electric energy meters of automatic discrimination are provided
The method of the mode of connection realizes that the automatic discrimination mode of connection, identification effect are high.
Scheme is used by the present invention solves technical problem：A kind of 192 kinds of three-phase three-wire electric energy meter wiring of automatic discrimination
The method of mode, includes the following steps：
Step S0：By two voltage transformer TV, two current transformer TA respectively through secondary circuit line and electric energy meter
It is connected with three-phase three-wire system, as shown in Figure 1, this is the correct wiring figure of three-phase three-wire electric energy meter；Fig. 2 is then phase three-wire three
The correct phasor diagram of electric energy meter.
Step S1：By one for differentiating that the intelligence instrument of the three-phase three-wire electric energy meter mode of connection is connected with the inlet wire of electric energy meter
It connects.The intelligence instrument include four voltage terminals, wherein three terminals by electric energy meter field terminal box (such as Fig. 3 institutes
Show) it is connect respectively with the first voltage input terminal of electric energy meter, second voltage input terminal and tertiary voltage input terminal, another connects
Line end is connect with the ground terminal of voltage transformer TV；The two-way inlet wire current of electric energy meterRespectively after decaying with Intelligent Instrument
Table is connected；The voltage of wherein first voltage input terminal to second voltage input terminal isTertiary voltage input terminal is to second voltage
The voltage of input terminal isThe voltage of second voltage input terminal to the ground terminal of voltage transformer TV isIntelligence instrument with
Connection type between electric energy meter is as shown in figure 19.
Step S2：Set the voltage of electric energy meter input intelligence instrumentForForForPass through intelligence
It can four phase differences of instrument measurement：LagPhase differenceLagPhaseLag's
Phase differenceWithLagPhase difference
Step S3：Four phase differences in step S2 are input to the judging unit in intelligence instrument.Pass through judging unit elder generation
Differentiate the voltage link mode of the three-phase three-wire electric energy meter, as shown in Figure 5, Figure 6；
Step S4:Derivation can be obtained in step S3 under each voltage linkLagPhase differenceAndLagPhase differenceAnd by each voltage link and correspondingWithIt stores in table form into intelligence instrument,
InWithFor the phase voltage of power supply system；
Step S5：Judged by judging unitLagPhase difference, obtainLagOut of phase difference under should
The electric current wiring of electric energy meter, it is possible that there are two types of at this moment electric current wiring, still needs to further judge；LagPhase be 240 ° and
At 60 ° or so,It is connected toMay beMay also beAt this moment it calculates LagPhase be 120 ° and
At 300 ° or so,It is connected toMay beMay also beAt this moment it calculatesIt can differentiate phase three-wire three electricity
The electric current mode of connection of energy table, as shown in Fig. 7, Fig. 8, Fig. 9, Figure 10；The mode of connection of combination voltage and electric current, and then be somebody's turn to do
The mode of connection of three-phase three-wire electric energy meter.
Further, in step s3, differentiate that the voltage link of the three-phase three-wire electric energy meter includes the following steps：
Step S31：Three pressure-wires of secondary circuit of the voltage transformer TV are a, b and c, wherein a, b and c and electric energy
The voltage input end of table arbitrarily connects；
Step S32:The two Same Name of Ends TV I and TV II for setting voltage transformer TV are when just connecing, to obtain at this timeIt is stagnant
AfterwardsPhaseThe case where, as shown in 6 kinds before Fig. 5：
(1)At this timeIn advanceFor positive phase sequence,
ThenThe ground terminal of the second voltage input terminal of electric energy meter and voltage transformer connects at this time, obtains electric at this time
Can the voltage link of table be
OrI.e.The voltage link of electric energy meter is at this time
OrI.e.The voltage link of electric energy meter is at this time
(2)At this timeIn advanceFor negative phase sequence,
ThenObtaining electrical energy meter electricity compression bonded line is
OrThat is,Obtaining electrical energy meter electricity compression bonded line at this time is
OrThat is,Obtaining electrical energy meter electricity compression bonded line at this time is
Step S33：Two Same Name of Ends TV I of setting voltage transformer TV are just to connect, and when TV II is reversal connection, obtain this
WhenLagPhaseThe case where, as shown in 6 kinds after Fig. 5：
(1)At this timeObtaining electrical energy meter electricity compression bonded line at this time is
(2)At this timeObtaining electrical energy meter electricity compression bonded line at this time is
(3)ThenObtaining electrical energy meter electricity compression bonded line at this time isOtherwiseObtaining electrical energy meter electricity compression bonded line at this time is
(4)ThenObtaining electrical energy meter electricity compression bonded line at this time isOtherwiseObtaining electrical energy meter electricity compression bonded line at this time is
Further, in step S33, the intelligence instrument is also powered with an indicator light, mutual for light prompting voltage
Sensor TV whether there is single reversal connection.
Further, in the step S5, the judgement of the electric current mode of connection specifically includes following steps：
Step S51：It first determines whetherLagPhase difference
Step S52：IfThenGo to step S53；OtherwiseGo to step S53；
Step S53:JudgeIf so, the electric current wiring for obtaining electric energy meter isOrGo to step S530；Otherwise, step S54 is gone to；
Step S530：In invocation step S4And in conjunction withIf judgingThenOtherwise
Step S54：If judgingThe electric current wiring for then obtaining electric energy meter isOrGo to step S540；Otherwise, step S55 is gone to；
Step S540：In invocation step S4And in conjunction withIf judgingThenOtherwise
Step S55：If judgingThe electric current wiring for then obtaining electric energy meter is：OrGo to step S550；Otherwise step S56 is gone to；
Step S550：In invocation step S4And in conjunction withIf judgingThen,Otherwise
Step S56：If judgingThe electric current wiring for then obtaining electric energy meter is：OrGo to step S560.
Step S560：In invocation step S4And in conjunction withIf judgingThenOtherwise
Further, the electric energy meter includes four current terminals, respectively the first current terminal, the second current terminal, the
Three current terminals and the 4th current terminal, the inlet wire current of electric energy meterIt flows into through the first current terminal, then is flowed out through the second current terminal；Electricity
The inlet wire current of energy tableIt flows into through third current terminal, then is flowed out through the 4th current terminal.
Further, the intelligence instrument includes a shell and the control module that is placed in shell, the control module
Including the judging unit and the interface circuit that is electrically connected with the judging unit, the judging unit is microcontroller, in step S4
In the wiring of each voltage and correspondingWithIt is stored in table form into the RAM of microcontroller.
Further, the microcontroller is also associated with a display module for showing connection box of electric energy meter mode.
Further, in step s 2, four phase differences of electric energy meter output are successively through signal acquisition module, signal condition
Module is electrically connected with the microcontroller.
Compared with prior art, the present invention has following advantageous effect：The present invention is from electrical voltage system, the respective phase of current system
Potential difference is started with, and is differentiated the wiring type of two systems separately, is derived phase voltageIt is lagged in each voltage link
Phase differenceTo realizeWithBetween phase angle comparison；OrWithBetween phase angle comparison, make
Electrical voltage system, current system set up contact, the mode of connection of quick discrimination electric energy meter.In addition Intelligent Instrument of the present invention
Table, it is at low cost, it is small, it is light-weight, easily carry.
Description of the drawings
Patent of the present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the correct wiring figure of 10kV phase three-wire three active energy metering devices.
Fig. 2 is the correct phase relational graph of 10kV phase three-wire three active energy metering devices.
Fig. 3 is joint wiring of the 10kV three-phase three-wire electric energy meters by field terminal box
Fig. 4 is the mode of connection full figure of 10kV phase three-wire three active energy metering devices.
Fig. 5 be in the present invention voltage transformer TV I, TV II it is complete just with TV I just, II inverse time of TVLagThe whole circumstances.
Fig. 6 is the differentiation flow diagram of voltage connection in the present invention.
Fig. 7 is the differentiation flow diagram of electric current connection in the present invention.
Fig. 8 is to be determined in the present inventionWhether beDiscrimination principles figure.
Fig. 9 is to be determined in the present inventionWhether beDiscrimination principles figure.
Figure 10 is the phasor diagram of the differentiation example one of the present invention.
Figure 11 is the first wiring diagram of the differentiation example one of the present invention.
Figure 12 is the Second Linking Method figure of the differentiation example one of the present invention.
Figure 13 is the phasor diagram of the differentiation example two of the present invention.
Figure 14 is the first wiring diagram of the differentiation example two of the present invention.
Figure 15 is the Second Linking Method figure of the differentiation example two of the present invention.
Figure 16 is the phasor diagram of the differentiation example three of the present invention.
Figure 17 is the first wiring diagram of the differentiation example three of the present invention.
Figure 18 is the Second Linking Method figure of the differentiation example three of the present invention.
Connection type between Figure 19 intelligence instruments and electric energy meter.
Specific implementation mode
The present invention is further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Fig. 1~9, Figure 19, the embodiment of the present invention provides a kind of 192 kinds of three-phase three-wire electric energy meter wiring of automatic discrimination
The method of mode, includes the following steps：
Step S0：By two voltage transformer TV, two current transformer TA respectively through secondary circuit line and electric energy meter
It is connected with three-phase three-wire system, as shown in Figure 1, this is the correct wiring figure of three-phase three-wire electric energy meter, Fig. 2 is corresponding correct
Phasor diagram；
Step S1：By one for differentiating that the intelligence instrument of the three-phase three-wire electric energy meter mode of connection is connected with the inlet wire of electric energy meter
It connects.The intelligence instrument include four voltage terminals, wherein three terminals by electric energy meter field terminal box (such as Fig. 3 institutes
Show) it is connect respectively with the first voltage input terminal of electric energy meter, second voltage input terminal and tertiary voltage input terminal, another connects
Line end is connect with the ground terminal of voltage transformer TV；The two-way inlet wire current of electric energy meterRespectively through subsidiary two of instrument
Current transformer is connected with intelligence instrument, and two subsidiary current transformers of instrument do not cause added phase shift, is only used for decaying electricity
Stream；The voltage of wherein first voltage input terminal to second voltage input terminal isTertiary voltage input terminal to second voltage inputs
The voltage at end isThe voltage of second voltage input terminal to the ground terminal of voltage transformer TV isIntelligence instrument and electric energy
Connection type between table is as shown in figure 19.
Step S2：Set the voltage of electric energy meter input intelligence instrumentForForForPass through intelligence
It can four phase differences of instrument measurement：LagPhase differenceLagPhaseLag's
Phase differenceWithLagPhase difference
Step S3：Four phase differences in step S2 are input to the judging unit in intelligence instrument.Pass through judging unit elder generation
Differentiate the voltage link mode of the three-phase three-wire electric energy meter, as shown in Figure 5, Figure 6；
Step S4:It is derived by step S3 under each voltage linkLagPhase differenceAndLagPhase differenceAnd by each voltage link and correspondingWithIt stores in table form into intelligence instrument,
InWithFor the phase voltage of power supply system；
Step S5：Judged by judging unitLagPhase difference, obtainLagOut of phase difference under should
The electric current wiring of electric energy meter, it is possible that there are two types of at this moment electric current wiring, still needs to further judge；LagPhase be 240 ° and
At 60 ° or so,It is connected toMay beMay also beAt this moment it calculates LagPhase be 120 ° and
At 300 ° or so,It is connected toMay beMay also beAt this moment it calculatesIt can differentiate phase three-wire three electricity
The electric current mode of connection of energy table, as shown in Fig. 7, Fig. 8, Fig. 9, Figure 10；The mode of connection of combination voltage and electric current, and then be somebody's turn to do
The mode of connection of three-phase three-wire electric energy meter.
From the correct phasor diagram of Fig. 2 it is found that when correct wiringIn advance60 ° are positive phase sequence.There are three types of situations can shadow
It ringsWithBetween phase sequence it is positive and negative：1. three one, TV secondary voltages lines are motionless, another two intersections, result is backward (three
When root TV secondary voltage line wheels are changed, phase sequence is constant)；2. there is a phase TV secondary coil Same Name of Ends reversed, result is backward；3. three
One, TV secondary voltages line is motionless, it is another two intersection, and have simultaneously a phase TV secondary coil Same Name of Ends it is reversed when because there are two
Cause voltage phase sequence to become anti-factor to exist, phase sequence is reduced to positive sequence.
Phase in advance with the definition of lag：One phasor claims " the former within 180 ° of the front counterclockwise of another phasor
Advanced the latter ".300 ° are so lagged, is equivalent to advanced 60 °.The first voltage terminals of three-phase three-wire electric energy meter, second voltage
Terminals and tertiary voltage terminals are respectively labeled as 2,4 and 6, the first current terminal, the second current terminal, the third electric current of electric energy meter
End and the 4th current terminal are respectively labeled as 1,3,5 and 7.The ground terminal of voltage transformer is labeled as 0.
As shown in Figure 5, Figure 6, wherein Fig. 6 is the differentiation flow diagram of voltage connection, in the present embodiment, in step S3
In, differentiate that the voltage link of the three-phase three-wire electric energy meter includes the following steps：
Step S31：Three pressure-wires of secondary circuit of the voltage transformer TV are a, b and c, wherein a, b and c and electric energy
The voltage input end of table arbitrarily connects；
Step S32:The two Same Name of Ends TV I and TV II for setting voltage transformer TV are when just connecing, to obtain at this timeIt is stagnant
AfterwardsPhaseThe case where, as shown in 6 kinds before Fig. 5：
(1)At this timeIn advanceFor positive phase sequence, thenAt this time the second voltage input terminal of electric energy meter with
The ground terminal of voltage transformer connects, and the voltage link for obtaining electric energy meter at this time isIt can obtain at this timeOrI.e.The voltage link of electric energy meter is at this time
It can obtain at this timeOrI.e.The voltage link of electric energy meter at this time
ForIt can obtain at this time
(2)At this timeIn advanceFor negative phase sequence, thenObtaining electrical energy meter electricity compression bonded line isIt can obtain at this timeOrThat is,Obtain electric energy
Table voltage link isIt can obtain at this time OrThat is,Obtaining electrical energy meter electricity compression bonded line isIt can obtain at this time
Step S33：Two Same Name of Ends TV I of setting voltage transformer TV are just to connect, and when TV II is reversal connection, obtain this
WhenLagPhaseThe case where, as shown in 6 kinds after Fig. 5：
(1)At this timeObtaining electrical energy meter electricity compression bonded line isIt can obtain at this time
It arrives
(2)At this timeObtaining electrical energy meter electricity compression bonded line isIt can obtain at this time
It arrives
(3)ThenObtaining electrical energy meter electricity compression bonded line isIt can obtain at this timeOtherwiseObtain electric energy
Table voltage link isIt can obtain at this time
(4)ThenObtaining electrical energy meter electricity compression bonded line isIt can obtain at this timeOtherwiseObtain electric energy
Table voltage link isIt can obtain at this time
In the present embodiment, in step S33, the intelligence instrument is also powered with an indicator light, for light prompting electricity
Mutual inductor TV is pressed to whether there is single reversal connection.
It, can will be under the mode of connection after the mode of connection of voltage judgesLagPhaseLagPhaseIt derives, as form document there are in the RAM of microcontroller, is used for the information in conjunction with current system, finally
Differentiate that the electrical energy meter electricity current voltage mode of connection, all phasor correlations should meet the rule of three-phase circuit.
As described in Fig. 7, Fig. 8, Fig. 9, in the present embodiment, in the step S5, the judgement of the electric current mode of connection is specific
Include the following steps：
Step S51：The secondary loop current line of current transformer TA is a and b, is first determined whetherLagPhase difference
Step S52：IfThenGo to step S53；OtherwiseGo to step S53；
Step S53:JudgeIf so, the electric current wiring for obtaining electric energy meter isOrGo to step S530；Otherwise, step S54 is gone to；
Step S530：In invocation step S4And in conjunction withIf judgingThenOtherwise
Step S54：If judgingThe electric current wiring for then obtaining electric energy meter isOrGo to step S540；Otherwise, step S55 is gone to；
Step S540：In invocation step S4And in conjunction withIf judgingThenOtherwise
Step S55：If judgingThe electric current wiring for then obtaining electric energy meter is：OrGo to step S550；Otherwise step S56 is gone to；
Step S550：In invocation step S4And in conjunction withIf judgingThen,Otherwise
Step S56：If judgingThe electric current wiring for then obtaining electric energy meter is：Or
Go to step S560.
Step S560：In invocation step S4And in conjunction withIf judgingThen
Otherwise
Fig. 7 is the differentiation flow diagram of electric current connection, is differentiated firstLagPhase, there are four types of may, each is right
It should be in two kinds of modes of connection.LagPhase be 240 ° and 60 ° when,It is connected toMay beMay also be
For a kind of mode of connection,For another mode of connection.LagPhase be 120 ° and 300 ° when,It is connected toMay beMay also be For a kind of mode of connection,For another mode of connection；As shown in Figure 8.In view of load hinders
Anti- possible non complete symmetry, each differentiates that there are ± 10 ° of phase angle shift ranges.
WhenIt is connected toWhen, if it isSoWithBetween phase angle absolute valueIt should not exceed and be equal to
90°；OtherwiseWhat is connect isBecause the absolute value of the power-factor angle of power consumer is less than 90 °, it is impossible to pure capacitive occur
Or the load of pure perception, also setting user cannot send power, the absolute value of power-factor angle to be not more than 90 ° to power grid is counter.Cause
ThisLagPhase be 120 ° and 300 ° when, workDifferentiation.Principle is as shown in Figure 8.
WhenIt is connected toWhen, if it isSoWithBetween phase angle absolute valueIt should not exceed
In 90 °；OtherwiseWhat is connect isThereforeLagPhase be 240 ° and 60 ° when, workDifferentiation.Principle
As shown in Figure 9.
In the present embodiment, the electric energy meter includes four terminals, respectively the first current terminal, the second current terminal, the
Three current terminals and the 4th current terminal, the inlet wire current of electric energy meterIt flows into through the first current terminal, then is flowed out through the second current terminal；Electricity
The inlet wire current of energy tableIt flows into through third current terminal, then is flowed out through the 4th current terminal.
In the present embodiment, the intelligence instrument includes a shell and the control module that is placed in shell, the control
Module includes the judging unit and the interface circuit that is electrically connected with the judging unit, and the judging unit is microcontroller, in step
The wiring of each voltage and corresponding in rapid S4WithIt can in table form store into the RAM of microcontroller.
In the present embodiment, the microcontroller is also associated with a display module for showing connection box of electric energy meter mode.
In the present embodiment, in step s 2, four phase differences of electric energy meter output are successively through signal acquisition module, signal
Conditioning module is electrically connected with the microcontroller.
Below by following four differentiation examples, technical solution provided by the present invention is explained further.
(1) differentiate example one
Wherein, Figure 10 is the phasor diagram for differentiating example one, and Figure 11 is the first connectionFigure 12 is
Second of connection
(2) differentiate example two
Wherein, Figure 13 is the phasor diagram for differentiating example two, and Figure 14 is the first connection
Figure 15 is second of connection
(3) differentiate example three
Wherein, Figure 16 is the phasor diagram for differentiating example three, and Figure 17 is the first connectionFigure 18
It is second of connection
In addition, such as the following table 2 and the full table that table 3 is 192 kinds of phase three-wire three active energy metering device modes of connection.
96 kinds of modes of connection when 2 voltage transformer TV of table is without single reversal connection
96 kinds of modes of connection when 2 (Continued) voltage transformer TV of table is without single reversal connection
There are 96 kinds of modes of connection when single reversal connection by 3 voltage transformer TV of table
There are 96 kinds of modes of connection when single reversal connection by 3 (Continued) voltage transformer TV of table
Table 2, table 3 are by voltage link aligned transfer, and it is identical often to erect row 8 voltage links, respectively with 8 kinds of set of currents
It closes.1. with 2., 3. with being 4. all the identical wiring mentioned in similar table 1.And it is 1. exchanged with 3. two component space positions；2. with
4. two component space positions are exchanged.Therefore the same power supply electric energy reading of every-four kinds of pair of connecting wires of row is identical.This " 192 kind three
The three full table of the line active energy metering device mode of connection of phase " also belongs to the domestic full table of specification first appeared.
In conclusion a kind of method of 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination provided by the invention, is surveyed
It is few to measure parameter, proposes to measure voltage for the first timeLagPhase differenceIt proposes for the first time respectively from electrical voltage system, electric current
The respective phase difference of system is started with, and differentiates the wiring type of two systems respectively.Differentiation is set to have walked shortcut, identification effect is high, fits
Conjunction is promoted the use of.
Above-listed preferred embodiment provided by the invention has carried out further the object, technical solutions and advantages of the present invention
It is described in detail.It should be understood that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not intended to limit the invention,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (7)
1. the method for 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination, which is characterized in that include the following steps：
Step S0：By two voltage transformer TV, two current transformer TA respectively through secondary circuit line and electric energy meter with three
Three-phase three-wire system is connected；
Step S1：By one for differentiating that the intelligence instrument of the three-phase three-wire electric energy meter mode of connection is connected with the inlet wire of electric energy meter；
The intelligence instrument include four voltage terminals, wherein three voltage terminals by electric energy meter field terminal box respectively with electricity
Can first voltage input terminal, the second voltage input terminal of table connect with tertiary voltage input terminal, another voltage terminal and
The ground terminal of voltage transformer TV connects；The two-way inlet wire current of electric energy meter It is connected respectively with intelligence instrument after decaying,
The voltage of wherein first voltage input terminal to second voltage input terminal isTertiary voltage input terminal is to second voltage input terminal
Voltage beThe voltage of second voltage input terminal to the ground terminal of voltage transformer TV is
Step S2：Set the voltage of electric energy meter input intelligence instrumentForForForPass through intelligence
Four phase differences of instrument measurement：LagPhase differenceLagPhaseLagPhase
Potential differenceWithLagPhase difference
Step S3：Four phase differences in step S2 are input to the judging unit in intelligence instrument, are first differentiated by judging unit
The voltage link mode of the three-phase three-wire electric energy meter；
Step S4:It is derived by step S3 under each voltage linkLagPhase differenceAndLag's
Phase differenceAnd by each voltage link and correspondingWithIt stores in table form into intelligence instrument, wherein
WithFor the phase voltage of power supply system；
Step S5：Judged by judging unitLagPhase difference, ifLagPhase be 240 ° or 60 °,It is connected toOrJudge again at this timeIfLagPhase be 120 ° or 300 °,It is connected toOrAt this time
Judge againIt finally obtainsLagOut of phase difference under the electric energy meter electric current wiring；
In step s3, differentiate that the voltage link mode of the three-phase three-wire electric energy meter includes the following steps：
Step S31：Three pressure-wires of secondary circuit of the voltage transformer TV are a, b and c, wherein a, b and c and electric energy meter
Voltage input end arbitrarily connects；
Step S32:The two Same Name of Ends TV I and TV II for setting voltage transformer TV are when just connecing, to obtain at this timeLagPhaseThe case where：
(1)At this timeIn advanceFor positive phase sequence,
ThenThe ground terminal of the second voltage input terminal of electric energy meter and voltage transformer connects at this time, obtains electric energy meter at this time
Voltage link be
OrI.e.The voltage link of electric energy meter is at this time
OrI.e.The voltage link of electric energy meter is at this time
(2)At this timeIn advanceFor negative phase sequence,
ThenObtaining electrical energy meter electricity compression bonded line is
OrThat is,Obtaining electrical energy meter electricity compression bonded line at this time is
OrThat is,Obtaining electrical energy meter electricity compression bonded line at this time is
Step S33：Two Same Name of Ends TV I of setting voltage transformer TV are just to connect, and when TV II is reversal connection, obtain at this timeLagPhaseThe case where：
(1)At this timeObtaining electrical energy meter electricity compression bonded line at this time is
(2)At this timeObtaining electrical energy meter electricity compression bonded line at this time is
(3)ThenObtaining electrical energy meter electricity compression bonded line at this time isOtherwiseObtaining electrical energy meter electricity compression bonded line at this time is
(4)ThenObtaining electrical energy meter electricity compression bonded line at this time isOtherwiseObtaining electrical energy meter electricity compression bonded line at this time is
2. the method for 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination according to claim 1, feature exist
In in step S33, the intelligence instrument is also devised with an indicator light, whether there is for light prompting voltage transformer TV
Single reversal connection.
3. the method for 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination according to claim 1, feature exist
In in the step S5, the differentiation of the electric current mode of connection specifically includes following steps：
Step S51：It first determines whetherLagPhase difference
Step S52：IfThenGo to step S53；OtherwiseGo to step S53；
Step S53:JudgeIf so, the electric current wiring for obtaining electric energy meter isOr
Go to step S530；Otherwise, step S54 is gone to；
Step S530：In invocation step S4And in conjunction withIf judgingThenOtherwise
Step S54：If judgingThe electric current wiring for then obtaining electric energy meter isOrTurn
To step S540；Otherwise, step S55 is gone to；
Step S540：In invocation step S4And in conjunction withIf judgingThenIt is no
Then
Step S55：If judgingThe electric current wiring for then obtaining electric energy meter is：OrTurn
To step S550；Otherwise step S56 is gone to；
Step S550：In invocation step S4And in conjunction withIf judgingThen,It is no
Then
Step S56：If judgingThe electric current wiring for then obtaining electric energy meter is：OrTurn
To step S560；
Step S560：In invocation step S4And in conjunction withIf judgingThenIt is no
Then
4. the method for 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination according to claim 1, feature exist
In the electric energy meter includes four current terminals, respectively the first current terminal, the second current terminal, third current terminal and the 4th
Current terminal, the inlet wire current of electric energy meterIt flows into through the first current terminal, then is flowed out through the second current terminal；The inlet wire current of electric energy meterIt flows into through third current terminal, then is flowed out through the 4th current terminal.
5. the method for 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination according to claim 1, feature exist
In the control module that, the intelligence instrument includes a shell and is placed in shell, the control module include judgements singly
Member and the interface circuit that is electrically connected with the judging unit, the judging unit be microcontroller, each voltage connects in step s 4
Line and correspondingWithIt is stored in table form into the RAM of microcontroller.
6. the method for 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination according to claim 5, feature exist
In the microcontroller is also associated with a display module for showing connection box of electric energy meter mode.
7. the method for 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination according to claim 5, feature exist
In in step s 2, four phase differences of electric energy meter output are successively through signal acquisition module, Signal-regulated kinase and the monolithic
Electromechanics is even.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1027538B1 (en) * | 2019-09-02 | 2021-03-29 | Phoenix Contact Gmbh & Co | Procedure for verifying phase assignments |
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| CN106443313B (en) * | 2016-09-29 | 2018-10-12 | 国网四川省电力公司电力科学研究院 | High pressure three-phase-three-wire energy measurement device false wiring rapid detection method |
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| CN108072810A (en) * | 2016-11-18 | 2018-05-25 | 广东电网有限责任公司东莞供电局 | Wiring detection method and system of metering wiring practical training platform |
| CN107656234A (en) * | 2017-09-11 | 2018-02-02 | 国网山东省电力公司烟台供电公司 | A kind of phase three-wire three high-voltage electric-energy meter online test method and device |
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| CN110824409B (en) * | 2019-11-22 | 2022-04-05 | 周秀琴 | Three-phase three-wire electric energy meter wiring mode identification method, electric energy meter and equipment |
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| CN113325337B (en) * | 2021-04-14 | 2022-12-27 | 深圳市盛弘电气股份有限公司 | Source-side current transformer wiring detection method and system and current management equipment |
| CN113433507B (en) * | 2021-06-22 | 2023-02-07 | 保定新云达电力设备有限责任公司 | Electric energy meter metering fault analysis system and analysis method |
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| US8558531B2 (en) * | 2010-06-22 | 2013-10-15 | General Electric Company | Method and system for indicating faults in an electricity meter |
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| CN104459603A (en) * | 2014-12-26 | 2015-03-25 | 杨兴旺 | Method and device for detecting three-phase three-wire energy measurement device |
| CN105548793A (en) * | 2015-12-31 | 2016-05-04 | 深圳市科陆电子科技股份有限公司 | Wiring identification method based load impedance feature |
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| BE1027538B1 (en) * | 2019-09-02 | 2021-03-29 | Phoenix Contact Gmbh & Co | Procedure for verifying phase assignments |
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