CN109142960A - A kind of online discriminating method of phase three-wire three metering device false wiring and system - Google Patents
A kind of online discriminating method of phase three-wire three metering device false wiring and system Download PDFInfo
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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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Abstract
The invention discloses a kind of online discriminating method of phase three-wire three metering device false wiring and systems, it includes: to be called together to survey the line voltage virtual value of first element and second element, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and power factor in phase three-wire three metering device according to electricity consumption acquisition system；The wiring of metering device is judged according to the line voltage virtual value of first element and second element, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and power factor, identifies the false wiring in metering device.The beneficial effect that the present invention obtains is: being screened based on the realization of existing power information acquisition system to the false wiring of phase three-wire three metering device online, to realize that the intelligence of false wiring is screened, reduces the workload and security risk of field-checking.
Description
Technical field
The present invention relates to Electric Energy Metering Technology field, especially a kind of phase three-wire three metering device false wiring is screened online
Method and system.
Background technique
Phase three-wire three measurent wiring mode is chiefly used in isolated neutral system (voltages etc. such as including 10kV, 35kV at present
Grade), power distribution network is related generally to, conveys electric energy for power consumer, energy flow direction is one-way flow.Phase three-wire three metering device includes
Three-phase three-wire electric energy meter, voltage transformer, current transformer, secondary circuit, and there is wiring error in any one link
It all will lead to the accuracy of electrical energy measurement.In phase three-wire three metering device, voltage transformer mostly uses the V-V mode of connection, and
The primary side and secondary side of voltage transformer are line voltage, when the primary side or secondary side polarity of voltage transformer are reversed, or
Person's voltage phase sequence mistake, it is more increasingly complex than the voltage transformer false wiring of phase three-wire three metering device.
Due to filling sense of responsibility, professional skill and the qualification of table wiring personnel, the electric power law of power consumer, regulation
Realize thin, intentional stealing.It is usually at present to pass through on-site calibrator to carry out artificial school at the scene for the judgement of false wiring
It tests, check, for different types of load, round of visits is different, and field test time and effort consuming, and field connection has peace
Full blast danger.
Summary of the invention
In view of the above drawbacks of the prior art, it is an object of the invention to provide a kind of phase three-wire three metering device mistakes
The online discriminating method of wiring and system realize the mistake to phase three-wire three metering device based on existing power information acquisition system
Wiring is screened online, to realize that the intelligence of false wiring is screened, reduces the workload and security risk of field-checking.
An object of the present invention is that technical solution in this way is realized, a kind of phase three-wire three metering device mistake connects
The online discriminating method of line, it includes:
S1: the number to be judged for surveying first element and second element in phase three-wire three metering device is called together according to electricity consumption acquisition system
According to；
S2: judging the wiring of metering device according to the data to be judged of first element and second element, identification meter
Measure the false wiring in device；
The first element and the second element are located in metering device, and can measure data to be judged.
Further, the data to be judged in the step S1 include: line voltage virtual value；
The step S2 include according to the line voltage virtual value of first element and second element to the wiring of metering device into
Specific step is as follows for row judgement:
S201: the line voltage virtual value U of first element and second element is obtained12、U32And the specified line of metering device
Voltage UL；
S202: if (U12, U32) it is (0,0), (0, UL± 5%UL)、(UL± 5%UL, 0), Or
PersonAny of, then judge wiring for broken string；
S203: if (U12, U32) beOrThen judge that wiring is opposite for broken string or polarity；
S204: if (U12, U32) it is (UL± 5%UL, UL± 5%UL), then judge that wiring is normal；
S205: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAndThe two particular values then judge wiring low voltage；
S206: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then
Judge that wiring voltage is higher.
Further, the data to be judged in the step S1 further include having: line voltage phase sequence；
The step S2 include the specific steps that are judged according to the line voltage phase sequence of first element and second element such as
Under:
S211: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S212: if -65 °≤Δ θU12≤ -55 °, then it is judged as positive phase sequence；
S213: if 55 °≤Δ θU12≤ 65 °, then it is judged as negative phase sequence；
S214: if -130 °≤Δ θU12≤ -110 ° or 110 °≤Δ θU12≤ 130 °, then it is judged as no phase sequence, i.e. wiring
It is opposite for polarity.
Further, the data to be judged in the step S1 further include having: phase current virtual value；
The specific steps judged in the step S2 according to the phase current virtual value of first element and second element are such as
Under:
S221: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter
Maximum current Imax；
S222: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element for broken string or without negative
Lotus；
S223: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S224: if I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is judged as first element and/or second element electricity
Stream is normal.
Further, the data to be judged in the step S1 further include having: phase current phase sequence；
Judged that specific step is as follows according to the phase current phase sequence of first element and second element in the step S2:
S231: the phase difference θ of the phase current of first element and second element is obtainedI12；
S232: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S233: if Δ θI12Less than 0, then negative phase sequence is determined as.
Further, the data to be judged in the step S1 further include having: reactive power and power factor；
Each element is calculated according to the reactive power and power factor of first element and second element in the step S2
Specific step is as follows for power-factor angle:
S241: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S242: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and mutually electricity is calculated
The phase angle difference of the phase angle difference of pressure and the reverse current of biphase current and phase voltage；
S243: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification is wrong
Mis-wired.
Further, steps are as follows for the calculating of the power-factor angle in step S242:
S2421: pass through the power factor of first elementWith the power factor of second elementIt calculates separately
The absolute value of the power-factor angle of first element outThe absolute value of the power-factor angle of second element
S2422: formula is utilizedIn conjunction with the reactive power Q of first element1, second element idle function
Rate Q2And step S2421's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
Another object of the present invention is that technical solution in this way is realized, a kind of phase three-wire three metering device mistake
The online discrimination system of wiring, it includes: the system comprises have data acquisition unit and data identification unit；
The data acquisition unit calls together according to electricity consumption acquisition system and surveys first element and second in phase three-wire three metering device
Line voltage virtual value, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and the power factor of element；
The data identification unit is according to first element and the line voltage virtual value of second element, line voltage phase sequence, mutually electricity
Stream virtual value, phase current phase sequence, reactive power and power factor judge the wiring of metering device, identify in metering device
False wiring.
Further, the specific identification process of the data identification unit includes: according to first element and second element
Line voltage virtual value judges that the wiring of metering device, specific step is as follows for judgement:
S801: the line voltage virtual value U of first element and second element is obtained12、U32And the specified line of metering device
Voltage UL；
S802: if (U12, U32) it is (0,0), (0, UL± 5%UL)、(UL± 5%UL, 0), Or
PersonAny of, then judge wiring for broken string；
S803: if (U12, U32) beOrThen judge that wiring is opposite for broken string or polarity；
S804: if (U12, U32) it is (UL± 5%UL, UL± 5%UL), then judge that wiring is normal；
S805: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAndThe two particular values then judge wiring low voltage；
S806: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then
Judge that wiring voltage is higher.
Further, the specific identification process of the data identification unit includes: according to first element and second element
The wiring of line voltage phase ordered pair metering device is judged that specific step is as follows for judgement:
S901: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S902: if -65 °≤Δ θU12≤ -55 °, then it is judged as positive phase sequence；
S903: if 55 °≤Δ θU12≤ 65 °, then it is judged as negative phase sequence；
S904: if -130 °≤Δ θU12≤ -110 ° or 110 °≤Δ θU12≤ 130 °, then it is judged as no phase sequence, i.e. wiring
It is opposite for polarity.
Further, the specific identification process of the data identification unit includes: according to first element and second element
Phase current virtual value judges that the wiring of metering device, specific step is as follows for judgement:
S1001: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter
Maximum current Imax；
S1002: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element for broken string or nothing
Load；
S1003: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S1004: if I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is judged as first element and/or second element electricity
Stream is normal.
Further, the specific identification process of the data identification unit includes: according to first element and second element
The wiring of phase current phase ordered pair metering device is judged that specific step is as follows for judgement:
S1101: the phase difference θ of the phase current of first element and second element is obtainedI12；
S1102: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S1103: if Δ θI12Less than 0, then negative phase sequence is determined as.
Further, the specific identification process of the data identification unit includes: according to first element and second element
Reactive power and power factor judge that the wiring of metering device, specific step is as follows for judgement:
S1201: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S1202: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and mutually electricity is calculated
The phase angle difference of the phase angle difference of pressure and the reverse current of biphase current and phase voltage；
S1203: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification is wrong
Mis-wired；
Steps are as follows for the calculating of power-factor angle in step S1202:
S1211: pass through the power factor of first elementWith the power factor of second elementIt calculates separately
The absolute value of the power-factor angle of first element outThe absolute value of the power-factor angle of second element
S1212: formula is utilizedIn conjunction with the reactive power Q of first element1, second element idle function
Rate Q2And step S2421's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
Further, the metering device includes one of following:
Three-phase three-wire electric energy meter, voltage transformer, current transformer, secondary circuit.
By adopting the above-described technical solution, the present invention has the advantage that:
(1) present invention can realize in such a way that hardware, software or hardware and software combine；
(2) present invention obtains the data for screening false wiring by power information acquisition system online, direct by system
The metering device of false wiring is screened out, so that scene be avoided manually to be examined and determine, improves efficiency and hair that false wiring is screened
The timeliness of existing false wiring；
(3) present invention utilizes the line voltage virtual value U of first element and second element12、U32And phase difference θU12, into
The forward and inverse phase sequence of row voltage phase sequence and without judging phase order, to identify the reversed false wiring of polarity.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.
Detailed description of the invention
Detailed description of the invention of the invention is as follows:
Fig. 1 is the flow diagram of the online discriminating method of phase three-wire three metering device false wiring of a certain embodiment.
Fig. 2 is the flow diagram of the online discriminating method of phase three-wire three metering device false wiring of another embodiment.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1: as shown in Figure 1；A kind of online discriminating method of phase three-wire three metering device false wiring, it includes:
S1: calling the line voltage of first element and second element in survey phase three-wire three metering device together according to electricity consumption acquisition system has
Valid value, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and power factor；
S2: according to first element and the line voltage virtual value of second element, line voltage phase sequence, phase current virtual value, mutually electricity
Stream phase sequence, reactive power and power factor judge the wiring of metering device, identify the false wiring in metering device；
The first element and the second element are located in metering device, and can measure line voltage and phase current.
The wiring of metering device is judged according to the line voltage virtual value of first element and second element in step S2
Specific step is as follows:
S201: the line voltage virtual value U of first element and second element is obtained12、U32And the specified line of metering device
Voltage UL；
S202: if (U12, U32) it is (0,0), (0, UL± 5%UL)、(UL± 5%UL, 0), Or
PersonAny of, then judge wiring for broken string.
S203: if (U12, U32) beOrThen judge that wiring is opposite for broken string or polarity.
S204: if (U12, U32) it is (UL± 5%UL, UL± 5%UL), then judge that wiring is normal.
S205: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAndThe two particular values then judge wiring low voltage；
S206: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then
Judge that wiring voltage is higher.
Judged that specific step is as follows according to the line voltage phase sequence of first element and second element in step S2:
S211: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S212: if -65 °≤Δ θU12≤ -55 °, then it is judged as positive phase sequence；
S213: if 500 °≤Δ θU12≤ 65 °, then it is judged as negative phase sequence；
S214: if -130 °≤Δ θU12≤ -110 ° or 110 °≤Δ θU12≤ 130 °, then it is judged as no phase sequence, i.e. wiring
It is opposite for polarity.
Judged that specific step is as follows according to the phase current virtual value of first element and second element in step S2:
S221: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter
Maximum current Imax；
S222: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element for broken string or without negative
Lotus；
S223: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S224: if I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is judged as first element and/or second element electricity
Stream is normal.
Judged that specific step is as follows according to the phase current phase sequence of first element and second element in step S2:
S231: the phase difference θ of the phase current of first element and second element is obtainedI12；
S232: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S233: if Δ θI12Less than 0, then negative phase sequence is determined as.
The power of each element is calculated in step S2 according to the reactive power and power factor of first element and second element
Specific step is as follows at factor angle:
S241: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S242: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and mutually electricity is calculated
The phase angle difference of the phase angle difference of pressure and the reverse current of biphase current and phase voltage；
S243: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification is wrong
Mis-wired.
Steps are as follows for the calculating of power-factor angle in step S242:
S2421: pass through the power factor of first elementWith the power factor of second elementIt calculates separately
The power-factor angle of first element outThe power-factor angle of second element
S2422: formula is utilizedIn conjunction with the reactive power Q of first element1, second element idle function
Rate Q2And step S2421's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
A kind of online discrimination system of phase three-wire three metering device false wiring, it includes: data acquisition unit and data
Recognition unit；
Data acquisition unit calls together according to electricity consumption acquisition system and surveys first element and second element in phase three-wire three metering device
Line voltage virtual value, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and power factor；
Data identification unit has according to the line voltage virtual value of first element and second element, line voltage phase sequence, phase current
Valid value, phase current phase sequence, reactive power and power factor judge the wiring of metering device, identify the mistake in metering device
Mis-wired.
The metering device includes three-phase three-wire electric energy meter, voltage transformer, current transformer, secondary circuit.
Data identification unit is able to carry out following operation:
(1) wiring of metering device is judged according to the line voltage virtual value of first element and second element:
Obtain the line voltage virtual value U of first element and second element12、U32And the rated line voltage U of metering deviceL；
If (U12, U32) it is (0,0), (0, UL± 5%UL)、(UL± 5%UL, 0),
OrAny of, then judge wiring for broken string.
If (U12, U32) beOr Then judge that wiring is opposite for broken string or polarity.
If (U12, U32) beThen judge that wiring is normal.
If U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAndThe two particular values then judge wiring low voltage；
If U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then judgement connects
Line voltage is higher.
(2) judged according to the line voltage phase sequence of first element and second element:
Obtain the phase difference θ between first element and the line voltage of second elementU12；
If -65 °≤Δ θU12≤ -55 °, then it is judged as positive phase sequence；
If 55 °≤Δ θU12≤ 65 °, then it is judged as negative phase sequence；
If -130 °≤Δ θU12≤ -110 ° or 110 °≤Δ θU12≤ 130 °, then it is judged as no phase sequence, i.e. wiring is pole
Property is opposite.
(3) judged according to the phase current virtual value of first element and second element:
Obtain the phase current virtual value I of first element, second element1、I2, electric energy meter rated current In, the maximum electricity of electric energy meter
Flow Imax；
If I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element is broken string or zero load；
If I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
If I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is being judged as first element and/or second element electric current just
Often.
(4) judged that specific step is as follows according to the phase current phase sequence of first element and second element:
Obtain the phase difference θ of the phase current of first element and second elementI12；
If Δ θI12Greater than 0, then positive phase sequence is determined as；
If Δ θI12Less than 0, then negative phase sequence is determined as.
(5) power factor of each element is calculated according to the reactive power and power factor of first element and second element
Angle:
On the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
Using the phase angle difference of power-factor angle and phase voltage and reference voltage, phase of the biphase current with phase voltage is calculated
The phase angle difference of the reverse current and phase voltage of angular difference and biphase current；
Using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification mistake connects
Line.
(6) calculating of power-factor angle:
Pass through the power factor of first elementWith the power factor of second elementCalculate separately out first
The power-factor angle of elementThe power-factor angle of second element
Utilize formulaIn conjunction with the reactive power Q of first element1, second element reactive power Q2, with
And previous step as a result, the power-factor angle of first element is calculatedThe power-factor angle of second element
The present invention can realize in such a way that hardware, software or hardware and software combine；The present invention passes through electricity consumption
Information acquisition system obtains the data for screening false wiring online, and the metering device of false wiring is directly screened out by system,
To avoid scene from manually being examined and determine, the timeliness of efficiency and discovery false wiring that false wiring is screened is improved；The present invention
Utilize the line voltage virtual value U of first element and second element12、U32And phase difference θU12, carry out the forward and inverse of voltage phase sequence
Phase sequence and without judging phase order, to identify the reversed false wiring of polarity.
Embodiment 2: as shown in Figure 1；A kind of online discriminating method of phase three-wire three metering device false wiring, it includes:
S1: calling the line voltage of first element and second element in survey phase three-wire three metering device together according to electricity consumption acquisition system has
Valid value, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and power factor；
S2: according to first element and the line voltage virtual value of second element, line voltage phase sequence, phase current virtual value, mutually electricity
Stream phase sequence, reactive power and power factor judge the wiring of metering device, identify the false wiring in metering device；
The first element and the second element are located in metering device, and can measure line voltage and phase current.
The wiring of metering device is judged according to the line voltage virtual value of first element and second element in step S2
Specific step is as follows:
S201: the line voltage virtual value U of first element and second element is obtained12、U32And the specified line of metering device
Voltage UL；
S202: if (U12, U32) it is (0,0), (0, UL)、(UL, 0),
OrAny of, then judge wiring for broken string.
S203: if (U12, U32) beOrThen judge wiring for broken string or
Polarity is opposite.
S204: if (U12, U32) it is (UL, UL), then judge that wiring is normal.
S205: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAndThe two are special
Value, then judge wiring low voltage；
S206: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value then judges wiring electricity
It presses higher.
Judged that specific step is as follows according to the line voltage phase sequence of first element and second element in step S2:
S211: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S212: if Δ θU12=-65 °, then it is judged as positive phase sequence；
S213: if Δ θU12=55 °, then it is judged as negative phase sequence；
S214: if Δ θI12=-130 ° or Δ θI12=110 °, then it is judged as no phase sequence, i.e. wiring is that polarity is opposite.
Judged that specific step is as follows according to the phase current virtual value of first element and second element in step S2:
S221: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter
Maximum current Imax；
S222: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element for broken string or without negative
Lotus；
S223: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S224: if I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is judged as first element and/or second element electricity
Stream is normal.
Judged that specific step is as follows according to the phase current phase sequence of first element and second element in step S2:
S231: the phase difference θ of the phase current of first element and second element is obtainedI12；
S232: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S233: if Δ θI12Less than 0, then negative phase sequence is determined as.
The power of each element is calculated in step S2 according to the reactive power and power factor of first element and second element
Specific step is as follows at factor angle:
S241: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S242: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and mutually electricity is calculated
The phase angle difference of the phase angle difference of pressure and the reverse current of biphase current and phase voltage；
S243: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification is wrong
Mis-wired.
Steps are as follows for the calculating of power-factor angle in step S242:
S2421: pass through the power factor of first elementWith the power factor of second elementIt calculates separately
The power-factor angle of first element outThe power-factor angle of second element
S2422: formula is utilizedIn conjunction with the reactive power Q of first element1, second element idle function
Rate Q2And step S2421's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
The present invention can realize in such a way that hardware, software or hardware and software combine；The present invention passes through electricity consumption
Information acquisition system obtains the data for screening false wiring online, and the metering device of false wiring is directly screened out by system,
To avoid scene from manually being examined and determine, the timeliness of efficiency and discovery false wiring that false wiring is screened is improved；The present invention
Utilize the line voltage virtual value U of first element and second element12、U32And phase difference θU12, carry out the forward and inverse of voltage phase sequence
Phase sequence and without judging phase order, to identify the reversed false wiring of polarity.
Embodiment 3: as shown in Figure 1；A kind of online discriminating method of phase three-wire three metering device false wiring, it includes:
S1: calling the line voltage of first element and second element in survey phase three-wire three metering device together according to electricity consumption acquisition system has
Valid value, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and power factor；
S2: according to first element and the line voltage virtual value of second element, line voltage phase sequence, phase current virtual value, mutually electricity
Stream phase sequence, reactive power and power factor judge the wiring of metering device, identify the false wiring in metering device；
The first element and the second element are located in metering device, and can measure line voltage and phase current.
The wiring of metering device is judged according to the line voltage virtual value of first element and second element in step S2
Specific step is as follows:
S201: the line voltage virtual value U of first element and second element is obtained12、U32And the specified line of metering device
Voltage UL；
S202: if (U12, U32) it is (0,0), (0, UL+ 5%UL)、(UL+ 5%UL, 0), Or
PersonAny of, then judge wiring for broken string.
S203: if (U12, U32) beOrThen judge that wiring is opposite for broken string or polarity.
S204: if (U12, U32) it is (UL+5%UL, UL+5%UL), then judge that wiring is normal.
S205: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAndThe two particular values then judge wiring low voltage；
S206: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then
Judge that wiring voltage is higher.
Judged that specific step is as follows according to the line voltage phase sequence of first element and second element in step S2:
S211: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S212: if Δ θU12=-60 °, then it is judged as positive phase sequence；
S213: if Δ θU12=60 °, then it is judged as negative phase sequence；
S214: if Δ θI12=-120 ° or Δ θI12=120 °, then it is judged as no phase sequence, i.e. wiring is that polarity is opposite.
Judged that specific step is as follows according to the phase current virtual value of first element and second element in step S2:
S221: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter
Maximum current Imax；
S222: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element for broken string or without negative
Lotus；
S223: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S224: if I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is judged as first element and/or second element electricity
Stream is normal.
Judged that specific step is as follows according to the phase current phase sequence of first element and second element in step S2:
S231: the phase difference θ of the phase current of first element and second element is obtainedI12；
S232: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S233: if Δ θI12Less than 0, then negative phase sequence is determined as.
The power of each element is calculated in step S2 according to the reactive power and power factor of first element and second element
Specific step is as follows at factor angle:
S241: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S242: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and mutually electricity is calculated
The phase angle difference of the phase angle difference of pressure and the reverse current of biphase current and phase voltage；
S243: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification is wrong
Mis-wired.
Steps are as follows for the calculating of power-factor angle in step S242:
S2421: pass through the power factor of first elementWith the power factor of second elementIt calculates separately
The power-factor angle of first element outThe power-factor angle of second element
S2422: formula is utilizedIn conjunction with the reactive power Q of first element1, second element idle function
Rate Q2And step S2421's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
The present invention can realize in such a way that hardware, software or hardware and software combine；The present invention passes through electricity consumption
Information acquisition system obtains the data for screening false wiring online, and the metering device of false wiring is directly screened out by system,
To avoid scene from manually being examined and determine, the timeliness of efficiency and discovery false wiring that false wiring is screened is improved；The present invention
Utilize the line voltage virtual value U of first element and second element12、U32And phase difference θU12, carry out the forward and inverse of voltage phase sequence
Phase sequence and without judging phase order, to identify the reversed false wiring of polarity.
Embodiment 4: as shown in Figure 2；A kind of online discriminating method of phase three-wire three metering device false wiring, it includes:
S11, reactive power, power factor, the line voltage that power information acquisition system calls survey three-phase three-wire electric energy meter together are effective
Value, phase current virtual value, line voltage phase sequence, phase current phase sequence；
S12 differentiates broken string (or polarity wiring), over-voltage, low using the line voltage virtual value of first element, second element
Pressure, voltage are normal；
S13 differentiates that reversed polarity, phase sequence mistake, phase sequence are normal using the voltage phase sequence of line voltage；
S14 is differentiating broken string (zero load), overload, electric current just using the phase current virtual value of first element, second element
Often；
S15 is normal using electric current phase sequence cognition phase sequence mistake, the phase sequence of phase current；
S16 calculates the power-factor angle of each element using first element, the reactive power of second element, power factor；
S17 determines the phase difference of phase voltage and reference voltage using voltage phase sequence on the basis of a certain line voltage；
S18 obtains phase of the biphase current with phase voltage using the phase angle difference of power-factor angle and phase voltage and reference voltage
The phase angle difference of the reverse current and phase voltage of angular difference and biphase current；
S19 carries out voltage, electric current to identify mistake with matching using load condition or the data of adjacent stoichiometric point
Wiring.
Step S12 interrupt line, over-voltage, low pressure, voltage normally judge the following steps are included:
S121: the line voltage virtual value U of first element and second element is obtained12、U32And the specified line of metering device
Voltage UL；
S122: if (U12, U32) it is (0,0), (0, UL- 5%UL)、(UL- 5%UL, 0), Or
PersonAny of, then judge wiring for broken string.
S123: if (U12, U32) beOrThen judge that wiring is opposite for broken string or polarity.
S124: if (U12, U32) it is (UL- 5%UL, UL- 5%UL), then judge that wiring is normal.
S125: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAndThe two particular values then judge wiring low voltage；
S126: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then
Judge that wiring voltage is higher.
In step S13 voltage phase sequence judgement the following steps are included:
S131: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S132: if Δ θU12=-55 °, then it is judged as positive phase sequence；
S133: if Δ θU12=65 °, then it is judged as negative phase sequence；
S134: if Δ θI12=-110 ° or Δ θI12=130 °, then it is judged as no phase sequence, i.e. wiring is that polarity is opposite.
Step S14 interrupt line (zero load), overload, electric current normally judge the following steps are included:
S141: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter
Maximum current Imax；
S142: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element for broken string or without negative
Lotus；
S143: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S144: if I1And/or I2Greater than 0.05%InAnd it is greater than Imax, then it is judged as first element and/or second element electricity
Stream is normal.
Electric current judging phase order in step S15 the following steps are included:
S151: the phase difference θ of the phase current of first element and second element is obtainedI12；
S152: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S153: if Δ θI12Less than 0, then negative phase sequence is determined as.
In step S16 calculate power-factor angle the following steps are included:
S161: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S162: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and mutually electricity is calculated
The phase angle difference of the phase angle difference of pressure and the reverse current of biphase current and phase voltage；
S163: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification is wrong
Mis-wired.
Steps are as follows for the calculating of power-factor angle in step S162:
S1621: pass through the power factor of first elementWith the power factor of second elementIt calculates separately
The power-factor angle of first element outThe power-factor angle of second element
S1622: formula is utilizedIn conjunction with the reactive power Q of first element1, second element idle function
Rate Q2And step S1621's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
The present invention can realize in such a way that hardware, software or hardware and software combine；The present invention passes through electricity consumption
Information acquisition system obtains the data for screening false wiring online, and the metering device of false wiring is directly screened out by system,
To avoid scene from manually being examined and determine, the timeliness of efficiency and discovery false wiring that false wiring is screened is improved；The present invention
Utilize the line voltage virtual value U of first element and second element12、U32And phase difference θU12, carry out the forward and inverse of voltage phase sequence
Phase sequence and without judging phase order, to identify the reversed false wiring of polarity.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, should all cover within the scope of the claims of the present invention.
Claims (13)
1. a kind of online discriminating method of phase three-wire three metering device false wiring, which is characterized in that the method specific steps are such as
Under:
S1: the data to be judged for surveying first element and second element in phase three-wire three metering device are called together according to electricity consumption acquisition system；
S2: judging the wiring of metering device according to the data to be judged of first element and second element, identification metering dress
False wiring in setting；
The first element and the second element are located in metering device, and can measure wait judge the line voltage in data
And/or phase current.
2. the online discriminating method of phase three-wire three metering device false wiring as described in claim 1, which is characterized in that the step
Data to be judged in rapid S1 include: line voltage virtual value；
The step S2 includes being sentenced according to the line voltage virtual value of first element and second element to the wiring of metering device
It is disconnected that specific step is as follows:
S201: the line voltage virtual value U of first element and second element is obtained12、U32And the rated line voltage U of metering deviceL；
S202: if (U12, U32) it is (0,0), (0, UL± 5%UL)、(UL± 5%UL, 0), Or
PersonAny of, then judge wiring for broken string；
S203: if (U12, U32) beOrThen judge that wiring is opposite for broken string or polarity；
S204: if (U12, U32) it is (UL± 5%UL, UL± 5%UL), then judge that wiring is normal；
S205: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAnd
The two particular values then judge wiring low voltage；
S206: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then judgement connects
Line voltage is higher.
3. the online discriminating method of phase three-wire three metering device false wiring as described in claim 1, which is characterized in that the step
Data to be judged in rapid S1 further include having: line voltage phase sequence；
The step S2 includes being judged that specific step is as follows according to the line voltage phase sequence of first element and second element:
S211: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S212: if -65 °≤Δ θU12≤ -55 °, then it is judged as positive phase sequence；
S213: if 55 °≤Δ θU12≤ 65 °, then it is judged as negative phase sequence；
S214: if -130 °≤Δ θU12≤ -110 ° or 110 °≤Δ θU12≤ 130 °, then it is judged as no phase sequence, i.e. wiring is pole
Property is opposite.
4. the online discriminating method of phase three-wire three metering device false wiring as described in claim 1, which is characterized in that the step
Data to be judged in rapid S1 further include having: phase current virtual value；
Judged that specific step is as follows according to the phase current virtual value of first element and second element in the step S2:
S221: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter maximum
Electric current Imax；
S222: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element is broken string or zero load；
S223: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S224: if I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is being judged as first element and/or second element electric current just
Often.
5. the online discriminating method of phase three-wire three metering device false wiring as described in claim 1, which is characterized in that the step
Data to be judged in rapid S1 further include having: phase current phase sequence；
Judged that specific step is as follows according to the phase current phase sequence of first element and second element in the step S2:
S231: the phase difference θ of the phase current of first element and second element is obtainedI12；
S232: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S233: if Δ θI12Less than 0, then negative phase sequence is determined as.
6. the online discriminating method of phase three-wire three metering device false wiring as described in claim 1, which is characterized in that the step
Data to be judged in rapid S1 further include having: reactive power and power factor；
The power of each element is calculated in the step S2 according to the reactive power and power factor of first element and second element
Specific step is as follows at factor angle:
S241: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S242: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and phase voltage is calculated
The phase angle difference of the reverse current and phase voltage of phase angle difference and biphase current；
S243: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification mistake connects
Line.
7. the online discriminating method of phase three-wire three metering device false wiring as claimed in claim 6, which is characterized in that step
Steps are as follows for the calculating of power-factor angle in S242:
S2421: pass through the power factor of first elementWith the power factor of second elementCalculate separately out
The absolute value of the power-factor angle of one elementThe absolute value of the power-factor angle of second element
S2422: formula is utilizedIn conjunction with the reactive power Q of first element1, second element reactive power Q2,
And step S2421's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
8. the online discrimination system of phase three-wire three metering device false wiring, which is characterized in that the system comprises have data acquisition
Unit and data identification unit；
The data acquisition unit calls together according to electricity consumption acquisition system and surveys first element and second element in phase three-wire three metering device
Line voltage virtual value, line voltage phase sequence, phase current virtual value, phase current phase sequence, reactive power and power factor；
The data identification unit has according to the line voltage virtual value of first element and second element, line voltage phase sequence, phase current
Valid value, phase current phase sequence, reactive power and power factor judge the wiring of metering device, identify the mistake in metering device
Mis-wired.
9. the online discrimination system of phase three-wire three metering device false wiring as claimed in claim 8, which is characterized in that the number
Include according to the specific identification process of recognition unit: according to the line voltage virtual value of first element and second element to metering device
Wiring judged that specific step is as follows for judgement:
S801: the line voltage virtual value U of first element and second element is obtained12、U32And the rated line voltage of metering device
UL；
S802: if (U12, U32) it is (0,0), (0, UL± 5%UL)、(UL± 5%UL, 0), Or
PersonAny of, then judge wiring for broken string；
S803: if (U12, U32) beOrThen judge that wiring is opposite for broken string or polarity；
S804: if (U12, U32) it is (UL± 5%UL, UL± 5%UL), then judge that wiring is normal；
S805: if U12And U32Positioned at 0 and UL- 5%ULBetween, and U12And U32ExcludeAnd
The two particular values then judge wiring low voltage；
S806: if U12And U32Greater than UL+ 5%UL, and U12And U32ExcludeThis particular value, then judgement connects
Line voltage is higher.
10. the online discrimination system of phase three-wire three metering device false wiring as claimed in claim 8, which is characterized in that described
The specific identification process of data identification unit includes: according to the line voltage phase ordered pair metering device of first element and second element
Wiring judged that specific step is as follows for judgement:
S901: the phase difference θ between first element and the line voltage of second element is obtainedU12；
S902: if -65 °≤Δ θU12≤ -55 °, then it is judged as positive phase sequence；
S903: if 55 °≤Δ θU12≤ 65 °, then it is judged as negative phase sequence；
S904: if -130 °≤Δ θU12≤ -110 ° or 110 °≤Δ θU12≤ 130 °, then it is judged as no phase sequence, i.e. wiring is pole
Property is opposite.
11. the online discrimination system of phase three-wire three metering device false wiring as claimed in claim 8, which is characterized in that described
The specific identification process of data identification unit includes: being filled according to the phase current virtual value of first element and second element to metering
The wiring set is judged that specific step is as follows for judgement:
S1001: the phase current virtual value I of first element, second element is obtained1、I2, electric energy meter rated current In, electric energy meter maximum
Electric current Imax；
S1002: if I1And/or I2Less than 0.05%In, then it is judged as first element and/or second element is broken string or zero load；
S1003: if I1And/or I2Greater than Imax, then it is judged as first element and/or second element overload；
S1004: if I1And/or I2Greater than 0.05%InAnd it is less than Imax, then it is being judged as first element and/or second element electric current just
Often.
12. the online discrimination system of phase three-wire three metering device false wiring as claimed in claim 8, which is characterized in that described
The specific identification process of data identification unit includes: according to the phase current phase ordered pair metering device of first element and second element
Wiring judged that specific step is as follows for judgement:
S1101: the phase difference θ of the phase current of first element and second element is obtainedI12；
S1102: if Δ θI12Greater than 0, then positive phase sequence is determined as；
S1103: if Δ θI12Less than 0, then negative phase sequence is determined as.
13. the online discrimination system of phase three-wire three metering device false wiring as claimed in claim 8, which is characterized in that described
The specific identification process of data identification unit includes: according to the reactive power and power factor pair of first element and second element
The wiring of metering device is judged that specific step is as follows for judgement:
S1201: on the basis of a certain line voltage, the phase difference of phase voltage and reference voltage is determined using line voltage phase sequence；
S1202: using the phase angle difference of power-factor angle and phase voltage and reference voltage, biphase current and phase voltage is calculated
The phase angle difference of the reverse current and phase voltage of phase angle difference and biphase current；
S1203: using load condition or the data of adjacent stoichiometric point, voltage, electric current are carried out with matching, identification mistake connects
Line；
Steps are as follows for the calculating of power-factor angle in step S1202:
S1211: pass through the power factor of first elementWith the power factor of second elementCalculate separately out
The absolute value of the power-factor angle of one elementThe absolute value of the power-factor angle of second element
S1212: formula is utilizedIn conjunction with the reactive power Q of first element1, second element reactive power Q2,
And step S2421's as a result, power-factor angle of first element is calculatedThe power-factor angle of second element
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| 陈静: "感性负载下三相三线错误接线快速判断", 《科技资讯》 * |
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| CN109655782A (en) * | 2019-01-23 | 2019-04-19 | 宁波三星医疗电气股份有限公司 | A kind of three-phase electric energy meter wiring exception self checking method and system |
| CN109782111A (en) * | 2019-03-06 | 2019-05-21 | 国网湖北省电力有限公司黄石供电公司 | A kind of electric energy metered system false wiring analysis method of three-phase three-wire system |
| CN110320393A (en) * | 2019-06-26 | 2019-10-11 | 国网冀北电力有限公司唐山供电公司 | Low -voltage Watt -hour meter wrong-mounting prevention epitope identifier and method with function of opposing electricity-stealing |
| CN110806552A (en) * | 2019-11-22 | 2020-02-18 | 国网北京市电力公司 | Wrong wiring type detection method for three-phase three-wire metering device |
| CN111060754A (en) * | 2019-12-31 | 2020-04-24 | 南京新联智慧能源服务有限公司 | Electric energy information acquisition terminal with automatic phase sequence identification function and automatic phase sequence identification method |
| CN113419206A (en) * | 2021-05-27 | 2021-09-21 | 国网山东省电力公司青岛供电公司 | Three-phase three-wire electric energy meter wiring judgment method, electric energy meter and equipment |
| CN114089222A (en) * | 2021-11-08 | 2022-02-25 | 深圳供电局有限公司 | Method for checking wiring of electric energy meter |
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