CN110221160B - Method and device for determining family, transformer and phase relation - Google Patents
Method and device for determining family, transformer and phase relation Download PDFInfo
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- CN110221160B CN110221160B CN201910677000.8A CN201910677000A CN110221160B CN 110221160 B CN110221160 B CN 110221160B CN 201910677000 A CN201910677000 A CN 201910677000A CN 110221160 B CN110221160 B CN 110221160B
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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
- G01R31/62—Testing of transformers
Abstract
The application discloses a method and a device for determining household, transformer and phase relation, wherein the method comprises the steps of obtaining a first measurement voltage at a meter; regulating the output voltage of the controllable voltage source, wherein the phase angle is the same as or opposite to the phase angle A; acquiring a second measurement voltage at the meter; calculating a first voltage amplitude difference; if the first voltage amplitude difference is not 0, adjusting the output voltage of the controllable voltage source, wherein the phase angle is the same as or opposite to that of the phase angle B; acquiring a third measurement voltage at the meter; calculating a second voltage magnitude difference; adjusting the output voltage of the controllable voltage source, wherein the phase angle is the same as or opposite to that of the phase angle C; acquiring a fourth measurement voltage at the meter; calculating a third voltage magnitude difference; and determining the relationship among the family, the variation and the phase according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference. The method provided by the application not only can effectively determine the relationship between the household and the variable, but also can simultaneously determine the phase of the unknown meter. The principle of the method is simple and reliable, and the relation among the family, the transformer and the phase can be effectively solved.
Description
Technical Field
The present application relates to the field of determining relationships among users, transformers, and phases, and in particular, to a method and an apparatus for determining relationships among users, transformers, and phases.
Background
Distribution transformer is the core device of intelligent power distribution network, and the family of low pressure side, become, looks three relations have important influence to county level power supply enterprise operation maintenance and equipment operation, along with city development, the buried cable increases, and user's intensive degree is higher and higher, and a distribution transformer probably connects thousands of users, and multiple distribution transformer also probably exists in the small scale in addition, causes the family of distribution transformer, becomes, looks three relation mistake easily. The relation error of the household, the transformer and the phase of the distribution transformer influences the accuracy of line loss, loses the guiding significance of the line loss, and causes that the data of a meter can not be acquired when the meter is remotely read, so that the workload of manual on-site meter reading is increased, the labor input is increased, and the relation error of the household, the transformer and the phase also influences the accuracy of archival data.
At present, some equipment and methods for solving the problem of the household transformer relationship of the distribution transformer are provided, which are mainly based on carrier communication and pulse signal technology, but the carrier signal receiving external influence is large, and the interference is easy to happen; when the pulse signal is transmitted in a long distance, the signal attenuation is serious, and the requirement on signal detection is high. The prior art methods also lack the ability to determine the relationship between the unknown user and the facies.
Disclosure of Invention
The application aims to provide a method and a device for determining a relationship between a user, a transformer and a phase, so as to solve the problem of lack of determination of the relationship between an unknown user and a phase.
In one aspect, according to an embodiment of the present application, a method for determining a user, a change, and a phase relationship is provided, including:
acquiring a first measurement voltage at a meter with unknown relation among households, changes and phases;
adjusting a first output voltage of a controllable voltage source, wherein the controllable voltage source is connected with a neutral point of a distribution transformer which can have a determined relation with unknown household, transformer and phase, and the phase angle of the first output voltage is the same as or opposite to A;
acquiring a second measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase;
calculating a first voltage magnitude difference between the second measured voltage and the first measured voltage;
if the first voltage amplitude difference is not 0, adjusting a second output voltage of the controllable voltage source, wherein the phase angle of the second output voltage is the same as or opposite to that of B;
acquiring a third measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase;
calculating a second voltage magnitude difference between the third measured voltage and the first measured voltage;
adjusting a third output voltage of the controllable voltage source, wherein the phase angle of the third output voltage is the same as or opposite to that of the C;
acquiring a fourth measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase;
calculating a third voltage magnitude difference between the fourth measured voltage and the first measured voltage;
determining a family, variation and phase relation according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference;
wherein the first output voltage, the second output voltage and the third output voltage have the same amplitude.
Further, the method further comprises the following steps:
and if the first voltage amplitude difference is 0, judging that the meter without relation among the household, the transformer and the phase does not belong to the distribution transformer.
Further, when the phase angle of the first output voltage is in the same direction as A, the phase angle of the second output voltage is in the same direction as B, and the phase angle of the third output voltage is in the same direction as C; the step of determining the relationship of the user, the variable and the phase according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference comprises the following steps:
if the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is smaller than zero, and the meter which does not know the relationship among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
Further, when the phase angle of the first output voltage is opposite to phase A, the phase angle of the second output voltage is opposite to phase B, and the phase angle of the third output voltage is opposite to phase C; the step of determining the relationship of the user, the variable and the phase according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference comprises the following steps:
if the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is larger than zero, and the meter which does not know the relation among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
Further, the magnitudes of the first output voltage, the second output voltage and the third output voltage are 5-15V.
In another aspect, according to an embodiment of the present application, there is provided a user, change and phase relation determining apparatus including:
the first acquisition unit is used for acquiring a first measurement voltage at a meter with unknown relation among households, phase change and phase;
the first regulating unit is used for regulating a first output voltage of a controllable voltage source, the controllable voltage source is connected with a neutral point of a distribution transformer which can have a determined relation with unknown household, transformer and phase, and the phase angle of the first output voltage is the same as or opposite to that of A;
the second acquisition unit is used for acquiring a second measurement voltage at the meter with the unknown relation among the household, the transformer and the phase;
a first calculation unit for calculating a first voltage amplitude difference between the second measurement voltage and the first measurement voltage;
the second adjusting unit is used for adjusting a second output voltage of the controllable voltage source if the first voltage amplitude difference is not 0, and the phase angle of the second output voltage is the same as or opposite to that of the second output voltage;
the third acquisition unit is used for acquiring a third measurement voltage at the meter with the relationship among the unknown household, the unknown phase and the unknown phase;
a second calculation unit for calculating a second voltage amplitude difference between the third measured voltage and the first measured voltage;
the third regulating unit is used for regulating a third output voltage of the controllable voltage source, and the phase angle of the third output voltage is the same as or opposite to that of the phase angle C;
the fourth acquisition unit is used for acquiring a fourth measurement voltage at the meter with the unknown relation among the household, the transformer and the phase;
a third calculation unit for calculating a third voltage magnitude difference between the fourth measured voltage and the first measured voltage;
the determining unit is used for determining a family, a variation and a phase relation according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference;
wherein the first output voltage, the second output voltage and the third output voltage have the same amplitude.
Further, the device also comprises:
and the judging unit is used for judging that the meter with unknown relation among the household, the transformer and the phase does not belong to the distribution transformer if the first voltage amplitude difference is 0.
Further, when the phase angle of the first output voltage is in the same direction as A, the phase angle of the second output voltage is in the same direction as B, and the phase angle of the third output voltage is in the same direction as C; the determining unit is further configured to:
if the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is smaller than zero, and the meter which does not know the relationship among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
Further, when the phase angle of the first output voltage is opposite to phase A, the phase angle of the second output voltage is opposite to phase B, and the phase angle of the third output voltage is opposite to phase C; the determining unit is further configured to:
if the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is larger than zero, and the meter which does not know the relation among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
According to the technical scheme, the embodiment of the application provides a method and a device for determining the relation between a household, a transformer and a phase, wherein the method comprises the steps of obtaining a first measurement voltage at a meter with the relation between the unknown household, the transformer and the phase; adjusting a first output voltage of a controllable voltage source, wherein the controllable voltage source is connected with a neutral point of a distribution transformer which can have a determined relation with unknown household, transformer and phase, and the phase angle of the first output voltage is the same as or opposite to A; acquiring a second measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase; calculating a first voltage magnitude difference between the second measured voltage and the first measured voltage; if the first voltage amplitude difference is not 0, adjusting a second output voltage of the controllable voltage source, wherein the phase angle of the second output voltage is the same as or opposite to that of B; acquiring a third measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase; calculating a second voltage magnitude difference between the third measured voltage and the first measured voltage; adjusting a third output voltage of the controllable voltage source, wherein the phase angle of the output voltage is the same as or opposite to that of the phase angle C; acquiring a fourth measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase; calculating a third voltage magnitude difference between the fourth measured voltage and the first measured voltage; and determining a family, variation and phase relation according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference. The method provided by the application not only can effectively determine the relationship between the household and the variable, but also can simultaneously determine the phase of the unknown meter. The principle of the method is simple and reliable, and the relation among the family, the transformer and the phase can be effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a method for determining a relationship between a user, a transformer and a phase according to an embodiment of the present application;
fig. 2 is a flowchart of a method for determining a relationship between a user, a change, and a phase according to an embodiment of the present application.
Fig. 3 is a block diagram illustrating a structure of a user, change, and phase relation determining apparatus according to an embodiment of the present application.
Illustration of the drawings:
the system comprises a power distribution transformer 1, a controllable voltage source 2, a meter 3 and a voltmeter 4.
Detailed Description
Referring to fig. 1 and 2, an embodiment of the present application provides a method for determining a family, variation, and phase relationship, including:
s1, acquiring a first measurement voltage U at a meter with unknown relation among households, variables and phases;
step S2, adjusting a first output voltage of a controllable voltage source, wherein the controllable voltage source is connected with a neutral point of a distribution transformer which can have a definite relation with unknown household, transformer and phase, and the phase angle of the first output voltage is the same as or opposite to the phase angle A;
step S3, obtaining a second measurement voltage U 'at the meter with the relationship among the unknown household, the unknown phase and the unknown phase'a；
Step S4 of calculating the second measurement voltage U'aA first voltage amplitude difference DeltaU from the first measurement voltage Ua；
△Ua＝U’a-U；
Step S5, if the first voltage amplitude difference DeltaUaIf not, adjusting a second output voltage of the controllable voltage source, wherein the phase angle of the second output voltage is the same as or opposite to that of B;
step S6, obtaining a third measurement voltage U 'at the meter with the relationship among the unknown household, the unknown phase and the unknown phase'b；
Step S7 of calculating the third measurement voltage U'bAnd a second voltage amplitude difference DeltaU of the first measurement voltage Ub；
Step S8, adjusting a third output voltage of the controllable voltage source, wherein the phase angle of the third output voltage is the same as or opposite to that of C;
step S9, obtaining a fourth measurement voltage U 'at the meter with the relationship among the unknown household, the unknown phase and the unknown phase'c；
Step S10 of calculating the fourth measurement voltage U'cAnd a third voltage amplitude difference DeltaU of the first measurement voltage Uc；
Step S11, according to the first voltage amplitude difference DeltaUaSaid second voltage magnitude difference DeltaUbAnd said third voltage magnitude difference DeltaUcDetermining the relation of family, variation and phase;
wherein the first output voltage, the second output voltage and the third output voltage have the same amplitude.
The method provided by the application not only can effectively determine the relationship between the household and the variable, but also can simultaneously determine the phase of the unknown meter. The principle of the method is simple and reliable, and the relation among the family, the transformer and the phase can be effectively solved.
Further, the method further comprises the following steps:
if said first voltage magnitude differs by Δ UaAnd if the value is 0, judging that the meter of which the relation among the household, the transformer and the phase is unknown does not belong to the distribution transformer. S2-S4 are repeated at other possible distribution transformers.
Further, when the phase angle of the first output voltage is in the same direction as A, the phase angle of the second output voltage is in the same direction as B, and the phase angle of the third output voltage is in the same direction as C; said difference Δ U according to the first voltage amplitudeaSecond voltage magnitude difference DeltaUbAnd a third voltage magnitude difference DeltaUcThe step of determining the relationship of the user, the change and the phase comprises the following steps:
if said first voltage magnitude differs by Δ UaGreater than zero, the second voltage magnitude difference Δ UbLess than zero, the third voltage magnitude difference DeltaUcIf the value is less than zero, the meter which determines the relationship among the unknown household, the unknown transformer and the unknown phase is connected with the phase A of the distribution transformer;
if said second voltage magnitude differs by Δ UbGreater than zero, the first voltage magnitude difference Δ UaLess than zero, the third voltage magnitude difference DeltaUcIf the value is less than zero, the meter which determines the relationship among the unknown household, the unknown transformer and the unknown phase is connected with the phase B of the distribution transformer;
if said third voltage magnitude differs by Δ UcGreater than zero, the first voltage magnitude difference Δ UaLess than zero, the second voltage magnitude difference DeltaUbAnd if the value is less than zero, the meter which determines the relationship among the unknown household, the unknown transformer and the unknown phase is connected to the C phase of the distribution transformer.
Further, when the phase angle of the first output voltage is opposite to phase A, the phase angle of the second output voltage is opposite to phase B, and the phase angle of the third output voltage is opposite to phase C; said difference Δ U according to the first voltage amplitudeaSecond voltage magnitude difference DeltaUbAnd a third voltage magnitude difference DeltaUcThe step of determining the relationship of the user, the change and the phase comprises the following steps:
if said first voltage magnitude differs by Δ UaLess than zero, the second voltage magnitude difference DeltaUbGreater than zero, the third voltage magnitude being different by DeltaUcIf the value is larger than zero, the meter which determines the relation among the unknown household, the unknown transformer and the unknown phase is connected with the phase A of the distribution transformer;
if said second voltage magnitude differs by Δ UbLess than zero, the first voltage magnitude difference DeltaUaGreater than zero, the third voltage magnitude being different by DeltaUcIf the value is larger than zero, the meter which determines the relation among the unknown household, the unknown transformer and the unknown phase is connected with the phase B of the distribution transformer;
if said third voltage magnitude differs by Δ UcLess than zero, the first voltage magnitude difference DeltaUaGreater than zero, the second voltage magnitude difference Δ UbAnd if the value is larger than zero, the meter for determining the relation among the unknown household, the unknown transformer and the unknown phase is connected to the C phase of the distribution transformer.
Further, the magnitudes of the first output voltage, the second output voltage and the third output voltage are 5-15V.
Referring to fig. 3, an embodiment of the present application provides a device for determining a relationship between a user, a transformer, and a phase, including:
the first acquisition unit 101 is used for acquiring a first measurement voltage at a meter with unknown relation among households, phase change and phases;
a first regulating unit 102, configured to regulate a first output voltage of a controllable voltage source, the controllable voltage source being connected to a neutral point of a distribution transformer that may have a certain relationship with unknown household, transformer, or phase, and a phase angle of the first output voltage being in the same direction as or opposite to a;
the second obtaining unit 103 is used for obtaining a second measurement voltage at the meter with the unknown relation among the household, the transformer and the phase;
a first calculating unit 104 for calculating a first voltage amplitude difference between the second measured voltage and the first measured voltage;
a second adjusting unit 105, configured to adjust a second output voltage of the controllable voltage source if the first voltage magnitude difference is not 0, where a phase angle of the second output voltage is the same as or opposite to B;
a third obtaining unit 106, configured to obtain a third measurement voltage at the meter with the unknown relationship among the household, the phase, and the phase;
a second calculating unit 107 for calculating a second voltage magnitude difference between the third measured voltage and the first measured voltage;
a third regulating unit 108 for regulating a third output voltage of the controllable voltage source, the phase angle of the third output voltage being in the same direction or in the opposite direction as C;
a fourth obtaining unit 109, configured to obtain a fourth measurement voltage at the meter with the unknown relationship among the household, the phase, and the phase;
a third calculating unit 110 for calculating a third voltage magnitude difference between the fourth measured voltage and the first measured voltage;
a determining unit 111, configured to determine a relationship between a phase and a phase according to the first voltage amplitude difference, the second voltage amplitude difference, and the third voltage amplitude difference;
wherein the first output voltage, the second output voltage and the third output voltage have the same amplitude.
Further, the device also comprises:
and the judging unit is used for judging that the meter with unknown relation among the household, the transformer and the phase does not belong to the distribution transformer if the first voltage amplitude difference is 0.
Further, when the phase angle of the first output voltage is in the same direction as A, the phase angle of the second output voltage is in the same direction as B, and the phase angle of the third output voltage is in the same direction as C; the determining unit 111 is further configured to:
if the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is smaller than zero, and the meter which does not know the relationship among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
Further, when the phase angle of the first output voltage is opposite to phase A, the phase angle of the second output voltage is opposite to phase B, and the phase angle of the third output voltage is opposite to phase C; the determining unit 111 is further configured to:
if the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is larger than zero, and the meter which does not know the relation among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
According to the technical scheme, the embodiment of the application provides a method and a device for determining the relation between a household, a transformer and a phase, wherein the method comprises the steps of obtaining a first measurement voltage at a meter with the relation between the unknown household, the transformer and the phase; adjusting a first output voltage of a controllable voltage source, wherein the controllable voltage source is connected with a neutral point of a distribution transformer which can have a determined relation with unknown household, transformer and phase, and the phase angle of the first output voltage is the same as or opposite to A; acquiring a second measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase; calculating a first voltage magnitude difference between the second measured voltage and the first measured voltage; if the first voltage amplitude difference is not 0, adjusting a second output voltage of the controllable voltage source, wherein the phase angle of the second output voltage is the same as or opposite to that of B; acquiring a third measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase; calculating a second voltage magnitude difference between the third measured voltage and the first measured voltage; adjusting a third output voltage of the controllable voltage source, wherein the phase angle of the third output voltage is the same as or opposite to that of the C; acquiring a fourth measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase; calculating a third voltage magnitude difference between the fourth measured voltage and the first measured voltage; and determining a family, variation and phase relation according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference. The method provided by the application not only can effectively determine the relationship between the household and the variable, but also can simultaneously determine the phase of the unknown meter. The principle of the method is simple and reliable, and the relation among the family, the transformer and the phase can be effectively solved.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (5)
1. A method for determining a family, transformer and phase relationship is characterized by comprising the following steps:
acquiring a first measurement voltage at a meter with unknown relation among households, changes and phases;
adjusting a first output voltage of a controllable voltage source, wherein the controllable voltage source is connected with a neutral point of a distribution transformer which can have a determined relation with unknown household, transformer and phase, and the phase angle of the first output voltage is the same as or opposite to A;
acquiring a second measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase;
calculating a first voltage magnitude difference between the second measured voltage and the first measured voltage;
if the first voltage amplitude difference is not 0, adjusting a second output voltage of the controllable voltage source, wherein the phase angle of the second output voltage is the same as or opposite to that of B;
acquiring a third measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase;
calculating a second voltage magnitude difference between the third measured voltage and the first measured voltage;
adjusting a third output voltage of the controllable voltage source, wherein the phase angle of the third output voltage is the same as or opposite to that of the C;
acquiring a fourth measurement voltage at the meter with the relation of the unknown household, the unknown phase and the unknown phase;
calculating a third voltage magnitude difference between the fourth measured voltage and the first measured voltage;
determining a family, variation and phase relation according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference;
wherein the first output voltage, the second output voltage and the third output voltage have the same amplitude;
when the phase angle of the first output voltage is in the same direction as A, the phase angle of the second output voltage is in the same direction as B, and the phase angle of the third output voltage is in the same direction as C; the step of determining the relationship of the user, the variable and the phase according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference comprises the following steps:
if the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase B of the distribution transformer;
if the third voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the C phase of the distribution transformer;
when the phase angle of the first output voltage is opposite to phase A, the phase angle of the second output voltage is opposite to phase B, and the phase angle of the third output voltage is opposite to phase C; the step of determining the relationship of the user, the variable and the phase according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference comprises the following steps:
if the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is larger than zero, and the meter which does not know the relation among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
2. The method of claim 1, further comprising:
and if the first voltage amplitude difference is 0, judging that the meter without relation among the household, the transformer and the phase does not belong to the distribution transformer.
3. The method of claim 1, wherein the first output voltage, the second output voltage, and the third output voltage have magnitudes of 5-15V.
4. A user, change, and phase relationship determining apparatus, comprising:
the first acquisition unit is used for acquiring a first measurement voltage at a meter with unknown relation among households, phase change and phase;
the first regulating unit is used for regulating a first output voltage of a controllable voltage source, the controllable voltage source is connected with a neutral point of a distribution transformer which can have a determined relation with unknown household, transformer and phase, and the phase angle of the first output voltage is the same as or opposite to that of A;
the second acquisition unit is used for acquiring a second measurement voltage at the meter with the unknown relation among the household, the transformer and the phase;
a first calculation unit for calculating a first voltage amplitude difference between the second measurement voltage and the first measurement voltage;
the second adjusting unit is used for adjusting a second output voltage of the controllable voltage source if the first voltage amplitude difference is not 0, and the phase angle of the second output voltage is the same as or opposite to that of the second output voltage;
the third acquisition unit is used for acquiring a third measurement voltage at the meter with the relationship among the unknown household, the unknown phase and the unknown phase;
a second calculation unit for calculating a second voltage amplitude difference between the third measured voltage and the first measured voltage;
the third regulating unit is used for regulating a third output voltage of the controllable voltage source, and the phase angle of the third output voltage is the same as or opposite to that of the phase angle C;
the fourth acquisition unit is used for acquiring a fourth measurement voltage at the meter with the unknown relation among the household, the transformer and the phase;
a third calculation unit for calculating a third voltage magnitude difference between the fourth measured voltage and the first measured voltage;
the determining unit is used for determining a family, a variation and a phase relation according to the first voltage amplitude difference, the second voltage amplitude difference and the third voltage amplitude difference;
wherein the first output voltage, the second output voltage and the third output voltage have the same amplitude;
when the phase angle of the first output voltage is in the same direction as A, the phase angle of the second output voltage is in the same direction as B, and the phase angle of the third output voltage is in the same direction as C; the determining unit is further configured to:
if the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the third voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the phase B of the distribution transformer;
if the third voltage amplitude difference is larger than zero, the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is smaller than zero, and a meter with unknown relation among household, transformer and phase is connected to the C phase of the distribution transformer;
when the phase angle of the first output voltage is opposite to phase A, the phase angle of the second output voltage is opposite to phase B, and the phase angle of the third output voltage is opposite to phase C; the determining unit is further configured to:
if the first voltage amplitude difference is smaller than zero, the second voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase A of the distribution transformer;
if the second voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the third voltage amplitude difference is larger than zero, and a meter which does not know the relation among the household, the transformer and the phase is connected to the phase B of the distribution transformer;
and if the third voltage amplitude difference is smaller than zero, the first voltage amplitude difference is larger than zero, the second voltage amplitude difference is larger than zero, and the meter which does not know the relation among the household, the transformer and the phase is connected to the C phase of the distribution transformer.
5. The apparatus of claim 4, further comprising:
and the judging unit is used for judging that the meter with unknown relation among the household, the transformer and the phase does not belong to the distribution transformer if the first voltage amplitude difference is 0.
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