CN112379177A - Method and system for determining low-voltage line loss and electric energy meter operation error of transformer area - Google Patents

Method and system for determining low-voltage line loss and electric energy meter operation error of transformer area Download PDF

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Publication number
CN112379177A
CN112379177A CN202110059440.4A CN202110059440A CN112379177A CN 112379177 A CN112379177 A CN 112379177A CN 202110059440 A CN202110059440 A CN 202110059440A CN 112379177 A CN112379177 A CN 112379177A
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metering
sub
area
user
data
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Inventor
陈昊
张密
刘婧
林繁涛
于海波
周晖
彭楚宁
王齐
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
    • G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

The invention provides a method and a system for determining the loss of a low-voltage line in a transformer area and the running error of an electric energy meter, wherein the method and the system are based on tree topology and a general mathematical relation of the transformer area, a transformer area low-voltage line loss model is established by utilizing kirchhoff's law, an electric energy meter running error mathematical model is established according to an energy conservation law, collected power supply data of a total meter and frozen power consumption data of a sub-meter are substituted into the running error mathematical model to obtain a set of equations, the equivalent resistance of each branch in the transformer area and the calculation error of each metering point are determined by solving the set of equations, and the loss of the low-voltage line and the running error of each metering point are determined according to the equivalent resistance and the calculation error of the branch. According to the method and the system, the real power topology of the transformer area is not required to be known, the main power supply table and the sub-power supply table of the transformer area, the power supply quantity of the main power supply table of the transformer area and the freezing power consumption quantity of the sub-power supply table are only required to be known, the accurate values of the low-voltage line loss and the fixed loss of the transformer area can be obtained by utilizing the big data, the operation is simple, and the efficiency is extremely high.

Description

Method and system for determining low-voltage line loss and electric energy meter operation error of transformer area
Technical Field
The present invention relates to the field of power data analysis, and more particularly, to a method and system for determining transformer bay low voltage line loss and power meter operating errors.
Background
The traditional method for calibrating the metering error of the electric energy meter is to compare the electric energy meter to be calibrated with a standard device with higher accuracy grade to obtain the error of the electric energy meter. Comparing a typical high accuracy grade electric energy meter as in a laboratory to calibrate a low accuracy grade electric energy meter; and in the running process of the electric energy meter, comparing the metering difference between the electric energy meter and the on-site calibration instrument in the same period of time by adopting the on-site calibration instrument with higher accuracy to obtain the running error of the electric energy meter.
The traditional method is mainly used for carrying out on-site verification or dismantling laboratory verification on the intelligent electric energy meter installed and transported, and has the following problems:
(1) the efficiency is low and the workload is large;
(2) various problems of the intelligent electric energy meter are difficult to find in time;
(3) the intelligent electric energy meter cannot be operated in full.
In the method for researching and calculating the loss of the low-voltage line of the transformer area and the operation errors of the intelligent electric energy meters under the transformer area by taking the transformer area as a unit through a big data technology in the prior art, the loss rate of the low-voltage line of the transformer area in an observation time period is taken as a fixed value, which is actually inconsistent with the operation of the transformer area, so that the calculated operation errors of the metering points are inaccurate.
Disclosure of Invention
In order to solve the technical problem that when the operation error of a metering point is calculated by using the law of conservation of energy in the prior art, the loss rate of a low-voltage line is used as a fixed value, so that the calculated operation error of the metering point is inaccurate, the invention provides a method for determining the loss of the low-voltage line of a distribution room and the operation error of an electric energy meter, which comprises the following steps:
collecting the archive information of the table area general table and the user sub-table, and collecting according to the archive information
Figure DEST_PATH_IMAGE001
A period of equal time
Figure DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure DEST_PATH_IMAGE003
Freezing electricity consumption data of metering points of the individual users in a sub-metering mode;
generating a low-voltage line loss model and an electric energy meter operation error mathematical model according to the total meter power supply quantity data, the freezing power consumption quantity data, the pre-established low-voltage line loss model and the pre-established electric energy meter operation error mathematical model
Figure 863978DEST_PATH_IMAGE001
A system of equations;
solving includes the
Figure 533994DEST_PATH_IMAGE001
A system of equations defining said region
Figure 648580DEST_PATH_IMAGE003
Calculating errors of sub-metering points of each user and equivalent resistance of each branch of the transformer area;
according to the station area
Figure 163875DEST_PATH_IMAGE003
The calculation error of the metering point of each user sub-meter, the equivalent resistance of each branch of the distribution area, and the distribution area
Figure 680307DEST_PATH_IMAGE003
Individual subscriber sub-meter measurement point voltage and power factor, and pre-established low voltage line loss model determination
Figure 521224DEST_PATH_IMAGE001
A period of equal time
Figure 624572DEST_PATH_IMAGE002
The line loss of (1); and according to said station area
Figure 209137DEST_PATH_IMAGE003
Determining the area according to the calculation error of the sub-metering point of each user
Figure 580075DEST_PATH_IMAGE003
And (4) dividing the running error of the metering point by each user.
Further, before acquiring archive information of the distribution area general table and the user sub-tables, the method further comprises the following steps:
establishing a transformer area low-voltage line loss model by using kirchhoff's law, wherein the calculation formula is as follows:
Figure DEST_PATH_IMAGE005
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE006
is the equivalent resistance of each branch of the platform area,
Figure DEST_PATH_IMAGE007
and
Figure DEST_PATH_IMAGE008
is the first stage of the platform
Figure DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 277379DEST_PATH_IMAGE002
The freezing electricity consumption of the electric power source,
Figure DEST_PATH_IMAGE011
and
Figure DEST_PATH_IMAGE012
is the first stage of the platform
Figure 163296DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 285973DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 511418DEST_PATH_IMAGE002
The error in the calculation of (a) is,
Figure DEST_PATH_IMAGE013
and
Figure DEST_PATH_IMAGE014
is the first stage of the platform
Figure 992340DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 568815DEST_PATH_IMAGE010
the individual users divide the meter into the voltage of the metering point,
Figure DEST_PATH_IMAGE015
and
Figure DEST_PATH_IMAGE016
is the first stage of the platform
Figure 557499DEST_PATH_IMAGE009
Metering points and users are divided into metering points and
Figure 371871DEST_PATH_IMAGE010
the power factor of each user sub-metering point is measured by each user,
Figure 991072DEST_PATH_IMAGE003
is the number of metering points of the subscriber sub-table of the station area,
Figure DEST_PATH_IMAGE017
,
Figure DEST_PATH_IMAGE018
;
according to the law of conservation of energy, an electric energy meter operation error mathematical model is established based on the established transformer area low-voltage line loss model, and the calculation formula is as follows:
Figure DEST_PATH_IMAGE019
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE020
is the amount of power supplied to the station area summary table,
Figure DEST_PATH_IMAGE021
is the said platform area
Figure 678011DEST_PATH_IMAGE003
The freezing electricity consumption sum of the metering points is divided into the metering points by each metering point and each user,
Figure DEST_PATH_IMAGE022
is the statistical line loss of the distribution room,
Figure DEST_PATH_IMAGE023
is the low voltage line loss of the station area,
Figure DEST_PATH_IMAGE024
is the fixed loss of the station area,
Figure DEST_PATH_IMAGE025
is of said area
Figure 768589DEST_PATH_IMAGE003
The electric energy loss caused by the metering error of each metering point and each user sub-metering point,
Figure DEST_PATH_IMAGE026
。
further, collecting the archive information of the distribution area general table and the user sub-tables comprises the following steps:
acquiring archive information of a district general table and user sub-tables through a marketing business application system;
collecting according to the archive information
Figure 234206DEST_PATH_IMAGE001
A period of time
Figure 758728DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 778637DEST_PATH_IMAGE003
The frozen power consumption data of the metering points of the individual users comprise:
collecting through a power consumption information collecting system according to the archive information
Figure 312386DEST_PATH_IMAGE001
A period of equal time
Figure 101351DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 796774DEST_PATH_IMAGE003
And (4) metering the frozen power consumption data of the metering points by each user.
Further, collecting the information according to the archive
Figure 569558DEST_PATH_IMAGE001
A period of time
Figure 375840DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 783426DEST_PATH_IMAGE003
After freezing the electricity consumption data of the metering points of the individual users, the method also comprises the following steps:
and carrying out data cleaning on the collected electric quantity data of the summary table and the frozen electric quantity data, and removing data with missing items, data with wrong archive information and data with abnormal judgment in the data.
Further, the station area is determined according to the station area
Figure 915330DEST_PATH_IMAGE003
Determining the area according to the calculation error of the sub-metering point of each user
Figure 644251DEST_PATH_IMAGE003
The calculation formula of the operation error of the metering point of each user is as follows:
Figure DEST_PATH_IMAGE027
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE028
is the station area
Figure 847699DEST_PATH_IMAGE009
The individual users can measure the running error of the metering point,
Figure 876835DEST_PATH_IMAGE011
is the station area
Figure 648482DEST_PATH_IMAGE009
The calculation error of the metering point is divided into the sub-metering points of each user,
Figure 395858DEST_PATH_IMAGE017
。
according to another aspect of the present invention, there is provided a system for determining a station area low voltage line loss and an electric energy meter operation error, the system comprising:
a data acquisition unit for acquiring the file information of the distribution area general table and the user sub-table and acquiring the file information according to the file information
Figure 310987DEST_PATH_IMAGE001
A period of equal time
Figure 929050DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 137178DEST_PATH_IMAGE003
Freezing electricity consumption data of metering points of the individual users in a sub-metering mode;
the system of equations unit is used for generating a system of equations according to the total meter power supply quantity data and the frozen power consumption quantity data, and a pre-established low-voltage line loss model and an electric energy meter operation error mathematical model
Figure 106271DEST_PATH_IMAGE001
A system of equations;
a first computing unit for solving for a solution comprising the
Figure 58046DEST_PATH_IMAGE001
A system of equations defining said region
Figure 796195DEST_PATH_IMAGE003
Calculating errors of sub-metering points of each user and equivalent resistance of each branch of the transformer area;
a second calculation unit for calculating a second calculation result according to the region
Figure 175224DEST_PATH_IMAGE003
The calculation error of the metering point of each user sub-meter, the equivalent resistance of each branch of the distribution area, and the distribution area
Figure 631613DEST_PATH_IMAGE003
Individual subscriber sub-meter measurement point voltage and power factor, and pre-established low voltage line loss model determination
Figure 387079DEST_PATH_IMAGE001
A period of equal time
Figure 979735DEST_PATH_IMAGE002
The line loss of (1); and according to said station area
Figure 293779DEST_PATH_IMAGE003
Determining the area according to the calculation error of the sub-metering point of each user
Figure 971885DEST_PATH_IMAGE003
And (4) dividing the running error of the metering point by each user.
Further, the system further comprises:
the first model unit is used for establishing a transformer area low-voltage line loss model by utilizing kirchhoff law, and the calculation formula is as follows:
Figure DEST_PATH_IMAGE029
in the formula (I), the compound is shown in the specification,
Figure 62201DEST_PATH_IMAGE006
is the equivalent resistance of each branch of the platform area,
Figure 774942DEST_PATH_IMAGE007
and
Figure 761352DEST_PATH_IMAGE008
is the first stage of the platform
Figure 192334DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 289603DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 92736DEST_PATH_IMAGE002
The freezing electricity consumption of the electric power source,
Figure 250048DEST_PATH_IMAGE011
and
Figure 902746DEST_PATH_IMAGE012
is the first stage of the platform
Figure 803706DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 225460DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 553673DEST_PATH_IMAGE002
The error in the calculation of (a) is,
Figure 428088DEST_PATH_IMAGE013
and
Figure 867160DEST_PATH_IMAGE014
is the first stage of the platform
Figure 409000DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 406649DEST_PATH_IMAGE010
the individual users divide the meter into the voltage of the metering point,
Figure 33940DEST_PATH_IMAGE015
and
Figure 276702DEST_PATH_IMAGE016
is the first stage of the platform
Figure 673048DEST_PATH_IMAGE009
Metering points and users are divided into metering points and
Figure 343064DEST_PATH_IMAGE010
the power factor of each user sub-metering point is measured by each user,
Figure 926492DEST_PATH_IMAGE003
is the number of metering points of the subscriber sub-table of the station area,
Figure 972946DEST_PATH_IMAGE017
,
Figure 223798DEST_PATH_IMAGE018
;
the second model unit is used for establishing an electric energy meter operation error mathematical model based on the established transformer area low-voltage line loss model according to the energy conservation law, and the calculation formula is as follows:
Figure 64716DEST_PATH_IMAGE019
in the formula (I), the compound is shown in the specification,
Figure 135440DEST_PATH_IMAGE020
is the amount of power supplied to the station area summary table,
Figure 221470DEST_PATH_IMAGE021
is the said platform area
Figure 326829DEST_PATH_IMAGE003
The freezing electricity consumption sum of the metering points is divided into the metering points by each metering point and each user,
Figure 73068DEST_PATH_IMAGE022
is the statistical line loss of the distribution room,
Figure 162247DEST_PATH_IMAGE023
is the low voltage line loss of the station area,
Figure 284924DEST_PATH_IMAGE024
is the fixed loss of the station area,
Figure 510369DEST_PATH_IMAGE025
is of said area
Figure 693088DEST_PATH_IMAGE003
The electric energy loss caused by the metering error of each metering point and each user sub-metering point,
Figure 738405DEST_PATH_IMAGE026
。
furthermore, the data acquisition unit acquires the file information of the district general table and the user sub-tables through the marketing business application system and acquires the file information through the power utilization information acquisition system according to the file information
Figure 664772DEST_PATH_IMAGE001
A period of equal time
Figure 744724DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 98345DEST_PATH_IMAGE003
And (4) metering the frozen power consumption data of the metering points by each user.
Further, the system also comprises a data processing unit, which is used for carrying out data cleaning on the collected electric quantity data of the summary table and the frozen electric quantity data, and removing data with missing items, data with wrong archive information and data with abnormal judgment in the data.
Further, the second calculation unit calculates a second calculation result according to the distribution area
Figure 129492DEST_PATH_IMAGE003
Determining the area according to the calculation error of the sub-metering point of each user
Figure 859551DEST_PATH_IMAGE003
The calculation formula of the operation error of the metering point of each user is as follows:
Figure 794009DEST_PATH_IMAGE027
in the formula (I), the compound is shown in the specification,
Figure 318531DEST_PATH_IMAGE028
is the station area
Figure 338440DEST_PATH_IMAGE009
The individual users can measure the running error of the metering point,
Figure 872189DEST_PATH_IMAGE011
is the station area
Figure 661154DEST_PATH_IMAGE009
The calculation error of the metering point is divided into the sub-metering points of each user,
Figure 356577DEST_PATH_IMAGE017
。
the method and the system for determining the loss of the low-voltage line of the transformer area and the running error of the electric energy meter are based on the tree topology and the total-branch mathematical relationship of the transformer area, a transformer area low-voltage line loss model is established by utilizing the kirchhoff law, an electric energy meter running error mathematical model is established according to the energy conservation law, then the collected power supply data of the total meter and the frozen power consumption data of the branch meter are substituted into the running error mathematical model to obtain a set of equations, the equivalent resistance of each branch of the transformer area is determined by solving the set of equations, the calculation error of each calculation point is determined, and the loss of the low-voltage line and the running error of each metering point are determined according to the determined equivalent resistance of the branch. According to the method and the system, the real power topology of the transformer area is not required to be known, the accurate values of the low-voltage line loss and the fixed loss of the transformer area can be obtained by using the big data only by knowing the main power consumption data and the sub-power consumption data of the transformer area, and the running errors of the intelligent electric energy meters under the transformer area are obtained in batches by taking the transformer area as a unit.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a flow chart of a method of determining a loss of a low voltage line and an operation error of an electric energy meter in a distribution room according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a platform circuit topology used to derive a platform low voltage line loss model;
FIG. 3 is a schematic diagram of a platform topology according to a preferred embodiment of the present invention;
fig. 4 is a schematic diagram of a system for determining station area low voltage line loss and power meter operation error according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a method for determining a station area low voltage line loss and an electric energy meter operation error according to a preferred embodiment of the present invention. As shown in fig. 1, the method 100 for determining the station area low voltage line loss and the power meter operation error according to the preferred embodiment starts with step 101.
In step 101, a transformer area low-voltage line loss model is established by using kirchhoff's law, and the calculation formula is as follows:
Figure DEST_PATH_IMAGE030
in the formula (I), the compound is shown in the specification,
Figure 427564DEST_PATH_IMAGE006
is the equivalent resistance of each branch of the platform area,
Figure 233846DEST_PATH_IMAGE007
and
Figure 877317DEST_PATH_IMAGE008
is the first stage of the platform
Figure 9221DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 3722DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 613694DEST_PATH_IMAGE002
The freezing electricity consumption of the electric power source,
Figure 377251DEST_PATH_IMAGE011
and
Figure 414477DEST_PATH_IMAGE012
is the first stage of the platform
Figure 896274DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 44359DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 928001DEST_PATH_IMAGE002
The error in the calculation of (a) is,
Figure 900243DEST_PATH_IMAGE013
and
Figure 603757DEST_PATH_IMAGE014
is the first stage of the platform
Figure 821111DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 293681DEST_PATH_IMAGE010
the individual users divide the meter into the voltage of the metering point,
Figure 938289DEST_PATH_IMAGE015
and
Figure 129099DEST_PATH_IMAGE016
is the first stage of the platform
Figure 884565DEST_PATH_IMAGE009
Metering points and users are divided into metering points and
Figure 477221DEST_PATH_IMAGE010
the power factor of each user sub-metering point is measured by each user,
Figure 27151DEST_PATH_IMAGE003
is the number of metering points of the subscriber sub-table of the station area,
Figure 705257DEST_PATH_IMAGE017
,
Figure 765879DEST_PATH_IMAGE018
. Said period of time
Figure 213041DEST_PATH_IMAGE002
Usually means 1 dayAt 24 hours, the voltage at the measuring point is normally 220V, and the power factor at the measuring point is 1.
Fig. 2 is a schematic diagram of a zone circuit topology for deriving a zone low voltage line loss model. As shown in fig. 2, the current relationship of each branch has been marked in the circuit according to kirchhoff's law, wherein the current passing through branch 1 is
Figure DEST_PATH_IMAGE031
The current through branch 2 is
Figure 100002_DEST_PATH_IMAGE032
The current through branch 3 is
Figure 100002_DEST_PATH_IMAGE033
The current through branches 2 and 3 is
Figure DEST_PATH_IMAGE034
The current through the branches 1, 2, 3 is
Figure DEST_PATH_IMAGE035
Assuming that all the users in the platform area are resistive loads, R represents the resistance on the line, wherein the equivalent resistance of the branch 1 is
Figure DEST_PATH_IMAGE036
The equivalent resistance of branch 2 is
Figure DEST_PATH_IMAGE037
The equivalent resistance of branch 3 is
Figure DEST_PATH_IMAGE038
The equivalent resistance of the line comprising branches 2 and 3 is
Figure DEST_PATH_IMAGE039
The equivalent resistance of the line comprising branches 1, 2, 3 is
Figure DEST_PATH_IMAGE040
The voltage input value of the platform area is
Figure DEST_PATH_IMAGE041
The voltage output value of branch 1 is
Figure DEST_PATH_IMAGE042
The voltage output of branch 2 is
Figure DEST_PATH_IMAGE043
The voltage output of branch 3 is
Figure DEST_PATH_IMAGE044
If the low-voltage line loss LL generated in the distribution area in the time period t is:
Figure DEST_PATH_IMAGE046
real electricity consumption using user meter
Figure DEST_PATH_IMAGE047
Divided by (voltage)
Figure DEST_PATH_IMAGE048
Power factor
Figure DEST_PATH_IMAGE049
Time of change
Figure DEST_PATH_IMAGE050
) To estimate the current
Figure DEST_PATH_IMAGE051
，
Figure DEST_PATH_IMAGE052
，
Figure DEST_PATH_IMAGE053
The equivalent resistance of the common line representing the branch j and the branch k of the transformer area is a undetermined constant. Then generalizing to have
Figure DEST_PATH_IMAGE054
The individual subscriber is divided into zones of metering points and time periods
Figure 111637DEST_PATH_IMAGE050
Should have a low voltage line loss of
Figure DEST_PATH_IMAGE055
Because of the real power consumption of the user
Figure 542618DEST_PATH_IMAGE047
Cannot be obtained, so by introducing calculation errors
Figure 138422DEST_PATH_IMAGE056
Using the time period of the user
Figure 705670DEST_PATH_IMAGE050
Freezing power consumption
Figure DEST_PATH_IMAGE057
To represent the actual power usage of the user
Figure 394140DEST_PATH_IMAGE047
I.e. by
Figure DEST_PATH_IMAGE058
The low-voltage line loss LL of the final stage area is expressed by the following relation:
Figure DEST_PATH_IMAGE059
in the formula (I), the compound is shown in the specification,
Figure 109155DEST_PATH_IMAGE053
the equivalent resistance of the common line representing the branch j and the branch k of the transformer area is a undetermined constant. Once the power supply topology of the cell is determined, the resistances throughout the legs of the cell are already determinedAnd the method is determined, so that the method is reasonable to establish an equation system by taking the determined constant as a undetermined constant to solve. The information such as the real power supply topology of the transformer area does not need to be measured in the traditional transformer area loss rate method.
According to the law of conservation of energy, an electric energy meter operation error mathematical model is established based on the established transformer area low-voltage line loss model, and the calculation formula is as follows:
Figure 10115DEST_PATH_IMAGE019
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE060
is the amount of power supplied to the station area summary table,
Figure DEST_PATH_IMAGE061
is the said platform area
Figure DEST_PATH_IMAGE062
The freezing electricity consumption sum of the metering points is divided into the metering points by each metering point and each user,
Figure DEST_PATH_IMAGE063
is the statistical line loss of the distribution room,
Figure DEST_PATH_IMAGE064
is the low voltage line loss of the station area,
Figure DEST_PATH_IMAGE065
is the fixed loss of the station area,
Figure DEST_PATH_IMAGE066
is of said area
Figure 651443DEST_PATH_IMAGE062
The electric energy loss caused by the metering error of each metering point and each user sub-metering point,
Figure DEST_PATH_IMAGE067
。
fig. 3 is a schematic diagram of a topology of a station area according to a preferred embodiment of the present invention. As shown in fig. 3, a distribution area generally refers to a transformer-powered area, and a summary table provides energy input for a plurality of user meters under the distribution area. Then the statistical line loss tl (total lose) of the region goes to total 3 classes according to the law of conservation of energy: the loss of the low-voltage line in the region ll (line loss), the fixed loss of the region fl (fixed loss), and the power loss el (error loss) generated by the sub-meter error of each user in the region, i.e. the loss of the low-voltage line in the region ll (line loss), the fixed loss of the region fl (fixed loss), and the power loss el (error loss) generated by the sub-meter error of
Figure DEST_PATH_IMAGE068
。
Since the three types of metering losses of the platform area are supported by completely different physical principles, wherein the platform area is fixed in loss
Figure DEST_PATH_IMAGE070
The fixed loss is caused by the energy consumption of the electric energy meter, and the like, does not change along with the change of the power consumption of a user, and is a constant value; the metering loss caused by the operation error of the electric energy meter is in a linear relation with the power consumption, namely if the operation error of a certain sub-meter is a percent and the real power consumption is X, the metering loss caused by the operation error of the electric energy meter of the sub-meter is X X a percent and is in a linear relation; the relation between the low-voltage line loss and the power consumption of the transformer area can utilize a model for estimating the low-voltage line loss of the transformer area by utilizing kirchhoff law:
Figure 337246DEST_PATH_IMAGE055
。
thus, based on expressions
Figure 211661DEST_PATH_IMAGE068
For the power supply quantity of the station area general table being y, the freezing power consumption quantity of the jth user sub-table metering point being y
Figure DEST_PATH_IMAGE071
Calculating an error of
Figure DEST_PATH_IMAGE072
The distribution area with P user sub-table metering points is established, and the equation expression of the statistical line loss is as follows:
Figure 447471DEST_PATH_IMAGE019
the left side of the above equation is statistical line loss TL, the first term on the right side is low-voltage line loss LL, the second term is fixed loss FL, and the third term is metering loss EL caused by errors of the electric energy meter. Then, accumulating the power supply quantity data of the total table of the station areas and the freezing power consumption quantity data of the sub-tables of the users in N equal time periods t, establishing an equation set consisting of N equations, and solving the equation set to obtain the estimation of the error of the electric energy meter, the loss of the low-voltage line and the fixed loss.
In step 102, collecting the archive information of the table area general table and the user sub-table, and collecting the archive information according to the archive information
Figure DEST_PATH_IMAGE073
A period of equal time
Figure 254890DEST_PATH_IMAGE074
Station area summary table power supply amount data and said station area
Figure 521048DEST_PATH_IMAGE062
And (4) metering the frozen power consumption data of the metering points by each user.
At step 103, the collected data is processed
Figure DEST_PATH_IMAGE075
A period of time
Figure 945076DEST_PATH_IMAGE076
The power supply quantity data of the total table of the transformer area and the freezing power consumption data of the sub-tables are subjected to data cleaning, the data with missing items, the data with wrong archive information and the data with abnormal judgment in the data are removed, and the data are generated
Figure 922260DEST_PATH_IMAGE075
A period of equal time
Figure 318606DEST_PATH_IMAGE076
The data of the total table power supply quantity and the data of the sub-table frozen power consumption quantity of the effective station area;
in step 104, generating a total power supply data and a frozen power consumption data according to the total power supply data and the frozen power consumption data, and a pre-established low-voltage line loss model and an electric energy meter operation error mathematical model
Figure 723042DEST_PATH_IMAGE075
A system of equations;
at step 105, solving includes
Figure 837629DEST_PATH_IMAGE075
A system of equations defining said region
Figure 618503DEST_PATH_IMAGE062
Calculating errors of sub-metering points of each user and equivalent resistance of each branch of the transformer area;
in step 106, according to the station area
Figure 367891DEST_PATH_IMAGE062
The calculation error of the metering point of each user sub-meter, the equivalent resistance of each branch of the distribution area, and the distribution area
Figure 208808DEST_PATH_IMAGE062
Individual subscriber sub-meter measurement point voltage and power factor, and pre-established low voltage line loss model determination
Figure 545111DEST_PATH_IMAGE073
A period of equal time
Figure 129677DEST_PATH_IMAGE074
The line loss of (1); and according to said station area
Figure 235036DEST_PATH_IMAGE062
Determining the area according to the calculation error of the sub-metering point of each user
Figure 981275DEST_PATH_IMAGE062
And (4) dividing the running error of the metering point by each user.
Preferably, the acquiring archive information of the distribution area summary table and the user sub-table includes:
acquiring archive information of a district general table and user sub-tables through a marketing business application system;
collecting according to the archive information
Figure 70454DEST_PATH_IMAGE073
A period of time
Figure 927551DEST_PATH_IMAGE074
Station area summary table power supply amount data and said station area
Figure 152996DEST_PATH_IMAGE062
The frozen power consumption data of the metering points of the individual users comprise:
collecting through a power consumption information collecting system according to the archive information
Figure 335716DEST_PATH_IMAGE073
A period of equal time
Figure 646612DEST_PATH_IMAGE074
Station area summary table power supply amount data and said station area
Figure 808865DEST_PATH_IMAGE062
And (4) metering the frozen power consumption data of the metering points by each user.
Preferably, said station area is selected according to said station area
Figure 154396DEST_PATH_IMAGE062
Determining the area according to the calculation error of the sub-metering point of each user
Figure 242437DEST_PATH_IMAGE062
The calculation formula of the operation error of the metering point of each user is as follows:
Figure 40629DEST_PATH_IMAGE027
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE077
is the station area
Figure DEST_PATH_IMAGE078
The individual users can measure the running error of the metering point,
Figure DEST_PATH_IMAGE079
is the station area
Figure 98584DEST_PATH_IMAGE078
The calculation error of the metering point is divided into the sub-metering points of each user,
Figure DEST_PATH_IMAGE080
。
fig. 4 is a schematic diagram of a system for determining station area low voltage line loss and power meter operation error according to a preferred embodiment of the present invention. As shown in fig. 4, the system 400 for determining the loss of the low-voltage line and the operation error of the electric energy meter in the station area according to the preferred embodiment includes:
the first model unit 401 is configured to establish a transformer area low-voltage line loss model by using kirchhoff's law, and a calculation formula of the model unit is as follows:
Figure DEST_PATH_IMAGE081
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE082
is the equivalent resistance of each branch of the platform area,
Figure DEST_PATH_IMAGE083
and
Figure DEST_PATH_IMAGE084
is the first stage of the platform
Figure DEST_PATH_IMAGE085
Individual user sub-metering point and
Figure DEST_PATH_IMAGE086
each user sub-metering point in equal time period
Figure 312003DEST_PATH_IMAGE074
The freezing electricity consumption of the electric power source,
Figure DEST_PATH_IMAGE087
and
Figure DEST_PATH_IMAGE088
is the first stage of the platform
Figure 869148DEST_PATH_IMAGE085
Individual user sub-metering point and
Figure 154636DEST_PATH_IMAGE086
each user sub-metering point in equal time period
Figure 422807DEST_PATH_IMAGE074
The error in the calculation of (a) is,
Figure DEST_PATH_IMAGE089
and
Figure DEST_PATH_IMAGE090
is the first stage of the platform
Figure 539667DEST_PATH_IMAGE085
Individual user sub-metering point and
Figure 235091DEST_PATH_IMAGE086
the individual users divide the meter into the voltage of the metering point,
Figure DEST_PATH_IMAGE091
and
Figure DEST_PATH_IMAGE092
is the first stage of the platform
Figure 303147DEST_PATH_IMAGE085
Metering points and users are divided into metering points and
Figure 109429DEST_PATH_IMAGE086
the power factor of each user sub-metering point is measured by each user,
Figure 18480DEST_PATH_IMAGE062
is the number of metering points of the subscriber sub-table of the station area,
Figure DEST_PATH_IMAGE093
,
Figure DEST_PATH_IMAGE094
;
a second model unit 402, configured to build an electric energy meter operation error mathematical model based on the established transformer area low-voltage line loss model according to the law of conservation of energy, where a calculation formula is as follows:
Figure 681542DEST_PATH_IMAGE019
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE095
is the amount of power supplied to the station area summary table,
Figure 207201DEST_PATH_IMAGE061
is the said platform area
Figure 318639DEST_PATH_IMAGE062
The freezing electricity consumption sum of the metering points is divided into the metering points by each metering point and each user,
Figure 82196DEST_PATH_IMAGE063
is the statistical line loss of the distribution room,
Figure 385001DEST_PATH_IMAGE064
is the low voltage line loss of the station area,
Figure 601219DEST_PATH_IMAGE065
is the fixed loss of the station area,
Figure 14883DEST_PATH_IMAGE066
is of said area
Figure 898525DEST_PATH_IMAGE062
The electric energy loss caused by the metering error of each metering point and each user sub-metering point,
Figure 106652DEST_PATH_IMAGE067
。
a data collecting unit 403 for collecting the archive information of the district summary table and the user sub-tables and collecting the archive information according to the archive information
Figure 75745DEST_PATH_IMAGE073
A period of equal time
Figure 761942DEST_PATH_IMAGE074
Station area summary table power supply amount data and said station area
Figure 765670DEST_PATH_IMAGE062
Freezing electricity consumption data of metering points of the individual users in a sub-metering mode;
a data processing unit 404, configured to perform data cleaning on the summary table power supply amount and the frozen power consumption amount data, remove data with missing items, data with wrong archive information, and data with abnormal judgment in the data, and generate
Figure 144699DEST_PATH_IMAGE073
A period of equal time
Figure 99623DEST_PATH_IMAGE074
The data of the power supply quantity and the data of the frozen power consumption quantity of the effective station area general table;
an equation set unit 405 for generating a mathematical model containing the data of the power supply amount and the frozen power consumption amount of the total table of the effective station areas, and a pre-established low-voltage line loss model and an electric energy meter operation error
Figure 589510DEST_PATH_IMAGE073
A system of equations;
a first calculation unit 406 for solving for a solution comprising said
Figure 182165DEST_PATH_IMAGE073
A system of equations defining said region
Figure 732095DEST_PATH_IMAGE062
Calculating errors of sub-metering points of each user and equivalent resistance of each branch of the transformer area;
a second calculation unit 407 for calculating a second calculation result according to the station area
Figure 675781DEST_PATH_IMAGE062
The calculation error of the metering point of each user sub-meter, the equivalent resistance of each branch of the distribution area, and the distribution area
Figure 969359DEST_PATH_IMAGE062
Individual subscriber sub-meter measurement point voltage and power factor, and pre-established low voltage line loss model determination
Figure 682100DEST_PATH_IMAGE073
A period of equal time
Figure 137352DEST_PATH_IMAGE074
The line loss of (1); and according to said station area
Figure 568333DEST_PATH_IMAGE062
Individual user sub-metering pointsDetermining the station area by calculating error
Figure 400023DEST_PATH_IMAGE062
And (4) dividing the running error of the metering point by each user.
Preferably, the data collecting unit 403 collects archive information of the district general table and the user sub-table through the marketing service application system, and collects the archive information through the electricity consumption information collecting system according to the archive information
Figure 734315DEST_PATH_IMAGE073
A period of equal time
Figure 360468DEST_PATH_IMAGE074
Station area summary table power supply amount data and said station area
Figure 278745DEST_PATH_IMAGE062
And (4) metering the frozen power consumption data of the metering points by each user.
Preferably, the second calculation unit 407 is based on the station area
Figure 179705DEST_PATH_IMAGE062
Determining the area according to the calculation error of the sub-metering point of each user
Figure 601459DEST_PATH_IMAGE062
The calculation formula of the operation error of the metering point of each user is as follows:
Figure 929673DEST_PATH_IMAGE027
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE096
is the station area
Figure 335246DEST_PATH_IMAGE085
The individual users can measure the running error of the metering point,
Figure 39897DEST_PATH_IMAGE087
is the station area
Figure 316158DEST_PATH_IMAGE085
The calculation error of the metering point is divided into the sub-metering points of each user,
Figure 313807DEST_PATH_IMAGE093
。
the system for determining the loss of the low-voltage line of the transformer area and the running error of the electric energy meter acquires the power supply quantity of a total transformer area and the freezing power consumption quantity of sub-transformers, and the steps of calculating the loss model of the low-voltage line of the transformer area and the calculation error and the running error of each metering point according to the pre-established mathematical models of the loss model of the low-voltage line and the running error of the electric energy meter are the same as the steps adopted by the method for determining the loss of the low-voltage line of the transformer area and the running error of the electric energy meter, and the technical effects are the same and are not repeated herein.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (10)

1. A method for determining district low voltage line loss and power meter operating errors, the method comprising:
collecting the archive information of the table area general table and the user sub-table, and collecting according to the archive information
Figure 709515DEST_PATH_IMAGE001
A period of equal time
Figure 157814DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 468709DEST_PATH_IMAGE003
Freezing electricity consumption data of metering points of the individual users in a sub-metering mode;
generating a low-voltage line loss model and an electric energy meter operation error mathematical model according to the total meter power supply quantity data, the freezing power consumption quantity data, the pre-established low-voltage line loss model and the pre-established electric energy meter operation error mathematical model
Figure 129498DEST_PATH_IMAGE001
A system of equations;
solving includes the
Figure 475028DEST_PATH_IMAGE001
A system of equations defining said region
Figure 828649DEST_PATH_IMAGE003
Calculating errors of sub-metering points of each user and equivalent resistance of each branch of the transformer area;
according to the station area
Figure 626841DEST_PATH_IMAGE003
Calculation error of individual user sub-metering point, each branch of the station areaThe equivalent resistance of, the said mesa region
Figure 858365DEST_PATH_IMAGE003
The voltage and power factor of the metering point of each user sub-meter and the pre-established low-voltage line loss model are determined
Figure 792823DEST_PATH_IMAGE001
A period of equal time
Figure 317345DEST_PATH_IMAGE002
The line loss of (1); and according to said station area
Figure 337253DEST_PATH_IMAGE003
Determining the area according to the calculation error of the sub-metering point of each user
Figure 605424DEST_PATH_IMAGE003
And (4) dividing the running error of the metering point by each user.
2. The method of claim 1, wherein before collecting the profile information of the distribution area summary table and the subscriber sub-table, the method further comprises:
establishing a transformer area low-voltage line loss model by using kirchhoff's law, wherein the calculation formula is as follows:
Figure 659967DEST_PATH_IMAGE005
in the formula (I), the compound is shown in the specification,
Figure 620970DEST_PATH_IMAGE006
is the equivalent resistance of each branch of the platform area,
Figure 393754DEST_PATH_IMAGE007
and
Figure 200036DEST_PATH_IMAGE008
is the first stage of the platform
Figure 873201DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 739525DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 999605DEST_PATH_IMAGE002
The freezing electricity consumption of the electric power source,
Figure 343999DEST_PATH_IMAGE011
and
Figure 373135DEST_PATH_IMAGE012
is the first stage of the platform
Figure 675940DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 892158DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 305822DEST_PATH_IMAGE002
The error in the calculation of (a) is,
Figure 923885DEST_PATH_IMAGE013
and
Figure 899057DEST_PATH_IMAGE014
is the first stage of the platform
Figure 868150DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 554346DEST_PATH_IMAGE010
individual user sub-listThe voltage at the point of the metering is measured,
Figure 558074DEST_PATH_IMAGE015
and
Figure 202682DEST_PATH_IMAGE016
is the first stage of the platform
Figure 393492DEST_PATH_IMAGE009
Metering points and users are divided into metering points and
Figure 148958DEST_PATH_IMAGE010
the power factor of each user sub-metering point is measured by each user,
Figure 476034DEST_PATH_IMAGE003
is the number of metering points of the subscriber sub-table of the station area,
Figure 291544DEST_PATH_IMAGE017
,
Figure 969650DEST_PATH_IMAGE018
;
according to the law of conservation of energy, an electric energy meter operation error mathematical model is established based on the established transformer area low-voltage line loss model, and the calculation formula is as follows:
Figure 27342DEST_PATH_IMAGE019
in the formula (I), the compound is shown in the specification,
Figure 5662DEST_PATH_IMAGE020
is the amount of power supplied to the station area summary table,
Figure 460914DEST_PATH_IMAGE021
is the said platform area
Figure 891896DEST_PATH_IMAGE003
The freezing electricity consumption sum of the metering points is divided into the metering points by each metering point and each user,
Figure 989165DEST_PATH_IMAGE022
is the statistical line loss of the distribution room,
Figure 556412DEST_PATH_IMAGE023
is the low voltage line loss of the station area,
Figure 448145DEST_PATH_IMAGE024
is the fixed loss of the station area,
Figure 366422DEST_PATH_IMAGE025
is of said area
Figure 267382DEST_PATH_IMAGE003
The electric energy loss caused by the metering error of each metering point and each user sub-metering point,
Figure 925022DEST_PATH_IMAGE026
。
3. the method of claim 1, wherein collecting profile information of the distribution area summary table and the subscriber sub-table comprises:
acquiring archive information of a district general table and user sub-tables through a marketing business application system;
collecting according to the archive information
Figure 253235DEST_PATH_IMAGE001
A period of time
Figure 393230DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 97880DEST_PATH_IMAGE003
The freezing electricity consumption of the metering point is divided into the sub-metering points by each user, and the freezing electricity consumption comprises the following steps:
collecting through a power consumption information collecting system according to the archive information
Figure 374141DEST_PATH_IMAGE001
A period of equal time
Figure 873255DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 234967DEST_PATH_IMAGE003
And (4) metering the frozen power consumption data of the metering points by each user.
4. The method of claim 1, wherein collecting is based on the profile information
Figure 477729DEST_PATH_IMAGE001
A period of time
Figure 874075DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 278512DEST_PATH_IMAGE003
After freezing the electricity consumption data of the metering points of the individual users, the method also comprises the following steps:
and carrying out data cleaning on the collected electric quantity data of the summary table and the frozen electric quantity data, and removing data with missing items, data with wrong archive information and data with abnormal judgment in the data.
5. The method of claim 1, wherein the station is based on the station area
Figure 891634DEST_PATH_IMAGE003
Determining the area according to the calculation error of the sub-metering point of each user
Figure 672508DEST_PATH_IMAGE003
The calculation formula of the operation error of the metering point of each user is as follows:
Figure 923361DEST_PATH_IMAGE027
in the formula (I), the compound is shown in the specification,
Figure 764278DEST_PATH_IMAGE028
is the station area
Figure 366160DEST_PATH_IMAGE009
The individual users can measure the running error of the metering point,
Figure 685146DEST_PATH_IMAGE011
is the station area
Figure 56085DEST_PATH_IMAGE009
The calculation error of the metering point is divided into the sub-metering points of each user,
Figure 802324DEST_PATH_IMAGE017
。
6. a system for determining district low voltage line loss and power meter operating errors, the system comprising:
a data acquisition unit for acquiring the file information of the distribution area general table and the user sub-table and acquiring the file information according to the file information
Figure 625923DEST_PATH_IMAGE001
A period of equal time
Figure 748600DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 475510DEST_PATH_IMAGE003
Freezing electricity consumption data of metering points of the individual users in a sub-metering mode;
the system of equations unit is used for generating a system of equations according to the total meter power supply quantity data and the frozen power consumption quantity data, and a pre-established low-voltage line loss model and an electric energy meter operation error mathematical model
Figure 392650DEST_PATH_IMAGE001
A system of equations;
a first computing unit for solving for a solution comprising the
Figure 969125DEST_PATH_IMAGE001
A system of equations defining said region
Figure 895493DEST_PATH_IMAGE003
Calculating errors of sub-metering points of each user and equivalent resistance of each branch of the transformer area;
a second calculation unit for calculating a second calculation result according to the region
Figure 709865DEST_PATH_IMAGE003
The calculation error of the metering point of each user sub-meter, the equivalent resistance of each branch of the distribution area, and the distribution area
Figure 329065DEST_PATH_IMAGE003
Individual subscriber sub-meter measurement point voltage and power factor, and pre-established low voltage line loss model determination
Figure 861678DEST_PATH_IMAGE001
A period of equal time
Figure 591736DEST_PATH_IMAGE002
According to the line loss of the station area
Figure 260615DEST_PATH_IMAGE003
Determining the area according to the calculation error of the sub-metering point of each user
Figure 50717DEST_PATH_IMAGE003
And (4) dividing the running error of the metering point by each user.
7. The system of claim 6, further comprising:
the first model unit is used for establishing a transformer area low-voltage line loss model by utilizing kirchhoff law, and the calculation formula is as follows:
Figure 834740DEST_PATH_IMAGE029
in the formula (I), the compound is shown in the specification,
Figure 368489DEST_PATH_IMAGE006
is the equivalent resistance of each branch of the platform area,
Figure 157453DEST_PATH_IMAGE007
and
Figure 852877DEST_PATH_IMAGE008
is the first stage of the platform
Figure 360082DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 166364DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 340993DEST_PATH_IMAGE002
The freezing electricity consumption of the electric power source,
Figure 207318DEST_PATH_IMAGE011
and
Figure 201819DEST_PATH_IMAGE012
is the first stage of the platform
Figure 313257DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 76813DEST_PATH_IMAGE010
each user sub-metering point in equal time period
Figure 114039DEST_PATH_IMAGE002
The error in the calculation of (a) is,
Figure 595836DEST_PATH_IMAGE013
and
Figure 9500DEST_PATH_IMAGE014
is the first stage of the platform
Figure 627563DEST_PATH_IMAGE009
Individual user sub-metering point and
Figure 101270DEST_PATH_IMAGE010
the individual users divide the meter into the voltage of the metering point,
Figure 804784DEST_PATH_IMAGE015
and
Figure 756559DEST_PATH_IMAGE016
is the first stage of the platform
Figure 494708DEST_PATH_IMAGE009
Metering points and users are divided into metering points and
Figure 873737DEST_PATH_IMAGE010
the power factor of each user sub-metering point is measured by each user,
Figure 828661DEST_PATH_IMAGE003
is the number of metering points of the subscriber sub-table of the station area,
Figure 584127DEST_PATH_IMAGE017
,
Figure 176783DEST_PATH_IMAGE018
;
the second model unit is used for establishing an electric energy meter operation error mathematical model based on the established transformer area low-voltage line loss model according to the energy conservation law, and the calculation formula is as follows:
Figure 992292DEST_PATH_IMAGE019
in the formula (I), the compound is shown in the specification,
Figure 670398DEST_PATH_IMAGE020
is the amount of power supplied to the station area summary table,
Figure 963976DEST_PATH_IMAGE021
is the said platform area
Figure 411138DEST_PATH_IMAGE003
The freezing electricity consumption sum of the metering points is divided into the metering points by each metering point and each user,
Figure 397549DEST_PATH_IMAGE022
is the statistical line loss of the distribution room,
Figure 562951DEST_PATH_IMAGE023
is the low voltage line loss of the station area,
Figure 660220DEST_PATH_IMAGE024
is the fixed loss of the station area,
Figure 463353DEST_PATH_IMAGE025
is of said area
Figure 620665DEST_PATH_IMAGE003
The electric energy loss caused by the metering error of each metering point and each user sub-metering point,
Figure 273363DEST_PATH_IMAGE026
。
8. the system of claim 6, wherein the data collecting unit collects profile information of the district general table and the user sub-table through a marketing service application system, and collects profile information through the electricity consumption information collecting system according to the profile information
Figure 643164DEST_PATH_IMAGE001
A period of equal time
Figure 330498DEST_PATH_IMAGE002
Station area summary table power supply amount data and said station area
Figure 658711DEST_PATH_IMAGE003
And (4) metering the frozen power consumption data of the metering points by each user.
9. The system according to claim 6, further comprising a data processing unit, configured to perform data cleaning on the collected summary table power supply amount data and frozen power consumption amount data, remove data with missing items, data with wrong archive information, and data with abnormal judgment in the data.
10. The system of claim 6, wherein the second computing unit is based on the station area
Figure 533126DEST_PATH_IMAGE003
For one to useDetermining the distribution area by the calculation error of the household sub-meter metering point
Figure 237777DEST_PATH_IMAGE003
The calculation formula of the operation error of the metering point of each user is as follows:
Figure 514037DEST_PATH_IMAGE027
in the formula (I), the compound is shown in the specification,
Figure 13152DEST_PATH_IMAGE030
is the station area
Figure 374863DEST_PATH_IMAGE031
The individual users can measure the running error of the metering point,
Figure DEST_PATH_IMAGE032
is the station area
Figure 405177DEST_PATH_IMAGE031
The calculation error of the metering point is divided into the sub-metering points of each user,
Figure DEST_PATH_IMAGE033
。
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CN113625217A (en) * 2021-07-16 2021-11-09 国网浙江省电力有限公司营销服务中心 Low-voltage transformer area electric energy meter operation error calculation method and system
CN113655425A (en) * 2021-07-16 2021-11-16 国网浙江省电力有限公司营销服务中心 Metering point operation error monitoring method and system suitable for 10KV wiring line
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CN113281697A (en) * 2021-05-20 2021-08-20 国网河南省电力公司营销服务中心 Operation error online analysis method and system
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CN113805138A (en) * 2021-10-18 2021-12-17 国网湖南省电力有限公司 Intelligent electric meter error estimation method and device based on parameter directed traversal
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CN115201743A (en) * 2022-09-16 2022-10-18 北京志翔科技股份有限公司 Method and device for determining error of metering point of low-voltage transformer area and storage medium
CN115600414A (en) * 2022-10-24 2023-01-13 中国电力科学研究院有限公司（Cn） Electric energy meter operation error solving method and device based on AI algorithm
CN115980656A (en) * 2022-11-03 2023-04-18 中国电力科学研究院有限公司 Low-voltage transformer area line loss determination method and system
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