CN113985126B - Method and device for calculating low electricity metering quantity due to under-voltage abnormality - Google Patents

Method and device for calculating low electricity metering quantity due to under-voltage abnormality Download PDF

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CN113985126B
CN113985126B CN202111637355.8A CN202111637355A CN113985126B CN 113985126 B CN113985126 B CN 113985126B CN 202111637355 A CN202111637355 A CN 202111637355A CN 113985126 B CN113985126 B CN 113985126B
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phase
voltage
under
user
abnormal
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CN113985126A (en
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郝跃红
宋洋
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Beijing Zhixiang Technology Co Ltd
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    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods

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Abstract

The invention discloses a method and a device for calculating the electricity quantity of an undervoltage anomaly, wherein the method comprises the following steps: acquiring abnormal electricity utilization data of users with under-voltage abnormality; dividing the collected value of each phase voltage in the abnormal electricity utilization data by the rated voltageTo obtain a list value corresponding to each acquisition value of each phase voltage; calculating the electricity quantity of the undervoltage abnormity according to the following formula
Figure DEST_PATH_IMAGE001
. Wherein T is the time length for collecting abnormal data,
Figure 319174DEST_PATH_IMAGE002
is a phase set, I is the acquisition times,
Figure DEST_PATH_IMAGE003
is composed of
Figure 446268DEST_PATH_IMAGE004
First of phase voltage
Figure DEST_PATH_IMAGE005
A list value corresponding to each of the acquired values,
Figure 62057DEST_PATH_IMAGE006
is as follows
Figure 293318DEST_PATH_IMAGE005
Time of acquisition
Figure 914049DEST_PATH_IMAGE004
The power factor of the phase is determined,
Figure DEST_PATH_IMAGE007
is as follows
Figure 447929DEST_PATH_IMAGE005
Time of acquisition
Figure 285435DEST_PATH_IMAGE004
The phase current is supplied to the phase current,
Figure 287764DEST_PATH_IMAGE008
for the nominal voltage of the user meter,
Figure DEST_PATH_IMAGE009
for platform area healdsThe total multiplying power. By adopting the method and the device, the processes of collecting normal power utilization data and calculating the difference value between the normal power utilization data and the abnormal power utilization data can be avoided, and the method and the device are more convenient to realize.

Description

Method and device for calculating low electricity metering quantity due to under-voltage abnormality
Technical Field
The invention relates to the field of electric quantity data monitoring and calculation, in particular to a method and a device for calculating electric quantity with low metering abnormal under voltage.
Background
At present, the behaviors of default power utilization and power stealing of a special transformer user are frequently checked, wherein the under-voltage abnormality not only brings great potential safety hazards to the power utilization safety, but also causes great economic loss to power supply enterprises. The method is characterized in that undervoltage abnormality of a special transformer user occurs occasionally, and the calculation of the power consumption of the special transformer user which is less than the power consumption of the special transformer user on the day of the undervoltage abnormality is obtained by calculating the difference value of the power consumption of the user on a certain day under the normal condition and the power consumption of the user on a certain day under the undervoltage abnormality condition. The method needs electricity data under the condition of under-voltage abnormality and normal condition, and causes large workload of data acquisition, which causes certain obstruction to electric quantity compensation work.
Disclosure of Invention
The invention provides a method and a device for calculating low electricity metering quantity in case of under-voltage abnormality, which are used for at least solving the problem that the calculation of low electricity metering quantity in case of under-voltage abnormality of a special transformer user in the prior art needs to obtain the work load of electricity consumption data under normal and abnormal conditions.
According to the embodiment of the first aspect of the present invention, a method for calculating an amount of electricity counted in an abnormal under-voltage state includes:
acquiring abnormal electricity utilization data of users with under-voltage abnormality;
dividing the acquired value of each phase voltage in the abnormal electricity utilization data by a rated voltage to obtain a list value corresponding to each acquired value of each phase voltage;
according to the formula 1, the power consumption is reduced by calculating the abnormal under-voltage
Figure 128223DEST_PATH_IMAGE001
Figure 790148DEST_PATH_IMAGE002
In the formula 1, the first and second groups,
wherein the content of the first and second substances,
Figure 256902DEST_PATH_IMAGE003
is a phaseCollecting, T is the time length for collecting abnormal data, I is the collection frequency,
Figure 574750DEST_PATH_IMAGE004
is composed of
Figure 886783DEST_PATH_IMAGE005
First of phase voltage
Figure 199953DEST_PATH_IMAGE006
A list value corresponding to each of the acquired values,
Figure 837608DEST_PATH_IMAGE007
is as follows
Figure 377173DEST_PATH_IMAGE006
Time of acquisition
Figure 758476DEST_PATH_IMAGE005
The power factor of the phase is determined,
Figure 67098DEST_PATH_IMAGE008
is as follows
Figure 141233DEST_PATH_IMAGE006
Time of acquisition
Figure 27149DEST_PATH_IMAGE005
The phase current is supplied to the phase current,
Figure 87509DEST_PATH_IMAGE009
for the nominal voltage of the user meter,
Figure 109692DEST_PATH_IMAGE010
is the comprehensive multiplying power of the transformer area.
According to some embodiments of the invention, the collecting abnormal electricity consumption data of the user with the under-voltage abnormality comprises:
and in a preset time period, acquiring abnormal electricity utilization data of users with the under-voltage abnormality according to a preset period so as to calculate the average low electricity consumption of the under-voltage abnormality in the preset time period.
According to some embodiments of the invention, the preset time period is the day when the user with the under-voltage abnormality occurs the earliest;
the value interval of the preset period is [5min, 30min ].
According to some embodiments of the invention, when the user is a three-phase, three-wire user,
Figure 354728DEST_PATH_IMAGE011
；
when the user is a three-phase four-wire user
Figure 337728DEST_PATH_IMAGE012
；
The A, the B and the C respectively represent an A phase, a B phase and a C phase in three phases.
According to some embodiments of the invention, the method further comprises:
when calculating the under-voltage abnormity, the electricity quantity is less
Figure 60833DEST_PATH_IMAGE013
And judging whether the list value is larger than the under-voltage proportion threshold value or not, and if so, setting the list value to be 1.
According to a second aspect of the present invention, a device for calculating an amount of electricity consumed due to an abnormal under-voltage condition includes:
the acquisition unit is used for acquiring abnormal electricity utilization data of users with under-voltage abnormality;
the processing unit is used for dividing the acquired value of each phase voltage in the abnormal electricity utilization data by the rated voltage to obtain a list value corresponding to each acquired value of each phase voltage;
a calculating unit for calculating the electricity consumption of the under-voltage abnormality according to formula 1
Figure 937522DEST_PATH_IMAGE001
Figure 87881DEST_PATH_IMAGE002
In the formula 1, the first and second groups,
wherein the content of the first and second substances,
Figure 823756DEST_PATH_IMAGE003
is a phase set, T is the time length for acquiring abnormal data, I is the acquisition frequency,
Figure 616131DEST_PATH_IMAGE004
is composed of
Figure 753852DEST_PATH_IMAGE005
First of phase voltage
Figure 75112DEST_PATH_IMAGE006
A list value corresponding to each of the acquired values,
Figure 891758DEST_PATH_IMAGE007
for the ith acquisition time
Figure 956666DEST_PATH_IMAGE005
The power factor of the phase is determined,
Figure 948893DEST_PATH_IMAGE008
is as follows
Figure 300108DEST_PATH_IMAGE006
Time of acquisition
Figure 744996DEST_PATH_IMAGE005
The phase current is supplied to the phase current,
Figure 613595DEST_PATH_IMAGE009
for the nominal voltage of the user meter,
Figure 584962DEST_PATH_IMAGE010
is the comprehensive multiplying power of the transformer area.
According to some embodiments of the invention, the acquisition unit is configured to:
and in a preset time period, acquiring abnormal electricity utilization data of users with the under-voltage abnormality according to a preset period so as to calculate the average low electricity consumption of the under-voltage abnormality in the preset time period.
According to some embodiments of the invention, the preset time period is the day when the user with the under-voltage abnormality occurs the earliest;
the value interval of the preset period is [5min, 30min ].
According to some embodiments of the invention, when the user is a three-phase, three-wire user,
Figure 388970DEST_PATH_IMAGE011
；
when the user is a three-phase four-wire user
Figure 445788DEST_PATH_IMAGE012
；
The A, the B and the C respectively represent an A phase, a B phase and a C phase in three phases.
According to some embodiments of the invention, the processing unit is further configured to:
when calculating the under-voltage abnormity, the electricity quantity is less
Figure 586919DEST_PATH_IMAGE013
And judging whether the list value is larger than the under-voltage proportion threshold value or not, and if so, setting the list value to be 1.
By adopting the embodiment of the invention, the abnormal electricity utilization data is collected, the collected voltage value of each phase is divided by the rated voltage to obtain the corresponding list value, the low electricity metering quantity under the condition of under-voltage abnormality is calculated by adopting the corresponding formula through the list value, the process of solving the difference between the electricity utilization data and the abnormal electricity utilization data under the condition of normal wiring is avoided, and the workload is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
FIG. 1 is a flowchart of a method for calculating an amount of electricity counted due to abnormal under-voltage according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment of the first aspect of the invention provides a method for calculating the undervoltage abnormal undermetering electric quantity, which comprises the following steps:
and collecting abnormal electricity utilization data of users with the under-voltage abnormality.
And dividing the acquired value of each phase voltage in the abnormal electricity utilization data by the rated voltage to obtain a list value corresponding to each acquired value of each phase voltage.
From the combination of the tabulated values of the phases, a tabulated proportion of the voltage forming each phase can be constructed.
According to the formula 1, the power consumption is reduced by calculating the abnormal under-voltage
Figure 553738DEST_PATH_IMAGE001
Figure 653281DEST_PATH_IMAGE002
In the formula 1, the first and second groups,
wherein the content of the first and second substances,
Figure 666236DEST_PATH_IMAGE003
is a phase set, T is the time length (unit is hour) for acquiring abnormal data, I is the acquisition times,
Figure 142217DEST_PATH_IMAGE004
is composed of
Figure 963543DEST_PATH_IMAGE005
First of phase voltage
Figure 499566DEST_PATH_IMAGE006
A collected value (the first
Figure 140763DEST_PATH_IMAGE006
The value collected at the moment of collection) corresponding to the list value,
Figure 154855DEST_PATH_IMAGE007
is as follows
Figure 96267DEST_PATH_IMAGE006
Time of acquisition
Figure 272033DEST_PATH_IMAGE005
The power factor of the phase is determined,
Figure 259581DEST_PATH_IMAGE008
is as follows
Figure 77364DEST_PATH_IMAGE006
Time of acquisition
Figure 466757DEST_PATH_IMAGE005
The phase current is supplied to the phase current,
Figure 219949DEST_PATH_IMAGE009
for the nominal voltage of the user meter,
Figure 225951DEST_PATH_IMAGE010
is the comprehensive multiplying power of the transformer area.
By adopting the embodiment of the invention, the abnormal electricity utilization data is collected, the collected voltage value of each phase is divided by the rated voltage to obtain the corresponding list value, the corresponding formula is adopted to calculate the small electricity metering quantity under the condition of under-voltage abnormality, the process of calculating the difference value between the normal electricity utilization data and the abnormal electricity utilization data which need to be collected is avoided, and the workload is reduced.
On the basis of the above-described embodiment, various modified embodiments are further proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the various modified embodiments.
According to some embodiments of the invention, the manner of collection includes, but is not limited to, data collection by an electrical data collection tool. The acquired data includes, but is not limited to, phase currents, phase voltages, station area synthesis magnification, and power factor.
According to some embodiments of the invention, the collecting abnormal electricity consumption data of the user with the under-voltage abnormality comprises:
and in a preset time period, acquiring abnormal electricity utilization data of users with the under-voltage abnormality according to a preset period so as to calculate the average low electricity consumption of the under-voltage abnormality in the preset time period.
For example, abnormal electricity consumption data of a user with an abnormal under-voltage condition for 24 hours is collected, and data collection is performed at a frequency of once every 15 minutes, i.e., T =24h and I = 96.
The period and the time length of data acquisition can be adjusted according to actual conditions.
According to some embodiments of the invention, the preset time period is the day when the user with the under-voltage abnormality occurs the earliest;
the value interval of the preset period is [5min, 30min ]. For example, the data acquisition period is set to 15min, so that 96 groups of electricity utilization data with abnormal under-voltage are obtained.
According to some embodiments of the invention, when the user is a three-phase, three-wire user,
Figure 722792DEST_PATH_IMAGE011
。
when the user is a three-phase four-wire user
Figure 232271DEST_PATH_IMAGE012
；
The A, the B and the C respectively represent an A phase, a B phase and a C phase in three phases.
According to some embodiments of the invention, the method further comprises:
when calculating the under-voltage abnormity, the electricity quantity is less
Figure 890785DEST_PATH_IMAGE013
And judging whether the list value is larger than the under-voltage proportion threshold value or not, and if so, setting the list value to be 1. Through the operation, the electricity consumption data under partial non-conformity undervoltage conditions can be reduced, and the accuracy of calculating the low electricity consumption is improved.
According to some embodiments of the invention, the power factor may be obtained by direct acquisition.
According to some embodiments of the invention, the power factor may also be obtained by indirect acquisition. For example, the active power P of abnormal electricity utilization can be acquired through collectionActive powerAnd reactive power QReactive powerThen, the power factor f is calculated according to the following formula:
Figure 384083DEST_PATH_IMAGE014
。
in another example, the active power P of one phase of abnormal electricity utilization is acquired through collectionActive powerCurrent I, voltage U, and then calculating power factor f according to the following formula:
Figure 278090DEST_PATH_IMAGE015
。
according to some embodiments of the invention, the electricity data of the three-phase three-wire under-voltage abnormal user within 24 hours is collected, wherein the collection period is 15 minutes, and 96 groups of electricity data are obtained. For a three-phase three-wire user, the data of the phase B is 0, only the phase A and the phase C have values, and the method is obtained according to the law of energy conservation:
Figure 642075DEST_PATH_IMAGE016
in the formula 2, the first and second groups,
wherein the content of the first and second substances,
Figure 471491DEST_PATH_IMAGE017
as a result of the total active power,
Figure 186506DEST_PATH_IMAGE018
is the active power of the phase A,
Figure 25149DEST_PATH_IMAGE019
and is C-phase active power.
And due to the existence of an equation
Figure 509220DEST_PATH_IMAGE020
Wherein, in the step (A),
Figure 775116DEST_PATH_IMAGE021
is the active power of a certain phase,
Figure 977428DEST_PATH_IMAGE022
is the current of a certain phase and is,
Figure 619761DEST_PATH_IMAGE023
is the voltage of a certain phase and is,
Figure 223918DEST_PATH_IMAGE024
is the power factor of a phase.
Equation 2 can be written as:
Figure 660716DEST_PATH_IMAGE025
in the formula 3, the first and second phases,
under normal conditions, the voltage of each phase is substantially the same as the rated voltage, and the total active power under normal conditions is:
Figure 350323DEST_PATH_IMAGE026
in the case of the formula 4,
wherein the content of the first and second substances,
Figure 530769DEST_PATH_IMAGE027
is A phaseOn the day of abnormality
Figure 989432DEST_PATH_IMAGE006
Current at each acquisition time;
Figure 597131DEST_PATH_IMAGE028
phase C on the abnormal day
Figure 774034DEST_PATH_IMAGE006
The current at each of the acquisition times is,
Figure 492591DEST_PATH_IMAGE009
is a rated voltage;
Figure 71340DEST_PATH_IMAGE029
phase A on the day of abnormality
Figure 849940DEST_PATH_IMAGE006
Power factor at each acquisition time;
Figure 248561DEST_PATH_IMAGE030
phase C on the abnormal day
Figure 895443DEST_PATH_IMAGE006
Power factor at each acquisition instant.
Under the condition of under-voltage abnormality, the ratio of the voltage of each phase at each acquisition moment on the abnormal day to the rated voltage is calculated to obtain a voltage ratio list
Figure 204064DEST_PATH_IMAGE031
And
Figure 278200DEST_PATH_IMAGE032
the elements in these two lists are represented as:
Figure 836220DEST_PATH_IMAGE033
in the case of the formula 5,
Figure 286793DEST_PATH_IMAGE034
in the case of the formula 6,
wherein the content of the first and second substances,
Figure 715500DEST_PATH_IMAGE035
is a list
Figure 960537DEST_PATH_IMAGE031
To middle
Figure 68170DEST_PATH_IMAGE006
An element;
Figure 932221DEST_PATH_IMAGE036
phase A on the day of abnormality
Figure 74489DEST_PATH_IMAGE006
Voltage at each acquisition time;
Figure 631372DEST_PATH_IMAGE037
is a list
Figure 662520DEST_PATH_IMAGE032
To middle
Figure 681595DEST_PATH_IMAGE006
An element;
Figure 412791DEST_PATH_IMAGE038
phase C on the abnormal day
Figure 734051DEST_PATH_IMAGE006
Voltage at each acquisition time;
Figure 816276DEST_PATH_IMAGE009
is a rated voltage.
Given undervoltage proportional threshold
Figure 22130DEST_PATH_IMAGE039
When is coming into contact with
Figure 138990DEST_PATH_IMAGE040
To middle
Figure 37676DEST_PATH_IMAGE006
Each element is greater than or equal to
Figure 43416DEST_PATH_IMAGE039
When the voltage is normal, i.e.
Figure 646436DEST_PATH_IMAGE041
Then give an order
Figure 493169DEST_PATH_IMAGE042
. On the contrary, when
Figure 421811DEST_PATH_IMAGE040
To middle
Figure 72104DEST_PATH_IMAGE006
Each element is greater than
Figure 744394DEST_PATH_IMAGE039
When the temperature of the water is higher than the set temperature,
Figure 711213DEST_PATH_IMAGE004
remain unchanged.
Therefore, when the undervoltage is abnormal, the total active power expression is as follows:
Figure 810756DEST_PATH_IMAGE043
in the formula 7, the first and second groups,
from equation 5 and equation 6
Figure 89290DEST_PATH_IMAGE044
，
Figure 440637DEST_PATH_IMAGE045
Then equation 7 can be written as:
Figure 386596DEST_PATH_IMAGE046
in the case of the formula 8,
therefore, the difference between the total active power in the normal case and the abnormal case is as follows:
Figure 532407DEST_PATH_IMAGE047
in the formula 9, the first and second groups,
since the interval between every two time points is 15 minutes, namely 1/4 hours, the difference between the normal power consumption and the abnormal power consumption is as follows without considering the comprehensive multiplying power:
Figure 298238DEST_PATH_IMAGE048
in the formula 10, the process is described,
because the electric energy number of the special transformer user is obtained after dividing by the comprehensive multiplying power, the final daily average power-lack formula of the three-phase three-wire user under-voltage abnormity is as follows:
Figure 312330DEST_PATH_IMAGE049
in the formula 11, the first and second groups,
according to some embodiments of the invention, the electricity data of the three-phase three-wire under-voltage abnormal user within 24 hours is collected, wherein the collection period is 15 minutes, and 96 groups of electricity data are obtained. For three-phase four-wire users, the A, B and C phases all have data, and the data are obtained according to the law of energy conservation:
Figure 253741DEST_PATH_IMAGE050
in the formula 12, the process is described,
wherein the content of the first and second substances,
Figure 695087DEST_PATH_IMAGE017
as a result of the total active power,
Figure 89159DEST_PATH_IMAGE018
is the active power of the phase A,
Figure 906942DEST_PATH_IMAGE051
the active power of the phase B is obtained,
Figure 702860DEST_PATH_IMAGE019
and is C-phase active power.
And due to the existence of an equation
Figure 580686DEST_PATH_IMAGE020
Wherein, in the step (A),
Figure 462055DEST_PATH_IMAGE021
is the active power of a certain phase,
Figure 817950DEST_PATH_IMAGE022
is the current of a certain phase and is,
Figure 468374DEST_PATH_IMAGE023
is the voltage of a certain phase and is,
Figure 517101DEST_PATH_IMAGE024
is the power factor of a phase.
Equation 12 can be written as:
Figure 151345DEST_PATH_IMAGE052
in the formula 13, the first and second groups,
under normal conditions, the voltage of each phase is substantially the same as the rated voltage, and the total active power under normal conditions is:
Figure 186297DEST_PATH_IMAGE053
in the case of the formula 14,
wherein the content of the first and second substances,
Figure 815861DEST_PATH_IMAGE027
phase A on the day of abnormality
Figure 504332DEST_PATH_IMAGE006
Current at each acquisition time;
Figure 360292DEST_PATH_IMAGE054
phase B on the day of abnormality
Figure 57990DEST_PATH_IMAGE006
Current at each acquisition time;
Figure 683006DEST_PATH_IMAGE028
phase C on the abnormal day
Figure 73536DEST_PATH_IMAGE006
Current at each acquisition time;
Figure 151214DEST_PATH_IMAGE009
is a rated voltage;
Figure 652602DEST_PATH_IMAGE029
phase A on the day of abnormality
Figure 256759DEST_PATH_IMAGE006
Power factor at each acquisition time;
Figure 959136DEST_PATH_IMAGE055
phase B on the day of abnormality
Figure 383164DEST_PATH_IMAGE006
Power factor at each acquisition time;
Figure 563609DEST_PATH_IMAGE030
phase C on the abnormal day
Figure 163218DEST_PATH_IMAGE006
Power factor at each acquisition instant.
Under the condition of under-voltage abnormality, the ratio of the voltage of each phase point to the rated voltage on the abnormality day is calculated to obtain a voltage ratio list
Figure 895551DEST_PATH_IMAGE031
，
Figure 947820DEST_PATH_IMAGE056
And
Figure 525432DEST_PATH_IMAGE032
the elements in these three lists are represented as:
Figure 245126DEST_PATH_IMAGE033
in the formula 15, the process is described,
Figure 148360DEST_PATH_IMAGE057
in the formula 16, the process is described,
Figure 546981DEST_PATH_IMAGE034
in the formula 17, the process is described,
wherein the content of the first and second substances,
Figure 334808DEST_PATH_IMAGE035
is a list
Figure 643430DEST_PATH_IMAGE031
To middle
Figure 717565DEST_PATH_IMAGE006
An element;
Figure 478848DEST_PATH_IMAGE036
phase A on the day of abnormality
Figure 929420DEST_PATH_IMAGE006
Voltage at each acquisition time;
Figure 92549DEST_PATH_IMAGE058
is a list
Figure 337585DEST_PATH_IMAGE056
To middle
Figure 851743DEST_PATH_IMAGE006
An element;
Figure 840428DEST_PATH_IMAGE059
phase B on the day of abnormality
Figure 858062DEST_PATH_IMAGE006
Voltage at each acquisition time;
Figure 539579DEST_PATH_IMAGE037
is a list
Figure 275454DEST_PATH_IMAGE032
To middle
Figure 802250DEST_PATH_IMAGE006
An element;
Figure 939971DEST_PATH_IMAGE038
phase C on the abnormal day
Figure 792389DEST_PATH_IMAGE006
Voltage at each acquisition time;
Figure 15560DEST_PATH_IMAGE009
is a rated voltage.
Given undervoltage proportional threshold
Figure 611626DEST_PATH_IMAGE039
When is coming into contact with
Figure 603853DEST_PATH_IMAGE060
To middle
Figure 361594DEST_PATH_IMAGE006
Each element is greater than or equal to
Figure 72061DEST_PATH_IMAGE039
When it is determined that the voltage is normal, i.e.
Figure 206239DEST_PATH_IMAGE061
Then give an order
Figure 52972DEST_PATH_IMAGE042
And on the contrary,
Figure 247193DEST_PATH_IMAGE004
remain unchanged.
Therefore, when the undervoltage is abnormal, the total active power expression is as follows:
Figure 179377DEST_PATH_IMAGE062
in the formula 18, the process is described,
from equation 15, equation 16, and equation 17
Figure 117246DEST_PATH_IMAGE044
，
Figure 84065DEST_PATH_IMAGE063
，
Figure 183608DEST_PATH_IMAGE045
Then equation 18 can be written as:
Figure 868667DEST_PATH_IMAGE064
in the formula 19, the process is described,
therefore, the difference between the total active power in the normal case and the total active power in the abnormal case is:
Figure 344648DEST_PATH_IMAGE065
in the formula 20, the process is described,
equation 20 the detailed equation is as follows:
Figure 165973DEST_PATH_IMAGE066
in the formula (21), the first and second,
since the interval between every two time points is 15 minutes, namely 1/4 hours, the difference between the normal power consumption and the abnormal power consumption is as follows without considering the comprehensive multiplying power:
Figure 436418DEST_PATH_IMAGE067
in the formula 22, the process is described,
because the electric energy number of the special transformer user is obtained after dividing by the comprehensive multiplying power, the final daily average power-lack formula of the three-phase four-wire user under-voltage abnormity is as follows:
Figure 343194DEST_PATH_IMAGE068
equation 23.
The embodiment of the second aspect of the present invention provides a device for calculating an amount of electricity consumed due to abnormal under-voltage, including:
and the acquisition unit is used for acquiring abnormal electricity utilization data of users with the under-voltage abnormality. The manner of collection includes, but is not limited to, data collection by an electrical data collection tool. The acquired data includes, but is not limited to, phase currents, phase voltages, station area synthesis magnification, and power factor.
And the processing unit is used for dividing the acquired value of each phase voltage in the abnormal electricity utilization data by the rated voltage to obtain a list value corresponding to each acquired value of each phase voltage. The list of voltage ratios for each phase is combined from the list values for each phase.
A calculating unit for calculating the electricity consumption of the under-voltage abnormality according to formula 1
Figure 622865DEST_PATH_IMAGE001
Figure 298697DEST_PATH_IMAGE002
In the formula 1, the first and second groups,
wherein the content of the first and second substances,
Figure 5622DEST_PATH_IMAGE003
is a phase set, T is a collection setThe duration of the data (in hours), I the number of acquisitions,
Figure 399695DEST_PATH_IMAGE004
is composed of
Figure 217478DEST_PATH_IMAGE005
First of phase voltage
Figure 13395DEST_PATH_IMAGE006
A list value corresponding to each of the acquired values,
Figure 891222DEST_PATH_IMAGE007
is as follows
Figure 772590DEST_PATH_IMAGE006
Time of day
Figure 128485DEST_PATH_IMAGE005
The power factor of the phase is determined,
Figure 44488DEST_PATH_IMAGE008
is as follows
Figure 968582DEST_PATH_IMAGE006
Time of day
Figure 461880DEST_PATH_IMAGE005
The phase current is supplied to the phase current,
Figure 496832DEST_PATH_IMAGE009
for the nominal voltage of the user meter,
Figure 126397DEST_PATH_IMAGE010
is the comprehensive multiplying power of the transformer area.
By adopting the embodiment of the invention, the abnormal electricity utilization data is collected, the collected voltage value of each phase is divided by the rated voltage to obtain the corresponding list value, the corresponding formula is adopted to calculate the small electricity metering quantity under the condition of under-voltage abnormality, the process of calculating the difference value between the normal electricity utilization data and the abnormal electricity utilization data which need to be collected is avoided, and the workload is reduced.
According to some embodiments of the invention, the acquisition unit is configured to:
and in a preset time period, acquiring abnormal electricity utilization data of users with the under-voltage abnormality according to a preset period so as to calculate the average low electricity consumption of the under-voltage abnormality in the preset time period.
For example, abnormal electricity consumption data of a user with an abnormal under-voltage condition for 24 hours is collected, and data collection is performed at a frequency of once every 15 minutes. The period and the time length of data acquisition can be adjusted according to actual conditions.
According to some embodiments of the invention, the preset time period is the day when the user with the under-voltage abnormality occurs the earliest.
The value interval of the preset period is [5min, 30min ]. For example, the data acquisition period is set to 15min, so that 96 groups of electricity utilization data with abnormal under-voltage are obtained.
According to some embodiments of the invention, when the user is a three-phase, three-wire user,
Figure 221392DEST_PATH_IMAGE011
。
when the user is a three-phase four-wire user
Figure 936407DEST_PATH_IMAGE012
；
The A, the B and the C respectively represent an A phase, a B phase and a C phase in three phases.
According to some embodiments of the invention, the processing unit is further configured to:
when calculating the under-voltage abnormity, the electricity quantity is less
Figure 775050DEST_PATH_IMAGE013
And judging whether the list value is larger than the under-voltage proportion threshold value or not, and if so, setting the list value to be 1. Through the operation, the electricity consumption data under partial non-conformity undervoltage conditions can be reduced, and the accuracy of calculating the low electricity consumption is improved.
The following describes in detail an apparatus for calculating an under-voltage abnormal low-power-count amount using a method for calculating an under-voltage abnormal low-power-count amount with reference to fig. 1. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting. All similar structures and similar variations thereof adopted by the invention are intended to fall within the scope of the invention.
Taking a three-phase three-wire user as an example, firstly, the acquisition unit acquires abnormal electricity utilization data of the under-voltage abnormal user, the acquisition period is set to be 15 minutes, and the acquisition time is 24 hours on the same day after the abnormal data appears at the earliest. The acquired data includes, but is not limited to, phase currents, phase voltages, station area synthesis magnification, and power factor. The processing unit divides the acquired voltage data of each phase by the rated voltage to acquire 96 tabulation values corresponding to the acquisition time of each phase. The list values form two lists
Figure 524700DEST_PATH_IMAGE031
And
Figure 790596DEST_PATH_IMAGE032
。
the calculation unit calculates the daily average journal power consumption based on the following formula
Figure 16345DEST_PATH_IMAGE013
：
Figure 393100DEST_PATH_IMAGE069
，
Since T =24 hours, I =96, so
Figure 997256DEST_PATH_IMAGE013
The calculation formula of (c) can be expressed as follows:
Figure 434054DEST_PATH_IMAGE070
；
wherein i represents the ith acquisition,
Figure 123661DEST_PATH_IMAGE035
is composed of
Figure 304107DEST_PATH_IMAGE071
First of phase voltage
Figure 28349DEST_PATH_IMAGE006
A list value corresponding to each of the acquired values,
Figure 636048DEST_PATH_IMAGE029
is as follows
Figure 547372DEST_PATH_IMAGE006
Time of day
Figure 531509DEST_PATH_IMAGE071
The power factor of the phase is determined,
Figure 110258DEST_PATH_IMAGE027
is as follows
Figure 888858DEST_PATH_IMAGE006
Time of day
Figure 287478DEST_PATH_IMAGE071
The phase current is supplied to the phase current,
Figure 75306DEST_PATH_IMAGE037
is composed of
Figure 508561DEST_PATH_IMAGE072
First of phase voltage
Figure 458063DEST_PATH_IMAGE006
A list value corresponding to each of the acquired values,
Figure 609558DEST_PATH_IMAGE030
is as follows
Figure 669918DEST_PATH_IMAGE006
Time of day
Figure 223259DEST_PATH_IMAGE072
The power factor of the phase is determined,
Figure 343662DEST_PATH_IMAGE028
is as follows
Figure 716874DEST_PATH_IMAGE006
Time of day
Figure 580925DEST_PATH_IMAGE072
Phase current
Figure 988773DEST_PATH_IMAGE073
For the nominal voltage of the user meter,
Figure 280077DEST_PATH_IMAGE010
is the comprehensive multiplying power of the transformer area.
By adopting the embodiment of the invention, the abnormal electricity utilization data is collected, the collected voltage value of each phase is divided by the rated voltage to obtain the corresponding list value, and the corresponding formula is adopted to calculate the small electricity metering quantity under the condition of under-voltage abnormality, thereby avoiding the process of calculating the difference value between the normal electricity utilization data and the abnormal electricity utilization data, reducing the workload and improving the calculation accuracy.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited thereto, and those skilled in the art can make various modifications and changes, and various embodiments can be freely combined. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It should be noted that well-known methods, structures and techniques have not been shown in detail in the description of the specification in order not to obscure the understanding of this description.

Claims (10)

1. A method for calculating the electricity metering quantity of the under-voltage abnormity is characterized by comprising the following steps:
acquiring abnormal electricity utilization data of users with under-voltage abnormality;
dividing the acquired value of each phase voltage in the abnormal electricity utilization data by a rated voltage to obtain a list value corresponding to each acquired value of each phase voltage;
according to the formula 1, the power consumption is reduced by calculating the abnormal under-voltage
Figure 565243DEST_PATH_IMAGE001
Figure 170799DEST_PATH_IMAGE002
In the formula 1, the first and second groups,
wherein the content of the first and second substances,
Figure 888219DEST_PATH_IMAGE003
is a phase set, T is the time length for acquiring abnormal data, I is the acquisition frequency,
Figure 470379DEST_PATH_IMAGE004
is composed of
Figure 222434DEST_PATH_IMAGE005
First of phase voltage
Figure 733312DEST_PATH_IMAGE006
A list value corresponding to each of the acquired values,
Figure 672450DEST_PATH_IMAGE007
is as follows
Figure 58300DEST_PATH_IMAGE006
Time of acquisition
Figure 664862DEST_PATH_IMAGE005
The power factor of the phase is determined,
Figure 346642DEST_PATH_IMAGE008
is as follows
Figure 897709DEST_PATH_IMAGE006
Time of acquisition
Figure 572404DEST_PATH_IMAGE005
The phase current is supplied to the phase current,
Figure 17160DEST_PATH_IMAGE009
for the nominal voltage of the user meter,
Figure 119109DEST_PATH_IMAGE010
is the comprehensive multiplying power of the transformer area.
2. The method of claim 1, wherein the collecting abnormal electricity consumption data of the user with the under-voltage abnormality comprises:
and in a preset time period, acquiring abnormal electricity utilization data of users with the under-voltage abnormality according to a preset period so as to calculate the average low electricity consumption of the under-voltage abnormality in the preset time period.
3. The method of claim 2, wherein the preset time period is the day when the user with the under-voltage abnormality occurs the earliest;
the value interval of the preset period is [5min, 30min ].
4. The method of claim 1, wherein, when the user is a three-phase, three-wire user,
Figure 49150DEST_PATH_IMAGE011
；
when the user is a three-phase four-wire user
Figure 261956DEST_PATH_IMAGE012
；
The A, the B and the C respectively represent an A phase, a B phase and a C phase in three phases.
5. The method of claim 1, wherein the method further comprises:
when calculating the under-voltage abnormity, the electricity quantity is less
Figure 826799DEST_PATH_IMAGE013
And judging whether the list value is larger than the under-voltage proportion threshold value or not, and if so, setting the list value to be 1.
6. The utility model provides a calculation device of undervoltage unusual few meter electric quantity which characterized in that includes:
the acquisition unit is used for acquiring abnormal electricity utilization data of users with under-voltage abnormality;
the processing unit is used for dividing the acquired value of each phase voltage in the abnormal electricity utilization data by the rated voltage to obtain a list value corresponding to each acquired value of each phase voltage;
a calculating unit for calculating the electricity consumption of the under-voltage abnormality according to formula 1
Figure 99648DEST_PATH_IMAGE001
Figure 625307DEST_PATH_IMAGE002
In the formula 1, the first and second groups,
wherein the content of the first and second substances,
Figure 392537DEST_PATH_IMAGE003
is a phase set, T is the time length for acquiring abnormal data, I is the acquisition frequency,
Figure 562619DEST_PATH_IMAGE004
is composed of
Figure 521216DEST_PATH_IMAGE005
First of phase voltage
Figure 143959DEST_PATH_IMAGE006
A list value corresponding to each of the acquired values,
Figure 714880DEST_PATH_IMAGE007
is as follows
Figure 739467DEST_PATH_IMAGE014
Time of day
Figure 868966DEST_PATH_IMAGE005
The power factor of the phase is determined,
Figure 103638DEST_PATH_IMAGE008
is as follows
Figure 461939DEST_PATH_IMAGE014
Time of day
Figure 357345DEST_PATH_IMAGE005
The phase current is supplied to the phase current,
Figure 408477DEST_PATH_IMAGE009
for the nominal voltage of the user meter,
Figure 520659DEST_PATH_IMAGE010
is the comprehensive multiplying power of the transformer area.
7. The apparatus of claim 6, wherein the acquisition unit is to:
and in a preset time period, acquiring abnormal electricity utilization data of users with the under-voltage abnormality according to a preset period so as to calculate the average low electricity consumption of the under-voltage abnormality in the preset time period.
8. The apparatus of claim 7, wherein the preset time period is a day when a user with an under-voltage anomaly is the earliest to have an anomaly;
the value interval of the preset period is [5min, 30min ].
9. The apparatus of claim 6, wherein when the user is a three-phase, three-wire user,
Figure 417070DEST_PATH_IMAGE011
；
when the user is a three-phase four-wire user
Figure 913122DEST_PATH_IMAGE012
；
The A, the B and the C respectively represent an A phase, a B phase and a C phase in three phases.
10. The apparatus as recited in claim 6, said processing unit to further:
when calculating the under-voltage abnormity, the electricity quantity is less
Figure 135156DEST_PATH_IMAGE013
And judging whether the list value is larger than the under-voltage proportion threshold value or not, and if so, setting the list value to be 1.
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