CN111257607A - Method for checking parallel resistance electricity stealing of single-phase electric energy meter - Google Patents
Method for checking parallel resistance electricity stealing of single-phase electric energy meter Download PDFInfo
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- CN111257607A CN111257607A CN202010148387.0A CN202010148387A CN111257607A CN 111257607 A CN111257607 A CN 111257607A CN 202010148387 A CN202010148387 A CN 202010148387A CN 111257607 A CN111257607 A CN 111257607A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000007774 longterm Effects 0.000 claims abstract description 8
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- 239000011159 matrix material Substances 0.000 claims description 6
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/24—Arrangements for avoiding or indicating fraudulent use
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Abstract
The invention relates to a method for checking electricity stealing of parallel resistors of a single-phase electric energy meter, and belongs to the technical field of electricity stealing checking methods. The technical scheme is as follows: (1) clearing a user meter with the long-term electric quantity of 0 in advance; (2) for the line loss steep increase transformer area, deriving the household meter electric quantity, the total household meter electric quantity and the total household meter electric quantity which are continuously three days after steep increase from the acquisition system; (3) get corresponding
Description
Technical Field
The invention relates to a method for checking electricity stealing of parallel resistors of a single-phase electric energy meter, and belongs to the technical field of electricity stealing checking methods.
Background
The line loss relates to the economic benefit of a power grid, in the electricity stealing method, electricity stealing through parallel resistors belongs to shunt electricity stealing, and detectable phenomena such as voltage loss, current cutoff and the like do not occur in an electricity stealing meter in the process, so that the abnormal detection function in the electricity information acquisition system is invalid. The power grid basic electricity stealing inspection method is limited to checking external wiring of each ammeter, uncapping records of the electric energy meters and comparing the difference between the metering current and the actual current, and the traditional method is time-consuming, low in efficiency and low in accuracy.
Disclosure of Invention
The invention aims to provide a method for checking parallel resistance electricity stealing of a single-phase electric energy meter, which is characterized in that on the basis of not increasing investment, the existing line loss sudden increase data and station area daily electric quantity data are obtained and substituted into an electricity stealing model, and an electricity stealing meter is calculated by using a least square method.
The technical scheme of the invention is as follows: a method for checking the parallel resistance electricity stealing of a single-phase electric energy meter comprises the following steps: (1) clearing a user meter with the long-term electric quantity of 0 in advance; (2) for the line loss steep increase transformer area, deriving the household meter electric quantity, the total household meter electric quantity and the total household meter electric quantity which are continuously three days after steep increase from the acquisition system; (3) get corresponding
Three matrix, single-phase electric energy meter parallel resistance electricity-stealing mathematical model is
J = 1.. ann, n; (4) substituting three matrices into
The contrast is slightly less than the normal time-day line loss, and at the same time, k is>0, the suspicion of electricity stealing exists in the account table corresponding to the j at the moment.
A method for checking the parallel resistance electricity stealing of a single-phase electric energy meter comprises the following steps: (1) clearing a user meter with the long-term electric quantity of 0 in advance; (2) for the line loss steep increase transformer area, deriving the household meter electric quantity, the total household meter electric quantity and the total household meter electric quantity which are continuously three days after steep increase from the acquisition system; (3) get corresponding
Three matrix, single-phase electric energy meter parallel resistance electricity-stealing mathematical model is
J = 1.. ann, n; (4) obtaining an approximate value of k according to the ratio of the additional loss electric quantity to the electric quantity of the household meter for three consecutive days; making a difference between the k approximate values of two adjacent days; multiplying the two difference values; the smallest product absolute value is the suspected person of electric larceny.
The invention has the beneficial effects that: on the basis of not increasing investment, the existing line loss sudden increase data and the station area daily electric quantity data are obtained and substituted into an electricity stealing model, a least square method is used for calculating an electricity stealing meter, and accurate electricity stealing meter inspection is realized aiming at the conditions of single-phase electric energy meters and resistance electricity stealing, so that purposeful field inspection is realized, the efficiency is improved, and the loss is recovered.
Detailed Description
The present invention is further illustrated by the following examples.
A method for checking the parallel resistance electricity stealing of a single-phase electric energy meter comprises the following steps: (1) clearing a user meter with the long-term electric quantity of 0 in advance; (2) for the line loss steep increase transformer area, deriving the household meter electric quantity, the total household meter electric quantity and the total household meter electric quantity which are continuously three days after steep increase from the acquisition system; (3) get corresponding
Three matrix, single-phase electric energy meter parallel resistance electricity-stealing mathematical model is
J = 1.. ann, n; (4) substituting three matrices into
The contrast is slightly less than the normal time-day line loss, and at the same time, k is>0, when j corresponds toThe suspicion of electricity stealing exists in the household meter.
A method for checking the parallel resistance electricity stealing of a single-phase electric energy meter comprises the following steps: (1) clearing a user meter with the long-term electric quantity of 0 in advance; (2) for the line loss steep increase transformer area, deriving the household meter electric quantity, the total household meter electric quantity and the total household meter electric quantity which are continuously three days after steep increase from the acquisition system; (3) get corresponding
Three matrix, single-phase electric energy meter parallel resistance electricity-stealing mathematical model is
J = 1.. ann, n; (4) obtaining an approximate value of k according to the ratio of the additional loss electric quantity to the electric quantity of the household meter for three consecutive days; making a difference between the k approximate values of two adjacent days; multiplying the two difference values; the smallest product absolute value is the suspected person of electric larceny.
The method comprises the following steps: load data of at least three continuous time points after the line loss is increased steeply and the line loss value of the transformer area of the day before the line loss is increased steeply and the line loss value of the transformer area of three continuous days after the line loss is increased steeply are as follows: the table area total table load data and the sub-table load data (such as the table area total table and the sub-table daily frozen electric quantity data of three continuous days).
The mathematical model of the parallel resistance electricity stealing of the single-phase electric energy meter is as follows:
In formula 1:
-k: the proportion coefficient of electricity stealing of the household meter.
: technical line loss
The calculation method 1: and performing parameter estimation on the model parameters by using a least square method.
The calculation method 2: simplifying the version electricity stealing index: "daily electric quantity ratio and difference product"
The electricity stealing proportion based on the electricity stealing of the parallel resistors is fixed and is the proportion of the CT of the electricity meter and the parallel resistors. Equation 1 is transformed into an optimization problem.
The first step is as follows: obtaining an approximate value of k according to the ratio of the additional loss electric quantity to the electric quantity of the household meter for three consecutive days;
the second step is that: making a difference between the k approximate values of two adjacent days;
the third step: the two differences are multiplied.
The smallest product absolute value is the suspected person of electric larceny.
In practical applications, the data base: and aiming at the area with the steep line loss increase, the electric quantity of the household meter, the total electric quantity of the household meter and the total electric quantity of the household meter which are continuously three days after the steep increase are derived from the acquisition system. And the resistance steals electricity, or short circuit ammeter CT with the wire, even if the wire short circuit CT, the ammeter daily electric quantity must not be 0 because of the little resistance of wire, clears away the long-term electric quantity in advance and is 0 household meter.
Three matrices are obtained where j = 1.
For method 1:
and (3) substituting the three matrixes into a formula 2, comparing the data line loss slightly less than the normal time, and simultaneously, k is greater than 0, so that the suspicion of electricity stealing exists in the household meter corresponding to j.
For the method 2:
and (3) substituting the three matrixes into formula 3 to obtain j corresponding to the minimum value d, namely the electricity stealing suspected user.
Claims (2)
1. A method for checking the parallel resistance electricity stealing of a single-phase electric energy meter is characterized by comprising the following steps: (1) clearing a user meter with the long-term electric quantity of 0 in advance; (2) for the line loss steep increase transformer area, deriving the household meter electric quantity, the total household meter electric quantity and the total household meter electric quantity which are continuously three days after steep increase from the acquisition system; (3) get corresponding
Three matrix, single-phase electric energy meter parallel resistance electricity-stealing mathematical model is
J = 1.. ann, n; (4) substituting three matrices into
The contrast is slightly less than the normal time-day line loss, and at the same time, k is>0, the suspicion of electricity stealing exists in the account table corresponding to the j at the moment.
2. A method for checking the parallel resistance electricity stealing of a single-phase electric energy meter is characterized by comprising the following steps: (1) clearing a user meter with the long-term electric quantity of 0 in advance; (2) for the line loss steep increase transformer area, deriving the household meter electric quantity, the total household meter electric quantity and the total household meter electric quantity which are continuously three days after steep increase from the acquisition system; (3) get corresponding
Three matrix, single-phase electric energy meter parallel resistance electricity-stealing mathematical model is
J = 1.. ann, n; (4) k is obtained by the ratio of the extra loss electric quantity to the electric quantity of the household meter for three consecutive daysAn approximation; making a difference between the k approximate values of two adjacent days; multiplying the two difference values; the smallest product absolute value is the suspected person of electric larceny,
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010148387.0A CN111257607A (en) | 2020-03-05 | 2020-03-05 | Method for checking parallel resistance electricity stealing of single-phase electric energy meter |
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| CN202010148387.0A CN111257607A (en) | 2020-03-05 | 2020-03-05 | Method for checking parallel resistance electricity stealing of single-phase electric energy meter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112085403A (en) * | 2020-09-16 | 2020-12-15 | 国网福建省电力有限公司营销服务中心 | Low-voltage transformer area topology identification method based on mixed integer programming |
| CN112362962A (en) * | 2020-11-09 | 2021-02-12 | 张子惠 | Method and device for detecting electric leakage and electricity stealing positions in power grid and electronic equipment |
| CN115453447A (en) * | 2022-09-20 | 2022-12-09 | 南方电网科学研究院有限责任公司 | Online detection method for out-of-tolerance electric meter based on suspected electric meter stepwise compensation rejection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633517A (en) * | 2018-12-27 | 2019-04-16 | 国网湖南省电力有限公司 | The method of split-phase timesharing lookup stealing |
| CN209878853U (en) * | 2019-04-30 | 2019-12-31 | 国网冀北电力有限公司唐山供电公司 | Three-phase five-wire system rural area electricity larceny prevention device |
-
2020
- 2020-03-05 CN CN202010148387.0A patent/CN111257607A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633517A (en) * | 2018-12-27 | 2019-04-16 | 国网湖南省电力有限公司 | The method of split-phase timesharing lookup stealing |
| CN209878853U (en) * | 2019-04-30 | 2019-12-31 | 国网冀北电力有限公司唐山供电公司 | Three-phase five-wire system rural area electricity larceny prevention device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112085403A (en) * | 2020-09-16 | 2020-12-15 | 国网福建省电力有限公司营销服务中心 | Low-voltage transformer area topology identification method based on mixed integer programming |
| CN112085403B (en) * | 2020-09-16 | 2022-05-10 | 国网福建省电力有限公司营销服务中心 | Low-voltage transformer area topology identification method based on mixed integer programming |
| CN112362962A (en) * | 2020-11-09 | 2021-02-12 | 张子惠 | Method and device for detecting electric leakage and electricity stealing positions in power grid and electronic equipment |
| CN115453447A (en) * | 2022-09-20 | 2022-12-09 | 南方电网科学研究院有限责任公司 | Online detection method for out-of-tolerance electric meter based on suspected electric meter stepwise compensation rejection |
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Application publication date: 20200609 |