CN105158536B - Anti-electricity-theft checking method - Google Patents
Anti-electricity-theft checking method Download PDFInfo
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- CN105158536B CN105158536B CN201510546995.6A CN201510546995A CN105158536B CN 105158536 B CN105158536 B CN 105158536B CN 201510546995 A CN201510546995 A CN 201510546995A CN 105158536 B CN105158536 B CN 105158536B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005611 electricity Effects 0.000 claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 11
- 230000009466 transformation Effects 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical compound [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The present invention relates to a kind of methods that duplicity is avoided to measure electric variable, and in particular to a kind of anti-electricity-theft checking method includes the following steps：The first step checks high pressure measurement current transformer ratio, in-site measurement step down side line voltage, electric current, while makes a copy of the line voltage of high-pressure side metering intelligent meter, electric current, the then current no-load voltage ratio of calculating current mutual inductor, and being compared with its nominal transformation ratio；Second step compares power error, in-site measurement step down side line voltage ULine, each phase current I2U、I2V、I2W, while make a copy of the real-time active-power P of high-pressure side metering intelligent meter1, power-factor cos ∮, calculate each phase average electric current I Afterwards, power error is calculated using error formula；Third walks, and electricity stealing, and taking of evidence are judged whether according to the result of calculation of the first step and second step.The present invention can be calculated according to field measurement data, find electricity stealing in time, reduce loss.
Description
Technical field
The present invention relates to a kind of methods that duplicity is avoided to measure electric variable, and in particular to a kind of anti-electricity-theft checking method.
Background technology
There are many anti-electricity-theft device and the electricity anti-theft system for now referring to electrical network field, such as publication No. is CN102445577A's
Chinese patent discloses a kind of electricity anti-theft system, and as a kind of anti-electricity-theft device of real time monitoring, anti-electricity-theft principle is to set up
, system function is also powerful, but because fund limits, it is unpractical that each electricity consumer, which installs this device, in power grid
This rare system on the Electro-metering device of field, that is, power supply enterprise.
Present power supply enterprise is widely implemented power application user power utilization information acquisition system, and system can monitor client in real time
Power information, such as voltage, electric current, power, power factor, systematic difference is to strike user's stealing and transgression for using electricity behavior
Play the role of very big fright, but user changes the current loop of current transformer ratio or short-circuit metering device privately
We can not discover from system afterwards, can only measure the accurate of meter error judgment user metering by test equipment
Property.For the test of low-pressure side metering, there are many instrument that can be bought in the market, but high-pressure side metering on-line testing meter misses
The equipment of difference currently not yet, although there is the equipment of on-line testing high-tension current, the problems such as due to price and safety, existing company
What is be configured is seldom, and on-the-spot test use is even more rarely seen.
Invention content
To solve the deficiency in above-mentioned technology, it is an object of the invention to：A kind of anti-electricity-theft checking method, Ke Yigen are provided
It is calculated according to field measurement data, finds electricity stealing in time, reduce loss.
To solve its technical problem, the technical solution used in the present invention is：
The anti-electricity-theft checking method, includes the following steps：
The first step checks high pressure measurement current transformer ratio：In-site measurement step down side line voltage, electric current, together
When make a copy of line voltage, the electric current of high-pressure side metering intelligent meter, then calculating current mutual inductor ratio, and with metering current mutual inductance
Device nominal transformation ratio compares；
Second step compares power error：In-site measurement step down side line voltage ULine, each phase current I2U、I2V、I2W, together
When make a copy of the real-time active-power P of high-pressure side metering intelligent meter1, power-factor cos ∮, calculate each phase average electric current IAfterwards, it is sharp
With error formula T=1- { P1* high pressure measurement meter synthesis multiplying power/[(1.732*ULine*I)*cos∮+PIron+PCopper] calculate power mistake
Difference, wherein, PIronFor transformer iron loss, PCopperFor the real-time copper loss of transformer；
Third walks, and electricity stealing, and taking of evidence are judged whether according to the result of calculation of the first step and second step.
During daily power utility check, inspector uses the above method, to high pressure measurement user's high and low pressure side electricity
Stream ratio, voltage ratio are compared with transformer turn ratio, and comparison are measured to transformer both sides power, so as to judge whether
There are stealing suspicion.
Wherein, preferred embodiment is：
The first step and each data of second step are handled and are stored by handheld terminal, and Android can be used in handheld terminal
Mobile phone, tablet etc. change the trouble manually computed after measuring, and according to the calculation formula derived, data calculating link is set
The APP applications that can be run on handheld terminal are counted into, the exploitation of APP belongs to technology well known to those skilled in the art, and emphasis exists
In the calculation formula of the present invention.
If there are stealing suspicion by client, stealing evidence, the card are shot by the handheld terminal for carrying camera for 4th step
Can also be video according to that can be picture, the evidence of inspector's shooting and front calculate the data obtained, can pass through hand
It holds terminal and is sent to operator on duty together, extracted by operator on duty by power information acquisition system each in current acquisition terminal
Item data carries out auxiliary verification.
In-site measurement step down side line voltage is set in the first step as U2UV、U2WV, electric current I2U、I2W, pass through
The current no-load voltage ratio K of high and low pressure side line voltage calculating transformerU, high-pressure side U, W phase current is calculated, if the high-pressure side metering made a copy of
It is U with the line voltage of intelligent meter1UV、U1WV, electric current I1U、I1W, current transformer ratio calculation formula is：ATU=[I2U/
(U1UV/U2UV)]/I1UAnd ATW=[I2W/(U1WV/U2WV)]/I1W, by the two values of calculating and the specified change of metering current mulual inductor
Frequently pair.
In the second step, the real-time copper loss P of transformerCopper=(1.732*ULine*I/SN)2*PShort N, wherein, SNFor transformer
Rated capacity, IFor the average current of low-pressure side three-phase, PShort NFor transformer nominal short-circuit loss power, formulation process is such as
Under:
The practical resistance loss for transformer winding of transformer nominal short-circuit loss power is set as R, nominal short-circuit loss work(
Rate PShort N=3*IN 2* R, INFor transformer rated current, it is assumed that three-phrase burden balance, by PShort N=3*IN 2* R is obtained：
R=PShort N/(3*IN 2)
PCopper=3*IIt is existing 2* R=3*IIt is existing 2*(PShort N/3*IN 2)=(IIt is existing 2/IN 2)*PShort N
=[(SIt is existing/UPhase N)2/(SN/UPhase N)2]*PShort N
=(SIt is existing 2/SN 2)*PShort N=(SIt is existing/SN)2*PShort N
=(1.732*ULine*IIt is existing/SN)2*PShort N
Wherein, IIt is existingAverage current I for three-phase current, UPhase NFor transformer rated voltage, SIt is existingFor the real-time apparent of transformer
Power, SNTransformer rated capacity, ULineFor the real-time line voltage of transformer.
There are two the third step Rule of judgment：
(1) error amount between the first step calculates current transformer ratio and current transformer nominal transformation ratio is more than 5%；
(2) error calculated of second step is more than 5%；
When meeting condition (1) and condition (2) simultaneously, there are stealing suspicion for judgement.
The first step and second step are steady in user power utilization load and when rate of load condensate is more than 30% carries out, under such state
The data reliability higher of acquisition, result of calculation are more accurate.
Compared with prior art, the invention has the advantages that：
The present invention can be calculated according to field measurement data, find electricity stealing in time, reduce loss.Daily
During power utility check, to high pressure measurement user generally using high and low pressure side electric current ratio be equal to voltage ratio (or turn ratio) and
Power equal principle in both sides measures comparison, has received extraordinary effect, and this test method is risen now
Grade changes the trouble of test and manual calculation, and according to the calculation formula derived, data are calculated ring layout into can be
The APP applications run on handheld terminal, avoid the error being likely to occur when manually calculating, APP apply to result of calculation into
Row judgement is thought, there may be that can provide warning during stealing risk, and can preserve original calculation data, scene to be set for electricity consumption
It applies and carries out evidence obtaining of taking pictures.Operator on duty can be sent these data to simultaneously, system is acquired by power information by operator on duty
Each item data that system is extracted in current acquisition terminal carries out auxiliary verification.
Specific embodiment
The embodiment of the present invention is described further below：
Embodiment 1：
Anti-electricity-theft checking method of the present invention, includes the following steps：
The first step checks high pressure measurement current transformer ratio：In-site measurement step down side line voltage, electric current, together
When make a copy of line voltage, the electric current of high-pressure side metering intelligent meter, then calculating current mutual inductor ratio, and with metering current mutual inductance
Device nominal transformation ratio compares；
Second step compares power error：In-site measurement step down side line voltage ULine, each phase current I2U、I2V、I2W, together
When make a copy of the real-time active-power P of high-pressure side metering intelligent meter1, power-factor cos ∮, calculate each phase average electric current IAfterwards, it is sharp
With error formula T=1- { P1* high pressure measurement meter synthesis multiplying power/[(1.732*ULine*I)*cos∮+PIron+PCopper] calculate power mistake
Difference, wherein, PIronFor transformer iron loss, PCopperFor the real-time copper loss of transformer；
Third walks, and electricity stealing, and taking of evidence are judged whether according to the result of calculation of the first step and second step.
During daily power utility check, inspector uses the above method, to high pressure measurement user's high and low pressure side electricity
Stream ratio, voltage ratio are compared with transformer turn ratio, and comparison are measured to transformer both sides power, so as to judge whether
There are stealing suspicion.
The 4th step is further included, if there are stealing suspicion by client, stealing is shot by the handheld terminal for carrying camera and is demonstrate,proved
According to, the evidence can be picture can also be video, the evidence of inspector's shooting and front calculate the data obtained, can be with
Operator on duty is sent to by handheld terminal together, current acquisition terminal is extracted by power information acquisition system by operator on duty
In each item data carry out auxiliary verification.
Wherein, the first step and each data of second step are handled and are stored by handheld terminal, and handheld terminal can be adopted
With Android mobile phone, tablet etc., the trouble manually computed after measuring is changed, according to the calculation formula derived, data are calculated
Ring layout belongs to technology well known to those skilled in the art into the APP applications that can be run on handheld terminal, the exploitation of APP,
Focus on the calculation formula of the present invention.
In-site measurement step down side line voltage is set in the first step as U2UV、U2WV, electric current I2U、I2W, by high and low
Press the current no-load voltage ratio K of side line voltage calculating transformerU, high-pressure side U, W phase current is calculated, if the high-pressure side metering intelligence made a copy of
The line voltage of table is U1UV、U1WV, electric current I1U、I1W, current transformer ratio calculation formula is：ATU=[I2U/(U1UV/
U2UV)]/I1UAnd ATW=[I2W/(U1WV/U2WV)]/I1W, by the two values of calculating and metering current mulual inductor nominal transformation ratio ratio
It is right.
In second step, the real-time copper loss P of transformerCopper=(1.732*ULine*I/SN)2*PShort N, wherein, SNIt is specified for transformer
Capacity, IFor the average current of low-pressure side three-phase, PShort NFor transformer nominal short-circuit loss power, formulation process is as follows:
The practical resistance loss for transformer winding of transformer nominal short-circuit loss power is set as R, nominal short-circuit loss work(
Rate PShort N=3*IN 2* R, INFor transformer rated current, it is assumed that three-phrase burden balance, by PShort N=3*IN 2* R is obtained：
R=PShort N/(3*IN 2)
PCopper=3*IIt is existing 2* R=3*IIt is existing 2*(PShort N/3*IN 2)=(IIt is existing 2/IN 2)*PShort N
=[(SIt is existing/UPhase N)2/(SN/UPhase N)2]*PShort N
=(SIt is existing 2/SN 2)*PShort N=(SIt is existing/SN)2*PShort N
=(1.732*ULine*IIt is existing/SN)2*PShort N
Wherein, IIt is existingAverage current I for three-phase current, UPhase NFor transformer rated voltage, SIt is existingFor the real-time apparent of transformer
Power, SNTransformer rated capacity, ULineFor the real-time line voltage of transformer.
There are two the third step Rule of judgment：
(1) error amount between the first step calculates current transformer ratio and current transformer nominal transformation ratio is more than 5%；
(2) error calculated of second step is more than 5%；
When meeting condition (1) and condition (2) simultaneously, there are stealing suspicion for judgement.
The first step and second step are steady in user power utilization load and when rate of load condensate is more than 30% carries out, under such state
The data reliability higher of acquisition, result of calculation are more accurate.
The present invention can be calculated according to field measurement data, find electricity stealing in time, reduce loss.Daily
During power utility check, inspector uses the above method, to high pressure measurement user's high and low pressure side electric current ratio, voltage ratio with becoming
Depressor turn ratio is compared, and measures comparison to transformer both sides power, so as to judge whether stealing suspicion.
Claims (6)
1. a kind of anti-electricity-theft checking method, which is characterized in that include the following steps：
The first step checks high pressure measurement current transformer ratio：In-site measurement step down side line voltage, electric current, are copied simultaneously
Record the line voltage of high-pressure side metering intelligent meter, electric current, then calculating current mutual inductor ratio, and with metering current mulual inductor volume
Rated transformation ratio compares；
Second step compares power error：In-site measurement step down side line voltage ULine, each phase current I2U、I2V、I2W, copy simultaneously
Record the real-time active-power P of high-pressure side metering intelligent meter1, power-factor cos ∮, calculate low-pressure side three-phase average current I
Afterwards, error formula T=1- { P are utilized1* high pressure measurement meter synthesis multiplying power/[(1.732*ULine*I)*cos∮+PIron+PCopper] calculate
Power error, wherein, PIronFor transformer iron loss, PCopperFor the real-time copper loss of transformer；
Third walks, and electricity stealing, and taking of evidence are judged whether according to the result of calculation of the first step and second step；
In-site measurement step down side line voltage is set in the first step as U2UV、U2WV, electric current I2U、I2W, pass through high and low pressure
The current no-load voltage ratio K of side line voltage calculating transformerU, high-pressure side U, W phase current is calculated, if the high-pressure side metering intelligent meter made a copy of
Line voltage be U1UV、U1WV, electric current I1U、I1W, current transformer ratio calculation formula is：ATU=[I2U/(U1UV/U2UV)]/
I1UAnd ATW=[I2W/(U1WV/U2WV)]/I1W, the two values of calculating and metering current mulual inductor nominal transformation ratio are compared.
2. anti-electricity-theft checking method according to claim 1, which is characterized in that the real-time copper of transformer in the second step
Damage PCopper=(1.732*ULine*I/SN)2*PShort N, wherein, SNFor transformer rated capacity, IFor the average current of low-pressure side three-phase,
PShort NFor transformer nominal short-circuit loss power.
3. anti-electricity-theft checking method according to claim 1, which is characterized in that there are two the third step Rule of judgment：
(1) error amount between the first step calculates current transformer ratio and metering current mulual inductor nominal transformation ratio is more than 5%；
(2) error calculated of second step is more than 5%；
When meeting condition (1) and condition (2) simultaneously, there are stealing suspicion for judgement.
4. anti-electricity-theft checking method according to claim 1, which is characterized in that the first step and each data of second step are led to
Handheld terminal is crossed to be handled and stored.
5. anti-electricity-theft checking method according to claim 1, which is characterized in that the 4th step, by the hand for carrying camera
Hold terminal taking stealing evidence.
6. anti-electricity-theft checking method according to claim 1, which is characterized in that the first step and second step are used in user
It is carried out when electric load is steadily and rate of load condensate is more than 30%.
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| CN113777551B (en) * | 2021-09-09 | 2024-03-15 | 贵州电网有限责任公司 | Current transformer transformation ratio checking method for special line special power user metering device |
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| CN204008785U (en) * | 2014-07-23 | 2014-12-10 | 深圳市易讯利科技有限公司 | Measurement loop fault monitoring system |
| CN104407189A (en) * | 2014-12-02 | 2015-03-11 | 国家电网公司 | Electricity stealing prevention system and method for distribution transformer |
| CN104535813A (en) * | 2015-01-29 | 2015-04-22 | 威胜集团有限公司 | Electricity larceny prevention system and electricity larceny judgment method for large specific power transformer electricity user |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204008785U (en) * | 2014-07-23 | 2014-12-10 | 深圳市易讯利科技有限公司 | Measurement loop fault monitoring system |
| CN104407189A (en) * | 2014-12-02 | 2015-03-11 | 国家电网公司 | Electricity stealing prevention system and method for distribution transformer |
| CN104535813A (en) * | 2015-01-29 | 2015-04-22 | 威胜集团有限公司 | Electricity larceny prevention system and electricity larceny judgment method for large specific power transformer electricity user |
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| Title |
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| 提高电流互感器额定变比引起追补电量的计算;张淑萍等;《科技论坛》;20121231(第4期);第5页 * |
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