CN104237590B - A kind of active anti-electricity-theft device and the method for strong magnetic stealing compensation measurement - Google Patents
A kind of active anti-electricity-theft device and the method for strong magnetic stealing compensation measurement Download PDFInfo
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Abstract
Patent of the present invention discloses a kind of active anti-electricity-theft device and the method for strong magnetic stealing compensation measurement, and the apparatus and method include：Front-end data collection module, signal conditioning circuit, electricity stealing judgement, identification module, if it is determined that stealing, then take different treatment measures according to the difference of electricity filching means.Particularly, when carrying out stealing using strong magnetic, interference is removed very much by force because it is disguised and recovers normal, therefore need to compensate metering to strong magnetic stealing, to facilitate expansion inspecting.The method of strong magnetic stealing compensation measurement, the step of below figure.Using the present invention, the level of intelligence and automatization level of anti-electricity-theft device are greatly improved, is advantageous to inspector's emphasis inspection evidence obtaining, and make respective handling in time.
Description
Technical field
Patent of the present invention is related to on-line monitoring and electric energy metrical field, is related to a kind of active anti-electricity-theft device and is directed to
Strong magnetic stealing compensation measurement method.
Background technology
In recent years, power network development is rapid, and personal and enterprise power consumption sharply increases.Needed in face of growing electricity consumption
Ask, some illegal enterprises and individuals illegal wiring, reequip electric energy measuring equipment to reach the mesh of stealing to seek economic interests
's.According to the conservative statistics of certain state, the annual stolen electricity of certain state is at least more than 2,000,000,000 kilowatt hours, according to 0.4 yuan of average electricity price
Calculate, for direct economic loss up to more than 800,000,000 yuan, this does not include the maintenance cost of the equipment such as damage metering token, circuit also.
Capital equipment of the electric energy meter as electric quantity metering, it is the equipment that electricity filching person focuses on to pay close attention to.From the stealing found in the past
From the point of view of case, electricity filching means now are more various, and the behavior of stealing is also more hidden.Such as perseverance is applied around in electric energy meter CT
Fixed high-intensity magnetic field, so that metering current reduces, to reach the purpose of stealing；Or apply at electric energy meter radio-sensitive position high
Frequency high-power wireless electrical interference, the normal work of electric energy measuring equipment is upset, to reach the purpose of stealing；Or directly to electric energy meter
Apply destructive repacking to reach stealing purpose etc..
Such as certain state, at present, existing anti-electricity-theft device and method and imperfection, many problems be present.Its subject matter is such as
Under：
(1) preventing electricity theft for power network device carries out single protection mainly for 0.4KV user sides metering device, such as using special counter,
Load control unit or long-distance meter-reading system, and because electricity filching means are more, any device for single electricity filching means is obvious not
It can meet to require, and existing anti-electricity-theft device does not have the function of compensating the electricity of few metering, it is necessary to artificial
Calculated；
(2) traditional inspection relies primarily on artificial business generaI investigation, and poor in timeliness, generaI investigation are not in place, it is difficult to grasp match somebody with somebody in real time
The operation conditions of power network, can not accurately provide time, place and the related data of electricity stealing generation, and verification is difficult；
(3) existing distribution net work structure is complicated, and measuring equipment is more, it is impossible to accomplishes monitoring in real time and record, for some
During high-tech means stealing, existing equipment and measure are helpless.For example, constant high-intensity magnetic field causes electric energy metrical to miss close to CT
The electricity filching means of difference；
Therefore, for full maintenance power supply enterprise and user's economic interests, electricity stealing is hit, research and development are active anti-electricity-theft
Device just seems particularly significant.
The content of the invention
The present invention mainly solves the technical problem present in prior art；Electric energy meter work can be monitored by providing one kind
State, finding stealing and identify electricity filching means, electricity stealing is handled, record storage facilitates inspector's emphasis inspection,
Strong protects a kind of active anti-electricity-theft device of electric company and the economic interests of users and for strong magnetic stealing
The method of compensation measurement.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：
A kind of active anti-electricity-theft device, it is characterised in that including:
One front end signal acquisition module：Electric energy meter working condition, the line current and line voltage of user's electric wire are gathered, and
Monitor whether electric energy metering box has illegally unpacking behavior by an optoelectronic switch, and the signal collected is changed into voltage letter
Number；The front end signal acquisition module includes：
One magneto-dependent sensor：Magnetic field intensity for monitoring and metering device sensitive part；
One electric energy meter observation circuit：For monitoring the working condition of electric energy meter；
One photoswitch circuit：For having monitored whether behavior of illegally unpacking；
One voltage, current transformer are used to gather the electric current of inlet wire, magnitude of voltage and contrasted with corresponding measurement value, and judgement is
No stealing；
One signal conditioning circuit, for being sent into after front end measured signal is changed into the signal that can receive for single-chip microcomputer
Stealing judgement, identification module；
One stealing judgement and identification module：Receive the voltage signal that front signal acquisition module is sent
And the working condition of electric energy meter is judged according to the voltage signal, once it is judged as abnormality, according to the dry of monitoring
Signal is disturbed, electricity filching means are recognized, and sends identification result；
One main control module：Stealing judgement and the identification result that identification module is sent are identified, takes corresponding control measure,
And stealing time, electric energy meter numbering, the information of stealing mode are converted into the data format that can be sent and are ready for sending, and drive
Output action module action；
One output action module：Order according to main control module is alarmed or tripped；
One first communication module and second communication module：The first communication module 4 and second communication module communicate
Carry out the reception or transmission of data；
One remote data storehouse:The job information for each electric energy meter that main control module is sent by communication module is received,
And establish files on each of customers and be included into stealing database, when electricity stealing occurs, it is positioned, and notify user to enter traveling one
The processing of step, when for strong magnetic stealing when, calculate its stealing electricity；
One power supply module：Module for the power supply of above-mentioned needs is powered；
The front signal acquisition module, stealing judgement and identification module, main control module, first communication module connect successively
Connect；Output action module is also associated with the main control module；The second communication module is connected with remote data storehouse.
In a kind of above-mentioned active anti-electricity-theft device, the stealing judgement and identification module are single-chip microcomputer, using model
For PIC16F877 single-chip microcomputer.
In a kind of above-mentioned active anti-electricity-theft device, the main control module is single-chip microcomputer.
In a kind of above-mentioned active anti-electricity-theft device, communication module communicated by RS485 communication protocols with industrial computer and
Wirelessly communicated with host computer, wherein the interface core to be communicated using the MAX485 chips of MAXIM companies as RS485
Piece, the interface chip of radio communication is used as using PTR4000 chips.
In a kind of above-mentioned active anti-electricity-theft device, power supply module is taken through power transformer from line
Power taking, photovoltaic conversion is carried out using LM7812, LM7805 chip afterwards, to need the module for power supply powered, and made with battery
For stand-by power supply.
In a kind of above-mentioned active anti-electricity-theft device, described remote data storehouse is made up of industrial computer.
A kind of method carried out using active anti-electricity-theft device for strong magnetic stealing compensation measurement, it is characterised in that：Bag
Include following steps：
Step 1, the magneto-dependent sensor in front signal acquisition module collects high-intensity magnetic field information；Electric energy meter observation circuit is distinguished
Electric energy meter CPU RESET, VCC, DC/DC output current size information is collected in monitoring, and these information are completely converted into voltage
Signal；Whether optoelectronic switch observation circuit is collected illegally unpacking behavior；Line electricity is collected by front end electric current, voltage transformer
Pressure, line current size information；Information above is sent into next step stealing judgement and identification module after modulate circuit is nursed one's health；
Step 2, stealing judgement and identification module judge whether that electricity stealing occurs by the information of collection, by front-end collection
Line voltage, line current data judge that is, line current, line voltage be asymmetric and numerical exception, then there is electricity stealing in explanation；Such as
Fruit has electricity stealing, determines whether high-intensity magnetic field stealing, i.e., the magnetic field intensity being collected into according to front end magneto-dependent sensor is big
Small and direction, if the magnetic field intensity now measured has exceeded normal magnetic field intensity and reached the magnetic that can influence metering
The threshold value of field intensity, then it is judged as high-intensity magnetic field stealing；Judge that now magnetic field intensity is normal if not less than threshold value, exclude strong magnetic
Field stealing, into other electricity filching means determining programs；And selection is carried out according to judged result and performs following steps：
Select step 1：If high-intensity magnetic field stealing, sensor position magnetic field intensity is detected using magneto-dependent sensor
Size and Orientation, compare the error curve under strong magnetic influence, substitute into and carry out error calculation, i.e. be bent to the error under high-intensity magnetic field
Line carries out piece-wise linearization, then according to the size of front end magnetic field intensity, it is determined that corresponding slope, by δ=kx× B is obtained；By
It is typically all by strong magnet absorption on electric energy meter in such stealing, so general magnetic field intensity is constant, takes repeatedly to calculate and ask
Average value；According to the anti-electricity for releasing stealing of error amount, in real time record, and being communicated with host computer；Finally by remote data
Storehouse carries out electric energy meter numbering, record, establishes user's stealing archives；
Select step 2：If not high-intensity magnetic field stealing, judges whether according to the monitoring information of electric energy meter observation circuit first
Work, if monitoring that RESET, VCC, single-chip microcomputer feeding-dog signal are abnormal, it can be determined that now electric energy meter can not work,
There is stealing accident, then stealing type is judged by comprehensive other information, alarm is then sent by device and acted
Tripping operation, while electrical energy meter fault information is sent to host computer, through communication module typing remote subscriber archives and stealing database, by
Remote data storehouse sends stealing failure notification to the staff of correlation.
In the method for strong magnetic stealing compensation measurement of foregoing description, ferro-magnetic excitation curve uses J-A models.
Therefore, the invention has the advantages that：1. simple in construction reasonable in design, noise is smaller and complete practicality；It is 2. whole
The output zero point of test device will not variation with temperature and change, thus largely reduce test error；3. will not
Make the output signal generation of whole device non-linear.
Brief description of the drawings
Fig. 1 is the attachment structure schematic diagram of active anti-electricity-theft device provided by the invention.
Fig. 2 is the method flow schematic diagram of strong magnetic stealing compensation measurement method provided by the invention.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment：
As shown in figure 1, a kind of active anti-electricity-theft device of the present invention, including front signal acquisition module 1, stealing is sentenced
Fixed, identification module 2, main control module 3, communication module 4, power module 5, output action module 6, and remote data storehouse 8 (on
Position machine) etc., in this example for the electric energy meter of three-phase four-wire system.
Front end signal acquisition module 1, in electric energy meter CT positions installing magneto-dependent sensor (using Hall element), enter in user
Line goes out hidden installation electric current, voltage transformer monitoring line current and line voltage, light commutation circuit is installed at electricity box enabling, from electricity
Signal can be drawn to monitor electric energy meter working condition in table, the signal finally collected by more than is sent into signal conditioning circuit, by
Signal conditioning circuit changes into the interference signal of collection the voltage signal that can be received by single-chip microcomputer.
Stealing judgement, identification module 2, this module is connected with signal conditioning circuit and main control module, for front end
Collection signal is analyzed, and is contrasted, electricity stealing is judged, and then it is identified with historical data.It is if for example, preceding
Section Current Mutual Inductance measured value is bigger than the transformer current numerical value of corresponding electric energy meter, and front voltage transformer and corresponding electric energy meter
Voltage is identical before electric resistance partial pressure, and now magneto-dependent sensor has monitored magnetic interference without other interference, it is possible to judges stealing
Behavior occurs, and is outside constant strong magnetic stealing.Now related data is recorded, sent to master control molding connected below
Block.
Main control module 3, this module are connected with stealing judgement, identification module and output action module, sentenced according to previous step
Fixed, recognition result (example, strong magnetic stealing), takes corresponding control measure (searching corresponding error according to magnetic field intensity), and by stealing
Time, electric energy meter numbering, the information of stealing mode are converted into the data format that can be sent and are ready for sending, and drive actions module
Action.
Communication module 4 and 7, is connected with main control module, and wirelessly exchanges data with remote data storehouse, with
RS485 communication interfaces communicate with other computers；
Power supply module 5, working power is provided for single-chip microcomputer, and driving power is provided for relay, its by LM7805,
LM7812 chips and batteries into；
Output action module 6, this module are connected with main control module and 220V switch normally-closed contacts, supplied by power module
Electricity, and alarmed or tripped according to the order of main control module.；
Remote data storehouse 8, this module are established a communications link by way of radio communication with main control module, and carry out data
Exchange.The selection of remote data storehouse is industrial computer or PC in the present invention.
In accompanying drawing 19 be various kinds of sensors circuit (electric current, voltage transformer, photoswitch circuit, electric energy meter observation circuit,
Hall sensor etc.), 10 be signal conditioning circuit.
Referring to the drawings 2, according to another aspect of the present invention, the method that strong magnetic stealing compensation measurement is also provided, including following
Step：
Step S101, front end sensors collect high-intensity magnetic field information；
In the present embodiment, positioned at the magneto-dependent sensor of electric energy metering box sensitive part, to monitor the size of strong magnetic, and will supervise
Survey result and be sent into signal conditioning circuit, finally handled by main control module
Step S102, judge whether that electricity stealing occurs by the information of collection, if electricity stealing occurs, judgement is
No is high-intensity magnetic field stealing；
Step S103, according to relevant parameter, compare the error curve under strong magnetic action, substitute into carry out error calculation (due to
Such stealing is typically all by strong magnet absorption on electric energy meter, so general magnetic field intensity is constant, can take multiple calculating
Average)；
Step S104, according to the anti-electricity for releasing stealing of error amount, record in real time drives output action module, and with it is upper
Position machine is communicated；
Step S105, electric energy meter numbering is carried out by host computer, record, establishes user's stealing archives.
The above-mentioned magnetic material is ultracrystallite, and the calculating of excitation curve uses J-A models.
Active anti-electricity-theft device provided by the present invention, by front end monitoring signals, is handled signal, judges to know
The species of other stealing, and recorded according to the different degrees of and customer data base of stealing, corresponding measure is taken, alarm is performed or jumps
Lock order.Using the present invention, a variety of electricity filching means for electric energy meter can be effectively prevented, accurately, timely finds and remembers
Record electricity stealing, establish customer data base, facilitate inspector purposefully to carry out emphasis monitoring, be beneficial to safeguard electric company and
Users' interests, ensure power supply safety.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (1)
- A kind of 1. method for strong magnetic stealing compensation measurement, it is characterised in that：This method comprises the following steps：Step 1, the magneto-dependent sensor in front end signal acquisition module collects high-intensity magnetic field information；Electric energy meter observation circuit monitors respectively Electric energy meter CPU RESET, VCC, DC/DC output current size information are collected, these information are completely converted into voltage letter Number；Whether optoelectronic switch observation circuit is collected illegally unpacking behavior；Line electricity is collected by front end electric current, voltage transformer Pressure, line current size information；Information above is sent into next step stealing judgement and identification module after modulate circuit is nursed one's health；Step 2, stealing judgement and identification module judge whether that electricity stealing occurs by the information of collection, by the line of front-end collection Voltage, the judgement of line current data, i.e. line current, line voltage asymmetry and numerical exception, then illustrate electricity stealing occur；If Electricity stealing occurs, and determines whether high-intensity magnetic field stealing, i.e., the magnitude of field intensity that is collected into according to front end magneto-dependent sensor and Direction, if the magnetic field intensity now measured exceeded normal magnetic field intensity and having reached can influence metering magnetic field it is strong The threshold value of degree, then it is judged as high-intensity magnetic field stealing；Judge that now magnetic field intensity is normal if not less than threshold value, exclude high-intensity magnetic field and steal Electricity；And selection is carried out according to judged result and performs following steps：Select step 1：If high-intensity magnetic field stealing, the big of sensor position magnetic field intensity is detected using magneto-dependent sensor Small and direction, the error curve under strong magnetic influence is compareed, substitute into and carry out error calculation, i.e. the error curve under high-intensity magnetic field is entered Row piece-wise linearization, then according to the size of front end magnetic field intensity, it is determined that corresponding slope, by δ=kx× B is obtained, wherein kxFor Corresponding slope, δ are error amount；Because such stealing is typically all by strong magnet absorption on electric energy meter, so general magnetic field Intensity is constant, takes repeatedly to calculate and averages；According to the anti-electricity for releasing stealing of error amount, in real time record, and and host computer Communicated；Electric energy meter numbering is finally carried out by remote data storehouse, record, establishes user's stealing archives；Select step 2：If not high-intensity magnetic field stealing, judges whether work according to the monitoring information of electric energy meter observation circuit first, It if monitoring that RESET, VCC, single-chip microcomputer feeding-dog signal are abnormal, can be determined that now electric energy meter can not work, occur Stealing accident, then by integrated information stealing type is judged, alarm is then sent by device and acts tripping operation, simultaneously Electrical energy meter fault information is sent to host computer, through communication module typing remote subscriber archives and stealing database, by remote data Storehouse sends stealing failure notification to the staff of correlation.
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| CN109061261B (en) * | 2018-06-19 | 2020-12-08 | 广东电网有限责任公司潮州供电局 | Strong magnetic electricity stealing prevention method with compensation metering |
| CN109142831B (en) * | 2018-09-21 | 2021-05-07 | 国网安徽省电力公司电力科学研究院 | Impedance analysis-based method and device for studying and judging abnormal electricity consumption of residential users |
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