CN102445578A - Electricity stealing prevention inspecting and monitoring detector - Google Patents
Electricity stealing prevention inspecting and monitoring detector Download PDFInfo
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Abstract
The invention discloses an electricity stealing prevention inspecting and monitoring detector. A current wireless acquisition module is communicated with an intelligent meter module through a Bisbee network, and is also in signal communication with an inspecting and monitoring computer through a GPRS(General Packet Radio Service)/CDMA(Code Division Multiple Access) network transmitter. A meter front current detection module circuit is mounted in a current wireless acquisition circuit, and an intelligent meter module circuit is mounted in the intelligent meter module. The electricity stealing prevention inspecting and monitoring detector provided by the invention can effectively prevent the unlawful phenomenon of electricity stealing and reduce loss of the power supply department, and has functions of data remote transmission and networked management, so that the detector can conveniently monitor the act of electricity stealing, reduce electricity stealing prevention cost of the power supply department and improve the level of intelligent management on electricity stealing prevention. The electricity stealing prevention inspecting and monitoring detector is suitable for being used in power consumption management of the power sector.
Description
Technical field
The invention belongs to the electric system anti-theft electricity technology, relate to the construction of checking supervisory system and the device of disguised anti-electricity-theft detection, specifically anti-electricity-theft inspection monitoring and detection device.
Background technology
Along with China's economy increases continuously and healthily, commercial power significantly increases, some enterprise for work for undue profits, reduce production costs, stealing electricity phenomenon increases year by year.Owing to adopt the extensive application of the electronic electric energy meter that anti-electricity-theft chip is housed; The stealing electricity method of tradition change circuit in table is controlled basically; So some units adopts more bold stealing electricity method, the direct outside line of lead-in wire or cut-out electric energy meter before table, promptly electric current does not pass through electric energy meter; Electric energy meter can not measure voltage, and this makes the electricity anti-theft method of having taked at present all lose effect.So construction is checked supervisory system accordingly and is developed a kind of disguised stealing detector ten minutes necessity with the preceding current sense function of table.
The development of anti-theft electricity technology develops to the appearance of electricity filching behavior and the progress of modern technologies.Early stage anti-theft electricity technology is whether the stop-off lacquer to the holding screw of WT-MSR is destroyed and carries out stealing and judge that the influence that is subject to environment, weather etc. because of seal comes off naturally, causes the stealing erroneous judgement to break, and does not use at present.In recent years, many experiences on anti-theft electricity technology, have been accumulated.At present, the technical measures of anti-electricity-theft employing mainly contain sealing False proof seal, electricity-stealing prevention metering tank, anti-electricity-theft electric energy meter, power supply metering monitor, load monitoring system bidirectional terminal, WT-MSR fault locator.These anti-electricity-theft devices and measure have been played the effect of effectively preventing to some electricity filching behaviors.Current measures of anti-stealing electricity prevent on the various electricity filching behavior abilities fairly perfect and ripe; And on some other function and performance index, also differ from one another; The direction that forward adapts to user and electric power modern management demand develops, as discovering and seizing electricity filching behavior timely and accurately and for remedying electric weight accurate data being provided.But for specialization day by day, high-technicalization, hidden electricity filching behavior; Existing measures of anti-stealing electricity still has certain weak point; Be mainly reflected in the following aspects: 1. limitation is big; These anti-electricity-theft devices and measure consider a problem to a certain or several kinds of electricity filching means basically, and be still powerless to electricity filching behavior more specialized, hiddenization; 2. real-time is poor, and a lot of electricity filching behaviors is not to WT-MSR, and existing anti-electricity-theft device and measure almost consider a problem round WT-MSR all, therefore can not make timely reaction to some electricity filching behaviors; 3. poor reliability, some measures of anti-stealing electricity are anti-electricity-theft for realizing, influences the operate as normal of electric energy meter, and it is inaccurate to a certain extent to cause the electric energy meter electric energy to measure, poor reliability; 4. cost is higher, and anti-electricity-theft device adopts the shared proportion of the scheme of special IC increasing, metered scheme design application of complex, and cost is higher.
Mainly containing following measure aspect the anti-theft electricity technology measure abroad: adopt special-purpose batch meter or special-purpose ammeter box; This measure all has preventive effect to five kinds of stealing gimmicks; Be applicable to the user of various power supply modes; But require batch meter or ammeter box to want enough firm, and the pick-proof problem key or chamber door; The conductor of sealing transformer low voltage leading-out terminal to WT-MSR, this measure is mainly used in and prevents no table stealing, simultaneously to adopt under-voltage method, undercurrent method, phase-shifting method stealing that certain preventive effect is also arranged through secondary line.Be applicable to the high low meter transformation user that supplies, the scope of application is too little.
The company of domestic-developed supervisory system and stealing detector seldom, the ripe company of product has only two or three family, but uses seldom, the dynamics of marketing also very a little less than, limitation is very big; Other have four, five companies just to release notion and propaganda, but unripe product.Shortcoming such as domestic novel anti-electricity-theft electric power meter exists complicated circuit, function singleness, cost an arm and a leg.Press for inspection supervisory system and disguised stealing detector in the practical work, require that function is many, characteristics such as rich interface, cheap, accuracy height, be convenient to realize the scientific management of electric energy.
According to the at present generation of novel illegal stealing electricity phenomenon and the bottleneck of above-mentioned domestic and international research, be in particular before the solution table direct lead-in wire or cut off electric energy meter outside line wait class stealing problem.Design the module of the preceding current detecting of table of disguised stealing detector, the generation of fundamentally stopping stealing electricity phenomenon.Therefore the disguised stealing detector of being invented is based on three-phase power supply system; While is for the ease of the management of electrical network; And to the real-time monitoring of stealing electricity phenomenon; Also develop the real-time monitoring system of the detector network being managed control and data acquisition, Surveillance center, realize anti-electricity-theft and stealing early warning, accomplish the unitary construction of inspection supervisory system.
Summary of the invention
In order to overcome the existing existing shortcoming of anti-electricity-theft device, the present invention proposes a kind of anti-electricity-theft inspection monitoring and detection device.This device solves anti-electricity-theft technical matters through the Combination application of preceding current sensing means of table and intelligent electric meter module.
The scheme that technical solution problem of the present invention is adopted is:
The electric current wireless acquisition module communicates with the intelligent electric meter module through the Zigbee wireless network transmitter; And through GPRS/CDMA Network Transmission device with check the supervisory control comuter phase signals and be communicated with; Constitute the inspection supervising device; Wherein: the preceding current detection module of table is housed in the current acquisition module, and its circuit bank becomes: current sampling circuit is connected with effective value conversion circuit and voltage amplifier circuit in succession, and voltage amplifier circuit interconnects with microcontroller again with after the A/D sample circuit is connected again; Microcontroller and wireless transmission circuit interconnect, simultaneously because the connection of effective value conversion circuit.Wherein: the intelligent electric meter module is housed in the intelligent electric meter module; Its circuit bank becomes: battery is the single-chip microcomputer power supply; Single-chip microcomputer is connected with the mutual circuit of alarm and pilot lamp; Zigbee wireless communication module, GPRS module interconnect with single chip circuit respectively, and 485 interfaces, jtag interface and carrier module interconnect with single-chip microcomputer respectively.
Good effect; Inspection supervisory system of the present invention can prevent the generation of illegal stealing electricity phenomenon effectively, reduces the loss of power supply department, and this device possesses the function of remote data transmission and network management; Monitoring is convenient, can reduce the anti-electricity-theft cost of power supply department.Along with the three-phase large user is more and more, power consumption is also increasing, and stealing electricity phenomenon also often takes place simultaneously, and the present invention can improve anti-electricity-theft intelligent management level, reduces the loss of power department.Use in the suitable power department management of power use.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a current acquisition modular circuit block scheme of the present invention
Fig. 3 is an intelligent electric meter modular circuit block scheme of the present invention
Among the figure, 1. current acquisition wireless module, 2. Zigbee Network Transmission device, 3. intelligent electric meter module, 4.GPRS/CDMA Network Transmission device; 5. inspection supervisory control comuter, 1.1. wireless transmission circuit, 1.2. microcontroller, 1.3.A/D sample circuit; 1.4. voltage amplifier circuit, 1.5. effective value conversion circuit, 1.6. current sampling circuit, 3.0. battery; 3.1. the Zigbee wireless communication module, 3.2.GPRS module, 3.3.485 interface, 3.4.JTAG interface; 3.5. carrier module, 3.6. alarm, 3.7. pilot lamp, 3.8. single-chip microcomputer.
Embodiment
The inspection supervising device is formed:
According to shown in Figure 1, electric current wireless acquisition module 1 communicates with intelligent electric meter module 3 through Bisbee Network Transmission device 2, and is communicated with inspection supervisory control comuter 5 phase signals through GPRS/CDMA Network Transmission device 4.
The preceding current detection module of table is housed in the electric current wireless acquisition module.
The current detection module circuit is formed before the table:
According to shown in Figure 2; Current sampling circuit 1.6 is connected with effective value conversion circuit 1.5 and voltage amplifier circuit 1.4 in succession; Voltage amplifier circuit interconnects with microcontroller 1.2 again with after A/D sample circuit 1.3 is connected again; Microcontroller and wireless transmission circuit 1.1 interconnect, and are connected with the effective value conversion circuit again simultaneously.
(1), current sampling circuit partly is that the magnitude of current in the circuit is converted into measurable magnitude of current, and finally is converted into the major equipment of voltage, what adopt usually is current transformer, and in the secondary terminals parallel resistance of mutual inductor.
(2), the effect of effective value conversion circuit be with adopt instantaneous voltage convert the process of effective value to, it is quick to require to have transfer process, precision is high, bandwidth, characteristics such as temperature influence is little require the power consumption must be enough low simultaneously.
(3), because effective value conversion circuit output is less and be negative level relatively, so need the one-level operational amplification circuit, require the linearity good, low in energy consumption, lack stabilization time.
(4), D the effect of sample circuit be to convert the analog quantity of amplifying into can supply microcontroller to use digital quantity through operational amplification circuit, transfer process requires that resolution is high, switching rate is fast, quantization error is little, the linearity is good.
Current monitoring before the table:
The table before current sensing means be with the Zigbee wireless network module as main body module, regularly obtain electric energy meter front end electric current and be sent to the intelligent electric meter module through the current acquisition circuit, with intelligent electric meter module communication mode be the Zigbee wireless communication; Intelligent electric meter module and electric energy meter communicate through the RS485 interface mode; Regularly obtain current sensing means transmits before the table current value and with the current effective value that from electric energy meter, the reads calculating of comparing; When exceeding certain limit, send to concentrator or check supervisory control comuter; Notify the generation of stealing incident, and cut off the electricity supply the time that the record stealing takes place then.
(1) current detection module is adopted to such an extent that send the data to the wireless portion of intelligent electric meter module behind the current effective value of alternating circuit through the ZigBee wireless network.
(2) the intelligent electric meter module is connected with electric energy meter through 485 buses, from electric energy meter, reads current effective value according to state's net related communication stipulations, and the ZigBee wireless portion of intelligent electric meter module is passed to data through serial ports the single-chip microcomputer of main body module simultaneously.In single-chip microcomputer relatively the difference of the current value that reads of the current value that records of current detection module and intelligent electric meter module whether in certain scope.If in certain scope, then single-chip microcomputer produces sleep signal, gets into dormant state through ZigBee wireless network control current detection module.If not in certain scope, then do not send sleep signal, continue relatively both adopt the size of electric current, if continuous 3 times go beyond the scope, then be judged to be stealing electricity phenomenon and taken place, cut off circuit and write down simultaneously the time that stealing electricity phenomenon takes place.
(3) if stealing electricity phenomenon takes place; The intelligent electric meter module can be uploaded to the inspection supervisory control comuter through the GPRS wireless network; Notice supervisory system stealing electricity phenomenon takes place, and can accurately judge the stealing user and can calculate its power-steeling quantity, has prevented multiple stealing electricity method effectively.
(4) inspection supervisory control comuter monitoring software platform operates on PC and the compatible thereof; Use WINDOWS operating system; Hardware connects the GPRS module through serial ports to be realized communicating by letter with concentrator; Adopt the design of menu and graphic interface, possess that all concentrators of real-time monitoring and every concentrator are divided into the intelligent electric meter module, made a copy of all information datas, the partial data library storage of lower part equipment, the setting and the functions such as control, system information demonstration of concentrator duty.
The intelligent electric meter module is housed in the intelligent electric meter module.
The intelligent electric meter modular circuit is formed:
According to shown in Figure 3; Battery 3.0 is single-chip microcomputer 3.8 power supplies; Single-chip microcomputer is connected with pilot lamp 3.7 mutual circuit with alarm 3.6; Zigbee wireless communication module 3.1, GPRS module 3.2 interconnect with single chip circuit respectively, and 485 interfaces 3.3, jtag interface 3.4 and carrier module 3.5 interconnect with single-chip microcomputer respectively.
(1), master controller part is as the core of intelligent electric meter module, accomplishes the driving and the Control work of all circuit.
(2), pilot lamp partly mainly as the alarm indication device of the abnormal conditions that possibly occur, is lighted pilot lamp when abnormal conditions take place.
(3), the Zigbee wireless network transmissions partly be used for current detection module before the reception table adopt current data, send the control command of intelligent electric meter module to before table current detection module simultaneously.
(4), the GPRS wireless network transmissions partly is used for there not being the occasion of concentrator the stealing information real-time being sent to the inspection supervisory control comuter.
(5), power line carrier, PLC part and wherein one road RS485 communication interface be used for the stealing information uploading to concentrator.
(6), one road RS485 communication interface as with being connected of electric energy meter, to read the electric energy effective value that measures in the electric energy meter.
(7), the part of reporting to the police is used for indicating the current power information of user, send alerting signal and arouse attention if stealing electricity phenomenon takes place to notify the user.
Single-chip microcomputer adopts ATmega128.
The application of inspection monitor system software:
Inspection supervisory control comuter monitoring software platform operates on PC and the compatible thereof; Use WINDOWS operating system; Hardware connects the GPRS module through serial ports to be realized communicating by letter with intelligent electric meter module or concentrator; Adopt the design of menu and graphic interface, possess intelligent electric meter module below all concentrators of real-time monitoring and every the concentrator, make a copy of all information datas, the partial data library storage of lower part equipment, the setting and the functions such as control, system information demonstration of concentrator duty.
Mainly be divided into functions such as account management, information management, regional stealing information management, historical query, Realtime Alerts.
(1) account management mainly is to accomplish the management of user account authority and the work that is provided with of password.
(2) information management function is mainly accomplished regional equipment control, accomplishes work such as the typing of device attribute information, setting and modification.
(3) regional stealing information management function is mainly accomplished the typing work of the real time on-line monitoring and the data message of user's stealing information.
(4) historical query function is mainly accomplished the query of data such as inquiry and the warning message of historical data.
(5) the Realtime Alerts function is used for indicating the current power information of user, arouses attention to notify managerial personnel if the generation stealing electricity phenomenon sends alerting signal.
This invention simultaneously will be carried out correlation test according to relevant criterion for preceding current sensing means of table and intelligent electric meter module under specified requirements, carry out related check according to inspection rule.Carry out the coherent detection test in development, mainly contain earth fault inhibition test, EMC test, consistance test and reliability compliance test.
Correlation test mainly is divided into following components:
1), accuracy test
Current sensing means is under reference condition before the table, fundamental error, starting and shunt running, disguised stealing detector constant, the performances such as the limit of error that caused by other amounts of influence.
2), electrical performance test
Under reference condition, electric properties such as the temperature rise of disguised stealing detector, pulse voltage, anti-earth fault ability should meet the regulation of GB/T17215.211-2006.
A) supply voltage influence test
Supply voltage influence test should meet the regulation of GB/T17215.301-2007.
B) alternating voltage test
C) power consumption
The power consumption of disguised stealing detector voltage circuit, current return should satisfy the low-power consumption regulation.All tests all should be carried out in normal working conditions.
3), electromagnetic compatibility test
EMC test such as the conduction interference immunity to interference of the esd immunity of current sensing means and intelligent electric meter module, radio frequency electromagnetic field immunity to interference, fast transient pulse train immunity to interference, radio-frequency field induction, surge immunity, attenuation oscillasion impulse immunity to interference, radio interference inhibition before the table; After the test, current sensing means and intelligent electric meter module should be able to operate as normal before the table.
4), error consistency test
Disguised stealing detector is after reference voltage, fundamental current load 30min; To same batch of 3～6 indumentum test agents; At reference voltage, 100%Ib (In), 10%Ib (In), power factor 1.0 and 0.5L place, should do not surpassed prescribed limits by the maximum difference of the mean value of the measurement result of test agent and a same test point n sample.Should be used same multi-epitope calibration equipment to test simultaneously by test agent.
5), error variation test
Disguised stealing detector by test agent, at reference voltage, Ib (In), power factor 1.0 and 0.5L place, is done test for the first time to sample to same after reference voltage, fundamental current load 30min; Under the constant condition of test condition at interval behind the 5min, sample is done test for the second time, the absolute value of the difference of twice test result at same test point place should not surpass 0.2%.
6), communication protocol consistency check
Disguised stealing detector is when full performance test or reception test, and testing agency that should be through qualification is arranged in the system of company is to the conforming inspection of communication protocol.Inspection is carried out according to the DL/T645-2007 and the file of putting on record thereof.
7), data line anti-interference test
For what be connected with communication interface, pulse transmission line, data line that length surpasses 2m should carry out the electrical fast transient (eft) immunity experiment.Test is stipulated according to GB/T17215.211-2006, and under following condition, is carried out:
Disguised stealing detector is in normal operating conditions, uses the capacitive coupling folder that trial voltage is coupled to I/O pulse and tie line with the common mode mode.
-harsh grade: 3;
-be coupling in the trial voltage on pulse/data line: 1kV;
-test period: 60s.
Under the effect of pulse train, disguised stealing detector and networking become each equipment of system should not occur damaging, and can operate as normal.After the test, system should be able to operate as normal with communicate by letter.
8), reliability compliance test
The fail-test of disguised stealing detector should be carried out correlation test according to environmental baseline, and the sample factory inspection project that drops into fail-test must be all qualified, before test, finds to have defective item, available qualified samples replacement.
The key of project technical research of the present invention and difficult point:
(1), current detection module gathers go forward side by side line correlation computing and processing of current signal and obtains effective value, and with current effective value through the wireless intelligent electric meter module that is uploaded to of Zigbee.
(2), the intelligent electric meter module has perfect control strategy and judges whether to take place stealing, links to each other with electric energy meter through RS485, communicates according to the relevant national standard stipulations, have abundant communication interface and supply the user to select.
(3), the intelligent electric meter module through the GPRS wireless network with user's stealing information uploading to checking supervisory control comuter, and then the generation of notice supervisory system stealing electricity phenomenon.
(4), intelligent electric meter module and inspection adopted the GPRS/CDMA radio communication between the supervisory control comuter, increased the complicacy and the difficulty of wireless networking.
Technical characterstic of the present invention:
(1), for adapting to market and user's request, design possesses that function is many, the three-phases disguise stealing detector of rich interface, cheap, high characteristics of accuracy;
(2), current detection scheme anti-electricity-theft scheme different from the past before the table that proposes, it designs according to field demand, mounting means is flexible, can effectively stop the illegal stealing electricity phenomenon of various off-balancesheets, can take into account the generation that prevents the phenomenon of stealing in other most numerical tables simultaneously;
(3), make up the inspection supervisory control comuter.Directly upload stealing information, disguised stealing detector is carried out control and management and data acquisition through GPRS.Again concentrator information is passed to Surveillance center through the wireless GPRS communication, the center has information management platform, has realized the scientific management of marketing system.
Inspection supervising device of the present invention can prevent the generation of illegal stealing electricity phenomenon effectively, reduces the loss of power supply department, and this device possesses the function of remote data transmission and network management, and monitoring makes things convenient for, and can reduce the anti-electricity-theft cost of power supply department.Along with the three-phase large user is more and more, power consumption is also increasing, and stealing electricity phenomenon also often takes place simultaneously, and the extensive employing that the present invention checks supervising device can improve anti-electricity-theft intelligent level, reduces the loss of power department, has a extensive future.
Claims (2)
1. anti-electricity-theft inspection monitoring and detection device is characterized in that:
The inspection supervising device is formed: electric current wireless acquisition module (1) communicates with intelligent electric meter module (3) through Bisbee Network Transmission device (2), and is communicated with inspection supervisory control comuter (5) phase signals through GPRS/CDMA Network Transmission device (4);
The preceding current detection module of table is housed in the electric current wireless acquisition module;
The current detection module circuit is formed before the table:
Current sampling circuit (1.6) is connected with effective value conversion circuit (1.5) and voltage amplifier circuit (1.4) in succession; Voltage amplifier circuit interconnects with microcontroller (1.2) again with after A/D sample circuit (1.3) is connected again; Microcontroller and wireless transmission circuit (1.1) interconnect, and are connected with the effective value conversion circuit again simultaneously;
The intelligent electric meter module is housed in the intelligent electric meter module;
The intelligent electric meter modular circuit is formed:
Battery (3.0) is single-chip microcomputer (3.8) power supply; Single-chip microcomputer is connected with the mutual circuit of alarm (3.6) and pilot lamp (3.7); Zigbee wireless communication module (3.1), GPRS module (3.2) interconnect with single chip circuit respectively, and 485 interfaces (3.3), jtag interface (3.4) and carrier module (3.5) interconnect with single-chip microcomputer respectively.
2. anti-electricity-theft inspection monitoring and detection device according to claim 1 is characterized in that: single-chip microcomputer adopts the ATmega128 model.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103954815A (en) * | 2014-04-30 | 2014-07-30 | 国网上海市电力公司 | Electricity larceny prevention check main machine |
| CN103954816A (en) * | 2014-04-30 | 2014-07-30 | 国网上海市电力公司 | Inelegant remote anti-electricity-stealing inspection method |
| CN107390572A (en) * | 2017-06-26 | 2017-11-24 | 国网山东省电力公司宁津县供电公司 | A kind of long-range oppose electricity-stealing checks warning device and method of opposing electricity-stealing |
| CN108664990A (en) * | 2018-03-29 | 2018-10-16 | 清华大学 | The stealing detection method and device of comprehensive entropy method and Density Clustering method |
| CN113009219A (en) * | 2021-01-26 | 2021-06-22 | 江阴长仪集团有限公司 | Intelligent electric energy meter based on broadband carrier module |
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| CN1042239A (en) * | 1988-10-27 | 1990-05-16 | 沈阳市永胜电器厂 | A kind of device for preventing stealing electricity from electric meter |
| CN1060359A (en) * | 1991-10-08 | 1992-04-15 | 焦作市新新应用技术研究所 | Arrangement on watt-hour meter for avoiding fraudulent use |
| CN201075117Y (en) * | 2007-03-05 | 2008-06-18 | 哈尔滨智通科技有限公司 | Single phase electric energy meter capable of avoiding fraudulent use of electricity |
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| CN201569701U (en) * | 2009-12-29 | 2010-09-01 | 中国电力科学研究院 | Single phase remote charge intelligent ammeter |
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| CN201903768U (en) * | 2010-11-26 | 2011-07-20 | 山西省电力公司吕梁供电分公司 | Wireless acquisition device for client electricity consumption condition |
| CN201956930U (en) * | 2010-12-03 | 2011-08-31 | 山东电力集团公司菏泽供电公司 | Novel electric system capable of preventing electricity from being stolen based on GFSK wireless data communication technology |
| CN102023246A (en) * | 2010-12-13 | 2011-04-20 | 中国电力科学研究院 | Method for integrating intelligent anti-theft electric system with electro-information acquisition system |
| CN201945615U (en) * | 2010-12-28 | 2011-08-24 | 北京电研华源电力技术有限公司 | A single-phase, cost-remote-controlled intelligent meter and automatic meter reading system |
| CN201909811U (en) * | 2010-12-31 | 2011-07-27 | 利尔达科技有限公司 | Three-phase watt-hour meter based on MSP430 singlechip |
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| CN103954815A (en) * | 2014-04-30 | 2014-07-30 | 国网上海市电力公司 | Electricity larceny prevention check main machine |
| CN103954816A (en) * | 2014-04-30 | 2014-07-30 | 国网上海市电力公司 | Inelegant remote anti-electricity-stealing inspection method |
| CN107390572A (en) * | 2017-06-26 | 2017-11-24 | 国网山东省电力公司宁津县供电公司 | A kind of long-range oppose electricity-stealing checks warning device and method of opposing electricity-stealing |
| CN108664990A (en) * | 2018-03-29 | 2018-10-16 | 清华大学 | The stealing detection method and device of comprehensive entropy method and Density Clustering method |
| CN108664990B (en) * | 2018-03-29 | 2020-09-18 | 清华大学 | Electricity stealing detection method and device based on comprehensive entropy method and density clustering method |
| CN113009219A (en) * | 2021-01-26 | 2021-06-22 | 江阴长仪集团有限公司 | Intelligent electric energy meter based on broadband carrier module |
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