CN108303576A - The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter - Google Patents

The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter Download PDF

Info

Publication number
CN108303576A
CN108303576A CN201810088495.6A CN201810088495A CN108303576A CN 108303576 A CN108303576 A CN 108303576A CN 201810088495 A CN201810088495 A CN 201810088495A CN 108303576 A CN108303576 A CN 108303576A
Authority
CN
China
Prior art keywords
electric energy
energy meter
electrical equipment
stealing
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201810088495.6A
Other languages
Chinese (zh)
Other versions
CN108303576B (en
Inventor
闫福录
韩海安
韩霞
曹琼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Measurement Centre Of Guo Wang Shanxi Province Utilities Electric Co
State Grid Corp of China SGCC
Original Assignee
Measurement Centre Of Guo Wang Shanxi Province Utilities Electric Co
State Grid Corp of China SGCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Measurement Centre Of Guo Wang Shanxi Province Utilities Electric Co, State Grid Corp of China SGCC filed Critical Measurement Centre Of Guo Wang Shanxi Province Utilities Electric Co
Priority to CN201810088495.6A priority Critical patent/CN108303576B/en
Publication of CN108303576A publication Critical patent/CN108303576A/en
Application granted granted Critical
Publication of CN108303576B publication Critical patent/CN108303576B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/02Constructional details
    • G01R11/24Arrangements for avoiding or indicating fraudulent use
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/66Testing of connections, e.g. of plugs or non-disconnectable joints
    • G01R31/67Testing the correctness of wire connections in electric apparatus or circuits

Abstract

The present invention relates to by the discriminating method of stealing electric energy meter and error connection electric energy meter, specially by the quick discriminating method of stealing electric energy meter and error connection electric energy meter.It solves the problems, such as to be found in time by stealing electric energy meter and error connection electric energy meter.This method is realized by following steps:1)The variable quantity of active power, reactive power, power factor, load impedance, harmonic component in the case of acquisition or the normal metering of acquisition, and store in the function module of the electric energy meter to installation at the scene;2)The variable quantity of the continuous active power of measuring, reactive power, power factor, load impedance, harmonic component in real time;Band timestamp storage is carried out when a certain variation numerical quantity is more than threshold value;3)By step 2)The obtained variable quantity with timestamp storage and step 1)The respective change amount being stored in advance is compared, and when the value after comparison is higher or lower than given threshold, assert that the electric energy meter of the installation at the scene is by stealing electric energy meter or error connection electric energy meter.

Description

The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter
Technical field
The present invention relates to power supply/electricity consumption monitoring field, specially a kind of quick examination stealing and false wiring of electric energy meter Method has the function of screening and quickly positioning automatically with stealing and false wiring of electric energy meter is directed to.
Background technology
Electricity stealing generation often brings about great losses to power supply enterprise and country.Common stealing mode passes through change The electric current of electric energy meter is accessed, voltage changes structure and mode of connection of meter etc..With the development of technology, the means of stealing and Technical merit is also constantly being promoted, and shows as high-technicalization, and concealment is stronger, and opposing electricity-stealing, it is increasing to investigate and prosecute work difficulty.Surreptitiously Electricity is often modified the wiring of electric energy meter outside or inside circuit, reaches few quantity calculation, underpays the electricity charge or do not pay the electricity charge Purpose.Under conventional situation, line loss is abnormal, and electricity is lost, and often can just be embodied when settling accounts at the end of month.Traditional is thief-proof Electric hand section relatively falls behind, and after electricity stealing occurs, cannot find and investigates and prosecutes in first time, often held in electricity stealing It is just found after having continued a period of time, as technology develops, many electricity stealings are high in technological content, and behavior is very hidden, mostly Situation cannot find that effect of opposing electricity-stealing is not fairly obvious in time.Although punishment is very big, still there are fish that has escape the net, crime point There are idea of leaving things to chance, electricity stealings to happen occasionally for son.
Wrong wiring of electric energy meter can cause measuring error, more notes or few quantity calculation, carry out remedying electricity afterwards and often cause User is discontented, it is believed that the responsibility of problem goes out in one side of electric company, and electric company is easy to unnecessary trouble oneself is added Resentment is generated, generally will not actively be coordinated, and then generates unnecessary economic dispute, good service is caused to be complained, to confession The economic benefit and social image of electric enterprise cause immeasurable loss.In terms of practical experience, using traditional means, electric energy meter False wiring is often after electric energy meter charges actual motion for a period of time, and after forming certain wrong electricity, being likely to can quilt It was found that coming out.
Invention content
The present invention cannot have found and quickly position that false wiring of electric energy meter cannot in time after solving existing electricity stealing generation The problem of quickly finding at the first time provides a kind of method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter, pole It is big to improve working efficiency.
The present invention adopts the following technical scheme that realization:
A kind of fast automatic method screened with positioning stealing or wrong wiring of electric energy meter, includes the following steps:
(1), acquisition main website be not carried out with target area intra domain user or other known normal meterings stealing user power consumption parameters As the big data source of normal value acquisition, the different electrical equipment types used according to user generate this corresponding kind respectively Electrical equipment type has the electrical equipment benchmark model of normal electricity consumption feature;
Acquisition main website using target area intra domain user or it is known other have been carried out stealing user power consumption parameter as outlier The big data source of acquisition, the different electrical equipment types used according to user generate corresponding this kind of electrical equipment class respectively The characteristic feature model of type stealing or false wiring;
Wherein, power consumption parameter be active power, reactive power, power factor, load impedance, one in harmonic component or more It is a.
(2), acquisition main website local user's electric energy table sort into target area issue having for different type electrical equipment The electrical equipment benchmark model of normal electricity consumption feature and the characteristic feature model of stealing or false wiring, and store at the scene In electric energy meter function module.
(3), in target area local user's electric energy meter using acquisition module continuously in real time measure electric energy meter metering use One or more the variation in active power, reactive power, power factor, load impedance, harmonic component in electrical parameter Amount;Band timestamp storage is carried out when changing numerical quantity and being more than threshold value.
(4), in local user's electric energy meter, variable quantity is continuously just common with having for different type electrical equipment in real time The electrical equipment benchmark model of electrical feature and the characteristic feature model of stealing or false wiring are compared;
If the power consumption parameter variable quantity that local user's electric energy meter uses is located at the special with normal electricity consumption of different type electrical equipment In the range of the electrical equipment benchmark model of sign, and outside the characteristic feature model of false wiring, then judge the user power utilization Normally;
If the power consumption parameter variable quantity that local user's electric energy meter uses is located at the special with normal electricity consumption of different type electrical equipment Outside the range of the electrical equipment benchmark model of sign, or in the characteristic feature model of false wiring, then judge that the user doubts It is improper like electricity consumption;Then collected power consumption parameter variable quantity is uploaded main website by the electric energy meter, is further analyzed for main website, and rich The characteristic feature library data model of rich stealing or false wiring.
The method of the present invention principle is as follows:Under normal operation, all electrical equipments of each user will not be same Moment opens and is simultaneously closed off same simultaneously(Have a power failure, except shut-down).Each electrical equipment puts into operation, will necessarily be In the total electricity consumption trend of the user, total active power, reactive power, power factor, load impedance, harmonic component etc. are shown as There is the variation of step evolution in power consumption parameter monomer or its operation combination.The variable quantity is caused by the equipment of just live line work. When the variable quantity of active power, reactive power, load impedance, harmonic component etc. is substantially equal to single such equipment isolated operation Magnitude.
The active power and reactive power numerical value and its relative ratio consumed when the operation of each electrical equipment(Power because Number)And load impedance and the harmonic component of generation all follow certain rule, numerical value is all in certain reasonable interval range Interior, such as performance is close to some percentage of rated power, and minimum operation power is more than some threshold value(It can be according to reality to threshold value Border situation is set).The power factor of inductive load impedance has significant difference etc. with the power factor of capacitive load impedance.Electricity When energy table correctly measures, the electric parameter measured defers to above-mentioned rule.Generally than more covert, electricity filching person will not be complete for electricity stealing Turn-off current circuit can also make electric energy meter ins and outs continue to change.When electricity stealing occurs, although electricity stealing is generally compared More covert, electricity filching person will not be fully disconnected current loop, also electric energy meter ins and outs can be made to continue to change.Before no longer following All or part of rule is stated, off-note, such as main parameters are presented:Proportional decline such as active power, reactive power etc..Example Such as, the electric light of a 15W, when it is lighted, active power value added that the electric energy meter that normally measures measurespFor 15W.If hair Raw electricity stealing, then the active power changing value that electric energy meter measurespIt will often be less than or be much smaller than 15W.When stealing occurs, All electric appliances of the user can all show as the features such as active power is relatively low.In addition, will appear same feature when wrong line.
So features described above is exactly utilized in the method for the present invention, installed at the scene in the case of acquisition or the normal metering of acquisition Electric energy meter metering the power consumption parameters such as active power, reactive power, power factor, load impedance, harmonic component in it is a kind of or A variety of variable quantities, and store in the function module of the electric energy meter to installation at the scene;The electric energy meter of installation at the scene can connect Continue real-time the measuring locally active power, reactive power, power factor of a certain user, load impedance or harmonic component Variable quantity;Band timestamp storage is carried out when a certain variation numerical quantity is more than threshold value;In the electric energy meter of installation at the scene, will To the variable quantity with timestamp storage and the respective change amount that is in advance stored in(Electrical equipment benchmark model)It is compared, works as comparison When value afterwards is higher or lower than model scope, you can the electric energy meter of preliminary doubtful identification installation at the scene is by stealing electric energy meter Or error connection electric energy meter;This is identified as sending out prompt or alarm signal to main website by stealing electric energy meter or error connection electric energy meter; The variable quantity parameter with timestamp storage of generation is uploaded into main website simultaneously, is further analyzed for main website, abundant stealing or mistake connect The characteristic feature library data model of line.In this way, power supply personnel can in time, quickly know the letter that specifically which electric energy meter is sent out Breath, manually investigates doubtful user, further determines whether to cause with electricity stealing or circuit misconnection, makes in time Only.
The method of the present invention reasonable design, novel, unique, clear principle judge quick and precisely, can specifically navigate to a certain use The a certain piece of electric energy meter at family, opposes electricity-stealing and finds false wiring ultrahigh in efficiency, has good application value.
Specific implementation mode
Specific embodiments of the present invention are described in detail below.
A kind of fast automatic method screened with positioning stealing or wrong wiring of electric energy meter, includes the following steps:
(1), acquisition main website be not carried out with target area intra domain user or other known normal meterings stealing user power consumption parameters As the big data source of normal value acquisition, the different electrical equipment types used according to user generate this corresponding kind respectively Electrical equipment type has the electrical equipment benchmark model of normal electricity consumption feature.For example, to the different electrical equipments of household(Electricity Device)Classify, 100W or less electric appliances is set to minimal-power consumers, 500W-1000W electric appliances are set to middle power electricity consumption and set It is standby, it is set to high power electrical equipment higher than 1000 W electric appliances, the electrical equipment benchmark model of three types can be produced in this way( There can be other different types of classification), the variable quantity range of the benchmark model i.e. power consumption parameter, that is to say, that when When a certain user connects a high power power load, active power variable quantity can be in a rational model in power consumption parameter In enclosing.
Acquisition main website using target area intra domain user or it is known other have been carried out stealing user history power consumption parameter as Outlier acquisition big data source, the different electrical equipment types used according to user, generate respectively this corresponding kind with The characteristic feature model of the stealing of electric equipment type or false wiring.
Wherein, power consumption parameter be active power, reactive power, power factor, load impedance, one in harmonic component or Person is multiple.Generally for domestic consumer, active power and/or reactive power in power consumption parameter are acquired;Corresponding factory etc. Commercial user can acquire in active power in power consumption parameter, reactive power, power factor, load impedance, harmonic component One or more.
(2), acquisition main website local user's electric energy table sort into target area issue having for different type electrical equipment The electrical equipment benchmark model of normal electricity consumption feature and the characteristic feature model of stealing or false wiring, and store at the scene In electric energy meter function module.
(3), in target area, local user's electric energy meter using acquisition module continuously in real time measure electric energy meter metering use One or more the variation in active power, reactive power, power factor, load impedance, harmonic component in electrical parameter Amount;Band timestamp storage is carried out when changing numerical quantity and being more than threshold value;The setting electric power personnel of threshold value set according to actual conditions It is fixed, as long as being able to detect that the Significant Change amount of power consumption parameter, invalid fluctuation is filtered off, for example, can be set as electricity consumption The average value of equipment benchmark model range or 1/2 average value.
(4), in local user's electric energy meter, variable quantity is continuously just common with having for different type electrical equipment in real time The electrical equipment benchmark model of electrical feature and the characteristic feature model of stealing or false wiring are compared.
If it is just common that the power consumption parameter variable quantity that local user's electric energy meter uses is located at having for different type electrical equipment In the range of the electrical equipment benchmark model of electrical feature, and outside the characteristic feature model of false wiring, then judge the user Electricity consumption is normal.
If it is just common that the power consumption parameter variable quantity that local user's electric energy meter uses is located at having for different type electrical equipment Outside the range of the electrical equipment benchmark model of electrical feature, or in the characteristic feature model of false wiring, then judge the use The doubtful electricity consumption in family is improper;Then collected power consumption parameter variable quantity is uploaded main website by the electric energy meter, is further analyzed for main website, And the characteristic feature library data model of abundant stealing or false wiring.
It should be pointed out that for the those skilled in the art of the art, without departing from the principle of the present invention, Several improvement and application can also be made, these are improved and application is also considered as protection scope of the present invention.

Claims (1)

1. a kind of fast automatic examination and positioning stealing or the method for wrong wiring of electric energy meter, it is characterised in that:Include the following steps:
(1), acquisition main website be not carried out with target area intra domain user or other known normal meterings stealing user power consumption parameters As the big data source of normal value acquisition, the different electrical equipment types used according to user generate this corresponding kind respectively Electrical equipment type has the electrical equipment benchmark model of normal electricity consumption feature;
Acquisition main website using target area intra domain user or it is known other have been carried out stealing user power consumption parameter as outlier The big data source of acquisition, the different electrical equipment types used according to user generate corresponding this kind of electrical equipment class respectively The characteristic feature model of type stealing or false wiring;
Wherein, power consumption parameter be active power, reactive power, power factor, load impedance, one in harmonic component or more It is a;
(2), that acquisition main website local user's electric energy table sort into target area issues having for different type electrical equipment is normal With the electrical equipment benchmark model of electrical feature and the characteristic feature model of stealing or false wiring, and it is stored in field electric energy In table function module;
(3), in target area local user's electric energy meter using acquisition module continuously in real time measure electric energy meter metering electricity consumption join One or more the variable quantity in active power, reactive power, power factor, load impedance, harmonic component in number;When Change when numerical quantity is more than threshold value and carries out band timestamp storage;
(4), in local user's electric energy meter, continuously have the normal electricity consumption special with different type electrical equipment in real time variable quantity The electrical equipment benchmark model of sign and the characteristic feature model of stealing or false wiring are compared;
If the power consumption parameter variable quantity that local user's electric energy meter uses is located at the special with normal electricity consumption of different type electrical equipment In the range of the electrical equipment benchmark model of sign, and outside the characteristic feature model of false wiring, then judge the user power utilization Normally;
If the power consumption parameter variable quantity that local user's electric energy meter uses is located at the special with normal electricity consumption of different type electrical equipment Outside the range of the electrical equipment benchmark model of sign, or in the characteristic feature model of false wiring, then judge that the user doubts It is improper like electricity consumption;Then collected power consumption parameter variable quantity is uploaded main website by the electric energy meter.
CN201810088495.6A 2018-01-30 2018-01-30 The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter Expired - Fee Related CN108303576B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810088495.6A CN108303576B (en) 2018-01-30 2018-01-30 The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810088495.6A CN108303576B (en) 2018-01-30 2018-01-30 The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter

Publications (2)

Publication Number Publication Date
CN108303576A true CN108303576A (en) 2018-07-20
CN108303576B CN108303576B (en) 2019-11-29

Family

ID=62867227

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810088495.6A Expired - Fee Related CN108303576B (en) 2018-01-30 2018-01-30 The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter

Country Status (1)

Country Link
CN (1) CN108303576B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109782111A (en) * 2019-03-06 2019-05-21 国网湖北省电力有限公司黄石供电公司 A kind of electric energy metered system false wiring analysis method of three-phase three-wire system
CN110082577A (en) * 2019-04-18 2019-08-02 中国电力科学研究院有限公司 It is a kind of for judging the diagnostic method and system of electricity-saving appliance electricity stealing
CN112884002A (en) * 2021-01-18 2021-06-01 四川大学 Intelligent electric meter version classification method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113567719A (en) * 2021-06-21 2021-10-29 齐宜泽 Electricity stealing behavior judgment method and system based on current harmonic waves and waveforms

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0432386A1 (en) * 1989-12-14 1991-06-19 Landis & Gyr Business Support AG Arrangement to determine the values of electrical variables, that can be derived from at least two electrical input signals of the arrangement
CN102509162A (en) * 2011-11-18 2012-06-20 深圳市科陆电子科技股份有限公司 Intelligent resident electricity utilization management method and management system
CN103995161A (en) * 2014-06-03 2014-08-20 深圳市康拓普信息技术有限公司 Method and system for discriminating electricity stealing and leaking users
CN104036357A (en) * 2014-06-12 2014-09-10 国家电网公司 Analysis method for electricity stealing behavioral mode of electricity utilization of user
CN104280714A (en) * 2014-10-17 2015-01-14 国家电网公司 Running abnormality detecting method of metering device
CN104407268A (en) * 2014-11-27 2015-03-11 国家电网公司 Abnormal electricity utilization judgment method based on abnormal analysis of electric quantity, voltage and current
CN105092917A (en) * 2015-07-20 2015-11-25 河南行知专利服务有限公司 Electricity theft prevention system
CN106156269A (en) * 2016-06-01 2016-11-23 国网河北省电力公司电力科学研究院 One is opposed electricity-stealing precise positioning on-line monitoring method
CN106203832A (en) * 2016-07-12 2016-12-07 亿米特(上海)信息科技有限公司 Intelligent electricity anti-theft analyzes system and the method for analysis
CN106680557A (en) * 2017-01-05 2017-05-17 云南电网有限责任公司电力科学研究院 Electricity theft prevention method based on user behavior analysis

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0432386A1 (en) * 1989-12-14 1991-06-19 Landis & Gyr Business Support AG Arrangement to determine the values of electrical variables, that can be derived from at least two electrical input signals of the arrangement
CN102509162A (en) * 2011-11-18 2012-06-20 深圳市科陆电子科技股份有限公司 Intelligent resident electricity utilization management method and management system
CN103995161A (en) * 2014-06-03 2014-08-20 深圳市康拓普信息技术有限公司 Method and system for discriminating electricity stealing and leaking users
CN104036357A (en) * 2014-06-12 2014-09-10 国家电网公司 Analysis method for electricity stealing behavioral mode of electricity utilization of user
CN104280714A (en) * 2014-10-17 2015-01-14 国家电网公司 Running abnormality detecting method of metering device
CN104407268A (en) * 2014-11-27 2015-03-11 国家电网公司 Abnormal electricity utilization judgment method based on abnormal analysis of electric quantity, voltage and current
CN105092917A (en) * 2015-07-20 2015-11-25 河南行知专利服务有限公司 Electricity theft prevention system
CN106156269A (en) * 2016-06-01 2016-11-23 国网河北省电力公司电力科学研究院 One is opposed electricity-stealing precise positioning on-line monitoring method
CN106203832A (en) * 2016-07-12 2016-12-07 亿米特(上海)信息科技有限公司 Intelligent electricity anti-theft analyzes system and the method for analysis
CN106680557A (en) * 2017-01-05 2017-05-17 云南电网有限责任公司电力科学研究院 Electricity theft prevention method based on user behavior analysis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109782111A (en) * 2019-03-06 2019-05-21 国网湖北省电力有限公司黄石供电公司 A kind of electric energy metered system false wiring analysis method of three-phase three-wire system
CN110082577A (en) * 2019-04-18 2019-08-02 中国电力科学研究院有限公司 It is a kind of for judging the diagnostic method and system of electricity-saving appliance electricity stealing
CN112884002A (en) * 2021-01-18 2021-06-01 四川大学 Intelligent electric meter version classification method
CN112884002B (en) * 2021-01-18 2022-07-01 四川大学 Intelligent electric meter version classification method

Also Published As

Publication number Publication date
CN108303576B (en) 2019-11-29

Similar Documents

Publication Publication Date Title
CN108303576B (en) The method of fast automatic examination and positioning stealing and wrong wiring of electric energy meter
CN107025365B (en) A kind of non-intruding load discrimination method for user side
CN104280714B (en) A kind of measuring apparatus operation exception detection method
CN107863824A (en) Distribute-electricity transformer district intelligence managing and control system based on the optimization of load Intelligent cluster
CN110456207A (en) A kind of intelligent low-pressure method for diagnosing faults of open air
CN104407268A (en) Abnormal electricity utilization judgment method based on abnormal analysis of electric quantity, voltage and current
CN109298379A (en) A kind of recognition methods of the intelligent electric meter site error exception based on data monitoring
CN109752613B (en) Non-invasive load monitoring-based default electricity detection system and method
WO2008118306A1 (en) Automated system approach to analyzing harmonic distortion in an electric power system
CN105548949A (en) Method and system for fault remote determination of intelligent ammeter
CN108599365A (en) A kind of intelligent power distribution net
WO2018229714A1 (en) System and method for detecting theft of electricity
CN203367963U (en) Intelligent endpoint power supply controller
CN102347616A (en) Reactive compensation method with resonance detection and harmonic wave overcurrent protection and device thereof
CN204679557U (en) Judge that AC signal seals in the detection system of straight-flow system
CN104269040A (en) Power utilization information acquisition and orderly power utilization management system
CN101446619A (en) Alarm for detecting faults of overhead lines of distribution network
CN202189134U (en) Power failure monitoring device
CN107300662A (en) Electric arc alarm without externally fed
CN203368143U (en) Low-voltage distribution integrated monitoring device
CN204129463U (en) Hospital's electric intelligentization monitoring energy-saving management system
CN204287858U (en) A kind of intelligent agriculture row table
CN106771440A (en) A kind of single-phase liquid crystal ammeter and its control method for preventing power stealing
CN208723621U (en) A kind of universal monitoring system of base station switch power supply
CN104460459A (en) Intelligent agricultural drainage meter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Applicant after: State Grid Corporation of China

Applicant after: Measurement centre of Guo Wang Shanxi Province Utilities Electric Co.

Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Applicant before: State Grid Corporation of China

Applicant before: Measurement centre of Guo Wang Shanxi Province Utilities Electric Co.

GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191129

Termination date: 20210130