CN101635077A - Anti-theft detection method for road lamp cable - Google Patents

Anti-theft detection method for road lamp cable Download PDF

Info

Publication number
CN101635077A
CN101635077A CN200910044015A CN200910044015A CN101635077A CN 101635077 A CN101635077 A CN 101635077A CN 200910044015 A CN200910044015 A CN 200910044015A CN 200910044015 A CN200910044015 A CN 200910044015A CN 101635077 A CN101635077 A CN 101635077A
Authority
CN
China
Prior art keywords
cable
street lamp
street
stolen
branch
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
CN200910044015A
Other languages
Chinese (zh)
Other versions
CN101635077B (en
Inventor
曾祥君
金光明
邓丰
廖振
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.)
Changsha University of Science and Technology
Original Assignee
Changsha University of Science and Technology
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 Changsha University of Science and Technology filed Critical Changsha University of Science and Technology
Priority to CN2009100440157A priority Critical patent/CN101635077B/en
Publication of CN101635077A publication Critical patent/CN101635077A/en
Application granted granted Critical
Publication of CN101635077B publication Critical patent/CN101635077B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

本发明公开了一种路灯电缆防盗检测方法,包括以下步骤:将一个变频电流源串联一个电抗器、一个固定电阻和一个旋转开关接入路灯变压器中性点和三相低压母线之间;改变电流源注入信号频率,测量电流源输出的电流和电压,寻找单相路灯电路的谐振频率,测量出被测路灯线路所连路灯的等效总电容和路灯数量;如果测量的路灯数量不等于实际的路灯数量,则判断线路电缆被盗,并进行路灯电缆被盗点定位,发报警信号。本发明方法不需在电缆末端增加设备,不受变压器型号和线路长度影响,能准确确定被盗点位置,具有安全、快捷和适用面广的优点,彻底解决了路灯系统关灯期间线路电缆被盗断线报警的难题。

Figure 200910044015

The invention discloses a street lamp cable anti-theft detection method. Source injection signal frequency, measure the current and voltage output by the current source, find the resonant frequency of the single-phase street lamp circuit, measure the equivalent total capacitance of the street lamp connected to the tested street lamp line and the number of street lamps; if the number of street lamps measured is not equal to the actual If the number of street lamps is large, it is judged that the line cable is stolen, and the stolen point of the street lamp cable is located, and an alarm signal is sent. The method of the invention does not need to add equipment at the end of the cable, and is not affected by the type of transformer and the length of the line. The problem of theft and disconnection alarm.

Figure 200910044015

Description

Anti-theft detection method for road lamp cable
Technical field
The present invention relates to a kind of anti-theft detection method for road lamp cable, the anti-theft detection method for road lamp cable during particularly a kind of road lamp system is turned off the light.
Background technology
Present domestic transitional street lamps cable theft-prevention method mainly contains three kinds: the current method that leaks hunting, electric current and voltage detection method and power carrier method.
Document [Cao Bin, simple analysis cable anti-theft alarm The Application of Technology, industrial control computer, 2009,22 (5)] propose the current method that leaks hunting, between cable end piece and the earth, made an artificial electric leakage, in switch box, detected this leakage current, in case the stolen cut-out of cable then leakage current significantly reduce, judge whether stolen cut-out of cable by leakage current; But be subjected to the influence of leakage current of cable own, this method rate of false alarm height, and can not carry out stolen point and accurately locate.Document [square wave, power cable guard against theft and alarm system, electrotechnics, 2007,30 (1)] has proposed the electric current and voltage detection method, detects the cable current during turning on light, if electric current reduces suddenly, thinks that then cable is stolen; This method is influenced by voltage fluctuation, and antitheft accuracy of detection is poor.More than the road lighting cable antitheft detection of two kinds of methods during can only being used to turn on light, and road lighting cable stolen usually occur in turn off the light during.[opening can for document for this reason, based on the antitheft scheme of power line carrier low-voltage cable, Electronic Testing, 2009,45 (6)] proposed the power carrier method,, the power carrier receiving trap has been installed at cable end piece in cable head emission power carrier signal, if the power carrier device does not receive power carrier signal, then think the stolen cut-out of cable; This method need be installed the carrier wave receiving trap at line end, the cost height, and be subjected to the influence of street lamp electric capacity and electric cable capacitance, the carrier signal decay is big, is difficult to use in the antitheft detection of long cable.
For this reason, domestic urgent need invention high precision, the anti-theft detection method for road lamp cable of high reliability is with the antitheft high precision of road lighting cable during satisfying street lamp and turning off the light, the detection requirement of high reliability.
Summary of the invention
The invention provides a kind of high precision, the anti-theft detection method for road lamp cable of high reliability is applicable to the antitheft detection of road lighting cable during street lamp is turned off the light.
The technical scheme that the present invention solves the problems of the technologies described above may further comprise the steps:
(1) reactor that is L with inductance of a frequency conversion current source series connection, a fixed resistance and a rotary switch insert between street-lighting transformer neutral point and the three-phase low-voltage bus bar, and wherein rotary switch three moving contact a, b, c connect the three-phase low-voltage bus bar of transformer; When measuring beginning, the moving contact of rotary switch is rotated to a moving contact;
(2) the frequency conversion current source is through the frequency conversion current signal of reactor to a constant magnitude of phase bus injection, and the electric current and the voltage phase difference of measuring current source output change and inject signal frequency, find out resonance angular frequency ω 0Utilize following formula to calculate the measured value of the street lamp quantity of tested public lighting circuit connection:
C in the formula 0Be the capacitance of single street lamp,
Figure G2009100440157D00022
It is right to represent The round number;
(3) if street lamp takeoff value n SurveyEqual the actual value of test line street lamp quantity, show that the line cord that this tested phase connects is complete, do not have stolenly, the moving contact of rotary switch along a → b → c → a order, is rotated to next moving contact, return step (2);
(4) if described step (2) street lamp takeoff value n SurveyThe actual value that is not equal to test line street lamp quantity, show that this tested phase institute connection line cable is stolen, operate the street lamp branch switch that this phase bus links to each other, measure the street lamp quantity of every branch road successively one by one, have and only have tested street lamp branch road to connect with tested bus mutually during measurement, (2) measure the street lamp quantity of branch road set by step; If the measured value of branch road street lamp quantity is not equal to the actual value of this branch road street lamp quantity, show that this tested branch cable is stolen, stolen point is positioned at the n that stolen branch road is counted from the head end to the end SurveySmall cup and n SurveyBetween+1 street lamp.
2, anti-theft detection method for road lamp cable according to claim 1 is characterized in that: the span of reactor inductance is 5mH~150mH in the described step 1).
Technique effect of the present invention is: need not increase equipment at line end, not influenced by transformer model and line length, have safety, quick and widely applicable advantage has thoroughly solved the difficult problem of cable anti-theft alarm during street lamp is turned off the light.Can accurately determine stolen cable branch road, locate stolen some particular location, error is less than the spacing (being generally 20 meters~50 meters) of two street lamps.
Below in conjunction with accompanying drawing the present invention is made and to further specify.
Description of drawings
Fig. 1 is that cable theft-prevention of the present invention detects wiring diagram.
Fig. 2 is the equivalent circuit diagram that cable theft-prevention of the present invention detects.
Fig. 3 is the process flow diagram that cable theft-prevention of the present invention detects.
Embodiment
Referring to Fig. 1, Fig. 1 implements wiring diagram of the present invention for utilizing cable theft-prevention measuring instrument 3.There is the voltage measurement unit 4 of a frequency conversion current source 5 and a frequency conversion current output signal cable theft-prevention measuring instrument 3 inside.Between inductance of frequency conversion current source 5 series connection be size for the reactor 7 of L, a fixed resistance 6 and rotary switch 2 access street-lighting transformers 1 neutral point and three-phase low-voltage bus bar, wherein three of rotary switch moving contact a, b, c connect the three-phase low-voltage bus bar M of street-lighting transformer respectively A, M B, M CDuring street lamp is turned on light, three-phase breaker K A, K B, K CClosure, the moving contact of rotary switch 2 connect vacant node O, and cable theft-prevention measuring instrument 3 does not carry out the antitheft detection of road lighting cable; During street lamp is turned off the light, three-phase breaker K A, K B, K CDisconnect, the moving contact of rotary switch 2 connects moving contact a, b, c successively, and cable theft-prevention measuring instrument 3 carries out antitheft patrolling and examining to A, B, C uniline respectively.
The equivalent circuit diagram that cable theft-prevention of the present invention detects as shown in Figure 2.According to the inner structure of outer startup high-pressure mercury lamp, when the high-pressure mercury lamp both end voltage is lower than 50V, the street lamp open circuit, the equivalent capacity of single street lamp is C 0, as measuring the n small cup street lamp of parallel running in the loop, then equivalent capacity is:
C=nC 0
During measurement, the frequency conversion current signal of constant magnitude is injected in frequency conversion current signal source 5 to circuit-under-test
Figure G2009100440157D00041
Measure the return voltage signal by voltage measurement unit 4
Figure G2009100440157D00042
The voltage signal that compares and measures
Figure G2009100440157D00043
With the injection current signal
Figure G2009100440157D00044
Phase angle difference
Figure G2009100440157D00045
Change the injection current signal frequency, when
Figure G2009100440157D00046
When value equalled zero, the current signal frequency was the resonance angular frequency ω of street lamp branch road 0Can get according to resonance principle:
ω 0 L = 1 ω 0 C
Get by above-mentioned two formulas:
n = 1 ω 0 2 L C 0
The round number obtains the measured value of street lamp quantity in the test line:
Figure G2009100440157D00049
In the formula It is right to represent
Figure G2009100440157D000411
The round number.
Compare and measure value n SurveyWith the street lamp quantity actual value n that installs in this measurement loop Real,, illustrate that cable is complete in this measurement loop if both are equal; If both are unequal, then explanation is measured in the loop and the stolen situation of cable occurred.Only comprise the wall scroll branch cable if measure the loop, then stolen point is positioned at the n that stolen branch road is counted from the head end to the end SurveySmall cup and n SurveyBetween+1 street lamp.
Measurement process flow diagram of the present invention as shown in Figure 3.Carry out cable theft-prevention during street lamp is turned off the light and patrol and examine,, measure the resonance angular frequency ω of A circuitry phase the moving contact of rotary switch 2 connected node a at first 0, the street lamp takeoff value n of calculating A circuitry phase Survey, and with the street lamp quantity actual value n of A circuitry phase RealRelatively.If both equate that illustrate that cable is complete in the A circuitry phase, rotary switch rotates in proper order by a → b → c → a successively, detects B circuitry phase, C circuitry phase successively, detects the A circuitry phase again, successively cycle detection.If the street lamp takeoff value n of detected circuitry phase SurveyActual value n with this detected circuitry phase street lamp quantity RealUnequal, illustrate that this detected phase cable is stolen, the stolen cut-out of cable appears in this circuitry phase, and next step carries out stolen branch cable and detects and stolen point location.
When stolen branch cable detects, at first disconnect all branch switchs that stolen phase bus links to each other.Closed then article one branch switch, the resonance frequency omega of measurement article one branch road 0, utilize above-mentioned formula to calculate the street lamp takeoff value n of tested branch road SurveyIf the street lamp quantity detected value n of tested branch road SurveyActual value n with tested branch road street lamp quantity RealEquate, illustrate that tested branch cable is complete, disconnect tested branch switch,, detect next branch road by closed next branch switch of branch cable number order, until all branch cable that stolen phase bus links to each other detected intact till.If the street lamp takeoff value n of tested branch road SurveyActual value n with this tested branch road street lamp quantity RealUnequal, illustrate that this branch road is the stolen branch road of cable, the stolen n that from the head end to the end, counts at tested branch road SurveySmall cup and n SurveyBetween+1 street lamp, write down the numbering and the position of failure point of tested branch cable; Disconnect tested branch switch,, detect next branch road by closed next branch switch of number order, until all branch cable that stolen phase bus links to each other detected intact till.Send stolen alerting signal at last, and show all stolen some positions.
In order to verify the feasibility of anti-theft detection method for road lamp cable described in the invention, by circuit design shown in Figure 1 the test macro of a stolen detection of road lighting cable, include 14 110W high-pressure mercury lamps, switch is installed in segmentation in cable, disconnect the stolen cut-out of dummycable with switch, respectively to stolen o'clock of detection line cable between the 3rd~the 4th street lamp, stolen o'clock between the 5th~the 6th street lamp, stolen o'clock between the 8th~the 9th street lamp, stolen o'clock between the 11st~the 12nd street lamp and do not have stolen five kinds of situations and detect.Testing result is as shown in table 1, wherein δ nExpression street lamp takeoff error.
Table 1
Figure G2009100440157D00061
As can be seen from Table 1: whether stolen detection is correct for road lighting cable, and stolen some position probing is accurate, street lamp takeoff error delta nBe 0.1 to the maximum, can satisfy the industry spot service requirement fully; Shown that this inventive method can accurately determine stolen some position, thoroughly solved the difficult problem of the stolen break alarm of line cord during road lamp system is turned off the light.

Claims (2)

1、一种路灯电缆防盗检测方法,其特征是,它包括如下步骤:1. A street light cable anti-theft detection method is characterized in that it comprises the steps: (1)将一个变频电流源串联一个电感为L的电抗器、一个固定电阻和一个旋转开关接入路灯变压器中性点和三相低压母线之间,其中旋转开关三个动触点a、b、c连接变压器的三相低压母线;测量开始时,将旋转开关的动触头旋转至a动触点;(1) Connect a variable frequency current source in series with a reactor with an inductance of L, a fixed resistor and a rotary switch between the neutral point of the street lamp transformer and the three-phase low-voltage bus, where the rotary switch has three moving contacts a, b , c is connected to the three-phase low-voltage busbar of the transformer; when the measurement starts, turn the moving contact of the rotary switch to a moving contact; (2)变频电流源经电抗器向一相母线注入一个大小恒定的变频电流信号,测量电流源输出的电流和电压相位差,改变注入信号频率,找出谐振角频率ω0;利用下述公式计算出被测路灯线路连接的路灯数量的测量值:(2) The variable frequency current source injects a constant variable frequency current signal into a phase bus through the reactor, measures the current and voltage phase difference output by the current source, changes the frequency of the injected signal, and finds out the resonant angular frequency ω0 ; use the following formula Calculate the measured value of the number of street lights connected to the street light line under test:
Figure A2009100440150002C1
Figure A2009100440150002C1
式中C0为单盏路灯的电容值,
Figure A2009100440150002C2
表示对
Figure A2009100440150002C3
四舍五入取整数;
In the formula, C 0 is the capacitance value of a single street lamp,
Figure A2009100440150002C2
express yes
Figure A2009100440150002C3
round to an integer;
(3)若路灯数量测量值n等于被测线路路灯数量的实际值,表明该被测相所连接的线路电缆完整,没有被盗,将旋转开关的动触头沿a→b→c→a顺序,旋转至下一动触点,返回步骤(2);(3) If the measured value n of the number of street lamps is equal to the actual value of the number of street lamps on the tested line, it indicates that the line cable connected to the measured phase is complete and has not been stolen. Move the moving contact of the rotary switch along a→b→c→ a sequence, rotate to the next moving contact, and return to step (2); (4)若所述步骤(2)路灯数量测量值n不等于被测线路路灯数量的实际值,表明该被测相所连接线路电缆被盗,操作该相母线相连的路灯支路开关,依次逐条测量每条支路的路灯数量,测量时有且仅有被测路灯支路与被测相母线连接,按步骤(2)测量支路的路灯数量;若支路路灯数量的测量值不等于该支路路灯数量的实际值,表明该被测支路电缆被盗,被盗点位于被盗支路从首端到末端计数的第n盏与第n+1盏路灯之间。(4) If the measured value n of the number of street lamps in the step (2) is not equal to the actual value of the measured line street lamp quantity, it indicates that the line cable connected to the measured phase is stolen, and the street lamp branch switch connected to the phase bus is operated. Measure the number of street lamps in each branch one by one in turn. During the measurement, only the measured street lamp branch is connected to the measured phase bus, and measure the number of street lamps in the branch according to step (2); if the measured value of the number of branch street lamps is not Equal to the actual value of the number of street lamps in the branch, it indicates that the cable of the branch under test is stolen, and the stolen point is between the nth measurement and the nth +1 streetlight counted from the beginning to the end of the stolen branch.
2、根据权利要求1所述的路灯电缆防盗检测方法,其特征在于:所述步骤1)中电抗器电感的取值范围为5mH~150mH。2. The anti-theft detection method for street lamp cables according to claim 1, characterized in that: in the step 1), the value range of the reactor inductance is 5mH-150mH.
CN2009100440157A 2009-07-31 2009-07-31 Anti-theft detection method for road lamp cable Expired - Fee Related CN101635077B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100440157A CN101635077B (en) 2009-07-31 2009-07-31 Anti-theft detection method for road lamp cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009100440157A CN101635077B (en) 2009-07-31 2009-07-31 Anti-theft detection method for road lamp cable

Publications (2)

Publication Number Publication Date
CN101635077A true CN101635077A (en) 2010-01-27
CN101635077B CN101635077B (en) 2012-05-09

Family

ID=41594257

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009100440157A Expired - Fee Related CN101635077B (en) 2009-07-31 2009-07-31 Anti-theft detection method for road lamp cable

Country Status (1)

Country Link
CN (1) CN101635077B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101950458A (en) * 2010-09-21 2011-01-19 长沙理工大学 Locating method of stolen points of power cable
CN103364653A (en) * 2012-04-10 2013-10-23 海洋王(东莞)照明科技有限公司 Test method for the maximum number of loads of multiple lamps connected in parallel
WO2014097006A1 (en) 2012-12-18 2014-06-26 Koninklijke Philips N.V. Problem detection in cable system
WO2015001448A1 (en) 2013-07-02 2015-01-08 Koninklijke Philips N.V. Device and method for investigating a cable system
WO2015001455A1 (en) 2013-07-02 2015-01-08 Koninklijke Philips N.V. Cable system problem detection via characteristic frequency
CN104854463A (en) * 2012-12-18 2015-08-19 皇家飞利浦有限公司 Problem detection in cable system
CN105308468A (en) * 2013-07-02 2016-02-03 皇家飞利浦有限公司 Device and method for investigating a cable system
CN107517533A (en) * 2017-08-11 2017-12-26 四川华体照明科技股份有限公司 A kind of self-adapting type street lamp loop ownership rapid detection system and method based on NB IoT

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101950458A (en) * 2010-09-21 2011-01-19 长沙理工大学 Locating method of stolen points of power cable
CN103364653A (en) * 2012-04-10 2013-10-23 海洋王(东莞)照明科技有限公司 Test method for the maximum number of loads of multiple lamps connected in parallel
CN103364653B (en) * 2012-04-10 2016-09-28 海洋王(东莞)照明科技有限公司 The method of testing of the maximum load quantity of multichannel light fixture parallel circuit
WO2014097006A1 (en) 2012-12-18 2014-06-26 Koninklijke Philips N.V. Problem detection in cable system
CN104854463A (en) * 2012-12-18 2015-08-19 皇家飞利浦有限公司 Problem detection in cable system
CN104854463B (en) * 2012-12-18 2019-12-20 飞利浦灯具控股公司 Problem detection in cable systems
WO2015001448A1 (en) 2013-07-02 2015-01-08 Koninklijke Philips N.V. Device and method for investigating a cable system
WO2015001455A1 (en) 2013-07-02 2015-01-08 Koninklijke Philips N.V. Cable system problem detection via characteristic frequency
CN105308468A (en) * 2013-07-02 2016-02-03 皇家飞利浦有限公司 Device and method for investigating a cable system
CN105308468B (en) * 2013-07-02 2018-02-23 飞利浦灯具控股公司 For surveying the apparatus and method of cable system
CN107517533A (en) * 2017-08-11 2017-12-26 四川华体照明科技股份有限公司 A kind of self-adapting type street lamp loop ownership rapid detection system and method based on NB IoT

Also Published As

Publication number Publication date
CN101635077B (en) 2012-05-09

Similar Documents

Publication Publication Date Title
CN101635077B (en) Anti-theft detection method for road lamp cable
CN202494775U (en) Calibrator for DC system insulation device
CN102636731B (en) Power distribution network single-phase disconnection judging and addressing method based on load measuring and recording system
CN109613425A (en) Converter valve test macro and test method
CN101975911B (en) Earth fault judging method for overhead line fault indicator
CN106950450B (en) Early warning method and equipment for secondary circuit failure of relay protection device
CN103777108B (en) A kind of method of quick lookup electrical equipment grounding trouble point
CN102565619A (en) State diagnosis method for small-current ground fault line selection device
CN102243286A (en) Apparatus for detecting and displaying grounding state of equipment or socket
CN108646125B (en) Method, device and system for testing capacitance current
CN103558506A (en) Method and device for searching for ground faults of non-injection type direct current system
CN101776723B (en) Method for detecting earth fault of direct current system by utilizing frequency deviation method
CN207650384U (en) The detection circuit and electric energy computation chip of bleeder circuit parameter
CN107957568A (en) Secondary Circuit of Potential Transformer multipoint earthing Quick positioning instrument and lookup method
CN112904126A (en) Detection method using arc suppression system detection device
CN205139349U (en) Arrester discharge counter and leakage current table check gauge
CN101950458A (en) Locating method of stolen points of power cable
CN205210220U (en) Measure device of direct current circuit to ground leakage current
CN202057749U (en) Instrument for detecting and displaying ground state of equipment or socket
CN202033449U (en) Small current grounding failure online locating device
CN103558579A (en) Electric energy meter calibration device
CN201993464U (en) Intelligent detector for electric energy meter
CN105093011B (en) A kind of electric vehicle alternating current-direct current charging pile calibrating conversion equipment
CN205691705U (en) A kind of ground fault detection device based on capacitance partial pressure
CN204882697U (en) High -voltage live -line detection device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120509

Termination date: 20140731

EXPY Termination of patent right or utility model