CN204228888U - New distribution line fault position testers - Google Patents

New distribution line fault position testers Download PDF

Info

Publication number
CN204228888U
CN204228888U CN201420696686.8U CN201420696686U CN204228888U CN 204228888 U CN204228888 U CN 204228888U CN 201420696686 U CN201420696686 U CN 201420696686U CN 204228888 U CN204228888 U CN 204228888U
Authority
CN
China
Prior art keywords
signal
testers
new distribution
distribution line
current
Prior art date
Application number
CN201420696686.8U
Other languages
Chinese (zh)
Inventor
崔永谦
陈文民
孙雪君
杨秀晶
赵栋
丁文涛
刘德秀
杜延俊
邱莉
吴巍
Original Assignee
中国石油化工股份有限公司
中国石化集团胜利石油管理局电力管理总公司
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 中国石油化工股份有限公司, 中国石化集团胜利石油管理局电力管理总公司 filed Critical 中国石油化工股份有限公司
Priority to CN201420696686.8U priority Critical patent/CN204228888U/en
Application granted granted Critical
Publication of CN204228888U publication Critical patent/CN204228888U/en

Links

Classifications

    • Y04S10/522

Abstract

The utility model provides a kind of new distribution line fault position testers, this new distribution line fault position testers comprises transmitter, sensor, DC receiver, clamp on amperemeter and clamp on amperemeter receiver, this transmitter is connected to faulty line and sends signal to faulty line, this sensor hangs over detection signal on faulty line, and this DC receiver wirelessly gone up earthward transmits the signal detected, this DC receiver receives the signal display waveform that this sensor detects, this clamp on amperemeter detects electric current on faulty line, and the current digital signal that this clamp on amperemeter receiver wireless transmission gone up earthward detects.This new distribution line fault position testers can be more fast Search and Orientation trouble spot, reduce power off time, Accident prevention expanded range, has huge actual application value, can increase work efficiency simultaneously, reduces working strength.

Description

New distribution line fault position testers

Technical field

The utility model relates to line maintenance device, particularly relates to a kind of new distribution line fault position testers.

Background technology

The accurate Search and Orientation of distribution line failure point is a puzzlement work about electric power person's difficult problem always, because distribution line branch is many, cable is many, and controller switching equipment is many, and tour difficulty is large.For a lot of disguised accident point, correct judgement cannot be done in time without apparatus measures only according to naked eyes, often will adopt and discharge, continuous segmentation, send by the examination of platform transformer or circuit turns maintenance and completely steps on bar and search, and time-consumingly requires great effort again, add labour intensity, inefficiency.

At present, having under electricity condition, utilize small current neutral grounding system to search the circuit that earth fault occurs very ripe, fault inquiry quick and precisely, play huge effect at work, but also there is incomplete place, when 6 ~ 10kV circuit single-phase earthing, due to size, the phase invariant of line voltage, according to regulations stipulate, generally can continue to run, but not exceed 2h, because other healthy phases voltage-to-grounds will be raised to relatively doubly, may threaten to the insulation weak link of network system like this.Due to the loose contact of single-phase earthing point possibility, therefore can produce moment arc discharge by earth point, even produce resonance potential, whole the stable of 6 ~ 10kV network system is constituted a threat to.Therefore require to fix a breakdown as early as possible, guarantee power grid operation.Once after circuit draws road to have a power failure, the instrument of charged looking up the fault just can not be applied again, and fault inquiry is just very difficult.We have invented a kind of new new distribution line fault position testers for this reason, solve above technical matters.

Utility model content

The purpose of this utility model be to provide a kind of can under circuit electroless state the new distribution line fault position testers of earth point Search and Orientation.

The purpose of this utility model realizes by following technical measures: new distribution line fault position testers, this new distribution line fault position testers comprises transmitter, sensor, DC receiver, ac sensor and ac sensor receiver, this transmitter is connected to faulty line and sends signal to faulty line, this sensor hangs over detection signal on faulty line, and this DC receiver wirelessly gone up earthward transmits the signal detected, this DC receiver receives the signal display waveform that this sensor detects, this ac sensor detects electric current on faulty line, and the current digital signal that this ac sensor receiver wireless transmission gone up earthward detects.

The purpose of this utility model also realizes by following technical measures:

This transmitter sends AC signal or DC pulse signal to faulty line, this sensor is when this transmitter sends DC pulse signal, signal waveform on detection failure circuit, this ac sensor this transmitter send AC signal go out time, the current signal on detection failure circuit.

This sensor adopts high sensor, for opening designs.

This DC receiver designs for hand-held, and adopts big screen LCD, shows this sensor states, current waveform and current reference value.

This ac sensor receiver designs for hand-held, and adopts liquid crystal display, in real time the size of the tested electric current of display.

This transmitter comprises power supply, solid-state relay, mode conversion switch, control panel, zero position switch, isolating transformer, DC generator and transtat, this power supply is connected to this control panel, this control panel connects this solid-state relay, this mode conversion switch and this zero position switch pressure regulator, this mode conversion switch connects this transtat, and this transtat is connected to this isolating transformer and this DC generator.

This power supply provides AC power to this control panel, this solid-state relay carries out overcurrent protection, and provide DC pulse to export, this control on-board pattern switch carries out interchange and exports, the mutual conversion that DC pulse exports, this zero position switch starts when zero-bit, this transtat regulates the voltage levels exchanging output or DC pulse output, this isolating transformer is when this switch exports in interchange, export the AC signal after the adjustment of this transtat, this DC generator is when this switch exports in DC pulse, export the DC pulse signal after the adjustment of this transtat.

This transmitter also comprises A.C. voltmeter, D.C. voltmeter, common current table, this isolating transformer is connected to this A.C. voltmeter and is serially connected with this common current table with the voltage and current of display translation AC signal, and this DC generator is connected to this D.C. voltmeter and is serially connected with this common current table with the voltage and current of the DC pulse signal of display translation.

This transmitter also comprises the first resistance, second resistance and the 3rd resistance, the switch that this first resistor coupled in parallel is connected to this power supply prevents overvoltage, this second resistor coupled in parallel is connected to this transtat and prevents overvoltage, 3rd resistance is current-limiting resistance, and series connection is between this mode conversion switch and this transtat.

New distribution line fault position testers in the utility model, can under circuit electroless state the technology of earth point Search and Orientation, and the trouble spot of short circuit under power down mode, open circuit also can the technology of Search and Orientation, break through the limitation of current small current neutral grounding system, Search and Orientation trouble spot that can be more fast, reduce power off time, Accident prevention expanded range, has huge actual application value.Can increase work efficiency simultaneously, reduce working strength.The beneficial effects of the utility model are: 1. can the position of the accurate localization of faults.2. need not step on bar inspection by bar, increase work efficiency, reduce labour intensity.3., not by the impact of line distribution capacitance, effectively can solve the orientation problem in high resistance ground situation.4. high-voltage signal source adopts ac power supply, and signal DC receiver adopts hand held structures, utilizes rechargeable battery powered, and be convenient to field operation, dirigibility is high.5. high-voltage signal source can ensure to puncture earth fault, makes fault recurrence; Signal sensor strong interference immunity, utilizes " bisection method " online curb line test keypoint part, can find trouble spot fast.6. technology maturation, reliability are high, are applicable to 6 ~ 35kV power distribution network, are applicable to the various faults situations such as metallic earthing, arcing ground, transition resistance ground connection, phase fault.

Accompanying drawing explanation

Fig. 1 is the structural drawing of new distribution line fault position testers of the present utility model;

Fig. 2 is the sensor of new distribution line fault position testers of the present utility model and the schematic diagram of DC receiver;

Fig. 3 is the clamp on amperemeter of new distribution line fault position testers of the present utility model and the schematic diagram of clamp on amperemeter receiver

Fig. 4 is the structural drawing of the transmitter of new distribution line fault position testers of the present utility model;

Fig. 5 is the circuit diagram of the transmitter of new distribution line fault position testers of the present utility model;

Fig. 6 is the test panel schematic diagram of the transmitter of new distribution line fault position testers of the present utility model.

Embodiment

For making above and other object of the present utility model, feature and advantage can become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.

At present, having the Query Location of electricity condition line earth fault, small current neutral grounding system has been applied very ripe.Therefore, the present invention uses for reference small current neutral grounding system signal input technology, and under electroless state, the Search and Orientation of distribution line failure point uses corresponding signal injection technology.

Fig. 1 is the structural drawing of new distribution line fault position testers of the present utility model.New distribution line fault position testers of the present utility model includes transmitter 1, sensor 2, DC receiver 3, clamp on amperemeter 4 and clamp on amperemeter receiver 5.This transmitter 1 sends signal to faulty line, and sensor 2 hangs over detection signal waveform on faulty line, and the DC receiver 3 wirelessly gone up earthward transmits the signal detected, DC receiver 3 receives the signal display waveform that detect.Circuit generation metallic earthing or stake resistance less time, transmitter 1 is switched to interchange output state, clamp on amperemeter 4 is adopted to detect electric current on faulty line, and the current digital signal that clamp on amperemeter receiver 5 wireless transmission gone up earthward detects, clamp on amperemeter receiver 5 receives the current digital signal that detects and shows.

In application specific embodiments of the invention, after faulty line is stopped transport, first apply voltage by transmitter 1 to circuit and make fault recurrence.Electric current is sent by transmitter 1, flows through faulty line, clicks and enters ground and return transmitter 1 by the earth ground connection.

Transmitter 1 exports as industrial frequency AC output and pulsed DC signal export two kinds of patterns.

Industrial frequency AC exports and is mainly used to measure low resistance faults, and during circuit generation low resistance faults, can inject larger power current, wherein capacitance current component accounts for ratio is very little, and before and after trouble spot, the change of industrial frequency AC electric current obviously, easy looking up the fault.

Pulsed DC signal is mainly used to search high resistive fault, during circuit generation high resistive fault, the voltage high current injected to circuit is little, due to the existence of distributed capacitance, use the easier looking up the fault point of ultra-low frequency signal, the lower impact then by system distributed capacitance of frequency is less.The ability of pure direct current signal anti-distributed capacitance impact is the strongest theoretically, but uses pure direct current signal to be difficult to invariably magnetic influence, and through theory calculate and actual verification, 1Hz signal can meet most on-the-spot test demand.

Online curb line, is mounted sensor 2 by insulating bar and detects electric current on the line.Sensor 2 adopts high sensor, and opening designs, and its magnetic circuit, without the need to closed, facilitates extension, extract operation to a great extent.Electric current on sensor 2 detection line, carries out zeroing operation automatically, wirelessly outwards transmits after simulating signal being changed into digital signal.

The wireless signal that DC receiver 3 receiving sensor 2 on the ground sends, DC receiver 3 designs for hand-held, and adopts big screen LCD, shows sensor states, current waveform and current reference value, display measurement result directly perceived on liquid crystal display.Before trouble spot, continuing current flow exists, behind trouble spot, and current vanishes.First can carry out rough segmentation, then pinpoint, thus determine abort situation fast.As shown in Figure 2, Fig. 2 is the schematic diagram of sensor 2 and DC receiver 3.

When circuit generation metallic earthing or stake resistance less time, transmitter 1 is switched to interchange output state, transmitter output voltage is lower, and the electric current of injection is larger, and at this moment capacitance current accounts for ratio is less, survey electric current mainly resistive current, at this moment use power frequency clamp on amperemeter 4 to carry out localization of fault very convenient, namely from transmitter 1 to trouble spot, power current exists always, cross trouble spot after-current can sharply reduce, the place of curent change is exactly trouble spot.

Clamp on amperemeter receiver 5 on the ground receives the signal that clamp on amperemeter 4 sends, and clamp on amperemeter receiver 5 designs for hand-held, and adopts liquid crystal display, and LCD shows the size of tested electric current in real time.As shown in Figure 3, Fig. 3 is the schematic diagram of clamp on amperemeter 4 and clamp on amperemeter receiver 5.

As shown in Figure 4, Fig. 4 is the structural drawing of the transmitter of new distribution line fault position testers of the present utility model.This new distribution line fault position testers forms primarily of power supply 41, solid-state relay 42, mode conversion switch 43, control panel 44, zero position switch 45, isolating transformer 46, DC generator 47 and transtat 48.Power supply 41 is connected to control panel 44, and control panel 44 extracted current detects, start stopping and external power supply instruction protection act, and interface connects solid-state relay 42, mode conversion switch 43, zero position switch 45 simultaneously.Mode conversion switch 43 connects transtat 48, and transtat 48 is connected to isolating transformer 46 and DC generator 47.

As shown in Figure 5, Fig. 5 is the circuit diagram of the transmitter of new distribution line fault position testers of the present utility model.

In figure, solid-state relay 42 carries out overcurrent protection, DC pulse exports.

In figure, mode conversion switch 43 carries out interchange output, DC pulse output conversion mutually.

In figure, control panel 44 mainly carries out current detecting, startup hold function, power supply instruction.

In figure, zero position switch 45 could must start when zero-bit.

In figure, isolating transformer 46 is when switch is when exchanging output, has output AC signal.

In figure, DC generator 47 is when switch exports at direct current, has output direct current signal.

Transtat 48 regulation voltage high low action when exchanging output or direct current exports in figure.

Isolating transformer 46 is connected to A.C. voltmeter and is serially connected with common current table with the voltage and current of the direct current signal of display translation, and DC generator 47 is connected to D.C. voltmeter and is serially connected with common current table with the voltage and current of the AC signal of display translation simultaneously.

The switch that in figure, resistance VR1 is connected in power supply 41 prevents overvoltage, resistance VR2 is connected in transtat 48 and prevents overvoltage, and R1 is current-limiting resistance, is serially connected between mode conversion switch 43 and transtat 48.

Fig. 6 is the test panel schematic diagram figure of new distribution line fault position testers of the present utility model.Trouble spot low-resistance test connection method: protecting field jack 75 inserts the earth by connecting line, exchanges output plughole 64 and connects fault phase by connecting line, and test ground 66 inserts the earth by connecting line, and AC220V jack 74 is by the external 220V power supply of connecting line.

After new distribution line fault position testers and annex being connected, protective current table 61, interchange output 62, the display of High voltage output table 63 are 0, operating power switch 73, and power light 68 is bright, protection pilot lamp 69 is bright.Operation exports conjunction 70; rotate and export adjustment 67, observe protective current table 61 with exchanging and export table 62, when protective current table 61 is designated as 50 MAHs; stop the rotation and export adjustment 67; open DC receiver power switch, choose gear, the intermediate bar position first arriving power circuit uses dichotomy to check; the cardinal principle orientation of the localization of faults; then determine the branch residing for fault, investigate successively, until locate successfully.

When this connected mode does not detect corresponding signal, operation exports and divides 72, then carries out trouble spot high resistant test wiring.

Trouble spot high resistant test connection method: protecting field jack 75 inserts the earth by connecting line, and High voltage output jack 65 connects fault phase by connecting line, test ground 66 inserts the earth by connecting line, and AC220V jack 74 is by the external 220V power supply of connecting line.

After high resistant test connection completes, operation output switching 71, other method of operating is tested identical with low-resistance, repeats no more.

Claims (9)

1. new distribution line fault position testers, it is characterized in that, this new distribution line fault position testers comprises transmitter, sensor, DC receiver, clamp on amperemeter and clamp on amperemeter receiver, this transmitter is connected to faulty line and sends signal to faulty line, this sensor hangs over detection signal on faulty line, and this DC receiver wirelessly gone up earthward transmits the signal detected, this DC receiver receives the signal display waveform that this sensor detects, this clamp on amperemeter detects electric current on faulty line, and the current digital signal that this clamp on amperemeter receiver wireless transmission gone up earthward detects.
2. new distribution line fault position testers according to claim 1, it is characterized in that, this transmitter sends AC signal or DC pulse signal to faulty line, this sensor is when this transmitter sends DC pulse signal, signal waveform on detection failure circuit, this clamp on amperemeter this transmitter send AC signal go out time, the signal on detection failure circuit.
3. new distribution line fault position testers according to claim 1, is characterized in that, this sensor adopts high sensor, for opening designs.
4. new distribution line fault position testers according to claim 1, is characterized in that, this DC receiver designs for hand-held, and adopts big screen LCD, shows this sensor states, current waveform and current reference value.
5. new distribution line fault position testers according to claim 1, is characterized in that, this clamp on amperemeter receiver designs for hand-held, and adopts liquid crystal display, in real time the size of the tested electric current of display.
6. new distribution line fault position testers according to claim 1, it is characterized in that, this transmitter comprises power supply, solid-state relay, mode conversion switch, control panel, zero position switch, isolating transformer, DC generator and transtat, this power supply is connected to this control panel, this control panel connects this solid-state relay, this mode conversion switch and this zero position switch pressure regulator, this mode conversion switch connects this transtat, and this transtat is connected to this isolating transformer and this DC generator.
7. new distribution line fault position testers according to claim 6, it is characterized in that, this power supply provides AC power to this control panel, this solid-state relay carries out overcurrent protection, and provide DC pulse to export to this control panel, the transmission of this control panel exchanges output and DC pulse exports to this mode switch, this mode conversion switch carries out interchange and exports, the mutual conversion that DC pulse exports, this zero position switch starts when zero-bit, this transtat regulates the voltage levels exchanging output or DC pulse output, this isolating transformer is when this switch exports in interchange, export the AC signal after the adjustment of this transtat, this DC generator is when this switch exports in DC pulse, export the DC pulse signal after the adjustment of this transtat.
8. new distribution line fault position testers according to claim 6, it is characterized in that, this transmitter also comprises A.C. voltmeter, D.C. voltmeter, common current table, this isolating transformer is connected to this A.C. voltmeter and is serially connected with this common current table with the voltage and current of display translation AC signal, and this DC generator is connected to this D.C. voltmeter and is serially connected with this common current table with the voltage and current of the DC pulse signal of display translation.
9. new distribution line fault position testers according to claim 6, it is characterized in that, this transmitter also comprises the first resistance, second resistance and the 3rd resistance, the switch that this first resistor coupled in parallel is connected to this power supply prevents overvoltage, this second resistor coupled in parallel is connected to this transtat and prevents overvoltage, 3rd resistance is current-limiting resistance, and series connection is between this mode conversion switch and this transtat.
CN201420696686.8U 2014-11-19 2014-11-19 New distribution line fault position testers CN204228888U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420696686.8U CN204228888U (en) 2014-11-19 2014-11-19 New distribution line fault position testers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420696686.8U CN204228888U (en) 2014-11-19 2014-11-19 New distribution line fault position testers

Publications (1)

Publication Number Publication Date
CN204228888U true CN204228888U (en) 2015-03-25

Family

ID=52926968

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420696686.8U CN204228888U (en) 2014-11-19 2014-11-19 New distribution line fault position testers

Country Status (1)

Country Link
CN (1) CN204228888U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107782975A (en) * 2017-09-19 2018-03-09 山东建筑大学 Distributed grounding resistance detection system and detection method based on radio signal source
CN109031064A (en) * 2018-07-24 2018-12-18 常州同惠电子股份有限公司 High pressure two for wire test instrument divides test method
CN109507540A (en) * 2018-12-20 2019-03-22 孟小晶 High value ground short circuit fault point is pressed to search instrument and lookup method in one kind
CN110088462A (en) * 2016-12-22 2019-08-02 维斯塔斯风力系统集团公司 Electric fault detection in wind turbine generator control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110088462A (en) * 2016-12-22 2019-08-02 维斯塔斯风力系统集团公司 Electric fault detection in wind turbine generator control system
CN107782975A (en) * 2017-09-19 2018-03-09 山东建筑大学 Distributed grounding resistance detection system and detection method based on radio signal source
CN107782975B (en) * 2017-09-19 2019-11-12 山东建筑大学 Distributed grounding resistance detection system and detection method based on radio signal source
CN109031064A (en) * 2018-07-24 2018-12-18 常州同惠电子股份有限公司 High pressure two for wire test instrument divides test method
CN109507540A (en) * 2018-12-20 2019-03-22 孟小晶 High value ground short circuit fault point is pressed to search instrument and lookup method in one kind

Similar Documents

Publication Publication Date Title
US10222409B2 (en) Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network
CN1786726B (en) System and method of locating ground fault in electrical power distribution system
CN104218563B (en) The distribution network failure arc extinguishing method that a kind of neutral point is grounded through Multilevel Inverters
CN104101812B (en) Single-phase grounding fault detection and positioning method and system for low-current grounding power distribution network
CN102866326B (en) Based on the distribution network fault line selection of zero sequence current variable quantity waveform correlation coefficient matrix
CN102937675B (en) The method of work of Real-time Electrical Distribution Network Data collection and fault location system
CN101551432B (en) Power distribution network fault positioning method
CN102608445B (en) The test of transient voltage protection device
CN104251959B (en) A kind of system for detecting and positioning one-phase earthing failure in electric distribution network
CN203673023U (en) Terminal apparatus for detecting insulation condition of direct current system
CN105676066B (en) A kind of cable fault positioning examination device and method
CN104991162B (en) A kind of positioning device and application method of single-phase grounded malfunction in grounded system of low current
CN104217634B (en) Distribution true-value simulation test method
CN1332211C (en) DC power supply system grounded fault detecting method and circuit
CN201766351U (en) Device for selecting faulty line and eliminating faulty electric arc during single-phase ground fault of low-current grounding system
HU0700837A2 (en) Measuring system for localising and identifying a resistance of earth fault in active network and method for using the system
CN103779833B (en) DC leakage current detection and protection circuit and detection and guard method
CN103454555B (en) Based on the one-phase earthing failure in electric distribution network Section Location of parameter identification
CN104407272B (en) A kind of cable identification device
CN202126470U (en) Power cable insulation online monitoring device
CN104698291B (en) Three-phase four-wire system lacks zero curve Function detection circuit and detection method
CN202854252U (en) Real-time data acquisition and fault locating system of power distribution network
CN106353642B (en) The small current earthing wire-selecting and tuning methods of differential mode signal in short-term are controlled based on arc suppression coil access
CN103454544B (en) A kind of detection method based on the linear magnetism elimination circuit of electronic jumper
CN104181442A (en) Power distribution network single-phase earth fault section locating method based on correlation analysis

Legal Events

Date Code Title Description
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: 20150325

Termination date: 20151119