CN103513161A - Power transmission and transformation system fault searching locating instrument and searching method - Google Patents

Power transmission and transformation system fault searching locating instrument and searching method Download PDF

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Publication number
CN103513161A
CN103513161A CN201310451765.2A CN201310451765A CN103513161A CN 103513161 A CN103513161 A CN 103513161A CN 201310451765 A CN201310451765 A CN 201310451765A CN 103513161 A CN103513161 A CN 103513161A
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China
Prior art keywords
main frame
phase
signal
grounding
fault
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Granted
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CN201310451765.2A
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Chinese (zh)
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CN103513161B (en
Inventor
孙双春
陈文民
高明华
马广俊
马宏泽
肖军华
盖学海
杨义志
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China Petroleum and Chemical Corp
Electric Power Corp of Sinopec Shengli Petroleum Administration Bureau
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孙双春
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Priority to CN201310451765.2A priority Critical patent/CN103513161B/en
Publication of CN103513161A publication Critical patent/CN103513161A/en
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Publication of CN103513161B publication Critical patent/CN103513161B/en
Expired - Fee Related legal-status Critical Current
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

The invention relates to an electric power circuit fault detect device and detecting method, in particular to a power transmission and transformation system fault searching locating instrument and a searching method. The locating instrument comprises a host, a host accessory and a monitor. The host and the monitor are connected through the host accessory. In a test, a signal source outputs high-voltage signals to an electric power circuit grounding phase to break down a grounding point, and the grounding point is maintained in a grounding state through constant currents. The currents flow along the grounding phase of a grounding circuit and enter the ground through the grounding point, and a closed loop is formed with the ground. The signal monitor tracks the signal currents of the grounding circuit. Several important points are measured along the circuit with a bipartition method, and by detecting changing of the injected signals, the accurate positions of a grounding branch and the grounding points can be determined smoothly. The power transmission and transformation system fault searching locating instrument and the searching method have the advantages the positions of fault points can be accurately determined, rod ascending checking rod by rod is of no need, working efficiency is improved, and labor intensity is lowered.

Description

Electrical power trans mission/distribution system troubleshooting orientator and lookup method
Technical field
The present invention relates to a kind of feeder line fault pick-up unit and detection method, particularly a kind of electrical power trans mission/distribution system troubleshooting orientator and lookup method.
Background technology
The fault of transmission and distribution network is divided into two kinds substantially: a kind of is ground connection, and another kind is short circuit.China electric line branch is numerous, and this is the main cause that is difficult to locate trouble spot.The reason that earth fault occurs is a lot, and the frequency that the weakness that wherein insulate causes earth fault to occur is the highest, insulation weakness earth impedance not of uniform size, and some can reach 20k Ω or larger; Some insulation weakness earth impedance is linear (earth fault during low pressure), and other is nonlinear (earth fault during high pressure).And the presentation of insulation weakness is also diversified, as insulator contamination, cracking etc.Traditional ground connection or short trouble are determined abort situation by artificial line walking ocular estimate, waste time and energy, extremely inadaptable with the requirement of intelligent power network.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, and a kind of electrical power trans mission/distribution system troubleshooting orientator and lookup method are provided.
Its technical scheme is a kind of electrical power trans mission/distribution system troubleshooting orientator, it is characterized in that: comprise main frame, main frame annex and monitor, by main frame annex, connect main frame and monitor, described main frame is provided with power input terminal, signal output terminal, start-stop button, voltage indicating gauge, electric current indicating gauge, voltage-regulation button, and main frame annex comprises power lead, signal injection end line, signal injection ground connection end line, short circuit grounding test end line, earthing pole, insulation rod, ground clamp.
The insulating protection grade of above-mentioned main frame reaches withstand voltage level more than 35kV.
Above-mentioned monitor comprises detecting unit and gauge tap.
Above-mentioned insulation rod is telescopic insulation rod.
Above-mentioned main frame outside is provided with containment vessel.
Above-mentioned main frame annex is placed on inside, tool box.
A lookup method for electrical power trans mission/distribution system troubleshooting orientator, comprises the following steps:
1) connection: the power input terminal on main frame is by the external 220V power supply of power lead; Signal output terminal on main frame connects tested fault phase by signal injection end line; Host signal lead-out terminal is by signal injection ground connection end line access earthing pole;
2), when short trouble, short circuit grounding is tested to end line and be connected on fault phase.First determine any two-phase phase fault in three-phase: by signal injection power circuit Zhong Xiang,Jiang both sides mutually in any phase artificial ground, if monitor out current signal, this and middle phase short circuit; If no signal current, artificial ground is changed to another phase, and monitoring method is identical; If both sides are equal no signal current mutually, judge both sides phase short circuit, artificial ground and Injection Signal are accessed respectively to both sides phase, now survey short trouble identical with test earth fault method;
3) after main frame and main frame annex are connected, voltage indicating gauge and electric current indicating gauge show 0, press start button, rotational voltage regulates button, observes voltage indicating gauge and electric current indicating gauge, when electric current indicating gauge is designated as 50 MAHs, stop boosting, the gauge tap of opening monitor, chooses gear, first to the intermediate bar position of circuit, uses dichotomy to check, the cardinal principle orientation of the localization of faults, then determine the residing branch of fault, investigate successively, until locate successfully.
The invention has the beneficial effects as follows:
1. the accurate position of the localization of faults;
2. need not step on bar inspection by bar, increase work efficiency, reduce labour intensity;
3. be not subject to the impact of line distribution capacitance, can effectively solve the orientation problem in high resistance ground situation;
4. high-voltage signal source adopts ac power supply, and signal monitor adopts hand held structures, it is rechargeable battery powered to utilize, and is convenient to field operation, and dirigibility is high;
5. high-voltage signal source can guarantee to puncture earth fault, makes fault recurrence; Signal sensor strong interference immunity, utilizes " bisection method " online curb line test keypoint part, can find fast trouble spot;
6. technology maturation, reliability are high, are applicable to 6~35kV transmission and distribution network, are applicable to the various faults situations such as metallic earthing, arcing ground, transition resistance ground connection, phase fault.
Accompanying drawing explanation
Accompanying drawing 1 is main machine structure schematic diagram of the present utility model;
Accompanying drawing 2 is monitor structural representations of the present utility model;
Accompanying drawing 3 is main frame accessory structure schematic diagram of the present utility model;
Accompanying drawing 4 is explanation schematic diagram that fault Search and Orientation instrument is searched earth fault method;
Accompanying drawing 5 is schematic diagram of which line to line fault in judgement power circuit;
Accompanying drawing 6 is to judge after which two-phase line short, the schematic diagram of looking up the fault point;
In upper figure: power input terminal 1, signal output terminal 2, start-stop button 3, voltage indicating gauge 4, electric current indicating gauge 5, voltage-regulation button 6, power lead 7, signal injection end line 8, signal injection ground connection end line 9, short circuit grounding test end line 10, earthing pole 11, insulation rod 12, ground clamp 13, detecting unit E, gauge tap F.
Embodiment
By reference to the accompanying drawings 1, accompanying drawing 2, accompanying drawing 3, the invention will be further described:
The electrical power trans mission/distribution system troubleshooting orientator that the present invention mentions comprises main frame, main frame annex and monitor, by main frame annex, connect main frame and monitor, described main frame is provided with power input terminal 1, signal output terminal 2, start-stop button 3, voltage indicating gauge 4, electric current indicating gauge 5, voltage-regulation button 6, voltage-regulation button 6 is arranged on the center of main frame, and power input terminal 1, signal output terminal 2, start-stop button 3, voltage indicating gauge 4 and electric current indicating gauge 5 are located at the periphery at voltage-regulation button 6; Main frame annex comprises power lead 7, signal injection end line 8, signal injection ground connection end line 9, short circuit grounding test end line 10, earthing pole 11, insulation rod 12 and ground clamp 13, and described main frame annex is placed on 14 inside, tool box.
The insulating protection grade of main frame wherein reaches withstand voltage level more than 35kV, and monitor comprises detecting unit E and gauge tap F, and insulation rod is telescopic insulation rod, and main frame outside is provided with containment vessel, and earthing pole 11 adopts tee T structure.
A lookup method for electrical power trans mission/distribution system troubleshooting orientator, 1) connection: the power input terminal 1 on main frame is by the external 220V power supply of power lead 7; Signal output terminal 2 on main frame connects tested fault phase by signal injection end line 8; Host signal lead-out terminal 2 is by signal injection ground connection end line 9 access earthing poles 11;
2), when short trouble, short circuit grounding is tested to end line and be connected on fault phase.First determine any two-phase phase fault in three-phase: by signal injection power circuit Zhong Xiang,Jiang both sides mutually in any phase artificial ground, if monitor out current signal, this and middle phase short circuit; If no signal current, artificial ground is changed to another phase, and monitoring method is identical; If both sides are equal no signal current mutually, judge both sides phase short circuit, artificial ground and Injection Signal are accessed respectively to both sides phase.Now survey short trouble identical with test earth fault method;
3), after main frame and main frame annex are connected, voltage indicating gauge 4 shows 0 with electric current indicating gauge 5, presses start button, rotational voltage regulates button 6, observes voltage indicating gauge 4 and electric current indicating gauge 5, when electric current indicating gauge 5 is designated as 50 MAHs, stop boosting, open monitor 1-1 gauge tap, choose gear, first to the intermediate bar position of circuit, use dichotomy to check, the cardinal principle orientation of the localization of faults, then determine the residing branch of fault, investigate successively, until locate successfully.
With reference to Fig. 4, troubleshooting orientator is searched the explanation schematic diagram of earth fault method, and it is as follows that its concrete troubleshooting orientator is searched earth fault method:
Step 1: suppose certain circuit A phase N place ground connection in an arbitrary point, utilize so troubleshooting orientator at any electric pole M# bar A phase Injection Signal;
Step 2: use clamp on amperemeter both sides monitor signal before and after M# bar, not monitoring data side is healthy phases; Monitoring data side is Earth Phase, supposes M# bar rear side ground connection;
Step 3: monitor A phase conductor signal (can choose optional position electric pole) along M# bar rear side with clamp on amperemeter.N# bar place ground connection, before N# bar, (not comprising branch line) can monitor signal so; Otherwise, after N# bar (branch line that comprises N-2# bar place), there is no loop, will be without any signal; Judge that thus N# bar is earth fault.
In addition, troubleshooting orientator can be searched short circuit (and earth-free) trouble spot, any line to line fault in judgement power circuit,
(1) method that, judges which two phase conductor phase fault 5 is described as follows by reference to the accompanying drawings:
Step 1: by signal injection power circuit B phase, by C phase artificial ground, use clamp on amperemeter monitor signal in B phase (Injection Signal end rear side), if signal is normal, illustrate that BC two is conducted, BC phase fault, as figure (situation 1); If no signal, illustrates the not short circuit of BC two-phase, enter step 2;
Step 2: by signal injection power circuit B phase, by A phase artificial ground, use clamp on amperemeter monitor signal in B phase (Injection Signal end rear side), if signal is normal, illustrate that AB two is conducted, AB phase fault, as figure (situation 2); If no signal, illustrates the not short circuit of AB two-phase, enter step 3;
Step 3: if the alternate not short circuit of AB, the alternate not short circuit of BC, by the known AC line to line fault of exclusive method (situation 3);
The identical method validation AC of available step 1 is whether short circuit mutually, repeats no more.
(2), judge after any two-phase line short, looking up the fault point, 6 is described as follows by reference to the accompanying drawings:
Suppose that AC phase conductor is at the place's short circuit of N base electric pole (any line to line fault, the method for looking up the fault point is identical).Lookup method is as follows:
Step 1: in any electric pole M# bar A phase Injection Signal of certain circuit, C phase artificial ground;
Step 2: use clamp on amperemeter both sides monitor signal before and after M# bar, monitoring data side is short circuit end, supposes the short circuit of M# bar rear side;
Step 3: use clamp on amperemeter along M# bar rear side monitoring A phase conductor signal (can choose optional position electric pole);
Step 4: suppose N# bar AC line to line fault, N# bar can monitor signal in the past so; Otherwise, after N# bar, there is no loop, will be without any signal.Judge that thus N# bar is AC two-phase short-circuit fault point.
In test, signal source punctures earth point (during short trouble non-Injection Signal phase people for doing ground connection) to power circuit Earth Phase output high-voltage signal, and makes earth point remain at a ground state with constant current.This electric current flows along the Earth Phase of ground path, and clicks and enters ground through ground connection, forms closed-loop path with the earth;
The marking current on signal monitor earth wire road is sought track.Use " bisection method " online curb line to survey several vital points, by detecting the variation of Injection Signal, can determine smoothly the accurate location of ground connection branch and earth point.There is current signal Shi, trouble spot at test point back segment; Current signal is designated as Ling Shi, trouble spot at test point leading portion; Progressively dwindle fault coverage, until trouble spot is found out.
The lookup method of short circuit and ground connection is identical with the lookup method of single-phase earthing; The lookup method of three-phase shortcircuit is identical with the lookup method of two-phase phase fault.

Claims (7)

1. an electrical power trans mission/distribution system troubleshooting orientator, it is characterized in that: comprise main frame, main frame annex and monitor, by main frame annex, connect main frame and monitor, described main frame is provided with power input terminal (1), signal output terminal (2), start-stop button (3), voltage indicating gauge (4), electric current indicating gauge (5), voltage-regulation button (6), voltage-regulation button (6) is arranged on the center of main frame, power input terminal (1), signal output terminal (2), start-stop button (3), voltage indicating gauge (4) and electric current indicating gauge (5) are located at the periphery in voltage-regulation button (6), main frame annex comprises power lead (7), signal injection end line (8), signal injection ground connection end line (9), short circuit grounding test end line (10), earthing pole (11), insulation rod (12) and ground clamp (13), and described main frame annex is placed on inside, tool box (14).
2. electrical power trans mission/distribution system troubleshooting orientator according to claim 1, is characterized in that: the insulating protection grade of described main frame reaches withstand voltage level more than 35kV.
3. electrical power trans mission/distribution system troubleshooting orientator according to claim 1, is characterized in that: described monitor comprises detecting unit (E) and gauge tap (F).
4. electrical power trans mission/distribution system troubleshooting orientator according to claim 1, is characterized in that: described insulation rod is telescopic insulation rod.
5. electrical power trans mission/distribution system troubleshooting orientator according to claim 1, is characterized in that: described main frame outside is provided with containment vessel.
6. as a lookup method for the electrical power trans mission/distribution system troubleshooting orientator of the claims, it is characterized in that comprising following methods:
1) connection: the power input terminal on main frame (1) is by the external 220V power supply of power lead (7); Signal output terminal on main frame (2) connects tested fault phase by signal injection end line (8); Host signal lead-out terminal (2) is by signal injection ground connection end line (9) access earthing pole (11);
2), when short trouble, short circuit grounding is tested to end line and be connected on fault phase.
7. first determine any two-phase phase fault in three-phase: by signal injection power circuit Zhong Xiang,Jiang both sides mutually in any phase artificial ground, if monitor out current signal, this and middle phase short circuit; If no signal current, artificial ground is changed to another phase, and monitoring method is identical; If both sides are equal no signal current mutually, judge both sides phase short circuit, artificial ground and Injection Signal are accessed respectively to both sides phase, now survey short trouble identical with test earth fault method;
3) after main frame and main frame annex are connected, voltage indicating gauge (4) shows 0 with electric current indicating gauge (5), press start button, rotational voltage regulates button (6), observe voltage indicating gauge (4) and electric current indicating gauge (5), when electric current indicating gauge (5) is designated as 50 MAHs, stop boosting, the gauge tap (F) of opening monitor, chooses gear, first to the intermediate bar position of circuit, uses dichotomy to check, the cardinal principle orientation of the localization of faults, then determine the residing branch of fault, investigate successively, until locate successfully.
CN201310451765.2A 2013-09-27 2013-09-27 Electrical power trans mission/distribution system trouble shoot position indicator and lookup method Expired - Fee Related CN103513161B (en)

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN104655982A (en) * 2014-12-02 2015-05-27 国家电网公司 Patrol inspection system and method for single-phase-to-earth fault points of power distribution line
CN105510768A (en) * 2015-11-25 2016-04-20 国网河南桐柏县供电公司 Trouble shooting method for service live grounding
CN106646119A (en) * 2016-11-24 2017-05-10 国网山东省电力公司成武县供电公司 Ground fault search instrument, and ground fault point search method and system
CN107329050A (en) * 2017-08-18 2017-11-07 广东电网有限责任公司韶关供电局 A kind of circuitry fault detection method, detection means and detecting system
CN109633374A (en) * 2018-12-20 2019-04-16 孟小晶 A kind of low pressure fault to ground point intellectual search instrument and intellectual search method
CN110967595A (en) * 2019-11-15 2020-04-07 贵州电网有限责任公司 Portable non-contact distribution network ground fault detection positioning system
CN111337852A (en) * 2020-03-27 2020-06-26 戴呈玲 Distribution line fault detection method
CN111537835A (en) * 2020-04-26 2020-08-14 伟宸科技(武汉)有限公司 Small current grounding searching mode and device
CN111580011A (en) * 2020-04-28 2020-08-25 深圳供电局有限公司 Method, device and equipment for locating disconnection fault of circuit breaker control circuit
CN113295965A (en) * 2021-05-25 2021-08-24 国网山东省电力公司济南市济阳区供电公司 Distribution network ground fault positioning method, system and terminal

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104655982A (en) * 2014-12-02 2015-05-27 国家电网公司 Patrol inspection system and method for single-phase-to-earth fault points of power distribution line
CN105510768A (en) * 2015-11-25 2016-04-20 国网河南桐柏县供电公司 Trouble shooting method for service live grounding
CN106646119A (en) * 2016-11-24 2017-05-10 国网山东省电力公司成武县供电公司 Ground fault search instrument, and ground fault point search method and system
CN106646119B (en) * 2016-11-24 2019-05-10 国网山东省电力公司成武县供电公司 Earth fault searches instrument, earth fault lookup method and system
CN107329050A (en) * 2017-08-18 2017-11-07 广东电网有限责任公司韶关供电局 A kind of circuitry fault detection method, detection means and detecting system
CN109633374A (en) * 2018-12-20 2019-04-16 孟小晶 A kind of low pressure fault to ground point intellectual search instrument and intellectual search method
CN110967595A (en) * 2019-11-15 2020-04-07 贵州电网有限责任公司 Portable non-contact distribution network ground fault detection positioning system
CN111337852A (en) * 2020-03-27 2020-06-26 戴呈玲 Distribution line fault detection method
CN111537835A (en) * 2020-04-26 2020-08-14 伟宸科技(武汉)有限公司 Small current grounding searching mode and device
CN111537835B (en) * 2020-04-26 2022-07-26 伟宸科技(武汉)有限公司 Small current grounding searching mode and device
CN111580011A (en) * 2020-04-28 2020-08-25 深圳供电局有限公司 Method, device and equipment for locating disconnection fault of circuit breaker control circuit
CN113295965A (en) * 2021-05-25 2021-08-24 国网山东省电力公司济南市济阳区供电公司 Distribution network ground fault positioning method, system and terminal

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Inventor after: Du Zhengwang

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