CN203825142U - Power supply line fault locating instrument - Google Patents
Power supply line fault locating instrument Download PDFInfo
- Publication number
- CN203825142U CN203825142U CN201320888742.3U CN201320888742U CN203825142U CN 203825142 U CN203825142 U CN 203825142U CN 201320888742 U CN201320888742 U CN 201320888742U CN 203825142 U CN203825142 U CN 203825142U
- Authority
- CN
- China
- Prior art keywords
- collecting unit
- speed acquisition
- cpu processor
- low impedance
- satellite signal
- 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.)
- Expired - Fee Related
Links
Landscapes
- Locating Faults (AREA)
Abstract
The utility model discloses a power supply line fault locating instrument. The locating instrument comprises an electronic PT acquisition unit, a power supply module, a time synchronous circuit, a satellite signal receiver, a satellite antenna, a CT acquisition unit, a high resistance-to-low resistance channel, a high-speed acquisition AD conversion unit, a CPU processor, a display screen, A GPRS module, and a 3G antenna. The satellite signal receiver is connected with the time synchronous circuit. The time synchronous circuit is connected with the CPU processor. The electronic PT acquisition unit is connected with the high resistance-to-low resistance channel. The high resistance-to-low resistance channel is connected with the high-speed acquisition AD conversion unit. The CT acquisition unit is connected with the high-speed acquisition AD conversion unit. The high-speed acquisition AD conversion unit is connected with the CPU processor. According to the utility model, the accurate transmission and transformation of high-frequency voltage traveling waves are realized and the accurate locating and range finding of faults of overhead lines and underground cables are also realized.
Description
Technical field
The utility model relates to a kind of supply line fault locating instrument, belongs to electrical equipment technical field.
Background technology
China's power department extensively adopts the fault detector of electromechanical integration on 10kV power distribution network at present, and after breaking down, the fault detector that send pipeline rider to search action along circuit is determined abort situation.Because power distribution network branched line is many, looking up the fault is very inconvenient, often expends a large amount of human and material resources and time.Especially underground cable, its detection and location are just more difficult.
Domestic 10kV～66kV power network neutral point is to adopt non_direct ground mode substantially.When being defined in non-direct ground system generation single-phase earthing, electric system code can work two hours.If permanent earth need to disconnect ground path in two hours.It is out of order more than 70% that the fault that single-phase earthing occurs in neutral point isolated neutral system accounts for institute.Aspect the detection method and means to fault, for small current neutral grounding system, in the time there is singlephase earth fault, due to the criterion that does not have obvious curent change feature as earth fault, search this fault is a global difficult problem always.Prior art mainly contains higher hamonic wave zero-sequence component on-line measurement method, higher hamonic wave zero-sequence component off-line measurement method, real component method, neutral grounding by small resistance, Injection Current method, transient signal measurements and calculations method, Low frequency signal injection method etc.In said method, have plenty of and be only suitable for the use in transformer station, when the use on the line having, accuracy is poor, or expense is too high, is not suitable for promoting in distribution system.For various reasons, effect is unsatisfactory for the domestic localization of fault line selection apparatus putting into operation at present.
Application number is that the patent documentation of 99123488.X discloses a kind of fault locating system, utilize " GPS " (Global Positioning System (GPS)) clock to time, main website and the capable ripple of substation reception false voltage are installed at circuit two ends, are calculated in main website and substation circuit two ends elder generation's localization of faults afterwards that the capable ripple of false voltage arrives.It is to be noted when underground cable breaks down, because cable is capacitive, can not produce immediately obvious decline according to delay effect voltage, just decline through regular hour voltage.Causing fault locator not obtain immediately failure message judges soundly to trouble spot.Judge the impact bringing to fault for the time delay of above-mentioned cable fault voltage traveling wave, this patent documentation does not provide solution.
Whether correctly can there is not delay effect in the transmission for the capable ripple of false voltage of overhead transmission line, but effectively extract for travelling wave signal the mutual inductor progress of disease high frequency transient amount that depends on.Research shows, current transformer can the progress of disease up to the current traveling wave signal of 100kHz, but be a difficult problem for the progress of disease of HF voltage row ripple, at present, on high-voltage fence, widely used capacitance type potential transformer (CVT) is because cutoff frequency is too low, row ripple progress of disease characteristic is not good, and the application of voltage traveling wave location and telemetry is extremely restricted.And the technical scheme about HF voltage row ripple progress of disease device is not disclosed in the patent documentation that application number is 99123488.X.
Utility model content
The purpose of this utility model is to provide a kind of supply line fault locating instrument and Fault Locating Method, and prior art is improved, and realizes the accurate progress of disease of HF voltage row ripple, can accurately locate and find range for the fault of overhead transmission line and underground cable.
The purpose of this utility model is achieved by the following technical programs:
A kind of supply line fault locating instrument, comprises electronics PT collecting unit 2, power module 3, time synchronized circuit 4, satellite signal receiver 5, satellite antenna 6, CT collecting unit 7, high resistant becomes low impedance path 8, high speed acquisition AD converting unit 9, CPU processor 10, display screen 11, GPRS module 12, 3G antenna 13, described power module 3 is given electronics PT collecting unit 2, time synchronized circuit 4, satellite signal receiver 5, high resistant becomes low impedance path 8, high speed acquisition AD converting unit 9, CPU processor 10, display screen 11, GPRS module 12 is powered, described satellite antenna 6 is connected with satellite signal receiver 5, satellite signal receiver 5 is connected with time synchronized circuit 4, described time synchronized circuit 4 is connected with CPU processor 10, described electronics PT collecting unit 2 becomes low impedance path 8 with high resistant and is connected, and high resistant becomes low impedance path 8 and is connected with high speed acquisition AD converting unit 9, and CT collecting unit 7 is connected with high speed acquisition AD converting unit 9, described high speed acquisition AD converting unit 9 is connected with CPU processor 10, described display screen 11, GPRS module 12 is connected with CPU processor 10 respectively, and described 3G antenna 13 is connected with GPRS module 12.
The purpose of this utility model can also further realize by following technical measures:
Aforementioned supply line fault locating instrument, wherein electronics PT collecting unit 2 comprises discharge tube, multiple noninductive resistance, described multiple noninductive resistance is connected, at the two ends of series circuit access high pressure, multiple noninductive resistances dividing potential drop of connecting, adopt 2 resistance to carry out parallel connection at dividing potential drop output terminal, and at a discharge tube of dividing potential drop output terminal access in parallel; Described high resistant becomes low impedance path 8 and comprises 2 amplifiers, and electronics PT collecting unit 2 is sent into the signal after step-down respectively normal phase input end that high resistant becomes 2 amplifiers of low impedance path 8 and carry out the homophase differential amplification of signal.
Aforementioned supply line fault locating instrument, wherein satellite signal receiver 5 is accepted Big Dipper satellite signal.
Compared with prior art, the beneficial effects of the utility model are: realized the accurate progress of disease of the HF voltage row ripple of overhead transmission line, adopt instantaneous voltage electric current product term maximum value failure judgement for the earth fault of underground cable, the problem that has solved the judgement of voltage traveling wave delay fault, the utility model can accurately be located and find range the fault of overhead transmission line and underground cable.
Brief description of the drawings
Fig. 1 is fault locating instrument circuit diagram of the present utility model;
Fig. 2 is the utility model fault locating instrument electronics PT collecting unit circuit diagram;
Fig. 3 is the utility model fault locating instrument high resistant step-down resistance channel circuit figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the utility model supply line fault locating instrument comprises electronics PT collecting unit 2, power module 3, time synchronized circuit 4, satellite signal receiver 5, satellite antenna 6, CT collecting unit 7, high resistant becomes low impedance path 8, high speed acquisition AD converting unit 9, CPU processor 10, display screen 11, GPRS module 12, 3G antenna 13, described power module 3 is given electronics PT collecting unit 2, time synchronized circuit 4, satellite signal receiver 5, high resistant becomes low impedance path 8, high speed acquisition AD converting unit 9, CPU processor 10, display screen 11, GPRS module 12 is powered, described satellite antenna 6 is connected with satellite signal receiver 5, satellite signal receiver 5 is connected with time synchronized circuit 4, described time synchronized circuit 4 is connected with CPU processor 10, described electronics PT collecting unit 2 becomes low impedance path 8 with high resistant and is connected, and high resistant becomes low impedance path 8 and is connected with high speed acquisition AD converting unit 9, and CT collecting unit 7 is connected with high speed acquisition AD converting unit 9, described high speed acquisition AD converting unit 9 is connected with CPU processor 10, described display screen 11, GPRS module 12 is connected with CPU processor 10 respectively, and described 3G antenna 13 is connected with GPRS module 12.As shown in Figure 2, electronics PT collecting unit 2 comprises discharge tube D1, noninductive resistance R1, R2, R3, R4, R5, described noninductive resistance R1, R2, R3, R4 connect, at the two ends accesses high pressure of series circuit, described noninductive resistance R1, R2, R3, the R4 dividing potential drop of connecting, a resistance R 5 in parallel and discharge tube D1 again at dividing potential drop output terminal R4 two ends, adopt R4, R5, D1 parallel connection at dividing potential drop output terminal, that high pressure enters high resistant step-down resistance channel circuit, damages components and parts in order to prevent that resistance from damaging.As shown in Figure 3, described high resistant becomes low impedance path 8 and comprises 2 amplifier U1A, U1B, and the normal phase input end that electronics PT collecting unit 2 is sent into 2 amplifiers from PT1-1, PT2-1 respectively by the signal after step-down carries out the homophase differential amplification of signal.The utility model is in order accurately to extract voltage traveling wave signal, specialized designs electronics PT collecting unit 2, got rid of the wave form distortion that voltage traveling wave causes through existing capacitance type potential transformer.It should be noted that, in high resistant situation, high-frequency signal can produce decay, must increase the passage of high resistant step-down resistance, to ensure the detection of fault traveling wave signal.High resistant of the present utility model becomes low impedance path 8 and adopts homophase differential amplification, and travelling wave signal has been carried out to effective amplification.
Satellite signal receiver 5 of the present utility model is accepted Big Dipper satellite signal, and dipper system is Double-Star Positioning System, and response speed is less than 1 second, is better than gps system.Satellite signal receiver 5 receives satellite timing signal, passes to time synchronized circuit 4, and fault locating instrument is synchronizeed with satellite clock signal, and the accuracy of measurement data gets a promotion.
Described voltage traveling wave signal is delivered to CPU processor 10 through electronics PT collecting unit 2, high resistant change low impedance path 8, high speed acquisition AD converting unit 9, and current traveling wave signal is delivered to CPU processor 10 through CT collecting unit 7, high speed acquisition AD converting unit 9.GPRS module 12 is for sending the fault-signal gathering with note form to grid monitoring system server.
Use described supply line fault instrument to carry out Fault Locating Method, comprising:
Supply line's fault locating instrument is installed on to the two ends of every circuit of electrical network, and every circuit is at least installed two, in the time breaking down in certain position of an electrical network circuit, trouble spot can produce one group of false voltage current traveling wave and propagate to circuit two ends, carry out synchronously owing to adopting satellite timing signal, the data sampling time sequence of each supply line fault locating instrument is synchronous, therefore the supply line's fault locating instrument that can put two ends according to line fault receives the mistiming of fault traveling wave and calculates position of failure point, the time synchronized circuit of each supply line's fault locating instrument is accepted Beidou satellite system or gps satellite system timing signal, make all supply lines fault locating instrument synchronous, ensure the accurate of range finding.
For underground cable line, the instantaneous discharge fault current of isolated neutral system power transmission cable is larger, but change in voltage is not generally very large, and because IV product numerical value is larger, trouble spot direction can easily detect.Therefore, for underground cable line instantaneous discharge fault, adopt instantaneous voltage electric current product term maximum value direction determining method, be that supply line's fault locating instrument detects when electric current and voltage product term is undergone mutation, measured value before and after sudden change is delivered to system server, detect product term maximum value side and undergo mutation, and between the positive and negative two relative measurement points of direction as fault section.
For overhead transmission line, calculate the synthetic residual voltage Vo of three-phase, calculate the phasing degree of Vo, when non-fault, residual voltage Vo vector is zero, and when there is earth fault, residual voltage Vo undergos mutation at phasing degree, measured value before and after sudden change is delivered to system server, according to the variation failure judgement interval at phasing degree, two ends.Also can gather current signal, calculate the synthetic zero-sequence current Io of three-phase, calculate the phasing degree of Io, when non-fault, zero-sequence current Io vector is zero, and when there is earth fault, zero-sequence current Io undergos mutation at phasing degree, measured value before and after sudden change is delivered to system server, according to the variation failure judgement interval at phasing degree, two ends.
In addition to the implementation, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (3)
1. supply line's fault locating instrument, is characterized in that, comprises electronics PT collecting unit (2), power module (3), time synchronized circuit (4), satellite signal receiver (5), satellite antenna (6), CT collecting unit (7), high resistant becomes low impedance path (8), high speed acquisition AD converting unit (9), CPU processor (10), display screen (11), GPRS module (12), 3G antenna (13), described power module (3) is given electronics PT collecting unit (2), time synchronized circuit (4), satellite signal receiver (5), high resistant becomes low impedance path (8), high speed acquisition AD converting unit (9), CPU processor (10), display screen (11), GPRS module (12) power supply, described satellite antenna (6) is connected with satellite signal receiver (5), satellite signal receiver (5) is connected with time synchronized circuit (4), described time synchronized circuit (4) is connected with CPU processor (10), described electronics PT collecting unit (2) becomes low impedance path (8) with high resistant and is connected, high resistant becomes low impedance path (8) and is connected with high speed acquisition AD converting unit (9), CT collecting unit (7) is connected with high speed acquisition AD converting unit (9), described high speed acquisition AD converting unit (9) is connected with CPU processor (10), described display screen (11), GPRS module (12) is connected with CPU processor (10) respectively, and described 3G antenna (13) is connected with GPRS module (12).
2. supply line as claimed in claim 1 fault locating instrument, it is characterized in that, described electronics PT collecting unit (2) comprises discharge tube, multiple noninductive resistance, described multiple noninductive resistance is connected, at the two ends of series circuit access high pressure, multiple noninductive resistances dividing potential drop of connecting, adopts 2 resistance to carry out parallel connection at dividing potential drop output terminal, and at a discharge tube of dividing potential drop output terminal access in parallel; Described high resistant becomes low impedance path (8) and comprises 2 amplifiers, and electronics PT collecting unit (2) is sent into the signal after step-down respectively normal phase input end that high resistant becomes 2 amplifiers of low impedance path (8) and carry out the homophase differential amplification of signal.
3. supply line as claimed in claim 1 fault locating instrument, is characterized in that, described satellite signal receiver (5) is accepted Big Dipper satellite signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888742.3U CN203825142U (en) | 2013-12-31 | 2013-12-31 | Power supply line fault locating instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888742.3U CN203825142U (en) | 2013-12-31 | 2013-12-31 | Power supply line fault locating instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825142U true CN203825142U (en) | 2014-09-10 |
Family
ID=51480624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320888742.3U Expired - Fee Related CN203825142U (en) | 2013-12-31 | 2013-12-31 | Power supply line fault locating instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825142U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884959A (en) * | 2013-12-31 | 2014-06-25 | 江苏省电力公司镇江供电公司 | Power supply line fault locating instrument and fault locating method |
| CN104391225A (en) * | 2014-11-25 | 2015-03-04 | 国网河南省电力公司南阳供电公司 | Fault detection and communication positioning method for transmission line |
| CN105467274A (en) * | 2015-12-24 | 2016-04-06 | 国网浙江武义县供电公司 | Device for fault detection and positioning of single-phase grounding of power distribution network |
| RU2785203C1 (en) * | 2022-04-15 | 2022-12-05 | Общество с ограниченной ответственностью "Система" | Apparatus for monitoring the condition of a power transmission line |
| WO2023200371A1 (en) * | 2022-04-15 | 2023-10-19 | Общество с ограниченной ответственностью "Система" | Device for monitoring the state of an electric power transmission line |
-
2013
- 2013-12-31 CN CN201320888742.3U patent/CN203825142U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884959A (en) * | 2013-12-31 | 2014-06-25 | 江苏省电力公司镇江供电公司 | Power supply line fault locating instrument and fault locating method |
| CN104391225A (en) * | 2014-11-25 | 2015-03-04 | 国网河南省电力公司南阳供电公司 | Fault detection and communication positioning method for transmission line |
| CN104391225B (en) * | 2014-11-25 | 2017-05-03 | 国网河南省电力公司南阳供电公司 | Fault detection and communication positioning method for transmission line |
| CN105467274A (en) * | 2015-12-24 | 2016-04-06 | 国网浙江武义县供电公司 | Device for fault detection and positioning of single-phase grounding of power distribution network |
| CN105467274B (en) * | 2015-12-24 | 2019-02-26 | 国网浙江武义县供电公司 | A kind of detection of one-phase earthing failure in electric distribution network and positioning device |
| RU2785203C1 (en) * | 2022-04-15 | 2022-12-05 | Общество с ограниченной ответственностью "Система" | Apparatus for monitoring the condition of a power transmission line |
| WO2023200371A1 (en) * | 2022-04-15 | 2023-10-19 | Общество с ограниченной ответственностью "Система" | Device for monitoring the state of an electric power transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101232176B (en) | Non-effective earthing distribution system fault locating method based on neutral point of transient traveling wave | |
| CN103293443B (en) | A kind of distribution network overhead line Earth design method | |
| CN102221660B (en) | On-line positioner of small current earth fault | |
| CN102129009B (en) | Method for measuring positive sequence parameters of ultra-high voltage transmission line based on double end measuring information | |
| CN106771870A (en) | A kind of distribution net work earthing fault localization method and system | |
| CN102944814A (en) | Power distribution network single-phase earth fault locating method based on transient state | |
| CN102221662A (en) | Small current grounding system single phase earth fault traveling wave line selection and distance measurement apparatus | |
| CN102135571B (en) | Anti-interference measurement method for zero sequence impedance of super-high-voltage/ultrahigh-voltage multi-loop power transmission line | |
| CN203350392U (en) | Fault locating system for high tension transmission line | |
| CN100561238C (en) | A kind of method and device that utilizes power frequency interference source live line measurement mutual inductance circuit zero-sequence impedance parameter | |
| CN101201380A (en) | Method for faulty orientation and subsection of power system low current grounding | |
| CN201993433U (en) | Travelling wave distance measurement system for grounding electrode line of high voltage direct current (HVDC) transmission system | |
| CN103837799B (en) | A kind of frequency domain method of voltage DC ground electrode circuit fault based on R-L model range finding | |
| CN101975911B (en) | Earth fault judging method for overhead line fault indicator | |
| CN108303614B (en) | 10kV cable network low-current grounding system fault positioning system and method | |
| CN104267313A (en) | Micro grid system feeder line fault type distinguishing and fault point positioning method | |
| CN104793106A (en) | Distribution network line fault section positioning method based on current break rate | |
| CN203825142U (en) | Power supply line fault locating instrument | |
| CN102064537A (en) | Method for judging and processing single-phase earth faults by using electronic mutual inductor | |
| CN104237738A (en) | Distribution feeder single-phase grounding location system and location method | |
| CN101545944A (en) | Method for locating single-phase ground fault of a low current grounding system power distribution network | |
| CN103884959A (en) | Power supply line fault locating instrument and fault locating method | |
| CN204495898U (en) | A kind of transformer superpotential on-line monitoring system | |
| CN108710064A (en) | A kind of zero sequence active component molded line line fault indicator | |
| CN107219443B (en) | Transient wave recording indicator |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20161231 |