CN102087330A - Ultrahigh-tension line fault detection and location method and fault detection and location device - Google Patents
Ultrahigh-tension line fault detection and location method and fault detection and location device Download PDFInfo
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Abstract
The invention relates to the field of power monitoring, in particular to an ultrahigh-tension line fault detection and location method and a fault detection and location device. The method comprises the following steps: sampling the current phase information at the two ends of a high-tension line to be detected at the same time respectively to obtain phi1 and phi2; calculating difference between phi1 and phi2 to obtain the difference psi=phi1-phi2; setting an alarm value, wherein when psi is greater than the alarm value, the high-tension line to be detected has fault; and after judging that the high-tension line to be detected has fault, sending fault information to the outside. The fault detection and location device comprises a fault detection module, a fault analysis module and a fault signal output module, wherein the fault detection module comprises a local end measurer as well as an opposite end measurer; the local end measurer and the opposite end measurer are connected to the fault analysis module respectively; and the fault analysis module is connected with the fault signal output module. According to the invention, the fault detection for the high-tension line is simple, accurate, quick and the like, the workload of line searching can be effectively reduced, and the fault repairing time can be shortened.
Description
Technical field
The present invention relates to the electric power monitoring field, be specifically related to a kind of supertension line fault detecting and positioning method supertension line fault detecting and positioning method and fault detect locating device.
Background technology
Along with the continuous development of electric system, UHV (ultra-high voltage), long distance transmission line get more and more, and the accurate location of line fault point more shows its importance.Seek the workload of looking into for reducing circuit, shorten fault correction time, save great amount of manpower and material resources, improve power supply reliability, reduce loss of outage, strengthen also improving system's operation and management level, press for when breaking down and accurately to search the trouble spot in system.
Quick, the accurate location of ultra-high-tension power transmission line fault can not get solving preferably for a long time, and this directly influences the service restoration time of faulty line, has brought white elephant also for circuit operation maintenance personnel.In order to solve this difficult problem, localization of fault has been carried out further investigation widely both at home and abroad.
The line fault point location is searched way at present generally has following several:
1. utilize the routine location of steady-state quantity
Based on the localization of fault of fault steady-state quantity is the focus of research both at home and abroad always, has formed the localization method of multiple maturations such as single-ended, multiterminal, impedance, parsing.In theory, these Fault Locating Method precision are very high, and EM TP simulation result shows that positioning error is all in the scope of total track length 1%.But the following point that more or less exists in service at the scene: 1. be subjected to the influence of the progress of disease characteristic of voltage, current transformer; 2. be subjected to line parameter circuit value and influence on system parameters; 3. fault transient harmonic effects measuring accuracy.Therefore the conventional fault locating device moves unsatisfactory at the scene.In addition, on the fault oscillograph of present domestic operation with localization of fault software, general adopt the impedance localization method, based on lumped parameter model, have the numerical solution convergence and the pseudo-root problem of range finding equation, for the accurate location difficulty particularly of high resistance earthing fault.
2. go the ripple localization method
People recognize that very early detecting voltage, the travel-time of current traveling wave between bus and trouble spot can measure fault distance.Owing to go velocity of wave propagation near the light velocity, and be not subjected to the influence of factors such as trouble spot resistance, line construction and mutual inductor mapping fault, therefore higher measuring accuracy is arranged.Traveling-wave device adopts based on single-end electrical quantity A type, the E type distance-finding method that utilizes the D type of both-end electric parameters and utilize the reclosing signal.Line fault row ripple is a kind of high frequency transient signal with emergent properties, non-stationary variation, is wherein comprising abundant failure message (equating as fault distance, fault).Wavelet transformation technique is a kind of strong mathematical tool of transient signal of analyzing that development in recent years is got up, and it is applied to the analysis of fault traveling wave signal, can correctly extract and discern these failure messages, solves the automatic recognition problem of the capable wave-wave shape of one-end fault.
The key of row ripple location be the time synchronously and the seizure of row wave-wave head, mainly have following problem at present: the 1. stability of gps clock and precision; 2. the capable ripple jump signal that is produced by the silicon threshold switch of switching overvoltage, induced overvoltage and the direct current rectification of electric system etc. may make the malfunction of capable ripple locating device; 3. voltage zero cross near fault constantly, row wave-wave head is mild, accurately catches row ripple due in difficulty; 4. close-in fault is subjected to the restriction of sample frequency, detection difficult; 5. the ripple of going transmits dispersion characteristics, causes the decay and the distortion of row wave-wave head, and row wave-wave head slows down, influence row ripple bearing accuracy.Be subjected to the restriction of above factor, row is about, and the row ripple is positioned at on-the-spot operation and also is subjected to certain restriction.
Summary of the invention
The object of the present invention is to provide a kind of supertension line fault detecting and positioning method, to solve the problems of the technologies described above.
The present invention also aims to provide a kind of fault detect locating device, to solve the problems of the technologies described above.
The supertension line fault detecting and positioning method is characterized in that: comprise the steps:
(1) respectively the two ends current phase information that is in the hi-line to be measured under the "on" position is sampled simultaneously, obtain current phase information and be respectively Ф 1, Ф 2;
(2) two current phase information are asked poor, obtain difference Ψ, i.e. Ψ=Ф 1-Ф 2;
(3) set a warning value about Ψ, when Ψ is higher than warning value, think described hi-line fault to be measured;
(4) after judging described hi-line fault to be measured, send failure message to the external world.
Can judge whether fault of described hi-line to be measured simply, precisely, fast by technique scheme.The described hi-line to be measured of multistage is set respectively in the whole piece supertension line, and when carrying out the supertension line fault detecting and positioning method, can judge accurately and fast is which section hi-line breaks down.Can effectively reduce circuit and seek the workload of looking into, shorten fault correction time.Help to save great amount of manpower and material resources, improve power supply reliability, reduce loss of outage, strengthen and improve system's operation and management level.
The warning value of Ψ is preferably set to 90 degree.Be set at 90 at the warning value of Ψ and have better anti-jamming capability when spending.
In step (4), the mode that sends failure message to the external world is to send failure message by cell phone network.
The fault detect locating device comprises a failure analysis module and a fault-signal output module, it is characterized in that, described failure analysis module is provided with a fault detection module, described fault detection module comprises that one is used to be arranged on the local terminal measuring appliance of hi-line one end to be measured, described local terminal measuring appliance comprises a home terminal current phase sample module, and described home terminal current phase sample module inserts described hi-line to be measured one end;
Described fault detection module comprises that also one is used to be arranged on the opposite end measuring appliance of the hi-line other end to be measured, and described opposite end measuring appliance comprises pair of end current phase sampling module, and described opposite end current phase sampling module inserts the described hi-line other end to be measured;
Described local terminal measuring appliance and opposite end measuring appliance insert described failure analysis module respectively, described failure analysis module is according to described home terminal current phase sample module and described opposite end current phase sampling module, and the phase difference value size of the current phase information that the same time collects is respectively judged the failure condition of described hi-line to be measured;
Described failure analysis module connects described fault-signal output module, exports the failure condition of described hi-line to be measured to the external world.
Described home terminal current phase sample module and opposite end current phase sampling module are the device that described hi-line curtage phase place to be measured is sampled.Can adopt current transformer or voltage transformer (VT) to insert described hi-line to be measured.Can obtain the curtage phase place by measuring the voltage that the induction of current transformer or voltage transformer (VT) produces or the situation of change of current value in the concrete sampling process.
Described failure analysis module is provided with a phase bits comparison module, described home terminal current phase sample module inserts described bits comparison module mutually respectively with described opposite end current phase sampling module, be provided with a warning value in the described phase bits comparison module, when the phase differential between described home terminal current phase sample module and the described opposite end current phase sampling module during greater than described warning value, described phase bits comparison module is considered as the fault of described hi-line to be measured.
Described fault-signal output module comprises a communication module, and the signal input part of described communication module connects described failure analysis module, and the signal output part of described communication module connects a wireless signal transmission antenna.So that send information to the external world by wireless signal.
Because the current phase information at two ends can be no longer consistent when hi-line fault to be measured, therefore two current phase information be compared and to draw the conclusion whether hi-line to be measured breaks down by described failure analysis module.The present invention utilize to detect the phase place of real-time current and judges, the influence that excessive resistance that is produced in the time of can overcoming various fault and frequency change are brought.
Described home terminal current phase sample module and opposite end current phase sampling module insert described hi-line to be measured by current transformer respectively.With hi-line to be measured without any being electrically connected, can better guarantee the normal operation of original system, further guarantee trouble free service.
The fault-signal output module adopts a wireless signal sending module.Described failure analysis module sends the information that comprises failure message by described wireless signal sending module to the external world.Described wireless signal sending module can also comprise information such as positional information, fault type in the information that the external world sends.
Described wireless signal sending module can adopt a wireless communication module based on the mobile phone networking.The field personnel only needs the mode by the note reception, can search the position that line fault takes place quickly and accurately, has reduced greatly because line walking is searched the time of trouble spot, has shortened power off time.
When described failure analysis module detects warning value Ψ and is higher than warning value, generate failure message, and send described failure message to described wireless communication module, described wireless communication module sends the information that comprises failure message to the external world.Reduce the information traffic volume when not having fault at ordinary times, to save resource.
Described failure analysis module is provided with a self-detection module, described self-detection module generates ego state information by detecting described failure analysis module duty, and regularly sends the information that comprises self-duty to the external world by described wireless communication module.So that external device is known the duty of each described failure analysis module, so that when described failure analysis module breaks down, in time overhaul.
Contain the condition code that each described failure analysis module is provided with in the information that described ego state information is sent in sending, so that the different described failure analysis module of external device identification, and each described failure analysis module of simultaneous verification sends the accuracy of information.Described condition code design can be with reference to the check code in the existing communication protocol.
Beneficial effect: owing to adopt technique scheme, the present invention is simple, accurate, quick to the fault detect of high-tension line, and adopt wireless signal transmission techniques to carry out fault alarm, greatly facilitate fault detect work, can effectively reduce circuit and seek the workload of looking into, shorten fault correction time.
Description of drawings
Fig. 1 is the FB(flow block) of supertension line fault detecting and positioning method of the present invention;
Fig. 2 is the circuit theory diagrams of fault detect locating device of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
With reference to Fig. 1, Fig. 2, the supertension line fault detecting and positioning method comprises the steps: that (1) sample to the two ends current phase information that is in the hi-line to be measured under the "on" position respectively simultaneously, obtains current phase information and is respectively Ф 1, Ф 2; (2) two current phase information are asked poor, obtain difference Ψ, i.e. Ψ=Ф 1-Ф 2; (3) set warning value, when Ψ is higher than warning value, think hi-line fault to be measured; (4) after judging hi-line fault to be measured, send failure message to the external world.Can judge whether fault of hi-line to be measured simply, precisely, fast by technique scheme.
The fault detect locating device, comprise failure analysis module 2 and fault-signal output module 3, failure analysis module 2 comprises fault detection module, fault detection module comprises local terminal measuring appliance 11, local terminal measuring appliance 11 comprises home terminal current phase sample module, and home terminal current phase sample module inserts hi-line one end to be measured; Fault detection module also comprises opposite end measuring appliance 12, and opposite end measuring appliance 13 comprises opposite end current phase sampling module, and opposite end current phase sampling module inserts the hi-line other end to be measured.
Home terminal current phase sample module and opposite end current phase sampling module are the device that hi-line curtage phase place to be measured is sampled.Can adopt current transformer or voltage transformer (VT) to insert hi-line to be measured.Can obtain the curtage phase place by measuring the voltage that the induction of current transformer or voltage transformer (VT) produces or the situation of change of current value in the concrete sampling process.
Local terminal measuring appliance 11 and opposite end measuring appliance 12 insert failure analysis module 2 respectively, failure analysis module 2 is according to home terminal current phase sample module and opposite end current phase sampling module, and the phase difference value size of the current phase information that the same time collects is respectively judged the failure condition of hi-line to be measured.Failure analysis module 2 connects fault-signal output module 3, exports the failure condition of hi-line to be measured to the external world.
Failure analysis module 2 is provided with a phase bits comparison module, home terminal current phase sample module inserts bits comparison module mutually respectively with opposite end current phase sampling module, be provided with a warning value in the phase bits comparison module, when the phase differential between home terminal current phase sample module and the opposite end current phase sampling module during greater than warning value, the phase bits comparison module is considered as the fault of hi-line to be measured.
Because the current phase information at two ends can be no longer consistent when hi-line fault to be measured, therefore compare and to draw the conclusion whether hi-line to be measured breaks down by 2 pairs of two current phase information of failure analysis module.The present invention utilize to detect the phase place of real-time current and judges, the influence that excessive resistance that is produced in the time of can overcoming various fault and frequency change are brought.Home terminal current phase sample module and opposite end current phase sampling module insert hi-line to be measured by current transformer respectively, with hi-line to be measured without any being electrically connected, can better guarantee the normal operation of original system, further guarantee trouble free service.Fault-signal output module 3 comprises a communication module, and the signal input part of communication module connects failure analysis module, and the signal output part of communication module connects a wireless signal transmission antenna.So that send information to the external world by wireless signal.
Fault-signal output module 3 adopts the wireless signal sending module.Failure analysis module 2 sends the information that comprises failure message by the wireless signal sending module to the external world.The wireless signal sending module can also comprise information such as positional information, fault type in the information that the external world sends.The wireless signal sending module can adopt the wireless communication module based on the mobile phone networking.The field personnel only needs the mode by the note reception, can search the position that line fault takes place quickly and accurately, has reduced greatly because line walking is searched the time of trouble spot, has shortened power off time.
Exemplifying embodiment
Use the present invention to detect hi-line to be measured fault whether between adjacent two shaft tower A, the shaft tower B.The local terminal measuring appliance 11 of fault detect locating device is arranged on shaft tower A place, opposite end measuring appliance 12 is arranged on shaft tower B place, failure analysis module 2 and fault-signal output module 3 are arranged on any place among shaft tower A or the shaft tower B, and the warning value in the assumed fault analysis module 2 is 90 degree.
When circuit normally moves, the current phase that local terminal measuring appliance 11 and opposite end measuring appliance 12 record is respectively Ф 1, Ф 2, and send Ф 1, Ф 2 to failure analysis module 2 respectively, failure analysis module 2 is calculated current phase difference Ψ=Ф 1-Ф 2 ≈ 0, current phase difference Ψ is less than warning value 90 degree, this moment the fault-signal output module 3 alert signal of not transmitting messages;
When the high-tension line fault outside shaft tower A and the shaft tower B, because local terminal measuring appliance 11 is identical with the direction of current of opposite end measuring appliance 12, therefore both measured current phase direction unanimities, this moment current phase difference Ψ=Ф A-Ф B ≈ 0, the alert signal of also can by mistake not transmitting messages;
When fault occurs between shaft tower A and the shaft tower B, the current phase of local terminal measuring appliance 11 and opposite end measuring appliance 12 is opposite owing to flow through, the current phase that this moment, both surveyed differs 180 degree, it is current phase difference Ψ=Ф A-Ф B=180 degree, current phase difference Ψ is greater than warning value 90 degree, trigger alerting signal this moment, failure analysis module 2 sends alerting signal to fault-signal output module 3, the mode of fault-signal output module by SMS sends to staff's mobile phone with information such as alerting signal, abort situation, finishes remote alarms.
Failure analysis module 2 sends the information that comprises failure message by wireless communication module to the external world when detecting failure message.Reduce the information traffic volume when not having fault at ordinary times, to save resource.Failure analysis module 2 is provided with a self-detection module, and self-detection module generates ego state information by detecting described failure analysis module duty, regularly sends the information that comprises self-duty to the external world by wireless communication module.So that external device is known the duty of each failure analysis module 2, so that when each failure analysis module 2 breaks down, in time overhaul.
The condition code that contains each failure analysis module 2 in the information that is sent in the ego state message sending function, so that the different failure analysis module 2 of external device identification, and each failure analysis module 2 of simultaneous verification sends the accuracy of information.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not subjected to the restriction of above-mentioned using method; that describes in above-mentioned using method and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. a supertension line fault detecting and positioning method is characterized in that: comprise the steps:
(1) respectively the two ends current phase information that is in the hi-line to be measured under the "on" position is sampled simultaneously, obtain current phase information and be respectively Ф 1, Ф 2;
(2) two current phase information are asked poor, obtain difference Ψ, i.e. Ψ=Ф 1-Ф 2;
(3) set a warning value about Ψ, when Ψ is higher than warning value, think described hi-line fault to be measured;
(4) after judging described hi-line fault to be measured, send failure message to the external world.
2. a kind of supertension line fault detecting and positioning method according to claim 1 is characterized in that, the warning value of Ψ is set at 90 degree.
3. a kind of supertension line fault detecting and positioning method according to claim 1 and 2 is characterized in that, in step (4), the mode that sends failure message to the external world is to send failure message by cell phone network.
4. a fault detect locating device comprises a failure analysis module and a fault-signal output module, it is characterized in that, described failure analysis module is provided with a fault detection module, described fault detection module comprises that one is used to be arranged on the local terminal measuring appliance of hi-line one end to be measured, described local terminal measuring appliance comprises a home terminal current phase sample module, and described home terminal current phase sample module inserts described hi-line to be measured one end;
Described fault detection module comprises that also one is used to be arranged on the opposite end measuring appliance of the hi-line other end to be measured, and described opposite end measuring appliance comprises pair of end current phase sampling module, and described opposite end current phase sampling module inserts the described hi-line other end to be measured;
Described local terminal measuring appliance and opposite end measuring appliance insert described failure analysis module respectively, described failure analysis module is according to described home terminal current phase sample module and described opposite end current phase sampling module, and the phase difference value size of the current phase information that the same time collects is respectively judged the failure condition of described hi-line to be measured;
Described failure analysis module connects described fault-signal output module, exports the failure condition of described hi-line to be measured to the external world.
5. fault detect locating device according to claim 4 is characterized in that, described home terminal current phase sample module and opposite end current phase sampling module are the device that described hi-line voltage-phase to be measured is sampled; Described local terminal voltage-phase sampling module and opposite end voltage-phase sampling module insert described hi-line to be measured by voltage transformer (VT) respectively.
6. fault detect locating device according to claim 4 is characterized in that, described home terminal current phase sample module and opposite end current phase sampling module are the device that described hi-line current phase to be measured is sampled; Described home terminal current phase sample module and opposite end current phase sampling module insert described hi-line to be measured by current transformer respectively.
7. fault detect locating device according to claim 4 is characterized in that, described fault-signal output module comprises a wireless signal sending module.
8. fault detect locating device according to claim 7, it is characterized in that, when described failure analysis module detects warning value Ψ and is higher than warning value, generate failure message, and sending described failure message to described wireless communication module, described wireless communication module sends the information that comprises failure message to the external world.
9. fault detect locating device according to claim 8, it is characterized in that, described failure analysis module is provided with a self-detection module, described self-detection module generates ego state information by detecting described failure analysis module duty, and regularly sends the information that comprises self-duty to the external world by described wireless communication module.
10. fault detect locating device according to claim 9, it is characterized in that, contain the condition code that each described failure analysis module is provided with in the information that described ego state information is sent in sending, so that the different described failure analysis module of external device identification, and each described failure analysis module of simultaneous verification sends the accuracy of information.
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Cited By (7)
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| CN103308770A (en) * | 2013-05-27 | 2013-09-18 | 李群生 | Network system for power supply line impedance loss type electrical failure fire hazard detector |
| CN104569729A (en) * | 2015-01-29 | 2015-04-29 | 深圳市科陆电子科技股份有限公司 | Fault indicator based power distribution network single-phase earth fault detection method and fault indicator based power distribution network single-phase earth fault detection system |
| CN105137290A (en) * | 2015-09-18 | 2015-12-09 | 国网上海市电力公司 | Method for rapidly determining position of grounding fault of overhead line |
| CN106427672A (en) * | 2016-09-30 | 2017-02-22 | 国网北京市电力公司 | Malfunction treating method and device for rail traffic |
| CN108173570A (en) * | 2017-12-25 | 2018-06-15 | 安徽博达通信工程监理有限责任公司 | A kind of wiring architecture fault detect communication system |
| CN110579689A (en) * | 2019-10-14 | 2019-12-17 | 清华四川能源互联网研究院 | Device and method for accurately positioning fault of high-voltage GIL equipment |
| CN113594962A (en) * | 2021-07-20 | 2021-11-02 | 李建华 | Intelligent identification method for high-altitude dangerous high-voltage line fault in mountainous area |
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Cited By (9)
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| CN103308770A (en) * | 2013-05-27 | 2013-09-18 | 李群生 | Network system for power supply line impedance loss type electrical failure fire hazard detector |
| CN104569729A (en) * | 2015-01-29 | 2015-04-29 | 深圳市科陆电子科技股份有限公司 | Fault indicator based power distribution network single-phase earth fault detection method and fault indicator based power distribution network single-phase earth fault detection system |
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| CN105137290B (en) * | 2015-09-18 | 2018-05-29 | 国网上海市电力公司 | A kind of method at quick definite overhead transmission line earth fault position |
| CN106427672A (en) * | 2016-09-30 | 2017-02-22 | 国网北京市电力公司 | Malfunction treating method and device for rail traffic |
| CN106427672B (en) * | 2016-09-30 | 2019-01-08 | 国网北京市电力公司 | Fault handling method and device for rail traffic |
| CN108173570A (en) * | 2017-12-25 | 2018-06-15 | 安徽博达通信工程监理有限责任公司 | A kind of wiring architecture fault detect communication system |
| CN110579689A (en) * | 2019-10-14 | 2019-12-17 | 清华四川能源互联网研究院 | Device and method for accurately positioning fault of high-voltage GIL equipment |
| CN113594962A (en) * | 2021-07-20 | 2021-11-02 | 李建华 | Intelligent identification method for high-altitude dangerous high-voltage line fault in mountainous area |
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