CN204462307U - Based on the cable-transmission line fault section location system of synchronized sampling - Google Patents
Based on the cable-transmission line fault section location system of synchronized sampling Download PDFInfo
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- CN204462307U CN204462307U CN201520015654.1U CN201520015654U CN204462307U CN 204462307 U CN204462307 U CN 204462307U CN 201520015654 U CN201520015654 U CN 201520015654U CN 204462307 U CN204462307 U CN 204462307U
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Abstract
The utility model discloses a kind of cable-transmission line fault section location system based on synchronized sampling, comprise fault survey and patrol collector, itself and integrated data platform carry out exchanges data mutually; Described fault survey is patrolled collector and is also connected respectively with Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor; Described power current mutual inductor is arranged between Fisrt fault HF current transformer and the second fault HF current transformer; And induction electricity-getting mutual inductor, it is all arranged on the same phase circuit of three-phase line with Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor, and is connected with cable induction electricity getting device; And backup battery, it is the charging of cable induction electricity getting device, and cable induction electricity getting device is that fault is surveyed and patrolled collector and power.
Description
Technical field
The utility model relates to a kind of cable-transmission line fault section location system, especially relates to a kind of cable-transmission line fault section location system based on synchronized sampling.
Technical background
Along with the development in city, improving constantly of aerial cable rate, has built a large amount of pole lines-high-tension cable joint line.Joint line complex structure, possesses very high transmission reliability, and the overall image being conducive to city promotes.But be also faced with overhead transmission line thunderbolt simultaneously, air pollution insulation declines, icing, the challenge of the various faults unifications such as cable damage, cable are aging, joint is bad, puncture short.Wherein the overhead transmission line fault overwhelming majority is transient fault, and cable fault major part is the permanent fault because decreasing insulating after the flaw in manufacture or long-time running causes.In order to improve power supply reliability, generally automatic reclosing can be adopted for overhead transmission line fault, cut cable fault does not then allow to adopt automatic reclosing, if carry out reclosing operation power transmission to the cable line that there is fault, cable multiple spot insulation breakdown may be caused, fault coverage expands, cable is caused to scrap time serious, therefore for cable fault, reclosing operation power transmission can not be carried out easily, first to carry out failure cause to service cable circuit to search, after nature of trouble inspection confirms, take appropriate measures and process, after failture evacuation, carry out combined floodgate power transmission again.
Drop into reclosing under wanting to meet the precondition of device security and reliability after some transient fault occurs, just must can orient fault occurs in built on stilts section or underground high voltage cable section, thus shortens the fault outage time, reduces economic loss; Therefore be necessary to research and develop a kind of can to the method for mixed line fault section location, thus to provide the necessary technical means and quantum condition for electrical production decision making package.Domestic and international location mixed line fault section also conducts in-depth research at present,
The patent " Type B overhead lines combined with cable traveling wave fault positioning method " of the patent No. to be the patent " A type frame ceases to be busy-cable hybrid line traveling wave fault positioning method " of CN101762775A and the patent No. be CN101930048A, traveling wave method is adopted to position fault, adopt Two-terminal Fault Location, shortcoming is that the monitoring equipment clock synchronous at cable-aerial line two ends is more difficult, and clocking error was less than for tens nanoseconds.
The method of current mixed line fault section adopts single-ended method and both-end method mostly, is to calculate to be directly proportional to distance the time of arrival of reflection wave bow wave to draw position of failure point.Traveling wave method is less by line influence, and distance accuracy is relatively high; But require very high to the synchronous of split-second precision and high speed signal sampling etc., especially the synchronous requirement of both-end method to the time is higher, the method costs such as the synchronous and optical fiber of current GPS is synchronous are high, be subject to external force of environment interference, backoff algorithm is complicated, causes localization of fault precision to have a greatly reduced quality.
Utility model content
The utility model is in order to solve the problem, provide a kind of cable-transmission line fault section location system based on synchronized sampling, when cable-transmission line breaks down, adopt single-phase self synchronization theory, realize the fault section of joint line, exclusive PCR, the direction of accurate localizing faults, faulty line, and fault type.
To achieve these goals, the utility model adopts following technical scheme:
Based on a cable-transmission line fault section location system for synchronized sampling, comprise integrated data platform; And
Fault is surveyed and is patrolled collector, and itself and integrated data platform carry out exchanges data mutually;
Described fault survey is patrolled collector and is also connected respectively with Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor; Described Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor are all arranged on the same phase circuit of three-phase line; And
Power module, it patrols collector for fault survey and powers.
Described fault is surveyed and is patrolled the data that collector gathered by antenna modules and be sent to integrated data platform by wireless network, surveys and patrols the data that collector uploads and store, analyze and displaying in integrated data platform to fault.
Described power current mutual inductor is arranged between Fisrt fault HF current transformer and the second fault HF current transformer.
Described power module, comprising: cable induction electricity getting device; And induction electricity-getting mutual inductor, it is all arranged on the same phase circuit of three-phase line with Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor, and is connected with cable induction electricity getting device; And backup battery, it is the charging of cable induction electricity getting device, and cable induction electricity getting device is that fault is surveyed and patrolled collector and power.
Described fault survey is patrolled collector and is arranged at cable-aerial line loop on the circuit of terminal tower side.
Described Fisrt fault HF current transformer and the second fault HF current transformer all adopt flexible Luo-coil, are used for monitoring fault traveling wave current spread direction and velocity of propagation, and propagate initial direction.
Described power current mutual inductor is made according to electromagnetic principle, and its winding is power cable loop phase line, and secondary side is by the class of accuracy coiling by rated transformation ratio, nominal load and requirement of magnetive cord and enameled wire.
Described fault survey is patrolled collector and is included high speed processor, and it is connected with hyperchannel high bandwidth and high speed A/D change-over circuit respectively with triggering catching circuits; And compensated attenuator network, the signal of its receiving sensor, and the input end exporting hyperchannel high bandwidth and high speed A/D change-over circuit after carrying out compensate for attenuation to; The output terminal of described hyperchannel high bandwidth and high speed A/D change-over circuit connects mutual inductor interface circuit, and mutual inductor interface circuit is sent to high speed processor after current signal is converted to voltage signal;
Described high speed processor is also communicated with radio modem by a communication interface; Described mutual inductor interface circuit is made up of impedance matching resistor and gas-discharge tube and TVS diode; Fault is surveyed and is patrolled collector and complete the sampling seizure of power cable fault traveling wave signal and phase signal, filtering process, analyses and comparison, the function that arranges and configure with platform radio communication, data upload and instruction.
The beneficial effects of the utility model are:
By enforcement of the present utility model, when cable-transmission line breaks down, adopt single-phase self synchronization theory, realize the fault section of joint line, exclusive PCR, the direction of accurate localizing faults, faulty line, and fault type.
Accompanying drawing explanation
Fig. 1 is the utility model system composition schematic diagram;
Fig. 2 is that collector composition logic diagram is patrolled in fault survey.
Wherein: 1, fault is surveyed and patrolled collector; 2, integrated data platform; 3, antenna modules; 4, backup battery; 5, cable induction electricity getting device; 6, Fisrt fault HF current transformer; 7, the second fault HF current transformer; 8, operating frequency phase mutual inductor; 9, electricity-getting mutual inductor is responded to; 11, high speed processor, 12, hyperchannel high bandwidth and high speed A/D change-over circuit, 13, mutual inductor interface circuit, 14, compensated attenuator network, 15, trigger catching circuits, 16, communication interface, 17, radio modem.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Below for A phase circuit:
As shown in Figure 1, a kind of cable-transmission line fault section location system based on synchronized sampling, comprise: on the A phase circuit of terminal tower side, be provided with a fault survey at cable-aerial line loop and patrol collector 1, on the A phase circuit of pole line three-phase line, s=50 ~ 100, interval meter arrange two sampled points, these two sampled points adopt Fisrt fault HF current transformer 6 and the second fault HF current transformer 7 to be coupled respectively, Fisrt fault HF current transformer 6 and the second fault HF current transformer 7 are all surveyed with fault and are patrolled collector 1 and be connected, realize the monitoring to the fault traveling wave direction of propagation and velocity of propagation, the sampled point first monitoring fault traveling wave electric current is the direction, initial source of fault current.Wherein, a fault survey is patrolled collector 1 and is connected with two fault current transformer simultaneously, overcomes the shortcoming that traditional data acquisition is synchronously difficult and synchronous error is large, achieves phase synchronization sampling, in conjunction with velocity of propagation, fault current or interference can be judged accurately.
Between two sampled points set on the A phase circuit of pole line three-phase line, select a sampled point again, be coupled with operating frequency phase mutual inductor 8 and sample, operating frequency phase mutual inductor 8 is also connected to fault survey and patrols collector 1, by operating frequency phase mutual inductor 8 Real-time Collection phase data, when collecting fault traveling wave, determine the phase place that transient fault occurs on the one hand, judge short trouble on the other hand, by judging the phase relation determination fault type of zero sequence, positive sequence, negative phase-sequence, as phase fault and one-phase short-circuit current fault; And by sampling failed row direction of wave travel and velocity of propagation, combined circuit topology can judge the position that fault occurs, such as in pole line or cable side.
Wherein, suppose that travelling wave signal velocity of propagation is in the cable v=170m/ μ s, when fault occurs, fault traveling wave can with this speed successively by two sampled points on A phase circuit, the time that two sampled points monitor fault wave head is separated by T=s/v=300 ~ 600ns, by the calculating of above time, in conjunction with the time point that two HF current transformer are signal collected, fault traveling wave electric current or undesired signal can be judged.In conjunction with the sampling number certificate first monitored, fault occurs in the sampled point side first monitoring wavefront, can judge the direction of travelling wave current.Simultaneously in conjunction with the data that operating frequency phase mutual inductor gathers, can analysis of failure type.
Integrated data platform 2 and fault are surveyed to patrol between collector 1 and are carried out exchanges data by antenna modules 3, and fault is surveyed the data of patrolling collector 1 and is sent to integrated data platform 2 by GPRS/3G wireless network by antenna modules 3.Wherein, the integrated data platform 2 pairs of faults are surveyed and are patrolled the data that collector 1 uploads and store, and analyze and show.
The A phase circuit of pole line three-phase line is also provided with three induction electricity-getting mutual inductors, and induction electricity-getting mutual inductor 9 is coupled with cable induction electricity getting device 5; Backup battery 4 is powered for cable induction electricity getting device 5, and cable induction electricity getting device 5, induction electricity-getting mutual inductor 9 and backup battery 4 three consist of fault and survey the power supply patrolling collector 1 and power, thus the stability of safeguards system work and continuity and reliability.
High frequency fault current sensor adopts flexible Luo-coil, the coupling pick device of fault-signal when fault occurs, and has that volume is little, unsaturated, bandwidth, frequency response are fast, installs and easy to maintenance, the advantage such as do not have second open circuit dangerous.
Operating frequency phase mutual inductor 9 is made according to electromagnetic principle, and a winding is power cable loop phase line, and secondary side is by the class of accuracy coiling by rated transformation ratio, nominal load and requirement of magnetive cord and enameled wire.
For cable-transmission line, on the three-phase of terminal tower side, install a fault survey respectively at pole line and patrol collector, each fault survey is patrolled collector and is connected with two high frequency fault current mutual inductors and an operating frequency phase mutual inductor respectively.
As shown in Figure 2, fault survey is patrolled collector 1 and is included high speed processor 11, and it is connected respectively with triggering catching circuits 15 and hyperchannel high bandwidth and high speed A/D change-over circuit 12; Wherein, trigger catching circuits 15 and adopt LINEAR company high speed voltage comparator, produce trigger pulse when fault traveling wave signal exceedes setting threshold value, notice high speed processor carries out data acquisition; And
Compensated attenuator network 13, the signal of its receiving sensor, and carry out compensate for attenuation, signal amplitude is limited in A/D change-over circuit input range, then exports the input end of hyperchannel high bandwidth and high speed A/D change-over circuit 12 to;
Hyperchannel high bandwidth and high speed A/D change-over circuit 12, adopt 4 ADI dual channel high speed A/D conversion chips, sampling rate 65MHz, responsible failed row involves the analog to digital conversion of operating frequency phase signal, and its output signal transfers in mutual inductor interface circuit 14;
Mutual inductor interface circuit 14, mutual inductor interface circuit is made up of impedance matching resistor and gas-discharge tube and TVS diode, current signal is converted to voltage signal, and prevent lightning surge from damaging late-class circuit, last mutual inductor interface circuit 14 exports signal to high speed processor 11 simultaneously;
High speed processor 11, high speed processor adopts TI high-speed dsp processor, be responsible for fault traveling wave signal to control with the AD gatherer process of operating frequency phase signal, collection result analyzed, and image data and analysis result are uploaded to integrated data platform by radio modem 17;
Wherein, the responsible level match between the two of communication interface 16 is passed through between high speed processor and radio modem; Described radio modem 17 adopts Siemens's technical grade wireless module, is responsible for the remote data transmission between inspection of fault collector and integrated data platform.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (10)
1., based on a cable-transmission line fault section location system for synchronized sampling, it is characterized in that, comprise integrated data platform; And
Fault is surveyed and is patrolled collector, and itself and integrated data platform carry out exchanges data mutually;
Described fault survey is patrolled collector and is also connected respectively with Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor; Described Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor are all arranged on the same phase circuit of three-phase line; And
Power module, it patrols collector for fault survey and powers.
2. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 1, it is characterized in that, described fault is surveyed and is patrolled the data that collector gathered by antenna modules and be sent to integrated data platform by wireless network.
3. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 1, it is characterized in that, described power current mutual inductor is arranged between Fisrt fault HF current transformer and the second fault HF current transformer.
4. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 1, it is characterized in that, described power module, comprising:
Cable induction electricity getting device; And
Induction electricity-getting mutual inductor, it is all arranged on the same phase circuit of three-phase line with Fisrt fault HF current transformer, the second fault HF current transformer and power current mutual inductor, and is connected with cable induction electricity getting device; And
Backup battery, it is the charging of cable induction electricity getting device, and cable induction electricity getting device is that fault is surveyed and patrolled collector and power.
5. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 1, is characterized in that, described fault is surveyed and patrolled collector and be arranged at cable-aerial line loop on the circuit of terminal tower side.
6. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 1, it is characterized in that, described Fisrt fault HF current transformer and the second fault HF current transformer all adopt flexible Luo-coil.
7. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 1, it is characterized in that, described power current mutual inductor is made according to electromagnetic principle, its winding is power cable loop phase line, and secondary side is by the class of accuracy coiling by rated transformation ratio, nominal load and requirement of magnetive cord and enameled wire.
8. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 1, it is characterized in that, described fault survey is patrolled collector and is comprised high speed processor, and it is connected respectively with triggering catching circuits and hyperchannel high bandwidth and high speed A/D change-over circuit; And
Compensated attenuator network, the signal of its receiving sensor, and the input end exporting hyperchannel high bandwidth and high speed A/D change-over circuit after carrying out compensate for attenuation to; The output terminal of described hyperchannel high bandwidth and high speed A/D change-over circuit connects mutual inductor interface circuit, and mutual inductor interface circuit is sent to high speed processor after current signal is converted to voltage signal.
9. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 8, it is characterized in that, described high speed processor is also communicated with radio modem by a communication interface.
10. a kind of cable-transmission line fault section location system based on synchronized sampling as claimed in claim 8, is characterized in that, described mutual inductor interface circuit is made up of impedance matching resistor and gas-discharge tube and TVS diode.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405323A (en) * | 2016-08-19 | 2017-02-15 | 山东康威通信技术股份有限公司 | Single port measurement calibration model based cable sweep frequency positioning analyzing system and method |
| CN106771877A (en) * | 2017-01-11 | 2017-05-31 | 北京衡天北斗科技有限公司 | The determination method and apparatus of the position of failure point of system with non effectively earth ed neutral |
| CN110031724A (en) * | 2019-04-30 | 2019-07-19 | 广州供电局有限公司 | Distribution cable medial head monitoring device |
| CN110441649A (en) * | 2019-06-27 | 2019-11-12 | 国网福建省电力有限公司福州供电公司 | One kind is aerial-cable hybrid line fault fast positioning dress and localization method |
-
2015
- 2015-01-09 CN CN201520015654.1U patent/CN204462307U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405323A (en) * | 2016-08-19 | 2017-02-15 | 山东康威通信技术股份有限公司 | Single port measurement calibration model based cable sweep frequency positioning analyzing system and method |
| CN106771877A (en) * | 2017-01-11 | 2017-05-31 | 北京衡天北斗科技有限公司 | The determination method and apparatus of the position of failure point of system with non effectively earth ed neutral |
| CN106771877B (en) * | 2017-01-11 | 2019-05-21 | 北京衡天北斗科技有限公司 | The determination method and apparatus of the position of failure point of system with non effectively earth ed neutral |
| CN110031724A (en) * | 2019-04-30 | 2019-07-19 | 广州供电局有限公司 | Distribution cable medial head monitoring device |
| CN110031724B (en) * | 2019-04-30 | 2024-04-30 | 广东电网有限责任公司广州供电局 | Distribution cable middle head monitoring device |
| CN110441649A (en) * | 2019-06-27 | 2019-11-12 | 国网福建省电力有限公司福州供电公司 | One kind is aerial-cable hybrid line fault fast positioning dress and localization method |
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Address after: 250101 A203, block F, entrepreneurship square, Qilu Software Park, No.1 Shunhua Road, high tech Development Zone, Jinan City, Shandong Province Patentee after: Conway Communication Technology Co., Ltd Address before: 250101 Qilu Software Park, No. 1 Shunhua Road, Jinan High-tech Development Zone, Shandong Province, A 203 Patentee before: SHANDONG KANGWEI COMMUNICATION TECHNOLOGY Co.,Ltd. |