CN204989404U - Cable partial discharge on -line monitoring system - Google Patents
Cable partial discharge on -line monitoring system Download PDFInfo
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- CN204989404U CN204989404U CN201520736147.7U CN201520736147U CN204989404U CN 204989404 U CN204989404 U CN 204989404U CN 201520736147 U CN201520736147 U CN 201520736147U CN 204989404 U CN204989404 U CN 204989404U
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Abstract
The utility model relates to an electric power tech field discloses a cable partial discharge on -line monitoring system, include: partial discharge collector, power, host computer and have the high frequency pulse current sensor of luo shi loop construction, high frequency pulse current sensor is connected the partial discharge collector, the discharge pulse current signal transmission that will be coupled to in real time extremely the partial discharge collector, the transmission is extremely after with discharge pulse current signal analog -to -digital conversion for the partial discharge collector the host computer, the power is high frequency pulse current sensor and the power supply of partial discharge collector. The utility model discloses a cable partial discharge on -line monitoring system through having the luo shi loop construction high frequency pulse current sensor real time sensor high tension cable and join in marriage the partial discharge phenomenon that the cable joint department of netting the cable produced, realized the real -time supervision to partial discharge.
Description
Technical field
The utility model relates to technical field of electric power, refers to a kind of cable local discharge on-line monitoring system especially.
Background technology
The cable splice place of high-tension cable and distribution network cable can produce partial discharge phenomenon.Cable shelf depreciation occurs in one or more very little region, and the energy of electric discharge is very little, so its existence does not affect cable dielectric strength in short-term.But, if cable long-term existence under working voltage partial discharge phenomenon, even faint electric discharge, also can work the mischief by multi-thread cable, its destruction roughly has two kinds: one to be that point of discharge causes insulation local damage to insulation course for a long time, after progressively expanding, finally make insulation course puncture, cause line short to trip; Two be long-term electric discharge produce ozone, NO isoreactivity gas under the action of heat, minor insulation is corroded, and conductance increases, and finally causes thermal breakdown.The existing device to partial discharge monitoring is generally intermittent monitoring, within 5-15 minute, gather a secondary data, sudden or intermittent electric discharge is had no idea 100% to monitor, even if there is multiple sensor also can only realize the collection of multiple sensor poll, not synchronous acquisition, data be not the same moment gather, cannot horizontal comparison to get rid of noise jamming.
Utility model content
The utility model proposes a kind of cable local discharge on-line monitoring system, solving in prior art cannot the problem of Real-Time Monitoring shelf depreciation.
Cable local discharge on-line monitoring system of the present utility model, it is characterized in that, comprise: shelf depreciation collector, power supply, host computer and there is the high-frequency electrical pulses flow sensor of Luo-coil structure, described high-frequency electrical pulses flow sensor connects described shelf depreciation collector, by the discharge pulse current Signal transmissions extremely described shelf depreciation collector be coupled in real time, described shelf depreciation collector transfers to described host computer by after the number conversion of discharge pulse current signal mode, and described power supply is that high-frequency electrical pulses flow sensor drawn game portion electric discharge collector is powered.
Wherein, described high-frequency electrical pulses flow sensor comprises: the Al-alloy casing of three cavitys, Luo-coil coupling mechanism, signal conditioner and data acquisition unit, described Luo-coil coupling mechanism, signal conditioner and data acquisition unit lay respectively in a cavity, described Luo-coil coupling mechanism connection signal conditioner, described signal conditioner connects described data acquisition unit, and described data acquisition unit connects described shelf depreciation collector.
Wherein, described shelf depreciation collector comprises optical fiber joint end and three signals collecting ends, and described shelf depreciation collector is by host computer described in Fiber connection, and each described signals collecting end connects a described high-frequency electrical pulses flow sensor respectively.
Wherein, described shelf depreciation collector comprises wireless telecommunications system, GPS device and three signals collecting ends, described shelf depreciation collector is by host computer described in wireless connections, each described signals collecting end connects a described high-frequency electrical pulses flow sensor respectively, and time and address information are wirelessly transmitted to described host computer by described GPS device.
Wherein, described wireless telecommunications system is 3G signal transceiver.
Wherein, described high-frequency electrical pulses flow sensor connects described shelf depreciation collector by concentric cable.
Wherein, described power supply is solar cell or 220V power supply.
The partial discharge phenomenon that the cable splice place that cable local discharge on-line monitoring system of the present utility model responds to high-tension cable and distribution network cable in real time by the high-frequency electrical pulses flow sensor with Luo-coil structure produces, achieve the Real-Time Monitoring to shelf depreciation, thus avoid the harm that shelf depreciation brings.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of cable local discharge on-line monitoring system structural representation of the utility model embodiment;
Fig. 2 is the principle schematic of the on-line monitoring system of cable local discharge shown in Fig. 1 stube cable;
Fig. 3 is the signal of high-tension cable partial discharge monitoring system for field mounting structure;
Fig. 4 is the signal of distribution network cable partial discharge monitoring system for field mounting structure.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Cable local discharge on-line monitoring system of the present utility model, as shown in Figure 1, comprising: have the high-frequency electrical pulses flow sensor 100 of Luo-coil structure, shelf depreciation collector 200, power supply 300 and host computer 400.High-frequency electrical pulses flow sensor 100 connects described shelf depreciation collector 200, by the discharge pulse current Signal transmissions that is coupled in real time to shelf depreciation collector 200, shelf depreciation collector 200 transfers to host computer 400 by after the number conversion of discharge pulse current signal mode, and power supply 300 is powered for high-frequency electrical pulses flow sensor 100 and shelf depreciation collector 200.Wherein, high-frequency electrical pulses flow sensor 100 designs for clamp type structure, and shell adopts aluminum alloy materials, and appearance adopts oxide isolated PROCESS FOR TREATMENT, and interface is water joint.Utilize Luo-coil principle, the signal of 1M-30MHz frequency band can be responded in real time, realize the coupling to cable local discharge signal.This clamp type structure project organization is compact, removes and installs conveniently, does not need to have a power failure, can carry out long-term Real-Time Monitoring very easily to emphasis station, emphasis equipment, warping apparatus.
The high-frequency electrical pulses flow sensor 100 of the present embodiment comprises: the Al-alloy casing of three cavitys, Luo-coil coupling mechanism, signal conditioner and data acquisition unit, Luo-coil coupling mechanism, signal conditioner and data acquisition unit lay respectively in a cavity, Luo-coil coupling mechanism connection signal conditioner, signal conditioner connects described data acquisition unit, data acquisition unit connects shelf depreciation collector 200, for sending data to shelf depreciation collector 200.Achieve the integrative packaging of Luo-coil coupling mechanism, signal condition, data acquisition unit (high speed data acquisition system), this three Partial Height has been integrated in the Al-alloy casing of three cavitys.The good shielding properties of metal shell is achieved relative to existing sensor, achieve the most weakness reason of signal-transmitting cable between antenna coupler and data acquisition unit simultaneously, completely avoid the external interference signals introduced because of the antenna effect of signal-transmitting cable, the suppression for external interference signals reaches very outstanding degree.
As shown in Figure 2, cable comprises the insulation course 2 of core 1 and outer wrapping thereof.During work, high-frequency electrical pulses flow sensor 100 is arranged on the ground wire 4 of the cable splice 3 of cable, when cable splice 3 discharges, the pulsed current signal that high-frequency electrical pulses flow sensor 100 is coupled to is sent to shelf depreciation collector 200, and shelf depreciation collector 200 pairs of simulating signals become digital signal and are sent to host computer 400 by optical fiber again after amplification, filtering, analog to digital conversion.The signal of host computer 400 pairs of all the sensors carries out Classification and Identification analysis, calculating respectively, and is written in database by these by calculating the discharge information data obtained, and shows monitoring result simultaneously.
For high-tension cable, shelf depreciation collector 200 comprises optical fiber joint end and three signals collecting ends, and three signals collecting ends gather three lines of threephase cable respectively.Shelf depreciation collector 200 is by Fiber connection host computer 400, and each signals collecting end connects a high-frequency electrical pulses flow sensor 100 respectively.Host computer 400 utilizes optical fiber to realize precise synchronization, and undertaken synchronously by optical synchronous signal, synchronization accuracy can reach 30ns.And host computer 400 adopts both-end location survey method, can realize to high-tension cable body produce shelf depreciation locate in real time, under ideal conditions positioning precision can reach ± 3 meters.When adopting the data bus transmission pattern of pure optical fiber, synchronization accuracy is high, and system stability is reliable.
For distribution network cable, shelf depreciation collector 200 comprises wireless telecommunications system, GPS device (distribution network cable is layed in urban district usually, cannot set up data communication passage by laying optical fiber) and three signals collecting ends.Shelf depreciation collector 200 is by wireless connections host computer 400, each signals collecting end connects a high-frequency electrical pulses flow sensor 100 respectively, GPS device is by GPS sync identification, GPS provides synchronizing signal and time service information, to provide accurate triggered time and positional information to host computer 400, and by triggered time and positional information by being wirelessly transmitted to host computer 400, synchronization accuracy can reach 50ns.Wireless telecommunications system can be 3G signal transceiver or other wireless devices.When optical fiber cannot be laid, adopt 3G network to carry out data transmission, can the difficult wiring such as Optical Fiber Transmission be saved, reduce costs.
High-frequency electrical pulses flow sensor 100 connects shelf depreciation collector 200 by concentric cable.High-frequency electrical pulses flow sensor 100 adopts single digital bus to be connected shelf depreciation collector 200 with for electrical integrated polycore cable, there is minimized wiring quantity, greatly reduce the cabling quantity on GIS (Geographic Information System) and complexity.Wherein, power supply 300 is solar cell or 220V power supply.
As shown in Figure 3, for the signal of high-tension cable partial discharge monitoring system for field mounting structure, threephase cable comprises A, B and C tri-lines, three signals collecting ends of each shelf depreciation collector 200 connect three high-frequency electrical pulses flow sensor 100, and each high-frequency electrical pulses flow sensor 100 is arranged on the ground wire 4 (in Fig. 3, dotted line frame is cable splice place) of A, B and C respectively.220V power supply is powered for each shelf depreciation collector 200 by electric wire 5, each shelf depreciation collector 200 will be gathered by optical fiber 6 and information transmission after processing to host computer (not shown in Fig. 3).The signal of distribution network cable partial discharge monitoring system for field mounting structure is as shown in Figure 4, substantially identical with Fig. 3, difference be each shelf depreciation collector 200 wirelessly will gather and information transmission after processing to host computer.
The office of the present embodiment puts monitoring system and have employed the high-frequency electrical pulses flow sensor 100 with Luo-coil structure, and when system is in real-time mode, each high-frequency electrical pulses flow sensor 100 is in independent real-time office and puts monitoring state.And the data of maximum synchronous acquisition 200 high-frequency electrical pulses flow sensor, all high-frequency electrical pulses flow sensor can be realized and carry out time synchronized at synchronization.In this case, all high-frequency electrical pulses flow sensor 100 pairs of input signals carry out real-time continual continuous acquisition analysis, record maximum place value and the discharge phase of each power frequency period, thus the paradoxical discharge that can realize any instant produces realizes exhaustively 100% record, horizontal comparison can be carried out to get rid of noise jamming, thoroughly avoid monitoring dead angle.
No matter be high-tension cable or distribution network cable, its shelf depreciation collector 200 all can with the sampling rate of 100M, 12 bit resolutions, realize the discharge signal that three Channel Synchronous collection high-tension cable A, B, C three-phase sensor sensings arrive, and are real-time transmitted to host computer (industrial computer).
Cable local discharge on-line monitoring system of the present utility model is applicable to 10KV and above cable local discharge is online and off-line monitoring, each joint and each section of cable local discharge amplitude, the frequency can be shown in real time, determine point of discharge relative position, provide warning if desired.And can On-board test spectrogram, electric discharge trend, thus the insulation defect of Timeliness coverage cable and joint, for assessing its dielectric level and degree of aging provides criterion, for the service work of cable provides foundation.
Minimum measurement electric discharge amplitude: 2mV (on-the-spot 20PC) of this system, positioning error 3 meters, the frequency range of high-frequency electrical pulses flow sensor 100 is 1MHz ~ 30MHz, and the temporal resolution of discharge pulse is 10 μ s, and phase resolution is 0.18 °.The host computer of this system also provides power frequency period electric discharge figure, two dimension (q-φ, N-φ, N-q) spectrogram, electric discharge trend map etc.Host computer adopts analog filtering, pulse grouping, recurrent pulse to reject, arrange dynamic threshold, open the comprehensive interference protection measures such as phase window, makes test data true and reliable.
High-frequency electrical pulses flow sensor 100 adopts high-performance FPGA processor, realizes the high-speed sampling of 100Msps, 12Bit resolution, storage, and each analysis can more than continuous sampling 50 power frequency periods data.Location algorithm is put in the synchronous acquisition technology drawn game utilized, and can the office of location put the most serious cable splice.Band-pass filtering and noise identification and reject algorithm conjunctive use, effectively can identify Partial discharge signal.Based on the partial discharge monitoring technology of pulse current method (IEC60270 standard), more than 10pC Partial discharge signal can be detected.
" abnormal period number " statistical function that host computer also has, can the transient pulse impulsive disturbance that causes of exclusive PCR switching manipulation.The impact electromagnetic wave that switching manipulation produces generally only occurs 1-5 time at indivedual power frequency period, and this abnormal period is all more single, by adding up this abnormal period number, can differentiate switching manipulation or local discharge signal.Simultaneity factor has monitored the amplitude of pulse signal and the time of generation in each moment, can carry out corresponding examination with the switch events of transformer station inside.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. a cable local discharge on-line monitoring system, it is characterized in that, comprise: shelf depreciation collector, power supply, host computer and there is the high-frequency electrical pulses flow sensor of Luo-coil structure, described high-frequency electrical pulses flow sensor connects described shelf depreciation collector, by the discharge pulse current Signal transmissions extremely described shelf depreciation collector be coupled in real time, described shelf depreciation collector transfers to described host computer by after the number conversion of discharge pulse current signal mode, and described power supply is that high-frequency electrical pulses flow sensor drawn game portion electric discharge collector is powered.
2. cable local discharge on-line monitoring system as claimed in claim 1, it is characterized in that, described high-frequency electrical pulses flow sensor comprises: the Al-alloy casing of three cavitys, Luo-coil coupling mechanism, signal conditioner and data acquisition unit, described Luo-coil coupling mechanism, signal conditioner and data acquisition unit lay respectively in a cavity, described Luo-coil coupling mechanism connection signal conditioner, described signal conditioner connects described data acquisition unit, and described data acquisition unit connects described shelf depreciation collector.
3. cable local discharge on-line monitoring system as claimed in claim 1, it is characterized in that, described shelf depreciation collector comprises optical fiber joint end and three signals collecting ends, described shelf depreciation collector is by host computer described in Fiber connection, and each described signals collecting end connects a described high-frequency electrical pulses flow sensor respectively.
4. cable local discharge on-line monitoring system as claimed in claim 1, it is characterized in that, described shelf depreciation collector comprises wireless telecommunications system, GPS device and three signals collecting ends, described shelf depreciation collector is by host computer described in wireless connections, each described signals collecting end connects a described high-frequency electrical pulses flow sensor respectively, and time and address information are wirelessly transmitted to described host computer by described GPS device.
5. cable local discharge on-line monitoring system as claimed in claim 4, it is characterized in that, described wireless telecommunications system is 3G signal transceiver.
6. the cable local discharge on-line monitoring system according to any one of Claims 1 to 5, is characterized in that, described high-frequency electrical pulses flow sensor connects described shelf depreciation collector by concentric cable.
7. the cable local discharge on-line monitoring system according to any one of Claims 1 to 5, is characterized in that, described power supply is solar cell or 220V power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520736147.7U CN204989404U (en) | 2015-09-22 | 2015-09-22 | Cable partial discharge on -line monitoring system |
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| CN201520736147.7U CN204989404U (en) | 2015-09-22 | 2015-09-22 | Cable partial discharge on -line monitoring system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124950A (en) * | 2016-08-30 | 2016-11-16 | 合肥智博电气有限公司 | High voltage electric transmission cable on-line measuring device |
| CN106168646A (en) * | 2016-10-08 | 2016-11-30 | 浙江中新电力发展集团有限公司 | A kind of cable local discharge monitoring system |
| CN106353650A (en) * | 2016-09-23 | 2017-01-25 | 厦门矿通科技有限公司 | Power cable partial-discharge monitoring device and monitoring method thereof |
| CN106483434A (en) * | 2016-11-24 | 2017-03-08 | 南京朗坤自动化有限公司 | Power cable partial discharge monitoring device and its monitoring method |
| CN108318792A (en) * | 2018-04-17 | 2018-07-24 | 广东电网有限责任公司 | A kind of cable mid head partial discharge monitoring system |
| CN109557435A (en) * | 2018-12-06 | 2019-04-02 | 国网江苏省电力有限公司扬州供电分公司 | A kind of cable synchronizing partial discharge acquisition judgment method |
| CN109683068A (en) * | 2018-12-06 | 2019-04-26 | 国网江苏省电力有限公司扬州供电分公司 | A kind of cable synchronizing partial discharge testing system |
| CN110286304A (en) * | 2019-07-15 | 2019-09-27 | 哈尔滨理工大学 | A kind of ring network cabinet local discharge on-line monitoring device |
| CN110426616A (en) * | 2019-09-16 | 2019-11-08 | 国网上海市电力公司 | A kind of GIS partial discharge detection device and method based on flange plate bolt |
| CN110873734A (en) * | 2018-09-04 | 2020-03-10 | 中国石油化工股份有限公司 | Online positioning system and method for damaged point of pipeline anticorrosive coating |
| CN112881878A (en) * | 2021-04-01 | 2021-06-01 | 北京兴迪仪器有限责任公司 | Novel measurement system is put in on-line monitoring office |
| CN114545162A (en) * | 2022-02-15 | 2022-05-27 | 国网湖南省电力有限公司 | Distributed transmission line insulation performance online monitoring method |
-
2015
- 2015-09-22 CN CN201520736147.7U patent/CN204989404U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124950A (en) * | 2016-08-30 | 2016-11-16 | 合肥智博电气有限公司 | High voltage electric transmission cable on-line measuring device |
| CN106353650A (en) * | 2016-09-23 | 2017-01-25 | 厦门矿通科技有限公司 | Power cable partial-discharge monitoring device and monitoring method thereof |
| CN106168646A (en) * | 2016-10-08 | 2016-11-30 | 浙江中新电力发展集团有限公司 | A kind of cable local discharge monitoring system |
| CN106483434A (en) * | 2016-11-24 | 2017-03-08 | 南京朗坤自动化有限公司 | Power cable partial discharge monitoring device and its monitoring method |
| CN108318792A (en) * | 2018-04-17 | 2018-07-24 | 广东电网有限责任公司 | A kind of cable mid head partial discharge monitoring system |
| CN110873734A (en) * | 2018-09-04 | 2020-03-10 | 中国石油化工股份有限公司 | Online positioning system and method for damaged point of pipeline anticorrosive coating |
| CN109683068A (en) * | 2018-12-06 | 2019-04-26 | 国网江苏省电力有限公司扬州供电分公司 | A kind of cable synchronizing partial discharge testing system |
| CN109557435A (en) * | 2018-12-06 | 2019-04-02 | 国网江苏省电力有限公司扬州供电分公司 | A kind of cable synchronizing partial discharge acquisition judgment method |
| CN109683068B (en) * | 2018-12-06 | 2021-07-09 | 国网江苏省电力有限公司扬州供电分公司 | Cable synchronization partial discharge test system |
| CN110286304A (en) * | 2019-07-15 | 2019-09-27 | 哈尔滨理工大学 | A kind of ring network cabinet local discharge on-line monitoring device |
| CN110426616A (en) * | 2019-09-16 | 2019-11-08 | 国网上海市电力公司 | A kind of GIS partial discharge detection device and method based on flange plate bolt |
| CN112881878A (en) * | 2021-04-01 | 2021-06-01 | 北京兴迪仪器有限责任公司 | Novel measurement system is put in on-line monitoring office |
| CN114545162A (en) * | 2022-02-15 | 2022-05-27 | 国网湖南省电力有限公司 | Distributed transmission line insulation performance online monitoring method |
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Effective date of registration: 20160411 Address after: 400000 Chongqing city in northern new hi tech Zone High Tech Park Mount Huangshan Middle Road No. 66 Patentee after: Chongqing East Power Technology Co., Ltd. Address before: 400000 East electricity building, No. 66, Mount Huangshan Road, Chongqing, Yubei District Patentee before: Yuan Xiaohong |
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