CN103399265B - A kind of high voltage cable terminal partial discharge ultrasonic monitor - Google Patents
A kind of high voltage cable terminal partial discharge ultrasonic monitor Download PDFInfo
- Publication number
- CN103399265B CN103399265B CN201310351179.0A CN201310351179A CN103399265B CN 103399265 B CN103399265 B CN 103399265B CN 201310351179 A CN201310351179 A CN 201310351179A CN 103399265 B CN103399265 B CN 103399265B
- Authority
- CN
- China
- Prior art keywords
- partial discharge
- phase
- discharge signal
- current
- processing device
- 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.)
- Active
Links
- 238000012545 processing Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims description 20
- 238000004146 energy storage Methods 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Abstract
A kind of high voltage cable terminal partial discharge ultrasonic monitor.Sensor, Partial discharge signal acquisition processing device and power supply are put in it office of comprising; Office puts sensor and is made up of ultrasonic sensor, and three offices put sensor and are connected with three signals collecting input ends of Partial discharge signal collector respectively; Power supply is connected with Partial discharge signal acquisition processing device.Apparatus of the present invention have the following advantages: 1, structure is simple, and volume is little, and easily realization, human users are conveniently; 2, achieve the isolation electrically with system, ensure that the safety of equipment; 3, this device can not destroy cable body, installs and does not need cable line to have a power failure; 4, do not disturb by on-the-spot electromagnetic environment, strong adaptability, can be widely used; 5, highly sensitive, the electric discharge of minimum 10pC can be found, achieve the accurate measurement that cable termination office is put.
Description
Technical field
The invention belongs to high-tension electricity T & D Technology field, particularly relate to a kind of high voltage cable terminal partial discharge ultrasonic monitor.
Background technology
In recent years, power cable is widely used in urban distribution network, and the thing followed is being on the increase of cable fault.Cable termination is as the vitals of cable, and because insulation system is complicated, the reason affecting its insulating property is numerous, and usual manual manufacture at the scene, and bad technique easily leaves over potential faults, so failure rate is far away higher than cable body.Therefore, the safe and stable operation of assessment to cable of cable terminal insulation state has very important practical significance.Shelf depreciation, as the omen of insulation degradation and main cause, is extensively approved by domestic and international numerous scholars.At present, the detection method of cable local discharge mainly contains capacitive couplings, inductive coupling method, direction coupled method based on pulse current, based on the ultrasonic method of type local-discharge ultrasonic ripple signal, the ultrahigh frequency method of ultra-high frequency signal and the optical method based on light signal is put based on office, and capacitive couplings, inductive coupling method and ultrasonic method have good operating experience, direction coupled method, ultrahigh frequency method and optical method correlative study and operating experience less, on-line monitoring cannot be carried out to high-tension cable at present.Capacitive couplings is divided into built-in capacitance coupled method and external capacitive couplings, sensor is arranged on cable semi-conductive layer by built-in capacitance coupled method usually, this method detection sensitivity is high, be not vulnerable to extraneous electromagnetic interference (EMI), but need the original structure destroying cable, and install very inconvenient, be a huge hidden danger to the safe and stable operation of cable; External capacitive couplings is the jacket outer surface directly metal electrode being attached at cable or joint, though easy for installation, be vulnerable to the impact of periphery electromagnetic environment, the Signal-to-Noise of acquisition is lower, and needs power failure to carry out system testing in some cases.The sensor of inductive coupling method generally makes clamp, and size is large, easy for installation, do not affect, but sensitivity is lower on cable body, is subject to spatial electromagnetic interference, measures inaccurate.Supercritical ultrasonics technology is one of the technology of comparatively early application success under condition at the scene, in cable, the acoustical signal frequency band that excites is put between 20kHz-10MHz in office, generally can adopt the Partial discharge signal in the acoustical signal processing cable of 20kHz ~ 300kHz, the frequency band gathering the piezoelectric crystal of ultrasonic signal can cover this frequency band substantially.Although ultrasonic signal transmission attenuation in different medium is larger, but the armouring of transformer, GIS shell and cable termination has good connection, signal is decayed hardly, and being arranged on by sonac on transformer or GIS shell can the shelf depreciation situation of monitoring cable terminal effectively.Ultrasonic method can not destroy the structure of cable, and installs very convenient, affects less by external electromagnetic noise, is more satisfactory field monitoring method.
Domestic on-line monitoring of cable technical research is started late, so far still among development.At present, detection and the monitoring means of the domestic cable to XLPE power cable especially 110kV and above are also very backward, lack effective monitoring means.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of high voltage cable terminal partial discharge ultrasonic monitor.
In order to achieve the above object, sensor, Partial discharge signal acquisition processing device and power supply are put in the high voltage cable terminal partial discharge ultrasonic monitor office of comprising provided by the invention; Wherein: it is local discharge signal sensor that sensor is put in office, and it is made up of ultrasonic sensor, the surface that sensor is arranged on cable termination is respectively put in three offices, and is connected with three signals collecting input ends of Partial discharge signal acquisition processing device respectively;
Partial discharge signal acquisition processing device is local discharge signal acquisition process and display module, it puts by office the local discharge signal that sensor gathers three-phase electrical cable, then digital signal is converted thereof into, and process accordingly, the last result according to obtaining carries out showing or output alarm signal;
Power supply is the working power of Partial discharge signal acquisition processing device, and it is connected with Partial discharge signal acquisition processing device.
Described Partial discharge signal acquisition processing device comprises: Partial discharge signal amplifier, hardware filter, Partial discharge signal collector, Partial discharge signal processor and display and alarm, wherein: Partial discharge signal amplifier is made up of three-pass DINSAR amplifying circuit, for amplifying the input signal that sensor is put in three offices respectively, its three input ends are put sensor with three offices respectively and are connected, and three output terminals are connected with three input ends of hardware filter respectively;
Hardware filter is made up of No. three filtering circuits, carries out shaping filter for putting input signal to three road bureaus, and its three output terminals are connected with three input ends of sampling of Partial discharge signal collector respectively;
Partial discharge signal collector is triple channel analog to digital converter, and convert digital signal to for simulating signal is put in three road bureaus, its output terminal is connected with Partial discharge signal processor;
Partial discharge signal processor is digital signal processor, its output terminal is connected with display and alarm, digital signal is put for reading office from Partial discharge signal collector, and subsequent treatment and calculating are carried out to it, thus according to the type of Partial discharge signal identification shelf depreciation, and determine the amplitude of Partial discharge signal, then the information obtained is sent to display and alarm;
Display and alarm for showing the relevant information of Partial discharge signal, and carry out Realtime Alerts according to the warning value of setting.
Described power supply is USP feed circuit, and it comprises: A, B, C phase current mutual inductor, rectified three-phase circuit, mu balanced circuit, charge-discharge control circuit and accumulator; Wherein: A, B, C phase current mutual inductor is three current transformers be arranged on three-phase electrical cable, its three tunnel exports and is connected with the three-phase input circuit of rectified three-phase circuit respectively, when the load current of three-phase electrical cable is within operation of current transformers scope, A, B, C phase current mutual inductor obtains electric current from three-phase load side, and is flowed to rectified three-phase circuit;
Rectified three-phase circuit is used for exporting the three-phase of A, B, C phase current mutual inductor carrying out rectification, and its DC output end is connected with the input end of mu balanced circuit;
Mu balanced circuit is direct current stabilizer, and its output terminal is connected with the input end of charge-discharge control circuit, carries out voltage stabilizing for the direct current exported rectified three-phase circuit;
Charge-discharge control circuit is connected with accumulator, is connected by power supply output terminal with Partial discharge signal acquisition processing device simultaneously; Charge-discharge control circuit is used for controlling according to the discharge and recharge of load current to accumulator of three-phase electrical cable, namely when load current is within operation of current transformers scope, current transformer obtains electric current from load side, this electric current supplies Partial discharge signal acquisition processing device after rectifying and voltage-stabilizing, and is charge in batteries simultaneously; When the working range of load current lower than current transformer, be that Partial discharge signal acquisition processing device is powered by accumulator;
Accumulator is energy-storage battery, for storage of electrical energy, and exports electric energy when needs.
High voltage cable terminal partial discharge ultrasonic monitor provided by the invention adopts the sonac that gain is large, bandwidth, the linearity are good, highly sensitive, and devise corresponding signal amplification circuit and filtering circuit, type local-discharge ultrasonic signal remaining processing sequences is developed by ARM, can the shelf depreciation of monitoring cable terminal effectively, and Timeliness coverage insulation defect real-time follow-up, and achieve the Partial discharge signal electric discharge display of amplitude and the issue of warning message.Meanwhile, utilize UPS in load side power taking, finally achieve the partial discharge monitoring to cable termination.
Apparatus of the present invention have the following advantages:
1, structure is simple, and volume is little, and easily realization, human users are conveniently;
2, achieve the isolation electrically with system, ensure that the safety of equipment;
3, this device can not destroy cable body, installs and does not need cable line to have a power failure;
4, do not disturb by on-the-spot electromagnetic environment, strong adaptability, can be widely used;
5, highly sensitive, the electric discharge of minimum 10pC can be found, achieve the accurate measurement that cable termination office is put.
Accompanying drawing explanation
Fig. 1 is high voltage cable terminal partial discharge ultrasonic monitor provided by the invention composition schematic diagram.
Fig. 2 is Partial discharge signal acquisition processing device composition frame chart in high voltage cable terminal partial discharge ultrasonic monitor provided by the invention.
Fig. 3 is power supply composition frame chart in high voltage cable terminal partial discharge ultrasonic monitor provided by the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, high voltage cable terminal partial discharge ultrasonic monitor provided by the invention is described in detail.
As shown in Figure 1, high voltage cable terminal partial discharge ultrasonic monitor provided by the invention comprises: sensor 1, Partial discharge signal acquisition processing device 2 and power supply 3 are put in office; Wherein: sensor 1 is put for local discharge signal sensor in office, and it is made up of ultrasonic sensor, and the surface that sensor 1 is arranged on cable termination is respectively put in three offices, and is connected with three signals collecting input ends of Partial discharge signal acquisition processing device 2 respectively;
Partial discharge signal acquisition processing device 2 is local discharge signal acquisition process and display module, it puts by office the local discharge signal that sensor 1 gathers three-phase electrical cable, then digital signal is converted thereof into, and process accordingly, the last result according to obtaining carries out showing or output alarm signal;
Power supply 3 is the working power of Partial discharge signal acquisition processing device 2, and it is connected with Partial discharge signal acquisition processing device 2.
As shown in Figure 2, described Partial discharge signal acquisition processing device 2 comprises: Partial discharge signal amplifier 21, hardware filter 22, Partial discharge signal collector 23, Partial discharge signal processor 24 and display and alarm 25, wherein: Partial discharge signal amplifier 21 is made up of three-pass DINSAR amplifying circuit, for amplifying the input signal that sensor 1 is put in three offices respectively, its three input ends are put sensor 1 with three offices respectively and are connected, and three output terminals are connected with three input ends of hardware filter 22 respectively;
Hardware filter 22 is made up of No. three filtering circuits, carries out shaping filter for putting input signal to three road bureaus, and its three output terminals are connected with three input ends of sampling of Partial discharge signal collector 23 respectively;
Partial discharge signal collector 23 is triple channel analog to digital converter, and convert digital signal to for simulating signal is put in three road bureaus, its output terminal is connected with Partial discharge signal processor 24;
Partial discharge signal processor 24 is digital signal processor, its output terminal is connected with display and alarm 25, digital signal is put for reading office from Partial discharge signal collector 23, and subsequent treatment and calculating are carried out to it, thus according to the type of Partial discharge signal identification shelf depreciation, and determine the amplitude of Partial discharge signal, then the information obtained is sent to display and alarm 25;
Display and alarm 25 for showing the relevant information of Partial discharge signal, and carry out Realtime Alerts according to the warning value of setting.
Described Partial discharge signal collector 23 and the function of Partial discharge signal processor 24 can have been come by high-performance ARM microcontroller chip.
As shown in Figure 3, described power supply 3 is USP feed circuit, and it comprises: A, B, C phase current mutual inductor 31, rectified three-phase circuit 32, mu balanced circuit 33, charge-discharge control circuit 34 and accumulator 35; Wherein: A, B, C phase current mutual inductor 31 is for being arranged on three current transformers on three-phase electrical cable, its three tunnel exports and is connected with the three-phase input circuit of rectified three-phase circuit 32 respectively, when the load current of three-phase electrical cable is within operation of current transformers scope, A, B, C phase current mutual inductor 31 can obtain electric current from three-phase load side, and is flowed to rectified three-phase circuit 32;
Rectified three-phase circuit 32 carries out rectification for exporting the three-phase of A, B, C phase current mutual inductor 31, and its DC output end is connected with the input end of mu balanced circuit 33;
Mu balanced circuit 33 is direct current stabilizer, and its output terminal is connected with the input end of charge-discharge control circuit 34, carries out voltage stabilizing for the direct current exported rectified three-phase circuit 32;
Charge-discharge control circuit 34 is connected with accumulator 35, is connected by power supply output terminal with Partial discharge signal acquisition processing device 2 simultaneously; Charge-discharge control circuit 34 controls for the discharge and recharge of load current to accumulator 35 according to three-phase electrical cable, namely when load current is within operation of current transformers scope, current transformer obtains electric current from load side, this electric current supplies Partial discharge signal acquisition processing device 2 after rectifying and voltage-stabilizing, and charges for accumulator 35 simultaneously; When the working range of load current lower than current transformer, powered for Partial discharge signal acquisition processing device 2 by accumulator 35;
Accumulator 35 is energy-storage battery, for storage of electrical energy, and exports electric energy when needs.
The principle of work of high voltage cable terminal partial discharge ultrasonic monitor provided by the invention is as follows: when cable termination generation shelf depreciation, ultrasound wave can be given off, the acoustic-electric transducing function that sensor 1 is put in utilization office can realize collection to ultrasonic signal and acoustic-electric conversion, and the ultrasound partial discharge signal of millivolt level is obtained by differential amplifier circuit, carry out analog to digital conversion again after this signal being carried out filter shape, obtain corresponding office and put digital signal; Then played a game by digital processing unit and put digital signal and carry out discriminance analysis and computing, thus determine type and the intensity of shelf depreciation, to be further processed, the insulation defect of Timeliness coverage cable termination, and realize real-time follow-up.
Claims (1)
1. a high voltage cable terminal partial discharge ultrasonic monitor, sensor (1), Partial discharge signal acquisition processing device (2) and power supply (3) are put in the described high voltage cable terminal partial discharge ultrasonic monitor office of comprising; Wherein: sensor (1) is put for local discharge signal sensor in office, it is made up of ultrasonic sensor, the surface that sensor (1) is arranged on cable termination is respectively put in three offices, and is connected with three signals collecting input ends of Partial discharge signal acquisition processing device (2) respectively;
Partial discharge signal acquisition processing device (2) is local discharge signal acquisition process and display module, it puts by office the local discharge signal that sensor (1) gathers three-phase electrical cable, then digital signal is converted thereof into, and process accordingly, the last result according to obtaining carries out showing or output alarm signal;
The working power that power supply (3) is Partial discharge signal acquisition processing device (2), it is connected with Partial discharge signal acquisition processing device (2);
It is characterized in that: described power supply (3) is USP feed circuit, and it comprises: A, B, C phase current mutual inductor (31), rectified three-phase circuit (32), mu balanced circuit (33), charge-discharge control circuit (34) and accumulator (35); Wherein: A, B, C phase current mutual inductor (31) is for being arranged on three current transformers on three-phase electrical cable, its three tunnel exports and is connected with the three-phase input circuit of rectified three-phase circuit (32) respectively, when the load current of three-phase electrical cable is within operation of current transformers scope, A, B, C phase current mutual inductor (31) obtains electric current from three-phase load side, and is flowed to rectified three-phase circuit (32);
Rectified three-phase circuit (32) carries out rectification for exporting the three-phase of A, B, C phase current mutual inductor (31), and its DC output end is connected with the input end of mu balanced circuit (33);
Mu balanced circuit (33) is direct current stabilizer, and its output terminal is connected with the input end of charge-discharge control circuit (34), carries out voltage stabilizing for the direct current exported rectified three-phase circuit (32);
Charge-discharge control circuit (34) is connected with accumulator (35), is connected by power supply output terminal with Partial discharge signal acquisition processing device (2) simultaneously; Charge-discharge control circuit (34) controls for the discharge and recharge of load current to accumulator (35) according to three-phase electrical cable, namely when load current is within operation of current transformers scope, current transformer obtains electric current from load side, this electric current supplies Partial discharge signal acquisition processing device (2) after rectifying and voltage-stabilizing, and is accumulator (35) charging simultaneously; When the working range of load current lower than current transformer, be that Partial discharge signal acquisition processing device (2) is powered by accumulator (35);
Accumulator (35) is energy-storage battery, for storage of electrical energy, and exports electric energy when needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310351179.0A CN103399265B (en) | 2013-08-13 | 2013-08-13 | A kind of high voltage cable terminal partial discharge ultrasonic monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310351179.0A CN103399265B (en) | 2013-08-13 | 2013-08-13 | A kind of high voltage cable terminal partial discharge ultrasonic monitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103399265A CN103399265A (en) | 2013-11-20 |
| CN103399265B true CN103399265B (en) | 2015-08-19 |
Family
ID=49562922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310351179.0A Active CN103399265B (en) | 2013-08-13 | 2013-08-13 | A kind of high voltage cable terminal partial discharge ultrasonic monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103399265B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242846A (en) * | 2014-10-15 | 2014-12-24 | 云南电网公司电力科学研究院 | Partial discharge ultrasonic pre-processing circuit |
| CN106093730B (en) * | 2016-07-27 | 2019-04-26 | 杭州柯林电气股份有限公司 | Intelligent type local-discharge ultrasonic wave sensor and its working method |
| CN107831404B (en) * | 2017-09-22 | 2020-02-14 | 国网山东省电力公司电力科学研究院 | Method and system for positioning XLPE cable partial discharge position based on high-frequency pulse current method |
| CN108008270A (en) * | 2017-12-29 | 2018-05-08 | 日新电机（无锡）有限公司 | One kind can monitor partial discharge Assembled high-voltage shunted capacitor device on-line |
| CN112255510A (en) * | 2020-09-14 | 2021-01-22 | 广东电网有限责任公司 | Device and method for improving detection sensitivity of partial discharge of distribution cable |
| CN114280432B (en) * | 2021-11-24 | 2023-10-13 | 浙江新图维电子科技有限公司 | Cable partial discharge monitoring equipment and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782622A (en) * | 2009-11-25 | 2010-07-21 | 西安博源电气有限公司 | Partial discharge on-line monitoring device of power cable and joint |
| CN102590719A (en) * | 2012-02-23 | 2012-07-18 | 四川大学 | Surface mounted device (SMD) sensor device for detecting local discharge of power cable terminal head |
| CN202486275U (en) * | 2012-03-14 | 2012-10-10 | 修武县电业公司 | Acoustoelectric wave detecting device |
| CN202614892U (en) * | 2012-06-08 | 2012-12-19 | 华北电力大学（保定） | Transformer partial discharge positioning system |
| CN202614890U (en) * | 2012-03-20 | 2012-12-19 | 上海市电力公司 | Ultrasonic detector for detecting partial discharges of cable terminal and intermediate head |
| CN202735472U (en) * | 2012-09-06 | 2013-02-13 | 山东康威通信技术股份有限公司 | On-line high voltage cable partial discharge monitoring device for power tunnel |
| CN202854281U (en) * | 2012-08-22 | 2013-04-03 | 哈尔滨理工大学 | RF sensor testing arrangement applicable to online monitoring of partial discharge of high voltage cable terminal |
| CN103135041A (en) * | 2013-01-05 | 2013-06-05 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Transformer/ electric reactor partial discharge on-line monitoring method and transformer/ electric reactor partial discharge on-line monitoring system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3145916B2 (en) * | 1996-02-28 | 2001-03-12 | 東京電力株式会社 | Noise removal method for partial discharge measurement |
-
2013
- 2013-08-13 CN CN201310351179.0A patent/CN103399265B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782622A (en) * | 2009-11-25 | 2010-07-21 | 西安博源电气有限公司 | Partial discharge on-line monitoring device of power cable and joint |
| CN102590719A (en) * | 2012-02-23 | 2012-07-18 | 四川大学 | Surface mounted device (SMD) sensor device for detecting local discharge of power cable terminal head |
| CN202486275U (en) * | 2012-03-14 | 2012-10-10 | 修武县电业公司 | Acoustoelectric wave detecting device |
| CN202614890U (en) * | 2012-03-20 | 2012-12-19 | 上海市电力公司 | Ultrasonic detector for detecting partial discharges of cable terminal and intermediate head |
| CN202614892U (en) * | 2012-06-08 | 2012-12-19 | 华北电力大学（保定） | Transformer partial discharge positioning system |
| CN202854281U (en) * | 2012-08-22 | 2013-04-03 | 哈尔滨理工大学 | RF sensor testing arrangement applicable to online monitoring of partial discharge of high voltage cable terminal |
| CN202735472U (en) * | 2012-09-06 | 2013-02-13 | 山东康威通信技术股份有限公司 | On-line high voltage cable partial discharge monitoring device for power tunnel |
| CN103135041A (en) * | 2013-01-05 | 2013-06-05 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Transformer/ electric reactor partial discharge on-line monitoring method and transformer/ electric reactor partial discharge on-line monitoring system |
Non-Patent Citations (1)
| Title |
|---|
| 基于特高频技术的GIS局部放电在线监测系统;常铁军等;《信息系统工程》;20110720;第24-26页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103399265A (en) | 2013-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103399265B (en) | A kind of high voltage cable terminal partial discharge ultrasonic monitor | |
| CN104090219A (en) | Partial discharge high-frequency monitor of high-voltage cable terminals | |
| CN103344839B (en) | A kind of busbar joint contact resistance method for wirelessly testing and device | |
| CN201569705U (en) | Monitoring device for ground wire resistance and current of distribution transformer | |
| CN204495898U (en) | A kind of transformer superpotential on-line monitoring system | |
| CN204028288U (en) | The checkout equipment of cable local discharge and capacitive coupled sensors | |
| CN102981110A (en) | Data measurement and storage system and method for achieving high frequency and ultra-high frequency partial discharge monitoring of transformer | |
| CN102841243A (en) | Detecting device for exciting current at magnetic bias moment of transformer based on wavelet transformation and working method | |
| CN203337722U (en) | Voltage and current collecting device of grid overhead transmission line | |
| CN101995313A (en) | Vacuum degree on-line monitor of vacuum circuit breaker based on pulse discharge detection | |
| CN102721854B (en) | Power network overvoltage signal detection method and system | |
| CN205210249U (en) | Partial discharge detector system based on ultrasonic sensor | |
| CN203037802U (en) | Data measuring storage system achieving transformer high-frequency and ultrahigh-frequency partial discharge monitoring | |
| CN205353222U (en) | Pulse injection and wave form detecting system in PEA method for coaxial cable | |
| CN210894593U (en) | Enhanced distribution cable insulation defect detection sensor | |
| CN203630283U (en) | Hand-held detection device used for cable insulation detection | |
| CN102759681A (en) | Transformer core ground fault monitoring device | |
| CN202676845U (en) | Device for monitoring earth fault of transformer core | |
| CN203204811U (en) | Wireless transmitting system of partial discharge signal of transformer based on pulse current method detection | |
| CN103983372A (en) | Method for measuring operating temperature of power cable connector based on surface acoustic waves | |
| CN111505701B (en) | Compact accelerator beam phase and position measuring system and method | |
| CN204228893U (en) | A kind of PD On-Line Measurement System | |
| CN207488479U (en) | A kind of current transformer detecting system | |
| CN203705082U (en) | Fiber temperature measurement host and system | |
| CN215415720U (en) | Live detection device for partial discharge of medium-voltage cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |