CN203759190U - Distribution network cable partial discharge on-line monitoring and discharge position positioning system - Google Patents

Distribution network cable partial discharge on-line monitoring and discharge position positioning system Download PDF

Info

Publication number
CN203759190U
CN203759190U CN201420128828.0U CN201420128828U CN203759190U CN 203759190 U CN203759190 U CN 203759190U CN 201420128828 U CN201420128828 U CN 201420128828U CN 203759190 U CN203759190 U CN 203759190U
Authority
CN
China
Prior art keywords
cable
collector
discharge
frequency current
current sensor
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
Application number
CN201420128828.0U
Other languages
Chinese (zh)
Inventor
梁红军
严学文
王娟婷
杨江维
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi Public Electric Co., Ltd.
Original Assignee
Shaanxi Public Intelligent Science & Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shaanxi Public Intelligent Science & Technology Co Ltd filed Critical Shaanxi Public Intelligent Science & Technology Co Ltd
Priority to CN201420128828.0U priority Critical patent/CN203759190U/en
Application granted granted Critical
Publication of CN203759190U publication Critical patent/CN203759190U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a distribution network cable partial discharge on-line monitoring and discharge position positioning system, comprising high-frequency current sensors nested on cable body shielding layer ground wires, gatherers and an industrial control computer. A partial discharge pulse current signal of a cable body is coupled through the high-frequency current sensor installed on the ring main unit cable shielding layer ground wire, the coupled pulse current signal is transmitted to the gatherer through a coaxial cable, an analog signal is converted into a digital signal through amplification, filtering and analog-to-digital conversion, then the signal is transmitted to the industrial control computer in a 3G wireless way. The industrial control computer respectively performs classification, identification, analysis and calculation to the signals of the all sensors, then writes discharge information data obtained by the calculation into a database, and displays a result of the discharge information data. The distribution network cable partial discharge on-line monitoring and discharge position positioning system of the utility model realizes real-time monitoring and positioning for partial discharge generated by ring main unit cable joints and bodies without taking power on site and laying a communication line, thereby achieving the effect of convenient installation.

Description

A kind of distribution network cable partial discharge monitoring and discharge position positioning system
Technical field
The utility model relates to insulation of electrical installation monitoring technology, is specifically related to a kind of distribution network cable partial discharge monitoring and discharge position positioning system.
Background technology
Power cable, as the main transmission channel of electric power, is of paramount importance equipment in transmission of electricity.But cable end-of-run, is subject to the branch of cable body insulation aging, the impact that electricity-heat ageing and annex are aging, the failure rate of power cable will significantly rise.Once there is cable fault, will affect people's lives, country, enterprise, individual are caused to economic loss.
Partial Discharge Detection is the main project of cable insulation (particularly plastic cable) non-destructive electrical inspection always, is more and more counted as the most effective isolation diagnostic method of one, and object is to observe and study the insulation ageing problem that shelf depreciation causes.
Both at home and abroad operating experience and achievement in research show: XLPE power cable performance is early stage deteriorated or depend on to a great extent that the dendroid of its insulating medium is aging serviceable life, and measurement of partial discharge is one of effective ways of quantitative test dendroid degradation.But also not having now a set of equipment to realize detects distribution network cable shelf depreciation.
Utility model content
The utility model is in order to solve the problems of the technologies described above, a kind of distribution network cable partial discharge monitoring and discharge position positioning system are provided, the shelf depreciation of distribution network cable is carried out to on-line monitoring, find in time the insulation defect of cable and joint, and provide criterion for assessing its dielectric level and degree of aging, for the service work of cable provide according to and cost low.
The utility model is to be achieved through the following technical solutions:
A kind of distribution network cable partial discharge monitoring and discharge position positioning system, comprise High Frequency Current Sensor, collector and industrial computer, described High Frequency Current Sensor is nested on ring main unit cable body shielding layer grounding line, described High Frequency Current Sensor is connected on the cable acquisition channel on collector by concentric cable, described collector the inside is provided with capture card, on described collector, be connected with GPS time service module by cable respectively, 3G wireless module and lithium battery, on described lithium battery, be connected with solar panel, 3G wireless module and the collector GPS time service module of triggering collection simultaneously that realizes different location, described capture card, for the ring main unit cable body pulse current of PD signal that is transferred to collector through concentric cable receiving is carried out to high-speed sampling, storage, and the signal after sampling is amplified, filtering, after analog to digital conversion, become digital signal, then by 3G wireless module by digital data transmission in industrial computer,
Described industrial computer, for the digital signal receiving is carried out respectively to Classification and Identification analysis, calculating, and the shelf depreciation information data that these are obtained by calculating is written in database, and shows shelf depreciation information data.
Described capture card adopts can realize 100Msps, the high-speed sampling of 12Bit resolution, storage, the high-performance FPGA processor that each analysis can 50 above data of power frequency period of continuous sampling.
The shelf depreciation information exchange that in described industrial computer, database obtains is crossed network cable transmission to internet.
On the ring main unit cable body shielding layer grounding line of cable two end connectors, High Frequency Current Sensor is set respectively, two High Frequency Current Sensor are connected on the cable acquisition channel on collector separately by concentric cable respectively, described collector the inside is provided with capture card, on described collector, be connected with GPS time service module by cable respectively, 3G wireless module and lithium battery, on described lithium battery, be connected with solar panel, 3G wireless module and GPS time service module, described capture card, for the ring main unit cable body pulse current of PD signal that is transferred to collector through concentric cable receiving is carried out to high-speed sampling, storage, and the signal after sampling is amplified, filtering, after analog to digital conversion, become digital signal, then by 3G wireless module by digital data transmission in industrial computer,
Described industrial computer, for the digital signal receiving is carried out respectively to Classification and Identification analysis, calculating, and the shelf depreciation information data that these are obtained by calculating is written in database, and shows shelf depreciation information data.
Described High Frequency Current Sensor is the High Frequency Current Sensor that monitoring frequency range is 50KHZ-30MHZ.
Described High Frequency Current Sensor is the High Frequency Current Sensor of the pincerlike structure of open-close type.
Compared with prior art, the utlity model has following useful technique effect:
The distribution network cable partial discharge monitoring that the utility model provides and discharge position positioning system, by nested High Frequency Current Sensor on ring main unit cable body shielding layer grounding line, make the pulse current of PD signal of High Frequency Current Sensor coupling ring main unit cable body, and be sent to by concentric cable in the capture card of collector, the capture card of collector converts pulse current of PD signal to digital signal, and then carry out remote transmission and industrial computer communicates by 3G wireless module, realize the shelf depreciation of ring main unit cable splice and body generation has been carried out to Real-Time Monitoring and location, without on-the-spot power taking, without laying communication line, easy for installation, can realize without dead angle and monitoring, can effectively solve defect and the deficiency of existing distribution network cable on-line monitoring.
Described collector adopts the time service via satellite of GPS time service module, realizes the collector triggering collection simultaneously of different location, and synchronization accuracy is high.
Described system employing sun power adds lithium battery and combines power supply, without external power supply, without laying power lead.
In addition, described cable local discharge monitoring adopts both-end localization method, can realize the shelf depreciation that cable body is produced and locate in real time, and positioning precision can reach positive/negative 3 meters.
Further, described High Frequency Current Sensor adopts the pincerlike structure of open-close type, removes and installs conveniently.
Brief description of the drawings
Distribution network cable partial discharge monitoring and discharge position positioning system structure schematic diagram that Fig. 1 provides for the utility model;
Fig. 2 is that the utility model is to Partial discharge signal orientation demonstration figure.
Wherein: 1, A phase bus; 2, B phase bus; 3, C phase bus; 4, ring main unit feeder pillar; 5, cable; 6, High Frequency Current Sensor; 7, ring main unit cable body shielding layer grounding line; 8, concentric cable; 9, collector; 9-1, capture card; 9-2, cable acquisition channel; 10, twisted-pair feeder; 11, five heart yearns; 12, netting twine; 13, solar panel; 14, lithium battery; 15,3G wireless module; 16, GPS time service module; 17, industrial computer; 18, PD point of discharge.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Referring to Fig. 1, Fig. 2, a kind of distribution network cable partial discharge monitoring and discharge position positioning system, comprise High Frequency Current Sensor 6, collector 9 and industrial computer 17, described High Frequency Current Sensor 6 is nested on ring main unit cable body shielding layer grounding line 7, described High Frequency Current Sensor 6 is connected on the cable acquisition channel 9-2 on collector 9 by concentric cable 8, described collector 9 the insides are provided with the capture card 9-1 that adopts high-performance FPGA processor, on described collector 9, be connected with GPS time service module 16 by netting twine 12, on collector 9, be connected with 3G wireless module 15 by five heart yearns 11, on collector 9, be connected with lithium battery 14 by twisted-pair feeder 10, on described lithium battery 14, be connected with solar panel 13 by twisted-pair feeder 10, lithium battery 14 is also connected with GPS time service module 16 with 3G wireless module 15 respectively by twisted-pair feeder 10, power to 3G wireless module 15 and GPS time service module 16, described capture card 9-1, for the ring main unit cable body pulse current of PD signal that is transferred to collector 9 through concentric cable 8 receiving is carried out to high-speed sampling, storage, and the signal after sampling is amplified, becomes digital signal after filtering, analog to digital conversion, then by 3G wireless module 15 by digital data transmission in industrial computer 17, described industrial computer 17, for the digital signal receiving is carried out respectively to Classification and Identification analysis, calculating, and the shelf depreciation information data that these are obtained by calculating is written in database, and shows shelf depreciation information data.Meanwhile, the shelf depreciation information exchange that in described industrial computer 17, database obtains is crossed netting twine 12 and is transferred to internet.
Further, on the ring main unit cable body shielding layer grounding line 7 of 5 liang of end connectors of cable, High Frequency Current Sensor 6 is set respectively, two High Frequency Current Sensor 6 are connected on the cable acquisition channel 9-2 on collector 9 separately by concentric cable 8 respectively, described collector 9 the insides are provided with capture card 9-1, on described collector 9, be connected with GPS time service module 16 by cable respectively, 3G wireless module 15 and lithium battery 14, on described lithium battery 14, be connected with solar panel 13, the power storage that solar panel 13 is provided is in lithium battery 14, described lithium battery 14 is connected with GPS time service module 16 with 3G wireless module 15 respectively by twisted-pair feeder 10, power to 3G wireless module 15 and GPS time service module 16, described capture card 9-1, for the ring main unit cable body pulse current of PD signal that is transferred to collector 9 through concentric cable 8 receiving is carried out to high-speed sampling, storage, and the signal after sampling is amplified, filtering, after analog to digital conversion, become digital signal, then by 3G wireless module 15 by digital data transmission in industrial computer 17, described industrial computer 17, for the digital signal receiving is carried out respectively to Classification and Identification analysis, calculating, and the shelf depreciation information data that these are obtained by calculating is written in database, and shows shelf depreciation information data.
Wherein, the frequency range of described High Frequency Current Sensor monitoring is 50KHZ-30MHZ, and the pincerlike structure of described High Frequency Current Sensor employing open-close type, removes and installs conveniently.Meanwhile, because described collector is connected with GPS time service module, produce trigger pip, precision is high.Capture card in described collector adopts high-performance FPGA processor, realizes 100Msps, the high-speed sampling of 12Bit resolution, storage, each analysis can continuous sampling 50 data more than power frequency period.
It should be noted that, on described cable 5, be connected with A phase bus 1, B phase bus 2 and C phase bus 3, the outer ring main unit feeder pillar 4 that is provided with of A phase bus, B phase bus, C phase bus and cable 5.
Concrete, mainly comprise with reference to this system of Fig. 1: capture card 9-1, solar panel 13, lithium battery 14, GPS time service module 16 and the 3G wireless module 15 of High Frequency Current Sensor 6, collector 9, industrial computer 17 and collector 9 the insides.
A High Frequency Current Sensor 6 is nested on ring main unit cable body shielding layer grounding line 7, by the be coupled pulse current of PD signal of ring main unit cable body of High Frequency Current Sensor 6, High Frequency Current Sensor 6 is connected with the cable acquisition channel 9-2 on collector 9 by concentric cable 8, on collector 9, be connected with capture card 9-1, the pulse current of PD signal that High Frequency Current Sensor 6 is coupled to is sent to collector 9 by concentric cable 8, in collector 9, capture card 9-1 adopts high-performance FPGA processor, realize 100Msps, the high-speed sampling of 12Bit resolution, storage, the partial discharge pulse's signal collecting is through amplifying, filtering, after analog to digital conversion, become digital signal and carry out remote transmission communication by 3G wireless module and industrial computer 17 again, industrial computer 17 carries out respectively Classification and Identification analysis to the signal of the High Frequency Current Sensor 6 on the outer ring main unit cable body of cable 5 shielding layer grounding line 7, calculate, and the discharge information data that these are obtained by calculating are written in database, on the software of monitoring system, show result simultaneously.Meanwhile, the Partial discharge signal information exchange that in industrial computer 17, database obtains is crossed netting twine 12 and is transferred to internet.
With reference to Fig. 2, the present embodiment is nested in the High Frequency Current Sensor 6 on ring main unit cable body shielding layer grounding line 7, and described cable 5 two ends joint length are L km, supposes that PD point of discharge 18 is Δ L in the distance of the left joint of cable, and the time of transmission is t1; Be L-Δ L apart from the distance of cable right connector so, the time is t2.The speed that shelf depreciation is propagated in cable is similar to light velocity V, is given data, and we can draw following formula:
ΔL=t1*V (1)
L-ΔL=t2*V (2)
Can be determined by above (1) and (2) two formulas:
t1=ΔL/V (3)
t2=(L-ΔL)/V (4)
Can be determined by above (3) and (4) two formulas:
t2-t1=(L-2ΔL)/V (5)
Because native system adopts optical fiber synchronous acquisition technology, we can determine that Partial discharge signal arrives the mistiming at cable two ends, suppose the time t2>t1 of the right-hand member cable splice of arrival, can draw:
Δt=t2-t1 (6)
Therefore above (5) and (6) two formula solving equations of associating, can determine apart from left end cable splice discharge position Δ L:
ΔL=(L-ΔtV)/2
Therefore, we can accurately determine the position of shelf depreciation, i.e. PD point of discharge 18 is realized the location that cable body certain office puts.
The utility model distribution network cable partial discharge monitoring and discharge position positioning system, adopt 3G wireless mode to carry out data transmission, and GPS time service module is carried out synchronous precision triggering, and lithium battery and sun power are in conjunction with giving system power supply.By being arranged on the pulse current of PD signal of the High Frequency Current Sensor coupling cable body on ring main unit cable shielding layer earthing line, the pulsed current signal being coupled to is sent to collector by concentric cable, simulating signal is become to digital signal after amplification, filtering, analog to digital conversion, then be sent to industrial computer with 3G wireless mode.Wherein, collector, 3G wireless communication module, GPS module adopt lithium battery to add the mode that solar cell is combined power supply, have ensured delivery, also take full advantage of sun power.
The utility model adopts both-end monitoring, sun power in conjunction with the synchronous method triggering of lithium battery power supply, 3G Wireless Data Transmission and GPS time service, realize the shelf depreciation of ring main unit cable splice and body generation is carried out to Real-Time Monitoring and location, without on-the-spot power taking, without laying communication line, easy for installation, can effectively solve defect and the deficiency of existing distribution network cable on-line monitoring.And this system cost is low, can finds in time the insulation defect of cable and joint, and provide criterion for assessing its dielectric level and degree of aging, for the service work of cable provides foundation.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (6)

1. a distribution network cable partial discharge monitoring and discharge position positioning system, it is characterized in that, comprise High Frequency Current Sensor (6), collector (9) and industrial computer (17), described High Frequency Current Sensor (6) is nested on ring main unit cable body shielding layer grounding line (7), described High Frequency Current Sensor (6) is connected on the cable acquisition channel (9-2) on collector (9) by concentric cable (8), described collector (9) the inside is provided with capture card (9-1), on described collector (9), be connected with GPS time service module (16) by cable respectively, 3G wireless module (15) and lithium battery (14), on described lithium battery (14), be connected with solar panel (13), 3G wireless module (15) and realize the simultaneously GPS time service module (16) of triggering collection of collector of different location, described capture card (9-1), for the ring main unit cable body pulse current of PD signal that is transferred to collector (9) through concentric cable (8) receiving is carried out to high-speed sampling, storage, and the signal after sampling is amplified, filtering, after analog to digital conversion, become digital signal, then by 3G wireless module (15), digital data transmission is arrived in industrial computer (17),
Described industrial computer (17), for the digital signal receiving is carried out respectively to Classification and Identification analysis, calculating, and the shelf depreciation information data that these are obtained by calculating is written in database, and shows shelf depreciation information data.
2. distribution network cable partial discharge monitoring according to claim 1 and discharge position positioning system, it is characterized in that, described capture card (9-1) adopts can realize 100Msps, the high-speed sampling of 12Bit resolution, storage, the high-performance FPGA processor that each analysis can 50 above data of power frequency period of continuous sampling.
3. distribution network cable partial discharge monitoring according to claim 1 and discharge position positioning system, is characterized in that, the shelf depreciation information exchange that in described industrial computer (17), database obtains is crossed netting twine (12) and is transferred to internet.
4. distribution network cable partial discharge monitoring according to claim 1 and discharge position positioning system, it is characterized in that, on the ring main unit cable body shielding layer grounding line (7) of cable (5) two end connectors, High Frequency Current Sensor (6) is set respectively, two High Frequency Current Sensor (6) are connected on the cable acquisition channel (9-2) on collector (9) separately by concentric cable (8) respectively, described collector (9) the inside is provided with capture card (9-1), on described collector (9), be connected with GPS time service module (16) by cable respectively, 3G wireless module (15) and lithium battery (14), on described lithium battery (14), be connected with solar panel (13), 3G wireless module (15) and GPS time service module (16), described capture card (9-1), for the ring main unit cable body pulse current of PD signal that is transferred to collector (9) through concentric cable (8) receiving is carried out to high-speed sampling, storage, and the signal after sampling is amplified, filtering, after analog to digital conversion, become digital signal, then by 3G wireless module (15), digital data transmission is arrived in industrial computer (17),
Described industrial computer (17), for the digital signal receiving is carried out respectively to Classification and Identification analysis, calculating, and the shelf depreciation information data that these are obtained by calculating is written in database, and shows shelf depreciation information data.
5. distribution network cable partial discharge monitoring according to claim 1 and discharge position positioning system, is characterized in that, the High Frequency Current Sensor that described High Frequency Current Sensor (6) is 50KHZ-30MHZ for monitoring frequency range.
6. distribution network cable partial discharge monitoring and discharge position positioning system according to claim 1 or 5, is characterized in that, described High Frequency Current Sensor (6) is the High Frequency Current Sensor (6) of the pincerlike structure of open-close type.
CN201420128828.0U 2014-03-20 2014-03-20 Distribution network cable partial discharge on-line monitoring and discharge position positioning system Active CN203759190U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420128828.0U CN203759190U (en) 2014-03-20 2014-03-20 Distribution network cable partial discharge on-line monitoring and discharge position positioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420128828.0U CN203759190U (en) 2014-03-20 2014-03-20 Distribution network cable partial discharge on-line monitoring and discharge position positioning system

Publications (1)

Publication Number Publication Date
CN203759190U true CN203759190U (en) 2014-08-06

Family

ID=51254446

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420128828.0U Active CN203759190U (en) 2014-03-20 2014-03-20 Distribution network cable partial discharge on-line monitoring and discharge position positioning system

Country Status (1)

Country Link
CN (1) CN203759190U (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104777386A (en) * 2015-04-22 2015-07-15 西南石油大学 Failure analyzing and detecting system for cable accessories
CN105021959A (en) * 2015-07-06 2015-11-04 国家电网公司 Novel partial discharge live-line detection system and method for main equipment of distribution network
CN105182199A (en) * 2015-09-23 2015-12-23 陕西公众智能科技有限公司 High-voltage cable partial discharge online monitoring and discharge position positioning system and method
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
CN107037340A (en) * 2017-05-24 2017-08-11 哈尔滨理工大学 A kind of to-and-fro thread feed electric spark wire-electrode cutting machine discharge position acquisition system
CN107398612A (en) * 2017-09-13 2017-11-28 厦门大学 A kind of electric spark clearance discharge condition detection apparatus and method based on cluster analysis
CN107505543A (en) * 2017-08-11 2017-12-22 河南天通电力有限公司 Based on mesolow cable local discharge on-line monitoring system
CN110940900A (en) * 2019-12-03 2020-03-31 湖北才诚电力工程设计有限公司 Electric power engineering construction state on-line monitoring system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104777386A (en) * 2015-04-22 2015-07-15 西南石油大学 Failure analyzing and detecting system for cable accessories
CN105021959A (en) * 2015-07-06 2015-11-04 国家电网公司 Novel partial discharge live-line detection system and method for main equipment of distribution network
CN105182199A (en) * 2015-09-23 2015-12-23 陕西公众智能科技有限公司 High-voltage cable partial discharge online monitoring and discharge position positioning system and method
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
CN107037340A (en) * 2017-05-24 2017-08-11 哈尔滨理工大学 A kind of to-and-fro thread feed electric spark wire-electrode cutting machine discharge position acquisition system
CN107037340B (en) * 2017-05-24 2019-10-22 哈尔滨理工大学 A kind of to-and-fro thread feed electric spark wire-electrode cutting machine discharge position acquisition system
CN107505543A (en) * 2017-08-11 2017-12-22 河南天通电力有限公司 Based on mesolow cable local discharge on-line monitoring system
CN107398612A (en) * 2017-09-13 2017-11-28 厦门大学 A kind of electric spark clearance discharge condition detection apparatus and method based on cluster analysis
CN110940900A (en) * 2019-12-03 2020-03-31 湖北才诚电力工程设计有限公司 Electric power engineering construction state on-line monitoring system

Similar Documents

Publication Publication Date Title
CN203759190U (en) Distribution network cable partial discharge on-line monitoring and discharge position positioning system
CN204989404U (en) Cable partial discharge on -line monitoring system
CN202974924U (en) Online earth resistivity monitoring system
CN203241505U (en) Portable cable insulation live detector and locator
CN205193212U (en) Insulating detecting system of DC cable
CN103823155A (en) AT traction network short circuit fault distance measurement method
CN202836615U (en) Intelligent electrical network comprehensive on-line monitoring system
CN103823159A (en) Distribution network fault distance measuring device based on fault transient state travelling wave collection and distance measuring method
CN105182199A (en) High-voltage cable partial discharge online monitoring and discharge position positioning system and method
CN204462246U (en) A kind of HVDC (High Voltage Direct Current) transmission line corona loss measuring system
CN106093705A (en) A kind of computational methods of one-phase earthing failure in electric distribution network wavefront
CN205002798U (en) Direct current electromagnetic environment monitoring system based on zigBee
CN202599441U (en) System for acquiring state data of power transformer
CN106443351A (en) System and method for detecting faults of multi-core cables of ships
CN202471845U (en) Lightning arrester remote on-line monitoring device
CN203825142U (en) Power supply line fault locating instrument
CN105004973A (en) Dual-end measured overhead insulating wire local discharge positioning system and method
CN202869655U (en) Online temperature monitoring device of high-voltage electrical equipment
CN104698265A (en) High-voltage direct current transmission line corona loss measurement system
CN205450178U (en) Transmission line fault locating on -line monitoring device
CN204043713U (en) A kind of powerline ice-covering on-Line Monitor Device
CN204649846U (en) The automatic locating and detecting device of stake resistance GPS
CN203838113U (en) System for on-line monitoring of mechanical states of ceramic post insulators
CN105403815A (en) Insulator live detection system and method based on wireless ad hoc network communication
CN103364695A (en) Local discharging on-line monitoring device of high-voltage cable

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20190729

Address after: 710065 Tsinghua Science Park, No. 65, No. 2 Science and Technology Road, Xi'an High-tech Zone, Shaanxi Province, 7 buildings, No. 2222

Patentee after: Shaanxi Public Electric Co., Ltd.

Address before: Room 1152, Unit 1, Building No. 34, Fenghuinan Road, Yanta District, Xi'an City, Shaanxi Province

Patentee before: SHAANXI PUBLIC INTELLIGENT SCIENCE & TECHNOLOGY CO., LTD.

TR01 Transfer of patent right