CN203825145U - Device for detecting partial discharge of terminal of on-site power cable - Google Patents
Device for detecting partial discharge of terminal of on-site power cable Download PDFInfo
- Publication number
- CN203825145U CN203825145U CN201320528341.7U CN201320528341U CN203825145U CN 203825145 U CN203825145 U CN 203825145U CN 201320528341 U CN201320528341 U CN 201320528341U CN 203825145 U CN203825145 U CN 203825145U
- Authority
- CN
- China
- Prior art keywords
- cable
- phase
- current sensor
- frequency current
- frequency
- 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.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000013480 data collection Methods 0.000 abstract 3
- 238000000034 method Methods 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Abstract
The utility model discloses a device for detecting the partial discharge of a terminal of an on-site power cable, and the device comprises electrical equipment in a GIS cylindrical substation, wherein a high-voltage cable of an external inlet wire enters into a substation and then is connected through a cable terminal. The ground wires of B-phase and C-phase cable terminals of a loop line are respectively provided with a high-frequency current sensor. Meanwhile, a binding site of the C-phase cable terminal with the GIS is equipped with a super-high-frequency current sensor. The two high-frequency current sensors and the super-high-frequency current sensor are respectively connected to a signal converter, and are connected to a data-collection industry computer through the signal converter. The data-collection industry computer is provided with a waveform oscilloscope, and is portable detection equipment which can achieve the continuous data collection, collects power-frequency reference phase signals, and employs power-frequency phase trigger sampling. The device is simple in structure, is convenient and reliable in application, does not change the structures of a running cable and an accessory, and is suitable for the on-line detection of a power cable which is put into operation.
Description
Technical field
The utility model relates to a kind of terminal local discharge detection device of on-the-spot power cable, belong to power cable safety detection technology field.
Background technology
At present, the insulation detecting method that is applied to power cable mainly contains DC component method, DC voltage method of superposition, exchanges the methods such as method of superposition, loss current measurement method and shelf depreciation; Development in view of cable local discharge detection correlation technique, the detection method that is usually used in now cable local discharge mainly contains acoustic-emission and Electromagnetic coupling method, and the sensor that wherein Electromagnetic coupling method is used can be divided into the types such as capacitor type, inductive type, ultrahigh frequency, direction coupling and metal film sensors.But above-mentioned the whole bag of tricks carries out the terminal Partial Discharge Detection of on-the-spot power cable, all exists different defects, be mainly the poor reliability detecting, precision is not high enough, is easily subject to impact of extraneous various signals etc.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and provide a kind of simple in structure, easy to use and reliable, do not change the cable that moving and the structure of annex, the terminal local discharge detection device of the on-the-spot power cable of the online detection of the power cable that is applicable to put into operation.
The purpose of this utility model completes by following technical solution, it comprises that the high-tension cable of outside inlet wire enters after transformer station, electrical equipment in the transformer stations such as the GIS cylindrical shell connecting by cable termination, wherein on the B phase of return line and the cable termination ground wire of C phase, a High Frequency Current Sensor is respectively installed, cable termination and GIS binding site in C phase is attached with a ultrahigh-frequency current sensor simultaneously, described two High Frequency Current Sensor and a ultrahigh-frequency current sensor are connected to a signal converter, and be connected in a data acquisition industrial computer by this signal converter.
Described data acquisition industrial computer is with waveform oscilloscope, is a kind ofly can realize continuous data acquisition, gathers power frequency reference phase signal simultaneously, and uses operating frequency phase to trigger the portable checkout equipment of sampling.
Described portable checkout equipment can carry out data acquisition with the sample frequency of 20MHz and the sampling depth of 2M, realizes the continuous data recording degree of depth that reaches 5 power frequency periods.
The utility model is a kind of method based on HF and UHF joint-detection, realize the object of on-the-spot hv cable termination Partial Discharge Detection, use High Frequency Current Sensor to detect the high frequency partial discharge current signal of the cable grounding line of flowing through, the electromagnetic wave signal of uhf sensor inductive spacing radiation, thus realized the continuous monitoring to cable terminal insulation situation.High Frequency Current Sensor and uhf sensor that the utility model is used are all non-intrusion type detection methods, do not affect the state of the system of reruning, and are applicable to the online detection of cable.
The utlity model has simple in structurely, easy to use and reliable, do not change the cable that moving and the structure of annex, the features such as online detection of the power cable that is applicable to put into operation.
Accompanying drawing explanation
Fig. 1 is that structure of the present utility model forms schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1, the terminal local discharge detection device of on-the-spot power cable described in the utility model, it comprises that the high-tension cable of outside inlet wire enters after transformer station, electrical equipment in the transformer stations such as the GIS cylindrical shell 2 connecting by cable termination 1, wherein on the B phase of return line and the cable termination ground wire 3 of C phase, a High Frequency Current Sensor 4 is respectively installed, cable termination 1 and GIS binding site 5 in C phase is attached with a uhf sensor 6 simultaneously, described two High Frequency Current Sensor 4 and a ultrahigh-frequency current sensor 6 are connected to a signal converter 7, and be connected in a data acquisition industrial computer 8 by this signal converter 7.
Described data acquisition industrial computer 8 is with waveform oscilloscope 9, is a kind ofly can realize continuous data acquisition, and gather power frequency reference phase signal simultaneously, and use operating frequency phase to trigger the portable checkout equipment of sampling, be a kind of prior art.
Described portable checkout equipment can carry out data acquisition with the sample frequency of 20MHz and the sampling depth of 2M, realizes the continuous data recording degree of depth that reaches 5 power frequency periods.
The utility model is a kind of method based on HF and UHF joint-detection, realize the object of on-the-spot hv cable termination Partial Discharge Detection, use High Frequency Current Sensor to detect the high frequency partial discharge current signal of the cable grounding line of flowing through, the electromagnetic wave signal of uhf sensor inductive spacing radiation, thus realized the continuous monitoring to cable terminal insulation situation.High Frequency Current Sensor and uhf sensor that the utility model is used are all non-intrusion type detection methods, do not affect the state of the system of reruning, and are applicable to the online detection of cable.
Claims (3)
1. the terminal local discharge detection device of an on-the-spot power cable, it comprises that the high-tension cable of outside inlet wire enters after transformer station, electrical equipment in the GIS cylindrical shell transformer station connecting by cable termination, it is characterized in that: wherein on the B phase of return line and the cable termination ground wire of C phase, a High Frequency Current Sensor is respectively installed, cable termination and GIS binding site in C phase is attached with a ultrahigh-frequency current sensor simultaneously, described two High Frequency Current Sensor and a ultrahigh-frequency current sensor are connected to a signal converter, and be connected in a data acquisition industrial computer by this signal converter.
2. the terminal local discharge detection device of on-the-spot power cable according to claim 1, it is characterized in that: described data acquisition industrial computer is with waveform oscilloscope, a kind ofly can realize continuous data acquisition, gather power frequency reference phase signal simultaneously, and use operating frequency phase to trigger the portable checkout equipment of sampling.
3. the terminal local discharge detection device of on-the-spot power cable according to claim 2, it is characterized in that: described portable checkout equipment can carry out data acquisition with the sample frequency of 20MHz and the sampling depth of 2M, realize the continuous data recording degree of depth that reaches 5 power frequency periods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320528341.7U CN203825145U (en) | 2013-08-28 | 2013-08-28 | Device for detecting partial discharge of terminal of on-site power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320528341.7U CN203825145U (en) | 2013-08-28 | 2013-08-28 | Device for detecting partial discharge of terminal of on-site power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825145U true CN203825145U (en) | 2014-09-10 |
Family
ID=51480627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320528341.7U Expired - Fee Related CN203825145U (en) | 2013-08-28 | 2013-08-28 | Device for detecting partial discharge of terminal of on-site power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825145U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020764A (en) * | 2017-12-27 | 2018-05-11 | 国家电网公司 | A kind of high voltage electric equipment local discharge on-line monitoring device |
| CN110133428A (en) * | 2019-06-25 | 2019-08-16 | 武汉伏佳安达电气技术有限公司 | A kind of high voltage power cable comprehensive state amount monitoring technology method |
| CN110596544A (en) * | 2019-09-04 | 2019-12-20 | 国网四川省电力公司电力科学研究院 | Partial discharge test platform under power cable frequency conversion series resonance |
-
2013
- 2013-08-28 CN CN201320528341.7U patent/CN203825145U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020764A (en) * | 2017-12-27 | 2018-05-11 | 国家电网公司 | A kind of high voltage electric equipment local discharge on-line monitoring device |
| CN110133428A (en) * | 2019-06-25 | 2019-08-16 | 武汉伏佳安达电气技术有限公司 | A kind of high voltage power cable comprehensive state amount monitoring technology method |
| CN110596544A (en) * | 2019-09-04 | 2019-12-20 | 国网四川省电力公司电力科学研究院 | Partial discharge test platform under power cable frequency conversion series resonance |
| CN110596544B (en) * | 2019-09-04 | 2022-02-11 | 国网四川省电力公司电力科学研究院 | Partial discharge test platform under power cable frequency conversion series resonance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101750573A (en) | Portable cable local discharge detection device | |
| CN103558520A (en) | Partial-discharge electrification detecting system and locating method for gas-insulation combined electrical appliance | |
| CN202563057U (en) | Transformer iron core ground wire broadband partial discharge detector | |
| CN103558523A (en) | Detection device for partial discharge of switch cabinet | |
| CN103712551A (en) | Power distribution network transformer low-voltage winding deformation on-line monitoring device and method | |
| CN103558524A (en) | Detection device for partial discharge of switch cabinet | |
| CN203881834U (en) | AC-DC current wireless monitoring equipment | |
| CN203929973U (en) | A kind of down-hole power cable insulation monitoring device | |
| CN104569764A (en) | Live detection system for creeping discharge of composite apparatus and method thereof | |
| CN101995313A (en) | Vacuum degree on-line monitor of vacuum circuit breaker based on pulse discharge detection | |
| CN203825145U (en) | Device for detecting partial discharge of terminal of on-site power cable | |
| CN203054160U (en) | TEV sensor used in partial discharge detection of switch cabinet | |
| CN101718817A (en) | Device and method for measuring voltage phase of high-voltage line in field intensity type non-contact way | |
| CN202583397U (en) | A partial discharge monitoring and positioning system of high-tension switch cabinet | |
| CN102680862A (en) | Device and method for online monitoring of partial discharge of shunt capacitor | |
| CN103983371A (en) | Method for measuring operating temperature of transformer lead connector based on surface acoustic waves | |
| CN203981829U (en) | Local discharge detection device in a kind of high-tension switch cabinet | |
| CN203561722U (en) | Two-frequency signal detection position indicator for electricity overhead line | |
| CN203798969U (en) | Cable partial discharge detection system based on frequency conversion resonance voltage resistance | |
| CN203630279U (en) | Detection device for partial discharge of switch cabinet | |
| CN203798466U (en) | Operating temperature measuring device based on surface acoustic wave for conductor connection point in switch cabinet | |
| CN104215887A (en) | Portable partial discharge detector | |
| CN205450181U (en) | A portable equipment for high tension switchgear's local discharge on -line monitoring | |
| CN204154787U (en) | Insulator spread voltage tester | |
| CN203224571U (en) | A flexible grounding resistance tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20200828 |