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 PDF

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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
Application number
CN201320528341.7U
Other languages
Chinese (zh)
Inventor
钱伟杰
魏泽民
纪宏德
覃兆安
胡恒
俞婷倩
奕嘉
彭斐
钟宏伟
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.)
State Grid Corp of China SGCC
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power 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 State Grid Corp of China SGCC, Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201320528341.7U priority Critical patent/CN203825145U/en
Application granted granted Critical
Publication of CN203825145U publication Critical patent/CN203825145U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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

A kind of terminal local discharge detection device of on-the-spot power cable
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.
CN201320528341.7U 2013-08-28 2013-08-28 Device for detecting partial discharge of terminal of on-site power cable Expired - Fee Related CN203825145U (en)

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

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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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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

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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