CN202404198U - Utra-high-frequency partial discharge detection device of SF6 current transformer - Google Patents
Utra-high-frequency partial discharge detection device of SF6 current transformer Download PDFInfo
- Publication number
- CN202404198U CN202404198U CN2011203744797U CN201120374479U CN202404198U CN 202404198 U CN202404198 U CN 202404198U CN 2011203744797 U CN2011203744797 U CN 2011203744797U CN 201120374479 U CN201120374479 U CN 201120374479U CN 202404198 U CN202404198 U CN 202404198U
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- Prior art keywords
- current transformer
- partial discharge
- secondary lead
- lead wires
- utra
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Abstract
The utility model relates to a current transformer, specially relates to an utra-high-frequency partial discharge detection device of an SF6 current transformer. The device comprises a current transformer housing and a secondary coil arranged in the current transformer housing through an insulator by coaxial fixed mounting, and the lead wire of the secondary coil is led downward from the vertical secondary lead wire shield pipe to the grounding terminal of the secondary lead plate on a pedestal. The utra-high-frequency partial discharge detection device of an SF6 current transformer is characterized in that a partial discharge sensor is arranged in the secondary lead wire shield pipe positioned at the insulator, and the output signal line of the partial discharge sensor is led to the special-purpose terminal of the secondary lead plate on the pedestal along the middle and lower portions of the secondary lead wire shield pipe. According to the device, under the condition that equipment keeps working, the equipment insulation defect case can be conveniently discovered in time, and simultaneously, the partial discharge sensor is connected to a detection system, and the live-line or on-line monitoring of the partial discharge of the SF6 current transformer is realized, and the structure is simple and practical, etc.
Description
Technical field
The utility model relates to a kind of current transformer, particularly SF
6Current transformer high-frequency local discharging pick-up unit.
Background technology
SF
6Current transformer is generally inverted structure, and promptly the primary conductive bar directly passes secondary coil from top shell, keeps the coaxial cylindrical electric field to add between primary conductive bar and secondary coil, between secondary coil and housing.On the housing that the support insulator or the disc insulator of secondary coil through poured with epoxy resin is supported and fixed on current transformer, its lead-in wire draws down to base from vertical secondary lead wires shielded-plate tube draws.Secondary Winding all shields with metal cylinder, and its bonding downlead is connected on the ground terminal of secondary lead wires plate.
The method that is used for the high voltage electric equipment Partial Discharge Detection at present has pulse current method, chemical measure, ultrasonic Detection Method and ultrahigh frequency detection method etc.Pulse current method is subject to the influence of external interference, generally is not used in the measurement of partial discharge of operational outfit, the measurement of partial discharge before the equipment of being generally used for puts into operation.There is not jamproof problem in chemical measure; And sensitivity is higher; But because the variation of insulating medium chemical constitution needs certain hour; So chemical measure can't just detect shelf depreciation in the starting stage of shelf depreciation development, is unfavorable for the timely discovery of shelf depreciation and takes treatment measures.It is that the ultrasonic uhf electromagnetic wave signal that involves that is produced when directly using dedicated probe that charging equipment generation office is put is gathered that ultrasonic Detection Method and ultrahigh frequency detect rule, then through processes such as screening of signals, analysis are determined whether to exist shelf depreciation.The ability of the anti-electromagnetic interference (EMI) of ultrasonic signal is more intense, high directivity, but at SF
6It is very fast to decay in the gas, and is subject to the influence of vibration equipment, therefore is mainly used in the location of shelf depreciation.
Summary of the invention
The purpose of the utility model is the defective that overcomes prior art, and providing a kind of does not influence the normal operation of equipment and can realize SF
6The charged detection of current transformer shelf depreciation or the SF of online detection
6Current transformer high-frequency local discharging pick-up unit.
For realizing the purpose of the utility model, the technical scheme that is adopted is: a kind of SF
6Current transformer high-frequency local discharging pick-up unit; Comprise by the current transformer housing with through the coaxial secondary coil that is fixedly mounted in the current transformer housing of insulator; The lead-in wire of secondary coil causes on the ground terminal of the secondary lead wires plate on the base down from vertical secondary lead wires shielded-plate tube; It is characterized in that local discharge sensor is installed in the secondary lead wires shielded-plate tube that is arranged in the insulator place, the output signal line of local discharge sensor is along the dedicated terminals that causes the secondary lead wires plate on the base in the secondary lead wires shielded-plate tube down.
The present technique scheme has overcome the method defective of existing high voltage electric equipment Partial Discharge Detection, through being installed in the local discharge sensor in the secondary lead wires shielded-plate tube, can realize the SF that uses the present invention to design
6Current transformer high-frequency local discharging monitoring probe can be under the situation of outaged equipment not, convenient discovering device insulation defect situation timely, and local discharge sensor can be realized SF with after detection system is connected simultaneously
6The live monitoring of current transformer shelf depreciation or on-line monitoring can in time be found, in time handle defective, prevent further developing even causing the accident of defective, and there is practical significance the idle time that reduces equipment.Characteristics such as that this device has is simple in structure, practicality.
Description of drawings
Accompanying drawing 1 is the cross-sectional view of the utility model.
Embodiment
As shown in Figure 1, at SF
6In the current transformer; Secondary coil 2 is through insulator 3 coaxial being fixedly mounted in the current transformer housing 1; The lead-in wire of secondary coil causes on the ground terminal of the secondary lead wires plate 6 on the base down from vertical secondary lead wires shielded-plate tube 5; Local discharge sensor 4 is installed in the secondary lead wires shielded-plate tube that is arranged in the insulator place, and the output signal line of local discharge sensor is along the dedicated terminals that causes the secondary lead wires plate on the base in the secondary lead wires shielded-plate tube down.When carrying out measurement of partial discharge, only need to use signal wire that instrument for measuring partial discharge is connected with dedicated terminals, just can the measure local discharge capacity.
Claims (1)
1. SF
6Current transformer high-frequency local discharging pick-up unit; Comprise by the current transformer housing with through the coaxial secondary coil that is fixedly mounted in the current transformer housing of insulator; The lead-in wire of secondary coil causes on the ground terminal of the secondary lead wires plate on the base down from vertical secondary lead wires shielded-plate tube; It is characterized in that local discharge sensor (4) is installed in the secondary lead wires shielded-plate tube (5) that is arranged in the insulator place, the output signal line of local discharge sensor is along the dedicated terminals that causes the secondary lead wires plate (6) on the base in the secondary lead wires shielded-plate tube down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203744797U CN202404198U (en) | 2011-09-30 | 2011-09-30 | Utra-high-frequency partial discharge detection device of SF6 current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203744797U CN202404198U (en) | 2011-09-30 | 2011-09-30 | Utra-high-frequency partial discharge detection device of SF6 current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202404198U true CN202404198U (en) | 2012-08-29 |
Family
ID=46701838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203744797U Expired - Lifetime CN202404198U (en) | 2011-09-30 | 2011-09-30 | Utra-high-frequency partial discharge detection device of SF6 current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202404198U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308836A (en) * | 2013-05-27 | 2013-09-18 | 河南省电力公司鹤壁供电公司 | Method, device and system for monitoring insulating property of electronic transformer |
| CN103336225A (en) * | 2013-04-09 | 2013-10-02 | 许继集团有限公司 | Insulating property online monitoring device for electronic transformer |
| CN110988610A (en) * | 2019-11-07 | 2020-04-10 | 国网河北省电力有限公司电力科学研究院 | Novel inverted current transformer, insulation detection method and detection device |
| CN111273137A (en) * | 2020-02-21 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
-
2011
- 2011-09-30 CN CN2011203744797U patent/CN202404198U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336225A (en) * | 2013-04-09 | 2013-10-02 | 许继集团有限公司 | Insulating property online monitoring device for electronic transformer |
| CN103308836A (en) * | 2013-05-27 | 2013-09-18 | 河南省电力公司鹤壁供电公司 | Method, device and system for monitoring insulating property of electronic transformer |
| CN103308836B (en) * | 2013-05-27 | 2015-08-12 | 国家电网公司 | To the methods, devices and systems that the insulating property of electronic mutual inductor are monitored |
| CN110988610A (en) * | 2019-11-07 | 2020-04-10 | 国网河北省电力有限公司电力科学研究院 | Novel inverted current transformer, insulation detection method and detection device |
| CN111273137A (en) * | 2020-02-21 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
| CN111273137B (en) * | 2020-02-21 | 2022-08-05 | 国网河北省电力有限公司电力科学研究院 | Inverted current transformer and partial discharge detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |