CN103472374A - Online GIS (gas insulated switchgear) partial discharge monitoring device - Google Patents
Online GIS (gas insulated switchgear) partial discharge monitoring device Download PDFInfo
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- CN103472374A CN103472374A CN2013103805915A CN201310380591A CN103472374A CN 103472374 A CN103472374 A CN 103472374A CN 2013103805915 A CN2013103805915 A CN 2013103805915A CN 201310380591 A CN201310380591 A CN 201310380591A CN 103472374 A CN103472374 A CN 103472374A
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Abstract
The invention relates to an online GIS (gas insulated switchgear) partial discharge monitoring device. The online GIS partial discharge monitoring device at least comprises a GIS housing and a conductive rod on the GIS housing, a disc insulator is arranged on the GIS housing, an electrode is pre-buried near the grounding end in the disc insulator, detection impedance is connected with the electrode and the GIS housing, and is connected with a high-pass filtration and amplification device and then with a monitor capable of detecting GIS partial discharge signals through a shaping circuit. The online GIS partial discharge monitoring device has the advantages of simple mechanism, convenience and reliability in use, good anti-interference performance and high sensitivity.
Description
Technical field
What the present invention relates to is a kind of GIS local discharge on-line monitoring device, belongs to the device security monitoring technical field of transformer station.
Background technology
Using the Cubicle Gas-Insulated Switchgear (GIS) of SF6 as insulating medium, also claim totally enclosed type combined electrical apparatus and gas insulated transformer substation, by the electrical equipment except transformer in transformer station, comprise that short-circuiting device, disconnector, grounding switch, current transformer, voltage transformer (VT), bus and outlet casing tube etc. all are encapsulated in the metal shell of ground connection, in shell, fill using 0.3-0.4Mpa SF6 gas as the insulation and arc-extinguishing medium.
The safe operation of GIS is most important to stablizing of whole electric system, once break down, will cause jurisdiction some areas and even all area power failures.Because GIS is large-scale closed composition structural system, except needs drop into a large amount of manpower and materials, also need the servicing time of growing during interruption maintenance, this will cause great loss to national economy; So, before GIS breaks down, if can detect and judge the internal defects situation, just seem particularly important.
Shelf depreciation is the inner tendency phenomenon that insulation breakdown occurs of GIS, and occurrence cause is usually: casting insulation inside exists cavity or impurity; Metal or insulating surface have tip or projection; Owing to installing accidentally or switch deciliter generation graininess or thread metal particle; these particulates can be attached to insulating surface or drop on outer casing bottom; metal particle constantly mobile or irregular jump under electric field action at outer casing bottom; when soaring, metallic particles can, with electric charge, during whereabouts, can produce shelf depreciation; Shelf depreciation occurs in metallic shield between contact.
Shelf depreciation is a breakneck signal for GIS equipment, once slight shelf depreciation occur, as got rid of not in time, will cause serious insulation breakdown, causes serious consequence.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, and provide a kind of simple in structure, easy to use and reliable, good in anti-interference performance, highly sensitive GIS local discharge on-line monitoring device.
The objective of the invention is to complete by following technical solution, described a kind of GIS local discharge on-line monitoring device, which comprises at least a GIS shell and the conducting rod on this GIS shell, and be provided with disc insulator on described GIS shell, near the earth terminal pre-plugged, an electrode is arranged in described disc insulator, pick out one and detect impedance between described electrode and GIS shell, this detects impedance by after connecting a high-pass filtering and amplifier, then can detect the monitor of GIS local discharge signal by a shaping circuit connection one.
The present invention carries out effective shelf depreciation to GIS equipment to carry out on-line monitoring, can realize fault pre-alarming, and the hidden danger of fixing a breakdown is in advance effectively guaranteed power supply reliability and saved a large amount of manpower and materials; Have simple in structure, easy to use and reliable, good in anti-interference performance, highly sensitive.
The accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail: shown in Fig. 1, a kind of GIS local discharge on-line monitoring device of the present invention, which comprises at least a GIS shell 1 and the conducting rod 2 on this GIS shell, and be provided with disc insulator 3 on described GIS shell 1, described disc insulator 3 is interior has an electrode 4 near the earth terminal pre-plugged, pick out one and detect impedance 5 between described electrode 4 and GIS shell 1, this detects impedance 5 by after connecting a high-pass filtering and amplifier 6, can detect again the monitor 8 of GIS local discharge signal by shaping circuit 7 connections one.
The present invention buries an electrode underground on the disc insulator of GIS shell, form electric capacity at this electrode and shell, extract the pulse signal of shelf depreciation with this capacitive transducer, and amplify and detect to obtain local discharge signal in GIS by signal, its advantage is good in anti-interference performance, highly sensitive, can detect the shelf depreciation of 5 pC.
Claims (1)
1. a GIS local discharge on-line monitoring device, which comprises at least a GIS shell and the conducting rod on this GIS shell, and be provided with disc insulator on described GIS shell, it is characterized in that near the earth terminal pre-plugged, an electrode being arranged in described disc insulator, pick out one and detect impedance between described electrode and GIS shell, this detects impedance by after connecting a high-pass filtering and amplifier, then can detect the monitor of GIS local discharge signal by a shaping circuit connection one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103805915A CN103472374A (en) | 2013-08-28 | 2013-08-28 | Online GIS (gas insulated switchgear) partial discharge monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103805915A CN103472374A (en) | 2013-08-28 | 2013-08-28 | Online GIS (gas insulated switchgear) partial discharge monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103472374A true CN103472374A (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103805915A Pending CN103472374A (en) | 2013-08-28 | 2013-08-28 | Online GIS (gas insulated switchgear) partial discharge monitoring device |
Country Status (1)
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| CN (1) | CN103472374A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459492A (en) * | 2014-12-12 | 2015-03-25 | 国家电网公司 | Partial discharge detection device and detection method for power cable voltage-withstand test |
| CN107356849A (en) * | 2017-08-25 | 2017-11-17 | 广州供电局有限公司 | Supporting insulator local discharge detection device and method in gas-insulated switch |
| CN110108988A (en) * | 2019-05-08 | 2019-08-09 | 国电南瑞科技股份有限公司 | A kind of substation's type insulation monitoring system and method based on EMTC |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0984289A1 (en) * | 1997-05-21 | 2000-03-08 | Hitachi, Ltd. | Partial discharge detector of gas-insulated apparatus |
| JP2008216145A (en) * | 2007-03-06 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Partial discharge detection method |
| JP2009020008A (en) * | 2007-07-12 | 2009-01-29 | Mitsubishi Electric Corp | Insulation monitoring device for gas insulation equipment |
| CN102305903A (en) * | 2011-06-03 | 2012-01-04 | 云南电力试验研究院(集团)有限公司 | Partial discharge detection method for pulse current of electrified operation single phase integrated gas insulated switchgear (GIS) |
| CN203502546U (en) * | 2013-08-28 | 2014-03-26 | 国家电网公司 | GIS partial discharging on-line monitoring device |
-
2013
- 2013-08-28 CN CN2013103805915A patent/CN103472374A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0984289A1 (en) * | 1997-05-21 | 2000-03-08 | Hitachi, Ltd. | Partial discharge detector of gas-insulated apparatus |
| JP2008216145A (en) * | 2007-03-06 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Partial discharge detection method |
| JP2009020008A (en) * | 2007-07-12 | 2009-01-29 | Mitsubishi Electric Corp | Insulation monitoring device for gas insulation equipment |
| CN102305903A (en) * | 2011-06-03 | 2012-01-04 | 云南电力试验研究院(集团)有限公司 | Partial discharge detection method for pulse current of electrified operation single phase integrated gas insulated switchgear (GIS) |
| CN203502546U (en) * | 2013-08-28 | 2014-03-26 | 国家电网公司 | GIS partial discharging on-line monitoring device |
Non-Patent Citations (1)
| Title |
|---|
| 刘勋等: "GIS局部放电在线监测技术的综合分析", 《电气应用》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459492A (en) * | 2014-12-12 | 2015-03-25 | 国家电网公司 | Partial discharge detection device and detection method for power cable voltage-withstand test |
| CN107356849A (en) * | 2017-08-25 | 2017-11-17 | 广州供电局有限公司 | Supporting insulator local discharge detection device and method in gas-insulated switch |
| CN107356849B (en) * | 2017-08-25 | 2023-12-05 | 广东电网有限责任公司广州供电局 | Partial discharge detection device and method for supporting insulator in gas insulated switch |
| CN110108988A (en) * | 2019-05-08 | 2019-08-09 | 国电南瑞科技股份有限公司 | A kind of substation's type insulation monitoring system and method based on EMTC |
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| ASS | Succession or assignment of patent right |
Owner name: JIAXING POWER SUPPLY COMPANY, STATE GRID ZHEJIANG Effective date: 20140109 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: JIAXING POWER SUPPLY COMPANY, STATE GRID ZHEJIANG ELECTRIC POWER COMPANY Effective date: 20140109 |
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Free format text: CORRECT: ADDRESS; FROM: 314000 JIAXING, ZHEJIANG PROVINCE TO: 100031 XICHENG, BEIJING |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20140109 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Jiaxing Power Supply Company, State Grid Zhejiang Electronic Power Company Address before: Jiaxing City, Zhejiang province 314000 North Road No. 99 Applicant before: Jiaxing Power Supply Company, State Grid Zhejiang Electronic Power Company |
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20131225 |