CN104459495A - Installation method and structure for external sensor used for detecting sleeve partial discharge - Google Patents
Installation method and structure for external sensor used for detecting sleeve partial discharge Download PDFInfo
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- CN104459495A CN104459495A CN201410787729.8A CN201410787729A CN104459495A CN 104459495 A CN104459495 A CN 104459495A CN 201410787729 A CN201410787729 A CN 201410787729A CN 104459495 A CN104459495 A CN 104459495A
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Abstract
The invention discloses an installation method and structure for an external sensor used for detecting sleeve partial discharge. The sensor is installed externally to detect electromagnetic waves irradiated at a metal flange gap, so that partial discharge in a sleeve is measured. The installation structure is simple in composition, the installation method is easy to realize, and outside signal interference can be effectively avoided; the sensor based on the installation method and structure can achieve high detection sensitivity, meet the requirement for detection of partial discharge signals and avoid multiple problems caused by an existing built-in sensor.
Description
Technical field
The present invention relates to a kind of signal supervisory instrument installation method and mounting structure, particularly relate to a kind of pick-up unit installation method and mounting structure of local discharge signal.
Background technology
Sleeve pipe is one of most important annex of transformer.It not only guides to the high and low pressure of inside transformer outside fuel tank, realizes, with the connection of external network, also playing a part anchor leg simultaneously.The ratio that the failure rate of sleeve pipe accounts for whole Accident of Transformer rate increases year by year, and particularly the capacitor core of sleeve pipe is once occur that the accidents such as shelf depreciation will cause blast, very easily causes transformer to catch fire, and this is very dangerous.Therefore be necessary to detect the partial discharge phenomenon of sleeve pipe.
The current conventional mounting means of partial discharge of transformer on-line checkingi has three kinds: 1. fuel outlet valve mounting means, sensor is goed deep in transformer oil through after fuel outlet valve, this method can affect the effect of draining the oil, especially directly can not install at emergency oil discharge valve, and transformer bottom oil pressure is higher, during installation, leakage of oil will be prevented; 2. people's (hand) hole mounting means, probe is arranged on transformer people (hand) blind patch, implement in overhaul or when draining the oil and process, people's (hand) hole site is generally in transformer bottom and the position that in structure, people can enter smoothly, therefore be also beneficial to sensor installation, hand hole is generally in the lower end of big current sleeve pipe or current transformer outlet position, safe not for measurement; 3. prefabrication system, windows and the prefabrication system of prefabricated probe in body proper site before transformer dispatches from the factory, and this mode preferably but could can only realize when ordering goods design.Utilize the Luo-coil be sleeved on end shield ground wire to detect shelf depreciation, but this method is inevitably subject to the interference that earth point seals in, and utilizes external sensor to address this problem.Visible, sleeve pipe is due to the singularity of its structure, and built-in sensor not easily realizes, and there is various problems, needs to adopt external sensor.The installation how realizing external sensor is a difficult point.
Summary of the invention
For the above state of the art, for realizing the goal of the invention of above-mentioned installation external sensor, this patent provides a kind of external sensor installation method and mounting structure of detection thimble shelf depreciation.Its main measuring principle is: when bushing shell for transformer generation partial discharge phenomenon, the gap at the metal flange place of sleeve pipe can give off electromagnetic wave, this electromagnetic wave reflects the situation of sleeve pipe shelf depreciation, detects this electromagnetic wave, just can realize the measurement to shelf depreciation.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of installation method of external sensor of detection thimble shelf depreciation, described installation method comprises the step be installed on by sensor in a metal case, described metal case is installed on the step at the metal flange place of sleeve pipe, and a metal mask tape to be connected with the left and right sides of described metal case and around the step on the metal flange being fixed on sleeve pipe, wherein, the trailing flank of described metal case and described metal mask tape combine and achieve holding around described metal flange, and the trailing flank of described metal case is cambered surface, be made up of insulating material, this cambered surface and described metal flange outside surface fit.
Preferably, the left and right sides of described metal case is respectively provided with a buckle respectively, and namely described metal mask tape is realize the connection with the described metal case left and right sides by described buckle.
Preferably, the leading flank of described metal case is provided with a circular hole, and described installation method is also comprised and to be passed in and out by described circular hole by sensor connect lines thus to realize the step of signal transmission.
Accordingly, the invention provides a kind of mounting structure of external sensor of detection thimble shelf depreciation, this mounting structure comprises a metal case and a metal mask tape, wherein, described metal mask tape is connected with the left and right sides of described metal case and around on the metal flange being fixed on sleeve pipe, the trailing flank of described metal case and described metal mask tape combine and achieve holding around described metal flange, and the trailing flank of described metal case is cambered surface, be made up of insulating material, this cambered surface and described metal flange outside surface fit.
Preferably, the left and right sides of described metal case is respectively provided with a buckle respectively, and described buckle is for connecting the two ends of described metal mask tape.
Preferably, the leading flank of described metal case is provided with a circular hole, for the turnover of sensor connect lines.
In the present invention, mounting structure composition is simple, installation method is easy to realize, and can effectively avoid outer signals to disturb, sensor based on installation method in the present invention and mounting structure can realize higher detection sensitivity, meet the testing requirement to local discharge signal, the various problems that existing built-in sensor is brought can be avoided.
Accompanying drawing explanation
Fig. 1 is the mounting structure schematic diagram of the external sensor of detection thimble shelf depreciation in the present invention;
Fig. 2 is the concrete mounting means schematic diagram of the external sensor of detection thimble shelf depreciation in the present invention.
Embodiment
Below in conjunction with specific embodiment, above-mentioned external installation method and mounting structure are further explained.
As shown in Figure 1, this mounting structure comprises box body and metal mask tape, wherein, sensing element is positioned at box body, the box body left and right sides is respectively equipped with a buckle, the two ends of metal mask tape realize the connection with box body both sides by two buckles, the trailing flank of described box body and described metal mask tape combine and achieve holding around described metal flange, in order to realize the electromagnetic measurement in metal flange gap place, and avoid the interference of external signal, this box body is metal case, and the trailing flank of described metal case is insulating material makes, in order to improve the accuracy of detection further, arranging described trailing flank is can to fit the cambered surface contacted with metal flange outside surface.When bushing shell for transformer produces partial discharge phenomenon, the gap place of the flange of sleeve pipe can give off electromagnetic wave, and this electromagnetic wave has reacted the situation of shelf depreciation.In this mounting structure, described electromagnetic wave is passed to sensing element through the trailing flank of metal case, sensing element detects this electromagnetic wave, thus the detection obtained shelf depreciation, simultaneously, due to the existence of metal mask tape and metal case, can effectively avoid external signal to disturb, realize Measurement accuracy.
For microstrip antenna as sensing element, microstrip antenna is placed in this metal case, 50 Ω coaxial cables are connected microstrip antenna by circular hole, and drawn by the local discharge signal recorded, metal case is installed on casing metal flange.There are two buckles metal case both sides, for fixing metal mask tape.First metal mask tape one end is fixed on the buckle of the side of metal case, after being wound around metal flange one circle, the other end of metal mask tape is fixed on the buckle of the opposite side of box body.Concrete scheme of installation as shown in Figure 2.Solid and reliable through this installation method of checking, and can local discharge signal be detected.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (6)
1. the installation method of the external sensor of a detection thimble shelf depreciation, it is characterized in that: preferred, described installation method comprises the step be installed on by sensor in a metal case, described metal case is installed on the step at the metal flange place of sleeve pipe, and a metal mask tape to be connected with the left and right sides of described metal case and around the step on the metal flange being fixed on sleeve pipe, wherein, the trailing flank of described metal case and described metal mask tape combine and achieve holding around described metal flange, and the trailing flank of described metal case is cambered surface, be made up of insulating material, this cambered surface and described metal flange outside surface fit.
2. the installation method of the external sensor of a kind of detection thimble shelf depreciation according to claim 1, it is characterized in that, the left and right sides of described metal case is respectively provided with a buckle respectively, and namely described metal mask tape is realize the connection with the described metal case left and right sides by described buckle.
3. the installation method of the external sensor of a kind of detection thimble shelf depreciation according to claim 1, it is characterized in that, the leading flank of described metal case is provided with a circular hole, and described installation method is also comprised and to be passed in and out by described circular hole by sensor connect lines thus to realize the step of signal transmission.
4. the mounting structure of the external sensor of a detection thimble shelf depreciation, it is characterized in that: this mounting structure comprises a metal case and a metal mask tape, wherein, described metal mask tape is connected with the left and right sides of described metal case and around on the metal flange being fixed on sleeve pipe, the trailing flank of described metal case and described metal mask tape combine and achieve holding around described metal flange, and the trailing flank of described metal case is cambered surface, be made up of insulating material, this cambered surface and described metal flange outside surface fit.
5. the mounting structure of the external sensor of a kind of detection thimble shelf depreciation according to claim 5, is characterized in that, the left and right sides of described metal case is respectively provided with a buckle respectively, and described buckle is for connecting the two ends of described metal mask tape.
6. the mounting structure of the external sensor of a kind of detection thimble shelf depreciation according to claim 5, is characterized in that, the leading flank of described metal case is provided with a circular hole, for the turnover of sensor connect lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787729.8A CN104459495B (en) | 2014-12-17 | 2014-12-17 | A kind of installation method and structure of the external sensor for detecting sleeve pipe shelf depreciation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787729.8A CN104459495B (en) | 2014-12-17 | 2014-12-17 | A kind of installation method and structure of the external sensor for detecting sleeve pipe shelf depreciation |
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| Publication Number | Publication Date |
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| CN104459495A true CN104459495A (en) | 2015-03-25 |
| CN104459495B CN104459495B (en) | 2018-01-16 |
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| CN201410787729.8A Active CN104459495B (en) | 2014-12-17 | 2014-12-17 | A kind of installation method and structure of the external sensor for detecting sleeve pipe shelf depreciation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467286A (en) * | 2015-12-21 | 2016-04-06 | 许继（厦门）智能电力设备股份有限公司 | Local discharge detection device |
| CN113281586A (en) * | 2021-04-25 | 2021-08-20 | 武汉伊莱维特电力科技有限公司 | Real-time monitoring device for electrical equipment partial discharge detection equipment |
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| CN102183711A (en) * | 2011-03-15 | 2011-09-14 | 辽宁省电力有限公司阜新供电公司 | Local discharge detection device in running state of high-voltage combined electric appliance |
| CN202256589U (en) * | 2011-10-10 | 2012-05-30 | 上海莫克电子技术有限公司 | External sensor detecting discharging signal of GIS device |
| CN202421423U (en) * | 2011-12-07 | 2012-09-05 | 宁波理工监测科技股份有限公司 | Gas insulated switchgear (GIS) partial discharge detection device for shielding insulation basin |
| CN202421424U (en) * | 2011-12-07 | 2012-09-05 | 宁波理工监测科技股份有限公司 | Partial discharge detection device |
| CN202583399U (en) * | 2012-05-14 | 2012-12-05 | 杭州西湖电子研究所 | Combined device formed by ultrahigh frequency sensor and shielding soft base of sensor |
| CN204374362U (en) * | 2014-12-17 | 2015-06-03 | 广西电网公司电力科学研究院 | A kind of external sensor mounting structure of detection thimble shelf depreciation |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2697662Y (en) * | 2003-12-18 | 2005-05-04 | 西安交通大学 | Local discharge detection sensor for ultraviolet frequency band |
| WO2010130671A1 (en) * | 2009-05-13 | 2010-11-18 | Areva T&D Sas | Partial discharge detection device capable of determining the external or internal origin of a partial discharge, and associated method |
| CN102183711A (en) * | 2011-03-15 | 2011-09-14 | 辽宁省电力有限公司阜新供电公司 | Local discharge detection device in running state of high-voltage combined electric appliance |
| CN202256589U (en) * | 2011-10-10 | 2012-05-30 | 上海莫克电子技术有限公司 | External sensor detecting discharging signal of GIS device |
| CN202421423U (en) * | 2011-12-07 | 2012-09-05 | 宁波理工监测科技股份有限公司 | Gas insulated switchgear (GIS) partial discharge detection device for shielding insulation basin |
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| CN202583399U (en) * | 2012-05-14 | 2012-12-05 | 杭州西湖电子研究所 | Combined device formed by ultrahigh frequency sensor and shielding soft base of sensor |
| CN204374362U (en) * | 2014-12-17 | 2015-06-03 | 广西电网公司电力科学研究院 | A kind of external sensor mounting structure of detection thimble shelf depreciation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467286A (en) * | 2015-12-21 | 2016-04-06 | 许继（厦门）智能电力设备股份有限公司 | Local discharge detection device |
| CN113281586A (en) * | 2021-04-25 | 2021-08-20 | 武汉伊莱维特电力科技有限公司 | Real-time monitoring device for electrical equipment partial discharge detection equipment |
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| Publication number | Publication date |
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| CN104459495B (en) | 2018-01-16 |
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