CN210015187U - Capacitive TEV sensor applied to GIS partial discharge detection - Google Patents
Capacitive TEV sensor applied to GIS partial discharge detection Download PDFInfo
- Publication number
- CN210015187U CN210015187U CN201920728630.9U CN201920728630U CN210015187U CN 210015187 U CN210015187 U CN 210015187U CN 201920728630 U CN201920728630 U CN 201920728630U CN 210015187 U CN210015187 U CN 210015187U
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- shell
- partial discharge
- copper sheet
- lower shell
- gis partial
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- 239000010949 copper Substances 0.000 claims abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000005684 electric field Effects 0.000 claims abstract description 5
- 229920006335 epoxy glue Polymers 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The utility model discloses a capacitance type TEV sensor applied to GIS partial discharge detection, which comprises a closed shell and an output connector arranged on the shell; the shell comprises a lower shell and an upper cover body, the lower shell is of a cavity structure and is divided into a middle detection area and an edge area, an induction device for detecting GIS partial discharge signals is arranged in the detection area, the induction device comprises an induction copper sheet and a voltage division capacitor, the induction copper sheet is arranged in a manner of being tightly attached to the inner wall of the lower shell, the induction copper sheet is connected with the input end of the output connector, and the voltage division capacitor is arranged between the input end of the output connector and the grounding end; an electric field shielding layer is arranged at the edge of the inner wall of the detection area; magnets are arranged at the four corners of the edge area; the interior of the lower shell is encapsulated by epoxy glue, and the upper cover body covers the upper end face of the lower shell. The utility model discloses measuring method is simple, fault location is accurate, the interference killing feature is strong.
Description
Technical Field
The utility model belongs to GIS partial discharge detection area, concretely relates to be applied to capacitanc TEV sensor that GIS partial discharge detected.
Background
GIS (gas insulated switchgear) refers to a gas insulated totally-enclosed switchgear, which comprises a circuit breaker, an isolating switch, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, wherein all the parts are enclosed in a metal grounded shell; the GIS is filled with SF6 insulating gas with certain pressure, so that the GIS is also called as an SF6 fully-closed combined electrical appliance. Partial discharge is a main symptom of GIS failure, and detection of the partial discharge is an effective way for evaluating GIS equipment and is also one of key technologies for realizing GIS state maintenance. The method comprises the steps of measuring temporary Earth state electric waves (TEV) generated on a metal shell of a GIS due to partial discharge in the GIS on line, and detecting whether insulation faults exist in the GIS, namely, the TEV measuring method.
Among the existing TEV sensors, the capacitive TEV sensor is widely applied; at present, capacitanc TEV sensor is when measuring, and the installation is comparatively inconvenient, and the measurement process is loaded down with trivial details, and the location is inaccurate, and work efficiency is low, and the reliability is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the problem that above-mentioned exists with not enough, provide a be applied to capacitanc TEV sensor that GIS partial discharge detected, measuring method is simple and convenient, fault location is accurate, the interference killing feature is strong.
In order to realize the purpose, the utility model discloses a technical scheme is: a capacitance type TEV sensor applied to GIS partial discharge detection comprises a closed shell and an output connector arranged on the shell; the shell comprises a lower shell and an upper cover body, the lower shell is of a cavity structure and is divided into a middle detection area and an edge area, an induction device for detecting GIS partial discharge signals is arranged in the detection area, the induction device comprises an induction copper sheet and a voltage division capacitor, the induction copper sheet is arranged in a manner of being tightly attached to the inner wall of the lower shell, the induction copper sheet is connected with the input end of the output connector, and the voltage division capacitor is arranged between the input end of the output connector and the grounding end; an electric field shielding layer is arranged at the edge of the inner wall of the detection area; magnets are arranged at the four corners of the edge area; the interior of the lower shell is encapsulated by epoxy glue, and the upper cover body covers the upper end face of the lower shell.
Further perfecting the technical scheme, the induction copper sheet is a circular copper sheet, the size of the copper sheet is phi 38 x 0.5mm, and the equivalent capacitance value is 30 pF.
Further, the capacitance value of the voltage division capacitor is 33 pF.
Furthermore, the shell is of a square structure and is made of POM plastic materials.
Further, the output connector adopts a Q9 connector.
The utility model has the advantages that: the utility model adopts the capacitance TEV sensor, which can effectively measure the partial discharge of the GIS, and the device has good shielding effect and strong anti-interference ability; simultaneously, set up magnet in the inside of device, the signal is put in the outer surface measurement office that only needs hug closely GIS in the measurement process, and this device can adsorb at GIS's surface, measures simple and conveniently, and can detect GIS surface everywhere office through the position that removes this device during the measurement and put the signal to put the signal according to the office of present point and carry out accurate fault location.
Drawings
FIG. 1 is a view of the structure of the lower case of the present invention;
FIG. 2 is a structural view of the upper cover body of the present invention;
FIG. 3 is an equivalent circuit diagram of the present invention;
wherein, 1, a lower shell; 2. an upper cover body; 3. an output connector; 4. mounting holes;
11. detecting a region; 12. an edge region; 111. an induction copper sheet; 112. a voltage-dividing capacitor; 113. an electric field shielding layer; 121. and a magnet.
Detailed Description
In order to make the disclosure of the present invention clearer, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings. It should be noted that for the sake of clarity, the figures and the description omit representation and description of parts not relevant to the present invention, known to a person skilled in the art.
Example 1:
the utility model provides a pair of be applied to GIS partial discharge detection's capacitanc TEV sensor, as shown in fig. 1, 2 and 3, connect 3 including confined shell and the output that sets up on the shell. The shell is made of POM plastic materials, the shell is of a square structure, and the size of the shell is 61 × 59 × 22 (the length is 61mm, the width is 59mm, and the height is 22 mm). The output connector 3 adopts a Q9 connector.
The shell comprises a lower shell 1 and an upper cover body 2, the lower shell 1 is of a cavity structure and is divided into a middle detection area 11 and an edge area 12, an induction device for detecting GIS partial discharge signals is arranged in the detection area 11, the induction device comprises an induction copper sheet 111 and a voltage division capacitor 112, the induction copper sheet 111 is a circular copper sheet, the size of the copper sheet is phi 38 x 0.5mm (the diameter is 38mm, and the thickness is 0.5mm), and the induction copper sheet 111 is tightly attached to the inner wall of the lower shell 1; the induction copper sheet 111 is connected with the input end of the output connector 3, and the voltage division capacitor 112 is arranged between the input end of the output connector 3 and the grounding end; in this embodiment, the equivalent capacitance C1 of the sensing copper sheet 111 is 30pF, and the capacitance of the voltage-dividing capacitor 112 is 33 pF. An electric field shielding layer 113 is arranged at the edge of the inner wall of the detection area 11 and used for shielding external interference; the magnets 121 are arranged at four corners of the edge region 12, so that the device is convenient to measure and use. The interior of the lower shell 1 is encapsulated by epoxy glue, and the upper cover body 2 covers the upper end face of the lower shell 1; the edge of the upper end face of the lower shell 1 and the edge of the upper cover body 2 are correspondingly provided with mounting holes 4, and the lower shell 1 and the upper cover body 2 are fixedly connected through bolts.
The working frequency band of the utility model is 3MHz-80MHz, and the working temperature is-40 ℃ to 85 ℃.
The utility model discloses a theory of operation: when GIS generates partial discharge, the electromagnetic wave signal generated by the partial discharge can be transferred from the inner surface to the outer surface of the metal cabinet body and generates transient earth voltage on the outer surface of the metal cabinet body; during measurement, the rear end face of the lower shell 1 of the device is in close contact with the outer surface of the metal cabinet body, the induction copper sheet 111 and the insulating layer on the surface of the metal cabinet body form capacitive coupling, an electromagnetic pulse signal on the surface of the metal cabinet body is received and coupled to the voltage division capacitor C2, and then a detection signal is output to the oscilloscope through the output connector 3.
The above description is only intended to illustrate embodiments of the present invention, and the description is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. A capacitance type TEV sensor applied to GIS partial discharge detection comprises a closed shell and an output connector arranged on the shell; the method is characterized in that: the shell comprises a lower shell and an upper cover body, the lower shell is of a cavity structure and is divided into a middle detection area and an edge area, an induction device for detecting GIS partial discharge signals is arranged in the detection area, the induction device comprises an induction copper sheet and a voltage division capacitor, the induction copper sheet is arranged in a manner of being tightly attached to the inner wall of the lower shell, the induction copper sheet is connected with the input end of the output connector, and the voltage division capacitor is arranged between the input end of the output connector and the grounding end; an electric field shielding layer is arranged at the edge of the inner wall of the detection area; magnets are arranged at the four corners of the edge area; the interior of the lower shell is encapsulated by epoxy glue, and the upper cover body covers the upper end face of the lower shell.
2. The capacitive TEV sensor applied to GIS partial discharge detection as claimed in claim 1, wherein: the inductive copper sheet is a circular copper sheet, the size of the copper sheet is phi 38 x 0.5mm, and the equivalent capacitance value is 30 pF.
3. The capacitive TEV sensor applied to GIS partial discharge detection as claimed in claim 1, wherein: the capacitance value of the voltage dividing capacitor is 33 pF.
4. The capacitive TEV sensor applied to GIS partial discharge detection as claimed in claim 1, wherein: the shell is of a square structure and is made of POM plastic materials.
5. The capacitive TEV sensor applied to GIS partial discharge detection as claimed in claim 1, wherein: the output connector adopts a Q9 connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920728630.9U CN210015187U (en) | 2019-05-21 | 2019-05-21 | Capacitive TEV sensor applied to GIS partial discharge detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920728630.9U CN210015187U (en) | 2019-05-21 | 2019-05-21 | Capacitive TEV sensor applied to GIS partial discharge detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210015187U true CN210015187U (en) | 2020-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920728630.9U Expired - Fee Related CN210015187U (en) | 2019-05-21 | 2019-05-21 | Capacitive TEV sensor applied to GIS partial discharge detection |
Country Status (1)
| Country | Link |
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| CN (1) | CN210015187U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557855A (en) * | 2020-12-23 | 2021-03-26 | 武汉华威众科电力有限公司 | On-line partial discharge shielding type sensor and implementation method thereof |
-
2019
- 2019-05-21 CN CN201920728630.9U patent/CN210015187U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557855A (en) * | 2020-12-23 | 2021-03-26 | 武汉华威众科电力有限公司 | On-line partial discharge shielding type sensor and implementation method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| 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: 20200204 |