CN104898003A - Built-in disc type sensor - Google Patents
Built-in disc type sensor Download PDFInfo
- Publication number
- CN104898003A CN104898003A CN201510347661.6A CN201510347661A CN104898003A CN 104898003 A CN104898003 A CN 104898003A CN 201510347661 A CN201510347661 A CN 201510347661A CN 104898003 A CN104898003 A CN 104898003A
- Authority
- CN
- China
- Prior art keywords
- sensor
- disk electrode
- dielectric layer
- mentioned
- sensor according
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The application provides a built-in disc type sensor comprising a dielectric layer, a disc electrode, a feed rod and at least two bolts; the disc electrode is grounded through the bolts. The sensor uses the two grounding bolts to directly ground the disc electrode, and grounding impedance is zero, thus realizing reliable grounding, and removing danger conditions brought by overvoltage.
Description
Technical field
The application relates to sensor field, in particular to the built-in collar plate shape sensor of one.
Background technology
Superfrequency sensor (UHF Sensor) is for responding to SF
6the superfrequency electromagnetic wave that gas-insulated switchgear (Ggs Insulated Swichgear) sends is the critical component of GIS detection system.
According to the difference of mounting means, superfrequency sensor can be divided into external and built-in two kinds.External sensor is placed on the flange of GIS disc insulator, receive the electromagnetic wave leaked out from here, this sensor cost is low, easy to use, do not affect the structure of GIS, can be used for the live detection of GIS, but shortcoming is the impact being easily subject to free surrounding space electromagnetic interference (EMI), and cannot use for the GIS (as the GIS that SIEMENS company produces) of disc insulator flange band metallic shield.Built-in sensor is then that be arranged on the hand hole of GIS inside, medium window place, or direct pouring is in disc insulator, its impact being not easy to be subject to free surrounding space electromagnetic interference (EMI) has more advantage under the prerequisite not affecting the distribution of GIS internal electric field.
Built-in sensor comprises multiple, common type has collar plate shape, semicircle dipole-type, logarithm period type, plane equiangular spiral type, Archimedean screw, dipole-type etc., collar plate shape sensor because its structure is simple, reliable, cost of manufacture is lower, security is high, and detection sensitivity is relatively high, become the preferred of external GIS manufacturer.
The electrode of collar plate shape sensor is metal material, cast in epoxy material inside directly to reach afterwards in the middle of GIS inner plenum, if this electrode suspends or impedance ground is comparatively large, then according to capacitive divider principle, the metal electrode of sensor can be got the power-frequency voltage that tens volts are even gone up kilovolt.And be that in Lightning Over-voltage and switching overvoltage situation, overvoltage level herein can be higher.
The method of the external protection terminal of employing that the sensor of the external development of current application has, the method feeds out interface at signal and connects a T connector, a termination protective device, and one end is that signal feeds out interface.But the method shortcoming just loses protection when external protection terminal is dismantled for some reason, and complex structure.Another guard method of external employing is that resistance is generally several ohm to tens ohm, and the impedance ground of the method is still higher, still dangerous under over-voltage condition by small resistor or little hollow inductance ground connection.
In order to improve the reliability of collar plate shape sensor, avoiding the generation of the dangerous situation caused during superpotential, needing a kind of collar plate shape sensor of overvoltage protection badly.
Summary of the invention
The application aims to provide a kind of built-in collar plate shape sensor, to solve the low problem of collar plate shape sensor reliability of the prior art.
To achieve these goals, according to an aspect of the application, provide a kind of built-in collar plate shape sensor, this sensor comprises metal base plate, dielectric layer, disk electrode, feeder pillar and at least two bolts, and above-mentioned disk electrode is by above-mentioned bolt ground connection.
Further, the sensor comprises four above-mentioned bolts, and four above-mentioned bolts are arranged in four through holes of above-mentioned disk electrode, and four above-mentioned through holes are equal with the distance in the center of circle of said disk electrode.
Further, the diameter of above-mentioned disk electrode is between 130 ~ 150mm.
Further, the thickness of above-mentioned disk electrode is between 12 ~ 17mm.
Further, the thickness of above-mentioned dielectric layer is between 30mm ~ 40mm.
Further, the material of above-mentioned dielectric layer is epoxy material.
Further, the installation window internal diameter of the sensor is not less than 200mm.
Further, above-mentioned feeder pillar is arranged on the home position of above-mentioned disk electrode.
Further, above-mentioned metal base plate, dielectric layer, above-mentioned disk electrode, above-mentioned feeder pillar and above-mentioned bolt are processed into integrative-structure by integral cast.
Further, above-mentioned metal base plate is provided with O-ring seal.
The technical scheme of application the application, adopts two earth studs being arranged on collar plate shape sensor by direct for disk electrode ground connection, makes impedance ground be zero, achieve the reliable object of collar plate shape sensor ground, eliminate the dangerous situation that superpotential is brought.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present application, and the schematic description and description of the application, for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 shows the cross-sectional view of the built-in collar plate shape sensor that a kind of exemplary embodiment of the application provides;
Fig. 2 shows the stereographic map of the built-in collar plate shape sensor that a kind of preferred embodiment provides;
Fig. 3 shows the simulation result curve that a kind of preferred embodiment provides;
Fig. 4 shows the simulation result curve that a kind of preferred embodiment provides;
Fig. 5 shows the simulation result curve that a kind of preferred embodiment provides;
Fig. 6 shows the simulation result curve that a kind of preferred embodiment provides; And
Fig. 7 shows the simulation result curve that a kind of preferred embodiment provides.
Embodiment
It is noted that following detailed description is all exemplary, be intended to provide further instruction to the application.Unless otherwise, all technology used herein and scientific terminology have the identical meanings usually understood with the application person of an ordinary skill in the technical field.
It should be noted that used term is only to describe embodiment here, and be not intended to the illustrative embodiments of restricted root according to the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to comprise plural form, in addition, it is to be further understood that, " comprise " when using term in this manual and/or " comprising " time, it indicates existing characteristics, step, operation, device, assembly and/or their combination.
Introduce as background technology, the overvoltage protection structure of built-in collar plate shape sensor of the prior art can not eliminate danger situation, in order to solve as above, present applicant proposes a kind of built-in collar plate shape sensor.
In a kind of typical embodiment of the application, as shown in Figure 1, provide a kind of built-in collar plate shape sensor, this sensor comprises: metal base plate 1, dielectric layer 2, disk electrode 3, feeder pillar 6 and at least two bolts 4, and above-mentioned disk electrode 3 is by least two above-mentioned bolt 4 ground connection.
Above-mentioned sensor adopts two earth studs 4 being arranged on device by disk electrode 3 directly ground connection, makes impedance ground be zero, achieves the reliable object of collar plate shape sensing ground connection, eliminate the dangerous situation that superpotential is brought.
In a kind of preferred embodiment of the application, the sensor comprises four above-mentioned bolts, 4, four above-mentioned bolts 4 and is arranged in the through hole of above-mentioned disk electrode 3, and each above-mentioned through hole is equal with the distance in the center of circle of said disk electrode 3, as shown in Figure 2.Bolt 4 not only plays the effect of ground protection, also play connect GIS hand hole metal flange on the effect of disk electrode 3, four bolts 4 are arranged in the through hole of above-mentioned equally distributed disk electrode 3, firm connection function can be played.And these four bolts 4 make sensor strengthen the inhibiting effect of low frequency signal in 0-500MHz low-frequency stop band, thus substantially increase the interference free performance of sensor.
In order to improve the sensitivity of the sensor further, the diameter of the preferred above-mentioned disk electrode 3 of the application is between 130 ~ 150mm, to diameter D be 110mm, 130mm, the sensitivity of the disk electrode of 150mm and 70mm 3 (keep other structural parameters of sensor identical) carries out simulation calculation,, simulation result sensitivity characteristics curve as shown in Figure 3 (i.e. sensitivity height isoeffect curve).
Simulation result shows, along with the diameter of the disk electrode of collar plate shape sensor increases gradually, within the scope of 300MHz ~ 2GHz, the peak value of the response characteristic of sensor moves to low frequency region gradually from high-frequency region, and sensitivity peaks is on a declining curve.Namely when the diameter of sensor disk electrode increases, the sensitivity decrease that sensor strengthens compared with the sensitivity of lower part in frequency and divides in frequency higher part, but frequency is smaller than frequency upper zone sensitivity decrease amplitude compared with low frequency region sensitivity increasing degree.For taking into account sensitivity and size sensor to the impact of installing, the diameter of preferred above-mentioned disk electrode 3 is between 130 ~ 150mm.
In the another kind of preferred embodiment of the application, the thickness of above-mentioned disk electrode 3 is between 12 ~ 17mm.
In the another kind of preferred embodiment of the application, the thickness h of above-mentioned dielectric layer 2 is between 30mm ~ 40mm, choose that dielectric layer 2 thickness is 10mm, 20mm respectively, the sensitivity of the collar plate shape sensor of 30mm and 40mm (sensor other structural parameters identical) carries out simulation calculation, result as shown in Figure 4.
Simulation result shows, along with the increase gradually of dielectric layer 2 thickness of sensor, within the scope of 300MHz ~ 2GHz, the peak value of the response characteristic of sensor moves to low frequency region elevated gradually from high-frequency region.When dielectric layer 2 thickness increases, in the left area (frequency is lower part comparatively) of transducer sensitivity peak value, transducer sensitivity strengthens.And the right area of transducer sensitivity peak value (frequency higher part is divided), when the thickness of dielectric layer 2 increases to 20mm by 10mm, transducer sensitivity increases, but dielectric layer 2 thickness is continuous when increasing, and transducer sensitivity reduces gradually.Therefore, the thickness of dielectric layer 2 is when 30mm ~ 40mm, and the sensitivity of sensor is higher.
In order to improve sensitivity further, and ensure that the life-span of sensor is identical with the life-span of GIS device, the material of the preferred above-mentioned dielectric layer 2 of the application is epoxy material simultaneously.The emulation mode of sampling same analyzes dielectric layer 2 material of collar plate shape sensor to the impact of the sensitivity of sensor, keeps other parameter constant of sensor, chooses the relative dielectric constant ε of dielectric layer 2 material respectively
rbe 2,4,6,8 carry out simulation calculation.Collar plate shape transducer sensitivity characteristic variations as shown in Figure 5.
Simulation result shows, along with the dielectric layer material specific inductive capacity of collar plate shape sensor increases gradually, within the scope of 300MHz ~ 2GHz, the sensory characteristic situation of change of sensor is comparatively complicated.When dielectric layer dielectric constant increases, transducer sensitivity peak value moves to frequency lower region gradually.In the left area (frequency is lower part comparatively) of transducer sensitivity peak value, when frequency is lower, transducer sensitivity increases with specific inductive capacity and reduces, but increases with specific inductive capacity increase along with frequency raises transducer sensitivity gradually.And the right area of transducer sensitivity peak value (frequency higher part is divided), transducer sensitivity has the trend reduced with specific inductive capacity increase, but along with specific inductive capacity increases, there is again the sensitivity peaks that frequency is higher thus drawn high transducer sensitivity in sensor.Therefore can consider that dielectric constant tries one's best high medium as insulating material.Meanwhile, also will consider that dielectric material conventional in selected dielectric material and GIS device is consistent, therefore the application selects the material that epoxy casting insulation inner with GIS is consistent, is preferably epoxy material.
In the another kind of preferred embodiment of the application, the internal diameter of the installation window of preferred the sensor is not less than 200mm.Identical emulation mode is adopted to analyze the installation window of collar plate shape sensor to the impact of its sensitivity.Choosing respectively and installing window D1 size is that 170mm, 200mm, 230mm, 260mm carry out simulation calculation.Collar plate shape transducer sensitivity characteristic variations as shown in Figure 6.
Simulation result shows, within the scope of 300MHz ~ 2GHz, when sensor installation window size becomes large, the sensitivity entirety of sensor is all improved.But along with installation window size is increasing, the increase degree of transducer sensitivity is more and more less, namely when installing window and increasing to certain size, then continue to increase almost constant to transducer sensitivity of window size is installed.Therefore, window is installed and should be not less than 200mm.But the hand hole in fact different electric pressure GIS or the fenestra diameter of sensor installation differ, substantially from tens centimetres to tens centimetres not etc., sensor design also will consider the impact of this respect.
In the another kind of preferred embodiment of the application, as shown in Figure 1, above-mentioned feeder pillar 6 is arranged on the home position of above-mentioned disk electrode 3, and feeder pillar 6 connects with the inner core of sensor signal connecting line (high frequency coaxial line), as the positive pole that sensor signal exports; The screen layer of signal connecting line connects with metal base plate 1, as the earth terminal that signal exports.
In the another kind of preferred embodiment of the application; as Fig. 1 is above-mentioned; above-mentioned metal base plate, disk electrode, above-mentioned dielectric layer 2, above-mentioned feeder pillar 6 are processed into integrative-structure with above-mentioned bolt 4 by integral cast; integral cast mode is adopted to process; significantly can reduce sensor seal complex degree; contribute to protecting Sensor core parts simultaneously, solve round sensor and gas-insulated switchgear life-span conforming problem.
In the another kind of preferred embodiment of the application, as Fig. 1 is above-mentioned, above-mentioned metal base plate 1 is arranged by O-ring seal 7, now only need two seals to design at most, above-mentioned metal base plate 1 is provided with O-ring seal 7, and O-ring seal 7 can prevent the leakage of gas in GIS after sensor installation.
In order to the technical scheme making those skilled in the art clearly can understand the application, below with reference to embodiment and accompanying drawing, the technical scheme to the application is described in detail.
Fig. 1 shows the diagrammatic cross-section of built-in collar plate shape sensor, this sensor comprises metal base plate 1, dielectric layer 2, disk electrode 3, feeder pillar 6 and four bolts 4 (because this figure is diagrammatic cross-section, so two bolts 4 can only be demonstrated), above-mentioned disk electrode 3, above-mentioned dielectric layer 2, above-mentioned feeder pillar 6 are processed into integrative-structure with above-mentioned bolt 4 by integral cast.Fig. 1 also show the GIS metal flange 10, rainhat 9, N-Type joint 8 and the O-ring seal 7 that are connected with this sensor.
Wherein, metal base plate 1 is disk, its diameter is 130mm, thickness is 15mm, and dielectric layer 2 is epoxy material, and its thickness is 35mm, the internal diameter of the installation window of sensor is 230mm, feeder pillar 6 is arranged on the home position of above-mentioned disk electrode 3, and bolt 4 is arranged in the through hole of above-mentioned disk electrode 3, and each above-mentioned through hole is equal with the distance in the center of circle of said disk electrode.
Analog computation is carried out to the sensitivity of this sensor; obtain sensitivity curve as shown in Figure 7; from this curve; in this sensor 300MHz-1500MHz passband, sensitivity (equivalent height He) is all higher; 200MHz and following low frequency rejection characteristic better; 1800MHz and above HF reject characteristic are also better, simultaneously due to the direct grounding technology of coupling electrode that this sensor adopts, therefore fundamentally solve the problem of overvoltage protection.
As can be seen from the above description, the application's the above embodiments achieve following technique effect:
The sensor of the application adopts two earth studs being arranged on collar plate shape sensor by direct for disk electrode ground connection, makes impedance ground be zero, achieves the reliable object of collar plate shape sensor ground, eliminate the dangerous situation that superpotential is brought.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for a person skilled in the art, the application can have various modifications and variations.Within all spirit in the application and principle, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in the application.
Claims (10)
1. a built-in collar plate shape sensor, is characterized in that, described sensor comprises metal base plate, dielectric layer, disk electrode, feeder pillar and at least two bolts, and described disk electrode is by described bolt ground connection.
2. sensor according to claim 1, is characterized in that, described sensor comprises four described bolts, and four described bolts are arranged in four through holes of described disk electrode, and four described through holes are equal with the distance in the center of circle of said disk electrode.
3. sensor according to claim 1, is characterized in that, the diameter of described disk electrode is between 130 ~ 150mm.
4. sensor according to claim 1, is characterized in that, the thickness of described disk electrode is between 12 ~ 17mm.
5. sensor according to claim 1, is characterized in that, the thickness of described dielectric layer is between 30mm ~ 40mm.
6. sensor according to claim 1, is characterized in that, the material of described dielectric layer is epoxy material.
7. sensor according to claim 1, is characterized in that, the installation window internal diameter of described sensor is not less than 200mm.
8. sensor according to claim 1, is characterized in that, described feeder pillar is arranged on the home position of described disk electrode.
9. sensor according to claim 1, is characterized in that, described metal base plate, dielectric layer, described disk electrode, described feeder pillar and described bolt are processed into integrative-structure by integral cast.
10. sensor according to claim 1, is characterized in that, described metal base plate is provided with O-ring seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510347661.6A CN104898003A (en) | 2015-06-19 | 2015-06-19 | Built-in disc type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510347661.6A CN104898003A (en) | 2015-06-19 | 2015-06-19 | Built-in disc type sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104898003A true CN104898003A (en) | 2015-09-09 |
Family
ID=54030778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510347661.6A Pending CN104898003A (en) | 2015-06-19 | 2015-06-19 | Built-in disc type sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104898003A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702818A (en) * | 2021-08-12 | 2021-11-26 | 广东电网有限责任公司广州供电局 | GIS equipment and partial discharge ultrahigh frequency monitoring assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540033A (en) * | 2012-02-15 | 2012-07-04 | 江苏省电力试验研究院有限公司 | Built-in sensor for partial discharge ultrahigh frequency detection of gas insulated switchgear (GIS) |
| CN103176112A (en) * | 2013-03-28 | 2013-06-26 | 重庆大学 | Built-in ultrahigh frequency sensor for online detection of partial discharge of gas insulated switchgear |
| CN203688729U (en) * | 2013-12-27 | 2014-07-02 | 上海交通大学 | Novel ultrahigh frequency sensor for local discharge source space positioning, and array thereof |
| CN104614645A (en) * | 2015-01-16 | 2015-05-13 | 国家电网公司 | GIS and optimization method of integrated earthed ultrahigh-frequency partial discharge sensor of GIS |
| CN204347195U (en) * | 2015-01-16 | 2015-05-20 | 国家电网公司 | Sensor is put in Integral grounding type superfrequency office |
-
2015
- 2015-06-19 CN CN201510347661.6A patent/CN104898003A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540033A (en) * | 2012-02-15 | 2012-07-04 | 江苏省电力试验研究院有限公司 | Built-in sensor for partial discharge ultrahigh frequency detection of gas insulated switchgear (GIS) |
| CN103176112A (en) * | 2013-03-28 | 2013-06-26 | 重庆大学 | Built-in ultrahigh frequency sensor for online detection of partial discharge of gas insulated switchgear |
| CN203688729U (en) * | 2013-12-27 | 2014-07-02 | 上海交通大学 | Novel ultrahigh frequency sensor for local discharge source space positioning, and array thereof |
| CN104614645A (en) * | 2015-01-16 | 2015-05-13 | 国家电网公司 | GIS and optimization method of integrated earthed ultrahigh-frequency partial discharge sensor of GIS |
| CN204347195U (en) * | 2015-01-16 | 2015-05-20 | 国家电网公司 | Sensor is put in Integral grounding type superfrequency office |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702818A (en) * | 2021-08-12 | 2021-11-26 | 广东电网有限责任公司广州供电局 | GIS equipment and partial discharge ultrahigh frequency monitoring assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104459491A (en) | Arc sensor for partial discharge detection of high-voltage conductors in GIS | |
| CN103235166B (en) | Hand-hole type capacitive voltage divider | |
| CN107489597A (en) | Lightning conductor system | |
| CN102906955A (en) | A high voltage direct current cable termination apparatus | |
| CN103038965A (en) | A high voltage direct current cable termination apparatus | |
| CN102540033A (en) | Built-in sensor for partial discharge ultrahigh frequency detection of gas insulated switchgear (GIS) | |
| CN104898003A (en) | Built-in disc type sensor | |
| CN204462318U (en) | For the built-in sensor that GIS partial discharge detects | |
| CN104614645A (en) | GIS and optimization method of integrated earthed ultrahigh-frequency partial discharge sensor of GIS | |
| CN209344514U (en) | The device of steel tower tower head overvoltage when a kind of inhibition transmission line lightning stroke | |
| CN102801123B (en) | 20KV sleeve | |
| CN204359899U (en) | GIS internal high voltage conductor Partial Discharge Detection arc sensor | |
| CN109586226A (en) | The method and device of steel tower tower head overvoltage when a kind of inhibition transmission line lightning stroke | |
| CN103247854B (en) | Integrated electromagnetic pulse protection vehicle-mounted antenna | |
| CN107834199B (en) | Intelligent active lightning protection antenna and lightning protection system | |
| CN206893380U (en) | A kind of arrester of built-in inductance coil | |
| CN105428135B (en) | Disconnecting switch | |
| CN204347195U (en) | Sensor is put in Integral grounding type superfrequency office | |
| CN211858296U (en) | Three-phase lightning arrester with fracture | |
| CN103022928A (en) | Contact double-shielding structure | |
| CN104332258B (en) | The high-voltage wall bushing improved | |
| CN2821951Y (en) | Inductance lightning arrester | |
| CN209045260U (en) | A kind of arrester of monitoring interface with voltage | |
| US4521784A (en) | Ground-plane antenna with impedance matching | |
| CN210775728U (en) | Basin-type insulator with built-in partial discharge sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150909 |
|
| RJ01 | Rejection of invention patent application after publication |