CN111141961A - Sensor and transformer bushing monitoring system - Google Patents
Sensor and transformer bushing monitoring system Download PDFInfo
- Publication number
- CN111141961A CN111141961A CN201911239049.1A CN201911239049A CN111141961A CN 111141961 A CN111141961 A CN 111141961A CN 201911239049 A CN201911239049 A CN 201911239049A CN 111141961 A CN111141961 A CN 111141961A
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- Prior art keywords
- sensor
- jack
- sensing module
- sleeve
- terminal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The embodiment of the application provides a sensor and transformer bushing monitoring system, the sensor includes: the device comprises a sensor main body, a jack, a partial discharge sensing module and a dielectric loss sensing module, wherein the jack is arranged on the sensor main body and used for fixing a sleeve binding post, and the partial discharge sensing module and the dielectric loss sensing module are used for detecting the sleeve binding post; the partial discharge sensing module and the dielectric loss sensing module are of annular structures arranged around the hole wall of the jack, a crown spring is arranged in the jack, the outer wall of the crown spring is tightly attached to the inner wall of the jack, and the inner wall of the crown spring is inwards sunken to fix a sleeve binding post inserted into the jack; the method and the device can monitor the degradation state of the transformer bushing safely, effectively and accurately, and improve the safe reliability and the automation degree of the operation of the power system.
Description
Technical Field
The application relates to the field of sensors, in particular to a sensor and a transformer bushing monitoring system.
Background
In practical application, the insulation performance of the sleeve is damaged due to the fact that the transformer sleeve is affected with damp, and the sleeve is exploded in severe cases, so that whether the sleeve is affected with damp or not is judged by measuring dielectric loss of the transformer sleeve, and the method plays an important role in normal operation of the transformer. Various insulation defects develop to be finally broken down, before an accident happens, the partial discharge stage is usually passed first, and the intensity of the partial discharge can reflect the insulation state in time, so that the insulation state is judged by monitoring the partial discharge on line, and the method is an effective means for realizing the insulation on-line monitoring and diagnosis of the transformer bushing.
The inventor finds that in the prior art, an on-line measurement method for dielectric loss of a transformer bushing generally includes the steps that a tap current sensor is installed on a bushing tap of the transformer bushing, and different bushing tap interfaces of different manufacturers and different bushing tap structures of different models are different, so that the bushing tap sensors are generally customized independently along with the bushing to be installed, and batch standardized production is difficult, and therefore the bushing tap sensors are not well matched with the bushing tap, poor contact faults are likely to occur, and serious potential safety hazards are brought.
Therefore, the inventor provides a sensor and a transformer bushing monitoring system by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
Disclosure of Invention
To the problems in the prior art, the application provides a sensor and transformer bushing monitoring system, can monitor transformer bushing degradation state safely, effectively and accurately, improve the fail safe nature and the degree of automation of electric power system operation.
In order to solve the technical problem, the application provides the following technical scheme:
in a first aspect, the present application provides a sensor comprising:
the device comprises a sensor main body, a jack, a partial discharge sensing module and a dielectric loss sensing module, wherein the jack is arranged on the sensor main body and used for fixing a sleeve binding post, and the partial discharge sensing module and the dielectric loss sensing module are used for detecting the sleeve binding post;
the partial discharge sensing module and the dielectric loss sensing module are of annular structures surrounding the hole wall of the jack, a crown spring is arranged in the jack, the outer wall of the crown spring is tightly attached to the inner wall of the jack, and the inner wall of the crown spring is inwards sunken to fix a sleeve binding post inserted into the inner wall of the jack.
Further, still including setting up the insulator in jack entrance, a side end face of insulator with the spacing portion of sleeve pipe terminal offsets for to the sleeve pipe terminal inserts the part in the jack is spacing.
Further, still be provided with an at least super soft connecting wire in the jack, super soft connecting wire's one end with the top of sleeve pipe terminal is connected, super soft connecting wire's the other end stretches out the jack with the sensor main part is connected, the sensor main part comprises for the metal material that can electrically conduct, the sensor main part is with being used for fixing the terminal base of sleeve pipe terminal is connected, terminal base ground connection.
Further, a sealing ring is arranged between the sensor main body and the wiring column base.
Further, the sensor body also includes a sensor housing made of a stainless steel material.
Furthermore, the cylinder of the sleeve terminal is a metal conductor, and an insulating material is arranged on the side wall of the sleeve terminal.
Furthermore, the inner wall of the jack is provided with an internal thread, and the outer wall of the part of the sleeve binding post inserted into the jack is provided with an external thread corresponding to the internal thread.
Further, a top cover is arranged at the top of the sensor main body, and a waterproof sealing gasket is arranged between the top cover and the sensor main body.
Furthermore, an aviation plug electrically connected with the dielectric loss sensing module is arranged on the top cover.
Furthermore, an N-type joint electrically connected with the partial discharge sensing module is arranged on the top cover.
In a second aspect, the present application provides a transformer bushing monitoring system, comprising:
the transformer bushing and the bushing terminal arranged on the transformer bushing are further provided with the sensor, and the sensor is used for fixing the bushing terminal and detecting the bushing terminal.
According to the technical scheme, the application provides a sensor and transformer bushing monitoring system, through set up the crown spring in the jack of fixed sleeve pipe terminal, rely on the extrusion force that the inside sunken shape of crown spring provided to fix the sleeve pipe terminal that inserts wherein to ensure in the jack that can both be firm the fixed in sensor of the sleeve pipe terminal of various models, overcome and lead to contact failure because of sensor and sleeve pipe terminal model mismatch, and then produce the problem of potential safety hazard.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a sensor according to the present application;
FIG. 2 is a front view of a sensor according to the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In consideration of the prior art, the on-line measurement method for the dielectric loss of the transformer bushing generally comprises the steps of installing a tap current sensor on a bushing tap of the transformer bushing, wherein the tap interface of the bushing is different from one bushing manufacturer, and the structures of the bushing taps of different manufacturers are different, so that the bushing tap sensor is generally customized independently along with the bushing to be installed, and batch standardized production is difficult, and therefore the bushing tap sensor is not well matched with the bushing tap, poor contact faults are likely to occur, and serious potential safety hazards are brought.
In order to safely, effectively and accurately monitor the degradation state of a transformer bushing and improve the safety reliability and the automation degree of the operation of a power system, the application provides an embodiment of a sensor, which is shown in fig. 1 and 2, in the embodiment, the sensor specifically includes a sensor main body, a jack 5 which is arranged on the sensor main body and used for fixing a bushing terminal post 4, and a partial discharge sensing module 13 and a dielectric loss sensing module 14 which are used for detecting the bushing terminal post 4;
Alternatively, the partial discharge sensing module 13 may be an existing sensing device capable of measuring a partial discharge condition, and the dielectric loss sensing module 14 may be an existing sensing device capable of measuring a dielectric loss condition.
Optionally, the partial discharge sensing module 13 and the dielectric loss sensing module 14 surround the hole wall of the jack 5, and are in an annular structure, so that the maximum efficiency is facilitated for detecting the sleeve terminal 4 inserted into the jack.
Alternatively, the insertion hole 5 may be a through hole with a cylindrical inner cavity, in which a crown spring is disposed, or the insertion hole 5 may be directly an existing crown spring insertion hole, such as a threaded crown spring insertion hole, and if the insertion hole 5 is a crown spring insertion hole, a fixing nut 7 may be disposed to fix the crown spring insertion hole to the insulator 2.
It can be known from the above description, according to the sensor that this application embodiment provided, through set up the crown spring in the jack 5 of fixed sleeve terminal post 4, rely on the extrusion force that the inward sunken shape of crown spring provided to fix sleeve terminal post 4 inserted wherein to ensure that the sleeve terminal post 4 of various models can both be firm be fixed in the jack 5 of sensor, overcome because of sensor and sleeve terminal post 4 model mismatch and lead to contact failure, and then produce the problem of potential safety hazard.
As a preferred embodiment, the insulator 2 is further included at an inlet of the jack 5, and an end surface of one side of the insulator 2 abuts against the limiting portion of the sleeve terminal 4, so as to limit a portion of the sleeve terminal 4 inserted into the jack 5.
Optionally, the insulator 2 may also be used to insulate the housing (e.g. a stainless steel housing) of the sensor body from the insertion hole 5, and at the same time, may also be used to fixedly support the insertion hole 5.
As a preferred embodiment, at least one ultra-soft connection line 16 is further arranged in the jack 5, one end of the ultra-soft connection line 16 is connected with the top end of the sleeve terminal 4, the other end of the ultra-soft connection line 16 extends out of the jack 5 and is connected with the sensor main body, the sensor main body is made of a conductive metal material, the sensor main body is connected with the terminal base 3 for fixing the sleeve terminal 4, and the terminal base 3 is grounded.
Alternatively, the ultra-soft connection wires 16 may be made of a metal material with better electrical conductivity, such as copper, the number of the ultra-soft connection wires 16 is not limited herein, for example, 5 ultra-soft connection wires may be provided, and the ultra-soft connection wires 16 may be welded on the inner wall of the jack 5 to achieve connection with the top end of the sleeve terminal 4.
Optionally, one end of the ultra-soft connection line 16 is connected to the top end of the casing terminal 4, and the other end of the ultra-soft connection line 16 extends out of the jack 5 to be connected to the sensor body, since the sensor body may be made of a metal material having a conductive property, and the sensor body may be connected to the terminal base 3 for fixing the casing terminal 4, and the terminal base 3 is grounded, which is equivalent to the indirect grounding of the casing terminal 4 through the ultra-soft connection line 16.
In a preferred embodiment, a sealing ring 7 is arranged between the sensor body and the terminal base 3.
Alternatively, in one embodiment, the sensor body and the post base 3 are substantially cylindrical, and an O-ring seal 7 may be used to seal the junction.
As a preferred embodiment, the sensor body further comprises a sensor housing 1 made of a stainless steel material.
Optionally, the sensor housing 1 obtained by processing the stainless steel material can shield most external electromagnetic signals, so that the measurement of the sensor is more accurate, and interference factors are reduced.
In a preferred embodiment, the cylindrical body of the casing terminal 4 is a metal conductor, and an insulating material is disposed on a side wall of the casing terminal 4.
As a preferred embodiment, the inner wall of the insertion hole 5 is provided with an internal thread, and the outer wall of the portion of the sleeve terminal 4 inserted into the insertion hole 5 is provided with an external thread corresponding to the internal thread.
Optionally, by providing an internal thread and an external thread, the sleeve terminal 4 and the jack 5 can be screwed together, and in another embodiment of the present application, the jack 5 may also be a threaded connection type crown spring jack, and the sleeve terminal 4 can be directly screwed together.
As a preferred embodiment, a top cover 8 is arranged on the top of the sensor body, and a waterproof sealing gasket 9 is arranged between the top cover 8 and the sensor body.
Optionally, a waterproof sealing pad 9 is adhered to the bottom of the top cover 8 of the sensor, so that the waterproof performance of the sensor in an open air environment can be improved.
In a preferred embodiment, the top cover 8 is provided with an aviation plug 11 electrically connected to the dielectric loss sensing module 14, for deriving a sensing signal of the dielectric loss sensing module 14.
Alternatively, the dielectric loss sensing module 14 may be fixed by providing a transformer support pad 15.
As a preferred embodiment, an N-type connector 10 electrically connected to the partial discharge sensing module 13 is disposed on the top cover 8, and is used for deriving a sensing signal of the partial discharge sensing module 13.
Alternatively, the partial discharge sensing module 13 may adopt a small high-frequency magnetic core, and a suitable number of coils are wound around the small high-frequency magnetic core, and a protection device is connected to the output end of the partial discharge sensing module.
In order to safely, effectively and accurately monitor the degradation state of the transformer bushing and improve the safety reliability and the automation degree of the operation of the power system, the present application provides an embodiment of a transformer bushing monitoring system, in this embodiment, referring to fig. 1 and fig. 2, the transformer bushing monitoring system specifically includes: the transformer bushing and the bushing terminal 4 arranged on the transformer bushing further comprise the sensor, and the sensor is used for fixing the bushing terminal 4 and detecting the bushing terminal 4.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (11)
1. A sensor, comprising: the device comprises a sensor main body, a jack, a partial discharge sensing module and a dielectric loss sensing module, wherein the jack is arranged on the sensor main body and used for fixing a sleeve binding post, and the partial discharge sensing module and the dielectric loss sensing module are used for detecting the sleeve binding post;
the partial discharge sensing module and the dielectric loss sensing module are of annular structures surrounding the hole wall of the jack, a crown spring is arranged in the jack, the outer wall of the crown spring is tightly attached to the inner wall of the jack, and the inner wall of the crown spring is inwards sunken to fix a sleeve binding post inserted into the inner wall of the jack.
2. The sensor according to claim 1, further comprising an insulator disposed at an entrance of the jack, wherein a side end surface of the insulator abuts against the limiting portion of the sleeve terminal for limiting a portion of the sleeve terminal inserted into the jack.
3. The sensor according to claim 1, wherein at least one super-soft connecting wire is further arranged in the jack, one end of the super-soft connecting wire is connected with the top end of the sleeve terminal, the other end of the super-soft connecting wire extends out of the jack and is connected with the sensor main body, the sensor main body is made of conductive metal materials, the sensor main body is connected with a terminal base used for fixing the sleeve terminal, and the terminal base is grounded.
4. The sensor of claim 3, wherein a sealing ring is disposed between the sensor body and the post base.
5. The sensor of claim 1, wherein the sensor body further comprises a sensor housing made of a stainless steel material.
6. The sensor of claim 1, wherein the post of the sleeve post is a metal conductor and the sidewall of the sleeve post is provided with an insulating material.
7. The sensor according to claim 1, wherein an inner wall of the jack is provided with an internal thread, and an outer wall of a portion of the sleeve terminal inserted into the jack is provided with an external thread corresponding to the internal thread.
8. The sensor of claim 1, wherein a top cover is disposed on top of the sensor body, and a waterproof gasket is disposed between the top cover and the sensor body.
9. The sensor of claim 8, wherein the top cover is provided with an aviation plug electrically connected with the dielectric loss sensing module.
10. The sensor of claim 8, wherein the top cover is provided with an N-type connector electrically connected to the partial discharge sensing module.
11. A transformer bushing monitoring system comprising a transformer bushing and a bushing terminal provided on the transformer bushing, characterized by further comprising a sensor according to any one of claims 1-10, said sensor fixing said bushing terminal and detecting said bushing terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239049.1A CN111141961A (en) | 2019-12-06 | 2019-12-06 | Sensor and transformer bushing monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239049.1A CN111141961A (en) | 2019-12-06 | 2019-12-06 | Sensor and transformer bushing monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN111141961A true CN111141961A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911239049.1A Pending CN111141961A (en) | 2019-12-06 | 2019-12-06 | Sensor and transformer bushing monitoring system |
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| CN201185317Y (en) * | 2008-03-17 | 2009-01-21 | 高文彬 | Sulfur hexafluoride leakage-proof connector for electric force looped network cabinet |
| CN206301024U (en) * | 2016-12-24 | 2017-07-04 | 北京汇清合源测控技术有限公司 | A kind of integrated transducer for partial discharge of transformer detection |
| CN107831410A (en) * | 2017-09-26 | 2018-03-23 | 杭州西湖电子研究所 | A kind of capacitive bottom shielding of bushing signal supervisory instrument |
| CN208399634U (en) * | 2018-06-26 | 2019-01-18 | 广西电网有限责任公司电力科学研究院 | A kind of comprehensive on-line monitoring system of electric power transformer insulated state |
| CN110398660A (en) * | 2019-08-01 | 2019-11-01 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | A kind of end shield of high-voltage bushing earthing detection and on-Line Monitor Device |
-
2019
- 2019-12-06 CN CN201911239049.1A patent/CN111141961A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201185317Y (en) * | 2008-03-17 | 2009-01-21 | 高文彬 | Sulfur hexafluoride leakage-proof connector for electric force looped network cabinet |
| CN206301024U (en) * | 2016-12-24 | 2017-07-04 | 北京汇清合源测控技术有限公司 | A kind of integrated transducer for partial discharge of transformer detection |
| CN107831410A (en) * | 2017-09-26 | 2018-03-23 | 杭州西湖电子研究所 | A kind of capacitive bottom shielding of bushing signal supervisory instrument |
| CN208399634U (en) * | 2018-06-26 | 2019-01-18 | 广西电网有限责任公司电力科学研究院 | A kind of comprehensive on-line monitoring system of electric power transformer insulated state |
| CN110398660A (en) * | 2019-08-01 | 2019-11-01 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | A kind of end shield of high-voltage bushing earthing detection and on-Line Monitor Device |
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Application publication date: 20200512 |