CN207116125U - The insulator of Electric Field Distribution near high-field electrode can be improved - Google Patents
The insulator of Electric Field Distribution near high-field electrode can be improved Download PDFInfo
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- CN207116125U CN207116125U CN201720821654.XU CN201720821654U CN207116125U CN 207116125 U CN207116125 U CN 207116125U CN 201720821654 U CN201720821654 U CN 201720821654U CN 207116125 U CN207116125 U CN 207116125U
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- electrode
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- electric field
- insulator
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Abstract
A kind of insulator that can improve Electric Field Distribution near high-field electrode is the utility model is related to, auxiliary electrode is bonded in the outer surface of the high-field electrode of insulator, dielectric assembled unit is bonded in the outer surface of auxiliary electrode and first full skirt of close high-field electrode；Auxiliary electrode Nian Jie with dielectric assembled unit is an entirety.Auxiliary electrode of the present utility model improves original electrode shape, increases the radius of curvature of electrode, improves the Electric Field Distribution near electrode；Original electrode is avoided because burr, the phenomenon of corner angle and caused electric field local enhancement；Dielectric unit can improve the electric field near high-field electrode at electrode, improve the dielectric strength near electrode；Dielectric unit protects the full skirt at full skirt, adds the service life of full skirt；Electric field caused by its polarization charge, it will weaken original electric field on full skirt surface, reduce the steepness of air and full skirt interface field strength.
Description
Technical field
A kind of high-voltage strut insulator is the utility model is related to, specially one kind can improve high-field electrode Electric Field Distribution nearby
Insulator.
Background technology
Electrically from the whole process for producing, being transported to consumption, it is necessary to have the stability and reliability of height.In order to
Enough use this energy, it is necessary to which it is essential condition that electric energy, which is maintained, and this task is just undertaken by insulation technology.
In this technology, the insulator shown in Fig. 3 is the electric insulation for undertaking electrical equipment and the device being mechanically fixed, and it is whole
Usage amount is very big in power system, and the design of its insulation system is to ensure the basic technology of operation of power networks.Therefore Improvement shows
There is the design of insulator, more excellent electromechanical properties requirement is proposed to them, the problem of being one particularly important.Particularly with
China's power system developing rapidly towards extra-high voltage Large Copacity direction, is improving longtime running characteristic, the design of insulator
Reasonability etc. can all propose a series of more strict requirements.In this respect, the utility model will carry in this field
Go out a kind of new more rational design method.
The design of high-tension insulator generally comprise electrically, both mechanically and thermally three aspect.The utility model pertains only to insulate
The electric property of son.
Column support type insulator and the major class of thimble tube two can be divided into the electrode arrangement principle of insulator.The former two electrodes
(high-field electrode and grounding electrode) is mutually adjacent to arrange, two electrode crossings of the latter (being mutually inserted) arrangement.The utility model
Pertain only to the former electrode layout pattern.
Insulator can form high field near its high-field electrode, and the electric field substantially belongs to severe non-uniform electric field,
This electric field can substantially reduce the flashover voltage of insulator.Therefore need to take measures to make electric fields uniform as much as possible in the design
Or flashover is set to be difficult to develop.For the former, the method being commonly used be installing grading ring, the purpose is to electric field pole not
Uniform region is moved outward, prevents the undue concentration of electric field, prevents the formation of corona and shelf depreciation；For the latter, it is often
Umbrella rib is set in insulator field strength highest place, to hinder the development of flashover.
In addition to above two method, the applicant exists《A kind of outdoor post insulator post of three element structures》(in
State's number of patent application 201610365743.8) in, upper insulator high-field electrode set high-field electrode accessory system, it is upper,
The electrode connection of lower insulator sets target accessory system, and grounding electrode annex is set in the grounding electrode of lower insulator
System, grounding electrode accessory system is set near grounding electrode.High-field electrode accessory system, target accessory system, connect
Ground electrode accessory system and grounding electrode accessory system are made up of high-voltage isulation part and high-pressure conductive part.
Though this insulator can improve the antifouling work ability, damp proof sudden strain of a muscle ability and lightning protection capability of this insulator, by
Following deficiency：
1st, in terms of the particular location of Fig. 2 of this application high-field electrode accessory system current-carrying part and shape, current-carrying part
Effect only increase the exposure level of insulator high-field electrode and accessory system insulated part, do not play improve it is original high
Press the function of electrode shape；
2nd, the full skirt of insulator shown in Fig. 2 of this application and accessory system are counted in the presence of wet pollution layer
Calculation machine emulates, and its result of calculation see the table below.By Fig. 4 it can be found that second weak point of the invention：High-field electrode annex
The current potential of the exumbrella skirt portion 7-1 of system bottom (point C) and interior full skirt part 7-3 bottom (point B) is than adjacent insulation
The outermost (point A) of sub- full skirt will height.Because there is wet pollution layer, the potential of wet pollution layer in the surface of high-field electrode accessory system
It is approximately the voltage of high-pressure side so that point A potential is less than point B and point C potential, and the electric-field intensity at point C is maximum,
Therefore electric arc may get to point A from point C, cause the flashover voltage of insulator to decline on the contrary.
| Point A | Point B | Point C | |
| Potential (kV) | 1.61 | 1.79 | 1.79 |
| Electric field mould (kV/mm) | 0.59 | 1.48 | 1.92 |
3rd, the insulated part of accessory system uses the silastic material of general dielectric constant.
The electrode structure of support insulator is close to rod -- the structure of plate electrode arrangement, belong to severe non-uniform electric field.Its electric field
Distribution is determined by the geometry and insulating dielectric materials of electrode.Equipotential near Fig. 5 support insulator high-field electrode
The distribution map of line 3 can be seen that：Electric field near high-field electrode is extremely concentrated, and its first adjacent full skirt is almost born
More than 50% voltage, i.e., it is the maximum region of electric potential gradient here.In the region, always produce initiating electron, they
The crucial electron avalanche for causing insulator surface flashover can be triggered in short time, it is therefore desirable to improve Electric Field Distribution shape here
State.
The content of the invention
The purpose of this utility model is on the basis of the weak point of foregoing invention is overcome, it is desirable to provide one kind is by changing
It is apt to the shape of high-field electrode, improves the exhausted of the Electric Field Distribution near insulator high-field electrode using polarization of dielectric and shape
Edge.
The implementation of the utility model purpose is that can improve the insulator of Electric Field Distribution near high-field electrode, is being insulated
The outer surface bonding auxiliary electrode of the high-field electrode of son, in the outer surface of auxiliary electrode and first full skirt of close high-field electrode
It is bonded dielectric assembled unit；Auxiliary electrode Nian Jie with dielectric assembled unit is an entirety.
The utility model has advantages below：
1st, auxiliary electrode is bonded in the outer surface of the high-field electrode of insulator, auxiliary electrode is easily modified original electrode shape
Shape, increase the radius of curvature of electrode, improve the Electric Field Distribution near electrode；Avoid original electrode because burr, corner angle and produce
Electric field local enhancement phenomenon；
2nd, dielectric unit is in the air near high-field electrode at electrode, because the disruptive field intensity and dielectric of air are normal
Number is more much smaller than solid material, so shelf depreciation can be produced near high-field electrode, dielectric unit can improve height
The high electric field of electrode attachment is pressed, improves the dielectric strength near electrode；
3rd, first full skirt close to high-field electrode is in the danger zone of high field intensity, and dielectric unit is by the umbrella at full skirt
Skirt protects, and adds the service life of full skirt；Electric field caused by its polarization charge, it will make original electricity on full skirt surface
Field is weakened, and reduces the steepness of air and full skirt interface field strength.
Brief description of the drawings
Fig. 1 is the utility model structure diagram,
Fig. 2 is the partial enlarged drawing of the auxiliary electrode and dielectric assembled unit in Fig. 1,
Fig. 3 is existing 110kV support insulators structural representation,
Fig. 4 be CN201610365743.8 Fig. 2 by the result of calculation figure of Computer Simulation,
Fig. 5 is the pattern of equipotentials near support insulator high-field electrode.
Embodiment
The electric property of insulator can be summarized as two broad aspects：Electric insulation property and storage required for holding voltage
The dielectric property of electric charge.The utility model is namely based on the dielectric property of insulator to improve near insulator high-field electrode
Electric Field Distribution.
The utility model is described in detail with reference to the accompanying drawings.
Reference picture 1, Fig. 2, the utility model are bonded auxiliary electrode 2-1 in the outer surface of the high-field electrode 2 of insulator 1,
The outer surface bonding dielectric assembled unit 2-2 of first full skirt of auxiliary electrode 2-1 and close high-field electrode 2；Auxiliary electrode
Nian Jie with dielectric assembled unit is an entirety.
The group that the dielectric assembled unit is dielectric unit 2-2-2 at dielectric unit 2-2-1 and full skirt at electrode
Close.Dielectric unit 2-2-1 is in the highfield near high-field electrode 2 at electrode, and dielectric unit 2-2-2 is coated at full skirt
The outer surface of first full skirt near high-field electrode 2.
The outer surface of the high-field electrode in insulator is using room temperature vulcanized silicone rubber bonding agent bonding auxiliary electrode.
It is single that the outer surface of first full skirt of auxiliary electrode and close high-field electrode is bonded dielectric combination by the way of high temperature vulcanized
Member.
The auxiliary electrode is less than the conducing composite material of 50 ohmcms using specific insulation.Dielectric at electrode
Unit is more than 6 composite using relative dielectric constant, and dielectric unit uses relative dielectric constant answering more than 3 at full skirt
Condensation material.
The utility model is bonded auxiliary electrode in the outer surface of the high-field electrode 2 of insulator, and auxiliary electrode 2-1 improves height
The shape of piezoelectricity pole 2, increase the radius of curvature of high-field electrode 2；Due to being less than 50 ohmcms using specific insulation
Conductive material, improve the Electric Field Distribution near high-field electrode；In addition, auxiliary electrode avoids high-field electrode because burr, rib
Angle and the phenomenon of caused electric field local enhancement.
The utility model is bonded dielectric in auxiliary electrode 2-1 and first full skirt of close high-field electrode 2 outer surface
Assembled unit 2-2；Auxiliary electrode Nian Jie with dielectric assembled unit is an entirety.Dielectric assembled unit can utilize medium
The law of refraction adjust electric field.
Dielectric unit is in the air near high-field electrode at the electrode, because the disruptive field intensity and dielectric of air
Constant is more much smaller than solid material, so shelf depreciation can be produced near high-field electrode.And due to dielectric at electrode
The high-k of unit, the high electric field of high-field electrode annex is improved, improve the dielectric strength near electrode.
The danger zone of high field intensity is in close to first full skirt of high-field electrode, and dielectric unit is by original at the full skirt
There is full skirt to protect, add the service life of full skirt.Secondly, the unit is high-k, caused by its polarization charge
Electric field, it will weaken original electric field on full skirt surface, reduce the steepness of air and full skirt interface field strength.
Claims (5)
1. the insulator of Electric Field Distribution near high-field electrode can be improved, it is characterised in that：In the appearance of the high-field electrode of insulator
Face is bonded auxiliary electrode, single in the outer surface bonding dielectric combination of auxiliary electrode and first full skirt of close high-field electrode
Member；Auxiliary electrode Nian Jie with dielectric assembled unit is an entirety.
2. the insulator according to claim 1 that Electric Field Distribution near high-field electrode can be improved, it is characterised in that：Insulating
The outer surface of the high-field electrode of son is using room temperature vulcanized silicone rubber bonding agent bonding auxiliary electrode.
3. the insulator according to claim 1 that Electric Field Distribution near high-field electrode can be improved, it is characterised in that：Aiding in
The outer surface of first full skirt of electrode and close high-field electrode is bonded dielectric assembled unit by the way of high temperature vulcanized.
4. the insulator according to claim 1 that Electric Field Distribution near high-field electrode can be improved, it is characterised in that：Dielectric
Assembled unit is the combination of dielectric unit at dielectric unit and full skirt at electrode.
5. the insulator according to claim 1 that Electric Field Distribution near high-field electrode can be improved, it is characterised in that：Auxiliary electricity
Pole is less than the conducing composite material of 50 ohmcms using specific insulation；Dielectric unit uses relative dielectric normal at electrode
Number is more than 6 composite, and dielectric unit is using composite of the relative dielectric constant more than 3 at full skirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720821654.XU CN207116125U (en) | 2017-07-08 | 2017-07-08 | The insulator of Electric Field Distribution near high-field electrode can be improved |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720821654.XU CN207116125U (en) | 2017-07-08 | 2017-07-08 | The insulator of Electric Field Distribution near high-field electrode can be improved |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207116125U true CN207116125U (en) | 2018-03-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720821654.XU Withdrawn - After Issue CN207116125U (en) | 2017-07-08 | 2017-07-08 | The insulator of Electric Field Distribution near high-field electrode can be improved |
Country Status (1)
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| CN (1) | CN207116125U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359022A (en) * | 2017-07-08 | 2017-11-17 | 广东电网有限责任公司惠州供电局 | The insulator of Electric Field Distribution near high-field electrode can be improved |
| CN108717888A (en) * | 2018-05-29 | 2018-10-30 | 南方电网科学研究院有限责任公司 | A kind of insulator and preparation method thereof with high dielectric constant film |
-
2017
- 2017-07-08 CN CN201720821654.XU patent/CN207116125U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359022A (en) * | 2017-07-08 | 2017-11-17 | 广东电网有限责任公司惠州供电局 | The insulator of Electric Field Distribution near high-field electrode can be improved |
| CN107359022B (en) * | 2017-07-08 | 2023-07-28 | 广东电网有限责任公司惠州供电局 | Insulator capable of improving electric field distribution near high-voltage electrode |
| CN108717888A (en) * | 2018-05-29 | 2018-10-30 | 南方电网科学研究院有限责任公司 | A kind of insulator and preparation method thereof with high dielectric constant film |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180316 Effective date of abandoning: 20230728 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180316 Effective date of abandoning: 20230728 |