CN105140000A - Capacitive voltage transformer - Google Patents
Capacitive voltage transformer Download PDFInfo
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- CN105140000A CN105140000A CN201510621909.3A CN201510621909A CN105140000A CN 105140000 A CN105140000 A CN 105140000A CN 201510621909 A CN201510621909 A CN 201510621909A CN 105140000 A CN105140000 A CN 105140000A
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- insulator
- full skirt
- expander
- capacitance type
- voltage divider
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Abstract
The invention discloses a capacitive voltage transformer. The capacitive voltage transformer comprises a capacitive voltage divider, an expander, an intermediate transformer and an oil tank, wherein the expander is mounted at the top of the capacitive voltage divider; the oil tank is mounted at the bottom of the capacitive voltage divider; the capacitive voltage divider consists of a porcelain bushing and a capacitor unit arranged in the porcelain bushing; the top of the capacitor unit is fixedly connected with a flange at the top of the porcelain bushing through a hold-down structure; the porcelain bushing is a profiling porcelain bushing of which the external diameter gradually increases from the end, close to the expander, to the end, close to the oil tank; the capacitor unit comprises a plurality of insulation cores, each insulation core consists of a plurality of elements which are connected in series, paper boards used for fixation enhancement are arranged at the periphery of each insulation core, packing belts are fixed on the outer sides of the paper boards, and the insulation cores are stacked up and down after being packed. The capacitive voltage transformer can adapt to influences caused by thermal expansion and cold contraction in high-altitude areas, and has the advantages of being low in probability of deformation, relatively high in leak tightness and stability, and high in strength.
Description
Technical field
The present invention relates to high voltage electric power equip ment field, particularly relate to a kind of capacitance type potential transformer.
Background technology
Voltage transformer is the indispensable a kind of electrical equipment of the transmission of electricity such as power plant, electric substation and electric power system.It is mainly used for powering to measuring instrument and protective relaying device, is used for the voltage of measurement circuitry, power and electric energy, or is used for expensive equipment, motor and the transformer when line failure in protection circuit.
Capacitance type potential transformer extracts voltage by series capacitor; again through the voltage transformer of transformer transformation as the voltage source of table meter, relaying protection etc., carrier frequency can also be coupled to power transmission line and be used for long distance communication, distant place measurement, optionally HF protection for transmission line, remote control, telex etc. by capacitance type potential transformer.Therefore compare with the electromagnetic potential transformer of routine, capacitance type potential transformer device is except can preventing from causing ferro resonance because iron core of voltage transformer is saturated, also have office high-volume low, dielectric dissipation factor is little, the advantages such as sealing is reliable, service life is long, the focus of work is low, stable, more and more apply by electric power system.But in recent years, capacitance type potential transformer there occurs a lot of accident or fault, causes heavy economic losses to electric power enterprise, also gave and caused very large threat for electrical stability.
High altitude localities has severe natural climate condition, and because temperature is lower, the temperature difference is comparatively large, and be especially about the area of 4km in height above sea level, about its lowest temperature can reach 40 degrees below zero, maximum temperature difference per day can reach 30K.Impact due to rising-heat contracting-cold can cause device generation deformation, and sealing property reduces.Further, height above sea level raises, and atmospheric pressure or atmospheric density decrease, and cause the reduction of air dielectric cooling effect, and the heat-sinking capability of capacitance type potential transformer can be made to reduce, and it is comparatively large that temperature rise affects amplitude, thus affect the useful life of capacitance type potential transformer.
Capacitance type mutual inductor is very important in electric power system, and therefore, ensureing that capacitance type potential transformer safely and steadily runs just becomes problem demanding prompt solution.
Therefore, be necessary to propose a kind of new technical scheme to solve the problem.
Summary of the invention
The defect that the object of the invention is to overcome prior art provides a kind of capacitance type potential transformer, and it can adapt to the impact that high altitude localities is brought owing to expanding with heat and contract with cold, and not easily deforms, and sealing and stability are better, and intensity is high.
In order to solve the problems of the technologies described above, the invention provides a kind of capacitance type potential transformer, comprise capacitor voltage divider, expander, intermediate transformer and fuel tank, described expander is installed on the top of described capacitor voltage divider, described fuel tank is arranged on the bottom of described capacitor voltage divider, described capacitor voltage divider is made up of insulator and capacitor cell, and it is inner that described capacitor cell is arranged on described insulator, and the top of described capacitor cell is fixedly connected with by the flange of compressing structure with described insulator top; Described insulator is imitative type insulator, and the outer of described insulator increases to one end of close described fuel tank gradually near one end of described expander without leave; Described capacitor cell comprises multiple insulation core, each described insulation core is composed in series by several elements, the surrounding of each described insulation core is provided with for strengthening fixing cardboard, and the outside of described cardboard is fixed with strap, mounted on top after multiple described insulation core packing.
Preferably, described compressing structure is spring.
Further, the top of described insulator is tightly connected by described flange and described expander, and the bottom of described insulator is tightly connected by described flange and described fuel tank.
Preferably, energy absorbing resin is filled with between described insulator and described flange.
Particularly, described insulator is by cement glue and described flange mucilage binding.
Further, described insulator comprises porcelain piece body and full skirt, the outer of described porcelain piece body increases to the one end near described fuel tank gradually near one end of described expander without leave, described full skirt comprises large full skirt and little full skirt, described large full skirt and little full skirt are arranged alternately in the surface of described porcelain piece body from top to bottom, and the distance that described large full skirt stretches out described porcelain piece body is greater than the distance that described little full skirt stretches out described porcelain piece body.
Capacitance type potential transformer of the present invention, has following beneficial effect:
1, insulator of the present invention adopts contoured design, and the profile design of insulator is become up-thin-low-thick shape, and mechanical strength is high, and the insulator solving high altitude localities is increased and the problem of intensity reduction, can be applicable to high altitude localities preferably.
2, insulation core grouping of the present invention press-fits, and every part strictly adopts the strap of regular length and intensity and cardboard to be fixed, guarantees that every cored sub-component height is consistent, compresses consistent.For the fuse compressed, install compressing structure at fuse top, the pressure of compressing structure, according to the measuring and calculating of fuse internal pressure, finally guarantees that every cored compresses consistent, guarantees not loosen at transportation fuse, distortion etc. is abnormal.
3, add energy absorbing resin between insulator of the present invention and flange, offset deformation effect time expanding with heat and contract with cold in high altitude localities.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of capacitance type potential transformer of the present invention;
Fig. 2 is the structural representation of the insulator of capacitance type potential transformer of the present invention;
Fig. 3 is the structural representation of the capacitor cell of capacitance type potential transformer of the present invention;
Fig. 4 is multiple insulation cores of capacitance type potential transformer of the present invention, the syndeton schematic diagram between cardboard and strap;
Fig. 5 is each insulation core of capacitance type potential transformer of the present invention and the syndeton schematic diagram of cardboard.
Wherein, in figure, Reference numeral corresponds to: 1-insulator, 11-porcelain piece body, 12-full skirt, the large full skirt of 121-, the little cluster parachute of 122-, 2-capacitor cell, 3-compressing structure, 4-flange, 5-element, 6-cardboard, 7-strap, 8-insulation core.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in inventive embodiments, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
Refer to Fig. 1, the invention provides a kind of capacitance type potential transformer, comprise capacitor voltage divider, expander (not shown), intermediate transformer (not shown) and fuel tank (not shown), described expander is installed on the top of described capacitor voltage divider, described fuel tank is arranged on the bottom of described capacitor voltage divider, described capacitor voltage divider is made up of insulator 1 and capacitor cell 2, it is inner that described capacitor cell 2 is arranged on described insulator 1, the top of described capacitor cell 2 is fixedly connected with by the flange 4 of compressing structure 3 with described insulator 1 top, preferably, described compressing structure 3 is spring, the pressure of described compressing structure 3 is calculated according to described capacitor cell 2 internal pressure, for making the compression of described capacitor cell 2 consistent.
Refer to Fig. 3 to Fig. 5, described capacitor cell 2 comprises multiple insulation core 8, each described insulation core 8 is composed in series by several elements 5, in order to be suitable for the environment of high altitude localities, the height of capacitance type potential transformer can increase, and the height increase of product can make built-in electrical insulation fuse that the exceptions such as inconsistent occur to loosen or compress, in order to address this problem, described insulation core 8 grouping press-fits by the present embodiment, the process that concrete grouping press-fits is as follows: the surrounding often organizing described insulation core 8 strictly adopts the described cardboard 6 of regular length and intensity to carry out strengthening and fixes, the outside of described cardboard 6 is fixed with the length strap all identical with intensity 7, guarantee that the height of every core assembly is consistent, compress consistent.The multiple described insulation core 8 compressed forms described capacitor cell 2 along the short transverse mounted on top of described insulator 1, and is provided with described compressing structure 3 at the top of described capacitor cell 2.To sum up, described insulation core 8 is by the acting in conjunction of described compressing structure 3, described cardboard 6 and described strap 7, and make the exceptions such as fuse does not loosen in transport and use procedure, distortion, stability is better, can be adapted to high altitude localities better.
Refer to Fig. 2, it is insulator structural representation, described insulator 1 is imitative type insulator, the top of described insulator 1 is tightly connected with described expander by described flange 4, the bottom of described insulator 1 is tightly connected with described fuel tank by described flange 4, described insulator 1 is by cement glue and described flange 4 mucilage binding, the outer of described insulator 1 increases to the one end near described fuel tank gradually near one end of described expander without leave, in order to offset deformation effect time expanding with heat and contract with cold in high altitude localities, between described insulator 1 and described flange 4, be filled with energy absorbing resin.Described insulator 1 comprises porcelain piece body 11 and full skirt 12, the outer of described porcelain piece body 11 increases to the one end near described fuel tank gradually near one end of described expander without leave, described full skirt 12 comprises large full skirt 121 and little full skirt 122, described large full skirt 121 and little full skirt 122 are arranged alternately in the surface of described porcelain piece body 11 from top to bottom, and the distance that described large full skirt 121 stretches out described porcelain piece body 11 is greater than the distance that described little full skirt 122 stretches out described porcelain piece body 11.
Capacitance type potential transformer of the present invention, has following beneficial effect:
1, insulator of the present invention adopts contoured design, and the profile design of insulator is become up-thin-low-thick shape, and mechanical strength is high, and the insulator solving high altitude localities is increased and the problem of intensity reduction, can be applicable to high altitude localities preferably.
2, insulation core grouping of the present invention press-fits, and every part strictly adopts the strap of regular length and intensity and cardboard to be fixed, guarantees that every cored sub-component height is consistent, compresses consistent.For the fuse compressed, install compressing structure at fuse top, the pressure of compressing structure, according to the measuring and calculating of fuse internal pressure, finally guarantees that every cored compresses consistent, guarantees not loosen at transportation fuse, distortion etc. is abnormal.
3, add energy absorbing resin between insulator of the present invention and flange, offset deformation effect time expanding with heat and contract with cold in high altitude localities.
Above disclosedly be only several preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (6)
1. a capacitance type potential transformer, comprise capacitor voltage divider, expander, intermediate transformer and fuel tank, described expander is installed on the top of described capacitor voltage divider, described fuel tank is arranged on the bottom of described capacitor voltage divider, described capacitor voltage divider is made up of insulator (1) and capacitor cell (2), it is inner that described capacitor cell (2) is arranged on described insulator (1), it is characterized in that, the top of described capacitor cell (2) is fixedly connected with the flange (4) at described insulator (1) top by compressing structure (3);
Described insulator (1) is imitative type insulator, and the outer of described insulator (1) increases to one end of close described fuel tank gradually near one end of described expander without leave;
Described capacitor cell (2) comprises multiple insulation core (8), each described insulation core (8) is composed in series by several elements (5), the surrounding of each described insulation core (8) is provided with for strengthening fixing cardboard (6), the outside of described cardboard (6) is fixed with strap (7), mounted on top after multiple described insulation core (8) packing.
2. capacitance type potential transformer according to claim 1, is characterized in that, described compressing structure (3) is spring.
3. capacitance type potential transformer according to claim 1 and 2, it is characterized in that, the top of described insulator (1) is tightly connected by described flange (4) and described expander, and the bottom of described insulator (1) is tightly connected by described flange (4) and described fuel tank.
4. capacitance type potential transformer according to claim 3, is characterized in that, is filled with energy absorbing resin between described insulator (1) and described flange (4).
5. capacitance type potential transformer according to claim 4, is characterized in that, described insulator (1) is by cement glue and described flange (4) mucilage binding.
6. the capacitance type potential transformer according to claim 4 or 5, it is characterized in that, described insulator (1) comprises porcelain piece body (11) and full skirt (12), the outer of described porcelain piece body (11) increases to the one end near described fuel tank gradually near one end of described expander without leave, described full skirt (12) comprises large full skirt (121) and little full skirt (122), described large full skirt (121) and little full skirt (122) are arranged alternately in the surface of described porcelain piece body (11) from top to bottom, the distance that described large full skirt (121) stretches out described porcelain piece body (11) is greater than the distance that described little full skirt (122) stretches out described porcelain piece body (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510621909.3A CN105140000A (en) | 2015-09-25 | 2015-09-25 | Capacitive voltage transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510621909.3A CN105140000A (en) | 2015-09-25 | 2015-09-25 | Capacitive voltage transformer |
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| Publication Number | Publication Date |
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| CN105140000A true CN105140000A (en) | 2015-12-09 |
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| CN201510621909.3A Pending CN105140000A (en) | 2015-09-25 | 2015-09-25 | Capacitive voltage transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106516244A (en) * | 2016-12-28 | 2017-03-22 | 江苏思源赫兹互感器有限公司 | Packing device and method of element assembly of capacitor product |
| CN110244100A (en) * | 2019-07-04 | 2019-09-17 | 浙江深华颖智能科技有限公司 | A kind of intelligent depth fusion switch and its production equipment |
| CN113066352A (en) * | 2021-03-31 | 2021-07-02 | 广东电网有限责任公司电力科学研究院 | Capacitive voltage divider for training and defect testing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55128157A (en) * | 1979-03-27 | 1980-10-03 | Tohoku Electric Power Co Inc | Portable current-voltage transformer |
| CN2258311Y (en) * | 1995-10-06 | 1997-07-23 | 西安电力电容器厂 | Current transformer with voltage extractor |
| CN1508819A (en) * | 2002-12-17 | 2004-06-30 | 王日新 | Dry capacitor type voltage transformer |
| CN101299387A (en) * | 2008-03-11 | 2008-11-05 | 徐文 | Combined high-tension current potential transformer |
| CN202258756U (en) * | 2011-10-27 | 2012-05-30 | 上海Mwb互感器有限公司 | Capacitive voltage transformer |
| CN205028751U (en) * | 2015-09-25 | 2016-02-10 | 江苏思源赫兹互感器有限公司 | Capacitance type potential transformer |
-
2015
- 2015-09-25 CN CN201510621909.3A patent/CN105140000A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55128157A (en) * | 1979-03-27 | 1980-10-03 | Tohoku Electric Power Co Inc | Portable current-voltage transformer |
| CN2258311Y (en) * | 1995-10-06 | 1997-07-23 | 西安电力电容器厂 | Current transformer with voltage extractor |
| CN1508819A (en) * | 2002-12-17 | 2004-06-30 | 王日新 | Dry capacitor type voltage transformer |
| CN101299387A (en) * | 2008-03-11 | 2008-11-05 | 徐文 | Combined high-tension current potential transformer |
| CN202258756U (en) * | 2011-10-27 | 2012-05-30 | 上海Mwb互感器有限公司 | Capacitive voltage transformer |
| CN205028751U (en) * | 2015-09-25 | 2016-02-10 | 江苏思源赫兹互感器有限公司 | Capacitance type potential transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106516244A (en) * | 2016-12-28 | 2017-03-22 | 江苏思源赫兹互感器有限公司 | Packing device and method of element assembly of capacitor product |
| CN110244100A (en) * | 2019-07-04 | 2019-09-17 | 浙江深华颖智能科技有限公司 | A kind of intelligent depth fusion switch and its production equipment |
| CN113066352A (en) * | 2021-03-31 | 2021-07-02 | 广东电网有限责任公司电力科学研究院 | Capacitive voltage divider for training and defect testing method thereof |
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Application publication date: 20151209 |