CN102354598B - Capacitive divider with medium voltage positioned at high-voltage side - Google Patents
Capacitive divider with medium voltage positioned at high-voltage side Download PDFInfo
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- CN102354598B CN102354598B CN 201110180243 CN201110180243A CN102354598B CN 102354598 B CN102354598 B CN 102354598B CN 201110180243 CN201110180243 CN 201110180243 CN 201110180243 A CN201110180243 A CN 201110180243A CN 102354598 B CN102354598 B CN 102354598B
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Abstract
The invention provides a capacitive divider with medium voltage positioned at the high-voltage side, which comprises a shell, the bottom of the shell is connected with a base, the top of the shell is connected with a cover, an expander is mounted on the bottom in the shell, and is connected with the base, a core is connected with the expander, the upper part of the core is connected with a capacitor C2, the cover is connected with a medium-voltage sleeve, the capacitor C2 is led to the medium-voltage sleeve from the upper part of the core, a low-voltage terminal of the capacitive divider is led out via a low-voltage sleeve mounted on the base, and the tapped medium voltage is positioned at the high-voltage end of the capacitive divider. Since the medium voltage tapped by the capacitive divider is positioned at the high-voltage side of the capacitive divider, the requirement of clients is met.
Description
Technical field
The present invention relates to a kind of AC transmission system voltage measuring apparatus, particularly a kind of intermediate voltage is positioned on high-tension side capacitor voltage divider.
Background technology
Capacitor voltage divider is exactly to take out a voltage signal between high pressure and low pressure, to reach the purpose of high voltage measuring.
Existing capacitor voltage divider adopts stacked structure, and namely capacitor voltage divider is stacked in and forms the open side type structure on the base.Intermediate voltage terminal of the low-voltage terminal of capacitor voltage divider and extraction all by be installed on the base in, low-tension bushing draws, intermediate voltage terminal is positioned at the product bottom.This structure is that existing capacitor voltage divider product is general.Its middle pressure signal that utilizes is taken from low-voltage terminal and intermediate voltage terminal.
Yet because some cause specifics, having over the ground such as series compensation device in the electric power system etc. in the device of insulating requirements has some equipment to need power supply, because equipment is in the system high pressure end, insulation against ground requires very high, can't use normal power supplies, for this reason, need to increase power supply at the high-pressure side of system.Like this, aforementioned existing capacitor voltage divider can not satisfy this demand.
For capacitor, the intermediate voltage of all capacitor voltage dividers all is to draw from the medium-tension bushing that is installed in base by intermediate voltage terminal, the development of self-capacitance voltage divider all is so in decades, therefore, and when the client proposes the demand, for the technical staff in the capacitor area, think that all this is impossible realize, yet the inventor herein is through making great efforts constantly and research, propose patent scheme of the present invention, can satisfy above-mentioned client's demand.
Summary of the invention
The invention provides a kind of intermediate voltage of in high-pressure side extracts, pressing and be positioned on high-tension side capacitor voltage divider, to meet customer need.
The technical solution adopted in the present invention is: a kind of intermediate voltage is positioned on high-tension side capacitor voltage divider, comprise shell, outer casing bottom is connected with base, cover top portion is connected with lid, the bottom of described enclosure is equipped with expander, described expander is connected with base, be connected with fuse on the expander, fuse top is connected with capacitor C 2, be connected with medium-tension bushing on the described lid, described capacitor C 2 is drawn out on the described medium-tension bushing by the top of fuse, and the low-voltage terminal of described capacitor voltage divider is drawn by the low-tension bushing that is installed on the base, and the intermediate voltage of extraction is positioned at the high-pressure side of capacitor voltage divider.
Described shell adopts silicone rubber sleeve.
Described capacitor C 2 usefulness insulating papers coat, its end face and the isolation of middle pressure lead-out wire.
Add multilayer insulation between described fuse top and the medium-tension bushing.
Described medium-tension bushing adopts bushing insulator.
Intermediate voltage of the present invention is positioned on high-tension side capacitor voltage divider and has the following advantages at least: expander of the present invention is placed on sleeve bottom and is connected with base, fuse is fixed on the expander, capacitor C 2 is drawn out to the medium-tension bushing that covers by fuse top, medium-tension bushing is fixed on and covers, the low-voltage terminal N of capacitor voltage divider draws by the low-tension bushing that is installed on the base, like this, the intermediate voltage of extraction is in the high-pressure side of product.Can be in electric power system series compensation device etc. have over the ground the device of insulating requirements that measuring-signal is provided in the high-pressure side or between high-pressure side and intermediate voltage terminal the access transformer provide power supply or measuring-signal on high-tension side equipment.
Description of drawings
Fig. 1 is the structural representation of the capacitor voltage divider of routine;
Fig. 2 is the structural representation of capacitor voltage divider of the present invention.
Embodiment
Conventional capacitor voltage divider product structure is seen Fig. 1.The shell of capacitor voltage divider is generally high voltage electric porcelain sleeve, internal structure generally is: fuse 3 directly is fixed on the base 1, expander 4 is placed at the top of fuse 3, fuse 3 all is immersed in the insulating oil with expander 4, the capacitor C 2 of being drawn by the fuse bottom leads to the outside by the medium-tension bushing 2 that is installed on the base 1, and the low-voltage terminal N of capacitor voltage divider draws by the low-tension bushing 5 that is installed on the base 1.Like this, intermediate voltage is in the low-pressure end of product.
Capacitor voltage divider of the present invention comprises shell, outer casing bottom is connected with base 1, cover top portion is connected with lid, the bottom of described enclosure is equipped with expander 4, described expander 4 is connected with base 1, be connected with fuse 3 on the expander 4, fuse 3 tops are connected with capacitor C 2, be connected with medium-tension bushing 2 on the described lid, described capacitor C 2 is drawn out on the described medium-tension bushing by the top of fuse, the low-voltage terminal of described capacitor voltage divider is drawn by the low-tension bushing 5 that is installed on the base, and the intermediate voltage of extraction is positioned at the high-pressure side of capacitor voltage divider.
Described shell adopts silicone rubber sleeve, expander 4 is placed on sleeve bottom and is connected with base 1, and fuse 3 is fixed on the expander 4, and capacitor C 2 is drawn out to the medium-tension bushing 2 that covers by fuse top, medium-tension bushing 2 is fixed on and covers, and the intermediate voltage of extraction is in the high-pressure side of product.The low-voltage terminal N of capacitor voltage divider draws by the low-tension bushing 5 that is installed on the base.
For the capacitor voltage divider of routine, to draw from low-pressure side because of the intermediate voltage that extracts, its inner capacitor body is fixed on the low-pressure side cover plate, and the connecting line of intermediate voltage terminal can connect to refill and fit in the sleeve pipe, and inner dilator is in top and high-pressure side.Intermediate voltage terminal of this mode is easy to solve to the insulation of low-voltage terminal, need not do too much consideration.
And for intermediate voltage when high-pressure side is drawn, the Insulation Problems of capacitor voltage divider inside is most important, middle pressure of the present invention is positioned at the high-pressure side, and (110/ √ 3kV) draws the intermediate voltage of extraction (10kV) from the high-pressure side, and namely the intermediate voltage of nominal is 10kV between HV Terminal and intermediate voltage terminal.To this, at first change in internal structure, expander has been placed on the bottom, fuse is fixed on the expander cover, in the insulation of inside, considers that the intermediate voltage lead-out wire that extracts at fuse needs to lead in the air by medium-tension bushing, at first adopt the mode of capacitor C 2 set of pieces being carried out integral insulation, the C2 set of pieces is all risen with the insulation paper bag, make the isolation of element end face and middle pressure lead-out wire, guarantee safety; Secondly because medium-tension bushing lower end and fuse top (high-pressure side) near distance, voltage pressure reduction herein is large, easily mutually discharge when coming into operation, cause damage of product, so the insulation of this part is most important, adopt the method that between fuse top and medium-tension bushing, installs multilayer insulation additional herein, utilize insulating barrier that two ends are thoroughly blocked, remove a hidden danger.In the insulation externally, consider that intermediate voltage terminal need be exposed in the air now, so adopted the high high voltage electric porcelain sleeve of dielectric strength, play good insulating effect.
The above only is one embodiment of the present invention, it or not whole or unique execution mode, the conversion of any equivalence that those of ordinary skills take technical solution of the present invention by reading specification of the present invention is claim of the present invention and contains.
Claims (5)
1. an intermediate voltage is positioned on high-tension side capacitor voltage divider, it is characterized in that: comprise shell, outer casing bottom is connected with base (1), cover top portion is connected with lid, the bottom of described enclosure is equipped with expander (4), described expander (4) is connected with base, be connected with fuse (3) on the expander (4), fuse (3) top is connected with capacitor C 2, be connected with medium-tension bushing (2) on the described lid, described capacitor C 2 is drawn out on the described medium-tension bushing (2) by the top of fuse (3), and the low-voltage terminal of described capacitor voltage divider is drawn by the low-tension bushing (5) that is installed on the base, and the intermediate voltage of extraction is positioned at the high-pressure side of capacitor voltage divider.
2. a kind of intermediate voltage as claimed in claim 1 is positioned on high-tension side capacitor voltage divider, it is characterized in that: described shell adopts silicone rubber sleeve.
3. a kind of intermediate voltage as claimed in claim 1 is positioned on high-tension side capacitor voltage divider, it is characterized in that: described capacitor C 2 usefulness insulating papers coat, its end face and the isolation of middle pressure lead-out wire.
4. a kind of intermediate voltage as claimed in claim 3 is positioned on high-tension side capacitor voltage divider, it is characterized in that: add multilayer insulation between described fuse top and the medium-tension bushing.
5. a kind of intermediate voltage as claimed in claim 4 is positioned on high-tension side capacitor voltage divider, it is characterized in that: described medium-tension bushing adopts bushing insulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110180243 CN102354598B (en) | 2011-06-30 | 2011-06-30 | Capacitive divider with medium voltage positioned at high-voltage side |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110180243 CN102354598B (en) | 2011-06-30 | 2011-06-30 | Capacitive divider with medium voltage positioned at high-voltage side |
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| CN102354598A CN102354598A (en) | 2012-02-15 |
| CN102354598B true CN102354598B (en) | 2013-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600108161A1 (en) * | 2016-10-26 | 2018-04-26 | Tesmec Spa | VOLTAGE AND VOLTAGE CURRENT MEASURING DEVICE IN MEDIUM VOLTAGE ACCESSORIES |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810873A (en) * | 2012-08-28 | 2012-12-05 | 西安布伦帕电力无功补偿技术有限公司 | Stable power supply equipment for series compensation device and control and protection system thereof |
| CN103595291A (en) * | 2013-11-22 | 2014-02-19 | 国家电网公司 | On-line energy-gaining system of high-voltage series voltage compensation device |
| CN112151266B (en) * | 2020-10-23 | 2024-07-05 | 陕西正泰互感器科技有限公司 | Device for reducing temperature coefficient of capacitor and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508819A (en) * | 2002-12-17 | 2004-06-30 | 王日新 | Dry capacitor type voltage transformer |
| CN201072701Y (en) * | 2007-08-15 | 2008-06-11 | 无锡市锡容电力电器厂 | Capacitive potential divider |
| CN101299387A (en) * | 2008-03-11 | 2008-11-05 | 徐文 | Combined high-tension current potential transformer |
| CN201877276U (en) * | 2010-11-15 | 2011-06-22 | 河南省电力公司许昌供电公司 | Gas-insulating electronic voltage transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7325285B2 (en) * | 2004-05-28 | 2008-02-05 | Maxwell Technologies, Inc. | Method of processing high voltage capacitors |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508819A (en) * | 2002-12-17 | 2004-06-30 | 王日新 | Dry capacitor type voltage transformer |
| CN201072701Y (en) * | 2007-08-15 | 2008-06-11 | 无锡市锡容电力电器厂 | Capacitive potential divider |
| CN101299387A (en) * | 2008-03-11 | 2008-11-05 | 徐文 | Combined high-tension current potential transformer |
| CN201877276U (en) * | 2010-11-15 | 2011-06-22 | 河南省电力公司许昌供电公司 | Gas-insulating electronic voltage transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600108161A1 (en) * | 2016-10-26 | 2018-04-26 | Tesmec Spa | VOLTAGE AND VOLTAGE CURRENT MEASURING DEVICE IN MEDIUM VOLTAGE ACCESSORIES |
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| CN102354598A (en) | 2012-02-15 |
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