CN105429123A - Overvoltage limiter - Google Patents
Overvoltage limiter Download PDFInfo
- Publication number
- CN105429123A CN105429123A CN201511029805.XA CN201511029805A CN105429123A CN 105429123 A CN105429123 A CN 105429123A CN 201511029805 A CN201511029805 A CN 201511029805A CN 105429123 A CN105429123 A CN 105429123A
- Authority
- CN
- China
- Prior art keywords
- overvoltage limiter
- overvoltage
- linear
- resistance
- low
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/024—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being hermetically sealed
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
- H01C1/084—Cooling, heating or ventilating arrangements using self-cooling, e.g. fins, heat sinks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/044—Physical layout, materials not provided for elsewhere
Abstract
The invention discloses an overvoltage limiter which comprises an upper connecting board and a lower connecting board. A plurality of parallel components are arranged between the upper connecting board and the lower connecting board. Each component comprises a composite outer sleeve. Two ends of the composite outer sleeve are respectively provided with a high-voltage end and a low-voltage end. A gasket which contacts with the high-voltage end is arranged. A linear resistor which contacts with the low-voltage end is arranged. A plurality of nonlinear resistor discs are arranged between the gasket and the linear resistor. The heat conduction coefficient of the parallel components is larger than that of parallel components which are internally provided with air gaps. The overvoltage limiter has advantages of enlarging through flow capacity of the overvoltage limiter, improving current distribution nonuniformity and heat dissipation characteristic among the components, improving power frequency overvoltage resistance, preventing damage of a serial compensation device of a power system by the power frequency overvoltage, and ensuring safe operation of an electric power system.
Description
[technical field]
The invention belongs to overvoltage limiter field, be specifically related to a kind of overvoltage limiter.
[background technology]
Overvoltage limiter is the important protective device of electric power system, for the protection of electric power system series compensation device from superpotential infringement.The characteristic of overvoltage limiter decides the insulation of series compensation device and the cost of equipment, and along with the development of electric power system, the discharge capacity and the insulation coordination of its operational reliability of raising to series compensation device that increase overvoltage limiter are very important.For series compensation device protection overvoltage limiter, due to its restriction power-frequency overvoltage, absorb energy large, need to adopt multicolumn in parallel, there is multicolumn resistor disc column current maldistribution and the integrity problem under power-frequency overvoltage.
[summary of the invention]
The object of the invention is to overcome above-mentioned deficiency, a kind of overvoltage limiter is provided, improving each interelement electric current maldistribution and heat dissipation characteristics, improve the tolerance under power-frequency overvoltage, solving the overvoltage limiter problem that self damages when limiting power-frequency overvoltage.
In order to achieve the above object, the present invention includes upper junction plate and lower connecting plate, between upper junction plate and lower connecting plate, be provided with the element of some parallel connections;
Described element comprises composite sheath, and the two ends of composite sheath are high-pressure side and low-pressure end respectively, contact be provided with pad with high-pressure side, contact be provided with linear resistance with low-pressure end, are provided with some non-linear resistors between pad and linear resistance.
Silicon rubber is filled with in described composite sheath.
Described upper junction plate and lower connecting plate adopt metal material.
Described non-linear resistor is zinc oxide resistance sheet, and linear resistance is carbon ceramics resistance.
Described composite sheath adopts expoxy glass wire material and silastic material.
Described pad adopts metal material.
Described non-linear resistor is provided with six.
Described pad, non-linear resistor and linear resistance are encapsulated in composite sheath by high-pressure side and low-pressure end.
Compared with prior art, the present invention is made up of multiple element in parallel, and element is by upper lower connecting plate composition overvoltage limiter, element is by several non-linear resistors and linear resistance series connection closed assembly group, by high-pressure side and low-pressure end, non-linear resistor and linear resistance are encapsulated in composite sheath, and inner filled silicon rubber, the thermal conductivity ratio inside of parallel element has the conductive coefficient of the parallel element of air-gap to increase, this device increases the discharge capacity of overvoltage limiter, improve each interelement electric current maldistribution and heat dissipation characteristics, improve the ability of tolerance power-frequency overvoltage, make the infringement of series compensation device from power-frequency overvoltage of electric power system, ensure safe operation of power system.
[accompanying drawing explanation]
Fig. 1 is front view of the present invention;
Fig. 2 is vertical view of the present invention;
Fig. 3 is the structural representation of element of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, the present invention will be further described.
See Fig. 1, Fig. 2 and Fig. 3, the present invention includes upper junction plate 1 and lower connecting plate 3, between upper junction plate 1 and lower connecting plate 3, be provided with the element 2 of some parallel connections; Element 2 comprises composite sheath 7, the two ends of composite sheath 7 are high-pressure side 4 and low-pressure end 9 respectively, contact with high-pressure side 4 and be provided with pad 5, contact with low-pressure end 9 and be provided with linear resistance 8, some non-linear resistors 6 are provided with between pad 5 and linear resistance 8, adopt global formation and fill adhesive process, one-shot forming composite sheath 7 and inner filled silicon rubber, pad 5, non-linear resistor 6 and linear resistance 8 are encapsulated in composite sheath 7 by high-pressure side 4 and low-pressure end 9.
Upper junction plate 1 and lower connecting plate 3 adopt metal material, and non-linear resistor 6 is zinc oxide resistance sheet, and linear resistance 8 is carbon ceramics resistance, and composite sheath 7 adopts expoxy glass wire material and silastic material, and pad 5 adopts metal material.
Preferably, non-linear resistor 6 is provided with six.
Element 2 is provided with high-pressure side 4 and low-pressure end 9, element 2 to be connected closed assembly group by six non-linear resistors, 6, linear resistance 8 and a pad 5, by high-pressure side 4 and low-pressure end 9, non-linear resistor 6, linear resistance 8 and pad 5 are encapsulated in composite sheath 7, adopt global formation and fill adhesive process, one-shot forming composite sheath 7 and inner filled silicon rubber, the conductive coefficient of element 2 increases, and the conductive coefficient of element 2 has the conductive coefficient of the 0.023W/ of air-gap element (m.k) to be increased to 0.27W/ (m.k) from inside.The resistance of linear resistance 8 is 1% ~ 5% of nonlinear resistance value under overvoltage limiter coordinates electric current, and this improves the current distribution characteristic of parallel element.
Claims (8)
1. an overvoltage limiter, is characterized in that: comprise upper junction plate (1) and lower connecting plate (3), is provided with the element (2) of some parallel connections between upper junction plate (1) and lower connecting plate (3);
Described element (2) comprises composite sheath (7), the two ends of composite sheath (7) are high-pressure side (4) and low-pressure end (9) respectively, contact with high-pressure side (4) and be provided with pad (5), contact with low-pressure end (9) and be provided with linear resistance (8), between pad (5) and linear resistance (8), be provided with some non-linear resistors (6).
2. a kind of overvoltage limiter according to claim 1, is characterized in that: described composite sheath is filled with silicon rubber in (7).
3. a kind of overvoltage limiter according to claim 1, is characterized in that: described upper junction plate (1) and lower connecting plate (3) adopt metal material.
4. a kind of overvoltage limiter according to claim 1, is characterized in that: described non-linear resistor (6) is zinc oxide resistance sheet, and linear resistance (8) is carbon ceramics resistance.
5. a kind of overvoltage limiter according to claim 1, is characterized in that: described composite sheath (7) adopts expoxy glass wire material and silastic material.
6. a kind of overvoltage limiter according to claim 1, is characterized in that: described pad (5) adopts metal material.
7. a kind of overvoltage limiter according to claim 1, is characterized in that: described non-linear resistor (6) is provided with six.
8. a kind of overvoltage limiter according to claim 1, is characterized in that: described pad (5), non-linear resistor (6) and linear resistance (8) are encapsulated in composite sheath (7) by high-pressure side (4) and low-pressure end (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029805.XA CN105429123A (en) | 2015-12-31 | 2015-12-31 | Overvoltage limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029805.XA CN105429123A (en) | 2015-12-31 | 2015-12-31 | Overvoltage limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105429123A true CN105429123A (en) | 2016-03-23 |
Family
ID=55507141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511029805.XA Pending CN105429123A (en) | 2015-12-31 | 2015-12-31 | Overvoltage limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105429123A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393666A (en) * | 2017-06-05 | 2017-11-24 | 南阳中祥电力电子有限公司 | A kind of Split high pressure series compensation damps MOV |
| CN111635257A (en) * | 2020-06-05 | 2020-09-08 | 西安交通大学 | Carbon ceramic linear resistance porous high-resistance coating and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293888Y (en) * | 1997-03-14 | 1998-10-07 | 郑州铁路局西安计量管理所 | Organic compound sleeve spaceless metallic oxide lightning arrester |
| US5982597A (en) * | 1997-03-06 | 1999-11-09 | Webb; Rommie Fred | Shorting fusable metal oxide varistor |
| CN102982930A (en) * | 2012-11-14 | 2013-03-20 | 中国电力科学研究院 | Metal oxide varistor (MOV) string resistor type damping resistor for extra-high voltage series compensation |
| CN204290193U (en) * | 2014-12-27 | 2015-04-22 | 中国西电电气股份有限公司 | A kind of electric cable protector |
| CN204288988U (en) * | 2014-12-27 | 2015-04-22 | 中国西电电气股份有限公司 | A kind of 750kV lightning arrester |
| CN104599799A (en) * | 2014-12-27 | 2015-05-06 | 中国西电电气股份有限公司 | High-capacity overvoltage limiter core |
| CN104600689A (en) * | 2014-12-27 | 2015-05-06 | 中国西电电气股份有限公司 | Over-voltage limiter core body |
-
2015
- 2015-12-31 CN CN201511029805.XA patent/CN105429123A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5982597A (en) * | 1997-03-06 | 1999-11-09 | Webb; Rommie Fred | Shorting fusable metal oxide varistor |
| CN2293888Y (en) * | 1997-03-14 | 1998-10-07 | 郑州铁路局西安计量管理所 | Organic compound sleeve spaceless metallic oxide lightning arrester |
| CN102982930A (en) * | 2012-11-14 | 2013-03-20 | 中国电力科学研究院 | Metal oxide varistor (MOV) string resistor type damping resistor for extra-high voltage series compensation |
| CN204290193U (en) * | 2014-12-27 | 2015-04-22 | 中国西电电气股份有限公司 | A kind of electric cable protector |
| CN204288988U (en) * | 2014-12-27 | 2015-04-22 | 中国西电电气股份有限公司 | A kind of 750kV lightning arrester |
| CN104599799A (en) * | 2014-12-27 | 2015-05-06 | 中国西电电气股份有限公司 | High-capacity overvoltage limiter core |
| CN104600689A (en) * | 2014-12-27 | 2015-05-06 | 中国西电电气股份有限公司 | Over-voltage limiter core body |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393666A (en) * | 2017-06-05 | 2017-11-24 | 南阳中祥电力电子有限公司 | A kind of Split high pressure series compensation damps MOV |
| CN107393666B (en) * | 2017-06-05 | 2019-03-29 | 南阳中祥电力电子有限公司 | A kind of Split high pressure series compensation damping MOV |
| CN111635257A (en) * | 2020-06-05 | 2020-09-08 | 西安交通大学 | Carbon ceramic linear resistance porous high-resistance coating and preparation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160323 |
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| WD01 | Invention patent application deemed withdrawn after publication |