CN101847477B - Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester - Google Patents
Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester Download PDFInfo
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- CN101847477B CN101847477B CN 200910010888 CN200910010888A CN101847477B CN 101847477 B CN101847477 B CN 101847477B CN 200910010888 CN200910010888 CN 200910010888 CN 200910010888 A CN200910010888 A CN 200910010888A CN 101847477 B CN101847477 B CN 101847477B
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- lightning arrester
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- high voltage
- arrester
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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Abstract
The invention provides an ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester. The problem to be solved by the invention is that the lightning arrester used at present is formed by connecting four and less than four lightning arrester elements in series to be fixed on a base; and due to the limited energy absorption and protective properties, the present lightning arrester can not be applicable to alternating-current ultra-high voltage power grids. The invention is characterized in that the lightning arrester is composed of five lightning arrester elements which are connected in series; the top end of the lightning arrester is provided with an equalizing ring; the interior of the lightning arrester adopts a structure of four-column resistor piles which are connected in parallel; the four-column resistor piles in each element are divided into five groups through current-equalizing connecting plates; and the interior of each lightning arrester element is provided with a parallel capacitor bank, wherein the upper section is connected with the four-column capacitor in parallel, the upper two sections are connected with a five-column capacitor in parallel, and the upper three sections are connected with a two-column capacitor in parallel. The invention is applicable to 1000-kilovolt alternating-current ultra-high voltage power transmission engineering.
Description
Technical field
The invention belongs to the extra-high-voltage alternating current zinc oxide arrester, what be specifically related to is the porcelain bushing type zero-clearance zinc oxide lightning arrester that can be applicable to 1000 kilovolts of AC extra high voltage power transmission engineerings.
Background technology
In order further to optimize the electric power resource configuration, China will build 1000 kilovolts of AC extra high voltage electrical networks, realize that the electric power of trans-regional long-distance large-range is carried, and reduce electric quantity loss.1000 kilovolts of AC extra high voltage lightning arresters will have: absorb that energy is big, protective feature good, long-time running that can safety and stability.The lightning arrester that in 750 kilovolts and following interchange EHV transmission engineering, uses at present, generally be by four joints and below the unit of an arrester series connection after constitute, unit of an arrester inside is single-column resistor disc post.Limited because of its energy absorption and protective value, can't be applicable to the AC extra high voltage electrical network.
Summary of the invention
The object of the present invention is to provide a kind of ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester.
The objective of the invention is to realize like this: comprise unit of an arrester, grading ring and base, it is characterized in that: it has five joint unit of an arrester to be composed in series, and every joint element internal has the parallel connection of four columnar resistance sheet posts, is separated by backing plate between the element.
For the absorption energy that strengthens outfit of equipment improves protective value with reduction equipment residual voltage; The inner four columnar resistance sheet parallel-connection structures that adopt of lightning arrester; Four columnar resistance sheets in every joint element are divided into five groups by the current-sharing connecting plate; Because adopt the parallel connection of multicolumn resistor disc, it is very important making the mean allocation that flows through the resistor disc column current.Because the voltage on every layer of resistor disc post is all identical, so the distribution of energy equals to flow through the distribution of resistor disc column current; Simultaneously, the protection level is to be determined by the residual voltage that flows through that maximum post of resistor disc column current, so CURRENT DISTRIBUTION just can make the equipment protection performance better uniformly.We have adopted the method for accurate combo and one by one inspection, have guaranteed that current distribution factor is less than 1.08;
Lightning arrester voltage distributes directly influences the useful life of lightning arrester; Owing to be applicable to that the height overall of the lightning arrester of 1000 kilovolts of AC extra high voltage power transmission engineerings reaches nearly 13 meters; This makes its stray electrical current over the ground more inhomogeneous; How to select the grading ring structure to mend with parallel connection and taste electric capacity, it is just particularly important that its voltage is evenly distributed.The present invention is employed in element internal parallel equalizing capacitor and outside grading ring dual mode and reaches and all press purpose; Specifically: Shunt Capacitor Unit is arranged in unit of an arrester inside; Wherein go up the parallelly connected four post capacitors of a joint, the parallelly connected five post capacitors of last two joints, last three joint and di-post capacitors.
Compared with prior art, the invention has the beneficial effects as follows: energy absorption improves significantly, and Potential distribution is more even, has improved the protective value of lightning arrester greatly, is applicable to 1000 kilovolts of AC extra high voltage power transmission engineerings fully.
Description of drawings
Further specify the present invention below in conjunction with accompanying drawing.
Fig. 1 is a sketch map of the present invention.
Fig. 2 is the structural representation of a joint unit of an arrester.
Fig. 3 is the installation diagram of the capacitor among Fig. 2.
Embodiment
Referring to Fig. 1, lightning arrester assembly height 13125mm, the height 2360mm of every joint unit of an arrester 2, maximum exumbrella footpath φ 750mm, gross weight 7500kg.Lightning arrester is made up of the separate element connected in series of five joints, is separated by backing plate between every joint element, and a grading ring 1 is equipped with on the lightning arrester top, and the bottom fixes through insulator foot and basis.
Grading ring is the Fourth Ring three-decker, and material is an aluminium alloy.Maximum loop external diameter φ 3660mm, submerged depth 2300mm, aluminum pipe external diameter φ 200mm.
Referring to Fig. 2, inner four posts, φ 136mm resistor disc 3 parallel-connection structures of adopting of lightning arrester, four columnar resistance sheets in every joint element are divided into five groups by current-sharing connecting plate 4; Every group by the connect four posts parallel connection of 8-9 sheet, to guarantee that current distribution factor is less than 1.08.
Referring to Fig. 3, in last three joint unit of an arrester inside Shunt Capacitor Unit 5 is arranged, specifically: wherein go up the parallelly connected four post capacitors 51 of a joint, 40 ceramic capacitors of every post; The parallelly connected five post capacitors of last two joints, 43 ceramic capacitors of every post; Last three joint and di-post capacitors, 40 ceramic capacitors of every post.
Performance of the present invention such as following table
The present invention has improved the equipment protection level in 1000 kilovolt high-voltage AC transmission engineerings, reduced the external insulation level of main equipments such as transformer, has guaranteed the security reliability of transmission system and the reliability of long-time running.
Claims (3)
1. a ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester comprises unit of an arrester, grading ring and base, it is characterized in that: it has five joint unit of an arrester to be composed in series, and is separated by backing plate between every joint element, on the top of lightning arrester grading ring is housed;
The inner four columnar resistance sheet parallel-connection structures that adopt of lightning arrester, four columnar resistance sheets in every joint element are divided into five groups by the current-sharing connecting plate;
In unit of an arrester inside Shunt Capacitor Unit is arranged, the top first segment parallel connection four post capacitors of five joints in the unit of an arrester wherein, above the parallelly connected five post capacitors of second joint, above the 3rd joint and di-post capacitor.
2. according to the described ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester of claim 1, it is characterized in that: first segment parallel connection four post capacitors above said, 40 ceramic capacitors of every post; Above second the joint parallelly connected five post capacitors, 43 ceramic capacitors of every post; Above the 3rd the joint and di-post capacitor, 40 ceramic capacitors of every post.
3. according to claim 1 or 2 described ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arresters, it is characterized in that: said grading ring is the Fourth Ring three-decker, and material is an aluminium alloy, maximum loop external diameter φ 3660mm, submerged depth 2300mm, aluminum pipe external diameter φ 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910010888 CN101847477B (en) | 2009-03-27 | 2009-03-27 | Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910010888 CN101847477B (en) | 2009-03-27 | 2009-03-27 | Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester |
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| Publication Number | Publication Date |
|---|---|
| CN101847477A CN101847477A (en) | 2010-09-29 |
| CN101847477B true CN101847477B (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910010888 Active CN101847477B (en) | 2009-03-27 | 2009-03-27 | Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539962B (en) * | 2011-12-21 | 2014-02-26 | 南阳金冠电气有限公司 | Method for measuring non-uniform current distribution coefficient range of parallel multi-resistor piles |
| CN102565580B (en) * | 2011-12-21 | 2014-02-26 | 南阳金冠电气有限公司 | Measurement method of coefficient of uniformity of current distribution of multi-column parallel resistance chip columns |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3417648A1 (en) * | 1984-04-13 | 1985-10-17 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | Overvoltage suppressor |
| CN201113419Y (en) * | 2007-09-14 | 2008-09-10 | 西安电力机械制造公司 | Ultra-high voltage porcelain bushing type lightning arrestor |
| CN201374227Y (en) * | 2009-03-27 | 2009-12-30 | 抚顺电瓷制造有限公司 | Ultra-high-voltage porcelain-bushing gapless zinc oxide arrester |
-
2009
- 2009-03-27 CN CN 200910010888 patent/CN101847477B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3417648A1 (en) * | 1984-04-13 | 1985-10-17 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | Overvoltage suppressor |
| CN201113419Y (en) * | 2007-09-14 | 2008-09-10 | 西安电力机械制造公司 | Ultra-high voltage porcelain bushing type lightning arrestor |
| CN201374227Y (en) * | 2009-03-27 | 2009-12-30 | 抚顺电瓷制造有限公司 | Ultra-high-voltage porcelain-bushing gapless zinc oxide arrester |
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| CN101847477A (en) | 2010-09-29 |
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