CN201122475Y - Direct current arrester - Google Patents
Direct current arrester Download PDFInfo
- Publication number
- CN201122475Y CN201122475Y CN 200720126450 CN200720126450U CN201122475Y CN 201122475 Y CN201122475 Y CN 201122475Y CN 200720126450 CN200720126450 CN 200720126450 CN 200720126450 U CN200720126450 U CN 200720126450U CN 201122475 Y CN201122475 Y CN 201122475Y
- Authority
- CN
- China
- Prior art keywords
- direct current
- lightning arrester
- insulating cylinder
- lightening arrestor
- hanging plate
- 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.)
- Expired - Lifetime
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Classifications
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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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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
Abstract
The utility model discloses a direct current lightening arrestor for the protecting the converter valve in a converter station of an extra high voltage direct current transmission project. The direct current lightening arrestor comprises shielding rings and at least two lightening arrestor units. The direct current lightening arrestor is characterized in that the lightening arrestor unit is connected into an upper section and a lower section, and an upper hanging plate is fixed at the upper end of the upper section; a lower hanging plate is fixed at the lower end of the lower section, and the lightening arrestor can be installed in a suspending way through the upper hanging plate and the lower hanging plate; the shielding rings are arranged on the periphery of the upper hanging plate and the lower hanging plate, and on the periphery of the connecting part of the upper section and the lower section of the lightening arrestor. The epoxy glass cylinder with high insulating performance can be adopted to be as a compound insulating cylinder by the direct current lightening arrestor, as well as the encapsulating process and the technology mean that the zinc ring is added at the end cover part are adopted at the inner part of the lightening arrestor, the direct current lightening arrestor has the advantages that the electricity-resistant intensity is high, the quantity of the local electricity discharging is less, the leakage electric current is low, the amount of the ionic migration is less, the mechanical intensity is high, and the stability and the security of the lightening arrestor for a long-term operation under the direct current electric field is ensured.
Description
Technical field
The utility model relates to a kind of High-Voltage Electrical Appliances protection equipment, the direct current lightning arrester of converter valve protection usefulness in particularly a kind of super high voltage direct current electricity transmission engineering current conversion station.
Background technology
The direct current lightning arrester is the important protective device of the various electric equipments of DC transmission system, and it is parallel to the electric equipment next door of being protected, and is used to prevent that institute's protection electric equipment from suffering thunder and lightning to involve the operation wave impact.
Present used gapless metal-oxide lighting arrester mostly is AC system greatly and uses; it can not be used to protect direct current system; and in the super high voltage direct current electricity transmission engineering; because the operation characteristic of lightning arrester is different from alternating-current field in dc fields; the voltage waveform that lightning arrester bore is the dc waveform that contains each harmonic, so the direct current lightning arrester has many problems to need to solve at aspects such as the selecting for use of material, structure Design.
Summary of the invention
The special DC lightning arrester of the interior converter valve protection of a kind of ± 800kV super high voltage direct current electricity transmission engineering current conversion station that the purpose of this utility model provides, for this reason, the technical scheme that the utility model is taked is given and is:
A kind of direct current lightning arrester comprises shading ring, at least two lightning arrester unit, it is characterized in that described lightning arrester unit is connected to upper and lower two joints, and last joint upper end is fixed with upper hanging plate; Under save the lower end and be fixed with down link plate, by this link plate up and down, lightning arrester can hang installation; Be provided with described shading ring around the upper and lower link plate and around the upper and lower joint junction, lightning arrester unit.
According to technique scheme, described lightning arrester unit is four, and per two compose in parallel a joint.Described each lightning arrester unit includes insulating cylinder, be arranged on the resistor disc of vertically folding in outer full skirt of insulating cylinder and the insulating cylinder, and insulating cylinder two ends up and down is provided with end cap resistor disc is encapsulated in the insulating cylinder.Described insulating cylinder is the composite material insulating cylinder that glass fiber and epoxy resin are made.Described insulating cylinder end cap is provided with the zinc ring.Radially have explosionproof hole in both sides at insulating cylinder.
The utility model has the advantages that, lightning arrester has adopted high insulating property epoxy fibreglass tube as the compound inslation tube, and the inner dosing technology that adopts of lightning arrester, lightning arrester is in technological means such as end caps zincification rings, its electric strength height, partial discharge quantity is little, and leakage current is little, ion migration amount is little, high mechanical strength.The stability and the fail safe of the long-time running of lightning arrester under DC electric field have been guaranteed.
On blast resistance construction, lightning arrester adopts the insulating cylinder side that explosionproof hole pressure releasing structure is set, and has increased the sectional area of gas communication simultaneously, has reduced time delay of action, has guaranteed that lightning arrester pressure discharges reliably, action accurately.
Description of drawings
Fig. 1 Fig. 2 is respectively the front view and the vertical view of the utility model lightning arrester.
Fig. 3 is the cutaway view of lightning arrester unit among Fig. 1.
Fig. 4 is the cutaway view of insulating cylinder among Fig. 3.
Among the figure: 1, upper hanging plate; 2, shading ring; 3, lightning arrester unit; 4, following link plate; 5, zinc ring; 6, end cap; 7, insulating cylinder; 8, full skirt; 9, resistor disc; 10, anti-riot hole.
Embodiment
Shown in Figure 2 as Fig. 1; a kind of direct current lightning arrester that is used to protect direct current system current conversion station converter valve; comprise by link plate 1,4 up and down; shading ring 2 and four lightning arrester unit 3 that have silicon rubber full skirt 8 constitute; in this structure, per two lightning arrester unit 3 compose in parallel a joint and are interconnected to up and down two joints, and last joint upper end is connected with link plate 1,4 up and down by bolt respectively with the following lower end of saving; by link plate 1,4 about this, lightning arrester can hang installation.Around the upper and lower link plate 1,4 and 3 upper and lower joint junctions, lightning arrester unit are provided with shading ring 2 on every side.Above lightning arrester unit 3 also can be formed by eight according to the design needs of lightning arrester capacity, like this with regard to per four and be unified into a joint.
As shown in Figure 3, each lightning arrester unit 3 includes the composite material insulating cylinder 7 made with glass fiber and epoxy resin, is arranged on the vertical resistor disc 9 that falls folded in outer full skirt 8 of insulating cylinder and the insulating cylinder 7.Insulating cylinder is provided with end cap 6 resistor disc 9 is encapsulated in the insulating cylinder in two ends about in the of 7, and the insulating cement can sealing technique is adopted in encapsulation.Also zinc ring 5 can be provided with on the described insulating cylinder end cap 6, the galvano-cautery of two end cap 6 can be prevented.On blast resistance construction, insulating cylinder 7 radially both sides has explosionproof hole 10, can make lightning arrester under unexpected failure condition, the safe release internal pressure.
Claims (6)
1. a direct current lightning arrester comprises shading ring, at least two lightning arrester unit, it is characterized in that described lightning arrester unit is connected to upper and lower two joints, and last joint upper end is fixed with upper hanging plate; Under save the lower end and be fixed with down link plate, by this link plate up and down, lightning arrester can hang installation; Be provided with described shading ring around the upper and lower link plate and around the upper and lower joint junction, lightning arrester unit.
2. direct current lightning arrester as claimed in claim 1 is characterized in that, described lightning arrester unit is four, and per two compose in parallel a joint.
3. direct current lightning arrester as claimed in claim 1, it is characterized in that, described each lightning arrester unit includes insulating cylinder, be arranged on the resistor disc of vertically folding in outer full skirt of insulating cylinder and the insulating cylinder, and insulating cylinder two ends up and down is provided with end cap resistor disc is encapsulated in the insulating cylinder.
4. direct current lightning arrester as claimed in claim 3 is characterized in that, described insulating cylinder is the composite material insulating cylinder that glass fiber and epoxy resin are made.
5. direct current lightning arrester as claimed in claim 3 is characterized in that described end cap is provided with the zinc ring.
6. as claim 3 or 4 described direct current lightning arresters, it is characterized in that, radially have explosionproof hole in both sides at insulating cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720126450 CN201122475Y (en) | 2007-11-21 | 2007-11-21 | Direct current arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720126450 CN201122475Y (en) | 2007-11-21 | 2007-11-21 | Direct current arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201122475Y true CN201122475Y (en) | 2008-09-24 |
Family
ID=40009711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720126450 Expired - Lifetime CN201122475Y (en) | 2007-11-21 | 2007-11-21 | Direct current arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201122475Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917836A (en) * | 2010-07-16 | 2010-12-15 | 中国电力科学研究院 | Shielding device applied to high voltage direct current converter valve |
| CN102692581A (en) * | 2012-06-19 | 2012-09-26 | 国电大渡河检修安装有限公司 | Current leakage test method for lightning arrestor |
-
2007
- 2007-11-21 CN CN 200720126450 patent/CN201122475Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917836A (en) * | 2010-07-16 | 2010-12-15 | 中国电力科学研究院 | Shielding device applied to high voltage direct current converter valve |
| CN101917836B (en) * | 2010-07-16 | 2014-04-23 | 中国电力科学研究院 | Shielding device applied to high voltage direct current converter valve |
| CN102692581A (en) * | 2012-06-19 | 2012-09-26 | 国电大渡河检修安装有限公司 | Current leakage test method for lightning arrestor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WEST CHINA ELECTRIC POWER CO. Free format text: FORMER OWNER: XI AN ELECTRIC MANUFACTURING CORP. Effective date: 20080905 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080905 Address after: Shaanxi province Xi'an City West High Tang Hing Road No. 7, zip code: 710075 Patentee after: China XD Electronic Corporation Address before: Shaanxi province Xi'an Fengdeng road 29, zip code: 710077 Patentee before: Xi'an Electric Manufacturing Corp. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080924 |