CN105655962A - Novel lightning protection device of overhead distribution line - Google Patents
Novel lightning protection device of overhead distribution line Download PDFInfo
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- CN105655962A CN105655962A CN201410655163.3A CN201410655163A CN105655962A CN 105655962 A CN105655962 A CN 105655962A CN 201410655163 A CN201410655163 A CN 201410655163A CN 105655962 A CN105655962 A CN 105655962A
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Abstract
The invention relates to a novel lightning protection device of an overhead distribution line. The novel lightning protection device comprises an overhead power line, a terminal rod, and a high-voltage lightning protection unit. The terminal rod is installed on the ground above a grounding grid and is especially arranged outside a building and power equipment; and the top of the terminal rod is connected with the overhead power line connected with the high-voltage lightning protection unit. A plurality of lightning protection insulators are arranged inside the high-voltage lightning protection unit, wherein the number of the lightning protection insulators can be 1 or 3, or at least 3. The lightning protection insulators are connected in parallel inside the high-voltage lightning protection unit. According to the invention, the provided novel lightning protection device has the following beneficial effects: with the line post type variable-proportion clamping lightning protection insulators, a special grounding leading-down wire can be used well, power sending is not affected by any fault of the insulators, inspection tour can be realized well with fault indication, the provided insulator has the identical dimension and structure characteristics with those of the existing insulator, the lightning currents can pass successfully, the power follow currents can be blocked, and the operation reliability is high.
Description
Technical field
The present invention relates to overhead distribution shocking preventing technology, particularly relate to a kind of novel lightning protection device of overhead distribution.
Background technology
Often there is the problem of lightning-caused breaking accident for overhead distribution, thus carry out precautionary measures discussion, in the hope of improving distribution network safety operation level. At present, on overhead distribution, apply now insulation wire all widely, but insulation wire is in application process, some new problems has also occurred; Wherein, problem the most outstanding, when being be struck by lightning, it is easy to broken string accident occurs; According to the statistics of relevant information, Economic Development Zone, Nanchang is in 2008 to 2009 years 2 years, in the power supply area of 30 square kilometres, lightning-caused breaking accident and lightning stroke trip accident are about 35 times, directly loss electricity is about 300,000 kilowatt-hours, seriously reduce power supply reliability, bring bad effect to society, this in 2 years lightning-caused breaking casualty ratio of accidents account for 76.2%. Some statistical information show above: lightning-caused breaking accident, are serious problems the most outstanding in application insulation wire, and this causes our extensive attention, and actively develop equity experimental study work, and find many effective precautionary measures.
The major cause of lightning-caused breaking accident is occurred to be: 1. electric network thunder and lightning superpotential flashover, that is normal atmosphere or higher than heavy-current discharge in normal atmosphere is arc-over form; 2. during thunder and lightning superpotential flashover, moment flame current very big but the time is very short; 3. when thunder and lightning superpotential flashover, particularly between two-phase or three-phase flashover and form metallicity short-channel, cause kilo-ampere power frequency continued flow, arc energy will increase suddenly.
When thunderbolt insulated overhead line produces huge thunder and lightning superpotential, the most thin spot of electric field will be found along wire when it exceedes the withstand voltage level of wire insulation and the insulation layer of wire is punctured (usually within the scope of 30 centimeters, insulator two ends), form the breakdown point of aperture size, then insulator creeping discharge is formed flashover, last power frequency arc forms metallicity short-channel after developing to the metal of insulator root, and power frequency arc is fixed on the rear fused wire of some burning; When the overhead bare conductor that is struck by lightning produces huge thunder and lightning superpotential, flashover will be formed along the insulator creeping discharge that the most thin spot of electric field found by wire, last power frequency arc forms metallicity short-channel after developing to the metal of insulator root, causes line tripping accident.
This it is important to note that, conveniently principle, it is necessary to carry out the analysis of several aspects:
The protection principle of lightning protection insulator and protection domain, namely carry out Theoretical Calculation and proof test, it is determined that the scale parameter of voltage clamp;Thunder and lightning is along insulation wire and the active path of lightning protection insulator and punctures rule, and lightning protection insulator is used for the difference of naked cable with insulation wire; Thunder arrester and insulator combination, structure mode, by proof test, confirm that non-linear clamp members is contained in high-tension side and is contained in the difference of ground side; Destruction base according to non-linear clamp members is managed, development novel thermosensitive sense fulminant element, the action when non-linear clamp members damages, and have significantly to indicate, can convenient looking up the fault point; The thermal expansivity of research differing materials, and make it under harsh natural condition, the coefficient of expansion obtains mutually benefit and tastes; The optimal seal structure of research lightning protection insulator and sealing means; The difference of mode Bu Tong fixed by research insulation wire and naked cable on lightning protection insulator; The rule of artificial manufacture thin spot and thunder and lightning nature breakdown point on insulation wire; The impact in lightning protection insulator different installation lightening activity path; Different earthing mode, under different grounding resistance, the overvoltage protecting energy affecting laws of lightning protection insulator.
Lightning protection insulator is the distribution line lightning protection device of a kind of novel concept, and thunder arrester and insulator are combined into one by it, has complied with the megatrend of international distribution line lightning protection completely. We are in conjunction with the problems referred to above for this reason, can be widely used in power system suspended insulated guide wire and the naked cable line thunder protection of 35kV and following voltage range, it is possible to for the protection of substation transformer. Therefore, for above aspect, it is necessary to prior art is effectively innovated.
Summary of the invention
For above defect, the present invention provides a kind of can not affect power transmission because of faults itself, have fault indication be convenient to make an inspection tour and existing insulator sizes and structural performance completely identical, can allow lightning current by, block power frequency continued flow, the novel lightning protection device of overhead distribution that serviceability is high, to solve many deficiencies of prior art.
For achieving the above object, the present invention is by the following technical solutions:
A kind of novel lightning protection device of overhead distribution, comprise overhead power transmission line, end pole, high pressure lightning protection device, end pole is arranged on the ground above ground net and this end pole is arranged at buildings and power equipment is outside, and described end pole top connects overhead power transmission line and connects high pressure lightning protection device on this overhead power transmission line;
This high pressure lightning protection device is inner with some lightning protection insulators, and this lightning protection insulator quantity is 1,3 or at least 3; This lightning protection insulator is inner at high pressure lightning protection device is parallel way connection.
Steel tower is set up in described buildings and power equipment periphery thereof, and described steel tower top is installed and connect sudden strain of a muscle device, with antenna on steel tower.
Described lightning protection insulator is line pole type variable ratio clamper type, and Zinc-Oxide Arrester installed by the ground electric wire bottom end pole.
The useful effect of overhead distribution of the present invention novel lightning protection device is:
(1) by setting up a kind of line pole type variable ratio clamper lightning protection insulator, be conducive to Special grounding downlead, power transmission can not be affected because of faults itself, have fault indication be convenient to make an inspection tour and existing insulator sizes and structural performance completely identical, can allow lightning current by, block power frequency continued flow, serviceability height;
(2) four major problem that damage to crops caused by thunder brings can be eliminated, accomplish thunderbolt do not trip, insulate do not puncture, circuit not burning, wire do not break, it is ensured that safe and reliable power supply is that distribution line power supply intelligent, uninterrupted provides safety assurance;
(3) reduce year prerun, it is convenient to find trouble spot, reduces looking up the fault and power off time;
(4) by expanding, again configure, can hot line work, remove and lightning protection insulator is installed, the distribution line lightning protection device of existing addition type, and on insulator limit, because having potential difference with insulator, mostly can band Denso and can not charged tear open, lightning protection insulator is integrated because of structure design, it does not have potential difference, can charged dismount, reduce power off time, increase electricity sales amount, adapt to the trend of hot line work;
(5) lightning protection insulator is because of oneself's clamper, and oneself's protection, does not need Special grounding downlead, and compared with existing lightning protection pattern, insulator add lightning protection device, grounding device is compared, install simple, fast, reliability height, total expenses declines the last 1/2.
Accompanying drawing explanation
With reference to the accompanying drawings the present invention is described in further detail below.
Fig. 1 is the structural representation of the novel lightning protection device of overhead distribution described in the embodiment of the present invention;
Fig. 2 is the partial circuit schematic diagram of the novel lightning protection device of overhead distribution described in the embodiment of the present invention.
In figure:
1, overhead power transmission line; 2, end pole; 3, lightning protection insulator; 4, high pressure lightning protection device; 5, Zinc-Oxide Arrester; 6, buildings and power equipment thereof; 7, steel tower; 8, antenna; 9, ground net; 10, sudden strain of a muscle device is connect.
Embodiment
As shown in Figure 1-2, the novel lightning protection device of overhead distribution described in the embodiment of the present invention, comprise overhead power transmission line 1, end pole 2, high pressure lightning protection device 4, described end pole 2 is arranged on the ground above ground net 9 and this end pole 2 is arranged at buildings and power equipment 6 is outside, meanwhile, steel tower 7 is set up at buildings and power equipment 6 periphery thereof;
Correspondingly, described end pole 2 top connects overhead power transmission line 1 and connects high pressure lightning protection device 4 on this overhead power transmission line 1, it is important to note that, this high pressure lightning protection device 4 inside is with some lightning protection insulators 3, for line pole type variable ratio clamper type and its quantity can be 1,3 or at least 3 to this lightning protection insulator 3, and this lightning protection insulator 3 is inner at high pressure lightning protection device 4 is parallel way connection; Lightning protection insulator 3 is because of oneself's clamper, and oneself's protection, does not need Special grounding downlead, and compared with existing lightning protection pattern, insulator add lightning protection device, grounding device is compared, install simple, fast, reliability height, total expenses declines the last 1/2.
Correspondingly, Zinc-Oxide Arrester 5 being installed by the ground electric wire bottom described end pole 2, described steel tower 7 top is installed to connect and is dodged device 10, with antenna 8 on steel tower 7.
The above-mentioned description to embodiment can understand and apply this case technology for the ease of those skilled in the art; these examples obviously can be made various amendment by person skilled in the art easily; therefore; this case is not limited to above embodiment; the technician of this area is according to the announcement of this case, and improvement and the amendment made for this case all should in the protection domains of this case.
Claims (4)
1. the novel lightning protection device of overhead distribution, comprise overhead power transmission line (1), end pole (2), high pressure lightning protection device (4), end pole (2) is arranged on the ground of ground net (9) top and this end pole (2) is arranged at buildings and power equipment (6) is outside, it is characterised in that:
Described end pole (2) top connects overhead power transmission line (1) and this overhead power transmission line (1) upper connection high pressure lightning protection device (4);
This high pressure lightning protection device (4) is inner with some lightning protection insulators (3), and this lightning protection insulator (3) quantity is 1,3 or at least 3;
This lightning protection insulator (3) is inner at high pressure lightning protection device (4) is parallel way connection.
2. the novel lightning protection device of overhead distribution according to claim 1, it is characterized in that: steel tower (7) is set up in described buildings and power equipment (6) periphery thereof, described steel tower (7) top is installed to connect and is dodged device (10), with antenna (8) on steel tower (7).
3. the novel lightning protection device of overhead distribution according to claim 1, it is characterised in that: described lightning protection insulator (3) is line pole type variable ratio clamper type.
4. the novel lightning protection device of overhead distribution according to claim 1, it is characterised in that: Zinc-Oxide Arrester (5) installed by the ground electric wire of described end pole (2) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410655163.3A CN105655962A (en) | 2014-11-18 | 2014-11-18 | Novel lightning protection device of overhead distribution line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410655163.3A CN105655962A (en) | 2014-11-18 | 2014-11-18 | Novel lightning protection device of overhead distribution line |
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| CN105655962A true CN105655962A (en) | 2016-06-08 |
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| CN201410655163.3A Pending CN105655962A (en) | 2014-11-18 | 2014-11-18 | Novel lightning protection device of overhead distribution line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711684A (en) * | 2018-05-18 | 2018-10-26 | 云南电网有限责任公司电力科学研究院 | A kind of electric force pole tower shared system |
| CN111144010A (en) * | 2019-12-27 | 2020-05-12 | 广东电网有限责任公司电力科学研究院 | Lightning equipment configuration simulation model modeling method and device |
| CN111525436A (en) * | 2020-03-16 | 2020-08-11 | 大唐水电科学技术研究院有限公司 | Lightning invasion wave prevention and control method for 500kV booster station of power plant |
-
2014
- 2014-11-18 CN CN201410655163.3A patent/CN105655962A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711684A (en) * | 2018-05-18 | 2018-10-26 | 云南电网有限责任公司电力科学研究院 | A kind of electric force pole tower shared system |
| CN108711684B (en) * | 2018-05-18 | 2020-02-28 | 云南电网有限责任公司电力科学研究院 | Electric power tower sharing system |
| CN111144010A (en) * | 2019-12-27 | 2020-05-12 | 广东电网有限责任公司电力科学研究院 | Lightning equipment configuration simulation model modeling method and device |
| CN111525436A (en) * | 2020-03-16 | 2020-08-11 | 大唐水电科学技术研究院有限公司 | Lightning invasion wave prevention and control method for 500kV booster station of power plant |
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Application publication date: 20160608 |