CN202977037U - Pure-air series-clearance-type alternating current extra-high voltage circuit lightning arrester - Google Patents

Pure-air series-clearance-type alternating current extra-high voltage circuit lightning arrester Download PDF

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Publication number
CN202977037U
CN202977037U CN 201220515868 CN201220515868U CN202977037U CN 202977037 U CN202977037 U CN 202977037U CN 201220515868 CN201220515868 CN 201220515868 CN 201220515868 U CN201220515868 U CN 201220515868U CN 202977037 U CN202977037 U CN 202977037U
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CN
China
Prior art keywords
lightning arrester
less
transmission line
series gap
pure air
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Expired - Lifetime
Application number
CN 201220515868
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Chinese (zh)
Inventor
苏宁
张搏宇
张翠霞
吕雪斌
焦飞
殷禹
沈海滨
王保山
宋继军
张晓星
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
PG Toshiba Langfang Arrester Co Ltd
Original Assignee
State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
PG Toshiba Langfang Arrester Co Ltd
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Application filed by State Grid Corp of China SGCC, China Electric Power Research Institute Co Ltd CEPRI, PG Toshiba Langfang Arrester Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN 201220515868 priority Critical patent/CN202977037U/en
Application granted granted Critical
Publication of CN202977037U publication Critical patent/CN202977037U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model provides a pure-air series-clearance-type alternating current extra-high voltage circuit lightning arrester. The lightning arrester comprises a lightning arrester body and a series clearance group, wherein the series clearance group comprises clearances which are orderly connected in series; the series clearance group is connected with a high-voltage end of the lightning arrester body; the height of the lightning arrester body is 4-6m; and the distance between the clearances is 2.0-2.4m. The pure-air series-clearance-type alternating current extra-high voltage circuit lightning arrester provided by the utility model is simple in structure, small in volume, convenient to install, large in clearance adjusting range, and reasonable in technical parameter, and has a good application prospect.

Description

A kind of pure air series gap type UHVAC transmission line lightning arrester
Technical field
The utility model relates to lightning arrester, is specifically related to a kind of pure air series gap type UHVAC transmission line lightning arrester.
Background technology
Usually adopt on engineering and reduce earth resistance, set up installation of dual lightning wires, reduce the method such as earth-wire protection angle and limit lightning overvoltage, reduce tripping rate with lightning strike.Yet, strong at lightening activity, as to reduce earth resistance difficulty mountain area line segment, above-mentioned means can not fundamentally solve the lightning stroke trip problem.
Application number is that 201020537907.9 utility model patent discloses a kind of ultrahigh-voltage alternating-current lightning arrestor, comprise the unit of an arrester that more piece is connected mutually, and be separately positioned on the pressure-equalizing device on this unit of an arrester top and the insulator foot of bottom, establish the resistor disc of connection parallel with one another in unit of an arrester, and be connected in upper and lower side by insulating bar and cover, and be sealed in insulator, lightning arrester Potential distribution is vertically controlled by the outside pressure-equalizing device of unit of an arrester upper end connection.
Have at present 500kV and the following leakage conductor of actual motion both at home and abroad, lightning arrester body generally greater than the length of insulator in parallel with it, needs the special gold utensil of design to solve the installing space mismatch problem with the clearance distance sum, and installation difficulty is large.Due to the raising of electric pressure, extra high voltage line lightning arrester body height and weight all inevitably are greater than 500kV and following leakage conductor, and installation difficulty can be larger; At present not about the test data of extra high voltage line lightning arrester air gap and insulation coordination aspect, test and design difficulty are large.
This just needs to propose the theory that miniaturization is used in the extra high voltage line lightning arrester, designs the extra high voltage line lightning arrester of miniaturization, reduces installation difficulty; Need to determine body dimension and the clearance distance of extra high voltage line lightning arrester.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of pure air series gap type UHVAC transmission line lightning arrester, and simple in structure, volume is little, and is easy for installation; Its gap adjusting range is large; Technical parameter is reasonable, has a good application prospect.
To achieve these goals, the utility model is taked following scheme:
A kind of pure air series gap type UHVAC transmission line lightning arrester, described lightning arrester comprises lightning arrester body and series gap group, and described series gap group comprises the gap of series connection successively, and described series gap group is connected with the high-pressure side of lightning arrester body; The height of described lightning arrester body is 4~6m, and the distance between described gap is 2.0~2.4m.
The height of described lightning arrester body is 4.6m.
The creepage distance of described lightning arrester body is not less than 10200mm.
The overcoat dry arcing distance of described lightning arrester body is not less than 4.6m; so that described lightning arrester body can tolerate the lightning impulse voltage that is not less than 1.25 times of its actual level of protection, and can tolerate the power-frequency voltage 1min that is not less than 635kV under the condition of drenching with rain of regulation.
The resistor disc diameter of described lightning arrester body is 75~100mm, so that the long duration impulse current test that resistor disc can be by being not less than 1500A and be the 4/10 μ s heavy current impact resistance test of 100kA by amplitude continuous 3 times.
The rated voltage of described lightning arrester is that under 768kVrms direct current 2mA, reference voltage is not less than 1086kV, nominal discharge current 30kA, and under the 30kA lightning impulse current, residual voltage is not more than 2150kV, and under the 30kA steep impulse current, residual voltage is not more than 2365kV.
Distance between described gap is 2.1~2.3m.
Described gap comprises two electrodes, and one of them is connected with the high-pressure side of described lightning arrester body, and its metal tube or Metallic rod diameter are not less than 80mm, and another electrode is arranged on transmission line wire, and its metal tube or Metallic rod diameter are not less than 200mm.
Described lightning arrester standard lightning impulse 50% discharge voltage is not more than 2900kV; The switching impulse withstand voltage is not less than 1600kV; Can tolerate the power-frequency voltage 1min that is not less than 700kV when described lightning arrester body breaks down under the condition of drenching with rain of regulation, it does not occur can tolerating the power-frequency voltage 1min that is not less than 889kV when abnormal under the condition of drenching with rain of regulation.
Compared with prior art, the beneficial effects of the utility model are: the pure air series gap type UHVAC transmission line lightning arrester that the utility model provides is simple in structure, and volume is little, and is easy for installation; Its gap adjusting range is large; Technical parameter is reasonable, has a good application prospect.
Description of drawings
Fig. 1 is pure air series gap type UHVAC transmission line test of lightning arrester and scheme of installation;
Fig. 2 is the lightning arrester body schematic diagram of UHVAC transmission line lightning arrester;
Fig. 3 is that discharge voltage and the clearance distance of UHVAC transmission line lightning arrester concerns schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Fig. 1-Fig. 3, a kind of pure air series gap type UHVAC transmission line lightning arrester, described lightning arrester comprises lightning arrester body and series gap group, described lightning arrester body comprises the unit of an arrester of overcoat, resistor disc and serial connection, described series gap group comprises the gap of series connection successively, and described series gap group is connected with the high-pressure side of lightning arrester body; The height of described lightning arrester body is 4~6m, take the height of 4.6m as optimum.
Distance between described gap is 2.0~2.4m, take the distance of 2.1~2.3m as excellent.
The creepage distance of described lightning arrester body is not less than 10200mm.
The dry arcing distance of described overcoat is not less than 4.6m, so that described lightning arrester body can tolerate the lightning impulse voltage that is not less than 1.25 times of its actual level of protection, and can tolerate the power-frequency voltage 1min that is not less than 635kV under the condition of drenching with rain of regulation.Described lightning arrester body can pass through effective value 60kA, and the duration is not less than the short circuit test of 0.1s.
The diameter of described resistor disc is 75~100mm, so that the long duration impulse current test that resistor disc can be by being not less than 1500A and be the 4/10 μ s heavy current impact resistance test of 100kA by amplitude continuous 3 times.
The rated voltage of described lightning arrester is that under 768kVrms direct current 2mA, reference voltage is not less than 1086kV, nominal discharge current 30kA, and under the 30kA lightning impulse current, residual voltage is not more than 2150kV, and under the 30kA steep impulse current, residual voltage is not more than 2365kV.
Described gap comprises two electrodes, and one of them is connected with the high-pressure side of described lightning arrester body, and its metal tube or Metallic rod diameter are not less than 80mm, and another electrode is arranged on transmission line wire, and its metal tube or Metallic rod diameter are not less than 200mm.
Described lightning arrester standard lightning impulse 50% discharge voltage is not more than 2900kV; The switching impulse withstand voltage is not less than 1600kV; Can tolerate the power-frequency voltage 1min that is not less than 700kV when described lightning arrester body breaks down under the condition of drenching with rain of regulation, it does not occur can tolerating the power-frequency voltage 1min that is not less than 889kV when abnormal under the condition of drenching with rain of regulation.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment, the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.

Claims (9)

1. pure air series gap type UHVAC transmission line lightning arrester, it is characterized in that: described lightning arrester comprises lightning arrester body and series gap group, described series gap group comprises the gap of series connection successively, and described series gap group is connected with the high-pressure side of lightning arrester body; The height of described lightning arrester body is 4~6m, and the distance between described gap is 2.0~2.4m.
2. pure air series gap type UHVAC transmission line lightning arrester according to claim 1, it is characterized in that: the height of described lightning arrester body is 4.6m.
3. pure air series gap type UHVAC transmission line lightning arrester according to claim 2, it is characterized in that: the creepage distance of described lightning arrester body is not less than 10200mm.
4. pure air series gap type UHVAC transmission line lightning arrester according to claim 3; it is characterized in that: the overcoat dry arcing distance of described lightning arrester body is not less than 4.6m; so that described lightning arrester body can tolerate the lightning impulse voltage that is not less than 1.25 times of its actual level of protection, and can tolerate the power-frequency voltage 1min that is not less than 635kV under the condition of drenching with rain of regulation.
5. pure air series gap type UHVAC transmission line lightning arrester according to claim 1, it is characterized in that: the resistor disc diameter of lightning arrester body is 75~100mm, so that the long duration impulse current test that resistor disc can be by being not less than 1500A and be the 4/10 μ s heavy current impact resistance test of 100kA by amplitude continuous 3 times.
6. pure air series gap type UHVAC transmission line lightning arrester according to claim 1, it is characterized in that: the rated voltage of described lightning arrester is that under 768kVrms direct current 2mA, reference voltage is not less than 1086kV, nominal discharge current 30kA, under the 30kA lightning impulse current, residual voltage is not more than 2150kV, and under the 30kA steep impulse current, residual voltage is not more than 2365kV.
7. pure air series gap type UHVAC transmission line lightning arrester according to claim 1, it is characterized in that: the distance between described gap is 2.1~2.3m.
8. pure air series gap type UHVAC transmission line lightning arrester according to claim 7, it is characterized in that: described gap comprises two electrodes, one of them is connected with the high-pressure side of described lightning arrester body, its metal tube or Metallic rod diameter are not less than 80mm, another electrode is arranged on transmission line wire, and its metal tube or Metallic rod diameter are not less than 200mm.
9. pure air series gap type UHVAC transmission line lightning arrester according to claim 1, it is characterized in that: described lightning arrester standard lightning impulse 50% discharge voltage is not more than 2900kV; The switching impulse withstand voltage is not less than 1600kV; Can tolerate the power-frequency voltage 1min that is not less than 700kV when described lightning arrester body breaks down under the condition of drenching with rain of regulation, it does not occur can tolerating the power-frequency voltage 1min that is not less than 889kV when abnormal under the condition of drenching with rain of regulation.
CN 201220515868 2012-10-09 2012-10-09 Pure-air series-clearance-type alternating current extra-high voltage circuit lightning arrester Expired - Lifetime CN202977037U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN202977037U true CN202977037U (en) 2013-06-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102930943A (en) * 2012-10-09 2013-02-13 中国电力科学研究院 Pure-air serial gap type extra-high voltage line lightening arrester
CN104599798A (en) * 2014-12-12 2015-05-06 国家电网公司 Direct current lightning arrester and system using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102930943A (en) * 2012-10-09 2013-02-13 中国电力科学研究院 Pure-air serial gap type extra-high voltage line lightening arrester
CN102930943B (en) * 2012-10-09 2016-08-03 中国电力科学研究院 A kind of pure air series gap type UHVAC transmission line spark gap
CN104599798A (en) * 2014-12-12 2015-05-06 国家电网公司 Direct current lightning arrester and system using the same

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Granted publication date: 20130605

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