CN101174011A - Earthing mode of optical fiber compound overhead ground wire and earthing pilot arc clearance - Google Patents
Earthing mode of optical fiber compound overhead ground wire and earthing pilot arc clearance Download PDFInfo
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- CN101174011A CN101174011A CNA2007101685754A CN200710168575A CN101174011A CN 101174011 A CN101174011 A CN 101174011A CN A2007101685754 A CNA2007101685754 A CN A2007101685754A CN 200710168575 A CN200710168575 A CN 200710168575A CN 101174011 A CN101174011 A CN 101174011A
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Abstract
The invention relates to a grounding method and grounded arc gap of Optical fiber composite overhead ground wire (OPGW), which is characterized in that: a grounded arc gap is arranged between OPGW and each pole tower; while in normal operation, OPGW is insulated from the whole line, and when a transient high voltage arises on the OPGW due to lightening strike or failures of the line, the OPGW can be electrically switched into conduction and grounded. Each grounded arc gap comprises a composite insulating bar, and a plurality of electrodes arranged at both ends of a plurality of hardware fittings; wherein, the gap between the electrodes can be adjusted according to voltage level of the power transmission line. The discharging guided by the electrodes at both ends of the hardware fittings are conducted between the arc gaps, the arc root of the electric arc is restricted at the ends of the electrodes, so as to prevent the high temperature at the arc root from burning out a single wire of the OPGW. The invention has the advantages of preventing reflows among the ground wire, pole towers and the earth during normal operations, greatly reducing the electric energy loss on transmission lines, lessening the probability of lightening strikes on the OPGW, and guarding against strand breakage of the OPGW due to electric arcs and communication interruption.
Description
Technical field
The invention belongs to the ultra-high-tension power transmission line field, relate to a kind of Optical Fiber composite overhead Ground Wire earthing mode and ground connection and lead the arc gap, Optical Fiber composite overhead Ground Wire is called for short OPGW, and persons skilled in the art are all known, and below will replace Optical Fiber composite overhead Ground Wire with OPGW.
Background technology
In the high voltage circuit engineering, all adopt OPGW to pursue basic earthing mode at present both at home and abroad, for example introduced correlation technique in " study on prevention that the Optical Fiber composite overhead Ground Wire thunderbolt the is disconnected strand " literary composition on the 12nd phase of " High-Voltage Technology " Dec in 2005, the specific design mode sees that China Electric Power Publishing House publishes Zhang Diansheng chief editor " power engineering high voltage circuit design manual ", but this earthing mode easily causes bigger circulation consume, it is calculated that the ground wire loss of 220kV circuit is about (5～10) * 10
4Kilowatt-hour/hundred kilometers years, the loss of 500kV circuit ground wire is about 500 * 10
4Kilowatt-hour/hundred kilometers years.Because electric pressure is high more, the electric energy loss that causes is also big more, and for AC extra high voltage 1000kV circuit of building and Northwest Grid 750kV circuit, the electric energy loss that OPGW causes by basic ground connection will be bigger.In addition, be easier to be struck by lightning,, make the lightning induction electric charge that pursues on the OPGW of basic ground connection more, be easier to guide thunder discharge guiding OPGW development earlier because another root ground wire is a graded insulation one point earth mode by basic earthing mode.
Because OPGW has the communication channel function concurrently, can not adopt the graded insulation mode as common ground wire.And if adopt all insulation mode, though solved the circulation energy consumption issues, but when be struck by lightning OPGW or line fault cause occurring the transient state high voltage on the OPGW, just may form electrical discharge arc between OPGW and earthing member, electric arc arc root may cause disconnected strand of OPGW and communicating interrupt.In addition sometimes in normal working conditions, if electrostatic induction voltage height when the clearance between OPGW and the earthing member is less than normal, also can form intermittent discharge spark, long disconnected strand of the OPGW that also can cause of time one.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art,, provide a kind of Optical Fiber composite overhead Ground Wire earthing mode and ground connection to lead the arc gap for reducing problems such as circulation consume, thunderbolt and disconnected thigh.
Technical scheme of the present invention is, a kind of Optical Fiber composite overhead Ground Wire earthing mode, it is characterized in that: a ground connection is installed between OPGW and the every basic shaft tower of circuit leads arc gap 1, the guiding discharge occurs in to be led in the arc gap, the arc root is limited in electrode tip, OPGW leads the arc gap to the insulation of all fronts road by ground connection during operate as normal, and when be struck by lightning OPGW or line fault caused occurring the transient state high voltage on the OPGW, OPGW then led arc gap electrically conducting ground connection by ground connection.
Aforesaid Optical Fiber composite overhead Ground Wire earthing mode, it is characterized in that: ground connection is led the arc clearance distance and is determined according to the electric pressure of installation circuit, the electric pressure of transmission line of electricity is high more, electromagnetic induction voltage on the OPGW of insulation against ground is high more, and the sparking voltage of leading the arc gap is by the test calibration.
The ground connection of adopting in the above-mentioned OPGW earthing mode is led the arc gap, it is characterized in that: form by composite insulation bar 2, scalable top electrode 3, bottom electrode 4, upper end gold utensil 5, lower end gold utensil 6 and maintenance nut 7, composite insulation bar 2 is led the arc gap with the two end electrodes 3 and 4 formations that are installed on two ends gold utensil 5 and 6, scalable top electrode 3 links to each other with upper end gold utensil 5 by maintenance nut 7, and bottom electrode 4 is fixed on the lower end gold utensil 6.
Above-mentioned ground connection is led the arc gap, it is characterized in that: described electrode 3 and 4 clearance distance can be adjusted between 2cm～15cm.
Above-mentioned ground connection is led the arc gap, it is characterized in that: described electrode 3 and 4 material are made by steel part, and end shape can be point, round bar, ball.
Effect: adopt the present invention, OPGW is the insulation erection mode, between OPGW and shaft tower, install one and lead the arc gap, the guiding discharge occurs in to be led in the arc gap, the arc root is limited in electrode tip, form between ground wire, shaft tower and the earth in the time of can preventing operate as normal and reflux, significantly reduce the electric energy loss of transmission line of electricity; And can reduce the thunderstruck probability of OPGW, prevent that electric arc from causing disconnected strand of OPGW and communicating interrupt.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing.
Fig. 1 is an earthing mode schematic diagram of the present invention.
Fig. 2 is the structural drawing that ground connection of the present invention is led the arc gap.
Among the figure, 1 ground connection is led arc gap, 2 composite insulation bars, 3 scalable top electrodes, 4 bottom electrodes, 5 upper end gold utensils, 6 lower end gold utensils, 7 maintenance nuts, 8 shaft towers, 9 fastening clips, 10 preformed armor rods suspension clamps
Embodiment
Fig. 1 is an earthing mode schematic diagram of the present invention, change when present OPGW is operate as normal by basic earthing mode and insulate completely, one ground connection is installed between OPGW and the every basic shaft tower of circuit leads arc gap 1, OPGW leads the 1 pair of road insulation completely in arc gap by ground connection during operate as normal, the gap can guarantee not because of electromagnetic induction generation spark discharge, when be struck by lightning OPGW or line fault cause occurring the transient state high voltage on the OPGW, can guarantee the gap electrically conducting, OPGW then leads arc gap 1 electrically conducting ground connection by ground connection.Ground connection is led arc gap 1 and is installed between the fastening clips 9 and OPGW preformed armor rods suspension clamp 10 on the shaft tower 8 among the figure, leading the arc gap is made up of composite insulation bar and the electrode that is installed on the gold utensil of two ends, one termination electrode tightens anchor clamps 9 with shaft tower and links to each other, other end electrode links to each other with OPGW preformed armor rods suspension clamp 10, and the two end electrodes distance can be according to the electric pressure adjustment of transmission line of electricity.The arc electrode of leading that is installed on the OPGW is made by resistant to elevated temperatures steel part, and armful as a whole contact resistance that makes of embedding formula gold utensil of leading arc electrode and OPGW is very little.The two end electrodes guiding is discharged and is led now in the arc gap, and electric arc arc root is limited in electrode tip, prevents the high temperature fusing OPGW monofilament of arc root.
Fig. 2 is the structural drawing that ground connection of the present invention is led arc gap 1, ground connection is led the arc gap and is made up of composite insulation bar 2, scalable top electrode 3, bottom electrode 4, upper end gold utensil 5, lower end gold utensil 6 and maintenance nut 7, composite insulation bar 2 is led the arc gap with the two end electrodes 3 and 4 formations that are installed on two ends gold utensil 5 and 6, scalable top electrode 5 links to each other with upper end gold utensil 5 by maintenance nut 6, and bottom electrode 4 is fixed on the lower end gold utensil 6.Ground connection is led the electrode 3 in arc gap 1 and 4 clearance distance is determined according to the electric pressure of installation circuit, can between 2cm～15cm, adjust, in general, the electric pressure of transmission line of electricity is high more, and the electromagnetic induction voltage on the OPGW of insulation against ground is high more, and for example the induced voltage of certain bar 500kV single back line is 34kV, clearance distance is decided to be 4cm, the induced voltage of certain bar 500kV double-circuit line is 47kV, and clearance distance is decided to be 5cm, and the sparking voltage of leading the arc gap can be by the test calibration; Electrode 3 and 4 end shapes can be point, round bar, ball, this structure has striking and elongates arcing, its material is made by steel part, has the characteristics of anti-arc burning, bootable electric arc occurs between the gap, avoids electric arc arc root to cause disconnected strand of OPGW calcination.
Claims (6)
1. Optical Fiber composite overhead Ground Wire earthing mode, it is characterized in that: a ground connection is installed between OPGW and the every basic shaft tower of circuit leads arc gap (1), the guiding discharge occurs in to be led in the arc gap, the arc root is limited in electrode tip, OPGW leads the arc gap by ground connection and is insulated in all fronts road during operate as normal, when be struck by lightning OPGW or line fault caused occurring the transient state high voltage on the OPGW, OPGW then led arc gap electrically conducting ground connection by ground connection.
2. Optical Fiber composite overhead Ground Wire earthing mode as claimed in claim 1 is characterized in that:, it is characterized in that: ground connection is led the arc clearance distance and is determined that according to the electric pressure of installation circuit sparking voltage is by the test calibration.
3. the ground connection of adopting in the above-mentioned Optical Fiber composite overhead Ground Wire earthing mode is led the arc gap, it is characterized in that: by composite insulation bar (2), scalable top electrode (3), bottom electrode (4), upper end gold utensil (5), lower end gold utensil (6) and maintenance nut (7) are formed, composite insulation bar (2) be installed in the upper end gold utensil (5) at two ends and the both scalable top electrode of two end electrodes (3) on the lower end gold utensil (6) and bottom electrode (4) and constitute and lead the arc gap, scalable top electrode (3) links to each other with upper end gold utensil (5) by maintenance nut (7), and bottom electrode (4) is fixed on the lower end gold utensil (6).
4. ground connection as claimed in claim 3 is led the arc gap, it is characterized in that: the clearance distance of described scalable top electrode (3) and bottom electrode (4) can be adjusted between 2cm～15cm.
5. ground connection as claimed in claim 3 is led the arc gap, it is characterized in that: the material of described top electrode (3) and bottom electrode (4) is made by steel part, its end shape can be the point or round bar or ball.
6. ground connection as claimed in claim 4 is led the arc gap, it is characterized in that: the material of described top electrode (3) and bottom electrode (4) is made by steel part, its end shape can be the point or round bar or ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101685754A CN100483170C (en) | 2007-12-03 | 2007-12-03 | Earthing mode of optical fiber compound overhead ground wire and earthing pilot arc clearance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101685754A CN100483170C (en) | 2007-12-03 | 2007-12-03 | Earthing mode of optical fiber compound overhead ground wire and earthing pilot arc clearance |
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| CN101174011A true CN101174011A (en) | 2008-05-07 |
| CN100483170C CN100483170C (en) | 2009-04-29 |
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| CNB2007101685754A Active CN100483170C (en) | 2007-12-03 | 2007-12-03 | Earthing mode of optical fiber compound overhead ground wire and earthing pilot arc clearance |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129105A (en) * | 2011-03-24 | 2011-07-20 | 中国电力科学研究院 | Sectional-insulation single-point grounding operating method for OPGW optical cable |
| CN104655987A (en) * | 2015-02-28 | 2015-05-27 | 武汉大学 | Novel power transmission line lightning stroke point locating method based on OPGW (optical fiber composite overhead ground wire) light polarization state |
| CN105939009A (en) * | 2016-06-27 | 2016-09-14 | 武汉新能量科技发展有限公司 | OPGW terminal voltage-limiting device for high voltage transformer substation |
| CN108963949A (en) * | 2018-09-03 | 2018-12-07 | 合肥海畅电气技术有限公司 | A kind of large capacity pressure limiting device with heat resistance |
| CN113708328A (en) * | 2021-08-24 | 2021-11-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Protection structure for photoelectric separator |
| CN117292884A (en) * | 2023-10-09 | 2023-12-26 | 国网山东省电力公司济南供电公司 | Energy-saving insulation protection device for overhead ground wire of high-voltage transmission line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2341011B (en) * | 1998-08-27 | 2003-01-22 | Cbs Products Ltd | Apparatuses and methods for stringing cables |
-
2007
- 2007-12-03 CN CNB2007101685754A patent/CN100483170C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129105A (en) * | 2011-03-24 | 2011-07-20 | 中国电力科学研究院 | Sectional-insulation single-point grounding operating method for OPGW optical cable |
| CN102129105B (en) * | 2011-03-24 | 2013-12-18 | 中国电力科学研究院 | Sectional-insulation single-point grounding operating method for OPGW optical cable |
| CN104655987A (en) * | 2015-02-28 | 2015-05-27 | 武汉大学 | Novel power transmission line lightning stroke point locating method based on OPGW (optical fiber composite overhead ground wire) light polarization state |
| CN104655987B (en) * | 2015-02-28 | 2017-08-11 | 武汉大学 | A kind of transmission line lightning stroke point location new method based on OPGW polarization states |
| CN105939009A (en) * | 2016-06-27 | 2016-09-14 | 武汉新能量科技发展有限公司 | OPGW terminal voltage-limiting device for high voltage transformer substation |
| CN108963949A (en) * | 2018-09-03 | 2018-12-07 | 合肥海畅电气技术有限公司 | A kind of large capacity pressure limiting device with heat resistance |
| CN113708328A (en) * | 2021-08-24 | 2021-11-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Protection structure for photoelectric separator |
| CN117292884A (en) * | 2023-10-09 | 2023-12-26 | 国网山东省电力公司济南供电公司 | Energy-saving insulation protection device for overhead ground wire of high-voltage transmission line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100483170C (en) | 2009-04-29 |
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Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE Free format text: FORMER OWNER: WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID Effective date: 20091120 |
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Effective date of registration: 20091120 Address after: Nanjing City, Jiangsu Province South Shui Road No. 8 Patentee after: State Grid Electric Power Research Insititute Address before: Hubei province Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Guowang Wuhan High Voltage Inst |