CN204315320U - Parallel gap lightning protection device - Google Patents

Parallel gap lightning protection device Download PDF

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Publication number
CN204315320U
CN204315320U CN201420741891.1U CN201420741891U CN204315320U CN 204315320 U CN204315320 U CN 204315320U CN 201420741891 U CN201420741891 U CN 201420741891U CN 204315320 U CN204315320 U CN 204315320U
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China
Prior art keywords
electrode
drainage tube
wire
ground side
protection device
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CN201420741891.1U
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Chinese (zh)
Inventor
郭润生
何彩红
王强
赵振生
吴卓娟
云平平
窦志章
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State Grid Corp of China SGCC
Shuozhou Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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State Grid Corp of China SGCC
Shuozhou Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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Abstract

The utility model parallel gap lightning protection device, belongs to the lightning-protection engineering field of distribution line, technical problem to be solved is to provide a kind of parallel gap lightning protection device for distribution line, the lightning-caused breaking problem of effective solution distribution line, more accurately locates lightning stroke flashover, and can monitor the generation of lightning stroke flashover according to glass bushing, structure is simple, easy for installation, the technical scheme adopted is: drainage tube is closely sleeved on wire, the inwall of drainage tube is provided with multiple puncture penetrating insulating barrier, the lateral ends of the side of wire electrode of right angle L shape is ball and vertical end is fixedly connected with drainage tube, on the transverse bar of side of wire electrode, suit is fixed with the glass bushing of a monitoring lightning stroke flashover, one end of ground side electrode is ball and the other end is fixedly connected with insulator bottom, ground side electrode is the meander line structure being provided with a mountain ridge near one end of ball, the electrode tip of side of wire electrode and ground side electrode definitely aligns.

Description

Parallel gap lightning protection device
Technical field
The utility model parallel gap lightning protection device, belongs to the lightning-protection engineering field of distribution line.
Background technology
The research of domestic electrical system damage to crops caused by thunder, mostly for transmission line, transformer station and power plant etc., very lacks the content of system research distribution line lightning protection aspect.In order to solve the impact of the external objects such as branch on distribution wire, improve power supply reliability, 10kV overhead transmission line is changed into insulated conductor distribution line by China's major part city just gradually.Although carried out the insulating transformation of middle pressure rack overhand lines, distribution line has been greatly improved compared to its general level of the health of plain conductor, and also occurred new technical problem, one of them is the problem of insulated conductor breakage caused by lightning stroke simultaneously.Distribution line is once broken string, long power failure will be caused, and charged wire breaks and falls on the ground, likely cause the electric shock accidents of the personnel of passing by, this broken string and pyrophoricity accident seriously affect the safe operation of distribution system, bring very big inconvenience to national economy and people's lives.Therefore, the research of the broken string mechanism and guard technology thereof of carrying out insulated conductor is very necessary.
Relative to voltage levels transmission line; 10kV distribution line does not generally adopt method such as erection lightning conducter, coupling ground wire etc.; and by means of only adopting reinforced insulation, installing the lightning withstand level that " blocking " type lightning-protection methods such as leakage conductor improve power distribution network, and then reduce tripping rate with lightning strike.But these measures all have certain limitation, the generation of distribution line thunderbolt power outage can not be prevented efficiently.And " blocking " type lightning protection has seemed conservative and unilateral, further research economical and practical, novel line thunder protection safeguard measure is necessary.In recent years, parallel connection clearance device, as the lightning protection device of a kind of " diverting type ", has become the strong of traditional circuit lightning protection mode and has supplemented, can solve the difficult problem that distribution line faces in lightning protection.This installation cost is low, and simple installation is easy to spread, and can significantly reduce lightning-caused breaking, the permanent fault such as insulator bursts, reduce the economic loss that power outage brings.
The operation principle of parallel connection gaps is: the pair of metal electrodes in parallel on insulator side, form portable protective gaps, be arranged on the end of insulator, both can be struck by lightning circuit time and system in automatic reclosing with the use of, by timely for lightning current ground connection to user's uninterrupted power supply, thus prevent the effect that insulator surface flashover maintenance circuit normally runs; Can, by coordinating with the blow-out equipment of parallel connection gaps end, before reclosing action, utilize blow-out equipment that electric arc is caused insulator end extinguish fast again, thus can not insulator be burnt out while guarantee line security runs.The parallel gap lightning protection device of existing overhead distribution insulator, have following major defect: 1. this parallel gap lightning protection device is only applicable to the lightning protection of overhead bare conductor, the structure of its device is not adapted at suspended insulated guide wire uses; 2. parallel clearance lightning protection device dredges by drainage needle the disconnection problem that power frequency arc can solve insulated conductor to a certain extent, but when insulated conductor tolerance big current still may because piercing portions to be in contact with it area little and the wire of both sides firmly can not be held thus cause the generation of broken string situation.
Utility model content
The utility model overcomes the deficiency that prior art exists; technical problem to be solved is to provide a kind of parallel gap lightning protection device for distribution line; the lightning-caused breaking problem of effective solution distribution line; more accurately locate lightning stroke flashover; and the generation of lightning stroke flashover can be monitored according to glass bushing; structure is simple, easy for installation.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: parallel gap lightning protection device, comprise drainage tube, side of wire electrode and ground side electrode, drainage tube is closely sleeved on wire, the inwall of drainage tube is provided with multiple puncture penetrating insulating barrier, the lateral ends of the side of wire electrode of right angle L shape is ball and vertical end is fixedly connected with drainage tube, on the transverse bar of described side of wire electrode, suit is fixed with the glass bushing of a monitoring lightning stroke flashover, one end of ground side electrode is ball and the other end is fixedly connected with insulator bottom, ground side electrode is the meander line structure being provided with a mountain ridge near one end of ball, the electrode tip of described side of wire electrode and ground side electrode definitely aligns.
Puncture on the inwall of described drainage tube is highly greater than the thickness of insulating layer of wire.
The short circuit distance of described side of wire electrode and ground side electrode is 22-33 ㎜.
Described insulator bottom is quadrangular, and ground side electrode and insulator bottom are fixed together by two angle steel bolt that is connected.
Described puncture, drainage tube, side of wire electrode and ground side electrode make by the high temperature resistant and carbon steel that intensity is high.
The utility model compared with the existing technology have beneficial effect is: the utility model by side of wire electrode, ground side electrode short circuit insulator a part, can effective location lightning stroke flashover, high potential when flashover is occurred by the puncture of drainage tube by side of wire electrode on wire is drawn, effectively can dredge power frequency arc by the cooperation of side of wire electrode and ground side electrode, avoid insulator to be subject to serious ablation; Glass bushing on side of wire electrode directly can observe from the utility model the generation whether having lightning stroke flashover in appearance, has important directive significance to engineering design and later stage adjustment.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the cross-sectional view of drainage tube in the utility model.
Fig. 3 is the syndeton schematic diagram of ground side electrode and insulator bottom in the utility model.
In figure: 1 is drainage tube, 2 is side of wire electrode, and 3 is ground side electrode, and 4 is wire, and 5 is puncture, and 6 is insulator, and 7 is mountain ridge, and 8 is glass bushing.
Embodiment
As Figure 1-3, the utility model parallel gap lightning protection device, comprise drainage tube 1, side of wire electrode 2 and ground side electrode 3, drainage tube 1 is closely sleeved on wire 4, the inwall of drainage tube 1 is provided with multiple puncture 5 penetrating insulating barrier, the lateral ends of the side of wire electrode 2 of right angle L shape is ball and vertical end is fixedly connected with drainage tube 1, on the transverse bar of described side of wire electrode 2, suit is fixed with the glass bushing 8 of a monitoring lightning stroke flashover, one end of ground side electrode 3 is ball and the other end is fixedly connected with insulator 6 bottom, ground side electrode 3 is the meander line structure being provided with a mountain ridge 7 near one end of ball, the electrode tip of described side of wire electrode 2 and ground side electrode 3 definitely aligns.
Puncture 5 on the inwall of described drainage tube 1 is highly greater than the thickness of insulating layer of wire 4.
The short circuit distance of described side of wire electrode 2 and ground side electrode 3 is 22-33 ㎜.
Described insulator 6 bottom is quadrangular, and ground side electrode 3 and insulator 6 bottom are fixed together by two angle steel bolt that is connected.
Described puncture 5, drainage tube 1, side of wire electrode 2 and ground side electrode 3 make by the high temperature resistant and carbon steel that intensity is high.
Embodiment
Drainage tube 1 is the hollow semi-cylindrical that two horizontal lengths are about 80-100mm, distance insulator axis 230-260mm place on wire 4 is closely fixed on by bolt, puncture 5 on drainage tube 1 inwall is conical metal tip and the puncture of multiple size is spaced, as Figure 2-3, a puncture is greatly established after every three little punctures, large puncture is highly taken as the 20%-30% of insulated conductor overall diameter, that punctures is spaced apart 3-6mm, little puncture contacts secure wires with insulating barrier, large puncture insulation-piercing layer and wire close contact, draw high potential;
Side of wire electrode 2 is right angle L shape, and horizontal length is 180-220mm, and vertical length is that 15-20mm horizontal end is provided with steel ball, and vertical upper end is fixedly connected with drainage tube 1 by nut;
Ground side electrode 3 is for there being the fold-line-shaped structure of mountain ridge, and the vertical height of mountain ridge 7 is 15-25 ㎜, and horizontal length is 420-460mm, has the end, one end of mountain ridge 7 to be provided with steel ball, the other end by fastening nuts in insulator 6 bottom;
Side of wire electrode 2 and ground side electrode 3 need end definitely to align when mounted.
It is below implementation result explanation of the present utility model.
50% lightning impulse test: after the utility model is installed at insulator two ends, the basic fixed position of lightning wave flashover path, in the end of parallel connection gaps, has good linear relationship between clearance distance and discharge voltage value.
Lightning impulse voltage-second characteristic test: object will study the change of lightning impulse wave steepness for the flashover voltage of annular parallel connection gaps and the impact of discharge time; according to the insulation coordination principle of insulator string and annular parallel connection gaps, test known parallel connection gaps from Lightning Characteristic and good protective effect is served to insulator string.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from the utility model aim.Such as, the glass bushing in the utility model also can adopt disposable finish pigment to observe burn situation etc. other can realize any structure whether its monitoring has the function of lightning stroke flashover and power current.

Claims (5)

1. parallel gap lightning protection device, it is characterized in that: comprise drainage tube (1), side of wire electrode (2) and ground side electrode (3), drainage tube (1) is closely sleeved on wire (4), the inwall of drainage tube (1) is provided with multiple puncture (5) penetrating insulating barrier, the lateral ends of the side of wire electrode (2) of right angle L shape is ball and vertical end is fixedly connected with drainage tube (1), on the transverse bar of described side of wire electrode (2), suit is fixed with the glass bushing (8) of a monitoring lightning stroke flashover, one end of ground side electrode (3) is ball and the other end is fixedly connected with insulator (6) bottom, ground side electrode (3) is the meander line structure being provided with a mountain ridge (7) near one end of ball, the electrode tip of described side of wire electrode (2) and ground side electrode (3) definitely aligns.
2. parallel gap lightning protection device according to claim 1, is characterized in that: the puncture (5) on the inwall of described drainage tube (1) is highly greater than the thickness of insulating layer of wire (4).
3. parallel gap lightning protection device according to claim 1 and 2, is characterized in that: the short circuit distance of described side of wire electrode (2) and ground side electrode (3) is 22-33 ㎜.
4. parallel gap lightning protection device according to claim 1 and 2, is characterized in that: described insulator (6) bottom is quadrangular, and ground side electrode (3) and insulator (6) bottom are fixed together by two angle steel bolt that is connected.
5. parallel gap lightning protection device according to claim 1 and 2, is characterized in that: described puncture (5), drainage tube (1), side of wire electrode (2) and ground side electrode (3) make by the high temperature resistant and carbon steel that intensity is high.
CN201420741891.1U 2014-12-02 2014-12-02 Parallel gap lightning protection device Active CN204315320U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420741891.1U CN204315320U (en) 2014-12-02 2014-12-02 Parallel gap lightning protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420741891.1U CN204315320U (en) 2014-12-02 2014-12-02 Parallel gap lightning protection device

Publications (1)

Publication Number Publication Date
CN204315320U true CN204315320U (en) 2015-05-06

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Application Number Title Priority Date Filing Date
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Country Status (1)

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CN (1) CN204315320U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105390978A (en) * 2015-11-11 2016-03-09 国家电网公司 Lightning-caused breakage preventing method for insulated overhead line

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105390978A (en) * 2015-11-11 2016-03-09 国家电网公司 Lightning-caused breakage preventing method for insulated overhead line
CN105390978B (en) * 2015-11-11 2018-06-22 国家电网公司 The anti-lightning strike broken string method of insulated over-head line

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