CN207910458U - The virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road - Google Patents

The virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road Download PDF

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CN207910458U
CN207910458U CN201721512888.2U CN201721512888U CN207910458U CN 207910458 U CN207910458 U CN 207910458U CN 201721512888 U CN201721512888 U CN 201721512888U CN 207910458 U CN207910458 U CN 207910458U
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voltage
lightning
direct current
transmission line
positive
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张健
张京伦
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张京伦
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Abstract

The virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road, it is made of virtual positive lightning conducter, high voltage reactor, high-voltage and current-limitation resistor, direct current arrester, high pressure guide resistor, suspension insulator, the high-tension shielding coaxial cable vacantly to insulate;Positioned at steel tower top virtual positive lightning conducter with after steel tower vacantly insulation, and high voltage reactor and high-voltage and current-limitation resistor string connection line, then be connected with the positive wire of transmission line of electricity;The virtual positive lightning conducter vacantly to insulate is fixed on the top top of steel tower by insulator, and it vacantly insulate with the earth, the voltage value for the above earth potential being equal with positive circuit is presented, the virtual positive lightning conducter is connect with direct current arrester simultaneously, high pressure guide resistor and direct current arrester and connection line, high-tension shielding coaxial cable and direct current arrester and connection line, when lightning protection overvoltage of the direct current arrester as the virtual positive lightning conducter vacantly to insulate, drain the channel of high current.

Description

The virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road
Technical field
The utility model is related to a kind of virtual positive induction type lightning conducters in power engineering high voltage direct current overhead transmission line road Lightning protection device belongs to the technical field of safety protection of high voltage direct current overhead transmission line.
Background technology
Since HVDC Transmission Technology is applied all over the world in electric system from the middle of last century, in remote, large capacity Show clear advantage in terms of power system interconnection, HVDC Transmission Technology not only increase electric system economic instruction, Technical performance, and keep Operation of Electric Systems relatively reliable.
With " transferring electricity from the west to the east, north and south supply mutually are on national network " development of State Grid Corporation of China and CHINA SOUTHERN POWER company Implementation, the construction energetically of extra-high voltage alternating current-direct current transmission line of electricity and puts into operation, and China's electric utility has been enter into high speed and sends out The duration of an exhibition.
The end of the year in 2010, China have been established 5 DC power transmission lines and Central China, East China Power Grid are connected, south electric network 2 alternating current-direct current passways for transmitting electricity arranged side by side are formed, and are connected with Central China Power Grid by a DC power transmission line.HVDC Transmission Technology It will play the role of in China's transferring electricity from the west to the east and on national network engineering very important.
From the point of view of the construction of current China's power grid and expected development, line transmission distance is remote, and due to China's lineament, Transmission line of electricity will be Jing Guo large amount of complex climatic environment area, in these areas, transmission line of electricity will face lightning stroke, icing, The test of many factors such as filth.Especially Lightning Disaster.Statistics shows that lightning stroke circuit is the main original for causing line fault Cause.Based on ± 500kV grades, first Ge Zhou Ba-south bridge ± 500kV mainly was built from 1989 for China's DC power transmission line DC transmission engineering so far, successively builds together and has set 7 ± 500kV DC lines.Right ± 500kV the DC lines of State Grid Corporation of China Lightning flashover rate statistical conditions are shown in Table one.
Table one, State Grid Corporation of China's ± 500kV DC lines lightning flash over (2004~2007)
The characteristics of in order to show DC power transmission line lightning stroke flashover, table two give domestic lightening activity stronger Guangdong The lightning stroke statistical data of regional DC line.
From two data of table as it can be seen that the lightning flashover rate of China's ± 500kV circuits is apparently higher than exchange 500kV circuits lightning stroke jump Lock rate.By data in table as it can be seen that positive polarity conducting wire lightning strike accident occupies 87.5%, this is because the thunder and lightning in China is with negative polarity Thunder is (accounting for about 90%) in the majority.
Two Guangzhou DC line lightning flashover rate statistical form of table
The lightning protection measures of existing direct current overhead transmission line:The prior art is typically as ac high-voltage overhead transmission line, in iron The top of tower sets up the lightning-arrest line apparatus on two piece-root grafting ground.
Have at present to the lightning protection safeguard procedures of hvdc transmission line:1) the shielding flashover strike that lightning stroke circuit occurs is reduced, it is main It wants and effective measures are to reduce earth-wire protection angle.Since hvdc transmission line only has both threads, if lightning conducter is protected using negative Corner protector, will not because the distance of 2 lightning conducters widens lead to the problem of in phase shielding, this point is different from single backcrossing Flow Line, because This usual hvdc transmission line lightning conducter uses small shielding angle as far as possible.2) it reduces and lightning stroke circuit counterattack flashover strike occurs, it is main It is to increase line insulation and reduction pole tower ground resistance to want measure.
The specific requirement of DC line lightning protection is:Danger caused by the atmospheric over-voltage of superhigh voltage DC overhead transmission line Evil, while in view of importance in systems, to whole circuit still completely to set up ground wire.Since DC power transmission line is due to leading Line only has positive and negative polarities, therefore the two poles of the earth are in horizontally arranged, and two lightning conducters also use horizontally arranged.It is required that on shaft tower between two ground wires 5 times of vertical range between ground wire and conducting wire are not to be exceeded in distance, and ground wire is to the shielding angle of conducting wire, and double earth wire is generally using 15 ° of left sides It is right.
It is commonly designed handbook mesohigh DC transmission engineering and takes following schemes of prevention against lightning:
General part of path uses double earth wire, and in mountainous region, the shielding angle of ground wire is controlled at -10 DEG C, lies in ground ground wire and is led to outside The shielding angle of line is controlled at 10 °.Ground wire is completely directly grounded, and the horizontal distance between two ground wires, which is no more than between ground wire and conducting wire, hangs down 5 times of straight distance.Lightning conducter is to be grounded by base with steel tower, and grounding resistance meets design requirement.Under steel tower is drawn using 4 points Line is grounded, and earthing or grounding means is all made ofRound steel.
According to the statistical conditions of operation department, as (circuit is complete for Shanghai ± 800kV extra-high voltage direct-current transmission engineerings for Burner zone- A length of 1907km), lightning stroke flashover occurs for the First Year that puts into operation 2 times, and lightning flashover rate is 0.105 time/(100km);Brocade Screen-southern Jiangsu ± 800kV extra-high voltage direct-current transmission engineerings (total track length 2090km), every year on average lightning stroke flashover 2 times, lightning stroke are dodged Network rate be 0.095 time/(100km).Lightning flashover rate operation data is 0.1 time/left and right (100km).
From China's ± 500kV operating experiences it is found that positive polarity conducting wire is easy to happen lightning stroke flashover, this is because China's thunder and lightning is big Mostly negative polarity accounts for about 90%, this also illustrates that direct-current working volts are to have a significant impact to thunderbolt, especially for extra-high Press DC power transmission line.Due to direct-current working volts height, influence factor is more obvious, therefore hitting away from also needing to consider for conducting wire Operating voltage value thereon.And according to preliminary judgement, lightning stroke flashover accident is the shielding flashover being happened on positive polar curve, from From the point of view of existing operating experience.Positive polarity conducting wire " drawing thunder " in UHVDC Transmission Lines is with obvious effects, more than negative polarity conducting wire It is prone to be struck by lightning.
Thunder and lightning theoretical description about atmospheric physics:
Thunder and lightning is exactly the electrical phenomena being happened in thundercloud, and also only thundercloud is likely to generate thunder and lightning.
Lightning refer in discharge process or cloud in cumulonimbus between distinct symbols charged centers charged centers and the earth and Electric discharge in discharge process or cloud between atural object between charged centers and the outer air distinct symbols atmospheric charge-site of cloud Journey.
It can be divided into cloud according to lightning position and dodge and dodge two major classes with ground, wherein:
(1) cloud dodges:Refer to not being in contact lightning with the earth and atural object.It includes that lightning in cloud, high in the clouds lightning and cloud are empty Lightning.
Lightning refers to the discharge process between distinct symbols charged centers in cloud in cloud;
High in the clouds lightning refers to the discharge process between distinct symbols charged centers in two pieces of clouds.
(2) it dodges:Refer to the discharge process in cloud between charged centers and the earth and atural object, also refers to send out with the earth and atural object The lightning of raw contact.
When the test result of lightning intrusion scientific worker shows greatly to be struck by lightning, majority is negative electrical charge from thundercloud to big Ground discharges, and minority is positive charge on thundercloud to ground discharge.
Discovery is observed simultaneously, and the cloud of big electric discharge machining in gas dodges number and is more than ground sudden strain of a muscle, and cloud sudden strain of a muscle accounts for 2/3rds or more of whole lightnings. Why the lightning strike probability of direct-flow positive pole circuit is more than alternating current circuitIt analyzes herein:Because most (90%) is negative polarity Thunder, the cloud for easily occurring to discharge with positive and negative charge with the anode of conducting wire by the negative polarity charge of cloud layer flash as it is a kind of people For direct " the cloud sudden strain of a muscle " of mode, here it is the tripping rate with lightning strike of DC power transmission line to be higher than transmission line of alternation current tripping rate with lightning strike The reason of where.
Invention content
The purpose of the utility model is to overcome the shortcomings of the prior art, and it is reasonable, simple to provide a kind of structure composition It is single, it is easy to use, reliable, it can effectively prevent from being struck by lightning, ensure the high voltage direct current overhead transmission line safe operation of power engineering The virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road.
The purpose of this utility model is completed by following technical solution, a kind of high voltage direct current overhead transmission line road Virtual anode induction type lightning conducter lightning protection device, it is the virtual positive lightning conducter, high voltage reactor, high pressure limit by vacantly insulating Flow resistor, direct current arrester, high pressure guide resistor, suspension insulator, high-tension shielding coaxial cable are constituted;It is described it is virtual just Pole lightning conducter is located at direct-current overhead power transmission line anode top, is located at steel tower top, and the virtual positive lightning conducter and iron After tower vacantly insulate, with high voltage reactor and high-voltage and current-limitation resistor string connection line, then the anode with HVDC transmission line Conducting wire is connected;
The virtual positive lightning conducter vacantly to insulate is fixed on the top top of steel tower by insulator, and vacantly with greatly Ground insulate, and the voltage value for the above earth potential being equal with positive circuit is presented, and the virtual positive lightning conducter is lightning-arrest with direct current simultaneously Device connects, high pressure guide resistor and direct current arrester and connection line, and the core conductor and direct current of high-tension shielding coaxial cable are lightning-arrest Device and connection line, excretion is big when lightning protection overvoltage of the direct current arrester as the virtual positive lightning conducter vacantly to insulate The channel of electric current.
As preferred:The spacing distance that the lightning protection device is arranged in high voltage direct current overhead transmission line be 50~ 100 kilometers are a unit group;The high voltage reactor is the reactor of iron core type multiturn number winding;The high-voltage and current-limitation Resistor and high pressure guide's resistor are cement formula or ceramic-type high-voltage resistor;The suspension insulator is XP-70 The universal outdoor insulator or rod type column support type insulator of type;Select stress levels and the voltage class phase in transmission line of electricity Matching;The high-tension shielding coaxial cable is the high-tension cable with two-conductor structure, resistance to voltage levels and transmission line of electricity voltage Grade matches, and the core wire head end of cable inner conductor layer is connect with the virtual positive lightning conducter vacantly to insulate, the tail of cable The hanging insulation in end, is supported by bar type column support type insulator and is fixed, the outer shield conductor of cable is connect with the earth earthing pole.
The utility model belongs to the transformation to the prior art, has structure composition rationally, simply, easy to use, reliable, energy The features such as effectively preventing from being struck by lightning, ensureing the high voltage direct current overhead transmission line safe operation of power engineering.
Description of the drawings
Fig. 1 is the not modified lightning conducter BL structural schematic diagrams of DC power transmission line traditional type.
Fig. 2 is that schematic diagram is transformed in DC power transmission line " virtual anode " induction type lightning conducter.
Fig. 3 is " virtual anode " induction type lightning protection architectural schematic in HVDC transmission system.
Fig. 4 is DC power transmission line traditional lightning protection wire body system vertical view.
Fig. 5 is that schematic diagram is transformed in lightning conducter above DC power transmission line positive polarity conducting wire.
Fig. 6 is that virtually diagrammatic cross-section is transformed in positive lightning conducter to DC power transmission line
Specific implementation mode
The utility model is described in detail below in conjunction with attached drawing:Shown in Fig. 2-6, described in the utility model one The virtual positive induction type lightning conducter lightning protection device in kind high voltage direct current overhead transmission line road, it is the virtual anode by vacantly insulating Lightning conducter BL, high voltage reactor DK, high-voltage and current-limitation resistor R1, direct current arrester FZ, high pressure guide's resistor R2, suspension type (pillar Formula) insulator JY, high-tension shielding coaxial cable L constitute;The virtual anode lightning conducter BL is being located at direct-current overhead power transmission line just Pole (the also known as poles I) top is located at steel tower top, and virtual positive lightning conducter BL (the also referred to as 1# lightning conducters BL1) with Steel tower is vacantly after insulation, and high voltage reactor DK and high-voltage and current-limitation resistor R1 series wirings, then with HVDC transmission line Positive wire be connected;
The virtual anode lightning conducter BL vacantly to insulate is fixed on the top top of steel tower by insulator JY, and hanging Insulate with the earth, be presented the voltage value for the above earth potential being equal with positive circuit, the virtual anode lightning conducter BL and meanwhile with it is straight Flow arrester FZ connections, high pressure guide's resistor R2With direct current arrester FZ and connection line, the core of high-tension shielding coaxial cable L is led Body and direct current arrester FZ and connection line, direct current arrester FZ are anti-as the virtual positive lightning conducter BL1's vacantly to insulate The channel of high current is drained when thunder grounding surge.
As shown in the figure, the spacing distance that the lightning protection device is arranged in high voltage direct current overhead transmission line be 50~ 100 kilometers are a unit group;The high voltage reactor DK is the reactor of iron core type multiturn number winding;The high pressure limit Flow resistor R1, high pressure guide's resistor R2It is cement formula or ceramic-type high-voltage resistor;The suspension insulator JY is The universal outdoor insulator or rod type column support type insulator of XP-70 types;Select stress levels and the voltage in transmission line of electricity Grade matches;The high-tension shielding coaxial cable L is the high-tension cable with two-conductor structure, resistance to voltage levels and power transmission line Road voltage class matches, and the core wire head end of cable inner conductor layer is connect with the virtual anode lightning conducter BL vacantly to insulate, electricity The tail end of cable vacantly insulate, and is supported and is fixed by bar type column support type insulator, and outer shield conductor and the earth of cable are grounded Pole connects.
The principles of the present invention explanation:The high voltage direct current overhead transmission line of the prior art is subject to be struck by lightning, main If on the transmission line of electricity for claiming the poles I with positive (+) pole, 90% or more lightning strike probability is occupied, is studied carefully in its atmospheric physics The reason of, it is that the probability of negative polarity thunder and lightning is higher, it is also possible to think, when the enough height of shaft tower, on anode to be occurred Lightning be not necessarily dodge caused by, and be particularly likely that in a manner of " sudden strain of a muscle of half cloud " and lightning occur.The "+" of i.e. positive circuit with The process of " sudden strain of a muscle of half cloud " of flashover electric discharge directly occurs for the electrification cloud cluster of "-" charge, can just cause positive line fault special in this way Where the reason of not high (up to 90%).
The utility model will be transformed positioned at the traditional lightning protection line of electrode line road side, first by former lightning conducter in steel tower On the line end that the is directly grounded method being removed, and be fixedly connected with steel tower by suspension insulator JY, so that keep away Thunder line BL is able to hanging with the earth and insulate, then passes through high voltage reactor DK and high-voltage and current-limitation resistor R1After series connection with electrode line The road poles I connect, and the essence in electric loop is to make lightning conducter BL and positive circuit conductive bit, and in the top of positive circuit, In this way, since lightning conducter BL is higher than conducting wire, the negative electrical charge in thundercloud is easier access to, with the lightning conducter BL of virtual anode, pass through The present apparatus carries out flashover electric discharge in advance in a manner of " sudden strain of a muscle of half cloud ", to protect positive transmission line of electricity to exempt from by negative polarity thunder and lightning Electric discharge, and carry out a kind of Novel lightning-proof method.
1, the purpose of the utility model setting high voltage reactor coil DK is when by being struck by lightning, since lightning wave is a kind of High-frequency pulse current, frequency f=100KZ~1MHZ or so.Therefore, using reactor by inductor principle:XL=2 π FL, when f is sufficiently large, the reactance value presented becomes very big, thus reactor can effectively stop the advance of lightning wave, With the safety of the poles protection " anode " transmission line of electricity I.But for direct current, it is conducting, therefore can be by electricity guiding to keeping away Thunder line BL- (1) is above.
2, high-voltage and current-limitation resistor R1Setting when being for lightning stroke in the case of being dodged by ground as lightning conducter BL, due to keeping away Thunder device FZ actions, in this way it is possible to make the Failure risk of positive circuit and the earth direct short-circuit, to reduce and controlling direct current system The short circuit current of system and be provided with high-voltage and current-limitation resistor device R1, impedance value is by the straight-flow system safety short circuit electricity controlled Flow valuve designs impedance value.
3, it is connected to high pressure guide's resistor R of the high impedance between virtual anode lightning conducter BL and the earth2Effect be to make Ground wire has the leading role of the earth charge, since lightning conducter BL is in vacant state, when spot flash-type is struck by lightning, and lightning conducter BL guide's ability declines, high pressure guide's resistor R in parallel connection2Afterwards, ground wire can be improved to dodge the leading role of lightning stroke with ground and protect Effect of the positive circuit of shield from lightning stroke.
4, the use of the purpose of the parallel high voltage shielded cable L on arrester FZ is to provide the logical of high frequency for lightning current Road.Its principle isWhen the capacitance of cable is more than 0.01 μ f, the main high-frequency impulse of lightning wave is 1MHZ When, the capacitor value of cableXcCapacitive reactance is greatly reduced, and illustrates profit The high fdrequency component of lightening pulse wave is can absorb with the cable.
In the present solution, the lightning-arrest line apparatus above the negative polarity conducting wire of aerial DC power transmission line maintains ground wire to carry out directly The original state for connecing earthing mode is not to be transformed.
Embodiment:The utility model is by that will be located above direct-current overhead power transmission line " just " polar conductor, originally by tower The lightning conducter BL of ground connection is removed, after being carried out vacantly by suspension insulator JY with the ground link of steel tower, then by high-voltage electricity Anti- device DK, high-voltage and current-limitation resistor R1It after concatenation, bridges on the transmission pressure of " anode ".Meanwhile lightning conducter BL pass through it is lightning-arrest Device FZ and high pressure guide's resistor R2The mode being attached with the earth (steel tower) after parallel connection, connects in this, as a unit group In very long transmission line of electricity, at interval of 50~150KM, the apparatus of such a unit is arranged in line.
The type selecting of specific equipment is as follows:
1, high voltage reactor DK, by lightning stroke voltage be 1000kV when, pour in after the electric current of direct-flow positive pole conducting wire more than 100A Level calculation reactor reactance value XL
Inductance value XL=2 π fL (reactance induction reactance formula)
If take lightning current frequency be 5KHZ when, 10000 Ω=2 π × 5000L,Henry, designed electricity Anti- device inductance value is the value of L=0.15 Henry, is not less than 4mm with line footpath2Enameled wire coiling.By reactor design principle, take The a diameter of D of reactorPJWhen=60cm, the number of turns N takes 500 circles.Manufacturer is Shenyang Transformer Factory.
2, high-voltage and current-limitation resistor R1Selection:The purpose that the resistance is arranged is generated when lightning conducter BL is by being struck by lightning High potential can be such that arrester FZ is connected, and for DC power transmission line, when " anode " conducting wire is with being greatly connected to, then and phase When the state for being in short circuit in transmission line of electricity, because in DC transmission system, wherein a conducting wire is using greatly as conductor It uses, therefore, after arrester FZ is acted, it is necessary to control the short-circuit current value I of straight-flow systemD, and reactor DK for Be the equal of an access for direct current, without apparent hindrance function.Therefore, it is necessary to use current-limiting resistor R1To serve as control Short-circuit current value processed.It is 500kV grades to be assumed to be the straight-flow system voltage, and short circuit current controls the level in 100A, then resistance
Select current-limiting resistance R1Resistance value be 5k Ω, using powerful cement heat-stable ceramic high-voltage resistor, producer For Shenzhen Guo Hua Electronics Co., Ltd.s.
3, draw thunder guide's resistor R2Selection
After being maked somebody a mere figurehead due to the lightning conducter BL above anode, it will the upward leader for influencing ground sudden strain of a muscle lightning stroke acts on, therefore has Necessity makes the arrester, and there are one the interface channels of weak charge with the earth, but since the current potential run when lightning conducter BL is flat is up to DC rated voltage value Ue, to make loss value reduce, take the power attenuation value of the resistance value usually be 1000 watts or so when, by This,It is guide's resistor of high-voltage high resistance to take resistance value.Resistor It is also chosen by cement ceramic resistor, producer is Shenzhen Guo Hua Electronics Co., Ltd.s.
4, the selection of direct current arrester FZ
The direct current Special lightning arrester device for the voltage class that the selection of corresponding DC power transmission line matches, in this example with ± For 500kV circuits, selected arrester is model YH20CXL-571/1200, manufacturer:State's net DianKeYuan Wuhan south is auspicious to be had Limit company.
5, the selection (suspension type and rod type column support type) of insulator
Since the lightning conducter BL in the positive wire overhead in DC power transmission line vacantly insulating, the seal is fixed XP-70 suspension insulator, and determine that according to the voltage class of circuit, the piece number of concatenated insulator, right ± 500kV are logical It is often used the mounting means of 25~30 overlapped in series of suspension insulator of XP-70, rod type column support type insulator is selected ZSW1-500/14K-3, manufacturer are Xi'an electroceramics factory.
6, high-tension shielding coaxial cable L selects resistance to voltage levels in the crosslinked polyethylene coaxial cable of ± 500kV voltages, it is desirable that Thickness of insulating layer is more than 30mm, and wave impedance value is less than the coaxial wire of 20 Ω.It acts as the thunder and lightning for absorbing arrester FZ is high Frequency pulse component, for the assimilation effect reached, it is desirable that the length of the shielded cable is more than 100M, can two modes in parallel It is installed on from tower top to ground and mounts, wherein inner sandwich layer upper end is connect with hanging ground wire BL, and lower end is in vacantly state of insulation, and And it is fixed with rod type column support type insulator JY-6-1.The outer contact of cable, connect with earthing pole, and the purpose is to using together Capacitor layers between two conductors of shaft cable line are formed by high pressure resistant capacity effect to absorb the energy of thunder and lightning high-frequency impulse wave Amount.Cable selects producer:The high pressure single insulated cable of crosslinking 330kV~500kV of Shandong Luneng cable factory production.

Claims (2)

1. the virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road, it is virtual by what is vacantly insulated Positive lightning conducter (BL), high voltage reactor (DK), high-voltage and current-limitation resistor (R1), direct current arrester (FZ), high pressure guide's resistance Device (R2), suspension insulator (JY), high-tension shielding coaxial cable(L)It constitutes;It is characterized in that the virtual positive lightning conducter (BL) it is located at direct-current overhead power transmission line anode top, is located at steel tower top, and the virtual positive lightning conducter (BL) and iron Tower is vacantly after insulation, and high voltage reactor (DK) and high-voltage and current-limitation resistor (R1) series wiring, then with high-voltage dc transmission electric wire The positive wire on road is connected;
The virtual positive lightning conducter (BL) vacantly insulated is fixed on the top top of steel tower by insulator (JY), and hanging Insulate with the earth, be presented the voltage value for the above earth potential being equal with positive circuit, the virtual anode lightning conducter (BL) and meanwhile with Direct current arrester (FZ) connects, high pressure guide resistor (R2) and direct current arrester (FZ) and connection line, high-tension shielding coaxial electrical The core conductor of cable (L) and direct current arrester (FZ) and connection line, direct current arrester (FZ) as it is described vacantly insulate virtually just The channel of high current is drained when the lightning protection overvoltage of pole lightning conducter (BL).
2. the virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road according to claim 1, It is characterized in that the spacing distance that the lightning protection device is arranged in high voltage direct current overhead transmission line is 50~100 kilometers is One unit group;The high voltage reactor (DK) is the reactor of iron core type multiturn number winding;The high-voltage and current-limitation resistance Device (R1) and high pressure guide resistor (R2) are cement formula or ceramic-type high-voltage resistor;The suspension insulator (JY) It is the universal outdoor insulator or rod type column support type insulator of XP-70 types;Select stress levels and the electricity in transmission line of electricity Pressure grade matches;The high-tension shielding coaxial cable (L) be the high-tension cable with two-conductor structure, resistance to voltage levels with it is defeated Electric line voltage class matches, and the core wire head end of cable inner conductor layer and the virtual positive lightning conducter (BL) vacantly insulated connect It connects, the tail end of cable vacantly insulate, and is supported and is fixed by bar type column support type insulator, outer shield conductor and the earth of cable Earthing pole connects.
CN201721512888.2U 2017-11-14 2017-11-14 The virtual positive induction type lightning conducter lightning protection device in high voltage direct current overhead transmission line road Active CN207910458U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109586226A (en) * 2018-12-04 2019-04-05 金华八达集团有限公司科技信息分公司 The method and device of steel tower tower head overvoltage when a kind of inhibition transmission line lightning stroke

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109586226A (en) * 2018-12-04 2019-04-05 金华八达集团有限公司科技信息分公司 The method and device of steel tower tower head overvoltage when a kind of inhibition transmission line lightning stroke

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