CN107742881A - Virtual positive pole induction type lightning conducter lightning protection device on a kind of HVDC overhead transmission line - Google Patents

Virtual positive pole induction type lightning conducter lightning protection device on a kind of HVDC overhead transmission line Download PDF

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Publication number
CN107742881A
CN107742881A CN201711121030.8A CN201711121030A CN107742881A CN 107742881 A CN107742881 A CN 107742881A CN 201711121030 A CN201711121030 A CN 201711121030A CN 107742881 A CN107742881 A CN 107742881A
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China
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positive pole
lightning
voltage
transmission line
vacantly
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张健
张京伦
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张京伦
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Priority to CN201711121030.8A priority Critical patent/CN107742881A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/044Physical layout, materials not provided for elsewhere

Abstract

Virtual positive pole induction type lightning conducter lightning protection device on a kind of HVDC overhead transmission line, it is made up of virtual positive pole 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;Virtual positive pole lightning conducter and steel tower positioned at steel tower top then are connected with the positive wire of transmission line of electricity vacantly after insulation with high voltage reactor and high-voltage and current-limitation resistor string tie;The virtual positive pole lightning conducter vacantly to insulate is fixed on the top top of steel tower by insulator, and vacantly insulated with the earth, the magnitude of voltage for the above earth potential being equal with positive pole circuit is presented, the virtual positive pole lightning conducter is connected with direct current arrester simultaneously, high pressure guide resistor and direct current arrester and tie, high-tension shielding coaxial cable and direct current arrester and tie, the passage of high current is drained during lightning protection overvoltage of the direct current arrester as the virtual positive pole lightning conducter vacantly to insulate.

Description

Virtual positive pole induction type lightning conducter lightning protection on a kind of HVDC overhead transmission line Device
Technical field
The present invention relates to virtual positive pole induction type lightning conducter lightning protection on a kind of power engineering HVDC overhead transmission line Device, belong to the technical field of safety protection of HVDC overhead transmission line.
Background technology
Since HVDC Transmission Technology is applied from the middle of last century all over the world in power system, in remote, Large Copacity Show clear advantage in terms of power system interconnection, HVDC Transmission Technology not only increase power system economic instruction, Technical performance, and make 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 is put into operation, and China's electric utility, which has been enter into, to be sent out at a high speed The duration of an exhibition.
The end of the year in 2010, China have established 5 DC power transmission lines and Central China, East China Power Grid have been connected, south electric network 2 alternating current-direct current passways for transmitting electricity arranged side by side are formed, and are connected by a DC power transmission line with Central China Power Grid.HVDC Transmission Technology exists Very important effect will be played in China's transferring electricity from the west to the east and on national network engineering.
From the point of view of the construction of current China's power network 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 thunderbolt, icing, The test of many factors such as filth.Especially Lightning Disaster.Statistics shows that thunderbolt 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, is successively built 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 thunderbolt statistics of regional DC line.
From the data of table two, the lightning flashover rate of China's ± 500kV circuits is jumped apparently higher than exchange 500kV circuits thunderbolt Lock rate.From data in table, positive polarity wire lightning strike accident occupies 87.5%, because the thunder and lightning in China is with negative polarity Thunder is (accounting for 90%) in the majority.
The Guangzhou DC line lightning flashover rate statistical form of table two
The lightning protection measures of existing direct current overhead transmission line: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.
The lightning protection safeguard procedures to hvdc transmission line have at present:1) the shielding flashover strike that thunderbolt circuit occurs is reduced, it is main Will and effective measures are to reduce earth-wire protection angle.Because 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 produce in phase shielding problem, 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) reduce and thunderbolt circuit counterattack flashover strike occurs, it is main Want measure to be increase line insulation and reduce pole tower ground resistance.
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.Because 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 are also using horizontally arranged.It is required that on shaft tower between two ground wires Distance is not to be exceeded 5 times of vertical range between ground wire and wire, and ground wire typically uses 15 ° of left sides to the shielding angle of wire, double earth wire 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 mountain region, the shielding angle of ground wire is controlled at -10 DEG C, lies in ground ground wire and outside is led The shielding angle of line is controlled at 10 °.Ground wire is completely directly grounded, and the horizontal range between two ground wires, which is no more than between ground wire and 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 usesRound steel.
According to the statistical conditions of operation department, such as Burner zone-(circuit is complete for Shanghai ± 800kV extra-high voltage direct-current transmission engineerings 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);Silk 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 flashover Rate be 0.095 time/(100km).Lightning flashover rate service data is 0.1 time/(100km) left and right.
It was found from China's ± 500kV operating experiences, lightning stroke flashover easily occurs for positive polarity wire, and this is because China's thunder and lightning is big Mostly negative polarity, 90% is accounted for, 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.Because direct-current working volts are high, its influence factor is more obvious, therefore hitting away from also needing to consider for wire Operational voltage value thereon.And according to preliminary judgement, lightning stroke flashover accident is the shielding flashover occurred on positive pole polar curve, from From the point of view of existing operating experience.Positive polarity wire " drawing thunder " positive effect in UHVDC Transmission Lines, than negative polarity wire more It is prone to be struck by lightning.
Thunder and lightning theoretical description on atmospheric physics:
Thunder and lightning is exactly the electrical phenomena occurred in thundercloud, and also only thundercloud is only possible to produce thunder and lightning.
Lightning refers to the discharge process between distinct symbols charged centers in cumulonimbus, or in cloud charged centers and the earth and Discharge process between atural object, or the electric discharge in cloud between charged centers and the outer air distinct symbols atmospheric charge-site of cloud Journey.
Cloud sudden strain of a muscle is divided into according to lightning position and ground dodges two major classes, wherein:
(1) cloud dodges:Refer to not be in contact lightning with the earth and atural object.It is empty that it includes lightning, high in the clouds lightning and cloud in cloud 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) dodge:Refer to the discharge process between charged centers and the earth and atural object in cloud, also refer to send out with the earth and atural object The lightning of raw contact.
The test result of lightning intrusion scientific worker shows, when being greatly 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, which dodges, accounts for more than 2/3rds of whole lightnings. Why the lightning strike probability of direct-flow positive pole circuit is more than alternating current circuitAnalyze herein:Because most (90%) is negative polarity Thunder, flashed by positive pole generation of the negative polarity electric charge of cloud layer easily with wire with the cloud of positive and negative charge electric discharge 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 for where.
The content of the invention
It is an object of the invention to overcome the shortcomings of the prior art, and provide a kind of structure composition rationally, simply, make With conveniently, reliably, it can effectively prevent from being struck by lightning, ensure the high pressure of the HVDC overhead transmission line safe operation of power engineering Virtual positive pole induction type lightning conducter lightning protection device on direct-current overhead power transmission line.
The purpose of the present invention is completed by following technical solution, virtual on a kind of HVDC overhead transmission line Positive pole induction type lightning conducter lightning protection device, it is virtual positive pole lightning conducter, high voltage reactor, the high-voltage and current-limitation electricity by vacantly insulating Device, direct current arrester, high pressure guide resistor, suspension insulator, high-tension shielding coaxial cable is hindered to form;It is described to be located at direct current frame Above empty transmission line of electricity positive pole, i.e. after the hanging insulation of virtual positive pole lightning conducter and steel tower on steel tower top with high voltage reactor With high-voltage and current-limitation resistor string tie, then it is connected with the positive wire of HVDC transmission line;
The virtual positive pole lightning conducter vacantly to insulate is fixed on the top top of steel tower by insulator, and vacantly with greatly Ground is insulated, and the magnitude of voltage for the above earth potential being equal with positive pole circuit is presented, and the virtual positive pole lightning conducter is taken shelter from the thunder with direct current simultaneously Device is connected, and high pressure guide resistor and direct current arrester and tie, core conductor and the direct current of high-tension shielding coaxial cable are taken shelter from the thunder Device and tie, excretion is big during lightning protection overvoltage of the direct current arrester as the virtual positive pole lightning conducter vacantly to insulate The passage of electric current.
As preferred:The spacing distance that described lightning protection device is arranged in HVDC overhead transmission line be 50~ 100 kilometers are a unit group;Described high voltage reactor is the reactor of the more number of turn windings of iron core type;Described high-voltage and current-limitation Resistor and high pressure guide's resistor are cement formula or ceramic-type high-voltage resistor;Described suspension insulator is XP-70 The universal outdoor insulator or rod type column support type insulator of type;From stress levels and the voltage class phase in transmission line of electricity Matching;Described 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 cored wire head end of cable inner conductor layer is connected with the virtual positive pole lightning conducter vacantly to insulate, the tail of cable The hanging insulation in end, is supported by bar type column support type insulator and fixed, the outer shield conductor of cable is connected with the earth earthing pole.
The invention belongs to the transformation to prior art, has structure composition rationally, simply, easy to use, reliable, can be effective Prevent be struck by lightning, the features such as ensureing the HVDC overhead transmission line safe operation of power engineering.
Brief description of the drawings
Fig. 1 is the not engineered lightning conducter BL structural representations of DC power transmission line traditional type.
Fig. 2 is that DC power transmission line " virtual positive pole " induction type lightning conducter transforms schematic diagram.
Fig. 3 is " virtual positive pole " induction type lightning protection architectural schematic in HVDC transmission system.
Fig. 4 is DC power transmission line traditional lightning protection wire body system top view.
Fig. 5 is that lightning conducter transforms schematic diagram above DC power transmission line positive polarity wire.
Fig. 6 is that the virtual positive pole lightning conducter of DC power transmission line transforms diagrammatic cross-section
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail:Shown in Fig. 2-6, a kind of high straightening of the present invention Virtual positive pole induction type lightning conducter lightning protection device on overhead transmission line is flowed, it is the virtual positive pole lightning conducter by vacantly insulating BL, high voltage reactor DK, high-voltage and current-limitation resistor R1, direct current arrester FZ, high pressure guide's resistor R2, suspension type (column support type) it is exhausted Edge JY, high-tension shielding coaxial cable L are formed;It is described to be located at direct-current overhead power transmission line positive pole (also known as I poles) top, be located at Virtual positive pole lightning conducter BL (the also referred to as 1# lightning conducters BL on steel tower top1) with steel tower vacantly insulation after with high voltage reactor line Enclose DK and high-voltage and current-limitation resistor R1Series wiring, then be connected with the positive wire of HVDC transmission line;
The virtual positive pole lightning conducter BL vacantly to insulate is fixed on the top top of steel tower by insulator JY, and vacantly Insulated with the earth, be presented the magnitude of voltage of above earth potential being equal with positive pole circuit, the virtual positive pole lightning conducter BL and meanwhile with it is straight Flow arrester FZ connections, high pressure guide's resistor R2With direct current arrester FZ and tie, high-tension shielding coaxial cable L core is led Body and direct current arrester FZ and tie, direct current arrester FZ is as the anti-of the virtual positive pole lightning conducter BL1 vacantly to insulate The passage of high current is drained during thunder grounding surge.
Shown in figure, spacing distance that described lightning protection device is arranged in HVDC overhead transmission line for 50~ 100 kilometers are a unit group;Described high voltage reactor DK is the reactor of the more number of turn windings of iron core type;Described high pressure limit Flow resistor R1, high pressure guide's resistor R2It is cement formula or ceramic-type high-voltage resistor;Described suspension insulator JY is The universal outdoor insulator or rod type column support type insulator of XP-70 types;From the voltage in stress levels and transmission line of electricity Grade matches;Described 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 cored wire head end of cable inner conductor layer is connected with the virtual positive pole lightning conducter BL vacantly to insulate, electricity The tail end of cable is vacantly insulated, and is supported and fixed by bar type column support type insulator, and outer shield conductor and the earth of cable are grounded Pole connects.
The schematic illustration of the present invention:The HVDC overhead transmission line of prior art is subject to be struck by lightning, mainly Claim with just (+) pole on the transmission line of electricity of I poles, occupy more than 90% lightning strike probability, study carefully the original in its atmospheric physics Cause, it is that the probability of negative polarity thunder and lightning is higher, it is also possible to think the sudden strain of a muscle when the enough height of shaft tower, occurred on positive pole Electricity 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.That is the "+" and "-" of positive pole circuit The process of " sudden strain of a muscle of half cloud " of flashover electric discharge directly occurs for the powered cloud cluster of electric charge, so can just cause positive pole line fault especially high Where the reason for (up to 90%).
The present invention is transformed the traditional lightning protection line above positive pole circuit, first by former lightning conducter on steel tower it is straight The line end of ground connection is removed, and the method being fixedly connected by suspension insulator JY with steel tower, so that lightning conducter BL is able to hanging with the earth and insulated, then passes through high voltage reactor DK and high-voltage and current-limitation resistor R1After series connection with positive pole circuit I Pole connects, and the essence in its electric loop is to make lightning conducter BL and positive pole circuit conductive bit, and in the top of positive pole circuit, this Sample, because lightning conducter BL is higher than wire, the negative electrical charge in thundercloud is easier access to the lightning conducter BL with virtual positive pole, passes through this Device carries out flashover electric discharge in advance in a manner of " sudden strain of a muscle of half cloud ", so as to protect positive pole transmission line of electricity to exempt from by negative polarity thunder and lightning Electric discharge, and a kind of Novel lightning-proof method carried out.
1st, the purpose that the present invention sets high voltage reactor coil DK is when by being struck by lightning, because lightning wave is a kind of high frequency The pulse current of rate, its frequency f=100KZ~1MHZ or so.Therefore, using reactor by inductor principle:XL=2 π fL, when When f is sufficiently large, the reactance value presented becomes very big, thus reactor can effectively stop the advance of lightning wave, with protection The safety of " positive pole " transmission line of electricity I poles.But for direct current, it is conducting, therefore can be by electricity guiding to lightning conducter BL- (1) above.
2nd, high-voltage and current-limitation resistor R1Setting when being for thunderbolt in the case of being dodged as lightning conducter BL by ground, due to keeping away Thunder device FZ is acted, in this way it is possible to make the Failure risk of positive pole circuit and the earth direct short-circuit, to reduce and controlling straight-flow system Short circuit current and be provided with high-voltage and current-limitation resistor device R1, its impedance value is by the safe short circuit current of straight-flow system controlled Value designs impedance value.
3rd, the high pressure guide's resistor R for the high impedance being connected between virtual positive pole lightning conducter BL and the earth2Effect be to make Ground wire has the leading role of the earth electric charge, because 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 thunderbolt with ground and protect Shield positive pole circuit exempts from the effect of thunderbolt.
4th, 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 its lightning wave is 1MHZ When, the capacitor value of cableXcCapacitive reactance is greatly reduced, and illustrates profit The high fdrequency component of lightening pulse ripple is can absorb with the cable.
In this programme, make somebody a mere figurehead the lightning-arrest line apparatus above the negative polarity wire of DC power transmission line and maintain ground wire to carry out directly The original state for connecing earthing mode is not transformed.
Embodiment:The present invention is by that will be located above direct-current overhead power transmission line " just " polar conductor, originally by tower ground connection Lightning conducter BL removed, with the ground link of steel tower by suspension insulator JY carry out it is hanging after, then by high voltage reactor DK, high-voltage and current-limitation resistor R1After concatenation, bridge on the transmission pressure of " positive pole ".Meanwhile lightning conducter BL passes through arrester FZ With high pressure guide's resistor R2After parallel connection with the earth (steel tower) mode that is attached, in this, as a unit group wiring, In very long transmission line of electricity, at interval of 50~150KM, the apparatus of such a unit is set.
The type selecting of specific equipment is as follows:
1st, high voltage reactor DK, by thunderbolt voltage be 1000kV when, pour in after the electric current of direct-flow positive pole wire more than 100A Level calculation reactor reactance value XL
Inductance value XL=2 π fL (reactance induction reactance formula)
If to take lightning current frequency be 5KHZ, 10000 Ω=2 π × 5000L,Henry, designed electricity Anti- device inductance value is L=0.15 Henry value, is not less than 4mm with line footpath2Enamel-covered wire coiling.By reactor design principle, take The a diameter of D of reactorPJDuring=60cm, number of turn N takes 500 circles.Manufacturer is Shenyang Transformer Factory.
2nd, high-voltage and current-limitation resistor R1Selection:The purpose for setting the resistance is when lightning conducter BL is by being struck by lightning, and is produced It high potential, can turn on arrester FZ, and for DC power transmission line, when " positive pole " wire is with greatly connecting, then phase When the state that short circuit is in transmission line of electricity, because in DC transmission system, wherein a wire is to be greatly used as conductor Use, 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 a path for direct current, without obvious 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.
3rd, thunder guide's resistor R is drawn2Selection
After being maked somebody a mere figurehead due to the lightning conducter BL above positive pole, it will the upward leader for influenceing ground sudden strain of a muscle thunderbolt acts on, therefore has Necessity makes the arrester with greatly there is the interface channel of a weak charge, but because the current potential run when lightning conducter BL is flat is up to DC rated voltage value Ue, to reduce loss value, take the power attenuation value of the resistance value usually be 1000 watts or so when, by This,Power taking resistance is guide's resistor of high-voltage high resistance.Resistor Cement ceramic resistor is also chosen by, producer is Shenzhen Guo Hua Electronics Co., Ltd.s.
4th, direct current arrester FZ selection
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 ± Exemplified by 500kV circuits, selected arrester is model YH20CXL-571/1200, manufacturer:State's net DianKeYuan Wuhan south is auspicious to be had Limit company.
5th, the selection (suspension type and rod type column support type) of insulator
Due to the lightning conducter BL in the positive wire overhead in DC power transmission line vacantly being insulated, the seal is fixed XP-70 suspension insulator, and determine according to the voltage class of circuit the piece number of the insulator of series connection, right ± 500kV leads to The mounting means of XP-70 25~30 overlapped in series of suspension insulator is often used, ZSW1- is selected to rod type column support type insulator 500/14K-3, manufacturer are Xi'an electroceramics factory.
6th, high-tension shielding coaxial cable L selects resistance to voltage levels in the crosslinked polyethylene coaxial cable of ± 500kV voltages, it is desirable to Thickness of insulating layer is more than 30mm, and wave impedance value is less than 20 Ω coaxial wire.It is high that it act as absorbing arrester FZ thunder and lightning Frequency pulse component, for the assimilation effect reached, it is desirable to which 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 connected with hanging ground wire BL, and lower end is in vacantly state of insulation, And fixed with rod type column support type insulator JY-6-1.The outer contact of cable, is connected with earthing pole, and the purpose is to utilize High pressure resistant capacity effect that capacitor layers between two conductors of coaxial wire are formed absorbs thunder and lightning high-frequency impulse ripple Energy.Cable selects producer:Crosslinking 330kV~500kV of Shandong Luneng cable factory production high pressure single insulated cable.

Claims (2)

1. virtual positive pole induction type lightning conducter lightning protection device on a kind of HVDC overhead transmission line, it is by vacantly insulating Virtual positive pole lightning conducter (BL), high voltage reactor (DK), high-voltage and current-limitation resistor (R1), direct current arrester (FZ), high pressure guide Resistor (R2), suspension insulator (JY), high-tension shielding coaxial cable(L)Form;It is characterized in that described make somebody a mere figurehead positioned at direct current Above transmission line of electricity positive pole, i.e. positioned at the virtual positive pole lightning conducter (BL) on steel tower top vacantly insulated with steel tower after with high pressure reactance Device (DK) and high-voltage and current-limitation resistor (R1) series wiring, then be connected with the positive wire of HVDC transmission line;
The virtual positive pole lightning conducter (BL) vacantly insulated is fixed on the top top of steel tower by insulator (JY), and vacantly Insulated with the earth, be presented the magnitude of voltage of above earth potential being equal with positive pole circuit, the virtually positive pole lightning conducter (BL) and meanwhile with Direct current arrester (FZ) connects, high pressure guide resistor (R2) and direct current arrester (FZ) and tie, high-tension shielding coaxial electrical The core conductor of cable (L) and direct current arrester (FZ) and tie, direct current arrester (FZ) as it is described vacantly insulate virtually just The passage of high current is drained during the lightning protection overvoltage of pole lightning conducter (BL).
2. virtual positive pole induction type lightning conducter lightning protection device on HVDC overhead transmission line according to claim 1, It is characterized in that the spacing distance that described lightning protection device is arranged in HVDC overhead transmission line is 50~100 kilometers is One unit group;Described high voltage reactor (DK) is the reactor of the more number of turn windings of iron core type;Described high-voltage and current-limitation resistance Device (R1) and high pressure guide resistor (R2) are cement formula or ceramic-type high-voltage resistor;Described suspension insulator (JY) It is the universal outdoor insulator or rod type column support type insulator of XP-70 types;From the electricity in stress levels and transmission line of electricity Pressure grade matches;Described high-tension shielding coaxial cable (L) is the high-tension cable with two-conductor structure, resistance to voltage levels with it is defeated Electric line voltage class matches, and the cored wire head end of cable inner conductor layer and the virtual positive pole lightning conducter (BL) vacantly insulated connect Connect, the tail end of cable vacantly insulate, and is supported and fixed by bar type column support type insulator, outer shield conductor and the earth of cable Earthing pole connects.
CN201711121030.8A 2017-11-14 2017-11-14 Virtual positive pole induction type lightning conducter lightning protection device on a kind of HVDC overhead transmission line Pending CN107742881A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108616115A (en) * 2018-05-02 2018-10-02 国网陕西省电力公司电力科学研究院 A kind of 110kV electric power line pole towers enter land mine current limitation method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108616115A (en) * 2018-05-02 2018-10-02 国网陕西省电力公司电力科学研究院 A kind of 110kV electric power line pole towers enter land mine current limitation method and device

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