CN106384966A - Line differentiated lightning protection management method - Google Patents
Line differentiated lightning protection management method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention relates to a line differentiated lightning protection management method. The method includes the steps of data collection, line tower lightning protection calculation, risk assessment, lightning type collection, lightning cause analysis and providing a management method. The management of lightning protection is realized through the steps of data collection, line tower lightning protection calculation, risk assessment, lightning type collection, lightning cause analysis and providing the management method, a prevention-first and comprehensive management rule of existing lines is achieved; overhead transmission line differentiated lightning protection work is carried out comprehensively; the differentiated configuration of line lightning withstand levels and lightning protection measures of different regions, different voltage levels and different importance can be realized; the lightning protection levels of core backbone grid frames, strategic transmission channels and important load power supply lines can be improved; power grid and equipment failure caused by lightning can be reduced; the safe and reliable operation of a large power grid can be ensured; and lightning trip-out rate and lightning accident rate can be decreased.
Description
Technical field
The present invention relates to line located lightning protection administering method.
Background technology
Overhead bare conductor road dielectric level low it is easy to suffer from thunderbolt to cause insulator arc-over line-outage contingency, 10kV insulate
Wire is subject to lightning-caused breaking.According to the statistics of relevant information, Zhejiang area to 2004, lightning-caused breaking accident and thunderbolt
Trip accident is just about 395 times：Since District of Shanghai uses insulated conductor, nearly hundred thunderbolt flashover faults are had resulted in.External
Having data to introduce, lightning-caused breaking accident accounts for always being struck by lightning 96.8%, and the data of Japan shows, lightning-caused breaking accident accounts for distribution
Net insulation fault obtains 36.8%.
The dielectric level of distribution line generally ratio is relatively low, and not only direct lightning strike can work the mischief, the overvoltage that induced lightening produces
Also lightening hazard can be produced, moreover, the lightning protection measures that distribution line can be taken are very limited, typically can not be lightning-arrest using setting up
The methods such as line, coupling ground wire, simply zinc oxide surge arresters protected.But spark gap is still only applicable to the line of distribution line
The protection of side and controller switching equipment is it is impossible to install in a large number on power distribution network, if whole distribution line is respectively mounted spark gap, due to
Quantity is many, therefore necessarily leads to high cost, investment big, operation maintenance difficulty, and spark gap is originally new in can be formed when damaging again
Trouble point, the reliability service of impact power distribution network, so the Lightning Protection of power distribution network is always affects power distribution network safe operation
Subject matter.The probability that transmission line of electricity is struck by lightning due to the area such as mountain area to be passed through, rivers, Qiu Ling is also very big, on circuit
" null value " and " bad value " insulator occur porcelain insulator used after longtime running so as to dielectric level reduces, and adds
The most of area in mountain area pole tower ground resistance is higher, thus " counterattack " rate is higher.Once occurring " counterattack ", powerful lightning current with
Power current can be beaten insulator fried, or even causes line-outage contingency.Now in order to antifouling flashover composite insulator application amount ratio is larger,
But it is exactly that resistance to thunder level is low that composite insulator has fatal defects, under lightning impulse, easily there is flashover.Silicone rubber synthesizes
Insulator is easier lightning stroke flashover because its Potential distribution is uneven, in flashover, powerful lightning current and power frequency continued flow meeting
Cause aluminum gold utensil scorification, aluminium-plated, spray last layer aluminium film on silicon rubber synthetic insulators surface, so that insulator is subject to permanent
Destroy.In order to prevent line insulator from sustaining damage it is necessary to protect insulator in thunderbolt, best bet is excessively electric in thunder and lightning
When pressure is raw, lightning current and its subsequent power frequency continued flow without flow through insulator surface, because if lightning current or power frequency continued flow stream
When crossing insulator surface, insulator more or less all can be made to sustain damage, and due to being the insulation knot of solid and gas interface
Structure, is affected by pollution severity of insulators and the impact of electric field distortion is unfavorable for extinguishing of electric arc, and that is, thunder and lightning probability of sustained arc is high, seriously
When insulator can be made to destroy completely, cause the accidents such as line tripping or broken string.
Content of the invention
The technical problem to be solved in the present invention is to provide line located lightning protection administering method, solves existing distribution wire Louis
The problem being struck by lightning.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions：Line located lightning protection is controlled
Reason method, comprises the following steps successively：
A) collection of data：Statistics collection is carried out to the line parameter circuit value of transmission line of electricity, and line parameter circuit value includes line corridor thunder
Electrical quantity and line characteristics parameter, line corridor lightning parameter is the thunder and lightning data running accumulation based on lightning monitoring system, with
The form of grid divides to line corridor, counts, analyzes and obtain and can reflect this line corridor different time, zones of different
The CG lightning density of lightening activity feature, the lightning parameter of amplitude of lightning current cumulative probability distribution, line characteristics parameter includes circuit
Essential information, tower structure and insulation, corridor topography and geomorphology, corridor topography and geomorphology includes flat type, mountain top type, mountain valley-type and mountain
Shelving；
B) overhead line structures lightning protection calculation：By EGM model height fitting analysis method to shaft tower in step a) mesorelief
Thunder and lightning is had mercy on and is hit probability and be respectively calculated, and computation structure is respectively：The shielding arc of flat type landform is parallel with domatic, hillside type
Under the shaft tower of landform, the exposure arc of hillside side wire increases, and the exposure arc of steep side wire reduces, the bar of mountain top type landform
The exposure arc of tower both sides wire all increases, and the exposure arc of the middle shaft tower both sides wire of mountain valley-type landform all reduces；
C) risk assessment：The data check transmission line of electricity corridor along the line lightening activity number over the years collected according to step a)
According to forming the lightening activity density map of transmission line of electricity, the easy minefield to transmission line of electricity and easily hit section and carry out statistical analysiss；
D) thunderbolt species is collected：Had mercy on according to the thunder and lightning that step b) calculates and hit the risk evaluation result that probability and step c) calculate
Collect type and the lightening hazard that lightning discharge causes circuit Lightning Over-voltage；
E) analyze cause of lightning stroke：The type of the circuit Lightning Over-voltage collected according to step d) and lightening hazard analysis thunderbolt
Reason；
F) administering method is proposed：Lightning protection measures are proposed according to the cause of lightning stroke that step e) analyzes.
Preferably, the building that the thunderbolt species in step d) is included near thunderbolt circuit connects sudden strain of a muscle device thunderbolt：Work as building
Thing connects sudden strain of a muscle device when being struck by lightning, and thunder and lightning moment is made producing strong LEMP, LEMP by air
For transmission medium, it is directly coupled on circuit, when the induced potential of coupling exceedes insulator resistance to thunder level, insulator can occur
Flashover is big to 10kV and below 0.4kV harm to the system；
Wire in thunderbolt：When wire is struck by lightning, may result in line tripping, porcelain vase to play fried, wire and blow, to distribution line
Road, transmission line of electricity, to exceed line ball road, extra high voltage line harm big；
Thunderbolt shaft tower top：For 35kV and with electric pressure harm greatly, to 110kV and system above according to earth resistance
Size and the whether unobstructed grade that calculates of lightning current release channel endanger；
Near thunderbolt circuit greatly：Thunder and lightning moment will produce strong LEMP, and LEMP passes through sky
Gas, as transmission medium, is directly coupled on circuit, when the induced potential of coupling exceedes insulator resistance to thunder level, insulator meeting
There is flashover, big to 10kV and below 0.4kV harm to the system；
Be struck by lightning powered thundercloud electrostatic induction or electric field induction on wire：Cause electrostatic induction, to 35kV and following system
Harm is big.
Preferably, in step d), lightening hazard includes that porcelain vase bursts, conductor cord disconnection, circuit are short-circuited earth fault and line
The very high lightning wave of amplitude is formed on road and causes apparatus insulated damage and power outage, according to lightening hazard, cause of lightning stroke can be entered
Row analysis, thus improve the efficiency of maintenance.
Preferably, the cause of lightning stroke in step e) includes the process analyses of transmission line caused by lightning strike, fried porcelain vase and burning are beaten in thunderbolt
Disconnected bare conductor analysis and insulated conductor breakage caused by lightning stroke Analysis on Mechanism, are conducive to operator to select suitable lightning protection measures, can root
Realize optimum lightning protection effect according to cause of lightning stroke.
Preferably, the lightning protection measures in step f) include the insulating properties of local strengthening insulated conductor, wiring thunderbolt is dodged
Network protector, the flashover path increasing insulator, portable protective gaps come over-voltage and installing zinc oxide overvoltage protection device, energy
Different lightning protection measures are selected according to different cause of lightning strokes, adapts to different occasions.
In sum, advantages of the present invention：1. pass sequentially through collection of data, overhead line structures lightning protection calculation, risk assessment, thunder
The step method hit species collection, analysis cause of lightning stroke and propose administering method realizes the improvement of lightning protection, has reached existing line
Put prevention first, the principle of comprehensive control, carry out the work of overhead transmission line differentiated lightning protection comprehensively, realize zones of different, difference
The differentiation configuration of electric pressure, different importance line lightning resisting level and lightning protection measures, improves core backbone frame, strategic
Passway for transmitting electricity, the lightning protection level of important load supply line, reduce electrical network and the equipment fault that damage to crops caused by thunder causes, and ensure bulk power grid peace
Full reliability service, reduces tripping rate with lightning strike and stroke-incidence rate；
2., by statistics collection is carried out to the line parameter circuit value of transmission line of electricity, can be joined according to the line corridor thunder and lightning of statistics collection
The problem of the damage to crops caused by thunder high risk zone of number and line characteristics parameter determination transmission line of electricity and generation damage to crops caused by thunder is analyzed comprehensively, can be fast
The damage to crops caused by thunder factor analyzing transmission line of electricity of speed, and the protective measure of economical rationality is formulated according to line parameter circuit value；
3. by overhead line structures lightning protection calculation, can calculate that the damage to crops caused by thunder risk of different topography and geomorphologies is high and difference not
Greatly, and transmission line of electricity Mulberry can be installed spark gap state carry out investigating, check its running status, can exclude due to spark gap
Die barrier and cause electrical network earth fault and bring fault face expand potential safety hazard；
4. risk assessment enables the easy minefield to transmission line of electricity and easily hits section and carry out statistical analysiss, realizes to transmission line of electricity
Region confirm degree of protection；
5. thunderbolt species is collected and is conducive to maintainer to analyze the species that thunderbolt in transmission line of electricity, is conducive to step thunder
Hit the analysis of reason, and according to cause of lightning stroke, transmission line of electricity being proposed for property safeguard procedures can be configured, and formulate many sets and have
Different characteristics Lightning Transformation scheme, and carry out Economic evaluation, determine optimal lightning Protection measure.
Specific embodiment
Line located lightning protection administering method, comprises the following steps successively：
A) collection of data：Statistics collection is carried out to the line parameter circuit value of transmission line of electricity, and line parameter circuit value includes line corridor thunder
Electrical quantity and line characteristics parameter, line corridor lightning parameter is the thunder and lightning data running accumulation based on lightning monitoring system, with
The form of grid divides to line corridor, counts, analyzes and obtain and can reflect this line corridor different time, zones of different
The CG lightning density of lightening activity feature, the lightning parameter of amplitude of lightning current cumulative probability distribution, line characteristics parameter includes circuit
Essential information, tower structure and insulation, corridor topography and geomorphology, corridor topography and geomorphology includes flat type, mountain top type, mountain valley-type and mountain
Shelving；
B) overhead line structures lightning protection calculation：By EGM model height fitting analysis method to shaft tower in step a) mesorelief
Thunder and lightning is had mercy on and is hit probability and be respectively calculated, and computation structure is respectively：The shielding arc of flat type landform is parallel with domatic, hillside type
Under the shaft tower of landform, the exposure arc of hillside side wire increases, and the exposure arc of steep side wire reduces, the bar of mountain top type landform
The exposure arc of tower both sides wire all increases, and the exposure arc of the middle shaft tower both sides wire of mountain valley-type landform all reduces；
C) risk assessment：The data check transmission line of electricity corridor along the line lightening activity number over the years collected according to step a)
According to forming the lightening activity density map of transmission line of electricity, the easy minefield to transmission line of electricity and easily hit section and carry out statistical analysiss；
D) thunderbolt species is collected：Had mercy on according to the thunder and lightning that step b) calculates and hit the risk evaluation result that probability and step c) calculate
Collect type and the lightening hazard that lightning discharge causes circuit Lightning Over-voltage；
E) analyze cause of lightning stroke：The type of the circuit Lightning Over-voltage collected according to step d) and lightening hazard analysis thunderbolt
Reason；
F) administering method is proposed：Lightning protection measures are proposed according to the cause of lightning stroke that step e) analyzes.Power distribution network lightning protection exists
Case study：
1. shaft tower problem：For positioned at hill-side or mountain top, the shaft tower that shaft tower span is big, drop is big is to suffer repeatability and serious
Property thunderbolt centrostigma, also easily there is lightning stroke flashover in the outside insulator chain of the shaft tower of big corner, thundercloud there may come a time when and circuit
Or shaft tower is parallel, thunderbolt sometimes even occurs in the lower section of circuit；In addition, when shaft tower is located at mountain top, circuit one or both sides are sudden and violent
Dew, far with the distance of the earth, then cause the earth that the lightning shielding effect of wire was lost efficacy, shaft tower is in such complexity landform
Under landforms, considerably increase and hit bar rate；Circuit is when passing through mountains low-to-middle in height valley floor, hills valley plain simultaneously, basin and Plain
Interleaved state, by mesoclimate, it is affected with ratio is larger, the boundary location of different soils resistivity is easier thunderbolt thing
Therefore；By way of with a varied topography changeable, circuit takes double circuits on same tower road to set up, due to symmetric arrays, with famous prime minister geometric position one to shaft tower
Cause, dielectric level also quite so that the geometrical coupling ratio of each phase conductor differs greatly, and between parallel erected on same tower circuit geometry away from
Lead to induced voltage higher from less, mutual sensing and coupling, make line influence lightning voltage too high, in addition have around shaft tower
When pool, paddy field, when thundercloud is to circuit ground discharge nearby, by the heterocharge of lightning induction rapidly to thunderbolt in the earth
Point two side shiftings, and electrical conductivity of water will be far longer than the electrical conductivity of surrounding soil, thus leading to shaft tower when being struck by lightning,
The induction lightening overvoltage producing in circuit leads to line tripping.Circuit approach mountain rock Soils In The Region resistivity is higher, causes bar
Tower grounding resistance of transmission value is exceeded, is also the major reason causing distribution line lightening hazard to take place frequently, is sent out by field test
Existing, in 1500 Ω m～2000 Ω m, generally higher, part pole tower ground resistance is also for the soil resistivity around overhead line structures
Reach 2400 Ω m, because soil resistivity is higher, cause the earth resistance of shaft tower to be extremely difficult to regulatory requirements, bar
When tower earth resistance height can cause shaft tower to be struck by lightning, shaft tower current potential raises, and often back flashover accident occurs, thus reducing
The resistance to thunder level of circuit.
2. the distance problem of overhead transmission line infall：When different electric pressure aerial lines intersect, or distribution line and its
During his circuit (as communication line) scissors crossing, if upper and lower distance is less, the air gap may be punctured by thunder and lightning, and
High and low pressure circuit is joint used, or even telephone wire, broadcast wire and closed-circuit television line are all erected above distribution transforming, in these intersections
In span line, easily form the induced overvoltage that voltage magnitude is up to 300～400kV, so that cross link is tripped simultaneously
Fault, and cause the non-selective action of relay protection, cause the expansion of systematic failures.If punctured in cross point, also
The controller switching equipment on the relatively low circuit of voltage can be caused, especially the electrical equipments such as neighbouring distribution transformer are caused to damage, very
To causing human casualty accident.
The building that thunderbolt species in step d) is included near thunderbolt circuit connects sudden strain of a muscle device thunderbolt：When building connects sudden strain of a muscle dress
Put when being struck by lightning, thunder and lightning moment will produce strong LEMP, LEMP passes through air is used as transmission Jie
Matter, is directly coupled on circuit, and when the induced potential of coupling exceedes insulator resistance to thunder level, insulator can occur flashover, right
10kV and below 0.4kV harm to the system is big；
Wire in thunderbolt：When wire is struck by lightning, may result in line tripping, porcelain vase to play fried, wire and blow, to distribution line
Road, transmission line of electricity, to exceed line ball road, extra high voltage line harm big；
Thunderbolt shaft tower top：For 35kV and with electric pressure harm greatly, to 110kV and system above according to earth resistance
Size and the whether unobstructed grade that calculates of lightning current release channel endanger；
Near thunderbolt circuit greatly：Thunder and lightning moment will produce strong LEMP, and LEMP passes through sky
Gas, as transmission medium, is directly coupled on circuit, when the induced potential of coupling exceedes insulator resistance to thunder level, insulator meeting
There is flashover, big to 10kV and below 0.4kV harm to the system；
Be struck by lightning powered thundercloud electrostatic induction or electric field induction on wire：Cause electrostatic induction, to 35kV and following system
Harm is big.
In step d), lightening hazard includes that porcelain vase bursts, conductor cord disconnection, circuit are short-circuited shape on earth fault and circuit
Become the very high lightning wave of amplitude cause apparatus insulated damage and power outage, cause of lightning stroke can be carried out point according to lightening hazard
Analysis, thus improve the efficiency of maintenance.
Weigh the resistance to thunder level that line thunder protection performance quality important indicator includes lightning outage rate and circuit, circuit thunder
Hit the line tripping number of times that trip-out rate is that per 100 km circuit annual (converting under 40 Thunderstorm Days) is caused by thunderbolt, circuit
Resistance to thunder level is to cause the maximum amplitude of lightning current of line insulator flashover during thunderbolt circuit, the resistance to thunder level of circuit is higher,
Tripping rate with lightning strike will be lower, illustrates that the lightning protection properties of circuit are better.
Circuit trips because of thunderbolt and must possess two conditions：One is that the lightning surge producing during thunderbolt has exceeded circuit
Dielectric level cause line insulation impulse flashover, but because the thunder and lightning persistent period only has tens microseconds, at this moment line switching is
Have little time to trip；Two is that impulse flashover switchs to stable power frequency arc then, for 10kV circuit be exactly define alternate short
Road, just can lead to line tripping.
Circuit is short-circuited earth fault：The action time of lightning surge very short although (tens of microseconds), wire pair
After ground (lightning conducter or shaft tower) occurs flashover, power-frequency voltage will continue electric discharge along this flashover passage, and then develop into power frequency
Arcing ground, 10kV circuit occurs to have no effect on the symmetrical of power supply during single-phase earthing, and therefore at this moment circuit does not trip, and simply sends out
Go out ground signalling, be available for operations staff's time check circuit of O.5～2 hours, find earth point and exclude earth fault.But such as
Fruit at this moment earth point power frequency arc when combustion when go out and will produce the very high arc grounding over-voltage of amplitude in system, cause low insulation
The electrical equipment of level damages, or because at this moment thunderbolt causes circuit other to be mutually grounded thus forming phase fault again, relay protection
Device horse back action will make line tripping, causes power outage.
The very high lightning wave of amplitude also can be formed on the line, when mine transmitting device is to transformer station, just during thunderbolt circuit
The lightning wave catadioptric wave process of complexity can be caused in transformer station, make Substation Electric Equipment insulate bear very high excessively electric
Pressure.Because the dielectric level of electrical equipment in transformer station is lower than the dielectric level of circuit, cause apparatus insulated damage, cause bigger
Power outage.
Cause of lightning stroke in step e) includes the process analyses of transmission line caused by lightning strike, thunderbolt is played fried porcelain vase and blown bare conductor
Analysis and insulated conductor breakage caused by lightning stroke Analysis on Mechanism, are conducive to operator to select suitable lightning protection measures, can be former according to being struck by lightning
Because realizing optimum lightning protection effect.
The process of transmission line caused by lightning strike includes following three kinds of situations：
1., near circuit during thunderbolt, LEMP passes through the electromagnetic induction in space on circuit, leads to line voltage distribution
Exceeded insulator 50% impulse flashover voltage when, insulator will edge flashing lead to trip.Near circuit during thunderbolt, produce
Raw LEMP senses on wire, and usually three-phase produces simultaneously, and flashover forms arc short-circuit tripping operation to three-phase simultaneously；
2. circuit is subjected to attack directly and is struck by lightning, and porcelain vase is directly broken by thunderbolt or wire blows, three phase isolated son meeting flashover simultaneously
Cause transformer station；
3. when shaft tower top is subjected to thunderbolt, make grounding device because steel reinforced concrete pole is typically no, be all to utilize shaft tower
Natural grounding based on, electric current do not have release channel to lead to insulator is anti-phase punctures flashover.
Thunderbolt is played fried porcelain vase and is blown bare conductor analysis：Occur negative polarity lightning current typically little than forehand lightning current, just
Hitting property thunder and lightning is generally 10%, the 10kV circuit of lightning strike density when suffering from forehand thunderbolt, powerful lightning current and power current
Insulator can be beaten fried, or even cause line-outage contingency, when circuit suffers from negative polarity lightning current, cause tripping operation, insulator surface porcelain
Glaze is damaged, causes tripping operation many after upward lightning strikes, and descending thunderbolt causes dozen fried porcelain vase and line-outage contingency many.
Insulated conductor breakage caused by lightning stroke Analysis on Mechanism：When insulated conductor is struck by lightning, lightning surge causes insulator arc-over,
And puncture the insulating barrier of wire, and the insulant near breakdown point, hinder electric arc along conductive line surfaces to two side shiftings, thus
Electric arc can only burn in breakdown point, the up to power frequency arc current convergence of kilo-ampere on insulation breakdown point, and in chopper
Soon wire is fused before tripping operation.
The factor of impact insulated conductor breakage caused by lightning stroke includes line insulation level and probability of sustained arc, power frequency short circuit current and thunder and lightning
The heat producing；
Line insulation level and probability of sustained arc：When thunderbolt acts on insulator, the flashover of insulator depend on overvoltage value and
Line insulation level, along working voltage average gradient E=U2/ √ 3 L of flashover path；
L is flashover length (m), and U2 is rated line voltage；
Probability of sustained arc is as the reduction of E and reduces, by the data analysiss of arc spark discharge process it is concluded that,
During E≤7～10kV/m, probability of sustained arc is zero.
The heat that power frequency short circuit current is produced with thunder and lightning：Cause heat and the arc time of electric arc fusing insulated conductor
Relevant, the heat Q=I2RT that arc current produces, wherein：I be arc current, R be arc resistance, T be action time it is assumed that
The lightning wave wave head time is 2 μ s, and thunder and lightning amplitude is 1kA；Power frequency short circuit current action time is 0.2s, and short circuit current is 1kA.Then
Calculate the heat understanding power frequency continued flow generation by above formula formula by bigger than the heat that lightning current produces 10000 times.Feel as can be seen here
Answer the inducement that overvoltage is lightning-caused breaking, and power frequency continued flow is then the determiner causing exhausted line conductor cord disconnection.
Lightning protection measures in step f) include the insulating properties of local strengthening insulated conductor, the protection of wiring lightning stroke flashover
Device, the flashover path increasing insulator, portable protective gaps come over-voltage and installing zinc oxide overvoltage protection device, can be according to not
Same cause of lightning stroke selects different lightning protection measures, adapts to different occasions.
It is lower than zinc oxide overvoltage protection device that wiring lightning stroke flashover protector has integrated engineering expense, and it is certainly
Band fitting is it is not necessary to do down conductor and earthing pole；Life-span is more than 2 times of zinc oxide overvoltage protection device, because
New flashover protector upper end has ball discharge gap to form external insulation with circuit, is not involved in circuit operation at ordinary times and does not penetrate leakage electricity
Stream stream arc protection device body, improves arc protection device service life；When arc protection device threshold value overvoltage in circuit, dodge
On network protector, ball-gap discharge passes through capacitive absorption, then by the upper and lower resistance of electric capacity and discharge coil electric discharge, reduces thunder and lightning wave head,
Moment vises insulator thunder and lightning position, and insulator is clamped in the voltage range of not flashover；Arc protection device flexibly configurable is struck by lightning
Discharge counter and thunder and lightning remote supervision system, are easy to the lightning protection observing circuit thunderbolt situation and inspection arc protection device
Energy.Circuit lightning stroke flashover protector ball discharge gap is fixed, and will not cause discharge dispersity because of blowing and raining conductor galloping；Construction letter
Single feasible.Arc protection device is slicing principle, and radius of protection is more than the protector of zinc oxide series.
The insulating properties of local strengthening insulated conductor have raising line insulation level, non-maintaining advantage.
The flashover path increasing insulator has application conveniently, and anti-pollution ability is strong, has one to improving line lightning resisting level
Fixed effect, cost of investment is low, non-maintaining advantage.
Portable protective gaps carry out over-voltage can be elongated electric arc, make the advantage that line voltage is unable to pilot arc burning.
Zinc oxide overvoltage protection device can extend spark gap life-span advantage.
And by strengthening the tour to line insulator, periodically search and had occurred and that lightning stroke flashover or injured porcelain
Bottle, finds that porcelain vase rupture, enamel burn are changed in time；The general bar adopting 2 suspension type XP-4.5 insulators for strain rod tower
Tower, when safe distance over the ground allows, drainage thread is connected downwards, when mesophase drainage thread cannot connect downwards, can be using big
The Hard link of radian or the ceramic cross-arm support connection using large distance, improve dielectric level；Straight line pole selects the exhausted of large distance
Edge, such as：Ceramic cross arm insulator, improves the flashover voltage of insulator, when heightening the flashover voltage of the insulator it is necessary in distribution
Before transformation, cable, switch, transformer, continuous five foundation shaft towers install the protection of clamper protector additional.
In addition to above preferred embodiment, the present invention also has other embodiments, and those skilled in the art can be according to this
Invention is variously modified and deforms, and without departing from the spirit of the present invention, all should belong to claims of the present invention and be determined
The scope of justice.
Claims (5)
1. line located lightning protection administering method it is characterised in that：Comprise the following steps successively：
A) collection of data：Statistics collection is carried out to the line parameter circuit value of transmission line of electricity, and line parameter circuit value includes line corridor thunder and lightning ginseng
Number and line characteristics parameter, line corridor lightning parameter is the thunder and lightning data running accumulation based on lightning monitoring system, with grid
Form line corridor is divided, count, analyze and obtain and can reflect this line corridor different time, zones of different thunder and lightning
The CG lightning density of active characteristics, the lightning parameter of amplitude of lightning current cumulative probability distribution, it is basic that line characteristics parameter includes circuit
Information, tower structure and insulation, corridor topography and geomorphology, corridor topography and geomorphology includes flat type, mountain top type, mountain valley-type and hillside
Type；
B) overhead line structures lightning protection calculation：By the thunder and lightning to shaft tower in step a) mesorelief for the EGM model height fitting analysis method
Rich hit probability and be respectively calculated, and computation structure is respectively：The shielding arc of flat type landform is parallel with domatic, hillside type landform
Shaft tower under hillside side wire exposure arc increase, and the exposure arc of steep side wire reduce, the shaft tower two of mountain top type landform
The exposure arc of side wire all increases, and the exposure arc of the middle shaft tower both sides wire of mountain valley-type landform all reduces；
C) risk assessment：The data check transmission line of electricity corridor along the line lightening activity data over the years collected according to step a), shape
Become the lightening activity density map of transmission line of electricity, the easy minefield to transmission line of electricity and easily hit section and carry out statistical analysiss；
D) thunderbolt species is collected：Had mercy on according to the thunder and lightning that step b) calculates and hit the risk evaluation result collection that probability and step c) calculate
Lightning discharge causes type and the lightening hazard of circuit Lightning Over-voltage；
E) analyze cause of lightning stroke：The type of the circuit Lightning Over-voltage collected according to step d) and lightening hazard analysis thunderbolt are former
Cause；
F) administering method is proposed：Lightning protection measures are proposed according to the cause of lightning stroke that step e) analyzes.
2. line located lightning protection administering method according to claim 1 it is characterised in that：Thunderbolt species in step d)
Connect sudden strain of a muscle device thunderbolt including the building near thunderbolt circuit：When building connects sudden strain of a muscle device and is struck by lightning, thunder and lightning moment will produce
The strong LEMP of life, LEMP is used as transmission medium by air, is directly coupled on circuit, works as coupling
Induced potential when exceeding insulator resistance to thunder level, insulator can occur flashover, big to 10kV and below 0.4kV harm to the system；
Wire in thunderbolt：When wire is struck by lightning, may result in line tripping, porcelain vase to play fried, wire and blow, to distribution line, defeated
Electric line, to exceed line ball road, extra high voltage line harm big；
Thunderbolt shaft tower top：For 35kV and with electric pressure harm greatly, to 110kV and system above according to earth resistance size
Calculating grade harm whether unobstructed with lightning current release channel；
Near thunderbolt circuit greatly：Thunder and lightning moment is made producing strong LEMP, LEMP by air
For transmission medium, it is directly coupled on circuit, when the induced potential of coupling exceedes insulator resistance to thunder level, insulator can occur
Flashover is big to 10kV and below 0.4kV harm to the system；
Be struck by lightning powered thundercloud electrostatic induction or electric field induction on wire：Cause electrostatic induction, to 35kV and following harm to the system
Greatly.
3. line located lightning protection administering method according to claim 1 it is characterised in that：Lightening hazard bag in step d)
Include that porcelain vase bursts, conductor cord disconnection, circuit are short-circuited on earth fault and circuit and form the very high lightning wave of amplitude and cause equipment
Insulation damages and power outage.
4. line located lightning protection administering method according to claim 1 it is characterised in that：Cause of lightning stroke in step e)
Play fried porcelain vase and blow bare conductor analysis and insulated conductor breakage caused by lightning stroke mechanism including the process analyses of transmission line caused by lightning strike, thunderbolt
Analysis.
5. line located lightning protection administering method according to claim 1 it is characterised in that：Lightning protection measures in step f)
Including the insulating properties of local strengthening insulated conductor, wiring lightning stroke flashover protector, the flashover path increasing insulator, protection
Over-voltage and installing zinc oxide overvoltage protection device are come in gap.
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| CN106910030A (en) * | 2017-03-16 | 2017-06-30 | 武汉水院电气有限责任公司 | Distribution line damage to crops caused by thunder risk evaluating system based on compartmentalization |
| CN107045669A (en) * | 2017-03-16 | 2017-08-15 | 武汉水院电气有限责任公司 | Distribution line damage to crops caused by thunder methods of risk assessment based on compartmentalization |
| CN108869202A (en) * | 2018-07-09 | 2018-11-23 | 安徽诚意电气科技有限公司 | A kind of lightning rod erection transplantation method for mountain area |
| CN109064057A (en) * | 2018-09-05 | 2018-12-21 | 国网湖北省电力有限公司电力科学研究院 | A kind of methods of risk assessment of distribution line lightning parameter relative value |
| CN109508852A (en) * | 2018-09-18 | 2019-03-22 | 武汉水院电气有限责任公司 | A kind of distribution line damage to crops caused by thunder methods of risk assessment based on line corridor |
| CN110110988A (en) * | 2019-04-29 | 2019-08-09 | 国网经济技术研究院有限公司 | Technological transformation project integrated evaluating method and system are administered in a kind of transmission line of electricity lightning protection |
| CN110137935A (en) * | 2019-06-04 | 2019-08-16 | 张安斌 | A kind of power grid lightning protection isolating device |
| CN110197048A (en) * | 2019-06-18 | 2019-09-03 | 国网山西省电力公司大同供电公司 | A kind of distribution line lightning protection measures configuration method based on electric field and damage to crops caused by thunder analysis |
| CN110222430A (en) * | 2019-06-11 | 2019-09-10 | 刘亚峰 | A kind of 10kV distribution line lightening arresting method |
| CN110377925A (en) * | 2019-04-18 | 2019-10-25 | 国网吉林省电力有限公司吉林供电公司 | Transmission line of electricity lightening hazard differentiated lightning protection remodeling method |
| CN111401728A (en) * | 2020-03-12 | 2020-07-10 | 国网湖南省电力有限公司 | Mountain area distribution line pole tower lightning protection detection method, system and medium based on terrain and landform classification |
| CN111817248A (en) * | 2020-06-05 | 2020-10-23 | 云南电网有限责任公司大理供电局 | Comprehensive lightning protection method for 35kV power transmission line |
| WO2021012777A1 (en) * | 2019-07-24 | 2021-01-28 | 国网湖南省电力有限公司 | Method for designing protective gap of lightning-protection section of lightning-protection and anti-icing flashover composite insulator |
| CN112417631A (en) * | 2020-12-01 | 2021-02-26 | 中国能源建设集团浙江省电力设计院有限公司 | Full-voltage-level power grid disaster prevention and resistance planning method |
| CN112803344A (en) * | 2021-01-06 | 2021-05-14 | 南方电网科学研究院有限责任公司 | Lightning protection configuration method for newly-built power distribution network |
| CN112821339A (en) * | 2021-01-06 | 2021-05-18 | 南方电网科学研究院有限责任公司 | Lightning protection measure transformation method for operating power distribution network |
| CN117791533A (en) * | 2023-12-29 | 2024-03-29 | 广东雷宁普电气检测技术有限公司 | Lightning protection system |
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| CN107045669A (en) * | 2017-03-16 | 2017-08-15 | 武汉水院电气有限责任公司 | Distribution line damage to crops caused by thunder methods of risk assessment based on compartmentalization |
| CN106910030A (en) * | 2017-03-16 | 2017-06-30 | 武汉水院电气有限责任公司 | Distribution line damage to crops caused by thunder risk evaluating system based on compartmentalization |
| CN107045669B (en) * | 2017-03-16 | 2020-10-02 | 武汉水院电气有限责任公司 | Distribution line lightning damage risk assessment method based on regionalization |
| CN106910030B (en) * | 2017-03-16 | 2023-08-18 | 武汉新电电气股份有限公司 | Regional distribution line lightning hazard risk assessment system |
| CN108869202A (en) * | 2018-07-09 | 2018-11-23 | 安徽诚意电气科技有限公司 | A kind of lightning rod erection transplantation method for mountain area |
| CN109064057B (en) * | 2018-09-05 | 2021-08-06 | 国网湖北省电力有限公司电力科学研究院 | Risk assessment method for lightning parameter relative value of distribution network line |
| CN109064057A (en) * | 2018-09-05 | 2018-12-21 | 国网湖北省电力有限公司电力科学研究院 | A kind of methods of risk assessment of distribution line lightning parameter relative value |
| CN109508852A (en) * | 2018-09-18 | 2019-03-22 | 武汉水院电气有限责任公司 | A kind of distribution line damage to crops caused by thunder methods of risk assessment based on line corridor |
| CN110377925A (en) * | 2019-04-18 | 2019-10-25 | 国网吉林省电力有限公司吉林供电公司 | Transmission line of electricity lightening hazard differentiated lightning protection remodeling method |
| CN110110988A (en) * | 2019-04-29 | 2019-08-09 | 国网经济技术研究院有限公司 | Technological transformation project integrated evaluating method and system are administered in a kind of transmission line of electricity lightning protection |
| CN110137935A (en) * | 2019-06-04 | 2019-08-16 | 张安斌 | A kind of power grid lightning protection isolating device |
| CN110222430A (en) * | 2019-06-11 | 2019-09-10 | 刘亚峰 | A kind of 10kV distribution line lightening arresting method |
| CN110197048A (en) * | 2019-06-18 | 2019-09-03 | 国网山西省电力公司大同供电公司 | A kind of distribution line lightning protection measures configuration method based on electric field and damage to crops caused by thunder analysis |
| CN110197048B (en) * | 2019-06-18 | 2022-12-13 | 国网山西省电力公司大同供电公司 | Distribution network line lightning protection measure configuration method based on electric field and lightning damage analysis |
| WO2021012777A1 (en) * | 2019-07-24 | 2021-01-28 | 国网湖南省电力有限公司 | Method for designing protective gap of lightning-protection section of lightning-protection and anti-icing flashover composite insulator |
| CN111401728B (en) * | 2020-03-12 | 2022-03-29 | 国网湖南省电力有限公司 | Mountain area distribution line pole tower lightning protection detection method, system and medium based on terrain and landform classification |
| CN111401728A (en) * | 2020-03-12 | 2020-07-10 | 国网湖南省电力有限公司 | Mountain area distribution line pole tower lightning protection detection method, system and medium based on terrain and landform classification |
| CN111817248A (en) * | 2020-06-05 | 2020-10-23 | 云南电网有限责任公司大理供电局 | Comprehensive lightning protection method for 35kV power transmission line |
| CN112417631A (en) * | 2020-12-01 | 2021-02-26 | 中国能源建设集团浙江省电力设计院有限公司 | Full-voltage-level power grid disaster prevention and resistance planning method |
| CN112417631B (en) * | 2020-12-01 | 2024-03-29 | 中国能源建设集团浙江省电力设计院有限公司 | Disaster prevention and resistance planning method for full-voltage-class power grid |
| CN112821339A (en) * | 2021-01-06 | 2021-05-18 | 南方电网科学研究院有限责任公司 | Lightning protection measure transformation method for operating power distribution network |
| CN112803344A (en) * | 2021-01-06 | 2021-05-14 | 南方电网科学研究院有限责任公司 | Lightning protection configuration method for newly-built power distribution network |
| CN112803344B (en) * | 2021-01-06 | 2022-10-28 | 南方电网科学研究院有限责任公司 | Lightning protection configuration method for newly-built power distribution network |
| CN112821339B (en) * | 2021-01-06 | 2022-12-06 | 南方电网科学研究院有限责任公司 | Lightning protection measure transformation method for operating power distribution network |
| CN117791533A (en) * | 2023-12-29 | 2024-03-29 | 广东雷宁普电气检测技术有限公司 | Lightning protection system |
| CN117791533B (en) * | 2023-12-29 | 2024-05-28 | 广东雷宁普电气检测技术有限公司 | Lightning protection system |
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