CN106384966B - Line located lightning protection administering method - Google Patents
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- CN106384966B CN106384966B CN201610852671.XA CN201610852671A CN106384966B CN 106384966 B CN106384966 B CN 106384966B CN 201610852671 A CN201610852671 A CN 201610852671A CN 106384966 B CN106384966 B CN 106384966B
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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 present invention relates to line located lightning protection administering methods, successively include the following steps：Data collection, overhead line structures lightning protection calculation, risk assessment, lightning stroke type collect, analyze cause of lightning stroke and propose administering method；Advantages of the present invention：Pass sequentially through data collection, overhead line structures lightning protection calculation, risk assessment, type of being struck by lightning is collected, it analyzes cause of lightning stroke and proposes that the step method of administering method realizes the improvement of lightning protection, reach existing line to put prevention first, the principle of comprehensive treatment, carry out the work of overhead transmission line differentiated lightning protection comprehensively, realize different zones, different voltages grade, the configuration of the differentiation of different importance line lightning resisting levels and lightning protection measures, improve core backbone frame, strategic passway for transmitting electricity, the lightning protection of important load power supply line is horizontal, reduce power grid and equipment fault caused by damage to crops caused by thunder, ensure bulk power grid safe and reliable operation, reduce tripping rate with lightning strike and stroke-incidence rate.
Description
Technical field
The present invention relates to line located lightning protection administering methods.
Background technique
Overhead bare conductor road dielectric level is low, it is easy to cause insulator arc-over line-outage contingency, 10kV insulation by lightning stroke
Conducting wire is subject to lightning-caused breaking.According to the statistics of relevant information, Zhejiang area is until 2004, lightning-caused breaking accident and lightning stroke
Trip accident is just about 395 times：Since District of Shanghai uses insulated conductor, nearly hundred lightning stroke flashover faults have been had resulted in.It is external
There is data to introduce lightning-caused breaking accident and account for about 96.8% to be always struck by lightning, Japanese data shows that lightning-caused breaking accident accounts for about distribution
Net insulation fault obtains 36.8%.
The dielectric level of distribution line is usually relatively low, and not only direct lightning strike can cause damages, the overvoltage that inductive lightning generates
Also lightening hazard can be generated, moreover, the lightning protection measures that distribution line can be taken are very limited, generally cannot be lightning-arrest using setting up
The methods of line, coupling ground wire, only zinc oxide surge arresters are protected.But arrester is still only applicable to the inlet-outlet line of distribution line
The protection of side and controller switching equipment cannot largely install on power distribution network, if entire distribution line is respectively mounted arrester due to
Quantity is more, therefore necessarily leads at high cost, investment greatly, and operation and maintenance are difficult, and arrester itself will form newly again in damage
Fault point, influence the reliability service of power distribution network, thus the Lightning Protection of power distribution network be always influence power distribution network safe operation
Main problem.Transmission line of electricity is since the probability that the area such as mountain area to be passed through, rivers, Qiu Ling is struck by lightning is also very big, on route
Porcelain insulator used will appear " zero " and " bad value " insulator after longtime running, makes the reduction of its dielectric level, adds
Most of mountain area area pole tower ground resistance is higher, thus " to strike back " rate higher.Once occur " counterattack ", powerful lightning current with
Power current, which can beat insulator, to be fried, or even causes line-outage contingency.Now in order to which antifouling flashover composite insulator application amount is bigger,
But it is exactly that resistance to thunder level is low that composite insulator, which has a fatal defects, is easy that flashover occurs under lightning impulse.Silicon rubber synthesis
Insulator due to its Potential distribution unevenness is easier that lightning stroke flashover, in flashover, powerful lightning current and power frequency continued flow meeting occurs
Cause aluminum fitting scorification, aluminium-plated, sprays one layer of aluminium film on silicon rubber synthetic insulators surface, make insulator by permanent
It destroys.Line insulator is damaged in lightning stroke it is necessary to protect insulator in order to prevent, and best bet is excessively electric in thunder and lightning
When pressure is raw, lightning current and its subsequent power frequency continued flow are without flow through insulator surface, because if lightning current or power frequency continued flow stream
When crossing insulator surface, more or less can all insulator be made to be damaged, and due to being the insulation knot of solid and gas interface
Structure is influenced by pollution severity of insulators and the influence of electric field distortion is unfavorable for the extinguishing of electric arc, i.e. 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.
Summary of the invention
The technical problem to be solved in the present invention is to provide line located lightning protection administering methods, solve existing distribution wire Louis
The problem of by lightning stroke.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：Line located lightning protection is controlled
Reason method, successively includes the following steps：
A) data collection：Statistical 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 parameter and line characteristics parameter, line corridor lightning parameter are the thunder and lightning data based on lightning monitoring system operation accumulation, with
The form of grid divides line corridor, and the line corridor different time, different zones can be reflected by counting, analyzing and obtain
The lightning parameter that the CG lightning density of lightening activity feature, amplitude of lightning current cumulative probability are distributed, line characteristics parameter includes route
Essential information, tower structure and insulation, corridor topography and geomorphology, corridor topography and geomorphology include 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
Thunderbolt probability is respectively calculated, and is calculated structure and be respectively：The shielding arc of flat type landform is parallel with slope surface, hillside type
The exposure arc of hillside side conducting wire increases under the shaft tower of landform, and the exposure arc of steep side conducting wire reduces, the bar of mountain top type landform
The exposure arc of tower two sides conducting wire increases, and the exposure arc of the middle shaft tower two sides conducting wire of mountain valley-type landform reduces；
C) risk assessment：Corridor lightening activity number over the years along the data check transmission line of electricity collected according to step a)
According to forming the lightening activity density map of transmission line of electricity, it is for statistical analysis to the easy minefield of transmission line of electricity and easily to hit section；
D) lightning stroke type is collected：The risk evaluation result calculated according to step b) the thunderbolt probability calculated and step c)
Collect type and lightening hazard that lightning discharge causes route Lightning Over-voltage；
E) cause of lightning stroke is analyzed：According to the type of step d) the route Lightning Over-voltage collected and lightening hazard analysis lightning stroke
Reason；
F) administering method is proposed：Lightning protection measures are proposed according to the cause of lightning stroke of step e) analysis.
Preferably, the lightning stroke type in step d) includes that the building near lightning stroke route connects sudden strain of a muscle device lightning stroke：Work as building
When object connects sudden strain of a muscle device by being struck by lightning, thunder and lightning moment will generate strong lightning strike electromagnetic pulse, and lightning strike electromagnetic pulse passes through air and makees
It for transmission medium, is directly coupled on route, when the induced potential of coupling thunder level resistance to more than insulator, insulator can occur
Flashover is big to 10kV and 0.4kV or less harm to the system；
Conducting wire in lightning stroke：When conducting wire is by being struck by lightning, can lead to line tripping, porcelain vase is played fried, conducting wire and is blown, to matching cable
Road, transmission line of electricity endanger greatly more than crimping road, extra high voltage line；
Lightning stroke shaft tower top：It is big for 35kV and above harm, to 110kV and system above according to ground connection electricity
Hinder size and the whether unobstructed calculating grade harm of lightning current release channel；
It is struck by lightning near route greatly：Thunder and lightning moment will generate strong lightning strike electromagnetic pulse, and lightning strike electromagnetic pulse passes through sky
Gas is directly coupled on route as transmission medium, when the induced potential of coupling thunder level resistance to more than insulator, insulator meeting
Flashover occurs, it is big to 10kV and 0.4kV or less harm to the system；
In lightning stroke electrification thundercloud electrostatic induction or electric field induction to conducting wire：Cause electrostatic induction, to 35kV and following system
Harm is big.
Preferably, lightening hazard includes that porcelain vase is burst, short circuit grounding failure and line occur for conductor cord disconnection, route in step d)
Road formed the very high lightning wave of amplitude cause apparatus insulated damage and power outage, can according to lightening hazard to cause of lightning stroke into
Row analysis, to improve the efficiency of maintenance.
Preferably, the cause of lightning stroke in step e) includes the process analysis procedure analysis of transmission line caused by lightning strike, is struck by lightning and beats fried porcelain vase and burning
Disconnected bare conductor analysis and insulated conductor breakage caused by lightning stroke Analysis on Mechanism, are conducive to operator and select suitable lightning protection measures, can root
Optimal lightning protection effect is realized according to cause of lightning stroke.
Preferably, the lightning protection measures in step f) include the insulating properties of local strengthening insulated conductor, wiring lightning stroke sudden strain of a muscle
Network protector, flashover path, the portable protective gaps for increasing insulator come over-voltage and installing zinc oxide over-voltage protector, energy
Different lightning protection measures are selected according to different cause of lightning stroke, adapt to different occasions.
In conclusion advantages of the present invention：1. passing sequentially through data collection, overhead line structures lightning protection calculation, risk assessment, thunder
It hits type to collect, analyze cause of lightning stroke and propose that the step method of administering method realizes the improvement of lightning protection, has reached existing line
It puts prevention first, the principle of comprehensive treatment, carries out the work of overhead transmission line differentiated lightning protection comprehensively, realize different zones, difference
The differentiation configuration of voltage class, different importance line lightning resisting level and lightning protection measures improves core backbone frame, strategic
Passway for transmitting electricity, the lightning protection of important load power supply line are horizontal, reduce power grid and equipment fault caused by damage to crops caused by thunder, ensure bulk power grid peace
Full reliability service reduces tripping rate with lightning strike and stroke-incidence rate；
2. carrying out statistical collection by the line parameter circuit value to transmission line of electricity, can be joined according to the line corridor thunder and lightning of statistical collection
Several and line characteristics parameter determines the damage to crops caused by thunder high risk zone of transmission line of electricity and is analyzed comprehensively the problem of damage to crops caused by thunder occurs that energy is fast
The damage to crops caused by thunder factor for analyzing transmission line of electricity of speed, and according to the safeguard measure of line parameter circuit value formulation economical rationality；
3. the damage to crops caused by thunder risk height of different topography and geomorphologies and difference can be calculated not by overhead line structures lightning protection calculation
Greatly, and the arrester state of transmission line of electricity mulberry installation can be checked, examine its operating status, can be excluded due to arrester sheet
It dies and hinders and cause power grid ground fault and bring the widened security risk in failure face；
4. it is for statistical analysis that risk assessment is able to achieve to the easy minefield of transmission line of electricity and easily hits section, realize to transmission line of electricity
Region confirm degree of protection；
5. lightning stroke type collection is conducive to service personnel and analyzes transmission line of electricity the type being struck by lightning occur, be conducive to step thunder
The analysis of reason is hit, and the configuration of specific aim safeguard procedures can be proposed to transmission line of electricity according to cause of lightning stroke, and formulates more sets to have
Different characteristics Lightning Transformation scheme, and Economic evaluation is carried out, determine optimal lightning Protection measure.
Specific embodiment
Line located lightning protection administering method, successively includes the following steps：
A) data collection：Statistical 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 parameter and line characteristics parameter, line corridor lightning parameter are the thunder and lightning data based on lightning monitoring system operation accumulation, with
The form of grid divides line corridor, and the line corridor different time, different zones can be reflected by counting, analyzing and obtain
The lightning parameter that the CG lightning density of lightening activity feature, amplitude of lightning current cumulative probability are distributed, line characteristics parameter includes route
Essential information, tower structure and insulation, corridor topography and geomorphology, corridor topography and geomorphology include 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
Thunderbolt probability is respectively calculated, and is calculated structure and be respectively：The shielding arc of flat type landform is parallel with slope surface, hillside type
The exposure arc of hillside side conducting wire increases under the shaft tower of landform, and the exposure arc of steep side conducting wire reduces, the bar of mountain top type landform
The exposure arc of tower two sides conducting wire increases, and the exposure arc of the middle shaft tower two sides conducting wire of mountain valley-type landform reduces；
C) risk assessment：Corridor lightening activity number over the years along the data check transmission line of electricity collected according to step a)
According to forming the lightening activity density map of transmission line of electricity, it is for statistical analysis to the easy minefield of transmission line of electricity and easily to hit section；
D) lightning stroke type is collected：The risk evaluation result calculated according to step b) the thunderbolt probability calculated and step c)
Collect type and lightening hazard that lightning discharge causes route Lightning Over-voltage；
E) cause of lightning stroke is analyzed：According to the type of step d) the route Lightning Over-voltage collected and lightening hazard analysis lightning stroke
Reason；
F) administering method is proposed：Lightning protection measures are proposed according to the cause of lightning stroke of step e) analysis.
Case study existing for power distribution network lightning protection：
1. shaft tower problem：For being located at hill-side or mountain top, the shaft tower that shaft tower span is big, drop is big is by repeated and serious
Property lightning stroke centrostigma, the outside insulator chain of the shaft tower of big corner also easily occur lightning stroke flashover, thundercloud there may come a time when and route
Or shaft tower is parallel, lightning stroke even occurs in the lower section of route sometimes；In addition when shaft tower is located at mountain top, route one or both sides are sudden and violent
Dew, it is far at a distance from the earth, then lightning shielding effect failure of the earth to conducting wire is caused, shaft tower is in such complicated landform
Under landforms, considerably increases and hit bar rate；Route is when passing through mountains low-to-middle in height valley floor, hills valley plain simultaneously, basin and Plain
Interleaved state, it is influenced by mesoclimate bigger, the boundary location of different soils resistivity is easier that lightning stroke thing occurs
Therefore；For shaft tower by way of with a varied topography changeable, route takes double circuits on same tower road to set up, due to being symmetrically arranged, with famous prime minister geometric position one
Cause, dielectric level is also suitable so that the geometrical coupling ratio of each phase conductor differs greatly, and between parallel erected on same tower route geometry away from
Cause induced voltage higher from smaller, mutual induction and coupling, keeps line influence lightning voltage excessively high, in addition have around shaft tower
When pool, paddy field, when thundercloud is to ground discharge near route, by the heterocharge of lightning induction rapidly to lightning stroke in the earth
Point two sides are mobile, and the conductivity of water will be far longer than the conductivity of surrounding soil, so as to cause shaft tower when by being struck by lightning,
The induction lightening overvoltage generated in route leads to line tripping.Route approach mountain rock Soils In The Region resistivity is higher, causes bar
Tower grounding resistance of transmission is worth major reason that is exceeded, and causing distribution line lightening hazard to take place frequently, is sent out by field test
Existing, the soil resistivity around overhead line structures is in the 1500 Ω m of Ω m~2000, and universal higher, part pole tower ground resistance is also
2400 Ω m or so are reached, since soil resistivity is higher, the ground resistance of shaft tower have been caused to be extremely difficult to regulatory requirements, bar
When tower ground resistance height will cause shaft tower by being struck by lightning, shaft tower current potential is increased, frequent occurrence back flashover accident, to reduce
The resistance to thunder of route is horizontal.
2. the distance problem of overhead transmission line infall：Different voltages grade overhead line intersect when or distribution line and its
When his route (such as communication line) scissors crossing, if distance is smaller up and down, the air gap may be punctured by thunder and lightning, and
High and low pressure route 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, voltage magnitude easy to form is up to the induced overvoltage of 300~400kV, makes cross link while tripping
Failure, and cause the non-selective movement of relay protection, cause the expansion of systematic failures.If punctured in crosspoint, also
It will cause the controller switching equipment on the lower route of voltage, especially the electrical equipments such as neighbouring distribution transformer damaged, very
To causing human casualty accident.
Lightning stroke type in step d) includes that the building near lightning stroke route connects sudden strain of a muscle device lightning stroke：When building connects sudden strain of a muscle dress
When setting by being struck by lightning, thunder and lightning moment will generate strong lightning strike electromagnetic pulse, and lightning strike electromagnetic pulse is situated between by air as transmission
Matter is directly coupled on route, and when the induced potential of coupling thunder level resistance to more than insulator, flashover can occur for insulator, right
10kV and 0.4kV or less harm to the system is big；
Conducting wire in lightning stroke：When conducting wire is by being struck by lightning, can lead to line tripping, porcelain vase is played fried, conducting wire and is blown, to matching cable
Road, transmission line of electricity endanger greatly more than crimping road, extra high voltage line；
Lightning stroke shaft tower top：It is big for 35kV and above harm, to 110kV and system above according to ground connection electricity
Hinder size and the whether unobstructed calculating grade harm of lightning current release channel；
It is struck by lightning near route greatly：Thunder and lightning moment will generate strong lightning strike electromagnetic pulse, and lightning strike electromagnetic pulse passes through sky
Gas is directly coupled on route as transmission medium, when the induced potential of coupling thunder level resistance to more than insulator, insulator meeting
Flashover occurs, it is big to 10kV and 0.4kV or less harm to the system；
In lightning stroke electrification thundercloud electrostatic induction or electric field induction to conducting wire：Cause electrostatic induction, to 35kV and following system
Harm is big.
Lightening hazard includes that porcelain vase is burst, shape on short circuit grounding failure and route occurs for conductor cord disconnection, route in step d)
Apparatus insulated damage and power outage are caused at the very high lightning wave of amplitude, cause of lightning stroke can be divided according to lightening hazard
Analysis, to improve the efficiency of maintenance.
Measure the resistance to thunder level that line thunder protection performance superiority and inferiority important indicator includes lightning outage rate and route, route thunder
Hitting trip-out rate is annual (under conversion to 40 Thunderstorm Days) the line tripping number caused by being struck by lightning of per 100 km route, route
Resistance to thunder level is that can cause the maximum amplitude of lightning current of line insulator flashover when being struck by lightning route, the resistance to thunder level of route is higher,
Tripping rate with lightning strike will be lower, illustrates that the lightning protection properties of route are better.
Route trips because of lightning stroke must have two conditions：First is that the lightning surge generated when lightning stroke has been more than route
Dielectric level cause line insulation impulse flashover, but since the thunder and lightning duration only has tens microseconds, at this moment line switching is
Have little time to trip；Second is that impulse flashover then switchs to stable power frequency arc, be exactly for 10kV route form it is alternate short
Road just will lead to line tripping.
Short circuit grounding failure occurs for route：Although the action time of lightning surge is very short (tens of microseconds), conducting wire pair
After flashover occurs for ground (lightning conducter or shaft tower), power-frequency voltage will continue to discharge along this flashover channel, and then develop into power frequency
Arcing ground, 10kV route occurs to have no effect on the symmetrical of power supply when single-phase earthing, therefore at this moment route does not trip, and only sends out
Ground signalling out finds grounding point and simultaneously excludes ground fault for the time check route of operations staff O.5~2 hour.But such as
Fruit at this moment grounding point power frequency arc when go out when firing and will generate the very high arc grounding over-voltage of amplitude in system, cause low insulation
Horizontal electrical equipment damage, or because of at this moment lightning stroke again caused by the other phases ground connection of route to form phase fault, relay protection
Device will act at once makes line tripping, causes power outage.
Be struck by lightning route when can also form the very high lightning wave of amplitude on the line, when mine transmitting device is to substation, just
It can cause the complicated catadioptric ejected wave process of lightning wave in substation, bear Substation Electric Equipment insulation very high excessively electric
Pressure.Since the dielectric level of electrical equipment in substation is lower than the dielectric level of route, apparatus insulated damage is caused, is caused bigger
Power outage.
Cause of lightning stroke in step e) includes that the process analysis procedure analysis of transmission line caused by lightning strike, lightning stroke play fried porcelain vase and blow bare conductor
Analysis and insulated conductor breakage caused by lightning stroke Analysis on Mechanism are conducive to operator and select suitable lightning protection measures, can be former according to lightning stroke
Because realizing optimal lightning protection effect.
The process of transmission line caused by lightning strike includes the following three types situation：
1. near route when thunderbolt, on the electromagnetic induction to route that lightning strike electromagnetic pulse passes through space, leading to line voltage distribution
When being more than the impulse flashover voltage of insulator 50%, insulator will edge flashing cause to trip.Near route when thunderbolt, produce
Raw lightning strike electromagnetic pulse incudes on conducting wire, and usually three-phase generates simultaneously, and flashover forms arc short-circuit tripping to three-phase simultaneously；
2. route is struck by lightning by direct attack, porcelain vase is directly broken by lightning stroke or conducting wire is blown, the meeting of three phase isolated while flashover
Cause substation；
3. shaft tower top is by lightning stroke, earthing or grounding means is made because steel reinforced concrete pole is typically no, is all to utilize shaft tower
Natural grounding based on, electric current do not have release channel cause insulator reverse phase puncture flashover.
Lightning stroke plays fried porcelain vase and blows bare conductor analysis：It is generally smaller than forehand lightning current that negative polarity lightning current occurs, just
When 10%, the 10kV route that hitting property thunder and lightning is generally lightning strike density is struck by lightning by forehand, powerful lightning current and power current
Insulator can be beaten and be fried, or even cause line-outage contingency, when route is by negative polarity lightning current, cause tripping, insulator surface porcelain
Glaze is damaged, causes tripping more after upward lightning strikes, and downlink lightning stroke causes to play fried porcelain vase and line-outage contingency is more.
Insulated conductor breakage caused by lightning stroke Analysis on Mechanism：When insulated conductor is by being struck by lightning, lightning surge causes insulator arc-over,
And puncture the insulating layer of conducting wire, and the insulant near breakdown point, hindering electric arc moves along conductive line surfaces to two sides, thus
Electric arc can only be in breakdown point combustion, and the up to power frequency arc current convergence of kilo-ampere is on insulation breakdown point, and in breaker
Conducting wire is fused soon before tripping.
The factor for influencing 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 of generation；
Line insulation level and probability of sustained arc：When lightning stroke acts on insulator, the flashover of insulator depend on overvoltage value and
Line insulation is horizontal, along the working voltage average gradient E=U2/ √ 3L of flashover path；
L is flashover length (m), and U2 is rated line voltage；
Probability of sustained arc is the reduction with E and reduces, by the data analysis to arc spark discharge process it is concluded that,
When E≤7~10kV/m, probability of sustained arc zero.
The heat that power frequency short circuit current and thunder and lightning generate：Cause the heat and arc time of electric arc fusing insulated conductor
Heat Q=I2RT related, that arc current generates, wherein：I is arc current, and R is arc resistance, and T is 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, short circuit current 1kA.Then
The heat for knowing that power frequency continued flow generates is calculated by above formula formula the heat generated than lightning current is 10000 times big.It can be seen that sense
Answering overvoltage is the inducement of lightning-caused breaking, and power frequency continued flow is then the determinant for 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, flashover path, the portable protective gaps for increasing insulator come over-voltage and installing zinc oxide over-voltage protector, can be according to not
Same cause of lightning stroke selects different lightning protection measures, adapts to different occasions.
Wiring lightning stroke flashover protector have integrated engineering expense be it is lower than zinc oxide over-voltage protector, it from
Band fitting, does not need to do down conductor and earthing pole；Service life is the 2 times or more of zinc oxide over-voltage protector, because
Novel flashover protector upper end has discharge ball gap and route to form external insulation, is usually not involved in route operation and does not penetrate leakage electricity
Stream flows an arc protection device ontology, improves arc protection device service life；When arc protection device threshold value overvoltage occurs in route, dodge
Ball-gap discharge reduces thunder and lightning wave head by capacitive absorption, then by capacitor resistance and discharge coil electric discharge up and down on network protector,
Moment vises insulator thunder and lightning position, by insulator pincers in the voltage range of not flashover；The lightning stroke of arc protection device flexibly configurable
Discharge counter and thunder and lightning remote supervision system, convenient for the lightning protection of observation route thunderbolt situation and inspection arc protection device
Energy.Route lightning stroke flashover protector discharge ball gap is fixed, and will not cause discharge dispersity because of blowing and raining conductor galloping；Construction letter
It is single feasible.Arc protection device is slicing principle, and radius of protection is greater than the protector of zinc oxide series.
The insulation performance of local strengthening insulated conductor, which has, improves line insulation level, non-maintaining advantage.
The flashover path for increasing insulator has application convenient, and anti-pollution ability is strong, has one to line lightning resisting level is improved
Fixed effect, cost of investment is low, non-maintaining advantage.
The advantages of portable protective gaps, which carry out over-voltage, to elongate electric arc, and network voltage is prevented to burn from pilot arc.
Zinc oxide over-voltage protector can extend the advantages of service life of arrester.
And by reinforcing the tour to line insulator, periodically searches and had occurred and that lightning stroke flashover or injured porcelain
Bottle, the rupture of discovery porcelain vase, enamel burn replacement in time；The bar of 2 suspension type XP-4.5 insulators is generally used for strain rod tower
Tower connects downwards drainage thread when safe distance over the ground allows, and when interphase drainage thread can not connect downwards, can be used big
The Hard link of radian is connected using the ceramic cross arm support of large distance, improves 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 the flashover voltage of the insulator is turned up, it is necessary in distribution
Continuous five foundation shaft tower installs the protection of clamper protector additional before transformation, cable, switch, mutual inductor.
In addition to above preferred embodiment, there are other embodiments of the invention, and those skilled in the art can be according to this
Invention makes various changes and modifications, and as long as it does not depart from the spirit of the invention, should belong to appended claims of the present invention and determines
The range of justice.
Claims (4)
1. line located lightning protection administering method, it is characterised in that：Successively include the following steps：
A) data collection：Statistical 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
Several and line characteristics parameter, line corridor lightning parameter is the thunder and lightning data based on lightning monitoring system operation accumulation, with grid
Form line corridor is divided, the line corridor different time, different zones thunder and lightning can be reflected by counting, analyzing and obtain
The lightning parameter that the CG lightning density of active characteristics, amplitude of lightning current cumulative probability are distributed, line characteristics parameter includes that route is basic
Information, tower structure and insulation, corridor topography and geomorphology, corridor topography and geomorphology include flat type, mountain top type, mountain valley-type and hillside
Type；
B) overhead line structures lightning protection calculation：By EGM model height fitting analysis method to the thunder and lightning of shaft tower in step a) mesorelief
Shielding probability is respectively calculated, and is calculated structure and be respectively：The shielding arc of flat type landform is parallel with slope surface, hillside type landform
Shaft tower under hillside side conducting wire exposure arc increase, and the exposure arc of steep side conducting wire reduce, the shaft tower two of mountain top type landform
The exposure arc of side conducting wire increases, and the exposure arc of the middle shaft tower two sides conducting wire of mountain valley-type landform reduces；
C) risk assessment：Corridor lightening activity data over the years, shape along the data check transmission line of electricity collected according to step a)
At the lightening activity density map of transmission line of electricity, easy minefield to transmission line of electricity and easily to hit section for statistical analysis；
D) lightning stroke type is collected：It is collected according to the risk evaluation result that step b) the thunderbolt probability calculated and step c) are calculated
Lightning discharge causes the type and lightening hazard of route Lightning Over-voltage；
E) cause of lightning stroke is analyzed：It is former according to the type of step d) the route Lightning Over-voltage collected and lightening hazard analysis lightning stroke
Cause；
F) administering method is proposed：Lightning protection measures are proposed according to the cause of lightning stroke of step e) analysis；
Lightning protection measures in step f) include the insulating properties of local strengthening insulated conductor, wiring lightning stroke flashover protector, increase
The flashover path of insulator, portable protective gaps is added to come over-voltage and installing zinc oxide over-voltage protector.
2. line located lightning protection administering method according to claim 1, it is characterised in that：Lightning stroke type in step d)
Including：Building near lightning stroke route, which connects, dodges device lightning stroke：When building, which connects, dodges device by being struck by lightning, thunder and lightning moment will be produced
Raw strong lightning strike electromagnetic pulse, lightning strike electromagnetic pulse, as transmission medium, are directly coupled on route by air, work as coupling
Induced potential when being more than the resistance to thunder level of insulator, flashover can occur for insulator, big to 10kV and 0.4kV or less harm to the system；
Conducting wire in lightning stroke：When conducting wire is by being struck by lightning, can lead to line tripping, porcelain vase is played fried, conducting wire and is blown, to distribution line, defeated
Electric line endangers greatly more than crimping road, extra high voltage line；
Lightning stroke shaft tower top：It is big for 35kV and above harm, it is big according to ground resistance to 110kV and system above
The whether unobstructed calculating grade harm of small and lightning current release channel；
It is struck by lightning near route greatly：Thunder and lightning moment will generate strong lightning strike electromagnetic pulse, and lightning strike electromagnetic pulse is made by air
It for transmission medium, is directly coupled on route, when the induced potential of coupling thunder level resistance to more than insulator, insulator can occur
Flashover is big to 10kV and 0.4kV or less harm to the system；
In lightning stroke electrification thundercloud electrostatic induction or electric field induction to conducting 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 packet in step d)
Include that porcelain vase is burst, conductor cord disconnection, route occur to form the very high lightning wave of amplitude on short circuit grounding failure and route 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)
Process analysis procedure analysis, lightning stroke including transmission line caused by lightning strike play fried porcelain vase and blow bare conductor analysis and insulated conductor breakage caused by lightning stroke mechanism
Analysis.
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| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN110444356B (en) * | 2019-07-24 | 2020-10-23 | 国网湖南省电力有限公司 | Lightning protection and anti-icing flashover composite insulator lightning protection section protection gap design method |
| 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 |
| CN111817248B (en) * | 2020-06-05 | 2021-09-28 | 云南电网有限责任公司大理供电局 | Comprehensive lightning protection method for 35kV power transmission line |
| 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 |
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| 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 |
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