CN106099753A - The method of Transmission Line Design without lightning conducter of weight ice-covering area - Google Patents
The method of Transmission Line Design without lightning conducter of weight ice-covering area Download PDFInfo
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- CN106099753A CN106099753A CN201610640367.9A CN201610640367A CN106099753A CN 106099753 A CN106099753 A CN 106099753A CN 201610640367 A CN201610640367 A CN 201610640367A CN 106099753 A CN106099753 A CN 106099753A
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- ice
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- insulator
- transmission line
- lightning protection
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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
Abstract
The invention discloses a kind of method of Transmission Line Design without lightning conducter of heavy ice-covering area, including transformation shaft tower and lightning conducter；Obtain parameter and the historical data of transformation circuit；It is the anti-ice-flashover composite insulator with lightning protection function by the common replacing insulator of transformation circuit；The anti-ice-flashover composite insulator with lightning protection function is carried out simulation analysis and determines its external structure and insulator zinc oxide valve plate parameter；Carry out experimental test；Complete the Transmission Line Design without lightning conducter of weight ice-covering area.Present invention, avoiding icing lightning conducter broken string and cause line outage accident, and significantly reduce transmission line of electricity cost, it is simple to circuit and the construction and installation of shaft tower；Use and there is the anti-ice-flashover composite insulator of lightning protection function, this insulator both can lightning protection also can anti-ice-flashing, improve transmission line of electricity anti-ice calamity and damage to crops caused by thunder ability, it is ensured that circuit stable operation；And simple installation, it is not necessary to change shaft tower original structure, save lectotype selection and the spending of power grid construction.
Description
Technical field
Present invention relates particularly to a kind of method of Transmission Line Design without lightning conducter of heavy ice-covering area.
Background technology
Along with development and the raising of people's living standard of economic technology, electric energy has had become as people and has produced and in life
Indispensable secondary energy sources.Therefore, during the safe and stable operation of power system has had become as the weight of China's economic development it
Weight.
South is affected by factors such as meteorology and landform, powerline ice-covering easily occurs.Have between line conductor and ground absolutely
Edge is isolated, can be to use ice-melt in the way of high current after power failure；And lightning conducter and shaft tower are joined directly together and without running current,
The artificial deicing of the most employings, does not has effective de-icing method.Due to the currentless heat effect of lightning conducter, icing opposing leads is more
For seriously, in the case of re-covering ice, it is susceptible to line-outage contingency.Drop on wire after lightning conducter broken string, cause line tripping, draw
Play line outage, have a strong impact on the normal power supply of user.After line outage, because of wire no current heat effect, wire also can be aggravated
Icing, causes the more serious line-outage contingency of falling tower.
There is pertinent literature to propose, allow the mode that lightning-arrest line strap insulator is run；But, in the case of this kind, lightning-arrest circuit
Lightning protection properties is greatly reduced, and circuit cost increases therewith, difficulty of construction significantly increases.
Summary of the invention
It is an object of the invention to provide a kind of it can be avoided that weigh the lightning conducter icing of ice-covering area transmission line of electricity and cause
Line outage, effectively realize the method for Transmission Line Design without lightning conducter of heavy ice-covering area that power system safety and stability runs.
The method of Transmission Line Design without lightning conducter of this heavy ice-covering area that the present invention provides, comprises the steps:
S1. shaft tower and the lightning conducter of counterweight ice-covering area is transformed；
S2. the electric parameter of the improved transmission line of electricity of obtaining step S1, line ice coating parameter and historical data, line areas
Territory lightning parameter and historical data；
S3. it is the anti-ice-flashing synthesis with lightning protection function by the common replacing insulator of improved for step S1 transmission line of electricity
Insulator；
S4. the parameter obtained according to step S2, in the case of simulation analysis normal condition and icing, the tool changed in step S3
Have the anti-ice-flashover composite insulator of lightning protection function in the case of charging operation around Electric Field Distribution, gap arc power frequency blow-out energy
The energy of lightning protection section and residual voltage parameter under power, lightning impulse；
S5. according to the simulation analysis result of step S4, determine described in there is the anti-ice-flashover composite insulator of lightning protection function
External structure and the parameter of insulator zinc oxide valve plate；
S6. the anti-ice-flashover composite insulator with lightning protection function determined step S5 carries out experimental test；
S7. according to test result, step S4～S6 are repeated, until the anti-ice-flashover composite insulator with lightning protection function passes through
Test；Complete the Transmission Line Design without lightning conducter of weight ice-covering area.
Counterweight ice-covering area shaft tower and lightning conducter described in step S1 are transformed, and specifically include working line,
The steel frame construction above lightning conducter and the sub-cross-arm of wire insulation is removed on the basis of existing shaft tower；For building circuit, do not examining
Circuit design is carried out according to design standard under the conditions of considering lightning conducter.
The acquisition electric parameter of improved transmission line of electricity, line ice coating parameter and historical data, line described in step S2
Region, road lightning parameter and historical data, specifically include shaft tower height, earth resistance, tower head geometric arrangement, line span and absolutely
Edge level, wire division type, diameter of wire and D.C. resistance information, land lightning parameter is that amplitude of lightning current probability divides
Cloth, lightning current waveform and CG lightning density information.
The anti-ice-flashover composite insulator with lightning protection function described in step S3, for number of patent application be
The anti-ice-flashover composite insulator with lightning protection function described in ZL201010171556.9
Simulation analysis described in step S4, is specially employing finite element analysis and Mayr Arc Modelling carries out Electric Field Distribution and imitates
True analysis and gap arc power frequency arc-rupturing capacity simulation analysis；And use electromagnetic transient analysis to lightning protection section under lightning impulse
Energy and residual voltage parameter carry out simulation analysis.
There is described in determination described in step S5 the external structure of the anti-ice-flashover composite insulator of lightning protection function, specially root
According to the simulation analysis result described in step S4, determine the anti-ice-flashing with lightning protection function in conjunction with insulator and spark gap design discipline
The external structure of composite insulator.
Described determination has the external structure of the anti-ice-flashover composite insulator of lightning protection function, is specially at specified operation electricity
Pressure, by re-covering ice, the Electric Field Simulation of heavy pollution insulator, obtains maximum field value and the Electric Field Distribution on the surface of insulator
Curve；Then, under conditions of ensureing that insulator maximum field value is less than 10 less than 17kV/cm and electric field distortion coefficient, carry out absolutely
The design revision of edge external structure, revision parameter include insulating segment and lightning protection section ratio distribution, grading ring position and size,
Insulator cluster parachute size and cluster parachute spacing；Meanwhile, use Mayr Arc Modelling to insulating segment uniform ring gap arc power frequency blow-out
Ability is analyzed, and must extinguish and without phenomenon of restriking as standard with gap arc when power frequency arc electric current zero passage for the first time,
Determine insulator dielectric section grading ring clearance distance.
The parameter of described determination insulator zinc oxide valve plate, be specially determined by there is the anti-ice-flashing of lightning protection function
Under the conditions of the external structure form of composite insulator, analyze under amplitude 200kA, waveform parameter 2.6/50 μ s lightning current effect,
The through-flow energy of the zinc oxide valve plate of insulator lightning protection section and residual voltage design parameter.
The through-flow energy of the zinc oxide valve plate of described determination insulator lightning protection section and residual voltage design parameter, be specially and ensure
Under 200kA direct lightning strike, lightning protection section zinc oxide valve plate is without damaging；To ensure under 200kA direct lightning strike, lightning protection section residual voltage value simultaneously
Less than lightning protection section composite sheath lightning impulse flashover voltage.
The through-flow energy of the zinc oxide valve plate of described determination insulator lightning protection section and residual voltage design parameter, specifically by
The dimensional structure of zinc oxide valve plate, formulation ratio and sintering process determine.
Experimental test described in step S6 includes power-frequency voltage test, surge voltage test, lightning current shock-testing, power frequency
Afterflow test, tensile test, degradation, Electric Field Distribution are measured and ice-coating test experimental test.
The method of Transmission Line Design without lightning conducter of this heavy ice-covering area that the present invention provides, it is to avoid icing lightning conducter
Break and cause line outage accident, and significantly reduce transmission line of electricity cost, it is simple to circuit and the construction and installation of shaft tower；Adopt
With having the anti-ice-flashover composite insulator of lightning protection function, this insulator both can lightning protection also can anti-ice-flashing, improve transmission line of electricity and resist
Ice damage and damage to crops caused by thunder ability, it is ensured that circuit stable operation；And simple installation, it is not necessary to change shaft tower original structure, save lectotype selection
Spending with power grid construction.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the present invention.
Detailed description of the invention
It is illustrated in figure 1 the method flow diagram of the present invention: this heavy ice-covering area that the present invention provides defeated without lightning conducter
Electric line method for designing, comprises the steps:
S1. shaft tower and the lightning conducter of counterweight ice-covering area is transformed, and specifically includes working line, at existing shaft tower
On the basis of remove the steel frame construction above lightning conducter and the sub-cross-arm of wire insulation；For building circuit, do not considering lightning conducter
Under the conditions of carry out circuit design according to design standard；Design standard is referred to GB 50545-2010, and " 110kV～750kV makes somebody a mere figurehead
Transmission Line Design specification "；
S2. the electric parameter of the improved transmission line of electricity of obtaining step S1, line ice coating parameter and historical data, line areas
Territory lightning parameter and historical data；Specifically include shaft tower height, earth resistance, tower head geometric arrangement, line span and insulation water
Flat, wire division type, diameter of wire and D.C. resistance information, land lightning parameter be amplitude of lightning current probability distribution,
Lightning current waveform and CG lightning density information；
As a example by Hunan area, Hunan area ice damage is the most relative with damage to crops caused by thunder serious, and amplitude of lightning current distribution function uses lake
Being evenly distributed of south area lightning location system 2010-2015 statistics:
In formula, I represents amplitude of lightning current first, kA.Wherein having detected maximum lightning current is 190kA.
Lightning current waveform uses double index power supply equivalence, and its expression formula is:
I=(I/ η) (e-t/α-e-t/β)
In formula, I is amplitude of lightning current, kA；A is wave rear attenuation quotient；β is wavefront attenuation quotient, and η is repairing of current peak
Positive coefficient, η=0.966.Lightning current waveform selects the standard lightning wave of 2.6/50 μ s, and corresponding time constant is a=
0.0000636, β=0.00000113.CG lightning density, uses lightning location system to measure the flat of 2010-2015 Hunan area
All 2.56 times/km of CG lightning density2/ year；
S3. it is that number of patent application is by the common replacing insulator of improved for step S1 transmission line of electricity
The anti-ice-flashover composite insulator with lightning protection function described in ZL201010171556.9；This insulator both can also can be prevented in lightning protection
Ice dodges, and answers simple installation, it is not necessary to change shaft tower original structure；
S4. the parameter obtained according to step S2, in the case of simulation analysis normal condition and icing, the tool changed in step S3
Have the anti-ice-flashover composite insulator of lightning protection function in the case of charging operation around Electric Field Distribution, gap arc power frequency blow-out energy
The energy of lightning protection section and residual voltage parameter under power, lightning impulse；
Finite element analysis and Mayr Arc Modelling is used to carry out Electric Field Distribution simulation analysis and gap arc power frequency blow-out energy
Power simulation analysis；Use electromagnetic transient analysis that energy and the residual voltage parameter of lightning protection section under lightning impulse are carried out simulation analysis；
S5. according to the simulation analysis result of step S4, determine described in there is the anti-ice-flashover composite insulator of lightning protection function
External structure and the parameter of insulator zinc oxide valve plate；
According to simulation analysis result, in conjunction with insulator and spark gap design discipline, determine the anti-ice-flashing with lightning protection function
The external structure of composite insulator；Being specially under rating operating voltage, by re-covering ice, (ice covering thickness takes 5～15mm, ice
Relative dielectric constant takes 50～100), heavy pollution (filthy thickness takes 0.2～5mm, and filthy relative dielectric constant takes 10～30)
The Electric Field Simulation of insulator, obtains maximum field value and the Electric Field Distribution curve on the surface of insulator；Then insulator is being ensured
Maximum field value less than 17kV/cm and electric field distortion coefficient (electric field distortion coefficient be insulator dielectric section maximum field intensity with
The ratio of insulating segment field minimum intensity) less than under conditions of 10, carry out the design revision of exterior insulator structure, revise parameter
Ratio distribution, grading ring position and size, insulator cluster parachute size and cluster parachute spacing including insulating segment with lightning protection section；Meanwhile,
Mayr Arc Modelling is used to be analyzed, insulating segment uniform ring gap arc power frequency arc-rupturing capacity with gap arc in power frequency electric
Must extinguish during arc current for the first time zero passage and be standard without phenomenon of restriking, determine insulator dielectric section grading ring clearance distance；
Determine the parameter of insulator zinc oxide valve plate, be specially determined by there is the anti-ice-flashing synthesis of lightning protection function absolutely
Under the conditions of the external structure form of edge, analyze amplitude 200kA, waveform parameter 2.6/50 μ s the direct lightning strike function of current under,
Lightning protection section zinc oxide valve plate is without damaging；Ensureing under 200kA direct lightning strike, lightning protection section residual voltage value is less than lightning protection section composite sheath simultaneously
Lightning impulse flashover voltage；On the premise of above-mentioned, by adjusting the dimensional structure of zinc oxide valve plate, formulation ratio and agglomerant
Skill determines through-flow energy and the residual voltage design parameter of the zinc oxide valve plate of insulator lightning protection section.
S6. the anti-ice-flashover composite insulator with lightning protection function determined step S5 carries out experimental test；Experimental test
Including power-frequency voltage test, surge voltage test, lightning current shock-testing, power frequency continued flow test, tensile test, degradation,
The experimental tests such as Electric Field Distribution measurement, ice-coating test；Reference test standard is: " transmission line of alternation current is with multiple for DL/T 815-2012
Close overcoat metal oxide arrester ", JB/T 12064-2014 " high altitude environment covering ice for insulator (snow) manual simulation side
Method ", GB/T19519-2004 " nominal voltage be higher than the exchange overhead transmission line compound inslation sub-definite of 1000V, test side
Method and acceptance criteria ", GB/T 16927.1-1997 " high-voltage test techniques Part I, ordinary test require ", GB/T
" 775.1-2006 insulator test method part 1: ordinary test method ", GB/T 775.2-2003 " insulator test method
Part 2: electrical test method ", GB/T 775.3-2006 " insulator test method third portion: mechanical test method ", IEC
61109-2008 " overhead transmission line with insulator nominal voltage more than the exchange overhead transmission line composite insulator of 1000V and strain insulator
Insulator definition, test method and acceptance criteria "；
S7. according to test result, step S4～S6 are repeated, until the anti-ice-flashover composite insulator with lightning protection function passes through
Test；Complete the Transmission Line Design without lightning conducter of weight ice-covering area.
Claims (11)
1. the method for Transmission Line Design without lightning conducter of weight ice-covering area, comprises the steps:
S1. shaft tower and the lightning conducter of counterweight ice-covering area is transformed；
S2. the electric parameter of the improved transmission line of electricity of obtaining step S1, line ice coating parameter and historical data, land thunder
Electrical quantity and historical data；
S3. it is the anti-ice-flashing composite insulation with lightning protection function by the common replacing insulator of improved for step S1 transmission line of electricity
Son；
S4. the parameter obtained according to step S2, in the case of simulation analysis normal condition and icing, having of changing in step S3 is anti-
The anti-ice-flashover composite insulator of thunder function in the case of charging operation around Electric Field Distribution, gap arc power frequency arc-rupturing capacity,
The energy of lightning protection section and residual voltage parameter under lightning impulse；
S5. according to the simulation analysis result of step S4, determine described in there is the outside of anti-ice-flashover composite insulator of lightning protection function
Structure and the parameter of insulator zinc oxide valve plate；
S6. the anti-ice-flashover composite insulator with lightning protection function determined step S5 carries out experimental test；
S7. according to test result, step S4～S6 are repeated, until there is the anti-ice-flashover composite insulator of lightning protection function by surveying
Examination；Complete the Transmission Line Design without lightning conducter of weight ice-covering area.
The method of Transmission Line Design without lightning conducter of heavy ice-covering area the most according to claim 1, it is characterised in that step
Counterweight ice-covering area shaft tower and lightning conducter described in S1 are transformed, and specifically include working line, at the base of existing shaft tower
The steel frame construction above lightning conducter and the sub-cross-arm of wire insulation is removed on plinth；For building circuit, do not considering lightning conducter condition
Lower carry out circuit design according to design standard.
The method of Transmission Line Design without lightning conducter of heavy ice-covering area the most according to claim 1, it is characterised in that step
The acquisition electric parameter of improved transmission line of electricity, line ice coating parameter and historical data described in S2, land thunder and lightning ginseng
Number and historical data, specifically include shaft tower height, earth resistance, tower head geometric arrangement, line span and dielectric level, wire and divide
Splitting type, diameter of wire and D.C. resistance information, land lightning parameter is amplitude of lightning current probability distribution, lightning current waveform
With CG lightning density information.
The method of Transmission Line Design without lightning conducter of heavy ice-covering area the most according to claim 1, it is characterised in that step
The anti-ice-flashover composite insulator with lightning protection function described in S3, is described in ZL201010171556.9 for number of patent application
There is the anti-ice-flashover composite insulator of lightning protection function.
5., according to the method for Transmission Line Design without lightning conducter of the heavy ice-covering area one of Claims 1 to 4 Suo Shu, its feature exists
In the simulation analysis described in step S4, it is specially and uses finite element analysis and Mayr Arc Modelling to carry out Electric Field Distribution simulation analysis
With gap arc power frequency arc-rupturing capacity simulation analysis；And use electromagnetic transient analysis method to the energy of lightning impulse and residual voltage
Parameter carries out simulation analysis.
6., according to the method for Transmission Line Design without lightning conducter of the heavy ice-covering area one of Claims 1 to 4 Suo Shu, its feature exists
In the external structure of the anti-ice-flashover composite insulator described in the determination described in step S5 with lightning protection function, it is specially according to step
Simulation analysis result described in S4, determines have the anti-ice-flashing synthesis of lightning protection function absolutely in conjunction with insulator and spark gap design discipline
The external structure of edge.
The method of Transmission Line Design without lightning conducter of heavy ice-covering area the most according to claim 6, it is characterised in that described
Determination there is the external structure of anti-ice-flashover composite insulator of lightning protection function, be specially under rating operating voltage, by weight
Icing, the Electric Field Simulation of heavy pollution insulator, obtain maximum field value and the Electric Field Distribution curve on the surface of insulator；Then exist
Under conditions of ensureing that insulator maximum field value is less than 10 less than 17kV/cm and electric field distortion coefficient, carry out exterior insulator knot
The design revision of structure, revision parameter includes ratio distribution, grading ring position and size, the insulator cluster parachute of insulating segment and lightning protection section
Size and cluster parachute spacing；Meanwhile, Mayr Arc Modelling is used insulating segment uniform ring gap arc power frequency arc-rupturing capacity to be carried out point
Analysis, must extinguish and without phenomenon of restriking as standard when power frequency arc electric current zero passage for the first time with gap arc, determine insulator
Insulating segment grading ring clearance distance.
8., according to the method for Transmission Line Design without lightning conducter of the heavy ice-covering area one of Claims 1 to 4 Suo Shu, its feature exists
In the parameter of described determination insulator zinc oxide valve plate, be specially determined by there is the anti-ice-flashing synthesis of lightning protection function absolutely
Under the conditions of the external structure form of edge, analyze under amplitude 200kA, the waveform parameter 2.6/50 μ s direct lightning strike function of current, really
Determine through-flow energy and the residual voltage design parameter of the zinc oxide valve plate of insulator lightning protection section.
The method of Transmission Line Design without lightning conducter of heavy ice-covering area the most according to claim 8, it is characterised in that described
The through-flow energy of zinc oxide valve plate of determination insulator lightning protection section and residual voltage design parameter, specially ensure to attack directly at 200kA
Under thunder, lightning protection section zinc oxide valve plate is without damaging；To ensure under 200kA direct lightning strike, lightning protection section residual voltage value is less than lightning protection section simultaneously
Composite sheath lightning impulse flashover voltage.
The method of Transmission Line Design without lightning conducter of heavy ice-covering area the most according to claim 9, it is characterised in that described
The through-flow energy of zinc oxide valve plate of determination insulator lightning protection section and residual voltage design parameter, specifically by zinc oxide valve plate
Dimensional structure, formulation ratio and sintering process determine.
11. according to the method for Transmission Line Design without lightning conducter of the heavy ice-covering area one of Claims 1 to 4 Suo Shu, its feature
It is that the experimental test described in step S6 includes power-frequency voltage test, surge voltage test, lightning current shock-testing, power frequency continued flow
Test, tensile test, degradation, Electric Field Distribution are measured and ice-coating test experimental test.
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| CN107656182A (en) * | 2017-11-15 | 2018-02-02 | 国网湖南省电力有限公司 | 220 KV transmission line insulator chain anti-ice-flashing check methods |
| CN107742853A (en) * | 2017-11-15 | 2018-02-27 | 国网湖南省电力有限公司 | 110 KV transmission line insulator chain anti-ice-flashing check methods |
| CN108963946A (en) * | 2018-06-25 | 2018-12-07 | 国网湖南省电力有限公司 | A kind of transmission line of electricity lightning protection and anti-icing equipment design method |
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| CN110146008A (en) * | 2019-05-16 | 2019-08-20 | 西安工程大学 | Based on the icing parameter of interdigital capacitor sensor and the monitoring method of state |
| CN110826243A (en) * | 2019-11-15 | 2020-02-21 | 国网湖南省电力有限公司 | Power communication design method for power transmission line capable of canceling ground wire in repeated ice-icing area |
| CN110826243B (en) * | 2019-11-15 | 2022-09-13 | 国网湖南省电力有限公司 | Power communication design method for power transmission line capable of canceling ground wire in repeated ice-icing area |
| CN111416301A (en) * | 2020-03-25 | 2020-07-14 | 浙江华云电力工程设计咨询有限公司 | Lightning protection installation method for overhead transmission line in medium and heavy ice area |
| CN111416301B (en) * | 2020-03-25 | 2021-08-10 | 浙江华云电力工程设计咨询有限公司 | Lightning protection installation method for overhead transmission line in medium and heavy ice area |
| CN111352007B (en) * | 2020-04-01 | 2022-03-22 | 国网安徽省电力有限公司电力科学研究院 | Comprehensive evaluation method for defects of basin-type insulator of ultra/extra-high voltage GIS equipment |
| CN111352007A (en) * | 2020-04-01 | 2020-06-30 | 国网安徽省电力有限公司电力科学研究院 | Comprehensive evaluation method for defects of basin-type insulator of ultra/extra-high voltage GIS equipment |
| CN111431129A (en) * | 2020-05-08 | 2020-07-17 | 湖南省湘电试研技术有限公司 | Transmission line without lightning conductor |
| WO2021223313A1 (en) * | 2020-05-08 | 2021-11-11 | 湖南省湘电试研技术有限公司 | Power transmission line without lightning shield line |
| CN113221375A (en) * | 2021-05-31 | 2021-08-06 | 山东建筑大学 | Electric power system simulation method considering line icing and insulator flashover |
| CN113221375B (en) * | 2021-05-31 | 2023-08-04 | 山东建筑大学 | Power system simulation method considering line icing and insulator flashover |
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