CN110298053A - A kind of calculation method of the transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod - Google Patents
A kind of calculation method of the transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod Download PDFInfo
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Abstract
The invention discloses a kind of calculation methods of transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod, the described method comprises the following steps: (1) collecting the practical electric parameter of transmission line of electricity, structural parameters and topography and geomorphology information；(2) for statistical analysis to the thunderbolt data of lightning location system monitoring；(3) material and structure of network analysis inductive type lightning rod；(4) it is based on COMSOL Multiphysics simulation software, simulation calculation obtains the capacitance parameter and inductance parameters of inductive type lightning rod, establishes the high frequency equivalent circuit model of inductive type lightning rod；(5) it is based on electro-magnetic transient numerical simulation program PSCAD/EMTDC, establishes accurate power transmission line lightning shielding over-voltage simulation analysis model, and the resistance to Lei Shuiping of computing electric power line；(6) data, computing electric power line tripping rate with lightning strike are obtained based on above-mentioned.As it can be seen that the present invention can carry out thunderbolt data statistics processing to single base shaft tower or more base shaft towers and tripping rate with lightning strike calculates, calculated result is accurate, high-efficient.
Description
Technical field
The present invention relates to data processing field and transmission line of electricity lightning protection fields, in particular to a kind of lightning-arrest based on inductive type
The calculation method of the transmission line lightning stroke trip-out rate of needle protection.
Background technique
Lightning stroke is the one of the major reasons for causing transmission line of electricity to trip, and lightening activity has obvious regional differences, Ying Gen
According to the lightening activity characteristic of different zones, considers the practical lightning parameter in the approach area of transmission line of electricity, take to adaptation to local conditions
Effective power grid lightning protection measures.The assessment and later period lightning protection of transmission line lightning stroke trip-out rate accurately calculated to its lightning protection grade
The development of retrofit work is of great significance.Traditional uses unified amplitude of lightning current probability-distribution function and regional CG lightning density
The calculation method of value is difficult to embody the movable otherness of power transmission line lightning shielding, and counting accuracy is lower.With lightning location system
Application on the transmission line, the tripping rate with lightning strike calculation method for embodying thunderbolt data variance become possibility, but thunderbolt number
Treatment process is relatively complicated according to statistics, lacks the lightning data statistical method being simple and efficient.
In recent years, inductive type lightning rod is novel to reach one kind of lightning protection effect can reduce amplitude of lightning current and steepness
Lightning protection thinking is of concern.Compared to conventional electrical power lines road lightning rod, drain into ground Lightning Protection, inductive type lightning rod be from
Source limitation lightning current is to reduce the overvoltage that lightning current is formed at insulator both ends.But there has been no consider thunderbolt data at present
The calculation method of the transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod of otherness.
Summary of the invention
To overcome deficiency existing for the prior art and method, the present invention provides a kind of based on the defeated of inductive type lightning rod protection
The calculation method of electric line tripping rate with lightning strike, concrete scheme are as follows:
S1: the practical electric parameter of transmission line of electricity, structural parameters and topography and geomorphology information are collected；
S2: and processing for statistical analysis to the thunderbolt data of the transmission line of electricity of lightning location system monitoring；
S3: the material parameter and structural parameters of network analysis inductive type lightning rod；
S4: being based on COMSOL Multiphysics finite element multiple physical field simulation software, and simulation calculation obtains inductive type and keeps away
The capacitance parameter and inductance parameters of thunder needle, and finally obtain the high frequency equivalent circuit model of inductive type lightning rod；
S5: being based on electro-magnetic transient numerical simulation program PSCAD/EMTDC, and it is imitative to establish accurate power transmission line lightning shielding overvoltage
True analysis model, and the resistance to Lei Shuiping of computing electric power line；
S6:, computing electric power line lightning stroke horizontal based on transmission line of electricity thunderbolt data derived above, topography and geomorphology and Nai Lei
Trip-out rate.
Preferably, in step S2, the statistical analysis of the thunderbolt data includes the following steps: with processing
S21: the transmission line of electricity nearly 3 years thunderbolt data excel files are exported from lightning location system；
S22: being read out excel file using the xlsread function provided in MATLAB, main calling form
For a=xlsread (' filename.xls')；
S23: being averaged by mean () function, and the summation of sum () function counts every base shaft tower nearly 3 years fifty-fifty
Dodge density and amplitude of lightning current probability distribution parameters；
S24: being fitted amplitude of lightning current probability distribution data using customized fitting function f=fittype (), from
The following formula of defined function expression formula:
P(I0(1+ (the I of)=1/0/a)b)
Wherein: I0For amplitude of lightning current, kA；P(I0) be amplitude of lightning current be more than I0Probability；A, b is parameter.
S25: gui interface is made using the tool box GUIDE, to shaft tower CG lightning density and amplitude of lightning current probability distribution parameters
It is exported.
Preferably, in step S4, the capacitance parameter of the inductive type lightning rod and the calculating process of inductance parameters include such as
Lower step:
S41: the Three-dimensional Axisymmetric model of inductive type lightning rod is established based on Auto CAD software；
S42: model is imported into COMSOL Multiphysics finite element multiple physical field simulation software, and selects electrostatic field；
S43: Definition Model material properties simultaneously apply edge load；
S44: relatively refinement subdivision processing is carried out to inductive type lightning rod coiler part, other parts are carried out at refinement subdivision
Reason；
S45: the turn-to-turn distribution capacity C of the every circle coil of inductive type lightning rod is calculatedd, distribution capacity C over the groundeWith inductance L.
Preferably, in step S5, the accurate power transmission line lightning shielding over-voltage simulation analysis model includes conducting wire, bar
Tower, insulator, lightning current, inductive type lightning rod model.
Preferably, in step S6, the computing electric power line tripping rate with lightning strike includes the following steps:
S61: determine input quantity be the nearly three annuals CG lightning density of every base shaft tower, it is amplitude of lightning current probability distribution parameters, resistance to
The arcing distance and topography and geomorphology of thunder level, insulator chain, output quantity are the tripping rate with lightning strike of every base shaft tower；
S62: the specific formula for calculation of the transmission line lightning stroke trip-out rate are as follows:
N=NLη(gP1+Psf)
NL=0.1Ng (28h0.6+b)
η=(4.5E0.75-14)×10-2
Wherein: N is lightning outage rate, secondary/(100km.a)；NLFor route thunderbolt number, secondary/(100km.a)；NgFor
CG lightning density, secondary/(km2.a)；H is shaft tower height, m；B is the distance between two ground wires, m；η is probability of sustained arc, and E is insulator
The virtual value of the average running voltage gradient of string, kV/m；liFor insulator chain length, m；G is to hit bar rate, and plains region takes 1/6,
Mountain area takes 1/4；P1Probability of flashover is struck back for route；PsfProbability of flashover is attacked directly for route.
S63: M function is defined in MATLAB according to the above function expression, and writes model calculation code；
S64: using the tool box GUIDE make gui interface, to electric power line pole tower tripping rate with lightning strike carry out batch calculate with
Output.
The present invention is had the following advantages and beneficial effects: compared with the prior art and method
(1) the present invention provides power transmission line lightning shielding data statistical approach, have write lightning data statistical model and processing
Interface, the model can carry out batch processing and output to the transmission line of electricity thunderbolt data that lightning location system monitors；
(2) the present invention provides the otherness of transmission line of electricity thunderbolt data is embodied in based on the protection of inductive type lightning rod
The calculation method of transmission line lightning stroke trip-out rate, and transmission line lightning stroke trip-out rate computation model and processing interface have been write, it can
Single shaft tower is calculated, more base shaft towers can also be calculated simultaneously；
(3) the present invention provides a kind of calculating sides of transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod
Method is right using electromagnetic transients program (PSCAD/EMTDC) and multiple physical field simulated program (COMSOL Multiphysics)
The resistance to thunder level of the high-frequency circuit equivalent parameters and transmission line of electricity of inductive type lightning rod is calculated, and writes thunderbolt based on MATLAB
The statistical model of data, the computation model of transmission line lightning stroke trip-out rate and corresponding operation interface, can criticize data
Amount processing and calculating, it is easy to operate, be conducive to improve based on the transmission line lightning stroke trip-out rate of inductive type lightning rod protection
Calculate precision and efficiency.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the flow diagram of transmission line of electricity thunderbolt data statistic analysis processing；
Fig. 3 is transmission line of electricity thunderbolt data processing interface；
Fig. 4 is the flow diagram that inductive type lightning rod high frequency equivalent circuit parameter calculates；
Fig. 5 is the flow diagram that transmission line lightning stroke trip-out rate calculates；
Fig. 6 is that transmission line lightning stroke trip-out rate calculates interface.
Specific embodiment
With reference to the accompanying drawing with specific implementation example, specific implementation process that the present invention is further explained, but reality of the invention
It is without being limited thereto to apply mode.
As shown in Figure 1, in the present embodiment, a kind of transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod
Calculation method includes the following steps:
S1: the practical electric parameter of transmission line of electricity, structural parameters and topography and geomorphology information are collected；
S2: and processing for statistical analysis to the transmission line of electricity thunderbolt data of lightning location system monitoring；
S3: the material parameter and structural parameters of network analysis inductive type lightning rod；
S4: COMSOL Multiphysics finite element multiple physical field simulation software, simulation calculation inductive type lightning rod are based on
Capacitance parameter and inductance parameters, and finally obtain the high frequency equivalent circuit model of inductive type lightning rod；
S5: being based on electro-magnetic transient numerical simulation program PSCAD/EMTDC, and it is imitative to establish accurate power transmission line lightning shielding overvoltage
True analysis model, and the resistance to Lei Shuiping of computing electric power line；
S6:, computing electric power line lightning stroke horizontal based on transmission line of electricity thunderbolt data derived above, topography and geomorphology and Nai Lei
Trip-out rate.
As shown in Fig. 2, the statistical analysis of the thunderbolt data includes the following steps: with processing in present application example
S21: the transmission line of electricity nearly 3 years thunderbolt data excel files are exported from lightning location system；
S22: being read out excel file using the xlsread function provided in MATLAB, main calling form
For a=xlsread (' filename.xls')；
S23: being averaged by mean () function, and the summation of sum () function counts every base shaft tower nearly 3 years fifty-fifty
Dodge density and amplitude of lightning current probability distribution parameters；
S24: being fitted amplitude of lightning current probability distribution data using customized fitting function f=fittype (), from
The following formula of defined function expression formula:
P(I0(1+ (the I of)=1/0/a)b)
Wherein: I0For amplitude of lightning current, kA；P(I0) be amplitude of lightning current be more than I0Probability；A, b is parameter.
S25: gui interface is made using the tool box GUIDE, to shaft tower CG lightning density and amplitude of lightning current probability-distribution function
It is exported.
As shown in figure 3, the present embodiment establishes thunderbolt data statistics model and processing circle based on the gui program of MATLAB
Face, the model can carry out batch processing to thunderbolt data, cumbersome artificial statistic processes are omitted.Thunderbolt data statistics model can
Realized simultaneously to the statistics of single shaft tower, more base shaft tower CG lightning densities and the fitting of amplitude of lightning current probability-distribution function, and
Final output CG lightning density statistical result and amplitude of lightning current probability distribution parameters.
As shown in figure 4, in present application example, the calculating of the capacitance parameter and inductance parameters of the inductive type lightning rod
Journey includes the following steps:
S41: the Three-dimensional Axisymmetric model of inductive type lightning rod is established based on Auto CAD software；
S42: model is imported into COMSOL Multiphysics finite element multiple physical field simulation software, and selects electrostatic field；
S43: Definition Model material properties simultaneously apply edge load；
S44: relatively refinement subdivision processing is carried out to inductive type lightning rod coiler part, other parts are carried out at refinement subdivision
Reason；
S45: the turn-to-turn distribution capacity C of the every circle coil of inductive type lightning rod is calculatedd, distribution capacity C over the groundeWith inductance L.
In the present embodiment, the accurate power transmission line lightning shielding over-voltage simulation analysis model include conducting wire, shaft tower, absolutely
Edge, lightning current, inductive type lightning rod model.
As shown in figure 5, the computing electric power line tripping rate with lightning strike includes the following steps: in present application example
S61: determine input quantity be the nearly three annuals CG lightning density of every base shaft tower, it is amplitude of lightning current probability-distribution function, resistance to
The arcing distance and topography and geomorphology of thunder level, insulator chain, output quantity are the tripping rate with lightning strike of every base shaft tower；
S62: the specific formula for calculation of the transmission line lightning stroke trip-out rate are as follows:
N=NLη(gP1+Psf)
NL=0.1Ng (28h0.6+b)
η=(4.5E0.75-14)×10-2
Wherein: N is lightning outage rate, secondary/(100km.a)；NLFor route thunderbolt number, secondary/(100km.a)；NgFor
CG lightning density, secondary/(km2.a)；H is shaft tower height, m；B is the distance between two ground wires, m；η is probability of sustained arc, and E is insulator
The virtual value of the average running voltage gradient of string, kV/m；liFor insulator chain length, m；G is to hit bar rate, and plains region takes 1/6,
Mountain area takes 1/4；P1Probability of flashover is struck back for route；PsfProbability of flashover is attacked directly for route.
S63: M function is defined in MATLAB according to the above function expression, and writes model calculation code；
S64: making gui interface using the tool box GUIDE, carries out batch calculating and output to shaft tower tripping rate with lightning strike.
As shown in fig. 6, the present embodiment establishes transmission line lightning stroke trip-out rate computation model based on the gui program of MATLAB
With processing interface, single shaft tower can be calculated, more base shaft towers can also be calculated.When calculating single shaft tower,
The above-mentioned CG lightning density being calculated, amplitude of lightning current probability distribution parameters, resistance to Lei Shuiping, landform need to be only inputted in input frame
Landforms are clicked and are calculated, i.e., exportable tripping rate with lightning strike calculated result.When calculating more base shaft towers, need every base in advance
The corresponding input quantity bulk storage of shaft tower is then introduced into file, is calculated, finally export calculated result in excel file.
Claims (5)
1. a kind of calculation method of the transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod, which is characterized in that including
Following steps:
S1: the practical electric parameter of transmission line of electricity, structural parameters and topography and geomorphology information are collected；
S2: the thunderbolt data of statistical analysis and the transmission line of electricity of processing lightning location system monitoring；
S3: the material and structure of network analysis inductive type lightning rod；
S4: being based on COMSOL Multiphysics finite element multiple physical field simulation software, and simulation calculation obtains inductive type lightning rod
Capacitance parameter and inductance parameters, and finally obtain the high frequency equivalent circuit model of inductive type lightning rod；
S5: being based on electro-magnetic transient numerical simulation program PSCAD/EMTDC, establishes accurate power transmission line lightning shielding over-voltage simulation point
Analyse model, and the resistance to Lei Shuiping of computing electric power line；
S6:, computing electric power line lightning stroke trip horizontal based on transmission line of electricity thunderbolt data obtained above, topography and geomorphology and Nai Lei
Rate.
2. a kind of calculating of transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod according to claim 1
Method, it is characterised in that in the step S2, statistical analysis and the processing of thunderbolt data include the following steps:
S21: the transmission line of electricity nearly 3 years thunderbolt data excel files are exported from lightning location system；
S22: being read out excel file using the xlsread function provided in MATLAB, and main calling form is a
=xlsread (' filename.xls')；
S23: being averaged by mean () function, and it is close to count the fifty-fifty sudden strain of a muscle in nearly 3 years of every base shaft tower for the summation of sum () function
Degree and amplitude of lightning current probability distribution parameters；
S24: being fitted amplitude of lightning current probability distribution parameters using customized fitting function f=fittype (), customized
The following formula of function expression:
P(I0(1+ (the I of)=1/0/a)b)
Wherein: I0For amplitude of lightning current, kA；P(I0) be amplitude of lightning current be more than I0Probability；A, b is parameter.
S25: gui interface is made using the tool box GUIDE, shaft tower CG lightning density and amplitude of lightning current probability distribution parameters are carried out
Output.
3. a kind of calculating of transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod according to claim 1
Method, it is characterised in that in the step S4, the capacitance parameter of inductive type lightning rod and the calculating process of inductance parameters include such as
Lower step:
S41: the Three-dimensional Axisymmetric model of inductive type lightning rod is established based on Auto CAD mapping software；
S42: model is imported into COMSOL Multiphysics finite element multiple physical field simulation software, and selects electrostatic field；
S43: Definition Model material properties simultaneously apply edge load；
S44: carrying out relatively refinement subdivision processing to inductive type lightning rod coiler part, carries out refinement subdivision processing to other parts；
S45: the turn-to-turn distribution capacity C of the every circle coil of inductive type lightning rod is calculatedd, distribution capacity C over the groundeWith inductance L.
4. a kind of calculating of transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod according to claim 1
Method, it is characterised in that in the step S5, accurate power transmission line lightning shielding over-voltage simulation analysis model includes conducting wire, bar
Tower, insulator, lightning current, inductive type lightning rod model.
5. a kind of calculating of transmission line lightning stroke trip-out rate based on the protection of inductive type lightning rod according to claim 1
Method, it is characterised in that in the step S6, the calculating of transmission line lightning stroke trip-out rate includes the following steps:
S61: determine that input quantity is the nearly three annuals CG lightning density of every base shaft tower, amplitude of lightning current probability distribution parameters, the water of resistance to thunder
Flat, insulator chain arcing distance and topography and geomorphology, output quantity are the tripping rate with lightning strike of every base shaft tower；
S62: the specific formula for calculation of the transmission line lightning stroke trip-out rate are as follows:
N=NLη(gP1+Psf)
NL=0.1Ng (28h0.6+b)
η=(4.5E0.75-14)×10-2
Wherein: N is lightning outage rate, secondary/(100km.a)；NLFor route thunderbolt number, secondary/(100km.a)；NgFor ground sudden strain of a muscle
Density, secondary/(km2.a)；H is shaft tower height, m；B is the distance between two ground wires, m；η is probability of sustained arc, and E is insulator chain
The virtual value of average running voltage gradient, kV/m；liFor insulator chain length, m；G is to hit bar rate, and plains region takes 1/6, mountain area
Take 1/4；P1Probability of flashover is struck back for route；PsfProbability of flashover is attacked directly for route.
S63: M function is defined in MATLAB according to the above function expression, and writes model calculation code；
S64: using the tool box GUIDE make gui interface, to electric power line pole tower tripping rate with lightning strike carry out batch calculate with it is defeated
Out.
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