CN106649946A - Simulation calculation method for power frequency phase parameters of power transmission line - Google Patents
Simulation calculation method for power frequency phase parameters of power transmission line Download PDFInfo
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- CN106649946A CN106649946A CN201610867244.9A CN201610867244A CN106649946A CN 106649946 A CN106649946 A CN 106649946A CN 201610867244 A CN201610867244 A CN 201610867244A CN 106649946 A CN106649946 A CN 106649946A
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- G06F30/20—Design optimisation, verification or simulation
Abstract
The invention discloses a simulation calculation method for power frequency phase parameters of a power transmission line. The simulation calculation method comprises the steps of obtaining power transmission line parameters and transmitting the power transmission line parameters to an ATP-EMTP simulation system; building an ATP-EMTP simulation model; setting the power transmission line parameters: setting related parameters of a power transmission line module in the ATP-EMTP simulation system according to the obtained basic parameters of the power transmission line, a ground wire and a power transmission tower, and soil resistivity along the power transmission line; and applying a source to an operation line; and calculating phase parameters of the power transmission line: calculating phase self-impedance, phase self-capacitance, phase mutual-capacitance and phase mutual-impedance in the phase parameters of the power transmission line by adopting a single-terminal method or a double-terminal method. According to the simulation calculation method, a mode of combining program simulation with formula calculation is adopted, so that simulation calculation is more accurate, efficient and convenient than formula calculation and is more accurate than approximate estimation; and electrostatic and electromagnetic interference of the operation line on a calculation line can be eliminated, so that test check is provided for field actual measurement.
Description
Technical field
The present invention relates to electric system simulation calculating field, and in particular to a kind of power transmission line power frequency phase parameter simulation calculation
Method.
Background technology
EMTP (Electro-Magnetic Transient Program) is for Electromagnetic Transient Analysis of Power System
Simulation software, is the electric power networks and the most widely used program of simulation of power electronic of power system high voltage appearance grade.
Obtain two class basic skills of power frequency phase parameter both at home and abroad at present, first kind method is mainly calculated by formula
Go out.Calculating method can be divided into two kinds again：It is a kind of situations such as be structure, material, the temperature environment according to aerial condutor specific
Parameter substitutes into item by item computing formula and obtains, and referred to as accurately calculates；Another is to look into that to take unit long from handbook or catalogue
The phase parameter of degree circuit, referred to as approximate calculation.Method for Accurate Calculation needs the parameter being known a priori by more, computing formula complexity.
Frequently with approximate calculation in engineering, the method have ignored the impact of the factors such as geographical environment, weather conditions, and its result of calculation has
Time error is larger.
Equations of The Second Kind be by transmission line of electricity frame it is logical after, the actual measurement acquirement circuit power frequency phase parameter in scene.During actual measurement,
Because working line has induced voltage and induced-current to measurement circuitry, test process is formed and is disturbed, have a strong impact on measurement
As a result accuracy.
The content of the invention
To solve the deficiency that prior art is present, the invention discloses a kind of power transmission line power frequency phase parameter simulation calculation side
Method, the present invention is a kind of power transmission line power frequency phase parameter emulated computation method based on ATP-EMTP.The method takes program
The mode in combination with formula is calculated is emulated, it is more accurate than formula to calculate efficiently convenient, it is more accurate than approximate estimation, while and can be existing
Field actual measurement provides test verification.So as to for relay protection setting calculation, Load flow calculation, fault localization, calculation of short-circuit current, network loss
Calculate and select power system operation mode etc. to provide reliable power transmission line power frequency phase parameter.
For achieving the above object, concrete scheme of the invention is as follows：
A kind of power transmission line power frequency phase parameter emulated computation method, including：
Acquisition transmission line of electricity, ground wire, the basic parameter of transmission tower and transmission line of electricity soil resistivity along the line, and will be upper
State parameter to transmit to ATP-EMTP analogue systems；
Build ATP-EMTP simulation models；
Transmission line parameter is arranged：According to the basic parameter, the transmission line of electricity edge that obtain transmission line of electricity, ground wire and transmission tower
The soil resistivity of line arranges the relevant parameter of the transmission line of electricity module in ATP-EMTP analogue systems；
Source is applied to working line；
The calculating of transmission line of electricity phase parameter：Using the phase in single-ended method or both-end method computing electric power line phase parameter from resistance
Anti-, phase self-capacitance, phase mutual impedance, phase mutual capacitance, in ATP-EMTP analogue systems, according to single-ended method or both-end method to be calculated
Phase conductor is opened a way, short circuit is arranged, and applies power supply, the voltage phasor and electric current phasor of simulation calculation phase conductor to be calculated, root
According to above-mentioned each phase parameter of measurement result computing electric power line.
Further, when building ATP-EMTP simulation models, according to transmission line of electricity soil resistivity along the line, transmission line of electricity frame
If mode, ground wire model and erection mode, four factors of transmission line of electricity phase sequence determine model of power transmission system waypoint, four factors
Be with relation, if four factors are simultaneously consistent, in a design segments；
Model of power transmission system is built：Lumped parameter mould in ATP-EMTP analogue systems may be selected to short distance transmission line of electricity
Type, to long distance transmission line the distributed parameter model in ATP-EMTP analogue systems need to be selected.
Further, when transmission line parameter is arranged, the parameter of setting includes the power transmission line in ATP-EMTP analogue systems
The parameter of Model modules and data modules in the module of road；
Transmission line of electricity type and corresponding feature are set in Model modules, soil resistivity, transmission line of electricity conveying frequency are set
Rate and transmission line length；
Data modules arrange transmission line of electricity phase number, internal diameter, external diameter, D.C. resistance, horizontal range Horiz, conductor height
Vtower, span centre drift height Vmid, heading spacing, ground wire shielding angle and division number.
Further, it is voltage source to apply signal source, and arranges amplitude, frequency, angle, the beginning and ending time of the voltage source.
Further, in the calculating of transmission line of electricity phase parameter, phase-splitter is set in transmission line of electricity terminal, by a three-phase
Transmission line of electricity is divided into three single-phase power transmission lines, realizes the induced voltage of circuit to be calculated and the split-phase detection of electric current.
Further, transmission line of electricity phase parameter detection when, probe current subject string is connected in into each single-phase power transmission line
Lu Zhong, by detecting voltage source and is connected in each single-phase power transmission line two ends of sensing, and probe current source shows the electric current for passing through
Amplitude and angle, detecting voltage source shows the voltage magnitude and angle of simultaneously wiring waypoint.
Further, transmission line of electricity phase self-impedance when emulating according to single-ended method, is specifically included in simulation calculation：
Phase conductor terminal open circuit to be calculated, head end are applied into single phase poaer supply, remaining phase two ends open circuit；
Simulation calculation measures phase head end voltage phasorElectric current phasor
Remaining holding is constant, by phase end to be calculated ground connection, the simulation calculation phase head end voltage phasorElectric current phasor
Emulation data analysis is calculated：According to EMTP simulation results, transmission line of electricity characteristic impedance and transmission line of electricity are obtained
Propagation coefficient, the transmission line of electricity simulation calculation phase unit self-impedance be transmission line of electricity characteristic impedance and transmission line of electricity propagation coefficient it
Product.
Further, transmission line of electricity phase self-impedance when emulating according to both-end method, is specifically included in simulation calculation：
Phase conductor head end to be calculated is applied into single phase poaer supply, end ground connection, remaining phase two ends open circuit；
The simulation calculation phase head end voltage phasorElectric current phasorAnd end current phasor
Emulation data analysis is calculated：According to EMTP simulation results, transmission line of electricity characteristic impedance and transmission line of electricity are obtained
Propagation coefficient, the transmission line of electricity simulation calculation phase unit self-impedance be transmission line of electricity characteristic impedance and transmission line of electricity propagation coefficient it
Product.
Further, transmission line of electricity phase self-capacitance when emulating according to single-ended method, is specifically included in simulation calculation：
Phase conductor terminal open circuit to be calculated, head end are applied into single phase poaer supply, remaining mutually keeps two-terminal-grounding；
Simulation calculation measures phase head end voltage phasorElectric current phasor
Remaining holding is constant, by phase end to be calculated ground connection, the simulation calculation phase head end voltage phasorElectric current phasor
Emulation data analysis is calculated：According to EMTP simulation results, transmission line of electricity characteristic impedance and transmission line of electricity are obtained
Propagation coefficient, the transmission line of electricity simulation calculation phase unit self-admittance be transmission line of electricity propagation coefficient and transmission line of electricity characteristic impedance it
Than phase unit self-capacitance is the ratio of the imaginary part with angular frequency of phase unit self-admittance.
Further, transmission line of electricity phase self-capacitance when emulating according to both-end method, is specifically included in simulation calculation：
Phase conductor head end to be calculated is applied into single phase poaer supply, terminal open circuit, remaining phase two-terminal-grounding；
Simulation calculation measures phase head end voltage phasorElectric current phasorAnd terminal voltage phasor
Emulation data analysis is calculated.According to EMTP simulation results, transmission line of electricity characteristic impedance and transmission line of electricity are obtained
Propagation coefficient, the transmission line of electricity simulation calculation phase unit self-admittance be transmission line of electricity propagation coefficient and transmission line of electricity characteristic impedance it
Than phase unit self-capacitance is the ratio of the imaginary part with angular frequency of phase unit self-admittance.
Further, the alternate mutual capacitance of transmission line of electricity when emulating according to single-ended method, is specifically included in simulation calculation：
A wherein phase transmission line of electricity head end to be calculated is applied into single phase poaer supply, terminal open circuit, remaining phase head end ground connection, end
End open circuit；
Simulation calculation applies power supply phase head end voltage phasorAnother phase head end electric current phasor
Emulation data analysis is calculated：According to EMTP simulation results, unit length is alternate mutually between the two-phase transmission line of electricity
Electric capacityUnit F/km, L is the transmission line of electricity line length, and unit is km, and ω is to apply power supply
Angular frequency, unit is radian per second.
Further, the alternate mutual capacitance of transmission line of electricity is in simulation calculation, when emulating according to both-end method, if transmission line of electricity
System is N phases, any i phases of simulation calculation and the alternate mutual capacitance c of jij, in EMTP simulated environment, specifically include：
I-th phase transmission line of electricity head end is applied into single phase poaer supply, terminal open circuit, remaining phase head end ground connection, terminal open circuit；
Simulation calculation i phase head end voltage phasorTerminal voltage phasorJ phase head end electric currentsWith terminal voltage
Same method applies power supply and emulation meter to transmission line of electricity in other the N phase transmission systems outside removing i phases in addition
Calculate；
Emulation data analysis is calculated：Bring EMTP simulation results into equation group
M ≠ j in formula, i take 1 to N-1, j
I+1 to N is taken, N phase conductors system can list altogether the 1+2+3+...+N-1 units equation containing 1+2+3+...+N-1 unknown number
Group, simultaneous solution goes out all alternate transadmittance Yij, and then obtain alternate mutual capacitance cij=Yij/(L·jω).In formulaObtain from above simulation calculation, zj、yjIt is phase unit self-impedance and the self-admittance of phase unit from above imitating
Really it is calculated, Yij、YjmIt is equation group variable to be solved for all alternate transadmittances, L is transmission line length.
Further, transmission line of electricity mutual impedance is specifically included in simulation calculation：
A wherein phase transmission line of electricity head end to be calculated is applied into single phase poaer supply, end ground connection, remaining phase head end open circuit, end
End ground connection；
Simulation calculation applies power supply phase head end electric current phasorRemaining sensing phase head end induced voltage phasor
Remaining mutual impedance carries out applying source and simulation calculation using above-mentioned same method；
Emulation data analysis is calculated：According to EMTP simulation results, to short distance transmission line of electricity, transmission line of electricity is alternate mutually
ImpedanceWherein L is transmission line length.
Further, transmission line of electricity mutual impedance is in simulation calculation, to long distance transmission line or to mutual impedance
When computational accuracy has high demands,Wherein k ≠ j, k ≠ i,
zi、yi、zj、yjj、yjkSimulation calculation is obtained in above phase unit self-impedance and phase unit self-admittance, zi、yiRespectively apply
The i phase conductor unit length impedances of power supply and admittance；zjTo apply the j phase conductor unit length impedances of power supply, yjjTo sense phase j
Phase unit length self-admittance, yjkIt is and other mutually alternate unit length transadmittances of sensing.
Further, span centre drift height Vmid=conductor height-sag.
Further, if the wire that continuous some grades of shaft towers are assumed is incorporated in into a design segments, in average span
Centre conductor height Vmid′：
Vmid'=weighted average conductor height-average sag
In the weighted average conductor height-design segments different conductor height with the percentage product shared by it plus and；
Average sag-corresponding sag of the average span of the design segments.
Further, horizontal range Horiz selectes first the horizontal range of a reference when arranging, if selecting shaft tower
Center line is 0 point of reference levels distance, if reference coordinate point left is negative, right is for just, transmission line of electricity is away from the absolute of the reference point
Spacing is d；
If transmission line of electricity is on the left of shaft tower, HorizTransmission line of electricity=-d；
If transmission line of electricity is on the right side of shaft tower, HorizTransmission line of electricity=d.
Beneficial effects of the present invention：
The emulated computation method of the power transmission line power frequency phase parameter of present invention research, it is adaptable to any transmission line of electricity.
Mode of the procedure simulation in combination with formula calculating is this invention takes, it is more accurate than formula to calculate efficiently convenient, than
Approximate estimation is accurate, while and can provide test verification for field measurement.So as to for relay protection setting calculation, Load flow calculation,
Fault localization, calculation of short-circuit current, line losses management and selection power system operation mode etc. provide reliable transmission line of electricity work
Frequency parameter.
Description of the drawings
The single-ended method phase self-impedance simulation calculation schematic diagrames of Fig. 1；
Fig. 2 both-end method phase self-impedance simulation calculation schematic diagrames；
The single-ended method phase self-capacitance simulation calculation schematic diagrames of Fig. 3；
Fig. 4 both-end method phase self-capacitance simulation calculation schematic diagrames；
The single-ended method phase mutual capacitance simulation calculation schematic diagrames of Fig. 5；
Fig. 6 both-end method phase mutual capacitance simulation calculation schematic diagrames；
Fig. 7 phase mutual impedance simulation calculation schematic diagrames；
Fig. 8 power transmission line power frequency phase parameter simulation calculation flow process figures
Specific embodiment：
Below in conjunction with the accompanying drawings the present invention is described in detail：
As shown in figure 8, a kind of power transmission line power frequency phase parameter emulated computation method, it is the step of specifically include：
1st, data acquisition
1) involved transmission line of electricity data is obtained, including transmission line of electricity model, internal diameter, external diameter, DC resistance, division
Number, heading spacing, sag, phase sequence.
2) involved ground wire data is obtained, including ground wire model, internal diameter, external diameter, D.C. resistance, sag, earthing mode,
Ground wire shielding angle.
3) obtain involved transmission tower data, including shaft tower model, exhale height, span, wire in shaft tower hitch point and
Parameter.
4) involved soil resistivity parameter is obtained.
2. data analysis is calculated
The above-mentioned data for getting are carried out into data analysis calculating according to following formula：
1)Vmid=conductor height-sag
Vmid- span centre drift height.
If 2) wire that continuous some grades of shaft towers are assumed is incorporated in into a design segments,：
Vmid'=weighted average conductor height-average sag
In the weighted average conductor height-design segments different conductor height with the percentage product shared by it plus and.
Average sag-corresponding sag of the average span of the design segments.
3) distance between common-tower double-return, multiple-loop line, the transmission line of electricity of parallel laying is to affect transmission line parameter
Key factor.It is Horiz parameter setting common-tower double-returns in LCC (transmission line of electricity module) in ATP-EMTP softwares in Model, same
Many times of tower, the distance of parallel laying circuit.The horizontal range of a reference is selected first, if it is reference to select arbitrary shaft tower center line
0 point of horizontal range, absolute spacing of the transmission line of electricity away from the reference point is d.If reference coordinate point left is negative, right is for just.
If transmission line of electricity is on the left of shaft tower, HorizTransmission line of electricity=-d
If transmission line of electricity is on the right side of shaft tower, HorizTransmission line of electricity=d
3rd, ATP-EMTP simulation models are built.
1) model of power transmission system design.According to transmission line of electricity soil resistivity along the line, electric transmission line erection mode, line style
Number and erection mode, four factors of transmission line of electricity phase sequence determine model of power transmission system waypoint.Four factors be with relation, if
Four factors are simultaneously consistent, then in a design segments.
2) model of power transmission system is built.The lumped parameter model in ATP-EMTP is may be selected to short distance transmission line of electricity, it is right
Long distance transmission line need to select the distributed parameter model in ATP-EMTP, by step 1) each section of transmission line of electricity designing,
Simulated with the model of power transmission system of selection in ATP-EMTP, and connected each section of transmission line of electricity according to transmission line of electricity phase sequence figure
Come.
3) transmission line parameter is arranged.The parameter that need to be arranged has in the LCC (transmission line of electricity module) in ATP-EMTP
Model, data module.The setting of this partial parameters is calculated according to above-mentioned 1 Data acquisition, and above-mentioned 2 data analysis, specifically
To arrange transmission line of electricity type and corresponding feature in Model modules, soil resistivity is set, transmission line of electricity frequency of delivery is defeated
Electric line length；Data modules arrange transmission line of electricity phase number, internal diameter, external diameter, D.C. resistance, horizontal range Horiz, conductor height
Vtower, span centre drift height Vmid, heading spacing, ground wire shielding angle, division number.
4) transmission line of electricity applies signal source setting.Select apply signal source be voltage source, and arrange the voltage source amplitude,
Frequency, angle, beginning and ending time.In general the amplitude of the signal source can arbitrarily be chosen on the premise of as bigger as possible.If
Simulation calculation amount guide field is surveyed, then the signal source maximum amplitude that needs inquiry agency to can be provided using test equipment,
And simulation calculation signal source is set to into the value.
5) simulation time step-length is arranged.The ATP-Settings under the ATP modules in ATP-EMTP is opened, emulation step is set
Long deltaT ＜ 1 × 10-3, simulation time Tmax>deltaT。
4.ATP-EMTP calculates debugging
1) ATP programs are run, whether accurately checks each section of transposition and phase sequence, if mistake, LCC (transmission lines of electricity are checked paragraph by paragraph
Module) phase sequence, and correct, till phase sequence is all consistent with design phase sequence.
2) due to transmission line of electricity per phase conductor dispatch from the factory operating mode, antenna height, transposition form, along thread environment etc. all not
Together, thus line parameter circuit value would also vary from, the voltage and electric current in simulation calculation needs split-phase to detect, therefore need to be in transmission line of electricity terminal
Phase-splitter is set, that is, selects Splitter (3phase) module in Probe＆3-phase, a three phase line is divided into
Three single-phase power transmission lines.
3) probe current subject string is connected in each single-phase power transmission line, by detecting voltage source and is connected in the every of sensing
Individual single-phase power transmission line two ends, double-click the content that probe current source setting probe current source shows, select Steady-state's
Curr/Power, selects the Curr.Ampl in Onscreen, then the probe current source shows the electricity for passing through after debugging is calculated and terminated
Stream amplitude and angle.The content that detecting voltage source setting detecting voltage source shows is double-clicked, selects Steady-state's
Voltage, selects the U in Onscreen, then the detecting voltage source shows the voltage amplitude of simultaneously wiring waypoint after debugging is calculated and terminated
Value and angle.
4) calculation is arranged.There are two kinds currently for comparative maturity in the method for testing of transmission line of electricity phase parameter, one
It is the single-ended method for being directed to short distance transmission line of electricity to plant, and another kind is the both-end method for long distance transmission line.Transmission line of electricity phase
Parameter includes phase self-impedance, phase self-capacitance, phase mutual impedance, phase mutual capacitance.Each parameter calculation arranges as follows：
A) transmission line of electricity phase self-impedance simulation calculation.
As shown in figure 1, when single-ended method is emulated, in EMTP simulated environment, step 1, to phase conductor terminal open circuit to be calculated,
Head end applies single phase poaer supply, remaining phase two ends open circuit.Step 2, simulation calculation measurement phase head end voltage phasorElectric current phasorStep 3, by phase end to be calculated ground connection, the simulation calculation phase head end voltage phasorElectric current phasorStep 4, emulation
Data analysis is calculated.According to EMTP simulation results, transmission line of electricity characteristic impedanceUnit is Ω, power transmission line
Road propagation coefficientUnit 1/km, wherein L are the transmission line of electricity line length, and unit is km, the transmission of electricity
It is z=z that circuit emulation calculates phase unit self-impedancecλ, unit Ω/km.
As shown in Fig. 2 when both-end method is emulated, in EMTP simulated environment, step 1 applies phase conductor head end to be calculated
Single phase poaer supply, end ground connection, remaining phase two ends open circuit.Step 2, the simulation calculation phase head end voltage phasorElectric current phasor
And end current phasorStep 3, emulation data analysis is calculated.According to EMTP simulation results, transmission line of electricity characteristic impedanceUnit is Ω, transmission line of electricity propagation coefficientUnit 1/km, wherein L are the transmission of electricity
Circuit line length, unit is km, and the transmission line of electricity simulation calculation phase unit self-impedance is z=zcλ, unit Ω/km.
B) transmission line of electricity phase self-capacitance simulation calculation.
As shown in figure 3, when single-ended method is emulated, in EMTP simulated environment, step 1, to phase conductor terminal open circuit to be calculated,
Head end applies single phase poaer supply, and remaining mutually keeps two-terminal-grounding.Step 2, simulation calculation measurement phase head end voltage phasorElectric current
PhasorStep 3, by phase end to be calculated ground connection, the simulation calculation phase head end voltage phasorElectric current phasorStep 4,
Emulation data analysis is calculated.According to EMTP simulation results, transmission line of electricity characteristic impedanceUnit is Ω, defeated
Electric line propagation coefficientUnit 1/km, wherein L are the transmission line of electricity line length, and unit is km, should
The self-admittance of transmission line of electricity simulation calculation phase unit is y0=λ/zc, unit S, unit length self-capacitance c0=Im (y0)/ω。
As shown in figure 4, when both-end method is emulated, in EMTP simulated environment, step 1 applies phase conductor head end to be calculated
Single phase poaer supply, terminal open circuit, remaining phase two-terminal-grounding.Step 2, simulation calculation measurement phase head end voltage phasorElectric current phasorAnd terminal voltage phasorStep 3, emulation data analysis is calculated.According to EMTP simulation results, the resistance of transmission line of electricity feature
It is anti-Unit is Ω, transmission line of electricity propagation coefficientUnit 1/km, wherein L are should
Transmission line of electricity line length, unit is km, and the transmission line of electricity simulation calculation phase unit self-admittance is y0=λ/zc, unit S, unit
Length self-capacitance c0=Im (y0)/ω。
C) the alternate mutual capacitance simulation calculation of transmission line of electricity.
As shown in figure 5, between single-ended method simulated line two-phase transmission line of electricity during mutual capacitance, in EMTP simulated environment, step
1, single phase poaer supply, terminal open circuit, remaining phase head end ground connection, terminal open circuit are applied to a wherein phase transmission line of electricity head end to be calculated.
Step 2, simulation calculation applies power supply phase head end voltage phasorAnother phase head end electric current phasorStep 3, emulates data analysis
Calculate.According to EMTP simulation results, the alternate mutual capacitance of unit length between the two-phase transmission line of electricity
Unit F/km.
As shown in fig. 6, when both-end method is emulated, if transmission line of electricity system is N phases, any i phases of simulation calculation and the alternate mutual electricity of j
Hold cij, in EMTP simulated environment, step 1 applies single phase poaer supply to the i-th phase transmission line of electricity head end, and terminal open circuit, remaining phase is first
End ground connection, terminal open circuit.Step 2, simulation calculation i phase head end voltage phasorTerminal voltage phasorJ phase head end electric currentsWith terminal voltageStep 3, in the same way to power transmission line in other the N phase transmission systems outside removing i phases in addition
Road applies power supply, terminal open circuit, remaining phase conductor head end ground connection, terminal open circuit.The amount of simulation calculation is identical with the above, that is, apply
Power supply phase first and end voltage, remaining phase head end electric current and terminal voltage.Step 4, emulation data analysis is calculated.EMTP is emulated
Result of calculation brings equation group intoM ≠ j in formula,
I takes 1 to N-1, and j takes i+1 to N.N phase conductors system can list altogether the 1+2+3+... containing 1+2+3+...+N-1 unknown number
+ N-1 units equation group, simultaneous solution goes out all alternate transadmittance Yij, and then obtain alternate mutual capacitance cij=Yij/(L·jω)。
D) transmission line of electricity mutual impedance simulation calculation.
As shown in fig. 7, end is not related to measurement amount in the simulation calculation of mutual impedance, so single-ended method is imitated with both-end method
True calculation is identical.In EMTP simulated environment, step 1 applies single-phase to a wherein phase transmission line of electricity head end to be calculated
Power supply, end ground connection, remaining phase head end open circuit, end ground connection.Step 2, simulation calculation applies power supply phase head end electric current phasor
Remaining sensing phase head end induced voltage phasorRemaining mutual impedance adopts same method simulation calculation.Step 3, emulates number
According to analytical calculation.According to EMTP simulation results, method one, transmission line of electricity mutual impedanceWherein L is defeated
Electric line length；Method two,Wherein k ≠ j, k ≠
I, zi、yi、zj、yjj、yjkObtain in above simulation calculation, zi、yiRespectively apply the i phase conductor unit length impedances of power supply
With admittance；yjjTo sense the phase unit length self-admittance of phase j, yjkIt is and other mutually alternate unit length transadmittances of sensing.To short distance
Method one, the occasion preferably side of selecting having high demands to long distance transmission line or to mutual impedance computational accuracy are can select from transmission line of electricity
Method two.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (10)
1. a kind of power transmission line power frequency phase parameter emulated computation method, is characterized in that, including：
Obtain transmission line of electricity, ground wire, the basic parameter of transmission tower and transmission line of electricity soil resistivity along the line, and by above-mentioned ginseng
Number is transmitted to ATP-EMTP analogue systems；
Build ATP-EMTP simulation models；
Transmission line parameter is arranged：It is along the line according to basic parameter, the transmission line of electricity for obtaining transmission line of electricity, ground wire and transmission tower
Soil resistivity arranges the relevant parameter of the transmission line of electricity module in ATP-EMTP analogue systems；
Source is applied to working line；
The calculating of transmission line of electricity phase parameter：Using phase self-impedance, phase in single-ended method or both-end method computing electric power line phase parameter
Self-capacitance, phase mutual impedance, phase mutual capacitance, in ATP-EMTP analogue systems, lead according to single-ended method or both-end method to phase to be calculated
Line is opened a way, and short circuit is arranged, and applies power supply, the voltage phasor and electric current phasor of simulation calculation phase conductor to be calculated, according to survey
Above-mentioned each phase parameter of amount result computing electric power line.
2. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, build ATP-
During EMTP simulation models, according to transmission line of electricity soil resistivity along the line, electric transmission line erection mode, ground wire model and erection side
Formula, four factors of transmission line of electricity phase sequence determine model of power transmission system waypoint, four factors be with relation, if four factors are same
When it is consistent, then in a design segments；
Model of power transmission system is built：Lumped parameter model in ATP-EMTP analogue systems may be selected to short distance transmission line of electricity,
Distributed parameter model in ATP-EMTP analogue systems need to be selected to long distance transmission line.
3. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 2, is characterized in that, transmission line of electricity ginseng
When number is arranged, the parameter of setting includes Model modules and data moulds in the transmission line of electricity module in ATP-EMTP analogue systems
The parameter of block；
Arrange in Model modules transmission line of electricity type and corresponding feature, arrange soil resistivity, transmission line of electricity frequency of delivery and
Transmission line length；
Data modules arrange transmission line of electricity phase number, internal diameter, external diameter, D.C. resistance, horizontal range Horiz, conductor height Vtower,
Span centre drift height Vmid, heading spacing, ground wire shielding angle and division number.
4. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, apply signal source
For voltage source, and amplitude, frequency, angle, the beginning and ending time of the voltage source are set.
5. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, in transmission line of electricity
During the calculating of phase parameter, phase-splitter is set in transmission line of electricity terminal, a three phase line is divided into into three single-phase power transmission lines
Road, realizes the induced voltage of circuit to be calculated and the split-phase detection of electric current.
6. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, transmission line of electricity phase
Parameter in detection, probe current subject string is connected in each single-phase power transmission line, by detecting voltage source and be connected in sense
Each the single-phase power transmission line two ends answered, probe current source shows the current amplitude and angle for passing through, and detecting voltage source shows simultaneously
The voltage magnitude and angle of wiring waypoint.
7. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, transmission line of electricity phase
Self-impedance when emulating according to single-ended method, is specifically included in simulation calculation：
To phase conductor terminal open circuit to be calculated, head end applies single phase poaer supply, remaining phase two ends open circuit；
Simulation calculation measures phase head end voltage phasorElectric current phasor
By phase end to be calculated ground connection, the simulation calculation phase head end voltage phasorElectric current phasor
Emulation data analysis is calculated：According to EMTP simulation results, obtain transmission line of electricity characteristic impedance and transmission line of electricity is propagated
Coefficient, the transmission line of electricity simulation calculation phase unit self-impedance is the product of transmission line of electricity characteristic impedance and transmission line of electricity propagation coefficient.
8. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, transmission line of electricity phase
Self-impedance when emulating according to both-end method, is specifically included in simulation calculation：
Phase conductor head end to be calculated is applied into single phase poaer supply, end ground connection, remaining phase two ends open circuit；
The simulation calculation phase head end voltage phasorElectric current phasorAnd end current phasor
Emulation data analysis is calculated：According to EMTP simulation results, obtain transmission line of electricity characteristic impedance and transmission line of electricity is propagated
Coefficient, the transmission line of electricity simulation calculation phase unit self-impedance is the product of transmission line of electricity characteristic impedance and transmission line of electricity propagation coefficient.
9. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, transmission line of electricity phase
Self-capacitance when emulating according to single-ended method, is specifically included in simulation calculation：
To phase conductor terminal open circuit to be calculated, head end applies single phase poaer supply, and remaining mutually keeps two-terminal-grounding；
Simulation calculation measures phase head end voltage phasorElectric current phasor
By phase end to be calculated ground connection, the simulation calculation phase head end voltage phasorElectric current phasor
Emulation data analysis is calculated：According to EMTP simulation results, obtain transmission line of electricity characteristic impedance and transmission line of electricity is propagated
Coefficient, the transmission line of electricity simulation calculation phase unit self-admittance is the ratio of transmission line of electricity propagation coefficient and transmission line of electricity characteristic impedance,
Phase unit self-capacitance is the ratio of the imaginary part with angular frequency of phase unit self-admittance.
10. a kind of power transmission line power frequency phase parameter emulated computation method as claimed in claim 1, is characterized in that, transmission line of electricity
Phase self-capacitance when emulating according to both-end method, is specifically included in simulation calculation：
Phase conductor head end to be calculated is applied into single phase poaer supply, terminal open circuit, remaining phase two-terminal-grounding；
Simulation calculation measures phase head end voltage phasorElectric current phasorAnd terminal voltage phasor
Emulation data analysis is calculated.According to EMTP simulation results, obtain transmission line of electricity characteristic impedance and transmission line of electricity is propagated
Coefficient, the transmission line of electricity simulation calculation phase unit self-admittance is the ratio of transmission line of electricity propagation coefficient and transmission line of electricity characteristic impedance.
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| CN110596538A (en) * | 2019-09-23 | 2019-12-20 | 哈尔滨理工大学 | Method and system for calculating electrical parameters of power cable |
| CN113158396A (en) * | 2020-10-30 | 2021-07-23 | 国网河北省电力有限公司检修分公司 | Grounding method for overhauling power transmission line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109165441A (en) * | 2018-08-22 | 2019-01-08 | 国网安徽省电力有限公司 | The emulated computation method of parallel transmission line of alternation current induced voltage and electric current based on ATP-EMTP |
| CN109815593A (en) * | 2019-01-25 | 2019-05-28 | 周耘立 | A kind of analysis method of the distribution successive failure coupling mechanism of transmission |
| CN109815593B (en) * | 2019-01-25 | 2023-07-25 | 周耘立 | Analysis method for coupling propagation mechanism of successive faults of distribution network |
| CN110596538A (en) * | 2019-09-23 | 2019-12-20 | 哈尔滨理工大学 | Method and system for calculating electrical parameters of power cable |
| CN110596538B (en) * | 2019-09-23 | 2021-07-30 | 广西电网有限责任公司玉林供电局 | Method and system for calculating electrical parameters of power cable |
| CN113158396A (en) * | 2020-10-30 | 2021-07-23 | 国网河北省电力有限公司检修分公司 | Grounding method for overhauling power transmission line |
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