CN108334684A - VFTO modeling and analysis methods in disconnecting switch moving process - Google Patents
VFTO modeling and analysis methods in disconnecting switch moving process Download PDFInfo
- Publication number
- CN108334684A CN108334684A CN201810069451.9A CN201810069451A CN108334684A CN 108334684 A CN108334684 A CN 108334684A CN 201810069451 A CN201810069451 A CN 201810069451A CN 108334684 A CN108334684 A CN 108334684A
- Authority
- CN
- China
- Prior art keywords
- disconnecting switch
- resistance
- ground
- over
- equivalent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000004458 analytical method Methods 0.000 title claims abstract description 28
- 239000008186 active pharmaceutical agent Substances 0.000 claims abstract description 50
- 238000004088 simulation Methods 0.000 claims description 38
- 230000005611 electricity Effects 0.000 claims description 11
- 230000001052 transient effect Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 abstract description 5
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
VFTO modeling and analysis methods in disconnecting switch moving process consider each influence factor in disconnecting switch moving process comprehensively so that artificial circuit is closer practical.Its circuit diagram element includes power supply u, mains side circuit internal resistance Ru, mains side line inductance Lu, stray capacitance C over the ground at power port and electric power connection lineu1And Cu2, disconnecting switch DS, disconnecting switch left and right sides stray capacitance C over the ground1And C2, disconnecting switch to line between load capacity equivalent resistance and equivalent inductance RLAnd LL, capacitance, equivalent resistance and the equivalent inductance value C, R of load capacity, L, mains side and load capacity side ground resistance r1And r2, arc resistance and port capacitance r (t) and c (t) etc. between disconnecting switch moving process middle port.Modeling and analysis methods provided by the invention, not only overall waveform matches modeling and simulating result with actual test waveform, and the waveform of transient state attenuation process also coincide with actual test result, to confirm the accuracy of modeling and analysis methods provided by the present invention.
Description
Technical field
The present invention relates to VFTO (very fast transient overvoltage) modeling and analysis methods in a kind of disconnecting switch moving process,
For carrying out modeling analysis to parameters such as VFTO amplitudes, phase, frequencies in disconnecting switch moving process.
Background technology
VFTO (very fast transient overvoltage) phenomenon is often gone out in the operating process such as disconnecting switch in electric system, breaker
Existing phenomenon, pulse is short along the rise time, frequency is high, amplitude is big, is endangered caused by and secondary device primary electric system
It is very important.At present for the VFTO problems in disconnecting switch moving process, there is many researchs, however at present for every
The modeling and analysis methods for leaving pass moving process are relatively simple, and the transient state that can not be accurately reflected in disconnecting switch moving process is existing
As simulation model and the comparison for exporting result and practical measured waveform are also less, in particular in disconnecting switch moving process
Transient voltage current waveform, amplitude, the emulation of frequency etc. and the comparison of actual measurement it is seldom, to determine established model
Accuracy.
Patent CN：106845030A provides a kind of modeling method that VFTO influences air core coil electronic mutual inductor,
VFTO, which can be achieved, influences air core coil electronic mutual inductor horizontal calculating.However its to focus on air core coil electronic type mutual
How the modeling of sensor models as the generating source of its VFTO and how accurately to model consistent with actual test to obtain
VFTO models, which is not directed to.
Patent CN：106709143A provides a kind of VFTO batches simulating analysis based on ATP automatic modelings and is
System describes the original ATP simulation models file of the stations GIS steady state information by reading and stores into database, carried out to file
It parses and changes, realize and the batch that multiple GIS stand is emulated.However, single GIS stands, how original ATP simulation models are established, with
And modeling post-simulation exports the comparison with measured result, is not directed in the patent.
Invention content
It is relatively simple for the simulation model of current disconnecting switch moving process, it can not reflect that disconnecting switch opens and closes full mistake
Journey, and lack and modeling analysis and test comparison this present situation are carried out to VFTO in disconnecting switch moving process, the present invention provides
A kind of VFTO modeling and analysis methods in disconnecting switch moving process, consider power port equivalent capacity, keep apart comprehensively
Close both sides over the ground stray capacitance, load capacity equivalent resistance and equivalent inductance value, mains side and load side ground resistance, keep apart
The influence of the factors such as the arc resistance of itself and equivalent capacity in moving process is closed, so that simulation result and actual test knot
Fruit is more nearly, and can more reflect practical situation.
The technical solution that the present invention takes is：
VFTO modeling and analysis methods in disconnecting switch moving process, including a kind of disconnecting switch moving process artificial circuit
Model, the simulation circuit model include：
Power supply u,
Mains side circuit internal resistance Ru、
Mains side line inductance Lu、
Power port stray capacitance C over the groundu1、
Stray capacitance C over the ground at electric power connection lineu2、
Disconnecting switch DS,
Stray capacitance C over the ground on the left of disconnecting switch DS1、
Stray capacitance C over the ground on the right side of disconnecting switch DS2、
The equivalent resistance R of line between disconnecting switch DS to load capacity CL、
The equivalent inductance L of line between disconnecting switch DS to load capacity CL、
Load capacity C,
Equivalent resistance R,
Equivalent inductance L,
The ground resistance r of the sides power supply u1、
The ground resistance r of the sides load capacity C2、
Arc resistance r (t) between disconnecting switch DS moving process middle ports,
Disconnecting switch DS moving process middle port capacitance c (t)；
The one end the power supply u connects mains side circuit internal resistance RuOne end, mains side circuit internal resistance RuThe other end connects mains side
Line inductance LuOne end, mains side line inductance LuThe other end connects the one end disconnecting switch DS, and the disconnecting switch DS other ends connect institute
The one end arc resistance r (t) is stated, arc resistance r (t) other end connects the equivalent resistance RLOne end, the equivalent resistance RL
The other end connects equivalent inductance LL, equivalent inductance LLThe one end connected load capacitance C, the load capacity C other ends connect the ground connection electricity
Hinder r2One end, the ground resistance r2The other end is grounded；
The power supply u other ends are separately connected：The ground resistance r1One end, power port stray capacitance C over the groundu1It is another
End, stray capacitance C over the ground at electric power connection lineu2Stray capacitance C over the ground on the left of the other end, disconnecting switch DS1The other end is kept apart
Close the right sides DS stray capacitance C over the ground2The other end, the load capacity C other ends；
Power port stray capacitance C over the groundu1One end connects mains side circuit internal resistance RuOne end,
Stray capacitance C over the ground at the electric power connection lineu2One end connects mains side line inductance LuThe other end,
Stray capacitance C over the ground on the left of the disconnecting switch DS1One end connects the one end disconnecting switch DS,
Stray capacitance C over the ground on the right side of the disconnecting switch DS2One end connects the equivalent resistance RLOne end,
The ground resistance r1The other end is grounded,
The one end the disconnecting switch DS connects described port capacitance c (t) one end, port capacitance c (t) other end connection
Arc resistance r (t) other end,
The equivalent resistance R is in parallel with load capacity C, and the load capacity C is in parallel with the equivalent inductance L.
Compared with common disconnecting switch moving process simulation model at present, model closer to physical cabling situation, because
And simulation result more coincide with test result waveform, is embodied in the following：
1) power port equivalent capacity C is consideredu1, since power port to the connecting line between disconnecting switch has a spacing
From, it is therefore desirable to consider Cu1Influence；
2) stray capacitance over the ground for considering disconnecting switch both sides, what it is due to the generation of disconnecting switch moving process is high frequency letter
Number, therefore in the case where stray capacitance capacitance is minimum over the ground, capacitive reactance also very little cannot use open circuit to replace；
3) equivalent resistance and equivalent inductance value of load capacity itself are considered；
4) influence of mains side and load side ground resistance is considered；
5) arc reignition and extinguishing in disconnecting switch moving process, opening and disconnection of the not simple consideration at switch,
But the influence of arc resistance and equivalent capacity is considered during arc reignition and extinguishing.At present when general modeling, electricity
Arc, which is restriked, thinks that switch closes, and resistance is generally considered as 0, and arc resistance is not only allowed in the present invention and is changed with time now
As more considering equivalent capacity between disconnecting switch two-port and changing with time phenomenon, so that simulation result is closer
Actual conditions.
VFTO modeling and analysis methods in disconnecting switch moving process, include the following steps：
Step 1：According to practical disconnecting switch model and folding speed, simulation circuit model parameter is set, including voltage, each
Resistance, each inductance, each capacitance；Especially to consider power port equivalent capacity, the left sides disconnecting switch DS stray capacitance over the ground
C1, stray capacitance C over the ground on the right side of disconnecting switch DS2, equivalent resistance R, equivalent inductance L, the sides power supply u ground resistance r1, load electricity
Hold the ground resistance r of the sides C2, each parameter can be according to progress such as the power supply u, disconnecting switch DS, load capacity c-type number of actual use
It calculates, ground resistance size to actual track by measuring to obtain；
Step 2：The setting of simulation step length：The interval time of simulation step length setting should be short enough, and typical time should be less thanHere 1ns or smaller are taken.
Step 3：Disconnecting switch DS arc reignitions or the process of extinguishing, consider arc resistance r (t) time-varying model and every
Leave the time-varying model for the port capacitance c (t) for closing DS.Disconnecting switch arc reignition or the process of extinguishing are not simply to switch
It is closed or disconnects, but to consider the time-varying model of arc resistance and the time-varying model of disconnecting switch both ends equivalent capacity, take
Shown in value mode such as formula (1) and (2).
Arc resistance r (t) between the disconnecting switch DS moving process middle ports and port capacitance c (t) is worth table
It is up to formula：
R (t)=r0(1+a*e-t/b) (1)
C (t)=c0*k*t (2)
Above in formula (1), (2), r0For initial resistance, value is generally less than 1 Ω；c0For initial capacitance, value pF
Grade；A, b, k are respectively corresponding coefficient, and the wherein value of a is generally 106Grade, the value of b are generally 10-9Grade, the value of k can
Speed is opened and closed according to disconnecting switch and is changed, and can use 1 in practice.
Arc resistance and port capacitance value expression between disconnecting switch moving process middle port are：R (t)=r0(1+
a*e-t/b) and c (t)=c0*k*t.Arc resistance and port capacitance are all made of time-varying model, can more really reflect moving process
The relevant parameter situation of change of middle arc channel so that analysis result is more acurrate.
VFTO modeling and analysis methods in a kind of disconnecting switch moving process of the present invention, technique effect are as follows：
1) power port equivalent capacity, disconnecting switch the both sides equivalent electricity of stray capacitance, load capacity over the ground, are considered comprehensively
The arc resistance and equivalent of itself in resistance and equivalent inductance value, mains side and load side ground resistance, disconnecting switch moving process
The influence of the factors such as capacitance, so that simulation result is more nearly with actual test result；
2), the arc resistance between disconnecting switch moving process middle port and port capacitance are all made of time-varying model, can be more
The relevant parameter situation of change of arc channel in true reflection moving process so that analysis result is more acurrate；
3), modeling and analysis methods provided by the invention, modeling and simulating result not only overall waveform and actual test waveform
It matches, and the waveform of transient state attenuation process also coincide with actual test result, to confirm modeling point provided by the present invention
The accuracy of analysis method.
Description of the drawings
Fig. 1 (a) is current common disconnecting switch moving process simulation model circuit diagram.
Fig. 1 (b) is disconnecting switch moving process simulation circuit model in the present invention.
Fig. 2 is simulation contact surface in invention.
Fig. 3 (a) is the simulation result of common model.
Fig. 3 (b) provides the simulation result diagram of model for the present invention.
Fig. 3 (c) is actual test result figure.
Fig. 3 (d) is the waveform enlarged drawing of Fig. 3 (a).
Fig. 3 (e) is the waveform enlarged drawing of Fig. 3 (b).
Fig. 3 (f) is the waveform enlarged drawing of Fig. 3 (c).
Fig. 4 is that the present invention is based on the programme diagrams of ATPDraw.
Specific implementation mode
VFTO modeling and analysis methods in disconnecting switch moving process, including a kind of disconnecting switch moving process artificial circuit
Model, as shown in Fig. 1 (b), which includes：
Power supply u,
Mains side circuit internal resistance Ru、
Mains side line inductance Lu、
Power port stray capacitance C over the groundu1、
Stray capacitance C over the ground at electric power connection lineu2、
Disconnecting switch DS,
Stray capacitance C over the ground on the left of disconnecting switch DS1、
Stray capacitance C over the ground on the right side of disconnecting switch DS2、
The equivalent resistance R of line between disconnecting switch DS to load capacity CL、
The equivalent inductance L of line between disconnecting switch DS to load capacity CL、
Load capacity C,
Equivalent resistance R,
Equivalent inductance L,
The ground resistance r of the sides power supply u1、
The ground resistance r of the sides load capacity C2、
Arc resistance r (t), disconnecting switch DS moving processes middle port electricity between disconnecting switch DS moving process middle ports
Hold c (t), value time to time change.
The one end the power supply u connects mains side circuit internal resistance RuOne end, mains side circuit internal resistance RuThe other end connects mains side
Line inductance LuOne end, mains side line inductance LuThe other end connects the one end disconnecting switch DS, and the disconnecting switch DS other ends connect institute
The one end arc resistance r (t) is stated, arc resistance r (t) other end connects the equivalent resistance RLOne end, the equivalent resistance RL
The other end connects equivalent inductance LL, equivalent inductance LLThe one end connected load capacitance C, the load capacity C other ends connect the ground connection electricity
Hinder r2One end, the ground resistance r2The other end is grounded；
The power supply u other ends are separately connected：The ground resistance r1One end, power port stray capacitance C over the groundu1It is another
End, stray capacitance C over the ground at electric power connection lineu2Stray capacitance C over the ground on the left of the other end, disconnecting switch DS1The other end is kept apart
Close the right sides DS stray capacitance C over the ground2The other end, the load capacity C other ends；
Power port stray capacitance C over the groundu1One end connects mains side circuit internal resistance RuOne end,
Stray capacitance C over the ground at the electric power connection lineu2One end connects mains side line inductance LuThe other end,
Stray capacitance C over the ground on the left of the disconnecting switch DS1One end connects the one end disconnecting switch DS,
Stray capacitance C over the ground on the right side of the disconnecting switch DS2One end connects the equivalent resistance RLOne end,
The ground resistance r1The other end is grounded,
The one end the disconnecting switch DS connects described port capacitance c (t) one end, port capacitance c (t) other end connection
Arc resistance r (t) other end,
The equivalent resistance R is in parallel with load capacity C, and the load capacity C is in parallel with the equivalent inductance L.
Arc resistance between the disconnecting switch moving process middle port and port capacitance, worth expression formula are：
R (t)=r0(1+a*e-t/b) (1)
C (t)=c0*k*t (2)
Above in two formulas, r0For initial resistance, value is generally less than 1 Ω；c0For initial capacitance, value is pF grades；a、b、k
Respectively corresponding coefficient, the wherein value of a are generally 106Grade, the value of b are generally 10-9Grade, the value of k can be according to isolation
Switch opens and closes speed and changes, and can use 1 in practice.
VFTO modeling and analysis methods in the disconnecting switch moving process, with disconnecting switch moving process common at present
Fig. 1 (a) shown in simulation model is compared, and model is closer to physical cabling situation, thus simulation result and test result waveform
It more coincide, to by emulating effective reflection actual conditions.Compared with common simulation model at present, difference have with
Lower several points：
1), current model usually only considers the stray capacitance C over the ground of mains side leading-out terminalu2, and ignore power port
Equivalent capacity Cu1, since power port to the connecting line between disconnecting switch has certain distance, it is therefore desirable to consider Cu1Shadow
It rings；
2), the stray capacitance over the ground of disconnecting switch both sides is taken into account, since what disconnecting switch moving process generated is
High-frequency signal, therefore in the case where stray capacitance capacitance is minimum over the ground, capacitive reactance also very little, cannot use open circuit to replace；
3), load capacity considers the equivalent resistance and equivalent inductance value of itself, although the capacitance of load capacity compared with
Greatly, it but due to the limitation of actual process, itself has corresponding equivalent resistance and equivalent inductance exists, can not neglect in high frequency
Depending on the influence of especially equivalent inductance is very important；
4) influence of mains side and load side ground resistance, is considered.Relevant device low pressure in disconnecting switch moving process
Terminal must be all grounded, although being connected together by ground wire, ground wire itself has certain resistance value, if
The influence of ground resistance is considered, model will be more accurate；
5), arc reignition and extinguishing in disconnecting switch moving process, opening and disconnection of the not simple consideration at switch,
But the influence of arc resistance and equivalent capacity is considered during arc reignition and extinguishing.At present when general modeling, electricity
Arc, which is restriked, thinks that switch closes, and resistance is generally considered as 0, and arc resistance is not only allowed in the present invention and is changed with time now
As more considering equivalent capacity between disconnecting switch two-port and changing with time phenomenon, so that simulation result is closer
Actual conditions.
VFTO modeling and analysis methods in the disconnecting switch moving process, simulation contact surface are as shown in Figure 2.In figure with
In case of disconnecting switch is closed a floodgate, separating brake situation is similar therewith.Its key point is：
1., according to practical disconnecting switch model and folding speed, artificial circuit parameter is set, including voltage, each resistance, each
Inductance, each capacitance.Especially to consider power port equivalent capacity, disconnecting switch both sides stray capacitance, load capacity over the ground
The factors such as equivalent resistance and equivalent inductance value, mains side and load side ground resistance.Each parameter can according to the power supply of actual use,
Disconnecting switch, load capacity model etc. are calculated.Ground resistance size can be by measuring to obtain to actual track.
2., the setting of simulation step length：Since the high-frequency signal frequency generated in disconnecting switch moving process is up to tens of MHz
It is even higher, therefore the interval time of simulation step length setting should be short enough, typical time should be less thanGenerally desirable 1ns or smaller in present invention emulation.
3., the process of disconnecting switch arc reignition or extinguishing, not simple switch is closed or disconnects, and to consider electricity
The time-varying model of arc resistance and the time-varying model of disconnecting switch both ends equivalent capacity, value mode such as formula (1) and (2) institute
Show.
VFTO modeling and analysis methods in the disconnecting switch moving process are tied compared with modeler model common at present
Fruit is as shown in Figure 3.Wherein Fig. 3 (a) waveforms are the simulation result diagram of Fig. 1 (a) models, and Fig. 3 (b) provides the imitative of model for the present invention
Very as a result, Fig. 3 (c) is actual test result.
The simulation result of the invention that model is provided and actual test result are can be seen that by the comparison of these three figures more
It coincide.The transient process of further contrast simulation waveform is that is, (in figure black by the waveform amplification in Fig. 3 (a), Fig. 3 (b), Fig. 3 (c)
Color circle position), obtain corresponding Fig. 3 (d), Fig. 3 (e), Fig. 3 (f) figure.Compare Fig. 3 (d), Fig. 3 (e), Fig. 3 (f) it is found that
Model provided by the invention, the transient-wave 3 (e) of emulation and transient-wave Fig. 3 (f) of actual test are more identical.
VFTO modeling and analysis methods in disconnecting switch moving process of the present invention, as a result of closer physical cabling feelings
The simulation circuit model of condition considers power port equivalent capacity, disconnecting switch both sides stray capacitance, load capacity over the ground comprehensively
The arc resistance of itself in equivalent resistance and equivalent inductance value, mains side and load side ground resistance, disconnecting switch moving process
And the influence of the factors such as equivalent capacity, so that simulation result is more nearly with actual test result, to pass through modeling from now on
Feasible method is provided to study VFTO phenomenons.
Compared with simulation model common at present, there is the following in difference：
1)：Consider power port equivalent capacity Cu1, current model usually only considers the miscellaneous over the ground of mains side leading-out terminal
Spurious capacitance, and power port equivalent capacity is ignored, since power port to the connecting line between disconnecting switch has certain distance,
Therefore it needs to consider its influence；
2)：The stray capacitance over the ground of disconnecting switch both sides is taken into account, since what disconnecting switch moving process generated is
High-frequency signal, therefore in the case where the capacitance of stray capacitance over the ground is minimum, capacitive reactance also very little, cannot use open circuit to replace；
3)：Load capacity considers the equivalent resistance and equivalent inductance value of itself, although the capacitance of load capacity compared with
Greatly, it but due to the limitation of actual process, itself has corresponding equivalent resistance and equivalent inductance exists, can not neglect in high frequency
Depending on the influence of especially equivalent inductance is very important；
4)；Consider the influence of mains side and load side ground resistance.Relevant device low pressure in disconnecting switch moving process
Terminal must be all grounded, although being connected together by ground wire, ground wire itself has certain resistance value, if
The influence of ground resistance is considered, model will be more accurate；
5)：Arc reignition and extinguishing in disconnecting switch moving process, opening and disconnection of the not simple consideration at switch,
But the influence of arc resistance and equivalent capacity is considered during arc reignition and extinguishing.At present when general modeling, electricity
Arc, which is restriked, thinks that switch closes, and resistance is generally considered as 0, and arc resistance is not only allowed in the present invention and is changed with time now
As more considering equivalent capacity between disconnecting switch two-port and changing with time phenomenon, so that simulation result is closer
Actual conditions.
Claims (4)
1. the VFTO modeling and analysis methods in disconnecting switch moving process, it is characterised in that：It was opened and closed including a kind of disconnecting switch
Journey simulation circuit model, the simulation circuit model include：
Power supply u,
Mains side circuit internal resistance Ru、
Mains side line inductance Lu、
Power port stray capacitance C over the groundu1、
Stray capacitance C over the ground at electric power connection lineu2、
Disconnecting switch DS,
Stray capacitance C over the ground on the left of disconnecting switch DS1、
Stray capacitance C over the ground on the right side of disconnecting switch DS2、
The equivalent resistance R of line between disconnecting switch DS to load capacity CL、
The equivalent inductance L of line between disconnecting switch DS to load capacity CL、
Load capacity C,
Equivalent resistance R,
Equivalent inductance L,
The ground resistance r of the sides power supply u1、
The ground resistance r of the sides load capacity C2、
Arc resistance r (t) between disconnecting switch DS moving process middle ports,
Disconnecting switch DS moving process middle port capacitance c (t)；
The one end the power supply u connects mains side circuit internal resistance RuOne end, mains side circuit internal resistance RuThe other end connects mains side circuit
Inductance LuOne end, mains side line inductance LuThe other end connects the one end disconnecting switch DS, and the disconnecting switch DS other ends connect the electricity
The one end arc resistance r (t), arc resistance r (t) other end connect the equivalent resistance RLOne end, the equivalent resistance RLIt is another
End connection equivalent inductance LL, equivalent inductance LLThe one end connected load capacitance C, the load capacity C other ends connect the ground resistance r2
One end, the ground resistance r2The other end is grounded；
The power supply u other ends are separately connected：The ground resistance r1One end, power port stray capacitance C over the groundu1The other end,
Stray capacitance C over the ground at electric power connection lineu2Stray capacitance C over the ground on the left of the other end, disconnecting switch DS1The other end, disconnecting switch
Stray capacitance C over the ground on the right side of DS2The other end, the load capacity C other ends；
Power port stray capacitance C over the groundu1One end connects mains side circuit internal resistance RuOne end,
Stray capacitance C over the ground at the electric power connection lineu2One end connects mains side line inductance LuThe other end,
Stray capacitance C over the ground on the left of the disconnecting switch DS1One end connects the one end disconnecting switch DS,
Stray capacitance C over the ground on the right side of the disconnecting switch DS2One end connects the equivalent resistance RLOne end,
The ground resistance r1The other end is grounded,
The one end the disconnecting switch DS connects described port capacitance c (t) one end, described in port capacitance c (t) other end connection
Arc resistance r (t) other ends,
The equivalent resistance R is in parallel with load capacity C, and the load capacity C is in parallel with the equivalent inductance L.
2. the VFTO modeling and analysis methods in disconnecting switch moving process according to claim 1, it is characterised in that including with
Lower step：
Step 1：According to practical disconnecting switch model and folding speed, simulation circuit model parameter, including voltage, each electricity are set
Resistance, each inductance, each capacitance；Especially to consider power port equivalent capacity, the left sides disconnecting switch DS stray capacitance C over the ground1、
Stray capacitance C over the ground on the right side of disconnecting switch DS2, equivalent resistance R, equivalent inductance L, the sides power supply u ground resistance r1, load capacity C
The ground resistance r of side2, each parameter can be counted according to the power supply u, disconnecting switch DS, load capacity c-type number etc. of actual use
It calculates, ground resistance size to actual track by measuring to obtain；
Step 2：The setting of simulation step length：The interval time of simulation step length setting should be short enough, Here 1ns or smaller are taken；
Step 3：Disconnecting switch DS arc reignitions or the process of extinguishing consider the time-varying model of arc resistance r (t) and keep apart
Close the time-varying model of the port capacitance c (t) of DS.
3. the VFTO modeling and analysis methods in disconnecting switch moving process according to claim 2, it is characterised in that：
Arc resistance r (t) between the disconnecting switch DS moving process middle ports and port capacitance c (t) is worth expression formula
For：
R (t)=r0(1+a*e-t/b) (1)
C (t)=c0*k*t (2)
Above in formula (1), (2), r0For initial resistance, value is generally less than 1 Ω；c0For initial capacitance, value is pF grades；a、
B, k is respectively corresponding coefficient, and the wherein value of a is generally 106Grade, the value of b are generally 10-9Grade, the value of k can according to every
It leaves pass folding speed and changes, can use 1 in practice.
4. the VFTO modeling and analysis methods in the disconnecting switch moving process as described in claims 1 or 2 or 3, it is characterised in that：With
In to the VFTO amplitudes in disconnecting switch moving process, phase, frequency parameter progress modeling analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810069451.9A CN108334684B (en) | 2018-01-24 | 2018-01-24 | VFTO modeling analysis method in opening and closing process of isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810069451.9A CN108334684B (en) | 2018-01-24 | 2018-01-24 | VFTO modeling analysis method in opening and closing process of isolating switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108334684A true CN108334684A (en) | 2018-07-27 |
| CN108334684B CN108334684B (en) | 2021-10-12 |
Family
ID=62925606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810069451.9A Active CN108334684B (en) | 2018-01-24 | 2018-01-24 | VFTO modeling analysis method in opening and closing process of isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108334684B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988330A (en) * | 2018-08-01 | 2018-12-11 | 广东电网有限责任公司 | A kind of simulating method for electric power system considering disconnecting switch fracture electric arc |
| CN110233481A (en) * | 2019-06-28 | 2019-09-13 | 国家电网有限公司 | The emulation mode of isolation switch in a kind of power network topology |
| CN111273166A (en) * | 2018-12-05 | 2020-06-12 | 西安高压电器研究院有限责任公司 | Little inductive current of isolator test circuit that opens and shuts |
| CN117406022A (en) * | 2023-10-19 | 2024-01-16 | 国网湖北省电力有限公司荆门供电公司 | Travelling wave speed dynamic correction method suitable for high-voltage line length change |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120032686A1 (en) * | 2010-02-23 | 2012-02-09 | Tsinghua University | Voltage source for calibrating a fast transient voltage measurement system and calibration method |
| CN106707126A (en) * | 2017-01-06 | 2017-05-24 | 贵州电网有限责任公司电力科学研究院 | Potential transformer electromagnetic transient modeling and analysis method of VFTO (very fast transient overvoltage) analysis of GIS (gas insulated switchgear) substation |
| CN106709143A (en) * | 2016-11-15 | 2017-05-24 | 山东电力设备有限公司 | VFTO batch simulation analysis method and system based on ATP automatic modeling |
| CN106845030A (en) * | 2017-03-10 | 2017-06-13 | 国网江苏省电力公司电力科学研究院 | The modeling method that VFTO influences on air core coil electronic mutual inductor |
-
2018
- 2018-01-24 CN CN201810069451.9A patent/CN108334684B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120032686A1 (en) * | 2010-02-23 | 2012-02-09 | Tsinghua University | Voltage source for calibrating a fast transient voltage measurement system and calibration method |
| CN106709143A (en) * | 2016-11-15 | 2017-05-24 | 山东电力设备有限公司 | VFTO batch simulation analysis method and system based on ATP automatic modeling |
| CN106707126A (en) * | 2017-01-06 | 2017-05-24 | 贵州电网有限责任公司电力科学研究院 | Potential transformer electromagnetic transient modeling and analysis method of VFTO (very fast transient overvoltage) analysis of GIS (gas insulated switchgear) substation |
| CN106845030A (en) * | 2017-03-10 | 2017-06-13 | 国网江苏省电力公司电力科学研究院 | The modeling method that VFTO influences on air core coil electronic mutual inductor |
Non-Patent Citations (1)
| Title |
|---|
| 刘教民等: "隔离开关电弧模型及参数对特快速暂态过电压仿真结果的影响分析", 《华北电力大学学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988330A (en) * | 2018-08-01 | 2018-12-11 | 广东电网有限责任公司 | A kind of simulating method for electric power system considering disconnecting switch fracture electric arc |
| CN108988330B (en) * | 2018-08-01 | 2021-09-03 | 广东电网有限责任公司 | Power system simulation method considering electric arc of isolating switch fracture |
| CN111273166A (en) * | 2018-12-05 | 2020-06-12 | 西安高压电器研究院有限责任公司 | Little inductive current of isolator test circuit that opens and shuts |
| CN110233481A (en) * | 2019-06-28 | 2019-09-13 | 国家电网有限公司 | The emulation mode of isolation switch in a kind of power network topology |
| CN117406022A (en) * | 2023-10-19 | 2024-01-16 | 国网湖北省电力有限公司荆门供电公司 | Travelling wave speed dynamic correction method suitable for high-voltage line length change |
| CN117406022B (en) * | 2023-10-19 | 2024-05-17 | 国网湖北省电力有限公司荆门供电公司 | Travelling wave speed dynamic correction method suitable for high-voltage line length change |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108334684B (en) | 2021-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108334684A (en) | VFTO modeling and analysis methods in disconnecting switch moving process | |
| CN109307824B (en) | Clustering-based power distribution network single-phase earth fault section positioning method | |
| CN103323718B (en) | Capacitive high-voltage equipment insulation aging diagnostic test system and working method thereof | |
| CN105403810B (en) | A kind of fault line selection for indirectly grounding power system device universal test system and method | |
| CN104155626B (en) | The system that ground potential climbing capacity resisted by a kind of detection voltage transformer | |
| CN103941156B (en) | Multi-information acquisition Section Location based on extreme learning machine | |
| CN108181547A (en) | A kind of dynamic time warping distance fault section location method based on Time Series Compression | |
| CN108647479B (en) | Lightning arrester fault transient waveform diagnosis method and device | |
| CN108120895A (en) | A kind of wave of oscillation detection deformation of transformer winding circuit and method | |
| CN206096310U (en) | Join in marriage net dynamic simulation test platform | |
| CN111460605B (en) | Transformer broadband hybrid model considering core nonlinearity and building method thereof | |
| CN106646163B (en) | For condenser type compound insulated bus system lightning impulse test circuit and method | |
| CN105548942A (en) | System and method for analyzing transient characteristics of electronic current transformer | |
| CN104237758A (en) | Method for testing impulse withstand voltages of ultrahigh-voltage converter transformers on basis of scale models | |
| CN109490764A (en) | A kind of detection circuit, vehicle, detection device and detection method | |
| CN104502861A (en) | Gaussian even pulse high-current high-power broadband power wire injection coupling network and construction method thereof | |
| CN109307816A (en) | Power equipment test method based on substation's hybrid electromagnetic interference simulation | |
| Wang et al. | Partial discharge location in power transformers | |
| CN103018525B (en) | Transformer station's internal short-circuit distribution of current is carried out to the apparatus and method of synchro measure | |
| CN105093162A (en) | Method and device for calibrating measurement error of electric energy meter under pulse train interference condition | |
| CN107290624B (en) | Three-phase distribution line model suitable for non-effective ground connection distribution network | |
| Mirzaei | A simple fast and accurate simulation method for power transformer lightning impulse test | |
| CN106443549B (en) | A kind of analog AC resistance device for calibration battery internal resistance test device | |
| CN109283437A (en) | PT broken string and singlephase earth fault simulator and method | |
| Tang et al. | Faulty feeder detection based on the composite factors in resonant grounding distribution system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20180727 Assignee: Yichang Yizhixing Technology Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980034895 Denomination of invention: VFTO modeling and analysis method during the opening and closing process of isolation switches Granted publication date: 20211012 License type: Common License Record date: 20230426 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20180727 Assignee: Hubei Zhikan Technology Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980043945 Denomination of invention: VFTO modeling and analysis method during the opening and closing process of isolation switches Granted publication date: 20211012 License type: Common License Record date: 20231024 |