CN109376490A - A kind of cassie-mayr Simulation of Arc Models method - Google Patents
A kind of cassie-mayr Simulation of Arc Models method Download PDFInfo
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- CN109376490A CN109376490A CN201811514881.3A CN201811514881A CN109376490A CN 109376490 A CN109376490 A CN 109376490A CN 201811514881 A CN201811514881 A CN 201811514881A CN 109376490 A CN109376490 A CN 109376490A
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
This application discloses a kind of cassie-mayr Simulation of Arc Models methods, comprising: and the emulation of MHD electric arc is established by finite element emulation software, is determined under mounting medium, dissipated power and arc voltage, the relationship of arc current of electric arc；Cassier Arc Modelling and the series connection of mayr Arc Modelling, it is assumed that the cassier Arc Modelling and the mayr Arc Modelling are two non-linear arc resistances, establish the relationship of arc resistance and proportionality coefficient；Cassie-mayr Arc Modelling is established by pscad software, establishes the relation function of arc resistance and arc voltage and proportionality coefficient；Simulation parameter is chosen, according to the relation function of the arc resistance and arc voltage and proportionality coefficient, electric arc is emulated.The application by combining cassie Arc Modelling and mayr Arc Modelling according to a certain percentage, feature of the electric arc near high current area and current zero period can accurately be simulated, a kind of applied widely, Arc Modelling that model is simple and simulation accuracy is high is established, simulation efficiency and precision are improved.
Description
Technical field
This application involves model emulation technical field, in particular to a kind of cassie-mayr Simulation of Arc Models method.
Background technique
Currently, main model to be used is cassie Arc Modelling, mayr Arc Modelling and base in emulating to electric arc
In the improved model and arc resistance model of two kinds of Arc Modellings.But there is certain assumed condition in every kind of model, exist
Respective problem.During cassie Arc Modelling is applicable in the high current arcing before being primarily suitable for current over-zero, belong to application
During low current in low arc resistance high current occasion, and when mayr model is suitable for current over-zero, more suitable for low current,
High arc resistance occasion.Wherein, formula (1) and formula (2) are respectively the principle equation of cassie Arc Modelling, mayr Arc Modelling
Formula:
In formula, gcIndicate cassie Arc Modelling conductance, τ indicates that arc duration constant, u indicate arc voltage, ucIndicate electricity
Arc stablizes burning voltage, and i indicates arc current, gmIndicate mayr Arc Modelling conductance, p indicates mayr Arc Modelling dissipation work
Rate.
In electric arc experiment simulation, due to every kind of model have the shortcomings that it is corresponding, so leading to simulation result and practical wave
There is difference to a certain extent, existing Arc Modelling narrow application range in shape.
Summary of the invention
The application's is designed to provide a kind of cassie-mayr Simulation of Arc Models method, to solve existing electric arc mould
The problem of type narrow application range.
According to an embodiment of the present application, a kind of cassie-mayr Simulation of Arc Models method is provided, comprising:
The emulation of MHD electric arc is established by finite element emulation software, is determined under mounting medium, the dissipated power and electricity of electric arc
Arc voltage, the relationship of arc current；
Cassier Arc Modelling and the series connection of mayr Arc Modelling, it is assumed that the cassier Arc Modelling and mayr electricity
Arc model is two non-linear arc resistances, establishes the relationship of arc resistance and proportionality coefficient；
Cassie-mayr Arc Modelling is established by pscad software, according to the dissipated power of the electric arc and electric arc electricity
Pressure, arc current relationship, and, the relationship of the arc resistance and proportionality coefficient, establish arc resistance and arc voltage with
And the relation function of proportionality coefficient；
Simulation parameter is chosen, according to the relation function of the arc resistance and arc voltage and proportionality coefficient, to electric arc
It is emulated.
Further, described that the emulation of MHD electric arc is established by finite element emulation software, determine the electric arc under mounting medium
Dissipated power and arc voltage, arc current relationship the step of, comprising:
The MHD model that electric arc is established by finite element software obtains the dissipated power of electric arc, arc current by emulation
With the numerical value of arc voltage；
By numerical fitting, the dissipated power of the electric arc and the relationship of arc voltage, arc current are obtained；
Dissipated power and arc voltage, the relationship of arc current of the electric arc are as follows:
P=f (Uarc, i)；
Wherein, P is electric arc dissipated power, UarcTable is arc voltage, and i is arc current.
Further, the relationship of the arc resistance and proportionality coefficient are as follows:
Rarc=K1Rm+K2Rc；
Wherein, RarcFor arc resistance, RmFor mayr arc resistance, RcFor cassie arc resistance, K1For mayr electric arc electricity
Hinder proportionality coefficient；K2For cassie arc resistance proportionality coefficient.
Further, the relation function of the arc resistance and arc voltage and proportionality coefficient are as follows:
Rarc=f (Uarc, K1)；
Wherein, RarcFor arc resistance, K1For mayr arc resistance proportionality coefficient, UarcFor arc voltage.
Further, the simulation parameter includes arc voltage and proportionality coefficient.
From the above technical scheme, the embodiment of the present application provides a kind of cassie-mayr Simulation of Arc Models method,
Include: that the emulation of MHD electric arc is established by finite element emulation software, determines the dissipated power and electric arc of electric arc under mounting medium
The relationship of voltage, arc current；Cassier Arc Modelling and the series connection of mayr Arc Modelling, it is assumed that the cassier Arc Modelling
It is two non-linear arc resistances with the mayr Arc Modelling, establishes the relationship of arc resistance and proportionality coefficient；Pass through pscad
Software establishes cassie-mayr Arc Modelling, according to the relationship of the dissipated power of the electric arc and arc voltage, arc current,
And the relationship of the arc resistance and proportionality coefficient, establish the relationship letter of arc resistance and arc voltage and proportionality coefficient
Number；Simulation parameter is chosen, according to the relation function of the arc resistance and arc voltage and proportionality coefficient, electric arc is imitated
Very.The cassie-mayr Arc Modelling of variable proportion coefficient provided by the present application based on pscad, when the normal work of pilot system
When making, which has very high electric conductivity value, is equivalent to conducting wire, will not operate normally and have an impact to pilot system.When
Transient Electromagnetic Phenomena occurs in pilot system, when route fracture goes out or insulate weakness and goes out that arcing events will be will appear,
Arc Modelling is equivalent to a nonlinear resistance at this time, by combining cassie Arc Modelling and mayr electric arc according to a certain percentage
Model can accurately simulate feature of the electric arc near high current area and current zero period, carry out accurate simulation to test electric arc.This Shen
A kind of applied widely, Arc Modelling that model is simple and simulation accuracy is high please be establish, simulation efficiency and precision are improved.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow chart according to a kind of cassie-mayr Simulation of Arc Models method shown in the embodiment of the present application；
Fig. 2 is according to the cassie-mayr Arc Modelling based on pscad variable proportion coefficient shown in the embodiment of the present application
Structural block diagram；
Fig. 3 is according to the arc voltage current simulations waveform shown in the embodiment of the present application.
Specific embodiment
Refering to fig. 1 to Fig. 3, the embodiment of the present application provides a kind of cassie-mayr Simulation of Arc Models method, comprising:
Step S1, the emulation of MHD electric arc is established by finite element emulation software, determines the dissipation of electric arc under mounting medium
The relationship of power and arc voltage, arc current；
Further, described that the emulation of MHD electric arc is established by finite element emulation software, determine the electric arc under mounting medium
Dissipated power and arc voltage, arc current relationship the step of, comprising:
The MHD model that electric arc is established by finite element software obtains the dissipated power of electric arc, arc current by emulation
With the numerical value of arc voltage；
By numerical fitting, the dissipated power of the electric arc and the relationship of arc voltage, arc current are obtained；
Dissipated power and arc voltage, the relationship of arc current of the electric arc are as follows:
P=f (Uarc, i) and (3)
Wherein, P is electric arc dissipated power, UarcTable is arc voltage, and i is arc current.
Step S2, cassier Arc Modelling and the series connection of mayr Arc Modelling, it is assumed that the cassier Arc Modelling and institute
Stating mayr Arc Modelling is two non-linear arc resistances, establishes the relationship of arc resistance and proportionality coefficient；
Fig. 2 is the cassie-mayr Arc Modelling structural block diagram based on pscad variable proportion coefficient.By assuming that
Cassie-mayr Arc Modelling is that two non-linear arc resistance Rm and Rc are connected in series, and proportionality coefficient is K1And K2；
By the series connection cassie Arc Modelling of coefficient according to a certain percentage and mayr Arc Modelling, can overcome single
The deficiency of the cassie-mayr Arc Modelling of cassie Arc Modelling, mayr Arc Modelling and single ratio.
Further, the relationship of the arc resistance and proportionality coefficient are as follows:
Rarc=K1Rm+K2Rc (4)
Wherein, RarcFor arc resistance, RmFor mayr arc resistance, RcFor cassie arc resistance, K1For mayr electric arc electricity
Hinder proportionality coefficient；K2For cassie arc resistance proportionality coefficient.
Step S3, cassie-mayr Arc Modelling is established by pscad software, according to the dissipated power of the electric arc with
The relationship of arc voltage, arc current, and, the relationship of the arc resistance and proportionality coefficient establishes arc resistance and electric arc
The relation function of voltage and proportionality coefficient；
When one timing of arc voltage numerical value, change proportionality coefficient is K1And K2, then different arc resistances can be obtained, when
When changing arc voltage, then the relation function of arc resistance and arc voltage and Proportional coefficient K can be obtained.
Further, the relation function of the arc resistance and arc voltage and proportionality coefficient are as follows:
Rarc=f (Uarc, K1) (5)
Wherein, RarcFor arc resistance, K1For mayr arc resistance proportionality coefficient, UarcFor arc voltage.
Step S4, simulation parameter is chosen, according to the arc resistance and arc voltage and the relation function of proportionality coefficient,
Electric arc is emulated.
Further, the simulation parameter includes arc voltage and proportionality coefficient.
It is steady can to uniquely determine corresponding electric arc by choosing corresponding arc voltage and proportionality coefficient refering to Fig. 3
Determine resistance, accomplishes accurate simulation electric arc.
During low current when mayr and cassie model is respectively suitable for current over-zero at present, more it is suitable for small electricity
During high current arcing before stream, high arc resistance occasion and current over-zero, belong to applied to low arc resistance high current occasion.By two
A model is combined meeting so that applicable surface is wider；And since resistance characteristic, the arc resistance category of two models is presented in electric arc
It is divided in series connection, but dividing ratios coefficient is not definite value, so corresponding parameter K can be found by formula (5)1, can
Accurately to determine Arc Modelling according to not homologous ray.
From the above technical scheme, the embodiment of the present application provides a kind of cassie-mayr Simulation of Arc Models method,
Include: that the emulation of MHD electric arc is established by finite element emulation software, determines the dissipated power and electric arc of electric arc under mounting medium
The relationship of voltage, arc current；Cassier Arc Modelling and the series connection of mayr Arc Modelling, it is assumed that the cassier Arc Modelling
It is two non-linear arc resistances with the mayr Arc Modelling, establishes the relationship of arc resistance and proportionality coefficient；Pass through pscad
Software establishes cassie-mayr Arc Modelling, according to the relationship of the dissipated power of the electric arc and arc voltage, arc current,
And the relationship of the arc resistance and proportionality coefficient, establish the relationship letter of arc resistance and arc voltage and proportionality coefficient
Number；Simulation parameter is chosen, according to the relation function of the arc resistance and arc voltage and proportionality coefficient, electric arc is imitated
Very.The cassie-mayr Arc Modelling of variable proportion coefficient provided by the present application based on pscad, when the normal work of pilot system
When making, which has very high electric conductivity value, is equivalent to conducting wire, will not operate normally and have an impact to pilot system.When
Transient Electromagnetic Phenomena occurs in pilot system, when route fracture goes out or insulate weakness and goes out that arcing events will be will appear,
Arc Modelling is equivalent to a nonlinear resistance at this time, by combining cassie Arc Modelling and mayr electric arc according to a certain percentage
Model can accurately simulate feature of the electric arc near high current area and current zero period, carry out accurate simulation to test electric arc.This Shen
A kind of applied widely, Arc Modelling that model is simple and simulation accuracy is high please be establish, simulation efficiency and precision are improved.
Those skilled in the art will readily occur to its of the application after considering specification and practicing application disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following
Claim is pointed out.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.
Claims (5)
1. a kind of cassie-mayr Simulation of Arc Models method characterized by comprising
The emulation of MHD electric arc is established by finite element emulation software, is determined under mounting medium, dissipated power and the electric arc electricity of electric arc
Pressure, the relationship of arc current；
Cassier Arc Modelling and the series connection of mayr Arc Modelling, it is assumed that the cassier Arc Modelling and the mayr electric arc mould
Type is two non-linear arc resistances, establishes the relationship of arc resistance and proportionality coefficient；
Cassie-mayr Arc Modelling is established by pscad software, according to the dissipated power of the electric arc and arc voltage, electricity
The relationship of arc current, and, the relationship of the arc resistance and proportionality coefficient establishes arc resistance and arc voltage and ratio
The relation function of coefficient；
Simulation parameter is chosen, according to the relation function of the arc resistance and arc voltage and proportionality coefficient, electric arc is carried out
Emulation.
2. the method according to claim 1, wherein described, by finite element emulation software to establish MHD electric arc imitative
Very, determine under mounting medium, the dissipated power of electric arc and arc voltage, arc current relationship the step of, comprising:
The MHD model that electric arc is established by finite element software obtains the dissipated power of electric arc, arc current and electricity by emulation
The numerical value of arc voltage；
By numerical fitting, the dissipated power of the electric arc and the relationship of arc voltage, arc current are obtained；
Dissipated power and arc voltage, the relationship of arc current of the electric arc are as follows:
P=f (Uarc, i)；
Wherein, P is electric arc dissipated power, UarcTable is arc voltage, and i is arc current.
3. the method according to claim 1, wherein the relationship of the arc resistance and proportionality coefficient are as follows:
Rarc=K1Rm+K2Rc；
Wherein, RarcFor arc resistance, RmFor mayr arc resistance, RcFor cassie arc resistance, K1For mayr arc resistance ratio
Example coefficient；K2For cassie arc resistance proportionality coefficient.
4. the method according to claim 1, wherein the arc resistance and arc voltage and proportionality coefficient
Relation function are as follows:
Rarc=f (Uarc, K1)；
Wherein, RarcFor arc resistance, K1For mayr arc resistance proportionality coefficient, UarcFor arc voltage.
5. the method according to claim 1, wherein the simulation parameter includes arc voltage and ratio system
Number.
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Cited By (2)
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| CN113138310A (en) * | 2021-04-30 | 2021-07-20 | 嘉兴恒创电力设计研究院有限公司 | AC arc black box model, computing device and storage medium |
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