CN106529084A - Construction method for vacuum circuit breaker switch-on transient state simulation model - Google Patents
Construction method for vacuum circuit breaker switch-on transient state simulation model Download PDFInfo
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- CN106529084A CN106529084A CN201611101427.6A CN201611101427A CN106529084A CN 106529084 A CN106529084 A CN 106529084A CN 201611101427 A CN201611101427 A CN 201611101427A CN 106529084 A CN106529084 A CN 106529084A
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
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Abstract
The invention discloses a method for constructing a vacuum circuit breaker switch-on transient state simulation model on the basis of a PSCAD/EMTDC and C language interfacing technology. A circuit is loaded in a PSCAD/EMTDC environment, a user-defined circuit breaker module is designed, and the related electric power system simulation model is built through the PSCAD/EMTDC and C language interface technology. For simulating the transient state process in vacuum circuit breaker switch-on operation, control subfunctions are written in a C language environment, on-off of the circuit breaker model in a test circuit is controlled by means of the PSCAD/EMTDC and C language interfacing technology, and reality operation is simulated. According to the method, a prebreakdown phenomenon in the transient state process of the switch-on operation is taken into account, a dielectric strength recovery characteristic and a high-frequency current arc distinguishing characteristic curve are introduced, the vacuum circuit breaker switch-on process is divided into a primary prebreakdown stage, a secondary prebreakdown stage, a distinguished arc recovery stage and a physical switch-off stage, a state judging mark and a state variable are set in a control logic to be used for determining the transient stage of a vacuum circuit breaker, and then accurate control over the circuit breaker model is achieved.
Description
Technical field
The present invention relates to power system transient simulation technical field, refers in particular to one kind based on PSCAD/EMTDC and C language
The construction method of the vacuum circuit breaker combined floodgate Transient simulation model of interfacing.
Background technology
Vacuum circuit breaker has that arc extinguishing ability is strong, reliability is high, long service life, without fire hazard, be adapted to frequent operation
The advantages of, the application in power system and its power distribution network is increasingly extensive.Different from perfect condition, run in practical power systems
In, vacuum circuit breaker often because the prebreakdown during switching action, the phenomenon such as restrike cause system operatio overvoltage, is sent out
The Overvoltages such as the power station inner breaker phase insulation that changes punctures, bus voltage transformer high-voltage wire iron-melting fusing, seriously threaten parallel connection
Compensation device, endangers electrical equipment useful life, jeopardizes the insulation of power equipment, affects the normal operation of power system.This
It is bright that simulation analysis are carried out with regard to vacuum circuit breaker combined floodgate transient state mainly.
In the research and application of power system, it usually needs first emulated.This
Simulation software PSCAD/EMTDC is commonly used in bright use power system, be this software provides and complete programmed and pass through the imitative of test
True mode, it is allowed to which user graphically sets up circuit, operation emulation, analysis result, can be used for most power system
Emulation.PSCAD/EMTDC is realized on formula translation, thus the embedded performance of FORTRAN is good, and operational efficiency is high, but
The form of formula translation limits more, often affects to compile institute after efficiency, and program error when user writes large program
The error message for being given is indefinite so that debugging difficulty increases.C language has that feature richness, ability to express be strong, target program effect
Rate is high, it is portable good the advantages of, therefore the present invention selects PSCAD/EMTDC to carry out simulation study with C language interfacing.
The design of this phantom, used as the basis of field of power research, simulated implementation vacuum circuit breaker is in reality
The prebreakdown phenomenon that border operation occurs in closing a floodgate, can emulate open circuit in operation states of electric power system in power system follow-up study
The problems such as overvoltage that device combined floodgate transient state causes, there are certain research and engineering application value.
The content of the invention
The present invention be directed to it is not enough present in traditional vacuum chopper emulation mode, vacuum circuit breaker transient process is entered
A kind of row micronization processes, it is proposed that vacuum circuit breaker combined floodgate transient emulation mould based on PSCAD/EMTDC and C language interfacing
The construction method of type, realizes the analog simulation to vacuum circuit breaker model actual condition.
For achieving the above object, technical scheme provided by the present invention is：A kind of vacuum circuit breaker combined floodgate transient emulation mould
The construction method of type, comprises the following steps：
1) test circuit of the foundation comprising power supply, circuit, chopper and load under PSCAD/EMTDC environment, wherein, institute
State the structure that breaker portion uses rlc circuit ideal chopper in parallel；
2) custom block is built under PSCAD/EMTDC environment, and set up C language file edit control letter in outside
Number, using PSCAD/EMTDC and the technology of C language interface, is imitated by FORTRAN, numeral in custom block using statement code
True dynamic subroutine DSDYN and numeral simulation data subprogram DSOUT call the C language function in external source file, realize disconnected
The control of road device folding condition；
3) analyze the prebreakdown phenomenon of the actual closing operation of vacuum circuit breaker, loading chopper both end voltage, by electric current
Data, calculate dielectric strength and high frequency electric arc-rupturing capacity between contact gap；
4) circuit-breaker status variable is arranged according to the Preliminary breakdown process of the actual closed procedure of vacuum circuit breaker, and will be repeatedly pre-
Puncture and divide into first time prebreakdown and two stages of prebreakdown again, first time prebreakdown is set, prebreakdown, blow-out are extensive again
Multiple state and chopper physics four condition adjudgement marks of combined floodgate；
5) according to step 4) in four condition adjudgement marks determine vacuum circuit breaker status this moment, update vacuum circuit breaker
The state variable of device, and according to state variable set chopper folding signal and export control circuit breaker element in artificial circuit
Folding condition, it is specific as follows：
First, the transient period according to residing for loading data and state variable judge vacuum circuit breaker, corresponding statess are judged
For TRUE, other condition adjudgements are masked as FALSE to traffic sign placement, then update vacuum circuit breaker according to four condition adjudgement marks
Device state variable, finally by folding the output correlation signal of new state variable control chopper.
In step 1) in, the test circuit is single-phase circuit, and its circuit pack is RL series circuits, and its loading section is
RLC parallel circuits.
In step 2) in, use PSCAD/EMTDC and the technology of C language interface to be emulated, PSCAD/EMTDC's
Under simulated environment, set up custom block and code is write in the script Script of custom block, call external source file
In C language function, public array STORI, STOPL provided by using PSCAD/EMTDC, STOPF and self-defined array
STOR, realizes PSCAD/EMTDC systems to the data transfer of outside C language file, and by these arrays by C language file
Data be sent to PSCAD/EMTDC, so as to realize the data transfer between multiple emulation submodules of vacuum circuit breaker model.
In step 3) in, based on prebreakdown transient process, it is the preshot for fully studying the actual closed procedure of vacuum circuit breaker
Through journey and control program is write, dielectric strength recovery characteristics, high frequency electric blow-out characteristic between contacts for vacuum-break switches gap
Following analysis is carried out：
A. dielectric strength recovery characteristics
The dielectric strength of vacuum circuit breaker recovers a critically important parameter for being analysis vacuum circuit breaker transient process, from
The contact of vacuum circuit breaker start action moment rise, the dielectric strength between contact by with contact pitch from reduction from maximum
Start to reduce；Fast in view of the contact closure speed of vacuum circuit breaker, decision is carried out simplifying calculating not with a rank multinomial
Dielectric strength U of vacuum circuit breaker in the same timeb：
Ub=Ublimit-A(t-tclose)-B (1)
Wherein, UblimitIt is vacuum circuit breaker limit dielectric strength, the dielectric material between its numerical values recited and contact of breaker
It is relevant；Closing speeds of the A for contact；T is the current emulation moment；tcloseStart movement time for contact of breaker；B is that dielectric is strong
Degree constant；
B. high frequency electric blow-out characteristic
In vacuum circuit breaker combined floodgate transient analysis, the blow-out characteristic of electric current is a highly important research characteristic, electricity
The marginal value of rheology rate di/dt is also adopted by a single order as high frequency electric arc-rupturing capacity as blow-out condition adjudgement foundation
Polynomial repressentation:
Di/dt=C (t-tclose)+D (2)
Wherein, C is the rising scale of high frequency electric arc-rupturing capacity；High frequency electric arc-rupturing capacity when D starts to close a floodgate for contact.
In step 4) in, the combined floodgate stage residing for vacuum circuit breaker is recovered and high frequency by current and voltage data, dielectric strength
On electric current arc-rupturing capacity and chopper, status are together decided on a moment, by assigning to condition adjudgement mark and state variable
Value, realizes the control to chopper model, simulates the making process in practical operation.
The present invention compared with prior art, has the advantage that and beneficial effect：
1st, the phantom that the present invention builds has used PSCAD/EMTDC and C language interfacing, in PSCAD/EMTDC
The middle vacuum circuit breaker model set up similar to black box model, enriches with reference to PSCAD/EMTDC component libraries element, allows user
Graphically simultaneously analysis result and C language exploitation high efficient and flexible, compatibility are strong, compiling mistake is convenient, program for operation emulation
The characteristics such as operational efficiency height, the actual combined floodgate transient process of more preferable simulation.
2nd, during the phantom that the present invention builds considers actual making process, the prebreakdown repeatedly that vacuum circuit breaker occurs
Combined floodgate transient state is logically divided into first time prebreakdown, prebreakdown, blow-out recovery and physics close four ranks again by phenomenon
Section.As in vacuum circuit breaker making process, first time prebreakdown generally power frequency punctures, repeatedly prebreakdown is hit for high frequency thereafter
Wear, first time prebreakdown characteristically has significantly difference with prebreakdown phenomenon thereafter, therefore the present invention will be repeatedly pre-
Puncture and divide into first time prebreakdown and two stages of prebreakdown again；Due to sending out in vacuum circuit breaker after two kinds of prebreakdown stages
Raw blow-out process is similar to, therefore the stage is referred to as blow-out and recovers state；Last dielectric strength is reduced to zero, and vacuum circuit breaker is touched
There is physical contact between head, vacuum circuit breaker enters physics close stage.Custom block is according to chopper both end voltage, logical
Dielectric strength that the data such as overcurrent and dependent linearity polynomial computation go out, high frequency electric arc-rupturing capacity, determine vacuum circuit breaker
State in which, and control the closure of preferable chopper model to simulate prebreakdown phenomenon.Therefore, the emulation mould that the present invention builds
Type can more accurately vacuum circuit breaker combined floodgate transient process under analogue simulation operating mode.
Description of the drawings
Fig. 1 is that the present invention builds vacuum circuit breaker combined floodgate transient emulation mould based on PSCAD/EMTDC with C language interfacing
The flow chart of type.
Fig. 2 is the single-phase test circuit schematic diagram of phantom of the present invention.
Fig. 3 is phantom custom block structure chart of the present invention.
Fig. 4 is vacuum circuit breaker combined floodgate simulation result (0s 0.04s)：Flow through the electric current of vacuum circuit breaker.
Fig. 5 is vacuum circuit breaker combined floodgate simulation result (0.0175s 0.0189s)：Flow through the electric current of vacuum circuit breaker.
Fig. 6 is vacuum circuit breaker combined floodgate simulation result (0s 0.04s)：The voltage at vacuum circuit breaker two ends and dielectric strength.
Fig. 7 is vacuum circuit breaker combined floodgate simulation result (0.0175s 0.0189s)：The voltage at vacuum circuit breaker two ends and Jie
Electric intensity.
Specific embodiment
With reference to specific embodiment, the present invention is described further.
As shown in figure 1, based on PSCAD/EMTDC and the vacuum circuit breaker combined floodgate Transient simulation model of C language interfacing
Example build, comprise the following steps：
1) basic test circuit is set up under PSCAD/EMTDC environment, as shown in Figure 2.The test circuit is by power supply, open circuit
Device, circuit and four parts of load composition.Wherein, breaker portion by from belt fuser parallel connection one RLC branch road constitute, line part
Divide and be reduced to RL series circuits, loading section is reduced to RLC parallel circuits.
2) custom block of black box model is configured similarly under PSCAD/EMTDC environment, and sets up C languages in outside
Speech file edit control function, using PSCAD/EMTDC and the technology of C language interface, using statement code by custom block
Middle FORTRAN, Digital Simulation dynamic subroutine (DSDYN) and digital simulation data subprogram (DSOUT) call external source file
In C language function, realize the control of chopper folding condition, custom block is as shown in Figure 3.
3) analyze the prebreakdown phenomenon of the actual closing operation of vacuum circuit breaker, loading chopper both end voltage, by electric current
Etc. data, dielectric strength and high frequency electric arc-rupturing capacity between contact gap is calculated.
Based on prebreakdown transient process, it is fully to study the Preliminary breakdown process of the actual closed procedure of vacuum circuit breaker and write
Control program, the present invention are carried out dielectric strength recovery characteristics, high frequency electric blow-out characteristic between contacts for vacuum-break switches gap
Analysis：
A. dielectric strength recovery characteristics
The dielectric strength of vacuum circuit breaker is recovered to be a critically important parameter for analyzing vacuum circuit breaker transient process.From
The contact of vacuum circuit breaker start action moment rise, the dielectric strength between contact by with contact pitch from reduction from maximum
Start to reduce.In view of vacuum circuit breaker contact closure speed quickly, the present invention approx carried out with a rank multinomial
Simplify and calculate not dielectric strength U of vacuum circuit breaker in the same timeb：
Ub=Ublimit-A(t-tclose)-B (1)
Wherein, UblimitIt is vacuum circuit breaker limit dielectric strength, the dielectric material between its numerical values recited and contact of breaker
It is relevant；Closing speeds of the A for contact；T is the current emulation moment；tcloseStart movement time for contact of breaker；B is that dielectric is strong
Degree constant；
B. high frequency electric blow-out characteristic
In vacuum circuit breaker combined floodgate transient analysis, the blow-out characteristic of electric current is a highly important research characteristic, electricity
The marginal value of rheology rate di/dt as high frequency electric arc-rupturing capacity, as blow-out condition adjudgement foundation, it is also possible to one one
Rank multinomial is represented:
Di/dt=C (t-tclose)+D (2)
Wherein, C is the rising scale of high frequency electric arc-rupturing capacity；High frequency electric arc-rupturing capacity when D starts to close a floodgate for contact.
4) circuit-breaker status variable is arranged according to the Preliminary breakdown process of the actual closed procedure of vacuum circuit breaker, and will be repeatedly pre-
Puncture and divide into first time prebreakdown and two stages of prebreakdown again, first time prebreakdown is set, prebreakdown, blow-out are extensive again
Multiple state and chopper physics four condition adjudgement marks of combined floodgate.According to relevant parameter, reference state variable is sentenced to correlation behavior
Disconnected mark assignment.The combined floodgate stage residing for vacuum circuit breaker is put out by the master datas such as current/voltage, dielectric strength and high frequency electric
In arc ability and chopper, status are together decided on a moment, by condition adjudgement mark and state variable assignment, real
The now control to chopper model, simulates the making process in practical operation.
5) according to step 4) in four condition adjudgement marks determine vacuum circuit breaker status this moment, update vacuum circuit breaker
The state variable of device, and according to state variable set chopper folding signal and export control circuit breaker element in artificial circuit
Folding condition, it is specific as follows：
First, the transient period according to residing for loading data and state variable judge vacuum circuit breaker, corresponding statess are judged
For TRUE, other condition adjudgements are masked as FALSE to traffic sign placement, then update vacuum circuit breaker according to four condition adjudgement marks
Device state variable, finally by folding the output correlation signal of new state variable control chopper.
In step 1) in, the vacuum circuit breaker model of the present invention is different from chopper in PSCAD/EMTDC component models storehouse
The ideal model of only one on off state switching, but the structure using rlc circuit ideal chopper in parallel simulate vacuum
Prebreakdown phenomenon that breaker closing transient process occurs and can be used in observation and analysis circuit and load end overvoltage situation
Accurate model.In actual closing operation, the electric current for circulating in systems will not be undergone mutation, according to constant-linkage theorem,
Inductance element in system can hinder the change of electric current so as to induce voltage in circuit, and the speed that electric current changes is got over
Hurry up, the magnitude of voltage for being induced will be bigger.Therefore it is the prebreakdown phenomenon and load end overvoltage of simulation making process, this is imitative
True mode increases a RLC parallel branch newly.The vacuum circuit breaker phantom simulates the prebreakdown of actual making process, high frequency
The transient processes such as electric current blow-out.The test circuit that this phantom is used is single-phase circuit.When the three-phase operation of chopper it is complete
When synchronous, three-phase circuit can be carried out split-phase research by the process for analyzing closing overvoltage, therefore can be according to single-phase circuit to line
Road system is researched and analysed.
In step 2) in, emulated with the technology of C language interface using PSCAD/EMTDC.The present invention is in PSCAD/
Under the simulated environment of EMTDC, set up custom block and code is write in the script Script of custom block, call outside
C language function in source file.By the present invention in that with PSCAD/EMTDC provide public array STORI, STOPL, STOPF
And self-defined array STOR, PSCAD/EMTDC systems are realized to the data transfer of outside C language file, and pass through these arrays
Data in C language file are sent to into PSCAD/EMTDC, so as to realize vacuum circuit breaker model multiple emulation submodules it
Between data transfer.
Phantom is set up according to above step, in the test circuit, chopper both end voltage and the electric current of chopper is flow through
As shown in Fig. 4 Fig. 7.The switching signal time of the vacuum circuit breaker model specification is 0.0145s, when vacuum circuit breaker model is examined
Switching signal is measured, its contact starts action, the distance between contact is gradually reduced, the dielectric strength in gap reduces therewith.This
In test circuit, the voltage at vacuum circuit breaker two ends is in sinusoidal variations with the time.When chopper both end voltage value more than dielectric it is strong
When spending, clearance for insulation will be by arc through so as to there is prebreakdown phenomenon.As illustrated, this example occur prebreakdown first when
Between be 0.0176s, subsequently also there occurs multiple prebreakdown, until 0.0188s vacuum circuit breakers are closed completely, closing success.This
Test circuit simulation result can illustrate to imitate with the vacuum circuit breaker combined floodgate transient state of C language interfacing based on PSCAD/EMTDC
Multiple prebreakdown phenomenon in the preferably simulation practical operation of true mode energy, has the simulated effect for more meeting actual condition, is suitable to
Other engineer applieds.
Embodiment described above is only the preferred embodiments of the invention, not limits the practical range of the present invention with this, therefore
The change made by all shapes according to the present invention, principle, all should cover within the scope of the present invention.
Claims (5)
1. a kind of construction method of vacuum circuit breaker combined floodgate Transient simulation model, it is characterised in that comprise the following steps：
1) test circuit comprising power supply, circuit, chopper and load is set up under PSCAD/EMTDC environment, it is wherein, described disconnected
Structure of the road device part using rlc circuit ideal chopper in parallel；
2) custom block is built under PSCAD/EMTDC environment, and set up C language file edit control function in outside, profit
With PSCAD/EMTDC and the technology of C language interface, using statement code by FORTRAN, Digital Simulation dynamic in custom block
Subprogram DSDYN and numeral simulation data subprogram DSOUT call the C language function in external source file, realize that chopper is opened
The control of conjunction state；
3) analyze the prebreakdown phenomenon of the actual closing operation of vacuum circuit breaker, loading chopper both end voltage, by current data,
Calculate dielectric strength between contact gap to recover and high frequency electric arc-rupturing capacity；
4) circuit-breaker status variable is arranged according to the Preliminary breakdown process of the actual closed procedure of vacuum circuit breaker, and by multiple prebreakdown
Divide into first time prebreakdown and two stages of prebreakdown again, first time prebreakdown is set, prebreakdown, blow-out recover shape again
State and chopper physics four condition adjudgement marks of combined floodgate；
5) according to step 4) in four condition adjudgement marks determine vacuum circuit breaker status this moment, update vacuum circuit breaker
State variable, and chopper folding signal is set according to state variable and opening for control circuit breaker element is exported in artificial circuit
Conjunction state, it is specific as follows：
First, the transient period according to residing for loading data and state variable judge vacuum circuit breaker, by corresponding statess judgement symbol
Be set to TRUE and other condition adjudgements are masked as FALSE, then vacuum circuit breaker shapes are updated according to four condition adjudgement marks
State variable, finally by folding the output correlation signal of new state variable control chopper.
2. the construction method of a kind of vacuum circuit breaker combined floodgate Transient simulation model according to claim 1, it is characterised in that：
In step 1) in, the test circuit is single-phase circuit, and its circuit pack is RL series circuits, and its loading section is that RLC is in parallel
Circuit.
3. the construction method of a kind of vacuum circuit breaker combined floodgate Transient simulation model according to claim 1, it is characterised in that：
In step 2) in, use PSCAD/EMTDC and the technology of C language interface to be emulated, in the simulated environment of PSCAD/EMTDC
Under, set up custom block and code is write in the script Script of custom block, call the C language in external source file
Function, public array STORI, STOPL provided by using PSCAD/EMTDC, STOPF and self-defined array STOR are realized
Data transfer of the PSCAD/EMTDC systems to outside C language file, and the data in C language file are passed by these arrays
PSCAD/EMTDC is sent to, so as to realize the data transfer between multiple emulation submodules of vacuum circuit breaker model.
4. the construction method of a kind of vacuum circuit breaker combined floodgate Transient simulation model according to claim 1, it is characterised in that：
In step 3) in, based on prebreakdown transient process, it is fully to study the Preliminary breakdown process of the actual closing operation of vacuum circuit breaker simultaneously
Control program is write, the dielectric strength recovery characteristics in contacts for vacuum-break switches gap, high frequency electric blow-out characteristic are carried out
It is following to analyze：
A. dielectric strength recovery characteristics
The dielectric strength of vacuum circuit breaker is recovered to be a critically important parameter for analyzing vacuum circuit breaker transient process, from vacuum
The contact of chopper start action moment rise, the dielectric strength between contact by with contact pitch from reduction from the beginning of maximum
Reduce；It is fast in view of the contact closure speed of vacuum circuit breaker, when decision carries out simplifying with a rank multinomial calculating difference
Carve dielectric strength U of vacuum circuit breakerb：
Ub=Ublimit-A(t-tclose)-B (1)
Wherein, UblimitIt is vacuum circuit breaker limit dielectric strength, the dielectric material between its numerical values recited and contact of breaker has
Close；Closing speeds of the A for contact；T is the current emulation moment；tcloseStart movement time for contact of breaker；B is dielectric strength
Constant；
B. high frequency electric blow-out characteristic
In vacuum circuit breaker combined floodgate transient analysis, the blow-out characteristic of electric current is a highly important research characteristic, and electric current becomes
The marginal value of rate di/dt is also adopted by a single order multinomial as high frequency electric arc-rupturing capacity as blow-out condition adjudgement foundation
Formula is represented:
Di/dt=C (t-tclose)+D (2)
Wherein, C is the rising scale of high frequency electric arc-rupturing capacity；High frequency electric arc-rupturing capacity when D starts to close a floodgate for contact.
5. the construction method of a kind of vacuum circuit breaker combined floodgate Transient simulation model according to claim 1, it is characterised in that：
In step 4) in, the combined floodgate stage residing for vacuum circuit breaker is recovered and high frequency electric blow-out by current and voltage data, dielectric strength
In ability and chopper, status are together decided on a moment, by condition adjudgement mark and state variable assignment, realizing
Control to chopper model, simulates the making process in practical operation.
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| CN107180124A (en) * | 2017-04-19 | 2017-09-19 | 华南理工大学 | Consider that vacuum circuit breaker is restriked the modeling and simulation method of characteristic |
| CN107291974A (en) * | 2017-05-02 | 2017-10-24 | 华南理工大学 | A kind of parameter tuning method of spring operation formula vacuum circuit breaker high frequency transient simulation model |
| CN107291974B (en) * | 2017-05-02 | 2020-06-19 | 华南理工大学 | Parameter setting method for high-frequency transient simulation model of spring-operated vacuum circuit breaker |
| CN107423474A (en) * | 2017-05-03 | 2017-12-01 | 华南理工大学 | Consider the modeling and simulation method of vacuum circuit breaker prebreakdown characteristic |
| CN107179501A (en) * | 2017-06-20 | 2017-09-19 | 华北电力大学（保定） | A kind of single-phase circuit breaker separating brake repeated breakdown analogue experiment installation |
| CN107179501B (en) * | 2017-06-20 | 2023-11-17 | 华北电力大学（保定） | Single-phase breaker break-brake heavy-duty breakdown simulation experiment device |
| CN107607813A (en) * | 2017-09-11 | 2018-01-19 | 厦门理工学院 | A kind of switch cubicle model combination property is shown and control system and its construction method |
| CN107844638A (en) * | 2017-10-16 | 2018-03-27 | 国网浙江省电力公司电力科学研究院 | A kind of breaker emulation mode and system for cut-offfing perceptual low current |
| CN109782162A (en) * | 2017-11-15 | 2019-05-21 | 中国电力科学研究院有限公司 | A kind of phase modifier fracture breaker arcing fault dynamic simulator system and method |
| CN111562493A (en) * | 2020-05-28 | 2020-08-21 | 西门子电力自动化有限公司 | Method and device for determining arc quenching time of circuit breaker |
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