CN107844638A - A kind of breaker emulation mode and system for cut-offfing perceptual low current - Google Patents
A kind of breaker emulation mode and system for cut-offfing perceptual low current Download PDFInfo
- Publication number
- CN107844638A CN107844638A CN201710970438.6A CN201710970438A CN107844638A CN 107844638 A CN107844638 A CN 107844638A CN 201710970438 A CN201710970438 A CN 201710970438A CN 107844638 A CN107844638 A CN 107844638A
- Authority
- CN
- China
- Prior art keywords
- breaker
- unit
- value
- less
- dams
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of breaker emulation mode and system for cut-offfing perceptual low current.Shunt reactor switching especially empty bus-bar system switching when, easily occur damming, electric arc resume combustion and equivalent phenomena such as damming, and then produce switching overvoltage, cause the failures such as bus phase fault, interphase short circuit of reactor and the damage of reactor turn-to-turn insulation, electrical equipment safety is threatened, influences system safety operation.The present invention applies PSCAD Transient State Simulation Softwares, it is proposed that using the value I that damsc, fracture medium recovery strength Ud, high frequency electric arc-rupturing capacity Δ I three elements structure breaker model, can simulate breaker when cut-offfing perceptual low current dam, resume combustion, the transition effect such as repeated breakdown.The present invention solves the evaluation problem of switching overvoltage when shunt reactor is cut-off in 35kV power systems, can provide suggestion for the selection of Overvoltage suppressing measure and follow-up transformation, the safe and reliable operation for improving power system is horizontal.
Description
Technical field
The present invention relates to Hyper-Voltage of Power Systems and Insulation Coordination field, specifically one kind cut-offs parallel connection for assessment
The breaker emulation mode and system of switching overvoltage during reactor (cut-offfing perceptual low current).
Background technology
Shunt reactor switching especially empty bus-bar system switching when, easily occur damming, electric arc resume combustion, repeated breakdown and wait
Phenomena such as effect is dammed, and then switching overvoltage is produced, cause bus phase fault, interphase short circuit of reactor and reactor turn-to-turn
The failures such as insulation damage, electrical equipment safety is threatened, influences system safety operation.
In recent years, switching frequently occur for power system 220kV transformer stations (mainly cut-off) 35kV shunt reactors to cause
Equipment fault, had a strong impact on the safe and stable operation of power network.On the one hand because the condition of field measurement limits, on the other hand
Due to the randomness of switching overvoltage, the switching overvoltage for cut-offfing shunt reactor assesses needs by emulation tool.But imitative
In very, the transient process such as the damming of breaker, resume combustion, repeated breakdown is the difficult point of modeling, and overvoltage assesses order of accuarcy
Bottleneck.
At present, the breaker for cut-offfing perceptual low current there is no perfect, science the simulation modeling based on actual tests data
Method.Whether the overvoltage assessment result for emulating gained can be that the Overvoltage suppressing measure of correlation and power system insulation cooperation carry
For accurately instructing reference function to there is no method to confirm.The evaluation result of mistake easily causes the overvoltage protection measure of correlation can not
Comprehensive protective effect is played, so as to cause the main equipments such as main transformer to be damaged during catastrophe failure, or even fault spread
Serious consequence.
The content of the invention
The technical problems to be solved by the invention are the defects of overcoming above-mentioned prior art to exist, there is provided one kind cut-offs perception
The breaker emulation mode of low current, Transient simulation and overvoltage are assessed inaccurate when cut-offfing shunt reactor at present with solution
True problem.
Therefore, the present invention adopts the following technical scheme that：A kind of breaker emulation mode for cut-offfing perceptual low current, it is wrapped
Include following steps：
1) using the value I that damsc, fracture medium recovery strength UdBreaker is built with high frequency electric arc-rupturing capacity Δ I three elements
Model；
2) it is random to generate the value I that damsc；
3) breaker is waited to receive separating brake instruction；
4) judge whether breaker receives separating brake instruction, be to go to step 5)；It is no, go to step 3)；
5) current absolute value is waited to be less than the value I that damsc；
6) judge whether current absolute value is less than the value I that damsc, it is to go to step 7)；It is no, go to step 5)；
7) breaker disjunction；
8) fracture medium recovery strength U is waiteddLess than fracture transient recovery voltage Ut；
9) fracture medium recovery strength U is judgeddWhether fracture transient recovery voltage U is less thant, it is to go to step 10)；It is no, turn
Step 8)；
10) breaker breakdown conducting；
11) current changing rate is waited to be less than high frequency electric arc-rupturing capacity Δ I；
12) judge whether current changing rate is less than high frequency electric arc-rupturing capacity Δ I, be to go to step 5)；It is no, go to step
11)；
Above step is performed, until simulation time terminates.
The present invention is using the value I that damscWith high frequency electric arc-rupturing capacity Δ I as the condition for judging breaker disjunction, use
Fracture medium recovery strength UdAs the condition for judging breaker repeated breakdown.
As the supplement of above-mentioned technical proposal, the described value I that damscIt is set as being uniformly distributed in the random of section [2,3] A
Function.
As the supplement of above-mentioned technical proposal, breaker breakdown conducting is made using resume combustion and repeated breakdown.
As the supplement of above-mentioned technical proposal, the fracture dielectric insulation recovery strength U of vacuum circuit breakerdDuring with contact disjunction
Between t be fitted to：
Ud=36.8t0.825。
As the supplement of above-mentioned technical proposal, the fracture dielectric insulation recovery strength U of SF6 breakersdDuring with contact disjunction
Between t be fitted to：
Ud=25t1.6。
As the supplement of above-mentioned technical proposal, described high frequency electric arc-rupturing capacity Δ I span is 50~300A/
μs。
As the supplement of above-mentioned technical proposal, in step 10), breaker breakdown conducting is made using resume combustion and repeated breakdown.
It is a further object of the present invention to provide a kind of breaker analogue system for cut-offfing perceptual low current, including：
Modeling unit：Using the value I that damsc, fracture medium recovery strength UdWith high frequency electric arc-rupturing capacity Δ I three elements structures
Build breaker model；
Value of damming generation unit：It is random to generate the value I that damsc；
First waits unit：Breaker is waited to receive separating brake instruction；
First judging unit：Judge whether breaker receives separating brake instruction, gone at the second wait unit
Reason；It is no, go to the first wait unit and handled
Second waits unit：Current absolute value is waited to be less than the value I that damsc；
Second judging unit：Judge whether current absolute value is less than the value I that damsc, it is to go to the progress of breaker disjunction unit
Processing；It is no, go to the second wait unit and handled；
Breaker disjunction unit：For breaker disjunction；
3rd waits unit：Wait fracture medium recovery strength UdLess than fracture transient recovery voltage Ut；
3rd judging unit：Judge fracture medium recovery strength UdWhether fracture transient recovery voltage U is less thant, it is to go to
Breakdown onunit is handled；It is no, go to the 3rd wait unit and handled；
Puncture onunit：Puncture for breaker and turn on；
4th waits unit：Current changing rate is waited to be less than high frequency electric arc-rupturing capacity Δ I；
4th judging unit：Judge whether current changing rate is less than high frequency electric arc-rupturing capacity Δ I, be to go to second etc.
Treat that unit is handled；It is no, go to the 4th wait unit and handled.
The invention has the advantages that：The present invention applies PSCAD Transient State Simulation Softwares, it is proposed that using value of damming
Ic, fracture medium recovery strength UdWith the breaker model of high frequency electric arc-rupturing capacity Δ I three elements structure, it can simulate and cut-off
The transition effects such as breaker during perceptual low current dams, resume combustion, repeated breakdown.The present invention solves 35kV power systems and cut-off simultaneously
The evaluation problem of switching overvoltage when joining reactor, it can provide and build for the selection of Overvoltage suppressing measure and follow-up transformation
View, the safe and reliable operation for improving power system are horizontal.
Brief description of the drawings
Fig. 1 is the execution flow chart of breaker model of the present invention；
Fig. 2 is the illustraton of model (T of breaker of the present inventionbFor opening time；I is the electric current by breaker；U is breaker
Both end voltage, it is transient recovery voltage U in breaker disjunctiont；B is the amount of logic of instruction circuit-breaker status, and 1 is disjunction, 0
To close)；
Fig. 3 is breaker dielectric insulation recovery curve figure of the present invention；
Fig. 4,5 are respectively that the present invention cut-offs shunt reactor transient voltage, electric current typical plot.
Embodiment
With reference to specification drawings and specific embodiments, the invention will be further described.
Embodiment 1
The present embodiment provides a kind of breaker emulation mode for cut-offfing perceptual low current, and it comprises the following steps, as schemed institute
Show：
1) using the value I that damsc, fracture medium recovery strength UdBreaker is built with high frequency electric arc-rupturing capacity Δ I three elements
Model, as shown in Figure 1,3；
2) it is random to generate the value I that damsc；
3) breaker is waited to receive separating brake instruction；
4) judge whether breaker receives separating brake instruction, be to go to step 5)；It is no, go to step 3)；
5) current absolute value is waited to be less than the value I that damsc；
6) judge whether current absolute value is less than the value I that damsc, it is to go to step 7)；It is no, go to step 5)；
7) breaker disjunction；
8) fracture medium recovery strength U is waiteddLess than fracture transient recovery voltage Ut；
9) fracture medium recovery strength U is judgeddWhether fracture transient recovery voltage U is less thant, it is to go to step 10)；It is no, turn
Step 8)；
10) breaker breakdown conducting；
11) current changing rate is waited to be less than high frequency electric arc-rupturing capacity Δ I；
12) judge whether current changing rate is less than high frequency electric arc-rupturing capacity Δ I, be to go to step 5)；It is no, go to step
11)；
Above step is performed, until simulation time terminates.
The parameter and pertinent literature that producer provides show that it is small that 35kV vacuum circuit breakers cut-off shunt reactor power frequency value of damming
In 5A, mostly between 2~3A, therefore power frequency value of damming is set as being uniformly distributed letter in the random of section [2,3] A in simulations
Number.Actually 5A and following power frequency dam value on simulation result influence it is minimum, can ignore.It is existing for SF6 breakers
Product value of damming also generally is less than 5A, therefore makees same set with vacuum circuit breaker.
Ability and electric current current changing rate (di/dt) null value near of the vacuum circuit breaker to high frequency electric zero passage blow-out
Correlation, di/dt could successfully be cut-off less than the electric current of certain numerical value only near current zero, and the value is referred to as high frequency electric
Arc-rupturing capacity Δ I, its span is in 50~300A/ μ s.
Vacuum interrupter dielectric strength shows according to shunt reactor is cut-off to 35kV vacuum circuit breakers in 20~50kV/mm
Field actual measurement and test data in lab, dielectric insulation recovery strength statistics of features value is in 25kV/mm or so, 35kV vacuum circuit breakers
Opening velocity in 1.6m/s or so.In simulations, 35kV vacuum circuit breakers dielectric insulation recovery characteristics and contact break t
It is fitted to
Ud=36.8t0.825
Measured data in document, the dielectric insulation recovery strength of SF6 breaker arc gaps are arranged in simulations
Ud=25t1.6
The dielectric insulation recovery strength curve of vacuum circuit breaker and SF6 breakers is shown in Fig. 4.
Embodiment 2
The present embodiment provides a kind of breaker analogue system for cut-offfing perceptual low current, including：
Modeling unit：Using the value I that damsc, fracture medium recovery strength UdWith high frequency electric arc-rupturing capacity Δ I three elements structures
Build breaker model；
Value of damming generation unit：It is random to generate the value I that damsc；
First waits unit：Breaker is waited to receive separating brake instruction；
First judging unit：Judge whether breaker receives separating brake instruction, gone at the second wait unit
Reason；It is no, go to the first wait unit and handled
Second waits unit：Current absolute value is waited to be less than the value I that damsc；
Second judging unit：Judge whether current absolute value is less than the value I that damsc, it is to go to the progress of breaker disjunction unit
Processing；It is no, go to the second wait unit and handled；
Breaker disjunction unit：For breaker disjunction；
3rd waits unit：Wait fracture medium recovery strength UdLess than fracture transient recovery voltage Ut；
3rd judging unit：Judge fracture medium recovery strength UdWhether fracture transient recovery voltage U is less thant, it is to go to
Breakdown onunit is handled；It is no, go to the 3rd wait unit and handled；
Puncture onunit：Puncture for breaker and turn on；
4th waits unit：Current changing rate is waited to be less than high frequency electric arc-rupturing capacity Δ I；
4th judging unit：Judge whether current changing rate is less than high frequency electric arc-rupturing capacity Δ I, be to go to second etc.
Treat that unit is handled；It is no, go to the 4th wait unit and handled.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. a kind of breaker emulation mode for cut-offfing perceptual low current, it comprises the following steps：
1) using the value I that damsc, fracture medium recovery strength UdBreaker mould is built with high frequency electric arc-rupturing capacity Δ I three elements
Type；
2) it is random to generate the value I that damsc；
3) breaker is waited to receive separating brake instruction；
4) judge whether breaker receives separating brake instruction, be to go to step 5)；It is no, go to step 3)；
5) current absolute value is waited to be less than the value I that damsc；
6) judge whether current absolute value is less than the value I that damsc, it is to go to step 7)；It is no, go to step 5)；
7) breaker disjunction；
8) fracture medium recovery strength U is waiteddLess than fracture transient recovery voltage Ut；
9) fracture medium recovery strength U is judgeddWhether fracture transient recovery voltage U is less thant, it is to go to step 10)；It is no, go to step
8)；
10) breaker breakdown conducting；
11) current changing rate is waited to be less than high frequency electric arc-rupturing capacity Δ I；
12) judge whether current changing rate is less than high frequency electric arc-rupturing capacity Δ I, be to go to step 5)；It is no, go to step 11)；
Above step is performed, until simulation time terminates.
2. breaker emulation mode according to claim 1, it is characterised in that the described value I that damscIt is set as in section
[2,3] A random uniformly distributed function.
3. breaker emulation mode according to claim 1 or 2, it is characterised in that the fracture medium of vacuum circuit breaker is exhausted
Edge recovery strength UdIt is fitted to contact break t：
Ud=36.8t0.825。
4. breaker emulation mode according to claim 1 or 2, it is characterised in that the fracture dielectric insulation of SF6 breakers
Recovery strength UdIt is fitted to contact break t：
Ud=25t1.6。
5. breaker emulation mode according to claim 1 or 2, it is characterised in that described high frequency electric arc-rupturing capacity
Δ I span is 50~300A/ μ s.
6. breaker emulation mode according to claim 1 or 2, it is characterised in that in step 10), using resume combustion and again
Breakdown makes breaker breakdown conducting.
7. a kind of breaker analogue system for cut-offfing perceptual low current, including：
Modeling unit：Using the value I that damsc, fracture medium recovery strength UdIt is disconnected with high frequency electric arc-rupturing capacity Δ I three elements structure
Road device model；
Value of damming generation unit：It is random to generate the value I that damsc；
First waits unit：Breaker is waited to receive separating brake instruction；
First judging unit：Judge whether breaker receives separating brake instruction, be to go to the second wait unit to be handled；It is no,
The first wait unit is gone to be handled
Second waits unit：Current absolute value is waited to be less than the value I that damsc；
Second judging unit：Judge whether current absolute value is less than the value I that damsc, it is to go to breaker disjunction unit to be handled；
It is no, go to the second wait unit and handled；
Breaker disjunction unit：For breaker disjunction；
3rd waits unit：Wait fracture medium recovery strength UdLess than fracture transient recovery voltage Ut；
3rd judging unit：Judge fracture medium recovery strength UdWhether fracture transient recovery voltage U is less thant, it is to go to breakdown
Onunit is handled；It is no, go to the 3rd wait unit and handled；
Puncture onunit：Puncture for breaker and turn on；
4th waits unit：Current changing rate is waited to be less than high frequency electric arc-rupturing capacity Δ I；
4th judging unit：Judge whether current changing rate is less than high frequency electric arc-rupturing capacity Δ I, be to go to the second wait list
Member is handled；It is no, go to the 4th wait unit and handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970438.6A CN107844638A (en) | 2017-10-16 | 2017-10-16 | A kind of breaker emulation mode and system for cut-offfing perceptual low current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970438.6A CN107844638A (en) | 2017-10-16 | 2017-10-16 | A kind of breaker emulation mode and system for cut-offfing perceptual low current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107844638A true CN107844638A (en) | 2018-03-27 |
Family
ID=61662592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710970438.6A Pending CN107844638A (en) | 2017-10-16 | 2017-10-16 | A kind of breaker emulation mode and system for cut-offfing perceptual low current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107844638A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007308A (en) * | 2019-12-28 | 2020-04-14 | 广东电网有限责任公司电力科学研究院 | Overvoltage monitoring method, device and equipment |
| CN112836345A (en) * | 2021-01-07 | 2021-05-25 | 云南电网有限责任公司电力科学研究院 | Overvoltage simulation method for switching reactor of circuit breaker |
| CN113533950A (en) * | 2021-06-11 | 2021-10-22 | 国网浙江省电力有限公司嘉兴供电公司 | BiLSTM-based high-voltage circuit breaker operating voltage sampling method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106529084A (en) * | 2016-12-05 | 2017-03-22 | 华南理工大学 | Construction method for vacuum circuit breaker switch-on transient state simulation model |
| 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 |
-
2017
- 2017-10-16 CN CN201710970438.6A patent/CN107844638A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106529084A (en) * | 2016-12-05 | 2017-03-22 | 华南理工大学 | Construction method for vacuum circuit breaker switch-on transient state simulation model |
| 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 |
Non-Patent Citations (3)
| Title |
|---|
| J.HELMER ET AL: ""Mathematical Modeling of the High fiequency Behavior of Vacuum Interrupters and Comparision with Measured Transients in Power Systems"", 《XVIITH INTERNATIONAL SYMPOSIUM ON DISCHARGES & ELECTRICAL INSULATION IN VACUUM1996》 * |
| M.POPOV ET AL: ""COMPARISON OF TWO VACUUM CIRCUIT BREAKER ARC MODELS"", 《INTERNATIONAL SYMPOSIUM ON DISCHARGES & ELECTRICAL INSULATION IN VACUUM2000》 * |
| 彭庆军 等: ""真空断路器开断35 kV并联电抗器的三相建模仿真与过电压抑制研究"", 《高压电器》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007308A (en) * | 2019-12-28 | 2020-04-14 | 广东电网有限责任公司电力科学研究院 | Overvoltage monitoring method, device and equipment |
| CN111007308B (en) * | 2019-12-28 | 2022-02-15 | 广东电网有限责任公司电力科学研究院 | Overvoltage monitoring method, device and equipment |
| CN112836345A (en) * | 2021-01-07 | 2021-05-25 | 云南电网有限责任公司电力科学研究院 | Overvoltage simulation method for switching reactor of circuit breaker |
| CN113533950A (en) * | 2021-06-11 | 2021-10-22 | 国网浙江省电力有限公司嘉兴供电公司 | BiLSTM-based high-voltage circuit breaker operating voltage sampling method |
| CN113533950B (en) * | 2021-06-11 | 2023-12-26 | 国网浙江省电力有限公司嘉兴供电公司 | BiLSTM-based high-voltage circuit breaker operation voltage sampling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102820643B (en) | High voltage direct current power transmission line protection method based on voltage and current mutation direction | |
| CN102508081B (en) | Distribution network fault simulating method and device and distribution network system | |
| CN104217634B (en) | Distribution true-value simulation test method | |
| CN107844638A (en) | A kind of breaker emulation mode and system for cut-offfing perceptual low current | |
| CN108336720B (en) | Single-phase earthing traveling-wave protection method and device and computer equipment | |
| CN203276027U (en) | Digital dynamic closed-loop test system of electricity smooth and steady supply device | |
| Abdulahovic et al. | Vacuum circuit-breaker parameter calculation and modelling for power system transient studies | |
| CN105207186A (en) | Distance protection method for power transmission line containing unified power flow controller | |
| Monadi et al. | Design and real-time implementation of a PMU-based adaptive auto-reclosing scheme for distribution networks | |
| CN107064677A (en) | A kind of method for differentiating transmission line lightning stroke flashover and non-flashover | |
| CN103280776A (en) | Method for preventing incorrect operation of differential protection device | |
| CN106655110A (en) | Bus protection method based on fault current wavelet decomposition transient energy | |
| CN103310078B (en) | Automatic modeling analysis method for over-voltage level of switching reactor of vacuum circuit breaker | |
| CN112165078A (en) | Resonant current limiter input control method utilizing short-circuit current change rate | |
| CN101216525B (en) | Insulator chain lightning withstand level emulation method | |
| CN104505813A (en) | Power transmission line pilot protection method for simulation-after-test by using instantaneous power under Bergeron circuit model | |
| Filipović-Grčić et al. | Analysis of transient recovery voltage in 400 kV SF6 circuit breaker due to transmission line faults | |
| CN201819973U (en) | Device for making test of high-voltage circuit breaker | |
| CN207081816U (en) | Study the device of pressure and the fast relation of oil in load ratio bridging switch handoff procedure | |
| CN103532112B (en) | Direct-current differential protection method for sectional type valve bank | |
| CN103854711A (en) | Method for analyzing turn-off time performance of shut-down circuit breaker of reactor | |
| CN107180124A (en) | Consider that vacuum circuit breaker is restriked the modeling and simulation method of characteristic | |
| Rustemlı et al. | Analysis and simulation of single phase-to-ground short circuit fault in Van 154 kV substation: An experimental assessment | |
| CN115980558A (en) | Synthetic test loop | |
| JP2007185011A (en) | Fault point locator and locating method of gas insulated switchgear |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180327 |
|
| RJ01 | Rejection of invention patent application after publication |