CN109842101A - The over-voltage protection method and device of half-wavelength ac transmission dynamic simulator system - Google Patents
The over-voltage protection method and device of half-wavelength ac transmission dynamic simulator system Download PDFInfo
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Abstract
The present invention proposes the over-voltage protection method and device of a kind of half-wavelength ac transmission dynamic simulator system, comprising: by the voltage of protective position in acquisition half-wavelength ac transmission dynamic simulator system；Based on preset two-period form overvoltage protection setting principle, two-period form overvoltage protection definite value is adjusted；Based on two-period form overvoltage protection definite value and by the voltage of protective position, overvoltage protection strategy is executed.The two-period form over-voltage protection method that the present invention uses, the overvoltage damage analog element equipment that can prevent half-wavelength dynamic simulation test process from occurring, and MOA aerial drainage overlong time is avoided, protect MOA not breakdown.
Description
Technical field
The present invention relates to electric system simulation simulation fields, and in particular to a kind of half-wavelength ac transmission dynamic simulator system
Over-voltage protection method and device.
Background technique
It is energy it is well known that causing power supply area to be often spaced with electricity consumption region distant due to uneven geographical distribution of resources
The problems such as better solving the energy and be unevenly distributed problem, overlength distance and super large conveying appearance scape technology of transmission of electricity need to be solved.
In recent years, the electrical energy transportation technology of being continuously increased with electricity demand, overlength distance and super high power and its
Implement, worldwide there is significant economic significance and practical value, becomes an important directions of world power development.
Half-wavelength UHV AC transmission technique refers to the electrical distance of transmission of electricity close to a power frequency half-wave, i.e., about 3000km (50Hz) or 2600km
The three-phase alternating current technology of transmission of electricity of the overlength distance of (60Hz).The advantages of half-wavelength UHV AC transmission technique first is that half-wavelength exchange it is defeated
The power factor of electric line is high, and in the case where transmission distance is equal to or slightly greater than half-wavelength, structure is more possible than any
Overlength distance AC and DC transmission system is all more simple；Furthermore when the manufacture of ac transmission equipment than current converter introduction and
It is the maintenance more daylight saving time, preferably to use half-wavelength UHV AC transmission technique.
There are no the experiences of engineering practice so far for half-wavelength UHV AC transmission technique, by building half-wavelength exchange in laboratory
Characteristic research and related protection test to half-wavelength AC transmission system may be implemented in transmission of electricity dynamic simulator system.But due to
Half-wavelength transmission line of alternation current have with some completely different characteristics of common long transmission line, half wavelength line surge characteristic and often
There is bigger difference on gage line road, and when taking no action to, very high overvoltage can be generated under ground fault condition, is furthermore being operated normally
When transmission power increase can also working voltage be caused to increase.
Accordingly, it is desirable to provide a kind of technology is simulated come the overvoltage damage for preventing half-wavelength dynamic simulation test process from occurring
Element and equipment.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of overvoltage protection sides of half-wavelength ac transmission dynamic simulator system
Method and device.
A kind of over-voltage protection method of half-wavelength ac transmission dynamic simulator system, comprising: acquisition half-wavelength exchange is defeated
By the voltage of protective position in electro dynamic simulation system；Based on preset two-period form overvoltage protection setting principle, two sections are adjusted
Formula overvoltage protection definite value；Based on two-period form overvoltage protection definite value and by the voltage of protective position, overvoltage protection plan is executed
Slightly.
Based on preset two-period form overvoltage protection principle, adjusting two-period form overvoltage protection definite value includes: I section of over-voltage
Protect fixed value adjusting and II section of overvoltage of protection fixed value adjusting；I section of over-voltage of protection fixed value adjusting includes: I section of over-voltage of setting
Protection definite value be greater than metal oxide arrester limitation voltage, and be less than the resistance to voltage levels of system equipment；II section of overvoltage
Protection fixed value adjusting include: set over-voltage II section protection definite value less than metal oxide arrester limitation voltage.
Based on two-period form overvoltage protection definite value and by the voltage of protective position, executing overvoltage protection strategy includes:
When being reached I section of over-voltage of protection definite value by the voltage of protective position, overvoltage protection movement；Or when by the voltage of protective position
When reaching II section of over-voltage of protection definite value, after the preset time that is delayed, overvoltage protection movement；The preset time that is delayed, which is pressed, is less than gold
Belong to the longest turn-on time of Oxide Arrester to set.
The calculation formula of I section of over-voltage of protection definite value is as follows:
Udz1=Krel1Ur；
Udz1For I section of over-voltage of protection definite value, I section of over-voltage of safety factor Krel1=1.05~1.1, UrFor metal oxide
The limitation voltage of arrester.
The calculation formula of II section of over-voltage of protection definite value is as follows:
Udz2=Krel2UrAnd Δ t < tmax；
Udz2For II section of over-voltage of protection definite value, II section of over-voltage of safety factor Krel2=0.9~0.95, UrFor metal oxidation
The limitation voltage of object arrester, the delay preset time that Δ t is II section of over-voltage, tmaxIt is led for the longest of metal oxide arrester
The logical time.
A kind of overvoltage protection of half-wavelength ac transmission dynamic simulator system comprising: voltage sample module is used
By the voltage of protective position in acquisition half-wavelength ac transmission dynamic simulator system；Overvoltage protection fixed value adjusting module is used
In being based on preset two-period form overvoltage protection setting principle, two-period form overvoltage protection definite value is adjusted；Overvoltage protection strategy
Execution module, for executing overvoltage protection strategy based on two-period form overvoltage protection definite value and by the voltage of protective position.
Overvoltage protection fixed value adjusting module, comprising: I section of protection fixed value adjusting submodule of over-voltage and II section of overvoltage protection
Fixed value adjusting submodule；I section of protection fixed value adjusting submodule of over-voltage, the protection definite value for setting I section of over-voltage are greater than metal oxygen
The limitation voltage of compound arrester, and it is less than the resistance to voltage levels of system equipment；II section of protection fixed value adjusting submodule of overvoltage is used
It is less than the limitation voltage of metal oxide arrester in over-voltage II sections of setting of protection definite value.
Overvoltage protection policy enforcement module, comprising: II section of Preservation tactics of I section of Preservation tactics submodule of over-voltage and over-voltage
Module；I section of Preservation tactics submodule of over-voltage, it is excessively electric for when being reached I section of over-voltage of protection definite value by the voltage of protective position
Press protection act；II section of Preservation tactics submodule of over-voltage is determined for working as by the protection that the voltage of protective position reaches II section of over-voltage
When value, after the preset time that is delayed, overvoltage protection movement；The preset time that is delayed presses the longest less than metal oxide arrester
Turn-on time is set.
I section of over-voltage of protection definite value Udz1=Krel1Ur；
Udz1For I section of over-voltage of protection definite value, I section of over-voltage of safety factor Krel1=1.05~1.1, UrFor metal oxide
The limitation voltage of arrester.
II section of over-voltage of protection definite value Udz2=Krel2UrAnd Δ t < tmax；
Udz2For II section of over-voltage of protection definite value, II section of over-voltage of safety factor Krel2=0.9~0.95, UrFor metal oxidation
The limitation voltage of object arrester, the delay preset time that Δ t is II section of over-voltage, tmaxIt is led for the longest of metal oxide arrester
The logical time.
Compared with the latest prior art, technical solution provided by the invention has the advantages that
1, the two-period form overvoltage protection definite value and overvoltage protection strategy that the method for the present invention uses, when can prevent long
Between overvoltage, avoid MOA aerial drainage overlong time, protect MOA not breakdown；
2, the overvoltage damage that over-voltage protection method of the invention can prevent half-wavelength dynamic simulation test process from occurring
Evil analog element equipment, so that the safety and stability of safeguards system each section component equipment and half-wavelength dynamic analog total system is transported
Row verifies and to half-wavelength ac transmission relay protection the compatibility test of the protection of existing principle and new principle protection to carry out
The detection of device provides strong support；
3, method of the invention is simple and reliable, and practicability is stronger, being capable of reliably protecting half-wavelength exchange bookstore's dynamic analog
System safe and stable operation promotes the efficiency of half-wavelength ac transmission dynamic analog specificity analysis and verification test work.
Detailed description of the invention
Fig. 1 is design cycle block diagram of the invention；
Fig. 2 is dynamic simulator system figure of the invention；
BKT- line switching, FD- fault simulation unit, 3W- Infinite bus system physical analogy unit in Fig. 2.
Specific embodiment
The embodiment of the present invention is described further with reference to the accompanying drawing:
As shown in Figure 1, to achieve the above object, method provided by the invention adopts the following technical scheme that:
It acquires in half-wavelength ac transmission dynamic simulator system by the voltage of protective position；
Based on preset two-period form overvoltage protection setting principle, two-period form overvoltage protection definite value is adjusted；
Based on two-period form overvoltage protection definite value and by the voltage of protective position, overvoltage protection strategy is executed.
As shown in Fig. 2, half-wavelength ac transmission dynamic simulator system may include: tetra- generators of 3G, 4G, 6G, 11G
Group, equivalent generating set physical analogy unit, Infinite bus system physical analogy unit 3W, transformer physical analogy unit 12FB,
Half-wavelength transmission line of alternation current physical analogy unit, metal oxide arrester analogue unit MOA, current transformer physical analogy
Unit group CT, fault simulation unit F D and line switching BKT, oscillograph unit and console.
Wherein, equivalent generating set physical analogy unit may include: hydraulic turbine analog controller/steam turbine simulation control
Device, prime mover, step-up transformer, grid-connected switch, current transformer, voltage transformer and excitation unit.Half-wavelength ac transmission
Route physical analogy unit may include: fault simulation unit and line switching.Metal oxide arrester MOA analogue unit can
The power-frequency overvoltage occurred in limitation system, arrangement can follow the principle that both ends are sparse, centre is intensive.Metal oxide
Arrester (MOA) is limited by self-capacity, and turn-on time may not exceed certain threshold value, otherwise, it will leads to MOA breakdown damage
It is bad.Fault simulation unit may include: abort situation switch, breakdown switch and phase-selecting switch.Fault simulation unit can be set
Simulated failure point, the electric fault that dynamic simulator system occurs in simulating grid at the simulated failure point.Electric fault can wrap
Include: singlephase earth fault, phase fault, double earthfault, three phase short circuit fault and three-phase ground failure etc. are specifically set
Meter process is as follows:
1, dynamic analogue element parameter designing；
Dynamic analogue element parameter designing includes the design of analog line element, simulation metal oxide arrester and simulation electricity
Vessel Design design, specific design are as follows:
1) analog line element
For accurate simulation extra-high voltage half-wavelength AC transmission system line parameter circuit value, using the element of copper conductor air core coil,
Extract the mode of different impedance taps out.Since impedance angle is higher, the specific gravity that connection resistance accounts for will increase, the impedance of element itself
Angle must certain nargin higher than line impedance angle, just can determine that the needs for meeting actual parameter.Reactor pattern uses dry type
With annular air-core inductance, coil is made of two the number of turns, tap and the identical hollow line cake of size.Two line cakes both may be used
Series connection again can parallel operation.
2) metal oxide arrester is simulated
Power-frequency overvoltage when for limiting circuitry failure prevents equipment from damaging because of overvoltage.It need to be in transmission line simulation
Install 10 groups of metal oxide arrester (MOA) analog elements in outlet and along the line, arrangement follow both ends it is sparse, 200~
1700km intensive principle, respectively distance outlet 500KM, 700KM, 900KM, 1000KM, 1100KM, 1300KM, 1500KM,
2200KM and 3000KM.
3) analog capacitor
By can be realized the standard to line capacitance in the suitable direct-to-ground capacitance device of each circuit element two sides configuration parameter
Really simulation is established extra-high voltage half-wavelength ac transmission moving die system and is needed according to the customized special electricity of actual transmission line parameter
Container.Simultaneously as the overvoltage level at route midpoint may be up to volume when half-wavelength transmission line of alternation current both ends are broken down
5-6 times of constant voltage need to properly increase the resistance to voltage levels of capacitor group, selected capacitor for the safe operation for guaranteeing experimental facilities
Device voltage rating is AC 4000V；Rated capacity is 0.85/0.2/5.429 μ F.
By can be realized the accurate mould to line capacitance in the suitable capacitor of each circuit element two sides configuration parameter
It is quasi-, it establishes extra-high voltage half-wavelength ac transmission moving die system and needs according to the customized special capacitor of actual transmission line parameter
Device.Simultaneously as the overvoltage level at route midpoint may be up to specified when half-wavelength transmission line of alternation current both ends are broken down
5-6 times of voltage need to properly increase the resistance to voltage levels of capacitor group, selected capacitor for the safe operation for guaranteeing experimental facilities
Voltage rating is AC 4000V；Rated capacity is 0.85/0.2/5.429 μ F.
2. the design of half-wavelength ac transmission dynamic analog parameter
The electrical structure and system parameter for collecting and surveying half-wavelength transmission line of alternation current are suitable by practice and analysis setting
Simulation ratio, positive sequence impedance, zero sequence impedance, distribution capacity and the metallic oxide for calculating simulation system " Π " unit keep away
The analog parameter of thunder device.
1) the extra-high voltage half wavelength line prototype parameter designed includes: the design of positive sequence element and zero sequence component design；
(1) positive sequence impedance X1, positive sequence resistance R1, positive sequence impedance angle φ1；
(2) zero-sequence reactance X0, zero sequence resistance R0, zero sequence impedance angle φ0；
(3) positive sequence distribution capacity C1, zero sequence distribution capacity C0；
(4) the ratio between current transformer two sides conversion electric current, CT no-load voltage ratio KCT；The ratio between the voltage of voltage transformer two sides, PT become
Compare KPT；
(5) voltage rating U, rated current I.
2) simulation is than selection
By practice with analysis shows, simulation is than value as the following formula:
(1) voltage ratio mu=U/1.5；
(2) electric current ratio mI=I/5；
(3) capacity ratio mS=mu·mI；
(4) impedance ratio mZ=mu/mI。
3) computation model parameter
Setup algorithm circuit model parameter as the following formula:
(1) positive sequence impedance:
X1M=X1×L÷mZ
R1M≤R1×L÷mZ
(2) zero sequence impedance:
X0M=X0×L÷mZ
R0M≤R0×L÷mZ
(3) distribution capacity:
C1M=C1×L×mZ
C0M=C0×L×mZ
(4) metal oxide arrester
Continuous running voltage:
Maximum residual voltage is less than 1.4U under switching impulse current 0.1kA, and L is the simulated range of circuit model.
Half-wavelength ac transmission dynamic simulator system includes: equivalent generating set physical analogy unit, Infinite bus system object
It is lightning-arrest to manage analogue unit 3W, transformer physical analogy unit, half-wavelength transmission line of alternation current physical analogy unit, metal oxide
Device analogue unit, current transformer physical analogy unit group, oscillograph unit and console, generator analogue unit pass through route
Analogue unit connects power grid analogue unit.
3, the wiring design of simulation system
Generator analogue unit includes: hydraulic turbine analog controller/steam turbine analog controller, prime mover, boosting transformation
Device, grid-connected switch, current transformer, voltage transformer and excitation unit.
Line simulation unit includes: fault simulation unit F D and line switching BKT.
Fault simulation unit F D includes: abort situation switch, breakdown switch and phase-selecting switch.
The operation characteristic and fault signature of dynamic simulator system simulation half-wavelength AC transmission system.
Simulated failure point is arranged in fault simulation unit F D, and dynamic simulator system occurs in simulating grid at the simulated failure point
Electric fault.
Electric fault includes: singlephase earth fault, phase fault, double earthfault, three phase short circuit fault and three
Phase ground fault.
Half-wavelength ac transmission dynamic simulator system is completed to voltage and electricity along half wavelength line under different operating conditions
The research for flowing steady-state characteristic, verifies the electrical characteristics such as half wavelength line transient overvoltage and transient rotor angle stability, studies
The adaptability to the protection of existing principle and new principle protection is carried out in influence of the fault point spatial position to failure electric characteristic difference
Verification experimental verification realizes the detection to half-wavelength ac transmission protective relaying device and system safety and stability control device.
When half-wavelength dynamic simulator system simulates generation electric fault at simulated failure point, power frequency mistake will occur in system
Voltage.When simulated failure point is located at the position away from head end 75%~90%, line simulation unit is excessively electric along the line after failure occurs
System overvoltage highest point is located at away from 25%~40% position of head end after pressing highest, failure to occur.
Overvoltage protection can avoid prolonged over-voltage breakdown MOA occur during test and further in damage system
Other equipment components, under fault condition, overvoltage protection is in half-wavelength AC transmission system overvoltage most serious
At the position 1000km~1500km, half-wavelength ac transmission dynamic simulator system overvoltage protection is carried out by overvoltage protection control word
Function investment.The voltage of overvoltage protection is taken respectively from each three-phase voltage U by protection pointan, Ubn, Ucn, set overvoltage protection plan
Slightly include:
Overvoltage protection acts outlet logic: a) any voltage Uab、UbcOr UacGreater than protection definite value；B) line switching is (disconnected
Road device) in coincidence；C) meet protection delay time (can be zero).
That is, can be adjusted when overvoltage protection control word is the half wave line line switching of " 1 " and protective position in coincidence
Actuation time Δ t when meeting operation condition, protection exit tripping half wave line way switch.
The over-voltage protection method of half-wavelength ac transmission dynamic simulator system specifically uses two-period form overvoltage protection,
Include: I section of over-voltage and II section of two kinds of situation of over-voltage:
1) by protecting system equipment not receive voltage damages adjusting, protection definite value presses the limitation electricity higher than MOA for I section of over-voltage
Pressure, lower than system equipment resistance to voltage levels when adjust, snap action；
When being reached I section of over-voltage of protection definite value by the voltage of protective position, the overvoltage protection installed in the position is dynamic
Make the breaker tripping of route two sides.
Wherein, I section of protection definite value U of over-voltagedz1=Krel1UrIn formula, safety factor Krel1=1.05~1.1；
When reaching protection definite value by the voltage of protective position, the overvoltage protection installed in the position can open immediately
It is dynamic, complete outlet tripping.
2) it is adjusted by MOA conducting for a long time is avoided for II section of over-voltage, prevents overvoltage overlong time from MOA being caused to puncture, mistake
II section of voltage of protection definite value limits voltage lower than MOA, and with certain action delay；
When being reached II section of over-voltage of protection definite value by the voltage of protective position, after action delay Δ t, protection starts out
Mouth tripping, action delay Δ t are set by the longest turn-on time less than MOA；
Wherein, II section of protection definite value U of over-voltagedz2=Krel2Ur, in formula, safety factor: Krel2=0.9~0.95；
Action delay Δ t < tmax, tmaxFor the longest turn-on time of MOA.
I section of over-voltage when voltage is greater than the resistance to voltage levels of MOA can snap action, during preventing system equipment from being tested
The damage for the overvoltage being likely to occur.II section of over-voltage is adjusted by the pressure limiting level of MOA, and voltage setting valve is smaller compared with I, and
It is mainly to prevent system failure operating status overlong time with certain operation time limit, i.e. action delay Δ t, appearance
Long-time overvoltage makes MOA aerial drainage overlong time, and MOA is caused to puncture.Operation time limit Δ t is greater than the system failure mute time,
Less than the time that MOA allows constant conduction.
Based on the same inventive concept, the present invention also provides a kind of overvoltage protections of half-wavelength ac transmission simulation system
Device is illustrated below.
Device provided by the invention may include:
Voltage sample module, for acquiring in half-wavelength ac transmission dynamic simulator system by the voltage of protective position；
Overvoltage protection fixed value adjusting module, for being based on preset two-period form overvoltage protection setting principle, adjusting two
Segmentation overvoltage protection definite value；
Overvoltage protection policy enforcement module, for based on two-period form overvoltage protection definite value and by the electricity of protective position
Pressure executes overvoltage protection strategy.
Overvoltage protection fixed value adjusting module may include: I section of protection fixed value adjusting submodule of over-voltage and II section of overvoltage
Protect fixed value adjusting submodule；
I section of protection fixed value adjusting submodule of over-voltage, the protection definite value for setting I section of over-voltage are lightning-arrest greater than metal oxide
The limitation voltage of device, and it is less than the resistance to voltage levels of system equipment；
II section of protection fixed value adjusting submodule of overvoltage, the protection definite value for setting II sections of over-voltage are less than metal oxide
The limitation voltage of arrester.
Overvoltage protection policy enforcement module may include: II section of protection plan of I section of Preservation tactics submodule of over-voltage and over-voltage
Slightly submodule；
I section of Preservation tactics submodule of over-voltage, for when being reached I section of over-voltage of protection definite value by the voltage of protective position,
Overvoltage protection movement；
II section of Preservation tactics submodule of over-voltage, for when the protection definite value for being reached II section of over-voltage by the voltage of protective position
When, and after the preset time that is delayed, overvoltage protection movement；
Delay preset time is set by the longest turn-on time for being less than metal oxide arrester.
I section of over-voltage of protection definite value Udz1=Krel1Ur；
Udz1For I section of over-voltage of protection definite value, I section of over-voltage of safety factor Krel1=1.05~1.1, UrFor metal oxide
The limitation voltage of arrester.
II section of over-voltage of protection definite value Udz2=Krel2UrAnd Δ t < tmax；
Udz2For II section of over-voltage of protection definite value, II section of over-voltage of safety factor Krel2=0.9~0.95, UrFor metal oxidation
The limitation voltage of object arrester, the delay preset time that Δ t is II section of over-voltage, tmaxIt is led for the longest of metal oxide arrester
The logical time.
For convenience of description, each section of apparatus described above is divided into various modules with function or unit describes respectively.
Certainly, each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the application.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field can still modify to a specific embodiment of the invention referring to above-described embodiment or
Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement
Within bright claims.
Claims (10)
1. a kind of over-voltage protection method of half-wavelength ac transmission dynamic simulator system characterized by comprising
It acquires in the half-wavelength ac transmission dynamic simulator system by the voltage of protective position；
Based on preset two-period form overvoltage protection setting principle, two-period form overvoltage protection definite value is adjusted；
Based on the two-period form overvoltage protection definite value and the voltage by protective position, overvoltage protection strategy is executed.
2. over-voltage protection method as described in claim 1, which is characterized in that described to be protected based on preset two-period form overvoltage
Principle is protected, adjusts two-period form overvoltage protection definite value, comprising: I section of over-voltage of protection fixed value adjusting and II section of overvoltage of protection
Fixed value adjusting；
The protection fixed value adjusting of I section of the over-voltage includes: that the protection definite value of I section of over-voltage of setting is greater than metal oxide arrester
Voltage is limited, and is less than the resistance to voltage levels of system equipment；
The protection fixed value adjusting of II section of the overvoltage includes: that the protection definite value of over-voltage II sections of setting is lightning-arrest less than metal oxide
The limitation voltage of device.
3. over-voltage protection method as described in claim 1, which is characterized in that described to be based on two-period form overvoltage protection definite value
And the voltage by protective position, execute overvoltage protection strategy, comprising:
When being reached I section of over-voltage of protection definite value by the voltage of protective position, overvoltage protection movement；Or
When being reached II section of over-voltage of protection definite value by the voltage of protective position, and after the preset time that is delayed, overvoltage protection
Movement；
The delay preset time is set by the longest turn-on time for being less than the metal oxide arrester.
4. over-voltage protection method as claimed in claim 2 or claim 3, which is characterized in that the meter of the protection definite value of I section of the over-voltage
It is as follows to calculate formula:
Udz1=Krel1Ur；
Udz1For I section of protection definite value of the over-voltage, the safety factor K of I section of the over-voltagerel1=1.05~1.1, UrFor metal oxygen
The limitation voltage of compound arrester.
5. over-voltage protection method as claimed in claim 2 or claim 3, which is characterized in that the protection definite value of II section of the over-voltage
Calculation formula is as follows:
Udz2=Krel2UrAnd Δ t < tmax；
Udz2For II section of protection definite value of the over-voltage, the safety factor K of II section of the over-voltagerel2=0.9~0.95, UrFor metal
The limitation voltage of Oxide Arrester, Δ t are the delay preset time of II section of the over-voltage, tmaxIt is kept away for the metal oxide
The longest turn-on time of thunder device.
6. a kind of overvoltage protection of half-wavelength ac transmission dynamic simulator system characterized by comprising
Voltage sample module, for acquiring in the half-wavelength ac transmission dynamic simulator system by the voltage of protective position；
Overvoltage protection fixed value adjusting module adjusts two-period form for being based on preset two-period form overvoltage protection setting principle
Overvoltage protection definite value；
Overvoltage protection policy enforcement module, for based on the two-period form overvoltage protection definite value and described by protective position
Voltage executes overvoltage protection strategy.
7. overvoltage protection as claimed in claim 6, which is characterized in that the overvoltage protection fixed value adjusting module,
It include: II section of protection fixed value adjusting submodule of I section of protection fixed value adjusting submodule of over-voltage and overvoltage；
I section of protection fixed value adjusting submodule of the over-voltage, the protection definite value for setting I section of over-voltage are lightning-arrest greater than metal oxide
The limitation voltage of device, and it is less than the resistance to voltage levels of system equipment；
II section of protection fixed value adjusting submodule of the overvoltage, the protection definite value for setting II sections of over-voltage are less than metal oxide
The limitation voltage of arrester.
8. overvoltage protection as claimed in claim 6, which is characterized in that the overvoltage protection policy enforcement module,
It include: II section of Preservation tactics submodule of I section of Preservation tactics submodule of over-voltage and over-voltage；
I section of Preservation tactics submodule of the over-voltage, for when being reached I section of over-voltage of protection definite value by the voltage of protective position,
Overvoltage protection movement；
II section of Preservation tactics submodule of the over-voltage, for when the protection definite value for being reached II section of over-voltage by the voltage of protective position
When, and after the preset time that is delayed, overvoltage protection movement；
The delay preset time is set by the longest turn-on time for being less than the metal oxide arrester.
9. overvoltage protection as claimed in claim 7 or 8, which is characterized in that the protection definite value of I section of the over-voltage
Udz1=Krel1Ur；
Udz1For I section of protection definite value of the over-voltage, the safety factor K of I section of the over-voltagerel1=1.05~1.1, UrFor metal oxygen
The limitation voltage of compound arrester.
10. overvoltage protection as claimed in claim 7 or 8, which is characterized in that the protection definite value of II section of the over-voltage
Udz2=Krel2UrAnd Δ t < tmax；
Udz2For II section of protection definite value of the over-voltage, the safety factor K of II section of the over-voltagerel2=0.9~0.95, UrFor metal
The limitation voltage of Oxide Arrester, Δ t are the delay preset time of II section of the over-voltage, tmaxIt is kept away for the metal oxide
The longest turn-on time of thunder device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932225A (en) * | 2019-10-29 | 2020-03-27 | 中国电力科学研究院有限公司 | Setting method and setting device for overvoltage protection of ultra/extra-high voltage alternating current circuit |
| CN113595076A (en) * | 2021-07-31 | 2021-11-02 | 华北电力大学（保定） | Novel long-distance power transmission method |
| CN113765060A (en) * | 2021-08-05 | 2021-12-07 | 广东云舜综合能源科技有限公司 | Method for setting over-voltage protection and low-voltage protection values of generator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888083A (en) * | 2010-07-23 | 2010-11-17 | 南京国电南自轨道交通工程有限公司 | Protective device for single-phase transformer applicable to traction substation |
| CN102023250A (en) * | 2009-09-22 | 2011-04-20 | 华东电力试验研究院有限公司 | Metal oxide arrester monitoring device |
| CN204334126U (en) * | 2015-01-22 | 2015-05-13 | 南京大全自动化科技有限公司 | The measure and control device of 10kV switching station |
-
2017
- 2017-11-29 CN CN201711222299.5A patent/CN109842101B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023250A (en) * | 2009-09-22 | 2011-04-20 | 华东电力试验研究院有限公司 | Metal oxide arrester monitoring device |
| CN101888083A (en) * | 2010-07-23 | 2010-11-17 | 南京国电南自轨道交通工程有限公司 | Protective device for single-phase transformer applicable to traction substation |
| CN204334126U (en) * | 2015-01-22 | 2015-05-13 | 南京大全自动化科技有限公司 | The measure and control device of 10kV switching station |
Non-Patent Citations (1)
| Title |
|---|
| 张黎等: "半波长输电线路的工频暂态过电压", 《高电压技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932225A (en) * | 2019-10-29 | 2020-03-27 | 中国电力科学研究院有限公司 | Setting method and setting device for overvoltage protection of ultra/extra-high voltage alternating current circuit |
| CN113595076A (en) * | 2021-07-31 | 2021-11-02 | 华北电力大学（保定） | Novel long-distance power transmission method |
| CN113765060A (en) * | 2021-08-05 | 2021-12-07 | 广东云舜综合能源科技有限公司 | Method for setting over-voltage protection and low-voltage protection values of generator |
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