CN108387819A - Overvoltage deciding field method and apparatus along transmission line of alternation current - Google Patents
Overvoltage deciding field method and apparatus along transmission line of alternation current Download PDFInfo
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- CN108387819A CN108387819A CN201810078973.5A CN201810078973A CN108387819A CN 108387819 A CN108387819 A CN 108387819A CN 201810078973 A CN201810078973 A CN 201810078973A CN 108387819 A CN108387819 A CN 108387819A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
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Abstract
The present invention provides overvoltage deciding field method and apparatus, this method along a kind of transmission line of alternation current to include：According to the preset length of the fundamental voltage and electric current, half-wavelength transmission line of alternation current of half-wavelength transmission line of alternation current sending end, obtain the fundamental voltage carry-over factor along the line of half-wavelength transmission line of alternation current, according to fundamental voltage carry-over factor along the line, the minimum position point and maximum position point of the receiving end of fundamental wave overvoltage zone distance half-wavelength transmission line of alternation current, the position in fundamental wave overvoltage section is determined according to minimum position point and maximum position point along obtaining.Overvoltage deciding field method can position overvoltage section along half-wavelength transmission line of alternation current along transmission line of alternation current provided by the invention, solve the problems, such as in the prior art to that can not be accurately located overvoltage section along half-wavelength transmission line of electricity.
Description
Technical field
The present invention relates to half-wavelength transmission line of alternation current Analysis of Steady-State Performance technical fields, and in particular to a kind of ac transmission
Overvoltage deciding field method and apparatus along circuit.
Background technology
National energy distribution is uneven, and west area wind energy, solar energy and water resource are abundant, and load center concentrates on east
Southern Coast city, therefore transmission distance is remote, capacity is big, and half-wave power transmission technology can be used for solving Energy Base and load center
Between remote, extensive, large capacity power Transmission problem.Therefore, extra-high voltage half-wavelength AC transmission system is studied, for
It solves the problems, such as the energy resource structure that China faces at present, there is important scientific value, there are potential application prospects.
In AC transmission system, as the variation of receiving end operating mode will certainly cause to be put in some sections along line voltage
Greatly, or even more serious overvoltage is caused to occur, is unfavorable for economy, the safe operation of transmission system, it is in the prior art extra-high
There is the positioning in overvoltage section along transmission line of alternation current inaccurate in the Analysis of Steady-State Performance for pressing half-wavelength AC transmission system
True problem.Therefore, it is with engineer application that middle overvoltage, which is amplified section and is accurately positioned, along research half-wave power transmission circuit
Value.
Invention content
In view of this, an embodiment of the present invention provides a kind of overvoltage deciding field method along transmission line of alternation current, with
It solves the problems, such as in the prior art to overvoltage section can not be accurately located along half-wavelength transmission line of electricity.
According in a first aspect, an embodiment of the present invention provides overvoltage deciding field sides along a kind of transmission line of alternation current
Method, including：According to the fundamental voltage of half-wavelength transmission line of alternation current sending end and electric current, the half-wavelength transmission line of alternation current it is pre-
If length, the fundamental voltage carry-over factor along the line of half-wavelength transmission line of alternation current is obtained；It is transmitted according to the fundamental voltage along the line
Coefficient, obtain along half-wavelength transmission line of alternation current described in fundamental wave overvoltage zone distance receiving end minimum position point and maximum
Location point；The position in fundamental wave overvoltage section is determined according to the minimum position point and maximum position point.
Through the above steps, the fundamental voltage and electric current and half-wave by half-wavelength transmission line of alternation current sending end are realized
The preset length of long transmission line of alternation current establishes the half-wavelength being made of circuit sending end fundamental voltage and circuit receiving end fundamental voltage
Fundamental voltage carry-over factor along transmission line of alternation current, due to the carry-over factor exchange with overvoltage zone distance half-wavelength it is defeated
The receiving end maximum position point of electric line is related to minimum position point, hence, it can be determined that the maximum position point and minimum position point,
So that it is determined that the position in fundamental wave overvoltage section.It by the above process, can be to excessively electric along half-wavelength transmission line of alternation current
It is positioned, is solved in the prior art to overvoltage section can not be accurately located along half-wavelength transmission line of electricity between pressure area
Problem.
With reference to first aspect, described to be exchanged according to half-wavelength in first aspect first embodiment of the embodiment of the present invention
The fundamental voltage and electric current of transmission line of electricity sending end, the half-wavelength transmission line of alternation current preset length, obtain half-wavelength exchange
Along transmission line of electricity the step of fundamental voltage carry-over factor, including：According to the fundamental wave of half-wavelength transmission line of alternation current sending end electricity
The preset length of pressure and electric current, the half-wavelength transmission line of alternation current obtains the fundamental wave electricity along the line of half-wavelength transmission line of alternation current
Pressure and electric current；According to fundamental voltage and electric current along the half-wavelength transmission line of alternation current, it is defeated to obtain the half-wavelength exchange
Fundamental voltage carry-over factor along electric line.Through the above steps, fundamental wave along half-wavelength transmission line of alternation current is obtained first
Voltage and current can more precisely obtain the receiving end maximum position with overvoltage zone distance half-wavelength transmission line of alternation current
Point and the relevant fundamental voltage carry-over factor of minimum position point.
First embodiment with reference to first aspect, in first aspect second embodiment of the embodiment of the present invention, by with
Lower formula calculates fundamental voltage and the electric current along the line of the half-wavelength transmission line of alternation current：
Wherein,The fundamental voltage and electric current of half-wavelength transmission line of alternation current sending end are indicated respectively；Point
Not Biao Shi half-wavelength transmission line of alternation current along fundamental voltage and electric current；βhIndicate that fundamental phase constant, x are indicated away from half-wavelength
The distance of transmission line of alternation current receiving end, l indicate the preset length of the half-wavelength transmission line of alternation current, ZBIndicate lossless wave resistance
It is anti-, h=1.
Second embodiment with reference to first aspect, in first aspect third embodiment of the embodiment of the present invention, by with
Lower formula calculates the fundamental voltage carry-over factor along the line of the half-wavelength transmission line of alternation current：
Wherein, IphIndicate the real part of the current vector of half-wavelength transmission line of alternation current sending end, IqhIndicate that half-wavelength exchange is defeated
The imaginary part of the current vector of electric line sending end, UshIndicate the voltage scalar value of half-wavelength transmission line of alternation current sending end.
Third embodiment with reference to first aspect, in the 4th embodiment of first aspect of the embodiment of the present invention, according to
Lower formula calculates the minimum position point of the receiving end of half-wavelength transmission line of alternation current described in fundamental wave overvoltage zone distance along described
With maximum position point：
Wherein：
Wherein,IphIndicate the real part of the current vector of half-wavelength transmission line of alternation current sending end, IqhIndicate half
The imaginary part of the current vector of wavelength transmission line of alternation current sending end, IshIndicate the scalar of the electric current of half-wavelength transmission line of alternation current sending end
Value, ZBIndicate lossless wave impedance, h=1, k indicate along fundamental voltage carry-over factor.
With reference to first aspect, described according to the minimum bit in the 5th embodiment of first aspect of the embodiment of the present invention
It sets a little and maximum position point determines that the position in fundamental wave overvoltage section includes：Judge the half-wavelength transmission line of alternation current
Whether physical length is consistent with the preset length；When the physical length and the preset length one of half-wavelength transmission line of alternation current
When cause, judge that the maximum position and the minimum position are the positions in fundamental wave overvoltage section.In practical applications, half-wavelength
The physical length of transmission line of alternation current may have the phenomenon inconsistent with preset length, only in half-wavelength AC power line
When the physical length on road is consistent with preset length, fundamental wave overvoltage section is exactly the maximum position that above-mentioned specific implementation mode obtains
The section of point and minimum position point composition.
5th embodiment with reference to first aspect works as half-wave in first aspect sixth embodiment of the embodiment of the present invention
When the physical length of long transmission line of alternation current and the inconsistent preset length of the half-wavelength transmission line of alternation current, described in judgement most
Big location point and minimum position point are the proposed locations in fundamental wave overvoltage section, are modified, obtain to the proposed locations
To the physical location in fundamental wave overvoltage section.Specifically when actual half-wavelength transmission line of alternation current and preset length are inconsistent
When, then the maximum position point and minimum position point that are obtained according to preset length in above-mentioned specific implementation mode are overvoltage section
Proposed locations, need to be modified it, obtain the physical location in overvoltage section.
Sixth embodiment with reference to first aspect, in the 7th embodiment of first aspect of the embodiment of the present invention, by with
Lower step is modified the proposed locations, obtains the physical location in fundamental wave overvoltage section：Calculate the half-wavelength
First difference of the preset length of transmission line of alternation current and the physical length of the half-wavelength transmission line of alternation current；According to fundamental wave mistake
Minimum position point and first difference of the voltage range away from half-wavelength transmission line of alternation current receiving end, obtain the fundamental wave mistake
The lower limit of voltage range；When fundamental wave overvoltage section, the maximum position point away from half-wavelength transmission line of alternation current receiving end is small
When equal to the preset length of the half-wavelength transmission line of alternation current, the maximum position point is fundamental wave overvoltage section
The upper limit；When the maximum position point be more than the half-wavelength transmission line of alternation current preset length when, the maximum position point with
Second difference of first difference is the upper limit in fundamental wave overvoltage section；According to the upper limit in fundamental wave overvoltage section
The physical location in fundamental wave overvoltage section is determined with the lower limit in fundamental wave overvoltage section.
According to second aspect, an embodiment of the present invention provides a kind of computer equipments, including：At least one processor；With
And the memory being connect at least one processor communication；Wherein, be stored with can be by described at least one for the memory
The computer program that processor executes, the computer program is executed by least one processor, so that described at least one
A processor executes the transmission line of alternation current in any one embodiment of above-mentioned first aspect or first aspect
Overvoltage deciding field method along the line.
According to the third aspect, an embodiment of the present invention provides a kind of computer readable storage mediums, are stored thereon with calculating
Machine program, the computer program are executed by processor described in any one embodiment of first party or first aspect
Transmission line of alternation current along overvoltage deciding field method.
Technical solution of the embodiment of the present invention, has the following advantages that：
An embodiment of the present invention provides overvoltage deciding field method, the AC power lines along a kind of transmission line of alternation current
Curb line overvoltage deciding field method includes：According to the fundamental voltage and electric current, half-wave of half-wavelength transmission line of alternation current sending end
The preset length of long transmission line of alternation current obtains the fundamental voltage carry-over factor along the line of half-wavelength transmission line of alternation current, according to edge
Line fundamental voltage carry-over factor, obtain along fundamental wave overvoltage zone distance half-wavelength transmission line of alternation current receiving end minimum bit
It sets a little with maximum position point, the position in fundamental wave overvoltage section is determined according to minimum position point and maximum position point.By above-mentioned
Step is realized through the fundamental voltage and electric current of half-wavelength transmission line of alternation current sending end and half-wavelength transmission line of alternation current
Preset length establishes the edge for the half-wavelength transmission line of alternation current being made of circuit sending end fundamental voltage and circuit receiving end fundamental voltage
Line fundamental voltage carry-over factor, since the receiving end of the carry-over factor and overvoltage zone distance half-wavelength transmission line of alternation current is maximum
Location point is related to minimum position point, hence, it can be determined that the maximum position point and minimum position point, so that it is determined that fundamental wave is excessively electric
Between pressure area.Overvoltage deciding field method can exchange half-wavelength defeated along transmission line of alternation current provided in an embodiment of the present invention
Overvoltage section is positioned along electric line, and solving in the prior art along the line can not be accurately to half-wavelength transmission line of electricity
The problem of positioning overvoltage section.
Description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to attached drawing, attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 is the flow chart of overvoltage deciding field method along transmission line of alternation current according to the ... of the embodiment of the present invention；
Fig. 2 is fundamental voltage carry-over factor simulation result schematic diagram along transmission line of alternation current according to the ... of the embodiment of the present invention
(1)；
Fig. 3 is fundamental voltage carry-over factor simulation result schematic diagram along transmission line of alternation current according to the ... of the embodiment of the present invention
(2)；
Fig. 4 is fundamental voltage carry-over factor simulation result schematic diagram along transmission line of alternation current according to the ... of the embodiment of the present invention
(3)；
Fig. 5 is the hard of the computer equipment of overvoltage deciding field method along the transmission line of alternation current of the embodiment of the present invention
Part structural schematic diagram.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
There is the every other embodiment obtained under the premise of making creative work, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a kind of overvoltage deciding field methods along transmission line of alternation current, as shown in Figure 1, should
Overvoltage deciding field method includes along transmission line of alternation current：
Step S101：According to the fundamental voltage of half-wavelength transmission line of alternation current sending end and electric current, half-wavelength AC power line
The preset length on road obtains the fundamental voltage carry-over factor along the line of half-wavelength transmission line of alternation current.Specifically, due to defeated in exchange
In electric system, with the variation of operating mode along the line, the fundamental voltage and electric current of circuit sending end would generally be deposited along the line in transmittance process
It is amplified in some sections, it is therefore desirable to obtain the fundamental voltage carry-over factor along the line of half-wavelength transmission line of alternation current.
Step S102：According to fundamental voltage carry-over factor along the line, obtain along fundamental wave overvoltage zone distance half-wavelength hand over
Flow the minimum position point and maximum position point of the receiving end of transmission line of electricity.Since fundamental voltage carry-over factor is and base along the line along this
The minimum position point and the relevant expression formula of maximum position point of wave overvoltage zone distance receiving end, therefore can be according to base along this
Wave voltage carry-over factor obtains the minimum position point and maximum position point of overvoltage zone distance circuit receiving end.
Step S103：The position in fundamental wave overvoltage section is determined according to above-mentioned minimum position point and maximum position point.According to
The minimum position point and maximum position point, according to the length of practical half-wave power transmission circuit, it may be determined that fundamental wave overvoltage section.
Through the above steps, the fundamental voltage and electric current and half-wave by half-wavelength transmission line of alternation current sending end are realized
The preset length of long transmission line of alternation current establishes the half-wavelength being made of circuit sending end fundamental voltage and circuit receiving end fundamental voltage
Fundamental voltage carry-over factor along transmission line of alternation current, due to the carry-over factor exchange with overvoltage zone distance half-wavelength it is defeated
The receiving end maximum position point of electric line is related to minimum position point, hence, it can be determined that the maximum position point and minimum position point,
So that it is determined that fundamental wave overvoltage section.It by the above process, can be to overvoltage section along half-wavelength transmission line of alternation current
It is positioned, is solved the problems, such as in the prior art to overvoltage section can not be accurately located along half-wavelength transmission line of electricity.
Step S101 is related to being exchanged with electric current, half-wavelength according to the fundamental voltage of half-wavelength transmission line of alternation current sending end defeated
The preset length of electric line, obtain half-wavelength transmission line of alternation current along fundamental voltage carry-over factor the step of, at one have
In body embodiment, above-mentioned steps include：It is handed over according to the fundamental voltage of half-wavelength transmission line of alternation current sending end and electric current, half-wavelength
The preset length for flowing transmission line of electricity obtains fundamental voltage and the electric current along the line of half-wavelength transmission line of alternation current, is handed over according to half-wavelength
Fundamental voltage and the electric current along the line for flowing transmission line of electricity obtain the fundamental voltage carry-over factor along the line of half-wavelength transmission line of alternation current.
Specifically, pass through fundamental voltage carry-over factor along the calculating of following formula：
If the voltage and current of half-wave power transmission circuit sending end is：
In formula (1), IphIndicate the real part of the current vector of half-wavelength transmission line of alternation current sending end, IqhIndicate half-wavelength
The imaginary part of the current vector of transmission line of alternation current sending end, UshIndicate the voltage scalar value of half-wavelength transmission line of alternation current sending end.
In half-wavelength transmission line of alternation current during transfer overvoltage, if disregarding the loss of circuit, it is defeated to obtain half-wavelength exchange
Fundamental voltage, electric current along electric line:
In formula (2),The fundamental voltage and electric current of half-wavelength transmission line of alternation current sending end are indicated respectively；Fundamental voltage and the electric current along the line of half-wavelength transmission line of alternation current are indicated respectively；βhIndicate fundamental phase constant, x tables
Show that the distance away from half-wavelength transmission line of alternation current receiving end, l indicate the preset length of the half-wavelength transmission line of alternation current, ZBIt indicates
Lossless wave impedance, h=1.
Simultaneous formula (1) and formula (2), obtain along fundamental voltage carry-over factor：
In formula (3), βhIndicate that fundamental phase constant, x indicate the distance away from half-wavelength transmission line of alternation current receiving end, l tables
Show the preset length of the half-wavelength transmission line of alternation current, ZBIndicate lossless wave impedance, h=1, IphIndicate half-wavelength ac transmission
The real part of the current vector of circuit sending end, IqhIndicate the imaginary part of the current vector of half-wavelength transmission line of alternation current sending end, UshIt indicates
The voltage scalar value of half-wavelength transmission line of alternation current sending end.
It enablesX, Y is respectivelyReal and imaginary parts, that is, have：
X2+Y2=k2 (4)
In formula (4)：
In a specific embodiment, simultaneous formula (4) and formula (5), obtain along fundamental voltage carry-over factor k>1
When fundamental wave overvoltage zone distance half-wavelength transmission line of alternation current receiving end minimum position point and maximum position point：
In formula (6)：
In formula (7),IphIndicate the real part of the current vector of half-wavelength transmission line of alternation current sending end, Iqh
Indicate the imaginary part of the current vector of half-wavelength transmission line of alternation current sending end, IshIndicate the electric current of half-wavelength transmission line of alternation current sending end
Scalar value, ZBIndicate lossless wave impedance, h=1, k indicate along fundamental voltage carry-over factor.
Above-mentioned steps S103 is related to determining the position in fundamental wave overvoltage section according to minimum position point and maximum position point,
In a specific embodiment, above-mentioned steps include：Judge the physical length and preset length of half-wavelength transmission line of alternation current
It is whether consistent, when the physical length of half-wavelength transmission line of alternation current is consistent with preset length, judge maximum position point and minimum
Location point is the position in fundamental wave overvoltage section.When the physical length and half-wavelength AC power line of half-wavelength transmission line of alternation current
When the preset length on road is inconsistent, judge that maximum position point and minimum position point are the proposed locations in fundamental wave overvoltage section, it is right
The proposed locations are modified, and obtain the physical location in fundamental wave overvoltage section.In practical applications, half-wavelength AC power line
The physical length on road may have the phenomenon inconsistent with preset length, the only actual (tube) length in half-wavelength transmission line of alternation current
When degree is consistent with preset length, fundamental wave overvoltage section is exactly the maximum position point and minimum bit that above-mentioned specific implementation mode obtains
Set a section for composition.Specifically when actual half-wavelength transmission line of alternation current and preset length are inconsistent, then above-mentioned specific reality
Apply the maximum position point obtained according to preset length in mode and minimum position point be overvoltage section proposed locations, need
It is modified, the physical location in overvoltage section is obtained.
Specifically, it is that the overvoltage amplification along the line of arbitrary setting is horizontal for fundamental voltage carry-over factor k along the line, due to
Only overvoltage section along analysis, therefore only need to analyzeWhen the case where.It is fundamental wave electricity in sending end voltage
When pressure, section (xmin,xmax) be along fundamental wave overvoltage section, meanwhile, it follows that fundamental voltage carry-over factor pole along the line
The position being worth greatly is：
The embodiment of the present invention gives the specific implementation of overvoltage deciding field method along a transmission line of alternation current
Mode, it is known that the unit length reactance of half-wave power transmission circuit and susceptance are respectively 0.2615 Ω/km and 4.328 × 10-6S/km,
The then a length of 2953km of accurate half-wave, the natural power SIL ≈ 4485MVA of line transmission.Due to half-wave circuit transimission power and
It is that 1.5SIL, power factor θ are respectively that power factor, which can cause overvoltage along the line great influence, consideration line transmission power,
When 1 and ± 0.8, the section of overvoltage along analysis.If overvoltage level is k ＜ 1.4 along the line, the sections k >=1.4 are overvoltage
Section, it is assumed that circuit sending end fundamental voltage US1=10 ° of ∠ pu, then according to formula (6) and formula (8) be calculated along overvoltage
Section (unit：Km position (the unit of carry-over factor maximum) and along the line：Km) it is respectively：
Fundamental voltage carry-over factor simulation result is as shown in Figure 2 along under different capacity factor.
In a specific embodiment, proposed locations are modified by following steps, obtain fundamental wave overvoltage area
Between physical location：The preset length of calculating half-wavelength transmission line of alternation current and the physical length of half-wavelength transmission line of alternation current
First difference, according to minimum position point of the fundamental wave overvoltage section away from half-wavelength transmission line of alternation current receiving end and described first poor
Value, obtains the lower limit in fundamental wave overvoltage section；When dominant bit of the fundamental wave overvoltage section away from half-wavelength transmission line of alternation current receiving end
When setting the preset length for being a little less than or equal to half-wavelength transmission line of alternation current, which is the upper of fundamental wave overvoltage section
Limit；When maximum position point is more than the preset length of half-wavelength transmission line of alternation current, the of the maximum position point and the first difference
Two differences are the upper limit in fundamental wave overvoltage section, and the lower limit according to the upper limit in fundamental wave overvoltage section and fundamental wave overvoltage section is true
Determine the physical location in fundamental wave overvoltage section.
Specifically, in actual design half-wave power transmission circuit, the length of circuit might not install accurate default length
Degree is implemented, when line length is not equal to preset length, since fundamental wave cannot keep integer half-wave character, identical
Under operating mode, the preset length ratio with half-wavelength transmission line of alternation current, along the line overvoltage section will change, need to drafting
Section is modified, and makeover process is as follows：
Δ l=(l-l ') is enabled, then the lower limit in overvoltage section is：
The upper limit in overvoltage sectionFor：
In formula (10), h=1, l indicate the preset length of half-wavelength transmission line of alternation current, by arrangement of conductor, division
The influence of number, Kelvin effect, the factors such as cycle transposition of ground resistivity, circuit；L' indicates half-wavelength transmission line of alternation current
Physical length.
Similarly, the average value of overvoltage section upper and lower limit is taken, the edge under the physical length of half-wavelength transmission line of alternation current can be obtained
The position of the maximum of line fundamental voltage carry-over factor.Still by taking fundamental voltage as an example, system conditions are constant, circuit actual (tube) length
When degree is respectively 2800km and 3200km, if fundamental voltage carry-over factor is 1.4 along the line, fundamental voltage carry-over factor is imitative along the line
True result difference is as shown in Figure 3 and Figure 4, and the overvoltage section being calculated by correction formula (9) and (10) is as shown in table 1,
The position of the maximum of fundamental voltage carry-over factor is as shown in table 2 along corresponding.
Overvoltage section under the physical length of 1 half-wavelength transmission line of alternation current of table
The position of the maximum of fundamental voltage carry-over factor along table 2
Overvoltage deciding field method along transmission line of alternation current through the embodiment of the present invention, is put with the overvoltage of setting
Based on big level, under different operating modes, using the overvoltage section formula and its correction formula of derivation, calculate corresponding
Overvoltage section, so be calculated overvoltage maximum point along line position.This method principle is simple, it is only necessary to electricity be arranged
Overvoltage section along half-wave power transmission circuit can be oriented by pressing the gentle system operational parameters of flood, have higher answer
With value.
The embodiment of the present invention additionally provides a kind of computer equipment, and Fig. 5 is the AC power line curb of the embodiment of the present invention
The hardware architecture diagram of the computer equipment of line overvoltage deciding field method, as shown in figure 5, the computer equipment includes one
A or multiple processors 51 and memory 52, in Fig. 5 by taking a processor 51 as an example.
The computer equipment can also include：Input unit 53 and output device 54.
Processor 51, memory 52, input unit 53 and output device 54 can be connected by bus or other modes,
In Fig. 5 for being connected by bus.
Processor 51 can be central processing unit (Central Processing Unit, CPU).Processor 51 can be with
For other general processors, digital signal processor (Digital Signal Processor, DSP), application-specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
The combination of the chips such as discrete hardware components or above-mentioned all kinds of chips.General processor can be microprocessor or the processing
Device can also be any conventional processor etc..
Memory 52 is used as a kind of non-transient computer readable storage medium, can be used for storing non-transient software program, non-
Transient computer executable program and module, such as overvoltage deciding field along the transmission line of alternation current in the embodiment of the present invention
Corresponding program instruction/the module of method.Processor 51 is by running the non-transient software program being stored in memory 52, instruction
And module, the various function application to execute server and data processing, that is, it realizes described in above method embodiment
Overvoltage deciding field method along transmission line of alternation current.
Memory 52 may include storing program area and storage data field, wherein storing program area can storage program area,
At least one required application program of function；Storage data field can store fixed according to overvoltage section along transmission line of alternation current
The device of position uses created data etc..In addition, memory 52 may include high-speed random access memory, can also wrap
Include non-transient memory, a for example, at least disk memory, flush memory device or other non-transient solid-state memories.
In some embodiments, it includes the memory remotely located relative to processor 51 that memory 52 is optional, these remote memories can
To pass through overvoltage deciding field device along network connection to transmission line of alternation current.The example of above-mentioned network includes but not limited to
Internet, intranet, LAN, mobile radio communication and combinations thereof.
Input unit 53 can receive inquiry request input by user (or other numbers or character information), and generates and hand over
Flow the related key signals input of user setting and function control of overvoltage deciding field device along transmission line of electricity.Output dress
It sets 54 and may include that display screen etc. shows equipment, to export result of calculation.
One or more of modules are stored in the memory 52, when by one or more of processors 51
When execution, method as shown in Figure 1 is executed.
The said goods can perform the method that the embodiment of the present invention is provided, and has the corresponding function module of execution method and has
Beneficial effect.The not technical detail of detailed description in embodiments of the present invention, for details, reference can be made to embodiments as shown in Figures 1 to 4
In associated description.
The embodiment of the present invention also provides a kind of non-transient computer storage medium, and the computer storage media is stored with meter
Calculation machine executable instruction, the computer executable instructions can perform along the transmission line of alternation current in above-mentioned any means embodiment
Overvoltage deciding field method.Wherein, the storage medium can be magnetic disc, CD, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), flash memory (Flash
Memory), hard disk (Hard Disk Drive, abbreviation：) or solid state disk (Solid-State Drive, SSD) etc. HDD；Institute
State the combination that storage medium can also include the memory of mentioned kind.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of overvoltage deciding field method along transmission line of alternation current, which is characterized in that including：
According to the default length of the fundamental voltage of half-wavelength transmission line of alternation current sending end and electric current, the half-wavelength transmission line of alternation current
Degree obtains the fundamental voltage carry-over factor along the line of half-wavelength transmission line of alternation current；
According to fundamental voltage carry-over factor along described, obtain along half-wavelength ac transmission described in fundamental wave overvoltage zone distance
The minimum position point and maximum position point of the receiving end of circuit；
The position in fundamental wave overvoltage section is determined according to the minimum position point and maximum position point.
2. overvoltage deciding field method along transmission line of alternation current according to claim 1, which is characterized in that described
According to the fundamental voltage and electric current of half-wavelength transmission line of alternation current sending end, the preset length of the half-wavelength transmission line of alternation current, obtain
Along to half-wavelength transmission line of alternation current the step of fundamental voltage carry-over factor, including：
According to the default length of the fundamental voltage of half-wavelength transmission line of alternation current sending end and electric current, the half-wavelength transmission line of alternation current
Degree obtains fundamental voltage and the electric current along the line of half-wavelength transmission line of alternation current；
According to fundamental voltage and electric current along the half-wavelength transmission line of alternation current, the half-wavelength transmission line of alternation current is obtained
Along fundamental voltage carry-over factor.
3. overvoltage deciding field method along transmission line of alternation current according to claim 2, which is characterized in that by with
Lower formula calculates fundamental voltage and the electric current along the line of the half-wavelength transmission line of alternation current：
Wherein,The fundamental voltage and electric current of half-wavelength transmission line of alternation current sending end are indicated respectively；Table respectively
Show fundamental voltage and the electric current along the line of half-wavelength transmission line of alternation current；βhIndicate that fundamental phase constant, x indicate to exchange away from half-wavelength
The distance of transmission line of electricity receiving end, l indicate the preset length of the half-wavelength transmission line of alternation current, ZBIndicate lossless wave impedance, h=
1。
4. overvoltage deciding field method along transmission line of alternation current according to claim 3, which is characterized in that by with
Lower formula calculates the fundamental voltage carry-over factor along the line of the half-wavelength transmission line of alternation current：
Wherein, IphIndicate the real part of the current vector of half-wavelength transmission line of alternation current sending end, IqhIndicate half-wavelength AC power line
The imaginary part of the current vector of road sending end, UshIndicate the voltage scalar value of half-wavelength transmission line of alternation current sending end.
5. overvoltage deciding field method along transmission line of alternation current according to claim 4, which is characterized in that according to
Lower formula calculates the minimum position point of the receiving end of half-wavelength transmission line of alternation current described in fundamental wave overvoltage zone distance along described
With maximum position point：
Wherein：
Wherein,IphIndicate the real part of the current vector of half-wavelength transmission line of alternation current sending end, IqhIndicate half-wavelength
The imaginary part of the current vector of transmission line of alternation current sending end, IshIndicate the scalar value of the electric current of half-wavelength transmission line of alternation current sending end,
ZBIndicate lossless wave impedance, h=1, k indicate along fundamental voltage carry-over factor.
6. overvoltage deciding field method along transmission line of alternation current according to claim 1, which is characterized in that described
Determine that the position in fundamental wave overvoltage section includes according to the minimum position point and maximum position point：
Judge whether physical length and the preset length of the half-wavelength transmission line of alternation current are consistent；
When the physical length of half-wavelength transmission line of alternation current is consistent with the preset length, the maximum position point and institute are judged
State the position that minimum position point is fundamental wave overvoltage section.
7. overvoltage deciding field method along transmission line of alternation current according to claim 6, which is characterized in that work as half-wave
When the physical length of long transmission line of alternation current and the inconsistent preset length of the half-wavelength transmission line of alternation current, described in judgement most
Big location point and minimum position point are the proposed locations in fundamental wave overvoltage section, are modified, obtain to the proposed locations
To the physical location in fundamental wave overvoltage section.
8. overvoltage deciding field method along transmission line of alternation current according to claim 7, which is characterized in that by with
Lower step is modified the proposed locations, obtains the physical location in fundamental wave overvoltage section：
Calculate the preset length of the half-wavelength transmission line of alternation current and the physical length of the half-wavelength transmission line of alternation current
First difference；
According to minimum position point of the fundamental wave overvoltage section away from half-wavelength transmission line of alternation current receiving end and first difference,
Obtain the lower limit in fundamental wave overvoltage section；
Described in being less than or equal to when maximum position point of the fundamental wave overvoltage section away from half-wavelength transmission line of alternation current receiving end
When the preset length of half-wavelength transmission line of alternation current, the maximum position point is the upper limit in fundamental wave overvoltage section；
When the maximum position point is more than the preset length of the half-wavelength transmission line of alternation current, the maximum position point and institute
The second difference for stating the first difference is the upper limit in fundamental wave overvoltage section；
The fundamental wave overvoltage is determined according to the lower limit of the upper limit in fundamental wave overvoltage section and fundamental wave overvoltage section
The physical location in section.
9. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt
It is realized when processor executes as along transmission line of alternation current described in any item of the claim 1 to 8 overvoltage deciding field side
Method.
10. a kind of computer equipment, which is characterized in that including：
At least one processor；And
The memory being connect at least one processor communication；Wherein, be stored with can be by described at least one for the memory
The computer program that a processor executes, the computer program are executed by least one processor so that it is described at least
One processor perform claim requires overvoltage deciding field method along the transmission line of alternation current described in any one of 1 to 8.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2086990C1 (en) * | 1994-08-09 | 1997-08-10 | Акционерное общество открытого типа "Краснодарский ЗИП" | Electric meter with three position control |
| CN101719695A (en) * | 2009-12-24 | 2010-06-02 | 中国电力科学研究院 | Method for discriminating requirements of ultra-high voltage (UHV) line steady-state overvoltage device |
| CN103474998A (en) * | 2013-08-23 | 2013-12-25 | 江苏省电力设计院 | 500kV cable and overhead joint line overvoltage optimization control method |
| CN106159957A (en) * | 2015-04-09 | 2016-11-23 | 中国电力科学研究院 | A kind of optimization method exchanging weak section steady-state overvoltage Pre-control measures |
| CN106208018A (en) * | 2016-07-22 | 2016-12-07 | 中国电力科学研究院 | The suppressing method of a kind of no-load transformer resonance overvoltage and device |
| CN106683855A (en) * | 2017-03-06 | 2017-05-17 | 山东输变电设备有限公司 | High-voltage line outlet structure of electric reactor at voltage of less than or equal to 500kV |
| CN106771521A (en) * | 2016-12-15 | 2017-05-31 | 重庆大学 | A kind of substation equipment overvoltage aggregation of data acquisition system and method |
| CN106849118A (en) * | 2017-01-16 | 2017-06-13 | 许继集团有限公司 | A kind of half-wave power transmission mixing tuning system based on power electronics commutation technique |
| CN106998063A (en) * | 2017-03-24 | 2017-08-01 | 全球能源互联网研究院 | A kind of secondary arc current active inhibiting system of half-wavelength transmission line of alternation current |
| CN107132409A (en) * | 2017-02-23 | 2017-09-05 | 中国电力科学研究院 | A kind of determination method and apparatus of half-wave power transmission line steady-state voltage limits |
| CN107147125A (en) * | 2017-05-25 | 2017-09-08 | 中国电力科学研究院 | A kind of determination method and apparatus of half-wave power transmission line steady-state voltage sensibility |
| CN107370134A (en) * | 2017-05-03 | 2017-11-21 | 昆明理工大学 | A kind of method for reducing extra high voltage direct current transmission line DC filter overvoltage |
| CN107394766A (en) * | 2017-07-31 | 2017-11-24 | 天津大学 | A kind of overvoltage method for limiting suitable for half-wave power transmission circuit |
-
2018
- 2018-01-26 CN CN201810078973.5A patent/CN108387819B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2086990C1 (en) * | 1994-08-09 | 1997-08-10 | Акционерное общество открытого типа "Краснодарский ЗИП" | Electric meter with three position control |
| CN101719695A (en) * | 2009-12-24 | 2010-06-02 | 中国电力科学研究院 | Method for discriminating requirements of ultra-high voltage (UHV) line steady-state overvoltage device |
| CN103474998A (en) * | 2013-08-23 | 2013-12-25 | 江苏省电力设计院 | 500kV cable and overhead joint line overvoltage optimization control method |
| CN106159957A (en) * | 2015-04-09 | 2016-11-23 | 中国电力科学研究院 | A kind of optimization method exchanging weak section steady-state overvoltage Pre-control measures |
| CN106208018A (en) * | 2016-07-22 | 2016-12-07 | 中国电力科学研究院 | The suppressing method of a kind of no-load transformer resonance overvoltage and device |
| CN106771521A (en) * | 2016-12-15 | 2017-05-31 | 重庆大学 | A kind of substation equipment overvoltage aggregation of data acquisition system and method |
| CN106849118A (en) * | 2017-01-16 | 2017-06-13 | 许继集团有限公司 | A kind of half-wave power transmission mixing tuning system based on power electronics commutation technique |
| CN107132409A (en) * | 2017-02-23 | 2017-09-05 | 中国电力科学研究院 | A kind of determination method and apparatus of half-wave power transmission line steady-state voltage limits |
| CN106683855A (en) * | 2017-03-06 | 2017-05-17 | 山东输变电设备有限公司 | High-voltage line outlet structure of electric reactor at voltage of less than or equal to 500kV |
| CN106998063A (en) * | 2017-03-24 | 2017-08-01 | 全球能源互联网研究院 | A kind of secondary arc current active inhibiting system of half-wavelength transmission line of alternation current |
| CN107370134A (en) * | 2017-05-03 | 2017-11-21 | 昆明理工大学 | A kind of method for reducing extra high voltage direct current transmission line DC filter overvoltage |
| CN107147125A (en) * | 2017-05-25 | 2017-09-08 | 中国电力科学研究院 | A kind of determination method and apparatus of half-wave power transmission line steady-state voltage sensibility |
| CN107394766A (en) * | 2017-07-31 | 2017-11-24 | 天津大学 | A kind of overvoltage method for limiting suitable for half-wave power transmission circuit |
Non-Patent Citations (1)
| Title |
|---|
| 阎玉丽: "特高压半波长交流输电***操作过电压问题的研究", 《中国优秀硕士学位论文全文数据库(电子期刊网)》 * |
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