CN104950221B - Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic - Google Patents
Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic Download PDFInfo
- Publication number
- CN104950221B CN104950221B CN201510336627.9A CN201510336627A CN104950221B CN 104950221 B CN104950221 B CN 104950221B CN 201510336627 A CN201510336627 A CN 201510336627A CN 104950221 B CN104950221 B CN 104950221B
- Authority
- CN
- China
- Prior art keywords
- transmission line
- tangent function
- hyperbolic tangent
- fault
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000016507 interphase Effects 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 230000005611 electricity Effects 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 15
- 230000001012 protector Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 36
- 238000005259 measurement Methods 0.000 abstract description 15
- 230000007704 transition Effects 0.000 abstract description 5
- 230000004807 localization Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Locating Faults (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic.The method of the present invention is modeled using distributed constant, the hyperbolic tangent function amplitude at computing electric power line phase fault point | th (γ1lf) |, selection fault distance initial value is lx, every bit on computing electric power line successively is incremented by with fixed step size Δ l | | th (γ1lf)|‑|th(γ1lx) | | value, until transmission line of electricity overall length, chooses on transmission line of electricity | | th (γ1lf)|‑|th(γ1lx) | | it is fault distance that value, which reaches minimum distance of the point away from line protection installation place,.The method of the present invention describes transmission line of electricity voltage using distributed constant, the physical characteristic of electric current transmission is suitable for high pressure/super-high-voltage/ultra-high-voltage phase fault single end distance measurement with the ability that natural anti-capacitance current influences.The method of the present invention realizes the single end distance measurement of line inter-phase fault using hyperbolic tangent function amplitude characteristic, and influence of the transition resistance to single end distance measurement precision is overcome in principle, has very high range accuracy.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, concretely relate to a kind of utilizing hyperbolic tangent function
Amplitude characteristic realizes circuit inter-phase fault single-end ranging.
Background technology
Used in ranging electrical quantity divides, and the method for fault localization can be divided into two major classes：Both-end distance measuring and single end distance measurement.
Two-terminal Fault Location method is the method for determining transmission line malfunction position using transmission line of electricity both ends electrical quantity, it is needed by logical
Road obtains opposite end electrical quantity, therefore strong to the dependence in channel, is also easily influenced by both-end sampling value synchronization in actual use.
Single end distance measurement method is that a kind of method of transmission line malfunction position is determined merely with the voltage and current data of transmission line of electricity one end, by
An end data is only needed in it, without communication and data synchronizer, operating cost is low and algorithmic stability, therefore in mesolow line
It is widely applied in road.Currently, method of single end distance measurement is broadly divided into two classes, one kind is traveling wave method, and another kind of is impedance
Method.Traveling wave method carries out ranging using the transmission property of fault transient travelling wave, and precision is high, not by shadows such as the method for operation, excessive resistances
It rings, but very high to sample rate requirement, needs special wave recording device, do not obtain substantive application at present.Impedance method utilizes event
Voltage, the magnitude of current after barrier calculate the impedance of fault loop, and failure survey is carried out according to the line length characteristic directly proportional to impedance
Away from, it is simple and reliable, but influenced by factors such as the transition resistance of failure, circuit non complete symmetries.Due to ultra-high-tension power transmission line
There is larger capacitance current along the line, when high resistant short trouble in ultra-high-tension power transmission line generation, single-ended impedance method ranging
As a result can substantial deviation true fault distance, cannot meet scene application requirement.Therefore, using the single-ended of lumped parameter modeling
Impedance method is not directly applicable the fault localization of ultra-high-tension power transmission line.
The concern of numerous scholars is gradually caused using distributed parameter model research ultra-high-tension power transmission line one-end fault ranging.
Breathe out what the permanent rising sun, Zhang Baohui, Lv Zhi et al. were delivered《Ultra-high-tension power transmission line single end distance measurement new principle is inquired into》It is built using distributed constant
Mould carries out fault point and determines using single ended voltage Current calculation along the adjust the distance norm distribution on the line of derivative of line voltage
Position.This method relates to a large amount of derivative operation and integral operation, and required operand is big, and algorithm complexity is not easy to realize.Lin Xiangning,
What yellow small echo et al. was delivered《Ratio phase formula single-phase fault single end distance measurement algorithm based on distributed parameter model》It is built using distributed constant
Mould carries out fault location according to the residual voltage of fault point and fault current same-phase feature.The method improve distribution capacity pair
The influence of single-ended impedance method fault localization, but in high resistance earthing fault, range error reaches -2.38%, and Error Absolute Value is more than
1.5%, the application requirement at scene cannot be met.What Wang Bin, Dong Xinzhou et al. were delivered《UHV Long Transmission Line single-ended impedance method is single-phase
Earth fault distance measurement》It is modeled using distributed constant, the phase angle of fault point voltage is estimated using the phase angle of negative-sequence current at observation point,
Then it is calculated in fault point voltage instantaneous value zero passage point moment and measures impedance.This method is in medium or low resistance short trouble, due to edge
Line voltage declines obviously, using error existing for negative-sequence current phase angle estimation fault point voltage phase angle at observation point to distance measurement result
It influences little；But in high resistant short trouble, due to each point voltage phase difference very little along circuit, negative-sequence current at observation point is utilized
Phase angle estimates that error existing for fault point voltage phase angle adds the influence of transient process, and this method range error is larger.
Invention content
It is an object of the present invention to overcome the deficiencies of the prior art, and to provide a kind of range accuracy not by transition resistance,
Capacitance current and load current influence, and line is realized using hyperbolic tangent function amplitude characteristic with very high range accuracy
Road inter-phase fault single-end ranging.
To complete above-mentioned purpose, the present invention adopts the following technical scheme that：
Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic, which is characterized in that including
Following sequential steps：
(1) the failure voltage between phases of protector measuring line protection installation placeFailure three-phase currentWith
The alternate negative-sequence current of failureWherein, φ φ are that failure is separate, φ φ=AB, BC, CA phase；
(2) the hyperbolic tangent function amplitude at protective device computing electric power line phase fault point | th (γ1lf)|：
Wherein, φ φ=AB, BC, CA phase；lsetFor line protection setting range, 0.85 times of transmission line length is taken；
γ1For electric transmission line positive sequence propagation coefficient；Zc1For electric transmission line positive sequence wave impedance；For's
Imaginary part；ForImaginary part；ForImaginary part；α=Arg
(th(γ1lset))；th(γ1lset) it is γ1lsetHyperbolic tangent function；J is complex operator；lfFor phase fault point away from
The fault distance of line protection installation place；ch(γ1lset) it is γ1lsetHyperbolic cosine function；th(γ1lf) it is γ1lf
Hyperbolic tangent function；
(3) it is l that protective device, which chooses fault distance initial value,x, it is incremented by with fixed step size Δ l, successively computing electric power line
Upper every bit | | th (γ1lf)|-|th(γ1lx) | | value, until transmission line of electricity overall length；Wherein, it is transmission of electricity that Δ l, which takes 0.001l, l,
Line length；th(γ1lx) it is γ1lxHyperbolic tangent function；th(γ1lf) it is γ1lfHyperbolic tangent function.
(4) protective device is chosen on transmission line of electricity | | th (γ1lf)|-|th(γ1lx) | | value reaches the point of minimum away from transmission of electricity
The distance of route protection installation place is fault distance.
The present invention compared with prior art, has following positive achievement：
The physical characteristic that the method for the present invention describes transmission line of electricity voltage using distributed constant, electric current transmits, has naturally
The ability that anti-capacitance current influences is suitable for high pressure/single-ended survey of super-high-voltage/ultra-high-voltage phase fault
Away from.The method of the present invention realizes the single end distance measurement of line inter-phase fault using hyperbolic tangent function amplitude characteristic, is overcome in principle
Influence of the transition resistance to single end distance measurement precision has very high range accuracy.The method of the present invention considers in algorithm design
The influence of phase fault point voltage, overcomes influence of the load current to single end distance measurement precision；The method of the present invention is a kind of
The method of search type, there is no the not convergence problems of the pseudo- root problem and iterative method of the method for solving equation, have very strong practicability.
Description of the drawings
Fig. 1 is the multi-line power transmission system schematic using the present invention.
Specific implementation mode
Technical scheme of the present invention is expressed in further detail below according to Figure of description.
Fig. 1 is the multi-line power transmission system schematic using the present invention.CVT is voltage transformer in Fig. 1, CT is Current Mutual Inductance
Device.Current waveform of the protective device to the potential and current transformers CT of the voltage transformer CVT of line protection installation place
It is sampled to obtain voltage, current instantaneous value.
Protective device is to sampling obtained voltage, current instantaneous value utilizes the protection installation of Fourier algorithm computing electric power line
The failure voltage between phases at placeFailure three-phase currentNegative-sequence current alternate with failureWherein, φ φ are failure phase
Not, φ φ=AB, BC, CA phase.
Protective device calculatesImaginary part
Protective device calculatesImaginary part
Protective device calculatesImaginary part
Hyperbolic tangent function th (γ at protective device computing electric power line protection seting range1lset) phase angle α=
Arg(th(γ1lset))；Wherein, th (γ1lset) it is γ1lsetHyperbolic tangent function.
Hyperbolic tangent function amplitude at protective device computing electric power line phase fault point | th (γ1lf)|：
Wherein, φ φ=AB, BC, CA phase；lsetFor line protection setting range, 0.85 times of transmission line length is taken；
γ1For electric transmission line positive sequence propagation coefficient；Zc1For electric transmission line positive sequence wave impedance；J is complex operator；lfFor phase fault
Fault distance of the point away from line protection installation place；ch(γ1lset) it is γ1lsetHyperbolic cosine function；th(γ1lf) be
γ1lfHyperbolic tangent function.
It is l that protective device, which chooses fault distance initial value,x, it is incremented by with fixed step size Δ l, it is every on computing electric power line successively
At a bit | | th (γ1lf)|-|th(γ1lx) | | value, until transmission line of electricity overall length；Wherein, it is power transmission line that Δ l, which takes 0.001l, l,
Road length；th(γ1lx) it is γ1lxHyperbolic tangent function；th(γ1lf) it is γ1lfHyperbolic tangent function.During being somebody's turn to do, lx
It is incremented by since 0, and with fixed step size Δ l, until transmission line of electricity overall length terminates to complete every bit on transmission line of electricity | | th (γ1lf)|-|th(γ1lx) | | the calculating of value.
Protective device is chosen on transmission line of electricity | | th (γ1lf)|-|th(γ1lx) | | value reaches the point of minimum away from power transmission line
It is fault distance that the distance of installation place is protected on road.
The physical characteristic that the method for the present invention describes transmission line of electricity voltage using distributed constant, electric current transmits, has naturally
The ability that anti-capacitance current influences is suitable for high pressure/single-ended survey of super-high-voltage/ultra-high-voltage phase fault
Away from.The method of the present invention realizes the single end distance measurement of line inter-phase fault using hyperbolic tangent function amplitude characteristic, is overcome in principle
Influence of the transition resistance to single end distance measurement precision has very high range accuracy.The method of the present invention considers in algorithm design
The influence of phase fault point voltage, overcomes influence of the load current to single end distance measurement precision；The method of the present invention is a kind of
The method of search type, there is no the not convergence problems of the pseudo- root problem and iterative method of the method for solving equation, have very strong practicability.
The foregoing is merely the preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, appoint
What those familiar with the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in, all
It is covered by the protection scope of the present invention.
Claims (1)
1. realizing circuit inter-phase fault single-end ranging using hyperbolic tangent function amplitude characteristic, which is characterized in that including such as
Lower sequential steps：
(1) the failure voltage between phases of protector measuring line protection installation placeFailure three-phase currentAnd therefore
Hinder alternate negative-sequence currentWherein, φ φ are that failure is separate, φ φ=AB, BC, CA phase；
(2) the hyperbolic tangent function amplitude at protective device computing electric power line phase fault point | th (γ1lf)|：
Wherein, φ φ=AB, BC, CA phase；lsetFor line protection setting range, 0.85 times of transmission line length is taken；γ1For
Electric transmission line positive sequence propagation coefficient；Zc1For electric transmission line positive sequence wave impedance；ForImaginary part；ForImaginary part；ForImaginary part；α=Arg (th (γ1lset))；th(γ1lset) it is γ1lsetHyperbolic tangent function；J is complex operator；lfIt is phase fault point away from power transmission line
Protect the fault distance of installation place in road；ch(γ1lset) it is γ1lsetHyperbolic cosine function；th(γ1lf) it is γ1lfHyperbolic
Tangent function；
(3) it is l that protective device, which chooses fault distance initial value,x, it is incremented by with fixed step size Δ l, it is each on computing electric power line successively
Point | | th (γ1lf)|-|th(γ1lx) | | value, until transmission line of electricity overall length；Wherein, it is transmission line of electricity that Δ l, which takes 0.001l, l,
Length；th(γ1lx) it is γ1lxHyperbolic tangent function；th(γ1lf) it is γ1lfHyperbolic tangent function,
(4) protective device is chosen on transmission line of electricity | | th (γ1lf)|-|th(γ1lx) | | value reaches the point of minimum away from transmission line of electricity
It is fault distance to protect the distance of installation place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510336627.9A CN104950221B (en) | 2015-06-17 | 2015-06-17 | Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510336627.9A CN104950221B (en) | 2015-06-17 | 2015-06-17 | Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104950221A CN104950221A (en) | 2015-09-30 |
| CN104950221B true CN104950221B (en) | 2018-07-24 |
Family
ID=54165022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510336627.9A Active CN104950221B (en) | 2015-06-17 | 2015-06-17 | Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104950221B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200563A (en) * | 2011-01-20 | 2011-09-28 | 福建省电力有限公司福州超高压输变电局 | Line single-phase earth fault single-terminal location method based on positioning function amplitude characteristics |
| CN103219713A (en) * | 2013-04-15 | 2013-07-24 | 国家电网公司 | Electric transmission line phase fault distance protecting method |
| CN103245878A (en) * | 2013-04-15 | 2013-08-14 | 国家电网公司 | Single-end distance measurement method for electric transmission line single-phase earth fault |
| CN103293445A (en) * | 2013-05-19 | 2013-09-11 | 国家电网公司 | Line inter-phase fault single-terminal location method implemented by aid of measured impedance amplitude characteristics of distributed parameters |
| CN103293439A (en) * | 2013-05-19 | 2013-09-11 | 国家电网公司 | Single-terminal distance measurement method for line single-phase earth faults based on distributed parameter measurement impedance amplitude characteristics |
| CN103323739A (en) * | 2013-05-19 | 2013-09-25 | 国家电网公司 | Line phase-to-phase fault single-end distance measuring method based on distributed parameter measurement impedance amplitude value characteristics |
| CN104078955A (en) * | 2014-07-25 | 2014-10-01 | 国家电网公司 | Action boundary based relay protection method for interphase faults of self-adapting adjusting electric transmission line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE519943C2 (en) * | 2000-12-14 | 2003-04-29 | Abb Ab | Method for fault location in a transmission line |
-
2015
- 2015-06-17 CN CN201510336627.9A patent/CN104950221B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200563A (en) * | 2011-01-20 | 2011-09-28 | 福建省电力有限公司福州超高压输变电局 | Line single-phase earth fault single-terminal location method based on positioning function amplitude characteristics |
| CN103219713A (en) * | 2013-04-15 | 2013-07-24 | 国家电网公司 | Electric transmission line phase fault distance protecting method |
| CN103245878A (en) * | 2013-04-15 | 2013-08-14 | 国家电网公司 | Single-end distance measurement method for electric transmission line single-phase earth fault |
| CN103293445A (en) * | 2013-05-19 | 2013-09-11 | 国家电网公司 | Line inter-phase fault single-terminal location method implemented by aid of measured impedance amplitude characteristics of distributed parameters |
| CN103293439A (en) * | 2013-05-19 | 2013-09-11 | 国家电网公司 | Single-terminal distance measurement method for line single-phase earth faults based on distributed parameter measurement impedance amplitude characteristics |
| CN103323739A (en) * | 2013-05-19 | 2013-09-25 | 国家电网公司 | Line phase-to-phase fault single-end distance measuring method based on distributed parameter measurement impedance amplitude value characteristics |
| CN104078955A (en) * | 2014-07-25 | 2014-10-01 | 国家电网公司 | Action boundary based relay protection method for interphase faults of self-adapting adjusting electric transmission line |
Non-Patent Citations (1)
| Title |
|---|
| 基于分布参数模型的高压输电线路单相接地故障单端测距方法;林富洪 等;《电网技术》;20110430;第35卷(第4期);第201-205页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104950221A (en) | 2015-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105891669B (en) | Line single phase grounding failure distance measuring method based on transition resistance actual measurement | |
| CN103293439B (en) | Based on distribution parameter measurement impedance magnitude characteristic line single-phase earth fault single-terminal location method | |
| CN103293442B (en) | Residual voltage distribution character is utilized to realize line single-phase earth fault single-terminal location method | |
| CN102200563B (en) | Line single-phase earth fault single-terminal ranging method based on positioning function amplitude characteristics | |
| CN102175954B (en) | Circuit inter-phase fault single-end ranging method | |
| CN105652156B (en) | Ultrahigh voltage alternating current transmission lines single-phase earthing voltage-phase is mutated distance measuring method | |
| CN102129014B (en) | Method for realizing line phase-to-phase fault single-end distance measurement by utilizing distribution parameter model | |
| CN103176102B (en) | A kind of range finding yardstick minimum principle that utilizes realizes line single-phase earth fault single-terminal location method | |
| CN103293445B (en) | Distribution parameter measurement impedance magnitude characteristic is utilized to realize circuit inter-phase fault single-end ranging | |
| CN103869221A (en) | SV network sampling-based double-circuit line single-phase earth fault distance measurement method | |
| CN103293441B (en) | Distribution parameter is utilized to realize line single-phase earth fault single-terminal location method | |
| CN104730416B (en) | A kind of transmission line of electricity method of single end distance measurement using jump-value of current as amount of polarization | |
| CN103323739B (en) | Based on distribution parameter measurement impedance magnitude characteristic circuit inter-phase fault single-end ranging | |
| CN104198889B (en) | Successive action based single-terminal location method for instant ground fault of high-voltage line | |
| CN103245877B (en) | Method for ranging single-phase earth fault of line by using single-end electric quantity | |
| CN103293444B (en) | The line single-phase earth fault single-terminal location method of anti-transition resistance and load current impact | |
| CN104330705B (en) | Circuit inter-phase fault single-end ranging based on phase-to phase fault location factor | |
| CN104950221B (en) | Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function amplitude characteristic | |
| CN105242174B (en) | Based on impedance mapping function amplitude characteristic line single phase grounding failure distance measuring method | |
| CN104950222B (en) | Circuit inter-phase fault single-end ranging is realized using hyperbolic tangent function phase characteristic | |
| CN104764977A (en) | Phase characteristic line phase-to-phase fault single-ended positioning method based on impedance positioning functions | |
| CN104730415B (en) | Circuit inter-phase fault single-end ranging based on impedance mapping function amplitude characteristic | |
| CN104316842B (en) | Line phase fault single-ended distance measurement method by means of phase fault position factor phase characteristic | |
| CN105891670B (en) | Line inter-phase fault single end positioning method is realized using voltage imaginary part directional characteristic | |
| CN104950220B (en) | Double-circuit lines on the same pole road singlephase earth fault method of single end distance measurement is realized using single back line single-end electrical quantity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |