CN103543358B - A kind of extra high voltage direct current transmission line and the border confining method to high frequency content attenuation size - Google Patents
A kind of extra high voltage direct current transmission line and the border confining method to high frequency content attenuation size Download PDFInfo
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- CN103543358B CN103543358B CN201310506651.3A CN201310506651A CN103543358B CN 103543358 B CN103543358 B CN 103543358B CN 201310506651 A CN201310506651 A CN 201310506651A CN 103543358 B CN103543358 B CN 103543358B
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Abstract
The present invention relates to a kind of extra high voltage direct current transmission line and the border confining method to high frequency content attenuation size, belong to technical field of ultrahigh voltage direct current.The present invention arrive protection device according to the high frequency transient signal of trouble point on DC line by the extra high voltage direct current transmission line of a length of x after high frequency transient signal and the delivery that is divided by of the high frequency transient signal of trouble point on DC line obtain extra high voltage direct current transmission line high frequency content decayed to | e‑γx|；The high frequency transient signal of the high frequency transient signal after utilizing the high frequency transient signal of DC bus fault point to arrive protection device by extra high voltage direct current transmission line border and the DC bus fault point delivery that is divided by obtains extra-high voltage direct-current transmission border high frequency content decays to | G (j ω) |；Finally define | e‑γx| and the magnitude relationship between | G (j ω) |.The present invention can define extra-high DC power transmission line and the border size to high frequency content attenuation effectively.
Description
Technical field
The present invention relates to a kind of extra high voltage direct current transmission line and the border confining method to high frequency content attenuation size,
Belong to technical field of ultrahigh voltage direct current.
Background technology
At present, known extra high voltage direct current transmission line and the border attenuation characteristic to fault transient signals high fdrequency component
For: extra high voltage direct current transmission line has attenuation to high frequency content, and circuit is the longest, and attenuation is the strongest；By smoothing reactor,
There is the strongest attenuation on the extra high voltage direct current transmission line border that DC filter and PLC wave filter are constituted to high frequency content.Right
Same high frequency transient signal, is circuit or the attenuation on border is big？Not yet provide clear and definite confining method at present.Having must
Extra high voltage direct current transmission line to be studied and the border confining method to high frequency content attenuation size.
Summary of the invention
The invention provides a kind of extra high voltage direct current transmission line with border to the high frequency content attenuation size side of defining
Method, for solving the problem that high frequency content attenuation size is defined by extra high voltage direct current transmission line with border.
The technical scheme is that a kind of extra high voltage direct current transmission line and border are to high frequency content attenuation size
Confining method, first according to the high frequency transient signal of trouble point on DC lineExtra-high voltage direct-current by a length of x
Transmission line of electricity arrives the high frequency transient signal after protection deviceWith the high frequency transient signal of trouble point on DC lineThe delivery that is divided by obtains extra high voltage direct current transmission line and decays to high frequency content；Then dc bus event is utilized
The high frequency transient signal of barrier pointArrive the high frequency transient after protection device by extra high voltage direct current transmission line border to believe
NumberHigh frequency transient signal with DC bus fault pointThe delivery that is divided by obtains extra-high voltage direct-current transmission border pair
Decaying to of high frequency content；Finally according toWithBetween magnitude relationship realize extra-high voltage direct-current transmission
High frequency content attenuation size is defined by circuit with border.
Described basisWithBetween magnitude relationship realize extra high voltage direct current transmission line and border to height
The confining method of frequency amount attenuation size is as follows:
WhenTime, then it represents that the decay of circuit is less than the decay on border；
WhenTime, then it represents that the decay of circuit is equal to the decay on border；
WhenTime, then it represents that the decay of circuit is more than the decay on border；
In formula: x is extra high voltage direct current transmission line length,For extra high voltage direct current transmission line propagation coefficientReality
Portion,Amplitude for the transmission function on extra high voltage direct current transmission line border.
The operation principle of the present invention is:
The wire physical dimension of known extra high voltage direct current transmission line, distribution and position, tower structure etc., can calculate
The phase mould frequency variable element of circuit, and then obtain the line propagation coefficient of this circuit；Utilize smoothing reactor, DC filter,
The parameter of PLC wave filter, can obtain by smoothing reactor, DC filter, the constituted extra-high voltage direct-current transmission of PLC wave filter
The transmission function of line boundary.
For being arranged on the protection device of rectification side, the transient state that extra-high voltage direct-current system rectification side DC bus fault produces
Voltage high frequency component is by arriving protection device installation place after the decay on extra high voltage direct current transmission line border；Extra-high voltage direct-current is defeated
The transient voltage high fdrequency component that line fault produces is pacified by arriving protection device after the decay of extra high voltage direct current transmission line
At dress, circuit is the longest, decays the strongest.
High frequency content attenuation is equal to rectification side by inverter side border with circuit.
The amplitude of extra high voltage direct current transmission line flank pass delivery functionThe decay of energy representative edge bound pair high frequency content is special
Property, extra high voltage direct current transmission line to the decay of high frequency content then by the attenuation quotient of extra high voltage direct current transmission line(line taking
Road propagation coefficientReal part obtain the attenuation quotient of extra high voltage direct current transmission line) and the decision of line length x.So utilizing
The attenuation quotient of extra high voltage direct current transmission lineAmplitude with flank pass delivery function, just can define extra-high direct current defeated
The extra-high DC power transmission line of electric line border and a length of x size to high frequency content attenuation.
The invention has the beneficial effects as follows: can effectively define extra-high DC power transmission line and with border, high frequency content decay be made
Size.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Figure is respectively numbered: 1 be rectification side AC system, 2 be rectifier bridge, 3 be rectification side protection device, 4 for AC line
Road, 5 be inverter bridge, 6 be inverter side AC system, 7 be rectification side smoothing reactor, 8 be inverter side smoothing reactor, 9 for whole
Stream side DC filter, 10 be inverter side DC filter, 11 be rectification side PLC wave filter, 12 be inverter side PLC wave filter,
13 be rectification side grounding device, 14 for inverter side grounding device.
Detailed description of the invention
Embodiment 1: as it is shown in figure 1, a kind of extra high voltage direct current transmission line and border are to high frequency content attenuation size
Confining method, first according to the high frequency transient signal of trouble point on DC lineExtra-high voltage direct-current by a length of x
Transmission line of electricity arrives the high frequency transient signal after protection deviceWith the high frequency transient signal of trouble point on DC lineThe delivery that is divided by obtains extra high voltage direct current transmission line and decays to high frequency content；Then dc bus event is utilized
The high frequency transient signal of barrier pointArrive the high frequency transient after protection device by extra high voltage direct current transmission line border to believe
NumberHigh frequency transient signal with DC bus fault pointThe delivery that is divided by obtains extra-high voltage direct-current transmission border pair
Decaying to of high frequency content；Finally according toWithBetween magnitude relationship realize extra-high voltage direct-current transmission
High frequency content attenuation size is defined by circuit with border.
Described basisWithBetween magnitude relationship realize extra high voltage direct current transmission line and border to height
The confining method of frequency amount attenuation size is as follows:
WhenTime, then it represents that the decay of circuit is less than the decay on border；
WhenTime, then it represents that the decay of circuit is equal to the decay on border；
WhenTime, then it represents that the decay of circuit is more than the decay on border；
In formula: x is extra high voltage direct current transmission line length,For extra high voltage direct current transmission line propagation coefficientReality
Portion,Amplitude for the transmission function on extra high voltage direct current transmission line border.
Embodiment 2: as it is shown in figure 1, a kind of extra high voltage direct current transmission line and border are to high frequency content attenuation size
Confining method, rectification side smoothing reactor 7, rectification side DC filter 9, rectification side PLC wave filter 11 constitute extra-high voltage direct-current
Transmission line of electricity rectification side border, trouble point d on DC line2And the line length between rectification side protection device 3 is.It is provided as
For rectification side DC bus fault point d1With trouble point d on DC line 42High frequency transient signal be same high frequency transient
Signal, trouble point d on DC line 42'sRectification is arrived by the extra high voltage direct current transmission line of a length of x
After side protection device 3, this high frequency transient signal becomes；Rectification side DC bus fault point d1'sBy extra-high
After pressure DC power transmission line rectification side border arrives rectification side protection device 3, this high frequency transient signal becomes, then have；；WillWithIt is divided by respectively in left and right,
To x withBetween relation: when extra high voltage direct current transmission line length x is less thanTime, circuit
To frequency it isThe attenuation of high frequency content is by the attenuation less than border；When extra high voltage direct current transmission line length x is equal toTime, frequency is by circuitThe attenuation of high frequency content is by the attenuation equal to border；When extra-high straightening
Stream transmission line length x is more thanTime, frequency is by circuitThe attenuation of high frequency content will be greater than border
Attenuation.Wherein, x is trouble point d2And the line length between rectification side protection device 3 is x,Defeated for extra-high voltage direct-current
The real part of electric line propagation coefficient, i.e. attenuation quotient,Width for the transmission function on extra high voltage direct current transmission line border
Value.
It addition, high frequency content attenuation defined process and institute in above-described embodiment 2 for inverter side border and circuit
Stating rectification side border, with circuit, high frequency content attenuation to be defined process identical.
Above in conjunction with accompanying drawing, the detailed description of the invention of the present invention is explained in detail, but the present invention is not limited to above-mentioned
Embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible to before without departing from present inventive concept
Put that various changes can be made.
Claims (1)
1. an extra high voltage direct current transmission line and the border confining method to high frequency content attenuation size, it is characterised in that:
First arrived by the extra high voltage direct current transmission line of a length of x according to high frequency transient signal U (j ω) of trouble point on DC line
Reach high frequency transient signal U after protection deviceLBeing divided by takes for (j ω) and high frequency transient signal U (j ω) of trouble point on DC line
Mould obtains extra high voltage direct current transmission line and decays to high frequency content | e-γx|；Then the high frequency utilizing DC bus fault point is temporary
State signal U (j ω) arrives high frequency transient signal U after protection device by extra high voltage direct current transmission line borderB(j ω) is with straight
High frequency transient signal U (j ω) delivery that is divided by of stream bus-bar fault point obtains the decay to high frequency content of the extra-high voltage direct-current transmission border
For | G (j ω) |；Finally according to | e-γx| and the magnitude relationship between | G (j ω) | realizes extra high voltage direct current transmission line and limit
Defining of bound pair high frequency content attenuation size；
Described basis | e-γx| and the magnitude relationship between | G (j ω) | realizes extra high voltage direct current transmission line and border to high frequency
The confining method of amount attenuation size is as follows:
WhenTime, then it represents that the decay of circuit is less than the decay on border；
WhenTime, then it represents that the decay of circuit is equal to the decay on border；
WhenTime, then it represents that the decay of circuit is more than the decay on border；
In formula: x is extra high voltage direct current transmission line length, α is the real part of extra high voltage direct current transmission line propagation coefficient γ, | G (j
ω) | for the amplitude of the transmission function on extra high voltage direct current transmission line border.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310506651.3A CN103543358B (en) | 2013-10-24 | 2013-10-24 | A kind of extra high voltage direct current transmission line and the border confining method to high frequency content attenuation size |
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| CN201310506651.3A CN103543358B (en) | 2013-10-24 | 2013-10-24 | A kind of extra high voltage direct current transmission line and the border confining method to high frequency content attenuation size |
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| CN103543358A CN103543358A (en) | 2014-01-29 |
| CN103543358B true CN103543358B (en) | 2016-08-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201191311Y (en) * | 2008-05-15 | 2009-02-04 | 国网武汉高压研究院 | Transient characteristic experiment apparatus of ultra-high-voltage current transducer |
| CN101860020A (en) * | 2010-06-04 | 2010-10-13 | 昆明理工大学 | Method of boundary element utilizing polar wave S transform energy ratio to determine ultra high-voltage direct current transmission line fault |
| CN102654552A (en) * | 2012-04-16 | 2012-09-05 | 昆明理工大学 | Method for protecting transient voltages at two terminals of super-high voltage direct current transmission line |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2804948B2 (en) * | 1995-06-28 | 1998-09-30 | 中部電力株式会社 | Transmission and distribution line fault detector |
| US8680873B2 (en) * | 2008-08-29 | 2014-03-25 | Abb Research Ltd. | Method and apparatus for fault identification in a power tansmission line |
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2013
- 2013-10-24 CN CN201310506651.3A patent/CN103543358B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201191311Y (en) * | 2008-05-15 | 2009-02-04 | 国网武汉高压研究院 | Transient characteristic experiment apparatus of ultra-high-voltage current transducer |
| CN101860020A (en) * | 2010-06-04 | 2010-10-13 | 昆明理工大学 | Method of boundary element utilizing polar wave S transform energy ratio to determine ultra high-voltage direct current transmission line fault |
| CN102654552A (en) * | 2012-04-16 | 2012-09-05 | 昆明理工大学 | Method for protecting transient voltages at two terminals of super-high voltage direct current transmission line |
Non-Patent Citations (1)
| Title |
|---|
| 一种特高压直流输电线路单端电压暂态保护原理;陈仕龙等;《电力***保护与控制》;20130201;第41卷(第3期);论文第27页左栏第2段-第28页左栏第1段 * |
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