CN107832561A - The analysis method that a kind of HVDC transmission line influences on communication line - Google Patents
The analysis method that a kind of HVDC transmission line influences on communication line Download PDFInfo
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- CN107832561A CN107832561A CN201711226577.4A CN201711226577A CN107832561A CN 107832561 A CN107832561 A CN 107832561A CN 201711226577 A CN201711226577 A CN 201711226577A CN 107832561 A CN107832561 A CN 107832561A
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention discloses the analysis method that a kind of HVDC transmission line influences on communication line, the electromagnetic transient simulation model that transmission line of electricity influences on communication line is established by PSCAD/EMTDC, interference effect and dangerous influence of the simulation analysis DC power transmission line to communication line, and the verification method of interference effect and dangerous influence and the limits of each influence factor are proposed, provide reference for design of the HVDC transmission line to communication line.
Description
Technical field
The present invention relates to HVDC transmission system field, and in particular to a kind of HVDC transmission line is to communication line
The analysis method of influence.
Background technology
Influence of the HVDC transmission system to communication line, which is mainly reflected in, influences communication quality, communication equipment and the person
Safety, its influence mode are embodied in HVDC transmission line and induced voltage are produced on communication line.Therefore in HVDC
Transmission line of electricity is intended to consider influence to each other with the communication line design planning stage.
In design early stage of HVDC transmission line, the arrangement of adjacent communication circuit is typically first investigated, passes through engineering
Calculation formula calculates whether HVDC transmission system may can exceed standard limit by caused induced voltage on communication line
Value, finally to determine the spacing of circuit.In addition, if HVDC transmission system inevitably causes shadow to communication line
Ring, then shield effectiveness can be improved on communication line, but this can increase communication line investment.
The induced voltage on communication line is mainly obtained by calculation formula and measured data at present, and advantage is to facilitate
Result quickly is obtained, but engineering calculation formulas computational accuracy is limited, it is necessary to propose a kind of more accurate simulating analysis.
The content of the invention
In order to overcome shortcoming and deficiency existing for prior art, the present invention provides a kind of HVDC transmission line to communication
The analysis method of line influence.
The present invention adopts the following technical scheme that：
The analysis method that a kind of HVDC transmission line influences on communication line, comprises the following steps：
S1 distinguishes computing electric power line and led to according to actual transmission line of electricity and the structural parameters and arrangement of communication line
Believe the mutual inductance between the resistance, inductance and transmission line of electricity and communication line of circuit；
S2 builds the electromagnetic transient simulation model that transmission line of electricity influences on communication line, the electricity in PSCAD/EMTDC
Magnetic Transient simulation model is specifically the two line mutual coupling circuit models that input is current source；
Electromagnetic transient simulation models of the S3 based on S2, influence of the simulation analysis DC power transmission line to communication line, specifically
For：
Interference effect of the DC power transmission line to communication line is analyzed, is specially：Current source is arranged to DC power transmission system
The standard limit value of system equivalent disturbing current, simulation calculation obtains cacophony electromotive force on communication line, and is carried out with standard limit
Contrast, is that DC power transmission line interferes influence on communication line higher than standard limit value；
Dangerous influence of the DC power transmission line to communication line is analyzed, is specially：Current source is arranged to short circuit current, imitated
Induced longitudinal electromotive force on communication line really is calculated, and is contrasted with standard limit, is direct current higher than standard limit value
Transmission line of electricity causes dangerous influence to communication line.
The short circuit current is arranged to three times of DC transmission system rated current.
Also include the simulation result according to S3 steps, by changing different parameters, simulation analysis different affecting factors are to logical
Believe the influence of induced voltage on circuit, the influence factor includes soil resistivity, circuit spacing, parallel length and the angle of the crossing
Degree.
Mutual inductance between the circuit includes the mutual inductance and transmission line of electricity and communication of transmission line of electricity and communication line parallel task scheduling
The near mutual inductance of circuit mitered.
The structural parameters include the spacing of transmission line of electricity and communication line, the folder between transmission line of electricity and communication line
Angle, the parallel length between transmission line of electricity and communication line, the arrangement include parallel and non-parallel situation.
Beneficial effects of the present invention：
The present invention proposes replaces equivalent disturbing current and short circuit current to carry out high-voltage dc transmission electric wire with influence current source
The simulation means that road influences on communication line, and propose the verification method of interference effect and dangerous influence and each influence factor
Limits, reference is provided for design of the HVDC transmission line to communication line.
Brief description of the drawings
Fig. 1 is the workflow diagram of the present invention；
Fig. 2 is the locus figure of transmission line of electricity and communication line in the present embodiment；
Fig. 3 is two line mutual coupling circuit models of transmission line of electricity and communication line；
Influence of the DC power transmission line to communication line when Fig. 4 is different circuit spacing.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As shown in figure 1, the analysis method that a kind of HVDC transmission line influences on communication line, comprises the following steps：
S1 joins according to the structure of waxy common wheat power transmission Guangdong ± 800kV DC transmission engineerings transmission line of electricity and local telephone communication circuit
Number and arrangement, as shown in Figure 2.Calculate transmission line of electricity and communication line resistance and inductance；And according to《Direct current is maked somebody a mere figurehead defeated
Electric line is to telecommunication line danger and interference effect protection Design code》Mutual inductance calculating side between middle transmission line of electricity and communication line
Method, calculate transmission line of electricity and communication line mutual inductance.
D represents the spacing of transmission line of electricity and communication line in Fig. 2；L represents the parallel length between circuit；θ is represented between circuit
Angle；ρ represents ground resistivity.
S2 builds the electromagnetic transient simulation model that transmission line of electricity influences on communication line, the electricity in PSCAD/EMTDC
Magnetic Transient simulation model is specifically the two line mutual coupling circuit models that input is current source, as shown in figure 3, wherein two line mutual coupling
Zygonema road model parameter takes resistance, inductance and the mutual inductance that S1 steps are calculated, and influences the equivalent interference of electric current source-representation in Fig. 3
Electric current or short circuit current；Due to when transmission line of electricity is vertical with communication line, there is no mutual inductance between transmission line of electricity and communication line,
It is connected on communication line and is represented with 10E8 resistance, the influence electric current on transmission line of electricity will not produces induced voltage on vertical section；
Because when transmission line of electricity is parallel with communication line, m represents the mutual inductance between transmission line of electricity and communication line.
When simulation analysis DC power transmission line is to transmission line of electricity interference effect, influences current source and take DC power transmission line etc.
The standard limit value of interference electric current is imitated, for the limit of waxy common wheat power transmission Guangdong ± 800kV DC power transmission line equivalent disturbing currents
Value standard is 2000mA, therefore influences current source and take 2000mA.
When simulation analysis DC power transmission line influences on communication line, current source is arranged to the specified electricity of DC transmission system
Three times of stream, are 3125A for waxy common wheat power transmission Guangdong ± 800kV DC transmission engineerings system nominal current, therefore influence electricity
Stream source takes 9375A.
Electromagnetic transient simulation models of the S3 based on S2, influence of the simulation analysis DC power transmission line to communication line, specifically
For：
Interference effect of the DC power transmission line to communication line is analyzed, is specially：Current source is arranged to DC power transmission system
The standard limit value of system equivalent disturbing current, simulation calculation obtains cacophony electromotive force on communication line, and is carried out with standard limit
Contrast, is that DC power transmission line interferes influence on communication line higher than standard limit value；
Induced voltage on simulation calculation communication line in the present embodiment, obtaining cacophony electromotive force on communication line is
2.75mV.In national standard DL/T5033-2006《Transmission line of electricity is to communication line danger and interference effect protection Design code》
It is middle regulation local telephone communication circuit interference effect permissible value be 4.5mV, therefore in this case DC power transmission line to communicate
Circuit will not produce interference effect.
Dangerous influence of the DC power transmission line to communication line is analyzed, is specially：Current source is arranged to short circuit current, imitated
Induced longitudinal electromotive force on communication line really is calculated, and is contrasted with standard limit, is direct current higher than standard limit value
Transmission line of electricity causes dangerous influence to communication line.
In the present embodiment, induced voltage on simulation calculation communication line, it is 2.71kV to obtain induced voltage on communication line.
In national standard DL/T5033-2006《Transmission line of electricity is to communication line danger and interference effect protection Design code》Middle regulation city
The dangerous influence permissible value for talking about communication line is 5.1kV, therefore DC power transmission line will not to communication line in this case
Produce dangerous influence.
Above-mentioned limitation standard value all in accordance with《Direct-current overhead power transmission line is to telecommunication line danger and interference effect protection Design
Code》Setting.
Simulation results of the S4 based on S3 steps, by changing different parameters, simulation analysis different affecting factors are to order wire
The influence of induced voltage on road, including the factor such as soil resistivity, circuit spacing, parallel length and intersecting angle, and combine dry
The limits for influenceing that above-mentioned each influence factor is proposed with dangerous influence standard limit are disturbed, wherein the direct current in different circuit spacing
Influence of the transmission line of electricity to communication line is as shown in Figure 4.
Fig. 4 represent under the spacing of different transmission lines of electricity and communication line, on communication line caused cacophony electromotive force and
Induced longitudinal electromotive force size, i.e., interference effect and dangerous influence simulation result figure on communication line.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (5)
1. the analysis method that a kind of HVDC transmission line influences on communication line, it is characterised in that comprise the following steps：
S1 distinguishes computing electric power line and order wire according to actual transmission line of electricity and the structural parameters and arrangement of communication line
Mutual inductance between the resistance on road, inductance and transmission line of electricity and communication line；
S2 builds the electromagnetic transient simulation model that transmission line of electricity influences on communication line in PSCAD/EMTDC, and the electromagnetism is temporary
State simulation model is specifically the two line mutual coupling circuit models that input is current source；
Electromagnetic transient simulation models of the S3 based on S2, influence of the simulation analysis DC power transmission line to communication line, it is specially：
Interference effect of the DC power transmission line to communication line is analyzed, is specially：Current source is arranged to DC transmission system etc.
The standard limit value of interference electric current is imitated, simulation calculation obtains cacophony electromotive force on communication line, and is contrasted with standard limit,
It is that DC power transmission line interferes influence on communication line higher than standard limit value；
Dangerous influence of the DC power transmission line to communication line is analyzed, is specially：Current source is arranged to short circuit current, emulation meter
Calculation obtains induced longitudinal electromotive force on communication line, and is contrasted with standard limit, is direct current transportation higher than standard limit value
Circuit causes dangerous influence to communication line.
2. analysis method according to claim 1, it is characterised in that the short circuit current is arranged to DC transmission system volume
Determine electric current three times.
3. analysis method according to claim 1, it is characterised in that also include the simulation result according to S3 steps, pass through
Change different parameters, influence of the simulation analysis different affecting factors to induced voltage on communication line, the influence factor includes
Soil resistivity, circuit spacing, parallel length and intersecting angle.
4. analysis method according to claim 1, it is characterised in that the mutual inductance between the circuit includes transmission line of electricity with leading to
Believe the close mutual inductance of line parallel and transmission line of electricity and the near mutual inductance of telecommunication circuit mitered.
5. analysis method according to claim 1, it is characterised in that the structural parameters include transmission line of electricity and order wire
The spacing on road, the angle between transmission line of electricity and communication line, the parallel length between transmission line of electricity and communication line.
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