CN103296645B - Distributed constant is utilized to realize line inter-phase fault distance protection method - Google Patents
Distributed constant is utilized to realize line inter-phase fault distance protection method Download PDFInfo
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Abstract
The invention discloses one utilizes distributed constant to realize line inter-phase fault distance protection method.The present invention uses distributed parameter model; utilize the line impedance to phase fault point at the fault voltage between phases of line protection installation place, fault three-phase current and fault alternate negative-sequence current computing electric power line protection seting scope; whether the phase corner of the line impedance judged at line protection setting range to phase fault point sets up in the range of (60 ° 120 °); if setting up; within then judging that phase fault point is positioned at line protection setting range, protection device sends action trip signal.The inventive method physical model uses distributed parameter model, has the ability of natural anti-capacitance current impact, it is adaptable to the relay protecting method of ultra-high/extra-high voltage electric transmission line phase fault.Eliminate the transition resistance impact on Perfomance of protective relaying in the inventive method principle, there is the ability of the strongest anti-transition resistance impact.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, concretely relate to one and utilize distributed constant to realize line inter-phase fault distance protection method.
Background technology
Impedance distance protection is positioned at protection zone according to measuring impedance magnitude faults distance length to distinguish trouble point or is positioned at outside protection zone.Impedance distance protection is due to little by power system operation mode and structural change, and the electric parameters for computation and measurement impedance is total failure component, it is adaptable to whole failure process.Therefore, impedance distance protection can be not only used for ultra-high-tension power transmission line main protection, it is possible to as the back-up protection of ultra-high/extra-high voltage transmission line of electricity.But, impedance distance protection performance is serious by transition Resistance Influence, if mainly showing as the additional impedance that transition resistance produces is resistance sense impedance distance protection tripping when easily causing line protection troubles inside the sample space；If the additional impedance that transition resistance produces be capacitance-resistance when easily causing line protection external area error impedance distance protection action produce and surmount.
The transmission of the voltage of ultra-high/extra-high voltage transmission line of electricity, electric current has obvious wave process, and transmission line of electricity capacitance current along the line is very big, and the impact on impedance distance protection performance can not be ignored.Consider the impact of transmission line of electricity capacitance current along the line, fault impedance and fault distance are hyperbolic tangent function relation, hyperbolic tangent function magnitude-phase characteristics determines impedance relay resistance to transition resistance ability, and the additional impedance that transition resistance is brought will have a strong impact on the performance of impedance relay.Ultra-high/extra-high voltage transmission line of electricity conveying Large Copacity electric energy, is heavy load transmission line of electricity, and heavy load electric current can make the action sensitivity of impedance distance protection reduce, and the impact of impedance distance protection performance can not be ignored by heavy load electric current.
Summary of the invention
It is an object of the invention to the deficiency overcoming prior art to exist, it is provided that the distributed constant that utilizes that a kind of performance is not affected by capacitance current, transition resistance and load current realizes line inter-phase fault distance protection method.
Distributed constant is utilized to realize line inter-phase fault distance protection method, it is characterised in that to include following sequential steps:
(1) the fault voltage between phases of protector measuring line protection installation place, fault three-phase currentNegative-sequence current alternate with fault；Wherein, Φ Φ=AB, BC, CA phase；
(2) to the line impedance Δ z of phase fault point at protection device computing electric power line protection seting scope:
Wherein, lsetFor line protection setting range；Zc1For electric transmission line positive sequence natural impedance；β=Arg(Zc1th(γ1lset))；；Th (.) is hyperbolic tangent function；γ1For electric transmission line positive sequence propagation coefficient；；
(3) protection device judges at line protection setting range, (whether Δ z) falls sets up in the range of (60 ° 120 °) to the phase angle Arg of line impedance Δ z of phase fault point; if setting up; within then judging that phase fault point is positioned at line protection setting range; protection device sends action trip signal, the chopper at tripping transmission line of electricity two ends.
The present invention compared with prior art, has a following positive achievement:
The inventive method physical model uses distributed parameter model, has the ability of natural anti-capacitance current impact, it is adaptable to the relay protecting method of ultra-high/extra-high voltage electric transmission line phase fault.Eliminate the transition resistance impact on Perfomance of protective relaying in the inventive method principle, there is the ability of the strongest anti-transition resistance impact.The load current impact on Perfomance of protective relaying is eliminated in the inventive method principle; during transmission line of electricity heavy service, the inventive method performance is reliable and stable; misoperation will not occur; can effectively prevent the generation of power grid cascading trip accident during electric network swim big transfer, it is ensured that power network safety operation.
Accompanying drawing explanation
Fig. 1 is the multi-line power transmission system schematic of the application present invention.
Detailed description of the invention
Below in conjunction with embodiment, technical scheme is expressed in further detail.
Fig. 1 is the multi-line power transmission system schematic of the application present invention.In Fig. 1 CVT be voltage transformer, CT be current transformer.Protection device carries out sampling and obtains voltage, current instantaneous value the current waveform of the potential and current transformers CT of the voltage transformer CVT of line protection installation place, and voltage, current instantaneous value that then it is collected by protection device utilize Fourier algorithm computing electric power line to protect the fault voltage between phases of installation place, fault three-phase currentNegative-sequence current alternate with fault；Wherein, Φ Φ=AB, BC, CA phase.
To the line impedance Δ z of phase fault point at protection device computing electric power line protection seting scope:
Wherein, lsetFor line protection setting range；Zc1For electric transmission line positive sequence natural impedance；β=Arg(Zc1th(γ1lset))；；Th (.) is hyperbolic tangent function；γ1For electric transmission line positive sequence propagation coefficient；。
Protection device judges at line protection setting range, (whether Δ z) falls sets up in the range of (60 ° 120 °) to the phase angle Arg of line impedance Δ z of phase fault point; if setting up; within then judging that phase fault point is positioned at line protection setting range; protection device sends action trip signal, the chopper at tripping transmission line of electricity two ends.
The inventive method physical model uses distributed parameter model, has the ability of natural anti-capacitance current impact, it is adaptable to the relay protecting method of ultra-high/extra-high voltage electric transmission line phase fault.Eliminate the transition resistance impact on Perfomance of protective relaying in the inventive method principle, there is the ability of the strongest anti-transition resistance impact.The load current impact on Perfomance of protective relaying is eliminated in the inventive method principle; during transmission line of electricity heavy service, the inventive method performance is reliable and stable; misoperation will not occur; can effectively prevent the generation of power grid cascading trip accident during electric network swim big transfer, it is ensured that power network safety operation.
The foregoing is only the preferred embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement, all should contain within protection scope of the present invention.
Claims (1)
1. utilize distributed constant to realize line inter-phase fault distance protection method, it is characterised in that to include following sequential steps:
(1) protection device carries out sampling and obtains voltage, current instantaneous value the current waveform of the potential and current transformers CT of the voltage transformer CVT of line protection installation place, and voltage, current instantaneous value that then it is collected by protection device utilize Fourier algorithm computing electric power line to protect the fault voltage between phases of installation placeFault three-phase currentNegative-sequence current alternate with faultWherein, φ φ=AB, BC, CA phase；
(2) to the line impedance Δ z of phase fault point at protection device computing electric power line protection seting scope:
Wherein, lsetFor line protection setting range；Zc1For electric transmission line positive sequence natural impedance；β=Arg (Zc1th(γ1lset))；Th (.) is hyperbolic tangent function；γ1For electric transmission line positive sequence propagation coefficient；
(3) protection device judges that at line protection setting range, (Δ z) falls at (60 ° to the phase angle Arg of line impedance Δ z of phase fault point; 120 °) in the range of whether set up; if setting up; within then judging that phase fault point is positioned at line protection setting range; protection device sends action trip signal, the chopper at tripping transmission line of electricity two ends.
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| CN201310184829.7A CN103296645B (en) | 2013-05-19 | 2013-05-19 | Distributed constant is utilized to realize line inter-phase fault distance protection method |
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| CN201310184829.7A CN103296645B (en) | 2013-05-19 | 2013-05-19 | Distributed constant is utilized to realize line inter-phase fault distance protection method |
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| CN103296645B true CN103296645B (en) | 2016-08-03 |
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| CN104316842B (en) * | 2014-11-14 | 2017-04-26 | 国家电网公司 | Line phase fault single-ended distance measurement method by means of phase fault position factor phase characteristic |
| CN113064022B (en) * | 2021-03-12 | 2022-04-29 | 国网河南省电力公司电力科学研究院 | Line protection method based on transition resistance calculation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6459960B1 (en) * | 1998-10-14 | 2002-10-01 | Kabushiki Kaisha Toshiba | Distance relay equipment |
| CN101173975A (en) * | 2007-11-29 | 2008-05-07 | 北京四方继保自动化股份有限公司 | Method for implementing distance measurement between two ends of electric transmission line using interphase electrical quantities |
| CN102354962A (en) * | 2011-09-01 | 2012-02-15 | 西安交通大学 | Distance protection method making use of voltage distribution under distributed parameter model |
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2013
- 2013-05-19 CN CN201310184829.7A patent/CN103296645B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6459960B1 (en) * | 1998-10-14 | 2002-10-01 | Kabushiki Kaisha Toshiba | Distance relay equipment |
| CN101173975A (en) * | 2007-11-29 | 2008-05-07 | 北京四方继保自动化股份有限公司 | Method for implementing distance measurement between two ends of electric transmission line using interphase electrical quantities |
| CN102354962A (en) * | 2011-09-01 | 2012-02-15 | 西安交通大学 | Distance protection method making use of voltage distribution under distributed parameter model |
Non-Patent Citations (2)
| Title |
|---|
| 一种基于分布参数模型的线路相间距离保护方法;马静等;《电力系统保护与控制》;20120216;第40卷(第4期);第32-36页 * |
| 基于分布参数模型的高压直流输电线路距离保护;索南加乐等;《电力系统自动化》;20110425;第35卷(第8期);第53-57页 * |
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