CN105759170A - Power transmission line ground fault phase selection method resistant to transition resistance influence - Google Patents
Power transmission line ground fault phase selection method resistant to transition resistance influence Download PDFInfo
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- CN105759170A CN105759170A CN201610184889.2A CN201610184889A CN105759170A CN 105759170 A CN105759170 A CN 105759170A CN 201610184889 A CN201610184889 A CN 201610184889A CN 105759170 A CN105759170 A CN 105759170A
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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
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention discloses a power transmission line ground fault phase selection method resistant to transition resistance influence. The method is characterized by forming a criterion by using a phase relation between zero-sequence current and phase-A negative-sequence current and a magnitude relation between inter-phase fault impedance and setting impedance to distinguish between a single-phase grounding short circuit fault and a two-phase grounding short circuit fault; and forming a criterion by using the phase relation between zero-sequence current and phase-A negative-sequence current to distinguish between the two-phase grounding short circuit fault and a two-phase high resistance grounding short circuit fault. If a power transmission line is subjected to a high resistance grounding short circuit fault when a weak power side and a system operation mode are changed a lot, the method has high phase selection sensitivity, may accurately determine a specific grounding fault phase, is suitable for fault phase selection in a whole power transmission line grounding short circuit fault, may provide correct and reliable fault phase information for distance protection and an automatic reclosing correct action.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, concretely relate to the transmission lines earth fault phase-selecting method of a kind of anti-transition resistance impact.
Background technology
Power transmission line fault phase selection mainly includes difference of phase currents phase selection, phase voltage Sudden Changing Rate phase selection and the comprehensive phase-selecting method of voltage x current Sudden Changing Rate.At light current source, difference of phase currents phase selection insufficient sensitivity is high；At forceful electric power source, phase voltage Sudden Changing Rate phase selection sensitivity Shortcomings；Although the comprehensive phase-selecting method of voltage x current Sudden Changing Rate all has better phase selection sensitivity at light current source and forceful electric power source, but in three phase short circuit fault phase selection sensitivity Shortcomings.Owing to difference of phase currents phase selection, phase voltage Sudden Changing Rate phase selection and the comprehensive phase-selecting method of voltage x current Sudden Changing Rate all adopt Comparison of Sudden Changing Rate of Power Frequency Components to participate in computing, power frequency variation only exists in two cycles after transmission line malfunction again, therefore, difference of phase currents phase selection, phase voltage Sudden Changing Rate phase selection and the comprehensive phase-selecting method of voltage x current Sudden Changing Rate are all only applicable to the Fault Phase Selection in two cycles after transmission line malfunction, it is impossible to suitable in the transmission line of electricity high resistance ground short trouble phase selection of climbing.
Transmission line malfunction phase selection correctness is related to that the correct operation of transmission line distance protecting and auto recloser is whether; reinforcement relay protection of transmission line action correctness and reliability had particularly significant impact; therefore, study a kind of under light current source and system operation mode generation large change situation, all there is sufficiently high phase selection sensitivity, singlephase earth fault can be accurately distinguished, the transmission lines earth fault phase-selecting method tool of two-phase short circuit and ground fault and biphase high resistance ground short trouble is of great significance.
Summary of the invention
It is an object of the invention to the deficiency overcoming prior art to exist, it is provided that a kind of under light current source and system operation mode generation large change situation, all there is sufficiently high phase selection sensitivity, singlephase earth fault can be accurately distinguished, the transmission lines earth fault phase-selecting method of the anti-transition resistance impact of two-phase short circuit and ground fault and biphase high resistance ground short trouble.
For completing above-mentioned purpose, the present invention adopts the following technical scheme that
The transmission lines earth fault phase-selecting method of anti-transition resistance impact, it is characterized by, and comprises the following steps that
(1) residual voltage of protector measuring line protection installation placeZero-sequence currentA phase negative sequence voltageA phase negative-sequence currentA phase voltageB phase voltageC phase voltageWith A phase currentB phase currentC phase current
(2) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as A phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(3) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as BC phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(4) protection device judgesAndWhether set up, if setting up, then protection device is judged as AB phase transmission line of electricity generation high resistance ground short trouble；
(5) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as B phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(6) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as CA phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ImForImaginary part；
(7) protection device judgesAndWhether set up, if setting up, then protection device is judged as BC phase transmission line of electricity generation high resistance ground short trouble；
(8) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as C phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(9) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as AB phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(10) protection device judgesAndWhether set up, if setting up, then protection device is judged as CA phase transmission line of electricity generation high resistance ground short trouble.
The present invention compared with prior art, has following positive achievement:
The inventive method constitutes criterion first with the phase relation between zero-sequence current with A phase negative-sequence current and phase-to phase fault impedance and the magnitude relationship adjusted between impedance and distinguishes single-phase grounding fault and two-phase short circuit and ground fault, then utilizes the phase relation between residual voltage with A phase negative sequence voltage to constitute criterion and distinguishes two-phase short circuit and ground fault and biphase high resistance ground short trouble.Under light current source and system operation mode generation large change situation during transmission line of electricity generation high resistance ground short trouble; the inventive method all has sufficiently high phase selection sensitivity; concrete earth fault phase can be accurately judged to; suitable in the Fault Phase Selection of the whole failure process of transmission line of electricity ground short circuit fault, correct fault phase information reliably can be provided for distance protection and automatic reclosing correct 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 according to Figure of description, 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 is voltage transformer, CT is current transformer.The current waveform of the potential and current transformers CT of the voltage transformer CVT of line protection installation place is carried out sampling and obtains voltage, current instantaneous value by protection device, and voltage, current instantaneous value that then it is collected by protection device utilize Fourier algorithm computing electric power line to protect the residual voltage of installation placeZero-sequence currentA phase negative sequence voltageA phase negative-sequence currentA phase voltageB phase voltageC phase voltageWith A phase currentB phase currentC phase current
Protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as A phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part.
Protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as BC phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part.
Protection device judgesAndWhether set up, if setting up, then protection device is judged as AB phase transmission line of electricity generation high resistance ground short trouble.
Protection device judgesAndAndWhether set up, if setting up, then protection device is judged as B phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part.
Protection device judgesAndAndWhether set up, if setting up, then protection device is judged as CA phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part.
Protection device judgesAndWhether set up, if setting up, then protection device is judged as BC phase transmission line of electricity generation high resistance ground short trouble.
Protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as C phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part.
Protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as AB phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part.
Protection device judgesAndWhether set up, if setting up, then protection device is judged as CA phase transmission line of electricity generation high resistance ground short trouble.
The inventive method constitutes criterion first with the phase relation between zero-sequence current with A phase negative-sequence current and phase-to phase fault impedance and the magnitude relationship adjusted between impedance and distinguishes single-phase grounding fault and two-phase short circuit and ground fault, then utilizes the phase relation between residual voltage with A phase negative sequence voltage to constitute criterion and distinguishes two-phase short circuit and ground fault and biphase high resistance ground short trouble.Under light current source and system operation mode generation large change situation during transmission line of electricity generation high resistance ground short trouble; the inventive method all has sufficiently high phase selection sensitivity; concrete earth fault phase can be accurately judged to; suitable in the Fault Phase Selection of the whole failure process of transmission line of electricity ground short circuit fault, correct fault phase information reliably can be provided for distance protection and automatic reclosing correct 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 be encompassed within protection scope of the present invention.
Claims (1)
1. the transmission lines earth fault phase-selecting method of anti-transition resistance impact, it is characterised in that comprise the steps:
(1) residual voltage of protector measuring line protection installation placeZero-sequence currentA phase negative sequence voltageA phase negative-sequence currentA phase voltageB phase voltageC phase voltageWith A phase currentB phase currentC phase current
(2) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as A phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(3) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as BC phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(4) protection device judgesAndWhether set up, if setting up, then protection device is judged as AB phase transmission line of electricity generation high resistance ground short trouble；
(5) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as B phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(6) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as CA phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(7) protection device judgesAndWhether set up, if setting up, then protection device is judged as BC phase transmission line of electricity generation high resistance ground short trouble；
(8) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as C phase transmission line of electricity generation singlephase earth fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(9) protection device judgesAndAnd Whether set up, if setting up, then protection device is judged as AB phase transmission line of electricity generation ground short circuit fault；Wherein, lsetFor line protection setting range；x1For unit length transmission line of electricity reactance value；ForImaginary part；
(10) protection device judgesAndWhether set up, if setting up, then protection device is judged as CA phase transmission line of electricity generation high resistance ground short trouble.
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| CN201610184889.2A CN105759170B (en) | 2016-03-29 | 2016-03-29 | The transmission lines earth fault phase-selecting method that anti-transition resistance influences |
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| CN201610184889.2A CN105759170B (en) | 2016-03-29 | 2016-03-29 | The transmission lines earth fault phase-selecting method that anti-transition resistance influences |
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| CN105759170B CN105759170B (en) | 2019-02-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445351A (en) * | 2018-03-19 | 2018-08-24 | 南京正浩电气科技有限公司 | A kind of transmission line of electricity distance measuring method |
| CN109444640A (en) * | 2018-11-28 | 2019-03-08 | 南京国电南自电网自动化有限公司 | A kind of power distribution network single-phase high-impedance detection method, system and storage medium |
| CN109507516A (en) * | 2018-11-28 | 2019-03-22 | 南京国电南自软件工程有限公司 | Earth-fault detecting method, system and storage medium based on steady state fault amount |
| CN109669093A (en) * | 2018-12-13 | 2019-04-23 | 南京正锐电力科技有限公司 | A kind of non-effectively earthed system line-to-ground fault detection method |
| CN114994465A (en) * | 2022-08-01 | 2022-09-02 | 西安兴汇电力科技有限公司 | Single-phase high-resistance grounding criterion method based on impedance triangle type high-voltage overhead line |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5475556A (en) * | 1991-04-18 | 1995-12-12 | Korea Electric Power Corporation | Apparatus for detecting high impedance fault |
| CN1440102A (en) * | 2003-01-09 | 2003-09-03 | 西安交通大学 | High voltage circuit phase selection based on pallern identification |
| CN1655417A (en) * | 2004-12-01 | 2005-08-17 | 山东积成电子股份有限公司 | High tension transmission line fast distance protection method based on window-varying vector |
| CN101038316A (en) * | 2007-04-23 | 2007-09-19 | 国电南京自动化股份有限公司 | Circuit protection order component phase selectiing method using both end information |
| CN102769279A (en) * | 2012-07-23 | 2012-11-07 | 国电南瑞科技股份有限公司 | High-resistance grounding phase selection method for longitudinal zero-sequence protection of line protection device |
| CN103368151A (en) * | 2013-06-18 | 2013-10-23 | 国家电网公司 | Method of realizing line-to-ground fault phase selection by using sequence voltage phase characteristic |
| CN103746352A (en) * | 2013-12-26 | 2014-04-23 | 北京四方继保自动化股份有限公司 | Line protection phase selection method not influenced by operation mode |
-
2016
- 2016-03-29 CN CN201610184889.2A patent/CN105759170B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5475556A (en) * | 1991-04-18 | 1995-12-12 | Korea Electric Power Corporation | Apparatus for detecting high impedance fault |
| CN1440102A (en) * | 2003-01-09 | 2003-09-03 | 西安交通大学 | High voltage circuit phase selection based on pallern identification |
| CN1655417A (en) * | 2004-12-01 | 2005-08-17 | 山东积成电子股份有限公司 | High tension transmission line fast distance protection method based on window-varying vector |
| CN101038316A (en) * | 2007-04-23 | 2007-09-19 | 国电南京自动化股份有限公司 | Circuit protection order component phase selectiing method using both end information |
| CN102769279A (en) * | 2012-07-23 | 2012-11-07 | 国电南瑞科技股份有限公司 | High-resistance grounding phase selection method for longitudinal zero-sequence protection of line protection device |
| CN103368151A (en) * | 2013-06-18 | 2013-10-23 | 国家电网公司 | Method of realizing line-to-ground fault phase selection by using sequence voltage phase characteristic |
| CN103746352A (en) * | 2013-12-26 | 2014-04-23 | 北京四方继保自动化股份有限公司 | Line protection phase selection method not influenced by operation mode |
Non-Patent Citations (2)
| Title |
|---|
| 林湘宁,等: "基于相关分析的故障序分量选相元件", 《中国电机工程学报》 * |
| 鲍小鹏,张举: "微机保护中几种序分量选相方法的比较", 《供用电》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445351A (en) * | 2018-03-19 | 2018-08-24 | 南京正浩电气科技有限公司 | A kind of transmission line of electricity distance measuring method |
| CN109444640A (en) * | 2018-11-28 | 2019-03-08 | 南京国电南自电网自动化有限公司 | A kind of power distribution network single-phase high-impedance detection method, system and storage medium |
| CN109507516A (en) * | 2018-11-28 | 2019-03-22 | 南京国电南自软件工程有限公司 | Earth-fault detecting method, system and storage medium based on steady state fault amount |
| CN109669093A (en) * | 2018-12-13 | 2019-04-23 | 南京正锐电力科技有限公司 | A kind of non-effectively earthed system line-to-ground fault detection method |
| CN114994465A (en) * | 2022-08-01 | 2022-09-02 | 西安兴汇电力科技有限公司 | Single-phase high-resistance grounding criterion method based on impedance triangle type high-voltage overhead line |
| CN114994465B (en) * | 2022-08-01 | 2022-11-22 | 西安兴汇电力科技有限公司 | Impedance triangle-based high-voltage overhead line single-phase high-resistance grounding criterion method |
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