CN103293440B - Using sequence components to achieve single-line terminal GROUND FAULT LOCATION METHOD - Google Patents

Using sequence components to achieve single-line terminal GROUND FAULT LOCATION METHOD Download PDF

Info

Publication number
CN103293440B
CN103293440B CN 201310185058 CN201310185058A CN103293440B CN 103293440 B CN103293440 B CN 103293440B CN 201310185058 CN201310185058 CN 201310185058 CN 201310185058 A CN201310185058 A CN 201310185058A CN 103293440 B CN103293440 B CN 103293440B
Authority
CN
Grant status
Grant
Patent type
Prior art keywords
phase
single
fault
transmission line
zero
Prior art date
Application number
CN 201310185058
Other languages
Chinese (zh)
Other versions
CN103293440A (en )
Inventor
林富洪
曾惠敏
Original Assignee
国家电网公司
福建省电力有限公司
福建省电力有限公司莆田电业局
福建省电力有限公司检修分公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

Links

Abstract

本发明公开了一种利用序分量实现线路单相接地故障单端测距方法。 The present invention discloses a method of using single-end sequence component Location Method FAULT line single phase. 本发明方法首先将输电线路单相接地故障点的负序电压转化为等效零序电压,根据输电线路单相接地故障点的零序电压与等效零序电压相等这一故障特征精确计算故障距离,实现了输电线路单相接地故障的单端测距。 The method of the present invention will first transmission line single-phase ground fault point into the equivalent negative sequence voltage zero sequence voltage, characterized in that accurate calculation of fault according to fault zero sequence voltage transmission line single-phase ground fault point and the zero-sequence voltage is equal to the equivalent distance, to achieve a single ended transmission line ranging single-phase ground fault. 本发明方法根据输电线路沿线零序电压分布特性实现输电线路单相接地故障单端测距,原理上消除了过渡电阻对测距精度的影响,不受负荷电流和故障位置的影响,具有很高的测距精度。 The method of the present invention is to achieve a single-ended single-phase ground fault distance transmission line characteristics in accordance with zero-sequence voltage distribution along the transmission line, eliminating the influence of transition resistance on the principle of distance measurement accuracy, not affected by the load current and fault location, having high the ranging accuracy. 本发明方法测距原理简单,程序实现容易,且无需采用搜索算法直接计算故障距离,测距速度快,实时性强。 The method of the present invention ranging principle is simple, easy to implement a program, and search algorithm calculates the fault distance directly, ranging fast speed, real-time without using. <!--1--> <-! 1-->

Description

利用序分量实现线路单相接地故障单端测距方法 Using sequence components to achieve single-line terminal GROUND FAULT LOCATION METHOD

技术领域 FIELD

[0001] 本发明设及电力系统继电保护技术领域,具体地说是设及一种利用序分量实现线路单相接地故障单端测距方法。 [0001] Technical Field The present invention is provided and power system protection, and in particular is provided utilizing sequence line component to achieve a single-ended single-phase ground fault distance method.

背景技术 Background technique

[0002] 输电线路单端故障测距方法仅利用输电线路一端电气量进行故障定位,无须通讯和数据同步设备,运行费用低且算法稳定,在输电线路中获得广泛应用。 [0002] of transmission line fault location method using only an amount of electric power transmission line end fault location without communications equipment and data synchronization, low operating costs and stable algorithm, widely used in power transmission lines. 单端故障测距方法主要分为行波法和阻抗法。 Single-ended fault location methods and divided into traveling wave impedance method. 行波法利用故障暂态行波的传送性质进行单端故障测距,精度高,不受运行方式、过渡电阻等影响,但对采样率要求很高,需要专口的录波装置,应用成本高。 Bo Fali row single-ended fault location with the transmission line nature of the fault transient wave, high precision is not affected by operating mode, transition resistance, etc., but it requires high sampling rate, recording wave device requires special port, the cost of application high. 阻抗法利用故障后的电压、电流量计算故障回路阻抗,根据线路长度与阻抗成正比的特性进行单端故障测距,简单可靠,但测距精度受到过渡电阻和负荷电流等因素影响严重,尤其过渡电阻较大时,因过渡电阻引起的附加故障距离的影响,故障距离测量结果会严重偏离真实故障距离,甚至出现故障测距失败。 Impedance method using a voltage fault, the fault loop impedance calculated current, single-ended fault location according to the characteristic impedance of the line is proportional to the length, simple and reliable, but the ranging precision is the transition resistance and other factors severely affect the load current, in particular when the transition resistance is large, the influence due to the additional distance to fault transition resistance caused serious fault distance measurement results deviate from the real distance to fault, fault location or even failure.

发明内容 SUMMARY

[0003] 本发明的目的在于克服已有技术存在的不足,提供一种测距精度不受过渡电阻、 负荷电流和故障位置影响的利用序分量实现线路单相接地故障单端测距方法。 [0003] The object of the present invention is to overcome the shortcomings of the prior art, to provide a range accuracy is not using the transition component resistor sequence, the influence of load current and fault location of the line to achieve a single-ended single-phase ground fault distance method.

[0004] 利用序分量实现线路单相接地故障单端测距方法,其特征在于,包括如下依序步骤: [0004] The use of a single-ended sequence component Location Method FAULT line single phase characterized by comprising the sequential steps of:

[0005] (1)保护装置测量输电线路保护安装处的故障相负序电压故障相负序电流/一、零序电拒0。 [0005] (1) installed at a protection fault protection means for measuring the phase negative sequence voltage transmission line fault phase negative sequence current / a, 0 zero sequence repellent. 和零序电流/〇;其中,Φ为A相、B相、C相; And zero sequence current / square; where, Φ is the A phase, B phase, C phase;

[0006] (2)保护装置计算输电线路保护安装处到单相接地故障点的故障距离 [0006] Transmission line protection fault distance calculation is mounted to the single-phase ground fault point (2) protective means

Figure CN103293440BD00031

其中,Φ为A相、B相、C相;Z1为单位长度输电线路正序阻抗;Z0为单位长度输电线路零序阻抗;为故障相负序电压;为故障相负序电流;巧)为零序电压;4为零序电流。 Wherein, Φ is the A phase, B phase, C phase; Zl per unit length of transmission line the positive sequence impedance; Z0 of unit length transmission line zero-sequence impedance; fault phase negative sequence voltage; fault phase negative sequence current; Qiao) of zero sequence voltage; 4 is zero-sequence current.

[0007] 本发明与现有技术相比较,具有W下积极成果: [0007] The present invention compared with the prior art, the W having a positive result:

[000引本发明方法首先将输电线路单相接地故障点的负序电压转化为等效零序电压,根据输电线路单相接地故障点的零序电压与等效零序电压相等运一故障特征精确计算故障距离,实现了输电线路单相接地故障的单端测距。 [000 The method of the present invention is incorporated will be first transmission line single-phase ground fault point into the equivalent negative sequence voltage zero-sequence voltage, zero-sequence voltage transmission line in accordance with single-phase ground fault point and the zero sequence voltage equivalent to a fault characteristic equalities accurate calculation of the fault distance, to achieve a single-ended single-phase ground fault distance transmission lines. 本发明方法根据输电线路沿线零序电压分布特性实现输电线路单相接地故障单端测距,原理上消除了过渡电阻对测距精度的影响,不受负荷电流和故障位置的影响,具有很高的测距精度。 The method of the present invention is to achieve a single-ended single-phase ground fault distance transmission line characteristics in accordance with zero-sequence voltage distribution along the transmission line, eliminating the influence of transition resistance on the principle of distance measurement accuracy, not affected by the load current and fault location, having high the ranging accuracy. 本发明方法测距原理简单,程序实现容易,且无需采用捜索算法直接计算故障距离,测距速度快,实时性强。 The method of the present invention ranging principle is simple, easy to implement the program, and Dissatisfied cable fault distance calculation algorithm directly, without using a fast ranging speed, and real time.

附图说明 BRIEF DESCRIPTION

[0009] 图1为应用本发明的线路输电系统示意图。 [0009] FIG. 1 is a schematic view of the line transmission system of the present invention is applied.

具体实施方式 Detailed ways

[0010] 下面结合实施例对本发明的技术方案做进一步详细表述。 [0010] The following Example further detail in conjunction with the expression of the technical solution of the present invention.

[0011] 图1为应用本发明的线路输电系统示意图。 [0011] FIG. 1 is a schematic view of the line transmission system of the present invention is applied. 图1中CVT为电压互感器、CT为电流互感器。 FIG. 1 is a voltage transformer CVT, CT is a current transformer. 保护装置对输电线路保护安装处的电压互感器CVT的电压和电流互感器CT的电流波形进行采样得到电压、电流瞬时值,然后保护装置对其采集到的电压、电流瞬时值利用傅里叶算法计算输电线路保护安装处的故障相负序电压故障相负序电流/^、零序电压和零序电流4 ;其中,Φ为A相、B相、C相。 Current protection device and the voltage waveform of the current transformer CT installed at the protection voltage transformer CVT transmission line obtained by sampling voltage and current instantaneous value and its voltage protection device, the instantaneous current value acquired by Fourier algorithm calculation of the transmission line to protect the installation phase fault negative sequence voltage of the faulted phase negative sequence current / ^, zero sequence voltage and zero sequence current 4; wherein, [Phi] is the a phase, B phase, C phase.

[0012] 保护装置将输电线路单相接地故障点的负序电压转化为等效零序电压 [0012] The transmission line protection device single-phase ground fault point into the equivalent negative sequence voltage zero-sequence voltage

Figure CN103293440BD00041

=' = '

[0013] 保护装置根据等效零序电压 [0,013] The protection device equivalent zero-sequence voltage

Figure CN103293440BD00042

等于输电线路单相接地故障点的零序电压新-x/uZ。 Equal to the single-phase ground fault point of the transmission line a new zero sequence voltage -x / uZ. 运一故障特征即 I.e., wherein a transport failure

Figure CN103293440BD00043

直接计算输电线路保护安装处到单相接地故障点的故障距离 Direct calculation of the transmission lines to protect the installation of single-phase ground fault distance fault point

Figure CN103293440BD00044

[0014] 其中,Φ为A相、B相、C相;Z1为单位长度输电线路正序阻抗;Z0为单位长度输电线路零序阻抗;为故障相负序电压;为故障相负序电流;为零序电压;i〇为零序电流。 [0014] where, Φ is the A phase, B phase, C phase; Zl per unit length of transmission line the positive sequence impedance; Z0 of unit length transmission line zero-sequence impedance; fault phase negative sequence voltage; fault phase negative sequence current; zero sequence voltage; i〇 zero sequence current.

[0015] 本发明方法首先将输电线路单相接地故障点的负序电压转化为等效零序电压,根据输电线路单相接地故障点的零序电压与等效零序电压相等运一故障特征精确计算故障距离,实现了输电线路单相接地故障的单端测距。 [0015] The method of the present invention will first transmission line single-phase ground fault point into the equivalent negative sequence voltage zero-sequence voltage, zero-sequence voltage transmission line in accordance with single-phase ground fault point and the zero sequence voltage equivalent to a fault characteristic equalities accurate calculation of the fault distance, to achieve a single-ended single-phase ground fault distance transmission lines. 本发明方法根据输电线路沿线零序电压分布特性实现输电线路单相接地故障单端测距,原理上消除了过渡电阻对测距精度的影响,不受负荷电流和故障位置的影响,具有很高的测距精度。 The method of the present invention is to achieve a single-ended single-phase ground fault distance transmission line characteristics in accordance with zero-sequence voltage distribution along the transmission line, eliminating the influence of transition resistance on the principle of distance measurement accuracy, not affected by the load current and fault location, having high the ranging accuracy. 本发明方法测距原理简单,程序实现容易,且无需采用捜索算法直接计算故障距离,测距速度快,实时性强。 The method of the present invention ranging principle is simple, easy to implement the program, and Dissatisfied cable fault distance calculation algorithm directly, without using a fast ranging speed, and real time.

[0016] W上所述仅为本发明的较佳具体实施例,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明掲露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。 [0016] W a preferred embodiment of the present invention only, but the scope of the present invention is not limited thereto, any skilled in the art in the art within the technical scope of the present invention kei exposed, can be easily variations or alternative contemplated, shall fall within the protection scope of the present invention.

Claims (1)

1.利用序分量实现线路单相接地故障单端测距方法,其特征在于,包括下列步骤: (1) 保护装置测量输电线路保护安装处的故障相负序电压、故障相负序电流/p、零序电压広和零序电流1〇;其中,Φ为A相、B相、C相; (2) 保护装置计算输电线路保护安装处到单相接地故障点的故障距离 1. Using achieve line sequence component single-ended single-phase ground fault distance measuring method, characterized by comprising the steps of: (1) mounting at fault protection means for measuring the phase transmission line protection negative sequence voltage, negative sequence current of the faulted phase / p , Hiroshima zero sequence voltage and zero sequence current 1〇; wherein, [Phi] is the a phase, B phase, C phase; fault (2) calculates power transmission line protection device to protect the installation of the single-phase ground fault point distance
Figure CN103293440BC00021
其中,Φ为A相、B相、C相;Z1为单位长度输电线路正序阻抗;zo为单位长度输电线路零序阻抗;为故障相负序电压;为故障相负序电流;£4为零序电压;iQ为零序电流。 Wherein, Φ is the A phase, B phase, C phase; Zl per unit length of transmission line the positive sequence impedance; ZO unit length of transmission line zero-sequence impedance; fault phase negative sequence voltage; fault phase negative sequence current; £. 4 is zero sequence voltage; zero sequence current iQ.
CN 201310185058 2013-05-19 2013-05-19 Using sequence components to achieve single-line terminal GROUND FAULT LOCATION METHOD CN103293440B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201310185058 CN103293440B (en) 2013-05-19 2013-05-19 Using sequence components to achieve single-line terminal GROUND FAULT LOCATION METHOD

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201310185058 CN103293440B (en) 2013-05-19 2013-05-19 Using sequence components to achieve single-line terminal GROUND FAULT LOCATION METHOD

Publications (2)

Publication Number Publication Date
CN103293440A true CN103293440A (en) 2013-09-11
CN103293440B true CN103293440B (en) 2016-06-01

Family

ID=49094647

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201310185058 CN103293440B (en) 2013-05-19 2013-05-19 Using sequence components to achieve single-line terminal GROUND FAULT LOCATION METHOD

Country Status (1)

Country Link
CN (1) CN103293440B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103792465B (en) * 2013-12-24 2016-05-04 中国矿业大学 Based Fault Location zero sequence voltage of the single - phase method
CN105929302A (en) * 2016-04-13 2016-09-07 上海交通大学 Sequence component relation based range finding method for single-end fault of power transmission line

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1599180A (en) * 2004-07-21 2005-03-23 烟台东方电子信息产业股份有限公司 Faulty range-measuring element for power system
CN1866043A (en) * 2005-05-17 2006-11-22 Abb有限公司 System and method for determining location of phase-to-earth fault

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1599180A (en) * 2004-07-21 2005-03-23 烟台东方电子信息产业股份有限公司 Faulty range-measuring element for power system
CN1866043A (en) * 2005-05-17 2006-11-22 Abb有限公司 System and method for determining location of phase-to-earth fault

Also Published As

Publication number Publication date Type
CN103293440A (en) 2013-09-11 application

Similar Documents

Publication Publication Date Title
CN102707197A (en) Distance measuring method and type diagnostic method of single-phase grounding fault of electric transmission line
CN101325330A (en) Method for implementing earthing distance measurement element
CN101666848A (en) Fault location method based on travelling wave
CN103762560A (en) Double-circuit line non-same-name-phase overline grounded reactance distance protection method
CN101986164A (en) Method for extracting resistive current of metal oxide arrester (MOA)
CN101074979A (en) Method for measuring power-transmission circuit double-ended distance by distributing parameter
CN103576002A (en) Method for calculating dielectric loss angle of compatible insulating device
CN103869220A (en) Direct sampling and direct tripping communication mode-based double-circuit line single-phase earth fault positioning method
CN103293439A (en) Single-terminal distance measurement method for line single-phase earth faults based on distributed parameter measurement impedance amplitude characteristics
CN103219713A (en) Electric transmission line phase fault distance protecting method
Zhou et al. A new two-terminal traveling wave fault location method based on wavelet transform [J]
CN103869221A (en) SV network sampling-based double-circuit line single-phase earth fault distance measurement method
CN103235237A (en) High-voltage direct-current grounding electrode line high-resistance fault positioning method
CN102435854A (en) Improved method for measuring impulse grounding resistance of electric power system
CN105116295A (en) Direct distribution overhead line fault range finding method based on traveling wave abrupt change distance calibration
CN103094889A (en) Circuit single-phase earth fault impedance distance protection method based on additional impedance actual measurement correction
CN104242267A (en) Distance protection method for wind power generation transmission line
CN103941147A (en) Distribution network cable single-phase ground fault distance measuring method utilizing transient main frequency component
CN103823159A (en) Distribution network fault distance measuring device based on fault transient state travelling wave collection and distance measuring method
CN203232136U (en) Arc voltage measuring device of high-voltage circuit breaker
CN103353568A (en) Teed line fault branch selection method
CN103296654A (en) Line single-phase earth fault relay protection method implemented by aid of distributed parameters
CN103149503A (en) Fault location method for triangular looped network
CN103353571A (en) Method for realizing selection of T-junction circuit single-phase earth fault branch circuit by using fault factor
CN1599180A (en) Faulty range-measuring element for power system

Legal Events

Date Code Title Description
C06 Publication
C14 Grant of patent or utility model