CN103245889A - Method utilizing lumped parameters to realize line single-phase ground fault single-terminal location - Google Patents

Method utilizing lumped parameters to realize line single-phase ground fault single-terminal location Download PDF

Info

Publication number
CN103245889A
CN103245889A CN 201310173706 CN201310173706A CN103245889A CN 103245889 A CN103245889 A CN 103245889A CN 201310173706 CN201310173706 CN 201310173706 CN 201310173706 A CN201310173706 A CN 201310173706A CN 103245889 A CN103245889 A CN 103245889A
Authority
CN
Grant status
Application
Patent type
Prior art keywords
phase
fault
single
location
transmission line
Prior art date
Application number
CN 201310173706
Other languages
Chinese (zh)
Other versions
CN103245889B (en )
Inventor
林富洪
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
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

Links

Abstract

The invention discloses a method utilizing lumped parameters to realize line single-phase ground fault single-terminal location. According to the method, the lumped parameters are adopted to describe physical properties of voltage and current transmission of a transmission line; the fault-phase negative sequence current phase angle of a relay location is adopted to calculate the voltage phase angle of a single-phase ground fault point; and the fault location is calculated according to the linear relationship between the voltage drop from the relay location of the transmission line to the single-phase ground fault point and the fault location. According to the invention, as the fault location is calculated according to the linear relationship between the voltage drop from the relay location of the transmission line to the single-phase ground fault point and the fault location, the influences of the transitional resistance and the load current to the location precision are avoided, the location precision is high, the location principle is simple and the practicability is strong. The method does not need to adopt the search algorithm, so that fault location can be directly calculated, location speed is quick and real-time performance is strong.

Description

利用集总参数实现线路单相接地故障单端测距方法 A lumped parameter line to achieve a single-ended single-phase ground fault distance measuring method

技术领域 FIELD

[0001] 本发明涉及电力系统单端故障测距技术领域,具体地说是涉及一种利用集总参数实现线路单相接地故障单端测距方法。 [0001] The present invention relates to a power system fault location Field single side, particularly relates to a lumped parameter line to achieve a single-ended single-phase ground fault distance method.

背景技术 Background technique

[0002] 根据电气量来源划分,故障测距方法主要分为双端测距方法和单端测距方法。 [0002] The amount of electrical source division method of fault location is divided into a double-ended and single-ended ranging method ranging method. 双端测距方法利用输电线路两端电气量进行故障定位,需要通过数据传输通道获取对端电气量,对数据传输通道依赖性强,实际使用中还易受双端采样值同步性的影响。 Ranging method using two-terminal transmission line at both ends of the electrical quantities fault location, it is necessary to obtain terminal information of, dependence of intensity on the data transmission channel via the data transmission channel, it is also susceptible to the actual use of the double-ended synchronization the sampling values. 单端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。 Single-ended electrical quantity ranging method using only one end of the transmission line fault location, communication and data synchronization without low equipment and operating costs stable algorithm, widely used in power transmission lines.

[0003]目前,单端故障测距方法主要分为行波法和阻抗法。 [0003] Currently, single end fault location method is divided into traveling wave method and the 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,不受系统运行方式、过度电阻等影响,但对采样率要求很高,需要专门的录波装置,应用成本高。 Bo Fali row single-ended fault location with the transmission line nature of the fault transient wave, the influence of high precision, regardless of system operation mode, excessive resistance, etc., but the sampling rate is demanding, the need for specialized recording wave device application costs 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,阻抗法测距结果会严重偏离真实故障距离,甚至出现测距失败。 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, ranging impedance results seriously deviate from the true distance to fault, even ranging failure.

发明内容 SUMMARY

[0004] 本发明的目的在于克服已有技术存在的不足,提供一种利用集总参数实现线路单相接地故障单端测距方法。 [0004] The object of the present invention is to overcome the shortcomings of the prior art, to provide a lumped circuit parameter to achieve a single-ended single-phase ground fault distance method.

[0005] 为完成上述目的,本发明采用如下技术方案:`[0006] 利用集总参数实现线路单相接地故障单端测距方法,其要点在于,包括如下依序步骤: [0005] To accomplish the above object, the present invention adopts the following technical solution: `[0006] A lumped parameter line to achieve a single-ended single-phase ground fault distance measuring method, the point is that comprising the sequential steps of:

[0007] (I)提供一种保护装置,其包括有数据采集系统和数据处理系统,保护装置的数据采集系统测量输电线路保护安装处的故障相电圧故障相负序电压故障相电流 [0007] (I) to provide a protection device which comprises a data acquisition system and a data processing system, data acquisition system protection fault measuring apparatus electrically-pressure installation fault protection Transmission Lines at the negative sequence voltage fault phase current

/故障相负序电流&2和零序电流其中,Φ=Α、Β、(:相; / Negative sequence fault phase currents and the zero sequence current & 2 wherein, Φ = Α, Β, (: phase;

[0008] (2)保护装置的数据采集系统将其测量到的输电线路保护安装处的故障相电气量传送给保护装置的数据处理系统,保护装置的数据处理系统利用输电线路保护安装处的故障相电气量计算单相接地故障点到输电线路保护安装处的故障距离X: [0008] The data acquisition system (2) protection of the faulted phase electrical quantity which measures to protect the installation of the transmission line to the data processing system of the protection device, the data processing system protection apparatus using failsafe installed at the power transmission line phase amount calculating electrical fault point to the single-phase ground fault distance X of the transmission line to protect the installation:

Ij0 sin β Iΐφ sin ^rsin ;/ Ij0 sin β Iΐφ sin ^ rsin; /

[_9] sin{fi+γ)Ζι Ϊφ + Ζ° 2lZ0I sin(y9+r)siii(flr +卢+Hz1 ίφ + Ζ° 2lZ0I [_9] sin {fi + γ) Ζι Ϊφ + Ζ ° 2lZ0I sin (y9 + r) siii (flr + Lu + Hz1 ίφ + Ζ ° 2lZ0I

V zI J V zI J V zI J V zI J

i_jj ( ϋ Λ i_jj (ϋ Λ

[0010]其中,Φ = A、B、C 相;a = Arg ; β = Arg ; [0010] where, Φ = A, B, C phase; a = Arg; β = Arg;

IJ U ¢2 ) IJ U ¢ 2)

Figure CN103245889AD00041

; 为故障相电压; 为故障相负序电压;为故障相电 ; Fault phase voltage; negative sequence voltage of the faulted phase; electrically fault

流;为故障相负序电流;Α)为零序电流;Zl、Ztl分别为单位长度输电线路正序阻抗、零序阻抗。 Stream; fault phase negative sequence current; [alpha]) is the zero sequence current; Zl, Ztl unit length of transmission line respectively, the positive sequence impedance, zero sequence impedance.

[0011] 本发明与现有技术相比较,具有以下积极成果: [0011] The present invention compared with the prior art, has a positive outcome:

[0012] 本发明方法根据输电线路保护安装处到单相接地故障点的电压降与故障距离呈线性关系计算故障距离,克服了过渡电阻和负荷电流对故障测距精度的影响,测距精度高,测距原理简单,实用性强。 [0012] The method of the present invention, the linear relationship between calculated distance to fault, fault resistance and to overcome the influence of the load current fault location accuracy, high power transmission line protection according to the installation distance to the voltage drop as a single-phase ground fault the fault point distance measurement accuracy , ranging principle is simple and practical. 本发明方法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 directly calculate the fault distance search algorithm, ranging fast speed, real-time without using. 附图说明 BRIEF DESCRIPTION

[0013] 图1为应用本发明的线路输电系统示意图。 [0013] 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

[0014] 下面根据说明书附图对本发明的技术方案做进一步详细表述。 [0014] The following further detailed statement of the technical solution according to the invention the accompanying drawings.

[0015] 图1为应用本发明的线路输电系统示意图。 [0015] FIG. 1 is a schematic view of the line transmission system of the present invention is applied. 图1中PT为电压互感器、CT为电流互感器。 FIG. 1 is a voltage transformer PT, CT is a current transformer. 保护装置的数据采集系统对输电线路保护安装处的电压互感器PT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,并通过傅里叶算法计算输电线路保 Data acquisition system for protection of voltage and current waveforms of the voltage of the current transformer CT installed at the transformer PT protection transmission lines obtained by sampling voltage and current instantaneous value, and calculates the transmission line retention by a Fourier algorithm

护安装处的故障相电圧故障相负序电压f/02故障相电流^、故障相负序电流和零序电流4,作为输入量;其中,Φ=Α相、B相、C相。 Fault-pressure-phase fault protection installation phase negative sequence voltage at f / 02 ^ fault phase current, the phase fault negative sequence current and zero sequence current 4, as input; wherein, Φ = Α phase, B phase, C phase.

[0016] 保护装置的数据采集系统将输电线路保护安装处的故障相电压故障相负序 [0016] Data acquisition system fault protection device to protect the installation phase voltage at the fault Transmission Lines negative sequence

电圧%、故障相电流故障相负序电流&2和零序电流&传送给保护装置的数据处理系统,保护装置的数据处理系统依序进行如下运算: %-Pressure electrical fault phase the phase current fault negative sequence current and zero sequence current & 2 & protection system to the data processing apparatus, the data processing system apparatus protection operation sequentially as follows:

[0017] (I)计算领先f的角度a [0017] (I) calculating a leading angle f

Figure CN103245889AD00042

[0018] (2)计算.领先的角度 [0018] (2) calculation of the angle of the leading

Figure CN103245889AD00043

[0019] (3)计算单位长度输电线路电压降 [0019] (3) The unit length of the transmission line voltage drop

Figure CN103245889AD00044

领先故障相电压"的角度 Leading phase voltage fault "point of view

Figure CN103245889AD00045

;其中,Zl、Ztl分别为单位长度输电线路正序阻抗、零序阻抗。 ; Wherein, Zl, Ztl were positive sequence impedance per unit length of the transmission line, zero-sequence impedance. [0020] (4)计算单相接地故障点到输电线路保护安装处的故障距离X: [0020] (4) GROUND FAULT calculated fault point at a distance X to protect the installation of transmission lines:

[0021 ] [0021]

Figure CN103245889AD00051

[0022] 本发明方法采用集总参数描述输电线路电压、电流传输的物理特性,采用保护安装处的故障相负序电流相角计算单相接地故障点电压相角,利用输电线路保护安装处到单相接地故障点的电压降与故障距离呈线性关系计算故障距离。 [0022] The method of the present invention employs lumped parameters describe transmission line voltage, the physical characteristics of the current transmission, the use of protective installed at the fault phase negative sequence current phase angle calculation single-phase ground fault point voltage phase angle, with the protective mounting the transmission line to single-phase ground fault point voltage drop across the fault distance is linear fault distance calculation.

[0023] 本发明方法根据输电线路保护安装处到单相接地故障点的电压降与故障距离呈线性关系计算故障距离,克服了过渡电阻和负荷电流对测距精度的影响,测距精度高,测距原理简单,实用性强。 [0023] The method of the present invention to the single-phase ground fault point voltage drop across the fault distance is calculated linear distance to fault, fault resistance and to overcome the influence of the load current of ranging accuracy, high precision ranging at the transmission line protection according to the installation, ranging principle is simple and practical. 本发明方法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 directly calculate the fault distance search algorithm, ranging fast speed, real-time without using.

[0024] 以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揭露的技术范围内,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。 [0024] The foregoing is only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, any skilled in the art in the art within the scope of the invention disclosed can be easily thought of changes or replacements shall fall within the protection scope of the present invention.

Claims (1)

  1. 1.利用集总参数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: (1)提供一种保护装置,其包括有数据采集系统和数据处理系统,保护装置的数据采集系统测量输电线路保护安装处的故障相电圧故障相负序电压、故障相电流故障相负序电流h和零序电流/();其中,Φ=Α、Β、(:相; (2)保护装置的数据采集系统将其测量到的输电线路保护安装处的故障相电气量传送给保护装置的数据处理系统,保护装置的数据处理系统利用输电线路保护安装处的故障相电气量计算单相接地故障点到输电线路保护安装处的故障距离X: 1. A lumped parameter line to achieve a single-ended single-phase ground fault distance measuring method, characterized by comprising the sequential steps of: (1) providing a protection device comprising a data collection system and a data processing system, the protection device data acquisition system for measuring fault protection installed at the transmission line is electrically-pressure fault phase negative sequence voltage, the faulted phase current fault phase negative sequence current h and the residual current / (); where, Φ = Α, Β, (: phase; data acquisition system (2) protection of the faulted phase electrical quantity which measures to protect the installation of the transmission line to the data processing system of the protection device, the data processing system of the protection device using the faulted phase electricity protection mounted at the power transmission line single-phase ground fault calculations the fault distance X of the transmission line to protect the installation:
    Figure CN103245889AC00021
    其中,Φ=Α、Β、c:相; Wherein, Φ = Α, Β, c: phase;
    Figure CN103245889AC00022
    力故障相电压;C/p力故障相负序电压力故障相电流;^2为故障相负序电流Iu为零序电流;Zl、Z0分别为单位长度输电线路正序阻抗、零序阻抗。 Force fault phase voltages; C / p force faulty phase negative sequence fault phase current pressure; ^ 2 is the negative sequence fault currents Iu zero-phase sequence current; Zl, Z0 unit length of transmission line respectively, the positive sequence impedance, zero sequence impedance.
CN 201310173706 2013-05-10 2013-05-10 A lumped parameter line to achieve a single-ended single-phase ground fault distance measuring method CN103245889B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201310173706 CN103245889B (en) 2013-05-10 2013-05-10 A lumped parameter line to achieve a single-ended single-phase ground fault distance measuring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201310173706 CN103245889B (en) 2013-05-10 2013-05-10 A lumped parameter line to achieve a single-ended single-phase ground fault distance measuring method

Publications (2)

Publication Number Publication Date
CN103245889A true true CN103245889A (en) 2013-08-14
CN103245889B CN103245889B (en) 2016-08-10

Family

ID=48925532

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201310173706 CN103245889B (en) 2013-05-10 2013-05-10 A lumped parameter line to achieve a single-ended single-phase ground fault distance measuring method

Country Status (1)

Country Link
CN (1) CN103245889B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724597A2 (en) * 2005-05-17 2006-11-22 ABB Oy System and method for determining location of phase-to-earth fault
WO2011032585A1 (en) * 2009-09-16 2011-03-24 EMAC (Electromechanical Applications Consulting) Limited Apparatus for protecting a medium voltage distribution transformer and the distribution line upstream of the transformer
CN102175952A (en) * 2011-01-28 2011-09-07 华北电力大学 Circuit single-phase ground distance measurement method
CN102707197A (en) * 2012-06-11 2012-10-03 福建省电力有限公司检修分公司 Distance measuring method and type diagnostic method of single-phase grounding fault of electric transmission line

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724597A2 (en) * 2005-05-17 2006-11-22 ABB Oy System and method for determining location of phase-to-earth fault
WO2011032585A1 (en) * 2009-09-16 2011-03-24 EMAC (Electromechanical Applications Consulting) Limited Apparatus for protecting a medium voltage distribution transformer and the distribution line upstream of the transformer
CN102175952A (en) * 2011-01-28 2011-09-07 华北电力大学 Circuit single-phase ground distance measurement method
CN102707197A (en) * 2012-06-11 2012-10-03 福建省电力有限公司检修分公司 Distance measuring method and type diagnostic method of single-phase grounding fault of electric transmission line

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
林富洪 等: "基于分布参数模型的高压输电线路单相接地故障单端测距方法", 《电网技术》, vol. 35, no. 4, 30 April 2011 (2011-04-30), pages 201 - 205 *

Also Published As

Publication number Publication date Type
CN103245889B (en) 2016-08-10 grant

Similar Documents

Publication Publication Date Title
CN102175952A (en) Circuit single-phase ground distance measurement method
CN102709891A (en) Distributed parameter measurement impedance-based relay protection method for single-phase grounding fault of power transmission line
CN101776725A (en) Fault positioning method for transmission line
CN102200563A (en) Line single-phase earth fault single-terminal location method based on positioning function amplitude characteristics
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
CN101419254A (en) Uhv transmission line parameter measuring systems and method
CN103424669A (en) Route selection method for analyzing first principal component by utilizing principal component of zero-sequence current matrix of faulty feeder line
CN103529321A (en) Current transformer saturation detecting method
CN102135589A (en) Distance measurement method for line phase-to-phase fault distance protection
CN101232177A (en) HVDC transmission line distance protecting method
CN102175954A (en) Circuit inter-phase fault single-end ranging method
CN101173975A (en) Method for implementing distance measurement between two ends of electric transmission line using interphase electrical quantities
CN1858954A (en) Method for realizing line differential protection based on long line equation
CN101325329A (en) Method for implementing earthing distance measurement element based on negative sequence fault current component
CN103762560A (en) Double-circuit line non-same-name-phase overline grounded reactance distance protection method
CN101074979A (en) Method for measuring power-transmission circuit double-ended distance by distributing parameter
CN203149027U (en) Voltage fluctuation and flicker detection apparatus based on energy operator and frequency spectrum correction
CN103116107A (en) High voltage direct current power source insulation monitoring device
CN102288874A (en) The latter test simulation method for fault identification and external high voltage AC transmission line model Laid concentration region based on the parameter t
CN102866327A (en) Small-current grounding system fault transient traveling wave detection device and method
CN102435858A (en) Method and system for online measurement of short-circuit loss and open-circuit loss of transformer
CN101986164A (en) Method for extracting resistive current of metal oxide arrester (MOA)
CN103293442A (en) Line single-phase earth fault single-terminal location method implemented by aid of zero-sequence voltage distribution characteristics
CN102769279A (en) High-resistance grounding phase selection method for longitudinal zero-sequence protection of line protection device

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
C14 Grant of patent or utility model