EP1904862A1 - Procede d'identification et de localisation des defauts a la terre dans un reseau electrique triphase - Google Patents

Procede d'identification et de localisation des defauts a la terre dans un reseau electrique triphase

Info

Publication number
EP1904862A1
EP1904862A1 EP06769357A EP06769357A EP1904862A1 EP 1904862 A1 EP1904862 A1 EP 1904862A1 EP 06769357 A EP06769357 A EP 06769357A EP 06769357 A EP06769357 A EP 06769357A EP 1904862 A1 EP1904862 A1 EP 1904862A1
Authority
EP
European Patent Office
Prior art keywords
earth fault
feeder
voltage
current
earth
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP06769357A
Other languages
German (de)
English (en)
Inventor
Andronis Linas Markevicius
Saulius Gudzius
Alfonsas Morkvenas
Linas Markevicius
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UAB "Energijos Srautas"
Original Assignee
UAB "Energijos Srautas"
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
Application filed by UAB "Energijos Srautas" filed Critical UAB "Energijos Srautas"
Publication of EP1904862A1 publication Critical patent/EP1904862A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

Definitions

  • the invention is intended for the area of electrical power network and may be applied to a method of the earth fault place location and identification in a three-phase electrical distribution network.
  • the main faults of electrical distribution networks are wire breaks and/or earth faults.
  • Fault detection methods in electrical distribution networks are described in patents SU 1762279 and SU 1698849.
  • Fault place location in patent SU 1762279 is based on useful reflection from the place of fault of signal identification and its usage for the fault location.
  • a method of phase earth fault location is described in patent SU 1698848, where the first half-wave of the discharge current is fixed in a place of short circuit, two- component amplitudes of the discharge current of a half- wave spectrum are measured and under a respective formula distance to the earth fault place is founded.
  • the invention presents a new method of earth fault location in a three-phase electrical network. It differs from the well-known methods by registration not only permanent but also short-term self-disappearing earth faults and more precise location of former or present earth faults between the phase and the earthed object in one section of a three-phase feeder substation connected to the bus section of the feeder substation. It permits the supervisory services of the electrical network to efficiently eliminate the occurred earth fault and/or to prevent possible faults, where for some reasons (the spark, touch of the tree branches, etc.) short-term earth faults occur.
  • a method is characterised by its registration of the initial processes of zero-phase sequence and voltage variations after earth fault, which are registered at the voltage transformer connected to the bus section and in the feeder current transformer of a zero- phase sequence current.
  • the better accuracy of the earth fault place location is achieved by not longer than 100 ⁇ s performance and smaller than 100 iis time intervals, decreasing by this noise influence, which frequency is lower than 10 IdHz, by special algebra separating the processes running in other feeders and loading them into a model, where the simulated process is compared with the registered one.
  • the place of earth fault and model element parameters are found by minimising goal function which is the function of the difference between the registered and simulated processes.
  • Fig. 1 presents a block-diagramme of the operational device for this method realisation
  • Fig. 2 presents a scaling filter scheme of a high frequency current process.
  • this invention uses a device schematically described in table 1, consisting of a zero-phase sequence current process identification and separation of analogue link block 1, identification of a zero-phase sequence voltage process and separation of analogue link block 2, transducers of analogue code and memory block 3, converting measured within earth fault analogue zero sequence current and voltage processes into a buffer memory, controllers block 4, co-ordinating identification of the registered process performing its analysis, modelling, parameters optimisation, fault identification and being in connection with the outer systems, interface and indication block 5 demonstrating the estimated distance to the place of earth fault
  • earth fault between a phase and the earthed object in one three-phase feeder connected to the feeder substation bus section is located by registering in an analogue method after earth fault zero-phase sequence initial current I 0 and voltage U 0 variations processes in due blocks 1 and 2 obtained from a voltage transformer connected to a bus section and from the feeder's zero-phase sequence high frequency current scaling filter 6 (Fig. 2) equipped in block 1.
  • Parameters of a high frequency current process scaling filter 6 depend on the feeder's section and configuration. Use of scaling filter 6 permits registering initial processes after earth fault of a zero-phase sequence high frequency current and locating faults more precisely.
  • the method of this invention is composed of an algorithm, the processor of which is available in controller block 4, locates earth fault in the feeders' sections in the following stages.
  • 1 [l, l,..., l] n2 ; rem and derem — algebra operations for equal clearance vectors characterised by following formulas:
  • s k _ [ ⁇ S MM((kIc--lI))+ + jJ ) / AM . a. 1 Af(A-I)+! ' M(k- ⁇ ) + 2 'M(U-V) + M (VII) a h

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Locating Faults (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention porte sur le domaine des réseaux d'énergie électrique et plus particulièrement sur un procédé d'identification permanente ou à de courte durée des défauts à la terre dans un réseau de distribution électrique triphasé et sur un procédé de détermination de la distance de l'emplacement des défauts. On parvient à une meilleure précision dans la localisation de l'emplacement des défauts à la terre en effectuant des enregistrements ne dépassant pas 100 νs et avec des intervalles de temps inférieurs à 100 ns, ce qui permet de réduire l'effet des bruits dont la fréquence est inférieure à 10 kHz. On définit la distance entre le début de la section de la ligne d'alimentation et l'emplacement des défauts à la terre en minimisant la fonction de but f2 qui est la fonction de la différence entre les procédés enregistrés et simulés :
EP06769357A 2005-07-20 2006-07-18 Procede d'identification et de localisation des defauts a la terre dans un reseau electrique triphase Withdrawn EP1904862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LT2005067A LT5337B (lt) 2005-07-20 2005-07-20 Įžemėjimo trifaziame elektros tinkle identifikavimo ir vietos nustatymo būdas
PCT/LT2006/000006 WO2007011196A1 (fr) 2005-07-20 2006-07-18 Procede d'identification et de localisation des defauts a la terre dans un reseau electrique triphase

Publications (1)

Publication Number Publication Date
EP1904862A1 true EP1904862A1 (fr) 2008-04-02

Family

ID=36778359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06769357A Withdrawn EP1904862A1 (fr) 2005-07-20 2006-07-18 Procede d'identification et de localisation des defauts a la terre dans un reseau electrique triphase

Country Status (4)

Country Link
EP (1) EP1904862A1 (fr)
LT (1) LT5337B (fr)
RU (1) RU2008105543A (fr)
WO (1) WO2007011196A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102279346A (zh) * 2011-04-14 2011-12-14 长沙理工大学 一种小电流接地系统故障选线方法
CN102590700A (zh) * 2011-12-23 2012-07-18 山东电力集团公司淄博供电公司 基于时间同步的架空线快速故障定位方法及装置
CN105759179A (zh) * 2016-04-28 2016-07-13 四川瑞霆电力科技有限公司 基于零序暂态分析小电流接地系统故障定位系统及方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101534001B (zh) * 2008-03-11 2011-11-23 杨万钟 配网短路故障检测及非故障区段恢复供电方法
CN101943737B (zh) * 2010-08-04 2012-10-24 清华大学 单相接地故障诊断方法和装置
WO2012064386A1 (fr) 2010-11-10 2012-05-18 Abb Research Ltd. Dispositifs d'interruption de pannes et procédés de commande de ces derniers
CN105866622B (zh) * 2016-03-30 2018-10-16 国网福建省电力有限公司 利用零序分量实现输电线路双端故障测距方法
US10223906B2 (en) 2017-01-23 2019-03-05 Florida Power & Light Company Open neutral detection
CN109034576B (zh) * 2018-07-13 2021-11-16 贵州电网有限责任公司 一种电力通信网故障诱因和业务影响的关联分析方法
CN111796212B (zh) * 2020-08-27 2022-08-02 广东电网有限责任公司电力调度控制中心 一种小电流接地系统单相接地故障选相方法、系统及设备

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
SE410925B (sv) * 1978-04-06 1979-11-12 Asea Ab Riktad vagdetektor
SU1698849A1 (ru) 1988-05-11 1991-12-15 Научно-исследовательский, проектно-конструкторский и технологический институт высоковольтного аппаратостроения Ленинградского производственного объединения "Электроаппарат" Способ определени мест расположени дефектов в высоковольтной изол ционной покрышке
SU1698848A1 (ru) 1990-01-08 1991-12-15 Псковский филиал Ленинградского политехнического института им.М.И.Калинина Способ определени рассто ни до места замыкани на землю в электрических сет х с изолированной нейтралью
SU1762279A1 (ru) 1991-01-21 1992-09-15 Серпуховское высшее военное командно-инженерное училище ракетных войск им.Ленинского комсомола Устройство дл определени рассто ни до места повреждени кабельных линий электропередач

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007011196A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102279346A (zh) * 2011-04-14 2011-12-14 长沙理工大学 一种小电流接地系统故障选线方法
CN102279346B (zh) * 2011-04-14 2013-04-03 长沙理工大学 一种小电流接地系统故障选线方法
CN102590700A (zh) * 2011-12-23 2012-07-18 山东电力集团公司淄博供电公司 基于时间同步的架空线快速故障定位方法及装置
CN105759179A (zh) * 2016-04-28 2016-07-13 四川瑞霆电力科技有限公司 基于零序暂态分析小电流接地系统故障定位系统及方法

Also Published As

Publication number Publication date
LT2005067A (en) 2006-02-27
WO2007011196B1 (fr) 2007-03-29
LT5337B (lt) 2006-04-25
WO2007011196A1 (fr) 2007-01-25
RU2008105543A (ru) 2009-08-27

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