WO2011027010A1 - Procédé de protection des être humains contre les décharges électriques - Google Patents

Procédé de protection des être humains contre les décharges électriques Download PDF

Info

Publication number
WO2011027010A1
WO2011027010A1 PCT/ES2010/000145 ES2010000145W WO2011027010A1 WO 2011027010 A1 WO2011027010 A1 WO 2011027010A1 ES 2010000145 W ES2010000145 W ES 2010000145W WO 2011027010 A1 WO2011027010 A1 WO 2011027010A1
Authority
WO
WIPO (PCT)
Prior art keywords
line
echo
irregularity
subsequent
permanent
Prior art date
Application number
PCT/ES2010/000145
Other languages
English (en)
Spanish (es)
Inventor
Juan Carlos Escobedo Molinos
Gabino Almonacid Puche
Pedro GÓMEZ VIDAL
Original Assignee
Universidad De Jaén
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 Universidad De Jaén filed Critical Universidad De Jaén
Publication of WO2011027010A1 publication Critical patent/WO2011027010A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • 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
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/40—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to ratio of voltage and current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to undesired approach to, or touching of, live parts by living beings

Definitions

  • the impedance presented by the human body to the passage of the electric current is very variable, and depends on both the contact areas and the frequency and voltage. Considering voltages higher than 50 V., a value that begins to be dangerous for the human being, and considering the worst case of low frequencies or even continuous voltage, it is necessary to detect the presence of impedances of the order of 2,500 ohms in conductive lines that can have very low characteristic impedance values. For example, for a line with an impedance of 50 ohms, the intrusion of a human body would imply an impedance variation of less than 2%, a percentage that would be reduced even more if we wanted to detect in cases of voltages below 50 volts.
  • EP-1,357,386 describes a device that detects the presence of a human body in a line investigating its existence by analyzing the variation of impedance therein by injecting variable value voltages. This measurement must be carried out with the service-free line and with a precautionary interest.
  • US-5,481,195 describes a method for detecting faults and problems in an electric line by means of pulse injection, its mathematical analysis and the comparison with pre-established patterns of the lines under analysis.
  • the system is dynamic for lines in service and dependent on the standard values of the lines that are stored for different lengths of the same.
  • Document WO-2007 / 135.162 describes a method for detecting power line failures by comparing the initial impedance along it and the impedance presented at a given time. It allows to detect derivations between two phases of the line and failures that cause a 5% variation of the impedance of the same.
  • EP-0.268.391 A1 describes a method of analyzing the echoes received on a line in response to an interrogation signal and its subsequent comparison with a set of prior or optimal references of the line under analysis.
  • the analysis of the lines can be performed dynamically, in service conditions, by analyzing in real time the incidents on it.
  • Figure 3 is a flow chart depicting the steps of a process according to a preferred embodiment of the present invention.
  • FIG. 1 schematically shows the application of the method according to the preferred embodiment of the present invention.
  • Low intensity pulses are applied by a pulse generator 1 on a line 2 in service subjected to a continuous or alternating voltage by a generator 3.
  • the echoes returned by line 2 are recorded and compared over time in a recorder and comparator 4
  • the analysis of the first and successive echoes produced allows eliminating the casuistry of possible transient signals or induced noise, and at the same time deciding whether its permanent character is indicative of the presence of an irregularity in an area of the line where Eventuality is not allowed.
  • a characteristic of the process according to the present invention is that the system used is dynamic, with the ability to adapt to evolutionary situations of the line such as the gradual variation of its characteristics, pursuing the protection of the untimely intrusion of human operators and in addition detecting the appearance of derivations of all kinds between its active phases without intervention of the earth. Additionally, the dynamic analysis of the line can be carried out in a time less than the potentially dangerous for the human being, since the interrogation of the line can be carried out at high frequency and the results can be analyzed in real time through the appropriate use of circuits and microprocessors known to those skilled in the art.
  • FIG. 2 A block diagram of a device useful for practicing a method according to a preferred embodiment of the invention is seen in Figure 2.
  • the pulse generator sends a low intensity pulse train on a line in service, which returns an echo to each of the pulses sent.
  • the voltage measuring device and the analog-to-digital converter prepare the signals for later analysis and comparison, and according to this preferred embodiment, store them in a memory. Subsequently, in the comparator the first echo returned by the line is compared with each of the subsequent echoes, allowing the casuistry of possible transient signals to be eliminated, deciding whether there is a permanent irregularity.
  • FIG. 3 shows a flow chart of a method according to a preferred embodiment of the present invention.
  • a pulse train is sent on the line and the received echoes are stored.
  • the differences between successive echoes are analyzed, thus evaluating the existence of a permanent derivation outside any impulsive signal or random noise present in the line.
  • each echo received n + 1, n + 2, n + 3, ... n + m is compared with the first echo n received from the pulse train.
  • the sequence is restarted with a new pulse train. Every time a subsequent echo is other than the first echo n, an alarm of increasing level is created.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Alarm Systems (AREA)

Abstract

La présente invention se rapport à un procédé de protection des être humains contre les décharges électriques. Ledit procédé sert à détecter la dérivation d'énergie à travers un corps humain isolé de la terre ou sans mise à la terre, et comprend les étapes consistant à appliquer un train d'impulsions de faible intensité dans une ligne en service et à comparer les échos des impulsions renvoyés dans la ligne par rapport au temps. De cette manière, la comparaison du premier écho avec les écho postérieurs permet d'éliminer les divers cas de signaux transitoires éventuels, et de déterminer s'il existe une anomalie permanente.
PCT/ES2010/000145 2009-09-02 2010-03-25 Procédé de protection des être humains contre les décharges électriques WO2011027010A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200901836 2009-09-02
ES200901836A ES2364492B1 (es) 2009-09-02 2009-09-02 Procedimiento de protección contra descargas eléctricas en seres humanos.

Publications (1)

Publication Number Publication Date
WO2011027010A1 true WO2011027010A1 (fr) 2011-03-10

Family

ID=43648917

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2010/000145 WO2011027010A1 (fr) 2009-09-02 2010-03-25 Procédé de protection des être humains contre les décharges électriques

Country Status (2)

Country Link
ES (1) ES2364492B1 (fr)
WO (1) WO2011027010A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013092066A1 (fr) * 2011-12-20 2013-06-27 Robert Bosch Gmbh Dispositif de protection, procédé et système d'alimentation en énergie

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475079A (en) * 1978-05-31 1984-10-02 Bicc Public Limited Company Apparatus for locating faults in electric cables
US4484131A (en) * 1981-09-10 1984-11-20 Patented Devices (Pty) Limited Cable testing
US5481195A (en) * 1992-06-19 1996-01-02 Siemens Aktiengesellschaft Method for finding a fault on an electrical transmission line
DE19650974A1 (de) * 1996-12-09 1998-06-18 Siemens Ag Verfahren und Anordnung zur Erfassung eines Zustandes einer elektrischen Leitung
WO2007135162A1 (fr) * 2006-05-22 2007-11-29 Fmc Tech Limited Procédé de détection de défauts sur une ligne électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475079A (en) * 1978-05-31 1984-10-02 Bicc Public Limited Company Apparatus for locating faults in electric cables
US4484131A (en) * 1981-09-10 1984-11-20 Patented Devices (Pty) Limited Cable testing
US5481195A (en) * 1992-06-19 1996-01-02 Siemens Aktiengesellschaft Method for finding a fault on an electrical transmission line
DE19650974A1 (de) * 1996-12-09 1998-06-18 Siemens Ag Verfahren und Anordnung zur Erfassung eines Zustandes einer elektrischen Leitung
WO2007135162A1 (fr) * 2006-05-22 2007-11-29 Fmc Tech Limited Procédé de détection de défauts sur une ligne électrique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013092066A1 (fr) * 2011-12-20 2013-06-27 Robert Bosch Gmbh Dispositif de protection, procédé et système d'alimentation en énergie
US9705493B2 (en) 2011-12-20 2017-07-11 Robert Bosch Gmbh Protection apparatus, method and power supply system

Also Published As

Publication number Publication date
ES2364492B1 (es) 2012-09-06
ES2364492A1 (es) 2011-09-05

Similar Documents

Publication Publication Date Title
CN105785129B (zh) 一种电动汽车绝缘检测装置
AU2022209344A1 (en) Smart sensor network for power grid health monitoring
ES2829596T3 (es) Dispositivo de protección de redes eléctricas
US9182431B2 (en) Method and apparatus for determining an insulation resistance in a grounded isole terre system
US10852332B2 (en) Isolation monitoring device and method
US9568535B2 (en) Methods for detecting an open current transformer
AU2014204920B2 (en) Measurement arrangement and method for detecting an AC voltage as a rail potential in DC railway systems and use of the measurement arrangement
US9720043B2 (en) Testing a fuse
CN106461704B (zh) 用于确定绝缘电阻的方法和设备以及具有这种设备的高压电池组系统
WO2011027010A1 (fr) Procédé de protection des être humains contre les décharges électriques
CN103884930A (zh) 一种基于绝缘监测的全桥不控整流器故障诊断方法
JP6303240B2 (ja) 検出装置、電力供給システム及び検出方法
EP2450715A1 (fr) Dispositif et procédé d'établissement d'une résistance à la terre d'un système à courant continu
DE102011084361A1 (de) Elektrische Vorrichtung zur Überwachung und Prüfung von ungeerdeten IT-Stromversorgungssystemen
RU2488129C1 (ru) Способ измерения сопротивления изоляции и защиты от замыканий на корпус силовых цепей тепловозов
Pas et al. Results of measurement and determination of threshold electric field component for transport security systems
KR100816101B1 (ko) 활선 상태에서의 누전 탐사 장치
RU124685U1 (ru) Устройство защиты трубопроводов от влияния наведенного электрического тока и грозовых атмосферных разрядов
RU2359279C2 (ru) Способ контроля состояния изоляции консоли подвески контактного провода относительно металлической арматуры железобетонной опоры контактной сети
GB2550606B (en) Apparatus for and a method of detecting leakage of current
RU2623363C1 (ru) Способ и устройство контроля исправности жил кабеля рельсовых цепей
ES2321270B2 (es) Sistema y metodo de deteccion de faltas a tierra en sistemas de corriente continua alimentados mediante rectificadores.
EP3301460A1 (fr) Dispositif de test de ligne caténaire pour un disjoncteur de circuit principal d'un système de ligne de caténaire en courant alternatif
Chang et al. Detection of the impedance variation for nuclear control cable using time frequency domain reflectometry
RU2695302C1 (ru) Способ определения места повреждения изоляции и система определения места повреждения изоляции для незаземленной системы электропитания

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10813375

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10813375

Country of ref document: EP

Kind code of ref document: A1