WO2009153824A1 - Capteur capacitif de champ électrique produit par un conducteur - Google Patents

Capteur capacitif de champ électrique produit par un conducteur Download PDF

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Publication number
WO2009153824A1
WO2009153824A1 PCT/IT2009/000264 IT2009000264W WO2009153824A1 WO 2009153824 A1 WO2009153824 A1 WO 2009153824A1 IT 2009000264 W IT2009000264 W IT 2009000264W WO 2009153824 A1 WO2009153824 A1 WO 2009153824A1
Authority
WO
WIPO (PCT)
Prior art keywords
capacitive sensor
sensor according
spherical dome
screened
chamber
Prior art date
Application number
PCT/IT2009/000264
Other languages
English (en)
Inventor
Alberto Bauer
Lorenzo Peretto
Roberto Tinarelli
Andrea Mollo
Original Assignee
Alberto Bauer
Lorenzo Peretto
Roberto Tinarelli
Andrea Mollo
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 Alberto Bauer, Lorenzo Peretto, Roberto Tinarelli, Andrea Mollo filed Critical Alberto Bauer
Publication of WO2009153824A1 publication Critical patent/WO2009153824A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
    • G01R15/165—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices measuring electrostatic potential, e.g. with electrostatic voltmeters or electrometers, when the design of the sensor is essential
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/12—Measuring electrostatic fields or voltage-potential

Definitions

  • the present invention relates to a capacitive sensor for sensing an electrical field generated by a live conductor, for example in order to determine the voltage of the conductor under examination with respect to the detected electrical field.
  • the present invention relates to a capacitive sensor which enables the electrical field generated by a single live conductor to be detected without being affected by any surrounding electrical fields, such as the electrical fields generated by other conductors located nearby, with particular application to the technical field of measuring instruments and equipment for low, medium and high voltage lines and/or substations.
  • Prior art -Known capacitive sensors for measuring electrical fields generated by live conductors do not enable the user to avoid the effect of surrounding electrical fields and/or to obtain sufficiently accurate measurements of the electrical field or of quantities derived therefrom.
  • the object of the present invention is to overcome the aforementioned drawbacks.
  • the invention resolves the problem of creating a capacitive sensor for sensing an electrical field generated by a live conductor, in which said capacitive sensor extends along a longitudinal axis, in which said capacitive sensor comprises a source electrode connected to the conductor, an electrical field sensor, and a signal treatment circuit, and in which said capacitive sensor is characterized in that said source electrode is made to form a first screened inner chamber, in that said electrical field sensor is placed inside said first screened inner chamber, and in that said electrical field sensor is placed close to and spaced apart from said source electrode, in order to detect the electrical field generated by said source electrode.
  • FIG. 3 shows schematically a third embodiment of the capacitive sensor proposed by the present invention.
  • the capacitive sensor of the present invention extends along a longitudinal axis Y and has a proximal end which is, for example, associated with a low, medium or high voltage conductor or bar A.
  • -Said capacitive sensor substantially comprises a first source electrode 10, an electrical field sensor 20, an electrical cable 30, a signal treatment circuit 40 and a screen element 50, these elements being embedded and positioned in and by means of a body 60 of dielectric material which forms an outer casing.
  • this is connected to the conductor A, for example by means of a spacer terminal 14, and said first source electrode 10 is shaped so as to form a first screened inner chamber 12, which essentially prevents the entry of any electrical field lines that may be generated, for example, by other conductors positioned in the vicinity of the conductor A.
  • said first chamber 12 there is housed the electrical field sensor 20, which is placed close to and spaced apart from said source electrode 10, in order to detect the field lines emitted by said first source electrode 10.
  • said source electrode 10 is shaped in the form of a first spherical dome 11 , made from conductive material, which forms within itself the first chamber 12 which is screened, while the electrical field sensor 20, in this specific embodiment, is shaped in the form of a second spherical dome 21 placed inside the chamber 12, in which said first spherical dome 11 and said second spherical dome 21 preferably, but not exclusively, have their vertices V10 and V20 aligned with respect to the axis Y of the capacitive sensor, in order to place the inner surface 13 of the first spherical dome 11 and the outer surface 22 of the second spherical dome 21 so that they are equally spaced apart, with a minimum radial distance D1 , in such a way that the dielectric strength of the dielectric body 60 is not exceeded and consequently the requisite level of insulation is provided, while the insulating properties of the dielectric medium are safeguarded and maintained over time.
  • said capacitive sensor can also comprise a second tubular screen element 50, extending along its own axis Y50 which is positioned coaxially with the axis Y of the capacitive sensor, in which said screen element 50 has a proximal end portion 51 placed inside said first chamber 12, and more specifically inside the inner chamber 23 formed by the second spherical dome 21 , and a distal portion 52 capable of forming a corresponding screened chamber 53 in which is placed the signal treatment circuit 40 together with a screened duct 54 for the purpose of putting the chamber 23 into communication with the chamber 53, in which is housed the cable 30 which connects the electrical field sensor 20 to the signal treatment circuit 40.
  • a second tubular screen element 50 extending along its own axis Y50 which is positioned coaxially with the axis Y of the capacitive sensor, in which said screen element 50 has a proximal end portion 51 placed inside said first chamber 12, and more specifically inside the inner chamber 23 formed by the second spherical dome 21 , and
  • the second spherical dome 21 and the tubular screen element 50 can be made by using various conductive materials, such as metallic and/or conductive sheet or mesh, and can also be produced by removing material from a solid body by machining.
  • this shows a variant embodiment in which the electrical field sensor, indicated here by 120, is shaped in the form of a spherical segment 121 placed inside the first screened chamber 12 formed by said first spherical dome 11.
  • said first spherical dome 11 and said spherical segment 121 have their vertices V10 and V120 aligned with respect to the axis Y of the sensor in order to ensure that the inner surface 13 of the first spherical dome 11 and the outer surface 122 of the spherical segment 121 are equally spaced from each other.
  • this shows a variant embodiment in which the electrical field sensor, indicated here by 220, is shaped in the form of a circular plate 221 placed inside the screened chamber 12 formed by said first spherical dome 11.
  • the source electrode 10 in the form of the first spherical dome 11 can be formed from suitably shaped sheets of conductive material and/or from meshes of conductive material and/or by machining from a solid and/or by other technical solutions without departure from the inventive concept of the present invention.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Capteur capacitif de champ électrique produit par un conducteur excité (A) qui comprend une électrode source reliée à lui (A), un capteur de champ électrique, et un circuit de traitement. Cette électrode (10) est conçue pour former une première chambre interne protégée par un écran (12), et ledit capteur (20) est dans cette chambre (12), mais ce capteur est aussi placé à proximité de l'électrode (10) et espacé d'elle, pour détecter le champ électrique produit par l'électrode (10).
PCT/IT2009/000264 2008-06-20 2009-06-17 Capteur capacitif de champ électrique produit par un conducteur WO2009153824A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO20080393 ITBO20080393A1 (it) 2008-06-20 2008-06-20 Sensore capacitivo per rilevare un campo elettrico generato da un conduttore
ITBO2008A000393 2008-06-20

Publications (1)

Publication Number Publication Date
WO2009153824A1 true WO2009153824A1 (fr) 2009-12-23

Family

ID=40301582

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2009/000264 WO2009153824A1 (fr) 2008-06-20 2009-06-17 Capteur capacitif de champ électrique produit par un conducteur

Country Status (2)

Country Link
IT (1) ITBO20080393A1 (fr)
WO (1) WO2009153824A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2857848A1 (fr) * 2013-10-01 2015-04-08 Sécheron SA Appareil de mesure capacitatif de tension
IT201700115489A1 (it) * 2017-10-13 2019-04-13 Green Seas Ventures Ltd Sistema costruttivo afferente un sensore capacitivo di tensione
WO2019073497A1 (fr) * 2017-10-13 2019-04-18 Alberto Bauer Système de construction concernant un capteur capacitif
US11644484B2 (en) 2018-12-17 2023-05-09 G & W Electric Company Electrical sensor assembly
US11740261B2 (en) 2016-10-14 2023-08-29 G & W Electric Company Capacitive voltage sensor assembly
US11774481B2 (en) 2018-12-17 2023-10-03 G & W Electric Company Electrical sensor assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764689C (de) * 1938-10-27 1954-05-10 Koch & Sterzel A G Hochspannungskondensator fuer Messzwecke
DE1514703A1 (de) * 1966-03-12 1969-08-28 Sachsenwerk Licht & Kraft Ag Steuerkondensator
US4328461A (en) * 1979-07-02 1982-05-04 Mcdonnell Douglas Corporation Apparatus for and method of measuring a high voltage electric field
EP0134541A1 (fr) * 1983-08-17 1985-03-20 Siemens Aktiengesellschaft Isolateur-support pour haute tension
WO1998005974A1 (fr) * 1996-07-15 1998-02-12 Asea Brown Boveri Ab Procede, dispositif et sonde pour detection de champ et de tension par effet capacitif, et leur utilisation
DE19855528A1 (de) * 1998-12-02 2000-06-21 Ritz Messwandler Kg Kapazitiver Spannungsteiler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764689C (de) * 1938-10-27 1954-05-10 Koch & Sterzel A G Hochspannungskondensator fuer Messzwecke
DE1514703A1 (de) * 1966-03-12 1969-08-28 Sachsenwerk Licht & Kraft Ag Steuerkondensator
US4328461A (en) * 1979-07-02 1982-05-04 Mcdonnell Douglas Corporation Apparatus for and method of measuring a high voltage electric field
EP0134541A1 (fr) * 1983-08-17 1985-03-20 Siemens Aktiengesellschaft Isolateur-support pour haute tension
WO1998005974A1 (fr) * 1996-07-15 1998-02-12 Asea Brown Boveri Ab Procede, dispositif et sonde pour detection de champ et de tension par effet capacitif, et leur utilisation
DE19855528A1 (de) * 1998-12-02 2000-06-21 Ritz Messwandler Kg Kapazitiver Spannungsteiler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ADOLF J SCHWAB ET AL: "Precision Capacitive Voltage Divider for Impulse Voltagge Measurements", IEEE TRANSACTIONS ON POWER APPARATUS AND SYSTEMS, IEEE INC. NEW YORK, US, vol. 82, no. 6, 1 November 1972 (1972-11-01), pages 2376 - 2382, XP011161025, ISSN: 0018-9510 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2857848A1 (fr) * 2013-10-01 2015-04-08 Sécheron SA Appareil de mesure capacitatif de tension
WO2015049604A1 (fr) * 2013-10-01 2015-04-09 Sécheron Sa Appareil de mesure du type capacitif
US11740261B2 (en) 2016-10-14 2023-08-29 G & W Electric Company Capacitive voltage sensor assembly
IT201700115489A1 (it) * 2017-10-13 2019-04-13 Green Seas Ventures Ltd Sistema costruttivo afferente un sensore capacitivo di tensione
WO2019073497A1 (fr) * 2017-10-13 2019-04-18 Alberto Bauer Système de construction concernant un capteur capacitif
US11644484B2 (en) 2018-12-17 2023-05-09 G & W Electric Company Electrical sensor assembly
US11774481B2 (en) 2018-12-17 2023-10-03 G & W Electric Company Electrical sensor assembly

Also Published As

Publication number Publication date
ITBO20080393A1 (it) 2009-12-21

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