WO2008068356A1 - Détecteur acoustique en ligne de décharges partielles, pour accessoires de câbles de moyenne et haute tension - Google Patents

Détecteur acoustique en ligne de décharges partielles, pour accessoires de câbles de moyenne et haute tension Download PDF

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Publication number
WO2008068356A1
WO2008068356A1 PCT/ES2007/000629 ES2007000629W WO2008068356A1 WO 2008068356 A1 WO2008068356 A1 WO 2008068356A1 ES 2007000629 W ES2007000629 W ES 2007000629W WO 2008068356 A1 WO2008068356 A1 WO 2008068356A1
Authority
WO
WIPO (PCT)
Prior art keywords
high voltage
accessory
medium
acoustic
partial discharges
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.)
Ceased
Application number
PCT/ES2007/000629
Other languages
English (en)
Spanish (es)
Inventor
Pablo Casals Torrents
Ricard Bosch Tous
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.)
Universitat Politecnica de Catalunya UPC
Original Assignee
Universitat Politecnica de Catalunya UPC
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 Universitat Politecnica de Catalunya UPC filed Critical Universitat Politecnica de Catalunya UPC
Publication of WO2008068356A1 publication Critical patent/WO2008068356A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/50—Means for detecting the presence of an arc or discharge

Definitions

  • the present invention relates to an in-line detection system for partial discharges for accessories, splices and terminals, for medium and high voltage cables; using as a principle, the sound, sound and ultrasonic waves generated by the discharges.
  • the equipment is not mobile and requires laboratory detection. They cannot do the measurements under normal operating conditions of the accessory, due to the risk to persons or equipment of having electrical contact with high voltages, forcing the discharge of the line. Difficulties of detection, due to electromagnetic interference radiated by the electrical installation in service. Lack of a continuous measurement system, galvanically isolated from the accessory under test, which allows to measure safely at any time and detect the presence or absence of partial discharges. This invention offers an alternative to these limitations.
  • the detector consists of acoustic emission sensors, not electrical conductors and immune to electromagnetic interference, placed directly on the surface of the outer semiconductor of the cables. medium or high voltage, inside of joints and terminals, or on the reconstructed semiconductor tape with the insulation, inside of joints, when they are mounted.
  • the detection is carried out in the field, in the place of installation and operation of the accessory, the sensors being incorporated in it, can be permanently connected and continuously performing the detection, in full service conditions of the accessory, whether medium or high voltage .
  • the sensors are placed at the ends of the accessory, acoustically covering its perimeter, the necessary number is a function of its diameter and length.
  • Each of the sensors stimulated by the acoustic waves, generates a response signal that they send to the electronic amplifier to which they are connected, outside the accessory, where the different signals are combined.
  • An electro-optical converter converts the resulting signal into light and via optical fiber it is sent to the measurement point, this point, for safety, is normally several meters away from the accessory under test, preferably outside the installation gallery; the signal can also be sent via telephone network or through the internet to the control center available to the operating company of the facility.
  • the utility of the invention lies in the early detection it allows, contributing to the preventive maintenance of accessories and installations, specifically of cables, and as already stated, is an alternative to the limitations of conventional detectors.
  • the sensors can be used externally, placed on the outer semiconductor screen of the cables or below the terminal base; This form of application does not require the integration of the sensors in the interior design of the accessory, additionally it allows that the assembly and use of them can be discretionary, at the user's convenience, and detection can be carried out on already installed accessories.
  • drawings are included that represent, as an example, a practical case of applying the acoustic detector in line of partial discharges on cable splices, both internally and accessory, figure 1; as its optional external variant, figure 2.
  • the view corresponds to an axial section cut of a high voltage joint, in which the structure of the joint, its different elements and the location of the sensors can be seen.
  • the acoustic detector in line of partial discharges for cable accessories consists of two sensor capsules -12- of at least acoustic emission, inside which the sensor itself -19- is housed, constructed of non-conductive material and immune to the electromagnetic fields, drawing of figure 3. Each one is located at one end of the junction that joins two medium or high voltage cables- 13-.
  • the sensor -19- of the capsule -12- must be placed in contact with the outer semiconductor layer, be that of the cable -4- or the reconstructed one with tape -11- during the assembly of the joint -13-, the contact face has of having a smooth surface to ensure the best absorption of acoustic, sound and ultrasonic waves, which may emit the reconstruction zone of the insulation -5-, -8-, -9-, -10- and -11-, when produce partial discharges, as a result of some defect.
  • the detector is designed so that its sensor capsules -12- are installed inside the enclosure of the junction -13-, to have maximum proximity to the reconstructed isolation zone -9-. Which may require, in some cases, a redesign of said envelope -13-, if there is no space to contain the capsules -12-. But it does not imply any modification that affects the construction itself of the splice design -7 -, - 8 -, - 9 -, - 1O-
  • the splice envelope -13- has sufficient volume to accommodate the sensor capsules -12-, these will be placed as indicated, establishing physical contact, but not electrical, and will be held by a pin -21- that joins it to another capsule -12- or against capsule -23- on the opposite side, drawing of figure 3.
  • each sensor -19- are connected to shielded cables -16-, which exit to the outside of the junction through the holes passes through -15-, tow press type, to prevent the entry of moisture; the cables are connected to the amplifier-converter unit -17- placed on the cable or on the junction, depending on the length of this, the output -18- of this unit, is light, which allows a secure connection to others teams, see drawings of figures 1 and 2.
  • the amplifier unit -17- has an input and its respective amplifier -24- for each sensor -19-, the amplified signals then pass to the mathematical treatment stage -25-, in which the function required by the user (sum, difference, average or other) of the different amplified signals.
  • the resulting signal passes to an electro-optical converter -26-, which transforms it into light -18-, the light is transmitted by fiber optic -27- to the measurement site, which can and should be separated from the detection point meters necessary for the measurement to be carried out with total safety for the operator, both by the galvanic (dielectric) separation that provides the optical fiber -27-, as per the physical separation itself with respect to the object under detection, diagram of Figure 4.
  • an opto-electric converter -28- is available, which converts the light back into an electrical signal and can be delivered to the measuring equipment -29-, locally or to a remote control center, via telephone or internet diagram in figure 4.
  • the location of the sensor capsules -12- is outside the accessory, being independent of its configuration.
  • This variation means that a cut must be made on the cable cover -1-, -2-, on each side of the junction -13-, or under the base of the terminals, if applicable. These cuts must make the display wires -3- accessible and under this the outer semiconductor -A-. The cut must have the necessary amplitude to be able to introduce the sensor capsule -12- and the sensor it houses -19- must be in contact with the semiconductor -4-.
  • the capsules and the cut are protected from mechanical impacts and the penetration of water by an airtight evolving one, this one has the holes passing envelope -15-, type press tow, necessary for the exit of the cable -16- and follows the same connection scheme of the sensors explained in the previous sections.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

L'invention concerne un détecteur acoustique composé d'une ou de plusieurs cellules sensibles aux émissions acoustiques (12) reposant directement sur la surface de l'élément semi-conducteur extérieur (4) des câbles de moyenne et haute tension, à l'intérieur de l'accessoire, de l'assemblage (13) ou du terminal; ou sur la bande de reconstruction dudit élément semi-conducteur à l'intérieur d'assemblages (11). Ce détecteur se caractérise par le fait qu'il permet de détecter, en ligne, durant le fonctionnement de l'accessoire, les ondes acoustiques qui génèrent les décharges partielles lors d'une dégradation de l'isolation (9), avant que l'accessoire ne soit totalement perforé. Les cellules de détection (12) peuvent également être utilisées à l'extérieur, sur l'écran semi-conducteur extérieur (4) des câbles, à travers l'écran (3) situé en-dehors de l'assemblage (13) ou sous la base des terminaux.
PCT/ES2007/000629 2006-12-01 2007-11-05 Détecteur acoustique en ligne de décharges partielles, pour accessoires de câbles de moyenne et haute tension Ceased WO2008068356A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200603125 2006-12-01
ES200603125A ES2301406A1 (es) 2006-12-01 2006-12-01 Detector acustico en linea, de descargas parciales para accesorios de bales de media y alta tension.

Publications (1)

Publication Number Publication Date
WO2008068356A1 true WO2008068356A1 (fr) 2008-06-12

Family

ID=39469723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2007/000629 Ceased WO2008068356A1 (fr) 2006-12-01 2007-11-05 Détecteur acoustique en ligne de décharges partielles, pour accessoires de câbles de moyenne et haute tension

Country Status (2)

Country Link
ES (1) ES2301406A1 (fr)
WO (1) WO2008068356A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3137760B1 (fr) * 2022-07-05 2024-06-14 Office National Detudes Rech Aerospatiales Dispositif de détection acoustique d’un arc électrique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245187A (en) * 1979-05-10 1981-01-13 The United States Of America As Represented By The Secretary Of The Navy VLF Capacitor corona detection
JPH0627183A (ja) * 1992-07-13 1994-02-04 Toshiba Corp 静止誘導機器の部分放電検出装置
US5386193A (en) * 1991-02-15 1995-01-31 Fuji Electric Co., Ltd. Partial discharge detecting device for resin-molded transformer
WO1996013730A1 (fr) * 1994-11-01 1996-05-09 Abb Power T & D Company Inc. Systeme acoustico-optique pour detection et localisation d'une decharge partielle
KR20020065789A (ko) * 2001-02-07 2002-08-14 주식회사 포스코 전기기기의 절연열화 진단시스템
WO2003044516A1 (fr) * 2001-10-31 2003-05-30 Sintef Energiforskning As Dispositif et procede pour la detection et la localisation acoustiques de defauts
JP2005147890A (ja) * 2003-11-17 2005-06-09 Hitachi Ltd 絶縁異常診断装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245187A (en) * 1979-05-10 1981-01-13 The United States Of America As Represented By The Secretary Of The Navy VLF Capacitor corona detection
US5386193A (en) * 1991-02-15 1995-01-31 Fuji Electric Co., Ltd. Partial discharge detecting device for resin-molded transformer
JPH0627183A (ja) * 1992-07-13 1994-02-04 Toshiba Corp 静止誘導機器の部分放電検出装置
WO1996013730A1 (fr) * 1994-11-01 1996-05-09 Abb Power T & D Company Inc. Systeme acoustico-optique pour detection et localisation d'une decharge partielle
KR20020065789A (ko) * 2001-02-07 2002-08-14 주식회사 포스코 전기기기의 절연열화 진단시스템
WO2003044516A1 (fr) * 2001-10-31 2003-05-30 Sintef Energiforskning As Dispositif et procede pour la detection et la localisation acoustiques de defauts
JP2005147890A (ja) * 2003-11-17 2005-06-09 Hitachi Ltd 絶縁異常診断装置

Also Published As

Publication number Publication date
ES2301406A1 (es) 2008-06-16

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