WO2008068356A1 - On-line acoustic detector of partial discharges for accessories of medium and high voltage cables - Google Patents
On-line acoustic detector of partial discharges for accessories of medium and high voltage cables Download PDFInfo
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- 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
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- high voltage
- accessory
- medium
- acoustic
- partial discharges
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- 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
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- 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
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- 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.
Abstract
One or several capsules for sensing acoustic emission -12-, supported directly on the surface of the outer semiconductor -4- of medium and high voltage cables, in the interior of the actual accessory, splice -13- or terminal; or on the reconstruction tape of said semiconductor in the interior of splices -11-. Said capsules have the property and sensitivity for detecting, on-line, during the operation of the accessory, acoustic waves generated by partial discharges when the insulation -9- has undergone deterioration, before the same undergoes complete perforation. Also the sensory capsules -12- are intended for outside use, fitted on the outside semiconductor screen -4- of the cables, through the screen -3-, outside the splice -13- or under the base of the terminals.
Description
Detector acústico en línea, de descargas parciales para accesorios de cables de media y alta tensión In-line acoustic detector with partial discharges for medium and high voltage cable accessories
Sector de la Técnica La presente invención trata de un sistema de detección en línea de descargas parciales para los accesorios, empalmes y terminales, de cables de media y alta tensión; utilizando como principio, de detección las ondas acústicas, sonoras y ultrasonoras, generadas por las descargas.TECHNICAL FIELD 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.
Estado de la TécnicaState of the Art
La reconstitución y manipulación de los aislamientos de cables, durante el montaje de empalmes y terminales, en ocasiones tienen defectos o suciedad, causados involuntariamente, que pueden provocar el fallo del accesorio; la degradación del material debido al envejecimiento ocasionado por el tiempo en servicio, también puede finalmente desencadenar un fallo.The reconstitution and manipulation of the cable insulation, during the assembly of splices and terminals, sometimes have defects or dirt, caused involuntarily, which can cause the accessory to fail; The degradation of the material due to the aging caused by the time in service, can also finally trigger a failure.
En ambos casos, la existencia de un defecto o fallo incipiente, comienza a manifestarse mediante el efecto de la descarga parcial, que cortocircuita parcialmente el aislamiento, produciendo desplazamiento de cargas, incremento de la temperatura local y oxidación, entre otras alteraciones. Esto contribuye a agravar la magnitud del defecto, razón por la cual, su pronta detección puede permitir la reparación o sustitución del accesorio y evitar el fallo total y los consiguientes daños a la instalación y coste económico de la suspensión del servicio. Particularmente en las redes de alta tensión el tipo de fallo más frecuente, en los primeros años de servicio, es debido a defectos en los empalmes de los cables.In both cases, the existence of a defect or incipient failure, begins to manifest itself through the effect of partial discharge, which partially short-circuits the insulation, causing displacement of loads, increase in local temperature and oxidation, among other alterations. This contributes to aggravate the magnitude of the defect, which is why, its early detection can allow the repair or replacement of the accessory and avoid the total failure and the consequent damages to the installation and economic cost of the suspension of the service. Particularly in high voltage networks, the most frequent type of failure, in the first years of service, is due to defects in cable splices.
En general, los sistemas actuales de detección, se basan fundamentalmente en métodos eléctricos, patentes WO/2001/055740, WO/2006/092632, WO/1994/010579, WO/1993/017351; existen casos particulares, como los transformadores, donde se utilizan métodos eléctricos, patentes WO/2005/121821, WO/2003/019211, WO/ 1996/007925, eléctricos combinados con métodos acústicos, patentes WO/2001/018554, WO/2005/091791, WO/2002/018963, o sólo acústico para la localización de descargas, patentes WO/ 1997/024742, WO/1996/018112. Los métodos eléctricos están sometidos a alguna de las siguientes limitaciones: Los equipos no son móviles y requieren efectuar la detección en laboratorio. No pueden efectuar las
mediciones en condiciones normales de funcionamiento del accesorio, por el riesgo para las personas o equipos de tener contacto eléctrico con tensiones elevadas, obligando al descargo de la línea. Dificultades de detección, a causa de las interferencias electromagnéticas irradiadas por la instalación eléctrica en servicio. Carencia de un sistema de medición en continuo, aislado galvánicamente del accesorio bajo prueba, que permita medir con seguridad en cualquier momento y detectar la presencia o no de descargas parciales. Esta invención ofrece una alternativa a estas limitaciones.In general, current detection systems are based primarily on electrical methods, patents WO / 2001/055740, WO / 2006/092632, WO / 1994/010579, WO / 1993/017351; there are particular cases, such as transformers, where electrical methods are used, patents WO / 2005/121821, WO / 2003/019211, WO / 1996/007925, electrical combined with acoustic methods, patents WO / 2001/018554, WO / 2005 / 091791, WO / 2002/018963, or only acoustic for the location of discharges, patents WO / 1997/024742, WO / 1996/018112. Electrical methods are subject to any of the following limitations: 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.
Explicación de la invención Al tratarse de una medición que no se basa en parámetros eléctricos, el detector esta constituido por sensores de emisión acústica, no conductores eléctricos e inmunes a las interferencias electromagnéticas, colocados directamente sobre la superficie de la semiconductora exterior de los cables de media o alta tensión, en el interior de empales y terminales, o sobre la cinta semiconductora reconstruida con el aislamiento, en el interior de empalmes, cuando estos se montan.Explanation of the invention As it is a measurement that is not based on electrical parameters, 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.
Tienen la propiedad de detectar en línea, durante el funcionamiento del accesorio, las ondas acústicas, sonora y ultrasonoras, que generan las descargas parciales cuando hay actividad de degradación del aislamiento, lo que permite obtener un aviso previo antes de que este pueda sufrir la perforación completa.They have the property of detecting in line, during the operation of the accessory, the acoustic, sound and ultrasonic waves, which generate partial discharges when there is degradation activity of the insulation, which allows obtaining a prior warning before it can suffer perforation complete.
La detección se efectúa en campo, en el propio lugar de la instalación y funcionamiento del accesorio, los sensores al estar incorporados en este, pueden estar permanentemente conectados y efectuando continuamente la detección, en plenas condiciones de servicio del accesorio, sea media o alta tensión. Los sensores se colocan en los extremos del accesorio, cubriendo acústicamente su perímetro, el número necesario es función del diámetro y longitud del mismo.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.
Cada uno de los sensores, estimulado por las ondas acústicas, genera una señal de respuesta que envían al amplificador electrónico al cual están conectados, en el exterior del accesorio, donde se combinan las diferentes señales. Un convertidor electro-óptico convierte la señal resultante en luz y vía fibra óptica se envía al punto de medida, este punto, por seguridad, normalmente está alejado varios metros del accesorio sujeto a comprobación, preferiblemente fuera de la galería de la instalación; la señal también puede
ser remitida vía red telefónica o a través de internet al centro de control que disponga la compañía explotadora de la instalación.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.
La utilidad de la invención radica en la precoz detección que esta permite, contribuyendo al mantenimiento preventivo de accesorios e instalaciones, específicamente de cables, y como ya se ha expresado, es una alternativa a las limitaciones de los detectores convencionales.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.
En una realización opcional se prevé que los sensores puedan usarse externamente, colocados sobre la pantalla semiconductora exterior de los cables o por debajo de la base de terminales; esta forma de aplicación no requiere la integración de los sensores en el diseño interior del accesorio, adicionalmente permite que el montaje y uso de los mismos pueda ser discrecional, a conveniencia del usuario, pudiendo efectuarse la detección en accesorios ya instalados.In an optional embodiment, it is envisioned that 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.
Descripción de los dibujosDescription of the drawings
Para mejor compresión de la explicación realizada en el apartado anterior de esta memoria, se incluyen dibujos que representa, a título de ejemplo, un caso práctico de aplicación del detector acústico en línea de descargas parciales sobre empalmes de cables, tanto en su versión interna al accesorio, figura 1; como su variante opcional externa, figura 2. En ambos dibujos, la vista corresponde a un corte en sección axial de un empalme de alta tensión, en el cual puede verse la estructura del empalme, sus diferentes elementos y la ubicación de los sensores.For a better understanding of the explanation made in the previous section of this report, 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. In both drawings, 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.
También se incluye una representación esquemática del sistema de sujeción de la cápsula sensora, figura 3, del sistema de medida y de sus elementos, figura 4.Also included is a schematic representation of the sensor capsule clamping system, figure 3, of the measurement system and its elements, figure 4.
Descripción de un modo de realizaciónDescription of an embodiment
El detector acústico en línea de descargas parciales para accesorios de cables, consta de dos cápsulas sensoras -12- de emisión acústica, como mínimo, en cuyo interior se aloja el sensor propiamente dicho -19-, construido de material no conductor e inmune a los campos electromagnéticos, dibujo de la figura 3. Cada una está ubicada en un extremo del empalme que une dos cables de media o alta tensión- 13-.
El sensor -19- de la cápsula -12- debe colocarse en contacto con la capa semiconductora exterior, sea la del cable -4- o la reconstruida con cinta -11- durante el montaje del empalme -13-, la cara de contacto ha de tener una superficie lisa para asegurar la mejor absorción de las ondas acústicas, sonoras y ultrasonoras, que pueda emitir la zona de reconstrucción del aislamiento -5-, -8-, -9-, -10- y -11-, cuando se producen las descargas parciales, como consecuencia de algún defecto.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.
El detector está diseñado para que sus cápsulas sensoras -12- se instalen en el interior de la envolvente del empalme -13-, para tener la máxima proximidad con la zona de aislamiento reconstruido -9-. Lo cual puede requerir, en algunos casos, un rediseño de dicha envolvente -13-, si no hay espacio para contener las cápsulas -12-. Pero no implica ningún tipo de modificación que afecte la construcción en si misma del diseño de empalme -7-,-8-,-9-,-1O-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-
,-n-., -n-.
Si la envolvente del empalme -13- dispone del volumen suficiente para alojar las cápsulas sensoras -12-, estas se colocarán como se ha indicado, estableciendo contacto físico, pero no eléctrico, y se sujetarán mediante un pasador -21- que la une a otra cápsula -12- ó contra cápsula -23- en el lado contrario, dibujo de la figura 3.If 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.
Los terminales de cada sensor -19- se conectan a cables apantallados -16-, los cuales salen al exterior del empalme a través de los orificios pasa envolvente -15-, tipo prensa estopa, para evitar la entrada de humedad; los cables se conectan a la unidad amplificadora- convertidor -17- colocada sobre el cable o sobre el empalme, en función de la longitud de este, la salida -18- de esta unidad, es luz, la cual permite una conexión segura a otros equipos, ver dibujos de las figuras 1 y 2.The terminals of 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.
La unidad amplificadora -17-, dispone de una entrada y su respectivo amplificador -24- para cada sensor -19- , las señales amplificadas pasan a continuación a la etapa de tratamiento matemático -25-, en la cual se ejecuta la función requerida por el usuario (suma, diferencia, media u otra), de las diferentes señales amplificadas. La señal resultante pasa a un convertidor electro-óptico -26-, que la transforma en luz -18-, la luz es transmitida por fibra óptica -27- al lugar de medición, que puede y debe estar separado del punto de detección los metros necesarios para que la medición pueda ser efectuada con total seguridad para el operador, tanto por la separación galvánica (dieléctrica) que
aporta la fibra óptica -27-, como por la propia separación física respecto al objeto sometido a detección, diagrama de la figura 4.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.
Al otro extremo de la fibra óptica se dispone de un convertidor opto-eléctrico -28-, que convierte la luz nuevamente en señal eléctrica y la puede entregar al equipo de medida -29- , localmente o a un centro remoto de control, vía telefónica o internet, diagrama de la figura 4.At the other end of the optical fiber, 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.
En la realización opcional, se prevé que la ubicación de las cápsulas sensoras -12- esté fuera del accesorio, siendo independientes de la configuración de este. Esta variación comporta que deban realizarse un corte en la cubierta del cable -1-, -2-, a cada lado del empalme -13-, o bajo la base de los terminales, si es el caso. Estos cortes deben dejar accesible los alambres de la pantalla -3- y bajo ésta el semiconductor exterior -A-. El corte debe tener la amplitud necesaria para poder introducir la capsula sensora -12- y el sensor que esta aloja -19- debe estar en contacto con el semiconductor -4-.In the optional embodiment, it is envisioned that 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-.
Las cápsulas y el corte quedan protegidos de impactos mecánicos y de la penetración de agua por una evolvente hermética, ésta dispone de los orificios pasa envolvente -15-, tipo prensa estopa, necesarios para la salida del cable -16- y se sigue el mismo esquema de conexión de los sensores explicado en los apartados anteriores.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.
Serán independientes del objeto de la invención los materiales empleados en la fabricación de los componentes del detector acústico en línea de descargas parciales para accesorios de cables, formas, dimensiones de los mismos y todos los detalles accesorios que puedan presentarse, siempre y cuando no afecten a su esencialidad.
The materials used in the manufacture of the components of the acoustic detector in line of partial discharges for cable accessories, shapes, dimensions of the same and all the accessory details that may be presented, will be independent, provided they do not affect Its essentiality.
Claims
1. Detector acústico en línea de descargas parciales para accesorios de cables de media y alta tensión, empalmes y terminales, caracterizado por estar basado en al menos un sensor que se coloca preferentemente en el interior del accesorio y que detecta las ondas o pulsos acústicos generados por la actividad de dichas descargas, consecuencia de la presencia de fallos o degradación del aislamiento, los pulsos acústicos se detectan mediante contacto del sensor con el aislamiento, sin necesidad de conexión eléctrica con el accesorio, ni con la tensión de servicio del mismo, el sensor transforma la señal acústica de entrada en una señal de salida que envía a un equipo electrónico de tratamiento de señal, el cual a su vez transforma la señal recibida en luz, para transmitirla al equipo de medida, evitando la conexión galvánica entre sistema detector y equipo de medida.1. Acoustic detector in line of partial discharges for medium and high voltage cable accessories, splices and terminals, characterized by being based on at least one sensor that is preferably placed inside the accessory and that detects the generated acoustic waves or pulses Due to the activity of these discharges, as a result of the presence of faults or degradation of the insulation, the acoustic pulses are detected by contact of the sensor with the insulation, without the need for an electrical connection with the accessory, nor with the operating voltage thereof, the sensor transforms the input acoustic signal into an output signal that it sends to an electronic signal processing equipment, which in turn transforms the received signal into light, to transmit it to the measuring equipment, avoiding the galvanic connection between the detector system and measuring device.
2. Detector acústico en línea de descargas parciales para accesorios de cables de media y alta tensión, empalmes y terminales, según reivindicación 1, caracterizado por tener un principio de detección acústico, ondas sonoras y ultrasonoras, y no eléctrico, el cual detecta sin necesidad de conexión eléctrica con el accesorio o con la tensión de servicio del mismo, sea media o alta tensión.2. Acoustic detector in line of partial discharges for medium and high voltage cable accessories, splices and terminals, according to claim 1, characterized by having an acoustic detection principle, sound and ultrasonic waves, and non-electric, which detects without need of electrical connection with the accessory or with the service voltage of the accessory, whether medium or high voltage.
3. Detector acústico en línea de descargas parciales para accesorios de cables de media y alta tensión, empalmes y terminales, según reivindicación 1, caracterizado por operar estando en contacto físico, directo o a través de material de acoplamiento acústico, con la capa semiconductora externa de los cables, en el interior de los accesorios preferentemente o externamente próximos a ellos, pero sin establecer conexión eléctrica ya que el material del sensor es no conductor (dieléctrico) e inmune a los campos electromagnéticos.3. Acoustic detector in line of partial discharges for medium and high voltage cable accessories, splices and terminals, according to claim 1, characterized by operating in physical, direct contact or through acoustic coupling material, with the external semiconductor layer of the cables, inside the accessories preferably or externally close to them, but without establishing an electrical connection since the sensor material is non-conductive (dielectric) and immune to electromagnetic fields.
4. Detector acústico en línea de descargas parciales para accesorios de cables de media y alta tensión, empalmes y terminales, según reivindicación 1, caracterizado por su capacidad de poder estar conectado permanentemente, operar y efectuar detección en campo, en el propio lugar de instalación y en las condiciones de servicio del accesorio sujeto a ensayo o control, aportando un sistema de control en línea, como implica su propia definición. 4. Acoustic detector in line of partial discharges for medium and high voltage cable accessories, splices and terminals, according to claim 1, characterized by its ability to be permanently connected, operate and perform field detection, at the installation site itself and in the service conditions of the accessory subject to testing or control, providing an online control system, as its own definition implies.
5. Detector acústico en línea de descargas parciales para accesorios de cables de media y alta tensión, empalmes y terminales, según reivindicación 1, caracterizado por sensores que transforman, preferiblemente, las ondas acústicas en eléctricas, siendo estas tratadas por un circuito electrónico, que de forma preferente las amplifica, filtra, aplica operadores matemáticos y la señal resultante la transforma en luz y la envía al equipo de medición, asegurando la separación galvánica entre accesorio bajo prueba y equipo de medida .5. Acoustic detector in line of partial discharges for medium and high voltage cable accessories, splices and terminals, according to claim 1, characterized by sensors that preferably transform acoustic waves into electrical, these being treated by an electronic circuit, which preferably it amplifies, filters, applies mathematical operators and the resulting signal transforms it into light and sends it to the measuring equipment, ensuring the galvanic separation between the accessory under test and measuring equipment.
6. Detector acústico en línea de descargas parciales para accesorios de cables de media y alta tensión, empalmes y terminales, según reivindicación 1, caracterizado por ofrecer al operador que efectúa las mediciones, seguridad contra choques eléctricos, fuego, deflagración o impacto físico, en caso de perforación y arco eléctrico del accesorio bajo control, gracias a la separación física y galvánica del equipo de medida.6. Acoustic detector in line of partial discharges for medium and high voltage cable accessories, splices and terminals, according to claim 1, characterized in that it offers the operator who makes the measurements, safety against electric shock, fire, deflagration or physical impact, in case of drilling and electric arc of the accessory under control, thanks to the physical and galvanic separation of the measuring equipment.
7. Detector acústico en línea de descargas parciales para accesorios de cables de media y alta tensión, empalmes y terminales, según reivindicación 1, caracterizado por la independencia del objeto de la invención respecto a los materiales empleados en la fabricación de sus componentes, formas, dimensiones de los mismos y todos los detalles accesorios que puedan presentarse, siempre y cuando no afecten a su esencialidad. 7. Acoustic detector in line of partial discharges for medium and high voltage cable accessories, splices and terminals, according to claim 1, characterized by the independence of the object of the invention with respect to the materials used in the manufacture of its components, shapes, their dimensions and all the accessory details that may arise, as long as they do not affect their essentiality.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200603125A ES2301406A1 (en) | 2006-12-01 | 2006-12-01 | On-line acoustic detector of partial discharges for accessories of medium and high voltage cables |
| ESP200603125 | 2006-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008068356A1 true WO2008068356A1 (en) | 2008-06-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2007/000629 WO2008068356A1 (en) | 2006-12-01 | 2007-11-05 | On-line acoustic detector of partial discharges for accessories of medium and high voltage cables |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES2301406A1 (en) |
| WO (1) | WO2008068356A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3137760A1 (en) * | 2022-07-05 | 2024-01-12 | Office National D'etudes Et De Recherches Aérospatiales | Device for acoustic detection of an electric arc |
Citations (7)
| 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 (en) * | 1992-07-13 | 1994-02-04 | Toshiba Corp | Partial discharge detector for stationary induction apparatus |
| US5386193A (en) * | 1991-02-15 | 1995-01-31 | Fuji Electric Co., Ltd. | Partial discharge detecting device for resin-molded transformer |
| WO1996013730A1 (en) * | 1994-11-01 | 1996-05-09 | Abb Power T & D Company Inc. | Acoustic optical system for partial discharge detection and location |
| KR20020065789A (en) * | 2001-02-07 | 2002-08-14 | 주식회사 포스코 | Diagnosis system for isolation deterioration of electric apparatus |
| WO2003044516A1 (en) * | 2001-10-31 | 2003-05-30 | Sintef Energiforskning As | Device and method for acoustic detection and localization of defects |
| JP2005147890A (en) * | 2003-11-17 | 2005-06-09 | Hitachi Ltd | Insulation abnormality diagnostic device |
-
2006
- 2006-12-01 ES ES200603125A patent/ES2301406A1/en active Pending
-
2007
- 2007-11-05 WO PCT/ES2007/000629 patent/WO2008068356A1/en active Application Filing
Patent Citations (7)
| 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 (en) * | 1992-07-13 | 1994-02-04 | Toshiba Corp | Partial discharge detector for stationary induction apparatus |
| WO1996013730A1 (en) * | 1994-11-01 | 1996-05-09 | Abb Power T & D Company Inc. | Acoustic optical system for partial discharge detection and location |
| KR20020065789A (en) * | 2001-02-07 | 2002-08-14 | 주식회사 포스코 | Diagnosis system for isolation deterioration of electric apparatus |
| WO2003044516A1 (en) * | 2001-10-31 | 2003-05-30 | Sintef Energiforskning As | Device and method for acoustic detection and localization of defects |
| JP2005147890A (en) * | 2003-11-17 | 2005-06-09 | Hitachi Ltd | Insulation abnormality diagnostic device |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2301406A1 (en) | 2008-06-16 |
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