WO2016066478A1 - Système et procédé pour garantir un rapport de mélange souhaité de gaz isolant d'un appareil électrique à haute tension à isolation gazeuse - Google Patents

Système et procédé pour garantir un rapport de mélange souhaité de gaz isolant d'un appareil électrique à haute tension à isolation gazeuse Download PDF

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Publication number
WO2016066478A1
WO2016066478A1 PCT/EP2015/074292 EP2015074292W WO2016066478A1 WO 2016066478 A1 WO2016066478 A1 WO 2016066478A1 EP 2015074292 W EP2015074292 W EP 2015074292W WO 2016066478 A1 WO2016066478 A1 WO 2016066478A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
insulating
insulating fluid
gas space
metering pump
Prior art date
Application number
PCT/EP2015/074292
Other languages
German (de)
English (en)
Inventor
Michael Mann
Franz-Josef Körber
Original Assignee
Abb Technology Ag
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 Abb Technology Ag filed Critical Abb Technology Ag
Publication of WO2016066478A1 publication Critical patent/WO2016066478A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/56—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • H01H33/563—Gas reservoirs comprising means for monitoring the density of the insulating gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/055—Features relating to the gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear

Definitions

  • the invention relates to a system and a method for ensuring a
  • a gas-insulated electrical high-voltage device is understood in particular as meaning a gas-insulated switchgear (GIS) operating in the high-voltage range above 50 kV or a gas-insulated transformer (GIT).
  • GIS gas-insulated switchgear
  • GIT gas-insulated transformer
  • an insulating gas is used instead of air in order to reduce the distances between the live parts and thus the required space can.
  • sulfur hexafluoride (SF 6 ) is generally used as an insulating gas today.
  • SF 6 sulfur hexafluoride
  • due to its undesirable effect as a greenhouse gas efforts are being made to replace SF 6 with alternative insulating materials. So it has recently been possible to find a much more environmentally friendly gas mixture, which similar
  • Isolation features as the previously used SF 6 .
  • an insulating gas mixture which contains a so-called insulating fluid and a carrier gas.
  • the insulating fluid provides the for the
  • the dielectric fluid is a fluoroketone or a fluoronitrile.
  • High-voltage devices especially switchgear to use, a way must be found, such as the high-voltage device at the production site or at the location of his
  • WO 2014/037031 A1 discloses a method and a system for filling a high-voltage device with insulating gas.
  • the system includes a mixer for the controlled mixing of at least two fluids, wherein the mixing ratio is determined by sensors and the mixing process is controlled based on the specific mixing ratio so that the condensation temperature of the fluids to be mixed below the temperature when filling the system.
  • the present invention is based on the finding that the gas mixture of insulating fluid and carrier gas has a property which differs substantially from SF 6 , which is important as insulating gas when using the gas mixture: after ionization as a result of an arc occurring during a switching operation, the gas mixture does not recombine back to its original state. As a result, is in ongoing operation of a GIS depending on the switching powers, a gradual consumption of the insulating fluid contained in the gas mixture can be expected.
  • the installation for filling a GIS known from WO 2014/037031 A1 the used insulating fluid can not be refilled, since, on the one hand, no filling with pure
  • Insulating fluid is provided and on the other hand, the system is designed for significantly larger quantities.
  • the system presented here contains some elements, which are also known from WO 2014/037031 A1, namely a arranged in a gas space of the high voltage device sensor for detecting the proportion of insulating fluid in the insulating gas mixture, a pump for conveying liquid insulating fluid from a reservoir , as well as a control unit for controlling the pump.
  • the system according to the invention has the following differences: the pump is a metering pump whose delivery rate is in the range of less than a standard liter or standard liters per hour ( ⁇ 1 Nl / h); no evaporator is needed; in the system, not the insulating gas mixture as such but only the evaporated insulating fluid is conveyed through the gas line and supplied to the high-voltage apparatus; and the
  • the control unit activates the dosing pump until the proportion of insulating fluid detected by the sensor is within a preset value range.
  • the low partial pressure of the insulating fluid present in the gas space causes the newly added insulating fluid evaporated without further aids.
  • the method presented here and practiced by the system according to the invention contains the following features: Detecting the proportion of insulating fluid in the
  • Insulating gas mixture in a gas space of the high voltage device Transporting the liquid insulating fluid from a reservoir in the direction of gas space by means of a metering pump with a flow rate in the range of less than a standard liters per hour, wherein the
  • Metering pump is driven until the detected proportion of insulating fluid is within a preset value range, supplying the evaporated insulating fluid to the gas space of the high voltage device.
  • High voltage device is advantageous and also simplifies the service business.
  • a gas sample is taken from the gas space of the high-voltage device, analyzed and then automatically restored the desired target gas mixture, starting from the determined, any actual output state.
  • a small-volume system is used, which realizes a small-volume cycle process which concentrates exclusively on the insulating fluid essential for the insulating properties of the gas mixture. In other words, therefore, the insulating fluid directly to the gas space of the
  • High-voltage device supplied without additional admixing of the carrier gas.
  • the controller may be configured to vary the rate of delivery of the isolation fluid in response to the magnitude of a deviation between a desired and measured levels of insulating fluid in the headspace and from an initial rate of travel by reducing the rate of advance with decreasing offset. In this way, the desired target value is comparatively slow and thus approached in the temperature equilibrium.
  • the control unit may in particular be designed to determine a required amount of insulating fluid to be replenished, depending on the initial one
  • the system additionally comprises a
  • Evaporation device with a gas mixing chamber.
  • the evaporation device is arranged between the metering pump and the gas space.
  • a gas line connects the gas mixing chamber of the evaporation device with the gas space such that a Gas exchange between the insulating gas mixture of the gas space and that of the
  • an additional heat supply device may be provided for heating the insulating fluid to be supplied to the gas space in order to avoid condensation formation and to increase the process reliability.
  • superheated steam is generated in this way, it is subsequently possible to increase the delivery speed of the metering pump and still completely evaporate the insulating fluid - even if missing
  • Fig. 1 shows a system for ensuring a desired mixing ratio in one
  • Insulating gas mixture of a gas-insulated high-voltage electrical device
  • a gas space 1 can be seen, leading to a gas-insulated electrical
  • High-voltage device in particular a gas-insulated switchgear (GIS) or a gas-insulated transformer (GIT) belongs.
  • GIS gas-insulated switchgear
  • GIT gas-insulated transformer
  • the gas space 1 In the gas space 1 are live parts 2, and the gas space 1 has been filled via a connected for the purpose of filling line B with a Isoliergasgemisch 3, which is an insulating fluid, in particular fluoroketone or fluoronitrile, and a carrier gas, in particular C0 2 , 0 second or air.
  • a Isoliergasgemisch 3 which is an insulating fluid, in particular fluoroketone or fluoronitrile, and a carrier gas, in particular C0 2 , 0 second or air.
  • the filling installation could be, for example, the installation known from WO 2014/037031 A1. After filling, it is separated from the gas space, which is why the line B is shown only by dashed lines.
  • the system comprises a sensor 4 arranged in the gas space 1 of the high-voltage device for detecting the proportion of insulating fluid in the insulating gas mixture 3, a gas line N for introducing the refill
  • Isolierfluids in the gas space 1 of the high voltage device Isolierfluids in the gas space 1 of the high voltage device, a metering pump 6 for
  • the control unit 9 can represent a unit integrated into the metering pump 6, or it acts as stand-alone device.
  • the sensor 4 is connected via a wireless or wired data connection D to the control unit 9, and the Control unit 9 transmits its control commands to the metering pump 6 via control line S.
  • the metering pump 6 in turn is connected via a gas line to the reservoir 8, for example a tank or a bottle. Your job is next to the pure one
  • the working pressure can be in a range between 1 and 10 bar.
  • the pump is a metering pump whose delivery rate is in the range of less than one standard liter per hour.
  • the delivery rate is preferably between 0.1 and 1 standard liters per hour.
  • a value of 0.1 standard liters per hour corresponds approximately to a mass flow of 100 grams per hour.
  • the sensor 4 can, for example, the partial pressure of the insulating or the
  • Isolierfluids is that must be refilled. Then the refilling process could be controlled, i. it would be the required amount measured and filled in the gas space 1, without the need for a review by means of the sensor 4. However, since the volume of the gas space is generally not known with sufficient accuracy, in the present case a regulated and thus sufficiently precise refilling is proposed, in which via the sensor 4 a feedback is made about how much insulating fluid has already been refilled. Only when a target value is reached or exceeded, the
  • the controller 9 acts as a controller.
  • the conveying speed of the insulating fluid may vary depending on the size of the insulating fluid
  • Insulating fluid can be varied in the Isoliergasgemisch 1, wherein preferably the initial conveying speed selected based on the above-described estimate of the required amount of insulating fluid and then the conveying speed is reduced with decreasing deviation of the setpoint from the actual value. In this way, the desired target value comparatively slowly and thus approached in the temperature equilibrium.
  • the system according to FIG. 1 can be permanently attached to the gas space 1. Alternatively, it can also be temporarily attached to the gas space 1 in a service case and subsequently separated again. Since it consists of only a few and especially small-volume parts, its ease of use is guaranteed by the service staff.
  • an additional evaporation device 5 may be provided which contains a gas mixing chamber.
  • the evaporation device 5 is arranged between the metering pump and the gas space, so that the gas line N connects the gas mixing chamber of the evaporation device 5 with the gas space 1.
  • a gas exchange takes place between the insulating gas mixture 3 of the gas space 1 and the insulating fluid supplied by the metering pump 6 to the gas mixing chamber.
  • the gas exchange is based on the concentration gradient between the gas mixing chamber 5 and the gas space 1.
  • a dimensioning of the gas line N a nominal width of 10 mm is proposed at a length of one meter.
  • the evaporation device 5 via an additional
  • Heat supply be heated.
  • a heat supply device without the evaporation device 5 may be provided. Meaning and purpose of the achieved
  • Heating the insulating gas supplied via the gas line N to the gas space 1 is to avoid undesired condensation. Superheated steam is thus generated by means of the heat supply device in order to increase process reliability in this way. This in turn allows to raise the conveying speed of the metering pump 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

L'invention concerne un système et un procédé destinés à garantir un rapport de mélange souhaité de gaz isolant (3) d'un appareil électrique à haute tension à isolation gazeuse, le mélange de gaz isolant (3) étant formée d'un fluide isolant et d'un gaz porteur. Pour pouvoir remplir à nouveau un appareil à haute tension qui a été rempli une fois, le système comprend un capteur (4) disposé dans un espace de gaz (1) de l'appareil à haute tension destiné à détecter la quantité de fluide isolant dans le mélange de gaz isolant (3), une pompe de dosage (6) destinée à transporter un fluide isolant liquide d'un réservoir en direction de l'espace de gaz et un dispositif de commande (9) destiné à commander la pompe de dosage jusqu'à ce que la quantité de fluide isolant détectée par le capteur se trouve dans une gamme de valeurs prédéterminée. Le débit de la pompe de dosage (6) se trouve dans la gamme de moins d'un litre standard par heure, et c'est non pas le mélange de gaz isolant en tant que tel qui est transporté dans la chambre à gaz (1) mais seulement le fluide isolant.
PCT/EP2015/074292 2014-10-29 2015-10-21 Système et procédé pour garantir un rapport de mélange souhaité de gaz isolant d'un appareil électrique à haute tension à isolation gazeuse WO2016066478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014115718.4A DE102014115718A1 (de) 2014-10-29 2014-10-29 System und Verfahren zur Sicherstellung eines Mischverhältnisses eines Isoliergasgemisches für ein gasisoliertes elektrisches Hochspannungsgerät
DE102014115718.4 2014-10-29

Publications (1)

Publication Number Publication Date
WO2016066478A1 true WO2016066478A1 (fr) 2016-05-06

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PCT/EP2015/074292 WO2016066478A1 (fr) 2014-10-29 2015-10-21 Système et procédé pour garantir un rapport de mélange souhaité de gaz isolant d'un appareil électrique à haute tension à isolation gazeuse

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DE (1) DE102014115718A1 (fr)
WO (1) WO2016066478A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445945A (zh) * 2018-06-14 2018-08-24 贵州电网有限责任公司 一种新型环保绝缘介质快速充放装置及气体配置方法
CN112133592A (zh) * 2020-11-25 2020-12-25 南京艾科赛棱特环保科技有限公司 一种快速切断式灭弧开关

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014037396A1 (fr) * 2012-09-04 2014-03-13 Abb Technology Ag Procédé de remplissage avec du fluide d'isolation et appareil de remplissage
WO2014037031A1 (fr) * 2012-09-04 2014-03-13 Abb Technology Ag Procédé de remplissage avec du fluide d'isolation et appareil de remplissage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2504033C2 (ru) * 2009-06-12 2014-01-10 Абб Текнолоджи Аг Диэлектрическая изоляционная среда
DE102010035668A1 (de) * 2010-08-27 2012-03-01 Datron Ag Minimalmengen-Kühlschmiersystem
DE102012005463A1 (de) * 2012-03-20 2013-09-26 Rwe Deutschland Ag Verfahren zur Prüfung eines gasisolierten elektrischen Hochspannungsbetriebsmittels, insbesondere zur Prüfung eines SF6- gefüllten Hochspannungs-Leistungsschalters sowie Schaltungsanordnung umfassend wenigstens ein elektrisches Hochspannungsbetriebmittel mit einer Isoliergasfüllung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014037396A1 (fr) * 2012-09-04 2014-03-13 Abb Technology Ag Procédé de remplissage avec du fluide d'isolation et appareil de remplissage
WO2014037031A1 (fr) * 2012-09-04 2014-03-13 Abb Technology Ag Procédé de remplissage avec du fluide d'isolation et appareil de remplissage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445945A (zh) * 2018-06-14 2018-08-24 贵州电网有限责任公司 一种新型环保绝缘介质快速充放装置及气体配置方法
CN112133592A (zh) * 2020-11-25 2020-12-25 南京艾科赛棱特环保科技有限公司 一种快速切断式灭弧开关

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