EP2110822A1 - Method for reducing the air supply from the atmosphere into the expansion tank of high voltage facilities filled with isolating fluid and device for carrying out the method - Google Patents
Method for reducing the air supply from the atmosphere into the expansion tank of high voltage facilities filled with isolating fluid and device for carrying out the method Download PDFInfo
- Publication number
- EP2110822A1 EP2110822A1 EP08103545A EP08103545A EP2110822A1 EP 2110822 A1 EP2110822 A1 EP 2110822A1 EP 08103545 A EP08103545 A EP 08103545A EP 08103545 A EP08103545 A EP 08103545A EP 2110822 A1 EP2110822 A1 EP 2110822A1
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- Prior art keywords
- tank
- buffer space
- atmosphere
- expansion vessel
- air
- Prior art date
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Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 title claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 38
- 239000001301 oxygen Substances 0.000 claims abstract description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 28
- 239000011261 inert gas Substances 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 17
- 238000009413 insulation Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 238000003878 thermal aging Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/4456—With liquid valves or liquid trap seals
- Y10T137/4643—Liquid valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/4456—With liquid valves or liquid trap seals
- Y10T137/4643—Liquid valves
- Y10T137/4658—With auxiliary means for varying liquid level
Definitions
- the invention relates to a method for reducing the supply of air from the atmosphere in the expansion vessel filled with insulating high-voltage systems.
- the invention also relates to a device for carrying out the method, the design of which differs when new starting up of transformers from the already used in transformers thermal aging.
- High-voltage systems eg transformers
- insulating liquids eg mineral oil
- the latter are taken up by expansion vessels above the transformer tank.
- the pressure equalization to the atmosphere via a pipe, which is closed at its end with a dehumidifier and an oil bell.
- an air supply from the atmosphere occurs when with the onset of thermal aging of oxygen in the active part of the transformer is consumed as well as degassed insulating fluids during re-saturation (re-commissioning, repairs).
- DE 10035947 B4 discloses an apparatus for reducing the contamination of liquids by air mixture and water.
- This device consists of the main container in which there is the heat source, which is connected in its lower part with a tube with the Dilatations electer; which flows freely into the surrounding atmosphere. Between the pure and warm liquid, a stable layer of thermal stagnation forms, which is spontaneous under the heat source at the boundary layer to the underlying cold potentially Contaminated liquid, which is located in the lower part of the main container, the connecting tube and Dilatations capableer arises.
- the aim of one's invention is to make the expansion vessel, in particular with direct air contact, in order to obtain a sustainable reduction of the oxygen content and to reduce the moisture input from the atmosphere.
- the object of the invention is to provide a connected to the expansion vessel of the high voltage system, non-lockable air buffer space, which restricts the use of air caused by the gas budget of the Isolier crampkeitssystems air entry from the atmosphere and utilize that with the onset of thermal aging of the insulation system simultaneously in the liquid Dissolved oxygen is consumed, so as to get a reduction in the oxygen content of the air in the expansion vessel and thus reduce the oxygen consumption by continuous feedback and to reduce the moisture input.
- the object is solved by the features illustrated in the claims.
- the basic idea is to use an external breathing buffer selectable in combination with the use of an inert gas.
- an inert gas is fed into the buffer space for faster and greater reduction of the air supply from the atmosphere when the pressure falls below the atmospheric pressure.
- the stability of the gas balance can be improved by setting an upper and lower limit in the buffer space for the absolute pressure, outside of which a pressure equalization with the atmosphere takes place.
- the method can be used both in expansion vessels with direct contact between insulating liquid and gas space as well as in expansion vessels with separating membrane.
- the device according to the invention consists of an outer closed, cylindrical tank, in whose lid a second smaller, cylindrical inner tank is inserted with a lid. This is open at the bottom and spaced from the bottom of the outer tank. In the lower casing area, a pipe opening leads into the upper area of the compensation space of the inner tank.
- the outer tank is connected via a connection with the dehumidifier of the expansion tank. From the compensation chamber of the inner tank, a horizontal pipe, which ends as a downwardly open pipe bend, leads out through the outer tank shell.
- an insulating liquid is contained with exactly sized filling volume, so that form a buffer space in the outer tank and a compensation space in the inner tank.
- a one-way cock is preferably arranged in the upper region of the jacket.
- a float switch may also be arranged, which is connected via a valve to a pressure vessel of an inert gas.
- a manifold with the dehumidifier of the expansion vessel.
- this can be connected to a volume-variable buffer bag.
- a pressure sensor in conjunction with a freely opening to the atmosphere valve.
- the outer and inner tanks may be cubic or cuboid.
- the inner tank has a bottom and is arranged next to the outer tank in the manner that a wall is shared, in the lower region of a pipe joint is arranged at a predetermined height.
- the entire device is not lockable.
- Fig. 1 shows a schematic representation of the device according to the invention on the expansion vessel of a transformer, which is not connected shut-off.
- the device consists of an outer closed, cylindrical tank 1, in whose lid 2 a second, smaller cylindrical tank 3 is inserted centrally.
- the tanks 1 and 3 may also be cubic or cuboid.
- the inner tank 3 has no bottom, is spaced from the bottom of the outer tank 1 and has in the lower part of the shell a pipe opening 4, which leads via a pipe 5 in the upper part of the tank 3.
- the inner tank 3 has its own lid 6.
- the jacket of tank 1 has below the upper edge of a nozzle 7, and a one-way valve 11.
- a float switch 12 is disposed in the lower region, which is connected via a valve 13 with a pressure vessel of an inert gas.
- a compensating tube 8 In the upper part of the shell of the inner tank 3 is inserted a compensating tube 8 and leads horizontally through the shell of the outer tank 1 to the outside and is open at the bottom.
- tank 3 The lid 6 of tank 3 is removed and tanks 1 and 3 are partially filled with a precisely determined volume of an insulating liquid 14, eg transformer oil, which may be without quality requirements.
- an insulating liquid 14 eg transformer oil, which may be without quality requirements.
- This creates a buffer space 15 in the outer tank 1 above the insulating liquid 14, which is connected via the dehumidifier 9 with the air space of the expansion vessel 10 and forms a unit with this.
- the insulating liquid 14 has the task of a diffusion barrier for oxygen between the air in the expansion vessel 10 and the atmosphere.
- the tube opening 4 in tube 5 serves to take over the free gas exchange between the buffer space 15 and the atmosphere in order not to move the insulating liquid 14 as a diffusion barrier.
- floating body 17 can be introduced to cover the Isolier crampkeitsober Structure in the tank 3 and tube 5.
- To reinforce the diffusion barrier pipe 5 may also be a U-tube 20, which has openings 21 below and also passes through tank 1, in which case floats 17 are introduced ( Fig. 2 ). These floats 17 are filled, for example via two covers 22 in the lid 2 in the tank 1.
- a nozzle with closure 25 is attached to the connection of a buffer bag.
- both tanks 1 and 3 and the filling volume of the insulating liquid 14 are derived from the selected operating temperatures, the predetermined pressures and the Isolierteilkeitseigenschaften.
- the outer tank 1 is preferably protected from the outside against solar radiation in order to suppress temperature differences in the insulating liquid 14. In extreme minus temperatures, heating should also be possible.
- the installation of the device according to the invention must be horizontal.
- the thus installed tank 1 has the following procedure:
- the manifold 18 includes a pressure sensor 23 and a valve 24 that communicates with the atmosphere. If changes in the oil level in the expansion tank 10, the oil level in the outer tank 1 increases with decrease of the boiler oil temperature in the direction T u , or in the inner tank 3 with increase of the boiler oil temperature in the direction T o .
- tank 1 and tank 3 and the filling volume of the insulating liquid 14 are calculated so that within the selected operating temperatures T u and T o the air pressures in the expansion vessel 10 are within predetermined pressures, which can be optimally in the natural range of variation of the atmospheric pressure.
- T u and T o For the choice of the operating temperatures T u and T o , it is often sufficient to refer to the highest summer temperature and the lowest winter temperature of the boiler oil during power operation. At temperatures below T u then a limited supply of air from the atmosphere can be accepted. The only small oxygen input is consumed again in the dissolved state.
- the added oil column height in the outer tank 1 and inner tank 3 is the time-varying diffusion barrier for gases, especially for oxygen.
- Parallel to the air buffering in the outer tank 1 takes place in the expansion vessel 10, a constant gas exchange between the air and the convective boiler oil instead.
- the Dissolved oxygen is consumed with onset of thermal aging of the insulation system in the active part. Due to constant feedback, these processes, the oxygen content of the air in the expansion vessel 10 or also in the buffer space 15 is increasingly decreasing. As a result, the replenishment of oxygen from the expansion vessel 10 stops in the boiler. The maximum lowering of oxygen is limited by the quality of the diffusion barrier.
- the expansion vessel 10 and the outer tank 1 can be flushed directly into the filling line 19 of the expansion vessel 10 via the one-way valve 11 by introducing inert gas directly with the process application.
- the monitoring of the effectiveness of the reduction in the oxygen content can be occupied by air samples from the one-way valve 11.
- the criterion for the effectiveness of lowering the oxygen content in the expansion vessel 10 can only be the absolute oxygen content in the airspace itself. About him can be concluded on the dissolved oxygen levels, not the other way around.
- inert gas is passed through a valve 13, which is controlled by a float switch 12 on the shell of the outer tank 1, the outer Tank 1 supplied.
- the maximum Inertgaszu operation until the overpressure to atmospheric pressure, which is calculated in the simplest case possible over a time limit. Since no air from the outside enters the system, u.a. the dehumidifier is spared.
- This version is preferable for new start-up and operating conditions where degassed insulating fluid is present.
- valve 13 instead of valve 24 can be switched when falling below the controlled by sensor 23 negative pressure to atmospheric pressure.
- a buffer bag can also be connected via the connection piece 25.
- a possible, not further shown embodiment is that a larger closed tank is connected via a connecting piece with the dehumidifier 9 of the expansion vessel 10 and a second smaller tank having a bottom and is arranged adjacent to the outer tank, so that a wall shared. In the shared wall, a pipe joint at a predetermined height is arranged in the lower area. An insulating liquid with predetermined filling volume is contained in both tanks, so that form a buffer space in the larger tank and a compensation space in the smaller tank. In the upper part of the jacket or in the lid of the smaller tank, a compensating tube is inserted, which is bent and open at the bottom.
- the method according to the invention can also be used with expansion vessels with separating membrane.
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Reduzierung der Luftzuführung aus der Atmosphäre in das Ausdehnungsgefäß von mit Isolierflüssigkeit gefüllten Hochspannungsanlagen. Die Erfindung betrifft darüber hinaus eine Vorrichtung zur Durchführung des Verfahrens, deren Gestaltung sich bei der Neuinbetriebnahme von Transformatoren von der bei Transformatoren mit schon eingesetzter thermischer Alterung unterscheidet.The invention relates to a method for reducing the supply of air from the atmosphere in the expansion vessel filled with insulating high-voltage systems. The invention also relates to a device for carrying out the method, the design of which differs when new starting up of transformers from the already used in transformers thermal aging.
Hochspannungsanlagen, z.B. Transformatoren, werden zur Kühlung mit Isolierflüssigkeiten, z.B. Mineralöl, gefüllt. Belastungsänderungen sowie Schwankungen der Kühlanlagenleistungen und auch der Außentemperaturen führen zu deutlichen Temperaturänderungen und damit Volumenänderungen der Ölfüllung. Letztere werden durch Ausdehnungsgefäße oberhalb des Transformatortanks aufgenommen. In Ihnen besteht ein Direktkontakt des Ölspiegels mit der atmosphärischen Luft. Der Druckausgleich zur Atmosphäre erfolgt über eine Rohrleitung, die an ihrem Ende mit einem Luftentfeuchter und einer Ölglocke verschlossen ist. Zusätzlich tritt eine Luftzuführung aus der Atmosphäre auf, wenn mit einsetzender thermischer Alterung Sauerstoff im Aktivteil des Transformators verbraucht wird sowie bei entgasten Isolierflüssigkeiten während der Rücksättigung (Neuinbetriebnahmen, Reparaturen). Obwohl dieses klassische Abschlusssystem zur Atmosphäre sich in Europa bewährt hat, führen Entwicklungen davon weg und hin zu Abschlusssystemen mit Luftabschluss - hauptsächlich um den Sauerstoff auszuschließen, aber auch um den Aufwand der Luftentfeuchtung zu umgehen. Beim Sauerstoff wird ein direkter Zusammenhang zur Lebensdauer des Isolationssystems gesehen. Kriterien dafür fehlen ebenso wie zuverlässige Analysenverfahren zu deren Überwachung.High-voltage systems, eg transformers, are filled with insulating liquids, eg mineral oil, for cooling. Load changes as well as fluctuations of the cooling system capacities and also the outside temperatures lead to significant temperature changes and thus volume changes of the oil filling. The latter are taken up by expansion vessels above the transformer tank. In you there is a direct contact of the oil level with the atmospheric air. The pressure equalization to the atmosphere via a pipe, which is closed at its end with a dehumidifier and an oil bell. In addition, an air supply from the atmosphere occurs when with the onset of thermal aging of oxygen in the active part of the transformer is consumed as well as degassed insulating fluids during re-saturation (re-commissioning, repairs). Although this classic atmosphere settlement system has been proven in Europe, it is moving away from it and towards air-termination systems - mainly around oxygen to exclude, but also to avoid the burden of dehumidification. For oxygen, a direct relationship to the life of the insulation system is seen. Criteria for this as well as reliable analytical methods for their monitoring are missing.
Die bekannten technischen Lösungen ersetzen den direkten Luftkontakt durch trennende Membranen oder schließen in dem Ausdehnungsgefäß Stickstoff oder Vakuum ein. Diese Lösungen haben folgende Nachteile:
- hohe Kosten, insbesondere bei Nachrüstungen;
- Nachrüstung bei abgeschaltetem Zustand;
- fehlende Kriterien zur Wirksamkeit;
- die beabsichtigte Totalentfernung des Sauerstoffs ist durch technische Grenzen nicht umsetzbar.
- high costs, especially for retrofits;
- Retrofit when switched off;
- lack of effectiveness criteria;
- the intended total removal of oxygen is not feasible due to technical limitations.
Da die komplexe Rolle des Sauerstoffs noch unzureichend aufgeklärt ist, gilt bisher nur die Forderung nach Absenkung als gesichert.Since the complex role of oxygen is still insufficiently elucidated, so far only the demand for subsidence has been confirmed.
Bekannt sind Techniken, die im Öl selbst eine Separierung des Aktivteils vornehmen. So wird in
Die oben genannten Nachteile treffen auch auf diese Techniken zu.The above-mentioned disadvantages also apply to these techniques.
Ziel der eigenen Erfindung ist es, das Ausdehnungsgefäß insbesondere mit direktem Luftkontakt zu ertüchtigen, um eine nachhaltige Absenkung des Sauerstoffgehaltes zu erhalten und den Feuchteeintrag aus der Atmosphäre zu senken.The aim of one's invention is to make the expansion vessel, in particular with direct air contact, in order to obtain a sustainable reduction of the oxygen content and to reduce the moisture input from the atmosphere.
Aufgabe der Erfindung ist es, einen mit dem Ausdehnungsgefäß der Hochspannungsanlage verbundenen, nicht absperrbaren Luftpufferraum zu schaffen, der in vorgegebenen Grenzen den durch den Gashaushalt des Isolierflüssigkeitssystems verursachten Lufteintrag aus der Atmosphäre einschränkt und auszunutzen, dass mit einsetzender thermischer Alterung des Isolationssystems gleichzeitig in der Flüssigkeit gelöster Sauerstoff verbraucht wird, um so eine Absenkung des Sauerstoffgehaltes der Luft im Ausdehnungsgefäß zu bekommen und damit durch ständige Rückkopplung den Sauerstoffverbrauch abzusenken sowie den Feuchteeintrag zu senken.The object of the invention is to provide a connected to the expansion vessel of the high voltage system, non-lockable air buffer space, which restricts the use of air caused by the gas budget of the Isolierflüssigkeitssystems air entry from the atmosphere and utilize that with the onset of thermal aging of the insulation system simultaneously in the liquid Dissolved oxygen is consumed, so as to get a reduction in the oxygen content of the air in the expansion vessel and thus reduce the oxygen consumption by continuous feedback and to reduce the moisture input.
Zur Lösung der Aufgabe werden folgende Erkenntnisse über Ausdehnungsgefäße insbesondere mit direktem Luftkontakt herangezogen:
- nach Neuinbetriebnahme von Transformatoren erreicht das Kesselöl in einer Zeitspanne von 6 Wochen bis zu 18 Monaten die Luftsättigung (NIS-Kriterium).
- eine Sättigungskonzentration für Luftsauerstoff von ca. 32000 ppm bleibt viele Jahre erhalten, solange, bis der thermische Abbau des Isolationssystems einsetzt und Oxidationsreaktionen ablaufen;
- die Absenkung der Sauerstoffkonzentration im Öl hat keinen Einfluss auf den Sauerstoffgehalt im Luftraum des Ausdehnungsgefäßes (nur bei thermischen Anomalien festgestellt), da eine schnelle Nachlieferung aus der Atmosphäre erfolgt.
- After new commissioning of transformers, the boiler oil reaches the air saturation in a period of 6 weeks to 18 months (NIS criterion).
- a saturation concentration for atmospheric oxygen of about 32,000 ppm is maintained for many years, until the thermal degradation of the insulation system begins and oxidation reactions take place;
- the lowering of the oxygen concentration in the oil has no influence on the oxygen content in the air space of the expansion vessel (only detected in the case of thermal anomalies), as there is a rapid re-delivery from the atmosphere.
Die Aufgabe wird durch die in den Ansprüchen dargestellten Merkmale gelöst. Dabei ist die Grundidee, einen externen Atmungspuffer wählbar in Kombination mit dem Einsatz eines Inertgases zu nutzen.The object is solved by the features illustrated in the claims. The basic idea is to use an external breathing buffer selectable in combination with the use of an inert gas.
Das erfindungsgemäße Verfahren ist dadurch gekennzeichnet, dass
- bis zu einem vorgegebenen Überdruck zum Atmosphärendruck Gas aus dem Ausdehnungsgefäß in einen externen Pufferraum übernommen wird,
- bis zu einem vorgegebenen Unterdruck zum Atmosphärendruck Gas aus einem externen Pufferraum in das Ausdehnungsgefäß übernommen wird,
- wobei das Puffervolumen von einer unteren und einer oberen Arbeitstemperatur (Tu, To) der Isolierflüssigkeit in der Hochspannungsanlage mitbestimmt wird.
- is taken up to a predetermined pressure to atmospheric pressure gas from the expansion vessel in an external buffer space,
- is taken up to a predetermined negative pressure to atmospheric pressure gas from an external buffer space in the expansion vessel,
- wherein the buffer volume of a lower and an upper operating temperature (T u , T o ) of the insulating liquid in the high-voltage system is co-determined.
Bei Überschreitung des Überdrucks zum Atmosphärendruck wird Gas aus dem Pufferraum über eine Rohröffnung im Mantel eines inneren, kleineren Tanks abgegeben.When the overpressure to atmospheric pressure is exceeded, gas is released from the buffer space via a pipe opening in the shell of an inner, smaller tank.
Bei Unterschreitung des Unterdrucks zum Atmosphärendruck wird Luft aus der Atmosphäre über ein Ausgleichsrohr und eine Rohröffnung im Mantel eines inneren, kleineren Tanks in den Pufferraum übernommen.When the pressure drops below the atmospheric pressure, air is taken from the atmosphere via a compensating pipe and a pipe opening in the jacket of an inner, smaller tank into the buffer space.
In einer Ausführungsform wird zur schnelleren und stärkeren Reduzierung der Luftzuführung aus der Atmosphäre bei Unterschreitung des Überdrucks zum Atmosphärendruck ein Inertgas in den Pufferraum zugeführt.In one embodiment, an inert gas is fed into the buffer space for faster and greater reduction of the air supply from the atmosphere when the pressure falls below the atmospheric pressure.
In einer weiteren Ausführungsform kann die Stabilität des Gashaushaltes dadurch verbessert werden, dass im Pufferraum für den Absolutdruck eine Ober- und Untergrenze festgelegt sind, außerhalb derer ein Druckausgleich mit der Atmosphäre stattfindet.In another embodiment, the stability of the gas balance can be improved by setting an upper and lower limit in the buffer space for the absolute pressure, outside of which a pressure equalization with the atmosphere takes place.
Ein besonderer Vorteil entsteht, wenn unmittelbar mit der Verfahrensanwendung das Ausdehnungsgefäß und der Pufferraum mit einem Inertgas gespült werden. Als Inertgas wird Stickstoff verwendet.A particular advantage arises when the expansion vessel and the buffer space are flushed with an inert gas directly with the process application. Nitrogen is used as the inert gas.
Durch eine Reduzierung des Füllvolumens an Isolierflüssigkeit in den Tanks wird die Reduzierung der Luftzuführung aus der Atmosphäre verringert. Andererseits wird durch den Anschluss von mehreren Tanks über eine Sammelleitung an den Luftentfeuchter des Ausdehnungsgefäßes die Reduzierung der Luftzuführung aus der Atmosphäre in das Ausdehnungsgefäß vergrößert. Das gleiche kann erreicht werden, wenn der Pufferraum eines Tanks mit einem luftundurchlässigen Puffersack vergrößert wird.By reducing the filling volume of insulating liquid in the tanks, the reduction of air supply from the atmosphere is reduced. On the other hand, by connecting several tanks via a manifold to the Dehumidifier of the expansion tank increases the reduction of the air supply from the atmosphere into the expansion tank. The same can be achieved if the buffer space of a tank with an air-impermeable buffer bag is increased.
Um die Wirksamkeit der Reduzierung der Luftzuführung aus der Atmosphäre in das Ausdehnungsgefäß nachzuweisen, wird der absolute Sauerstoffgehalt im Ausdehnungsgefäß gemessen.In order to demonstrate the effectiveness of reducing the supply of air from the atmosphere to the expansion tank, the absolute oxygen content in the expansion tank is measured.
Das Verfahren kann sowohl bei Ausdehnungsgefäßen mit Direktkontakt zwischen Isolierflüssigkeit und Gasraum als auch bei Ausdehnungsgefäßen mit trennender Membran angewendet werden.The method can be used both in expansion vessels with direct contact between insulating liquid and gas space as well as in expansion vessels with separating membrane.
Die erfindungsgemäße Vorrichtung besteht aus einem äußeren geschlossenen, zylindrischen Tank, in dessen Deckel ein zweiter kleinerer, zylindrischer innerer Tank mit einem Deckel eingesetzt ist. Dieser ist nach unten offen und zum Boden des äußeren Tanks beabstandet. Im unteren Mantelbereich führt eine Rohröffnung in den oberen Bereich des Kompensationsraums des inneren Tanks. Der äußere Tank ist über einen Stutzen mit dem Luftentfeuchter des Ausdehnungsgefäßes verbunden. Vom Kompensationsraum des inneren Tank führt ein waagerechtes Rohr, welches als nach unten geöffneter Rohrbogen endet, durch den Mantel des äußeren Tanks nach draußen. In dem äußeren und inneren Tank ist eine Isolierflüssigkeit mit genau bemessenem Füllvolumen enthalten, so dass sich im äußeren Tank ein Pufferraum und im inneren Tank ein Kompensationsraum bilden. Am äußeren Tank ist vorzugsweise im oberen Bereich des Mantels ein Einweghahn angeordnet. Am Mantel des äußeren Tanks kann ebenso ein Schwimmerschalter angeordnet sein, der über ein Ventil mit einem Druckbehälter eines Inertgases verbunden ist.The device according to the invention consists of an outer closed, cylindrical tank, in whose lid a second smaller, cylindrical inner tank is inserted with a lid. This is open at the bottom and spaced from the bottom of the outer tank. In the lower casing area, a pipe opening leads into the upper area of the compensation space of the inner tank. The outer tank is connected via a connection with the dehumidifier of the expansion tank. From the compensation chamber of the inner tank, a horizontal pipe, which ends as a downwardly open pipe bend, leads out through the outer tank shell. In the outer and inner tank an insulating liquid is contained with exactly sized filling volume, so that form a buffer space in the outer tank and a compensation space in the inner tank. At the outer tank, a one-way cock is preferably arranged in the upper region of the jacket. On the shell of the outer tank, a float switch may also be arranged, which is connected via a valve to a pressure vessel of an inert gas.
Die Abmessung beider Tanks sowie das Füllvolumen der Isolierflüssigkeit sind von den ausgewählten Arbeitstemperaturen, den vorgegebenen Drücken und den Isolierflüssigkeitseigenschaften abgeleitet.The dimensions of both tanks as well as the filling volume of the insulating liquid are derived from the selected operating temperatures, the given pressures and the Isolierflüssigkeitseigenschaften.
Zur Vergrößerung des Arbeitsvolumens von Pufferraum und Kompensationsraum sind mehrere Vorrichtungen über eine Sammelleitung mit dem Luftentfeuchter des Ausdehnungsgefäßes zusammengeschaltet. Zur Vergrößerung des Pufferraumes kann dieser mit einem volumenveränderlichen Puffersack verbunden sein. In der Sammelleitung kann ein Drucksensor in Verbindung mit einem frei zur Atmosphäre öffnenden Ventil eingebracht sein.To increase the working volume of buffer space and compensation space several devices are interconnected via a manifold with the dehumidifier of the expansion vessel. To increase the buffer space, this can be connected to a volume-variable buffer bag. In the Manifold can be introduced a pressure sensor in conjunction with a freely opening to the atmosphere valve.
Als eine mögliche Ausgestaltung können der äußere und der innere Tank kubisch oder quaderförmig sein.As one possible embodiment, the outer and inner tanks may be cubic or cuboid.
In einer weiteren Ausgestaltung besitzt der innere Tank einen Boden und ist neben dem äußeren Tank in der Art angeordnet, dass eine Wand gemeinsam genutzt wird, in deren unteren Bereich eine Rohrverbindung in vorgegebener Höhe angeordnet ist.In a further embodiment, the inner tank has a bottom and is arranged next to the outer tank in the manner that a wall is shared, in the lower region of a pipe joint is arranged at a predetermined height.
Gegen äußere Witterungsverhältnisse ist ein Schutz vor Sonneneinstrahlung und gegen extreme Minustemperaturen eine Beheizung vorgesehen.Against external weather conditions a protection against sun radiation and against extreme minus temperatures a heating is intended.
Die gesamte Vorrichtung ist nicht absperrbar.The entire device is not lockable.
Das erfindungsgemäße Verfahren und die Vorrichtung zur Durchführung des Verfahrens bringen folgende Vorteile:
- der Abbau des Isolationssystems durch die Beschleuniger Feuchte und Sauerstoff kann eingeschränkt und die Lebensdauer der Hochspannungsanlage verlängert werden;
- der in der Flüssigkeit gelöste Sauerstoff gelangt durch Konvektion in die Hochspannungsanlage und wird mit einsetzender thermischer Alterung des Isolationssystems verbraucht, ohne dass von außen neuer Sauerstoff zugeführt wird;
- aus der Routineüberwachung heraus kann der Zeitpunkt der Installation der Vorrichtung ermittelt werden; der spätestens mit dem Beginn der thermischen Alterung des Isolationssystems beginnen sollte;
- die Anschaffung und Installation sind preisgünstig, es ist keine Betriebsunterbrechung erforderlich für die Installation;
- die Wirksamkeit der Sauerstoffabsenkung kann durch Analysen im Gas des Ausdehnungsgefäßes verfolgt werden;
- über den Füllstand der Isolierflüssigkeit in der Vorrichtung kann die Wirksamkeit der Sauerstoffabsenkung verändert werden;
- die Zusammenschaltung mehrerer Vorrichtungen und/oder die Kopplung einer Vorrichtung mit einem Puffersack gestattet die Anpassung an die Größe des Ausdehnungsgefäßes sowie die Wirksamkeit der Sauerstoffabsenkung;
- der Einsatz der Vorrichtung ist wartungsfrei und entlastet auch die Arbeitsweise des Luftentfeuchters am Ausdehnungsgefäß;
- die Dosierung eines Inertgases bei Unterschreitung des Unterdrucks zum Atmosphärendruck ermöglicht eine schnellere und stärkere Reduzierung der Luftzuführung aus der Atmosphäre;
- das offene Abschlusssystem des Transformators wird in ein quasi geschlossenes überführt, wobei im Ausdehnungsgefäß ein näherungsweises Online - Gleichgewichtsgas entsteht, was für die analytische Überwachung sehr interessant ist.
- the degradation of the insulation system by the accelerators moisture and oxygen can be limited and the life of the high-voltage system extended;
- The dissolved oxygen in the liquid passes through convection in the high voltage system and is consumed with onset of thermal aging of the insulation system, without new oxygen is supplied from the outside;
- from the routine monitoring the time of installation of the device can be determined; which should begin at the latest with the beginning of the thermal aging of the insulation system;
- The purchase and installation are inexpensive, there is no operational interruption required for the installation;
- the effectiveness of the oxygen lowering can be monitored by analyzes in the gas of the expansion vessel;
- over the level of the insulating liquid in the device, the effectiveness of the oxygen lowering can be changed;
- the interconnection of several devices and / or the coupling of a device with a buffer bag allows adaptation to the size of the expansion vessel and the effectiveness of the oxygen reduction;
- The use of the device is maintenance-free and also relieves the operation of the dehumidifier on the expansion tank;
- the metering of an inert gas when the pressure drops below the atmospheric pressure enables a faster and greater reduction of the supply of air from the atmosphere;
- the open termination system of the transformer is transformed into a quasi - closed one, whereby an approximate on - line equilibrium gas is created in the expansion vessel, which is very interesting for the analytical supervision.
Die Erfindung wird anhand von Zeichnungen erläutert. Hierzu zeigen
Figur 1- die schematische Darstellung der erfindungsgemäßen Vorrichtung an ein Ausdehnungsgefäß angeschlossen,
Figur 2- eine Ausführungsform mit zusätzlichen Schwimmkörpern sowie den Stutzen für einen Puffersack und
Figur 3- die schematische Darstellung mehrere über- und nebeneinander gestapelter Vorrichtungen.
- FIG. 1
- the schematic representation of the device according to the invention connected to an expansion vessel,
- FIG. 2
- an embodiment with additional floats and the nozzle for a buffer bag and
- FIG. 3
- the schematic representation of several stacked and side by side stacked devices.
Der Mantel von Tank 1 besitzt unterhalb des oberen Randes einen Stutzen 7, sowie einen Einweghahn 11. Am Mantel des äußeren Tanks 1 ist im unteren Bereich ein Schwimmerschalter 12 angeordnet, der über ein Ventil 13 mit einem Druckbehälter eines Inertgases verbunden ist. Im oberen Teil des Mantels des inneren Tanks 3 ist ein Ausgleichsrohr 8 eingefügt und führt waagerecht durch den Mantel des äußeren Tanks 1 nach außen und ist nach unten geöffnet.The jacket of
Der Deckel 6 von Tank 3 wird entfernt und Tank 1 und 3 werden mit einem genau bestimmten Volumen einer Isolierflüssigkeit 14, z.B. Transformatoröl, die ohne Qualitätsanforderungen sein kann, teilgefüllt. Damit entsteht im äußeren Tank 1 oberhalb der Isolierflüssigkeit 14 ein Pufferraum 15, der über den Luftentfeuchter 9 mit dem Luftraum des Ausdehnungsgefäßes 10 verbunden ist und mit diesem eine Einheit bildet. Im Tank 3 befindet sich oberhalb der Isolierflüssigkeit 14 der Kompensationsraum 16. Die Isolierflüssigkeit 14 hat die Aufgabe einer Diffusionssperre für Sauerstoff zwischen der Luft im Ausdehnungsgefäß 10 und der Atmosphäre. Die Rohröffnung 4 in Rohr 5 dient dazu, den freien Gasaustausch zwischen Pufferraum 15 und der Atmosphäre zu übernehmen, um die Isolierflüssigkeit 14 als Diffusionssperre nicht zu bewegen. Um diese Wirkung zu erhöhen, können Schwimmkörper 17 zur Abdeckung der Isolierflüssigkeitsoberfläche im Tank 3 und Rohr 5 eingebracht werden. Zur Verstärkung der Diffusionssperre kann Rohr 5 auch ein U-Rohr 20 sein, das unten Öffnungen 21 besitzt und auch durch Tank 1 geht, wobei dann dort auch Schwimmkörper 17 eingebracht werden (
Die Abmessungen beider Tanks 1 und 3 sowie das Füllvolumen der Isolierflüssigkeit 14 sind von den ausgewählten Arbeitstemperaturen, den vorgegebenen Drücken und den Isolierflüssigkeitseigenschaften abgeleitet.The dimensions of both
Der äußere Tank 1 ist vorzugsweise von außen gegen Sonneneinstrahlung geschützt, um Temperaturdifferenzen in der Isolierflüssigkeit 14 zu unterdrücken. Bei extremen Minustemperaturen sollte außerdem eine Beheizung möglich sein. Die Aufstellung der erfindungsgemäßen Vorrichtung muss waagerecht erfolgen.The
Der Anschluss vom äußeren Tank 1 an den Luftentfeuchter 9 erfolgt über eine Sammelleitung 18 bei dem herrschenden Atmosphärendruck und einem Ölspiegel im Ausdehnungsgefäß 10 zwischen den gedachten Marken U und O, denen die Arbeitstemperaturen Tu und To zugeordnet sind und die innerhalb der Minimum/Maximum - Werte liegen. Die Sammelleitung 18 enthält einen Drucksensor 23 und ein Ventil 24, das Verbindung zur Atmosphäre hat. Erfolgen Änderungen des Ölspiegels im Ausdehnungsgefäß 10, steigt der Ölspiegel im äußeren Tank 1 bei Abnahme der Kesselöltemperatur in Richtung Tu, oder im inneren Tank 3 bei Zunahme der Kesselöltemperatur in Richtung To. Die Abmessungen von Tank 1 und Tank 3 sowie das Füllvolumen der Isolierflüssigkeit 14 sind so berechnet, dass innerhalb der gewählten Arbeitstemperaturen Tu und To die Luftdrücke im Ausdehnungsgefäß 10 innerhalb vorgegebener Drücke liegen, welche optimal im natürlichen Schwankungsbereich des Atmosphärendrucks liegen können.The connection from the
Für außerhalb der Arbeitstemperaturen Tu und To liegende Temperaturen erfolgt der Eintritt von Atmosphärenluft in den äußeren Tank 1 bzw. die Abgabe von Luft aus dem Ausdehnungsgefäß 10 über Tank 1. Schwankungen des Atmosphärendruckes werden über den äußeren Tank 1 leicht abgepuffert.For temperatures outside the working temperatures T u and T o , the entry of atmospheric air into the
Für die Wahl der Arbeitstemperaturen Tu und To ist es oft ausreichend, bei Leistungsbetrieb die höchste Sommertemperatur und die niedrigste Wintertemperatur des Kesselöls als Bezug zu nehmen. Bei Temperaturen unter Tu kann dann eine begrenzte Luftzufuhr aus der Atmosphäre akzeptiert werden. Der nur geringe Sauerstoffeintrag wird im gelösten Zustand wieder verbraucht.For the choice of the operating temperatures T u and T o , it is often sufficient to refer to the highest summer temperature and the lowest winter temperature of the boiler oil during power operation. At temperatures below T u then a limited supply of air from the atmosphere can be accepted. The only small oxygen input is consumed again in the dissolved state.
Beim Aufwärmen über die Temperatur To wird Luft in die Atmosphäre abgegeben. Erfindungsgemäß liegt damit zwischen den gesetzten Druckgrenzen ein selbstregulierendes, natürliches System vor, welches keinerlei Wartung benötigt. Damit die Überlagerung extremer Atmosphärendruckwerte mit möglichen Arbeitsbedingungen nicht zur Vergrößerung des nur durch Atmosphärendruckschwankungen gegebenen Druckbereiches führen kann, wird der Druck mit Sensor 23 gemessen. Bei Abweichungen vom vorgegebenen Druckbereich erfolgt über Ventil 24 der Ausgleich mit der Atmosphäre rechtzeitig.When warming up above the temperature T o , air is released into the atmosphere. According to the invention, there is thus a self-regulating, natural system between the set pressure limits, which does not require any maintenance. So that the superposition of extreme atmospheric pressure values with possible working conditions can not lead to an increase in the pressure range given only by atmospheric pressure fluctuations, the pressure with
Die addierte Ölsäulenhöhe im äußeren Tank 1 und inneren Tank 3 ist die sich zeitlich ändernde Diffusionssperre für Gase, insbesondere für Sauerstoff. Parallel zur Luftpufferung im äußeren Tank 1 findet im Ausdehnungsgefäß 10 ein ständiger Gasaustausch zwischen der Luft und dem konvektierenden Kesselöl statt. Der gelöste Sauerstoff wird mit einsetzender thermischer Alterung des Isolationssystems im Aktivteil verbraucht. Durch ständige Rückkopplung, dieser Abläufe senkt sich zunehmend der Sauerstoffgehalt der Luft im Ausdehnungsgefäß 10 bzw. auch im Pufferraum 15 ab. Als Ergebnis hört die Nachlieferung von Sauerstoff aus dem Ausdehnungsgefäß 10 in den Kessel auf. Der maximalen Absenkung des Sauerstoffs wird durch die Qualität der Diffusionssperre eine Grenze gesetzt.The added oil column height in the
Bei höheren Anforderungen an eine schnelle bzw. stärkere Absenkung des Sauerstoffgehaltes der Luft im Ausdehnungsgefäß 10 können auch unmittelbar mit der Verfahrensanwendung das Ausdehnungsgefäß 10 und der äußere Tank 1 durch Einleitung von Inertgas in die Füllleitung 19 des Ausdehnungsgefäßes 10 über den Einweghahn 11 gespült werden.For higher demands on a rapid or greater reduction of the oxygen content of the air in the
Die Überwachung der Wirksamkeit der Absenkung des Sauerstoffgehaltes kann durch Luftproben aus dem Einweghahn 11 belegt werden.The monitoring of the effectiveness of the reduction in the oxygen content can be occupied by air samples from the one-
Das Kriterium für die Wirksamkeit der Absenkung des Sauerstoffgehaltes im Ausdehnungsgefäß 10 kann nur der absolute Sauerstoffgehalt im Luftraum selbst sein. Über ihn kann auf die gelösten Sauerstoffgehalte geschlossen werden, nicht umgekehrt.The criterion for the effectiveness of lowering the oxygen content in the
In einer weiteren Ausführung, die verhindern soll, dass bei Unterschreitung eines vorgegebenen Unterdrucks zum Atmosphärendruck Luft aus der Atmosphäre in den Pufferraum 15 gelangt, wird Inertgas über ein Ventil 13, welches durch einen Schwimmerschalter 12 am Mantel des äußeren Tanks 1 gesteuert wird, dem äußeren Tank 1 zugeführt. Dabei kann die Inertgaszuführung maximal bis zum Erreichen des Überdrucks zum Atmosphärendruck erfolgen, was im einfachsten Fall berechnet über eine Zeitbegrenzung möglich ist. Da so keine Luft von außen in das System eindringt, wird u.a. der Luftentfeuchter geschont.In a further embodiment, which is intended to prevent air from reaching the atmospheric pressure in the
Diese Ausführung ist für Neuinbetriebnahmen und Betriebszuständen, bei denen entgaste Isolierflüssigkeit vorliegt, vorzuziehen.This version is preferable for new start-up and operating conditions where degassed insulating fluid is present.
In einer weiteren Ausführung kann bei Unterschreiten des durch Sensor 23 kontrollierten Unterdrucks zum Atmosphärendruck kann Ventil 13 statt Ventil 24 geschaltet werden.In a further embodiment,
Für die Abmessung der erfindungsgemäßen Vorrichtung in
Eine mögliche, hier nicht weiter gezeigte Ausführungsform besteht darin, dass ein größerer geschlossener Tank über einen Stutzen mit dem Luftentfeuchter 9 des Ausdehnungsgefäßes 10 verbunden ist und ein zweiter kleinerer Tank, der einen Boden besitzt und neben dem äußeren Tank angeordnet ist, so dass eine Wand gemeinsam genutzt wird. In der gemeinsam genutzten Wand ist im unteren Bereich eine Rohrverbindung in vorgegebener Höhe angeordnet. Eine Isolierflüssigkeit mit vorgegebenen Füllvolumen ist in beiden Tanks enthalten, so dass sich im größeren Tank ein Pufferraum und im kleineren Tank ein Kompensationsraum bilden. Im oberen Teil des Mantels oder im Deckel des kleineren Tanks ist ein Ausgleichsrohr eingefügt, welches gebogen und nach unten geöffnet ist.A possible, not further shown embodiment is that a larger closed tank is connected via a connecting piece with the
Das erfindungsgemäße Verfahren kann auch bei Ausgleichsgefäßen mit trennender Membran angewendet werden.The method according to the invention can also be used with expansion vessels with separating membrane.
- 11
- äußerer Tankouter tank
- 22
- Deckelcover
- 33
- innerer Tankinner tank
- 44
- Rohröffnungtube opening
- 55
- Rohrpipe
- 66
- Deckelcover
- 77
- StutzenSupport
- 88th
- Ausgleichsrohrbalance pipe
- 99
- LuftentfeuchterDehumidifiers
- 1010
- Ausdehnungsgefäßexpansion tank
- 1111
- Einweghahnstopcock
- 1212
- Schwimmerschalterfloat switch
- 1313
- VentilValve
- 1414
- Isolierflüssigkeitinsulating
- 1515
- Pufferraumbuffer space
- 1616
- Kompensationsraumcompensation chamber
- 1717
- Schwimmkörperfloat
- 1818
- Sammelleitungmanifold
- 1919
- Füllleitungfilling line
- 2020
- U-RohrU-tube
- 2121
- Öffnungenopenings
- 2222
- Deckelcover
- 2323
- Drucksensorpressure sensor
- 2424
- VentilValve
- 2525
- Stutzen mit VerschlussNeck with closure
Claims (16)
gekennzeichnet dadurch, dass
characterized in that
bei Überschreiten des Überdrucks zum Atmosphärendruck Gas aus dem Pufferraum (15) über eine Rohröffnung (4) im Mantel eines inneren, kleineren Tanks (3), welcher sich in einem Deckel (2) eines äußeren Tanks (1) befindet, abgegeben wird.A method according to claim 1, characterized in that
when the overpressure to atmospheric pressure gas from the buffer space (15) through a pipe opening (4) in the shell of an inner, smaller tank (3), which is in a lid (2) of an outer tank (1) is discharged.
bei Unterschreiten des Unterdrucks zum Atmosphärendruck Luft aus der Atmosphäre über ein Ausgleichsrohr (8) und eine Rohröffnung (4) im Mantel eines inneren, kleineren Tanks (3), welcher sich in einem Deckel (2) eines äußeren Tanks (1) befindet, in den Pufferraum (15) übernommen wird.A method according to claim 1, characterized in that
falls below the negative pressure to the atmospheric pressure air from the atmosphere via a balance pipe (8) and a pipe opening (4) in the shell of an inner, smaller tank (3), which is in a cover (2) of an outer tank (1), in the buffer space (15) is taken over.
zur schnelleren und stärkeren Reduzierung der Luftzuführung aus der Atmosphäre bei Unterschreiten des Unterdrucks zum Atmosphärendruck ein Inertgas in den Pufferraum (15) maximal bis zum Erreichen des Überdrucks zum Atmosphärendruck zugeführt wird.A method according to claim 1, characterized in that
for faster and greater reduction of the air supply from the atmosphere when falling below the negative pressure to atmospheric pressure, an inert gas in the buffer space (15) is supplied to a maximum until reaching the overpressure to atmospheric pressure.
unmittelbar mit der Verfahrensanwendung das Ausdehnungsgefäß (10) und der Pufferraum (15) mit einem Inertgas gespült werden.A method according to claim 1 or 4, characterized in that
immediately with the process application, the expansion vessel (10) and the buffer space (15) are flushed with an inert gas.
der Absolutdruck in der Sammelleitung (18) gemessen wird und bei Abweichungen zu einer vorgegebenen Obergrenze ein Druckausgleich mit der Atmosphäre über ein Ventil (24) oder bei Abweichungen zu einer Untergrenze ein Druckausgleich mit der Atmosphäre über ein Ventil (24) oder Ventil (13) erfolgt.Method according to one of claims 1 to 7, characterized in that
the absolute pressure in the collecting line (18) is measured and, in the event of deviations from a predetermined upper limit, a pressure equalization with the atmosphere via a valve (24) or, in the event of deviations to a lower limit, a pressure equalization with the atmosphere via a valve (24) or valve (13) he follows.
der absolute Sauerstoffgehalt im Ausdehnungsgefäß (10) gemessen wird, um die Wirksamkeit der Reduzierung der Luftzuführung aus der Atmosphäre in das Ausdehnungsgefäß (10) nachzuweisen.Method according to one of claims 1 to 8, characterized in that
the absolute oxygen content in the expansion vessel (10) is measured to demonstrate the effectiveness of reducing the supply of air from the atmosphere to the expansion vessel (10).
am Mantel des äußeren oder größeren Tanks (1) ein Schwimmerschalter (12) angeordnet ist, der über ein Ventil (13) mit einem Druckbehälter eines Inertgases verbunden ist.Apparatus according to claim 10 or 11, characterized in that
on the jacket of the outer or larger tank (1) a float switch (12) is arranged, which is connected via a valve (13) with a pressure vessel of an inert gas.
in Tank (3) Schwimmkörper (17) eingefüllt sind.Apparatus according to claim 10, 11 or 12, characterized in that
in tank (3) floats (17) are filled.
das Rohr (5) als U-Rohr (20) ausgeführt ist, in dessen Boden Öffnungen (21) eingefügt sind, wobei im U-Rohr (20) und in Tank (1) und (3) Schwimmkörper (17) eingefüllt sind.Apparatus according to claim 10, 11 or 12, characterized in that
the tube (5) is designed as a U-tube (20), in whose bottom openings (21) are inserted, wherein in the U-tube (20) and in tank (1) and (3) floats (17) are filled.
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT08103545T ATE475974T1 (en) | 2008-04-15 | 2008-04-15 | METHOD FOR REDUCING THE SUPPLY OF AIR FROM THE ATMOSPHERE INTO THE EXPANSION VESSEL OF HIGH-VOLTAGE SYSTEMS FILLED WITH INSULATING FLUID AND DEVICE FOR IMPLEMENTING THE METHOD |
EP20080103545 EP2110822B1 (en) | 2008-04-15 | 2008-04-15 | Method for reducing the air supply from the atmosphere into the expansion tank of high voltage facilities filled with isolating fluid and device for carrying out the method |
DK08103545T DK2110822T3 (en) | 2008-04-15 | 2008-04-15 | Process for reducing the air supply from the atmosphere to the expansion vessel of high voltage plant filled with insulating fluid and device for carrying out the process |
PL08103545T PL2110822T3 (en) | 2008-04-15 | 2008-04-15 | Method for reducing the air supply from the atmosphere into the expansion tank of high voltage facilities filled with isolating fluid and device for carrying out the method |
DE200850001034 DE502008001034D1 (en) | 2008-04-15 | 2008-04-15 | Method for reducing the supply of air from the atmosphere into the expansion tank of insulating liquid-filled high-voltage systems and apparatus for carrying out the method |
CA2721603A CA2721603C (en) | 2008-04-15 | 2009-04-03 | Method for reducing the air supply from the atmosphere into the expansion vessel of high-voltage plants filled with insulating liquid, and an apparatus for carrying out the method |
AU2009237787A AU2009237787B2 (en) | 2008-04-15 | 2009-04-03 | Method for reducing the air feed from the atmosphere into the expansion vessel of high-voltage systems filled with insulating liquid and device for carrying out the method |
US12/988,157 US8607813B2 (en) | 2008-04-15 | 2009-04-03 | Method for reducing the air feed from the atmosphere into the expansion vessel of high-voltage systems filled with insulating liquid and device for carrying out the method |
BRPI0911202A BRPI0911202A2 (en) | 2008-04-15 | 2009-04-03 | process for reducing the air supply from the atmosphere in the expansion tank of high voltage systems filling with insulation fluid for process execution |
CN2009801134710A CN102017029B (en) | 2008-04-15 | 2009-04-03 | Method for reducing the air feed from the atmosphere into the expansion vessel of high-voltage systems filled with insulating liquid and device for carrying out the method |
RU2010146236/07A RU2490744C2 (en) | 2008-04-15 | 2009-04-03 | Method for reduction of air supply from atmosphere to expansion vessel of high-voltage installations filled with insulating liquid and device for implementation of this method |
PCT/EP2009/054018 WO2009127539A1 (en) | 2008-04-15 | 2009-04-03 | Method for reducing the air feed from the atmosphere into the expansion vessel of high-voltage systems filled with insulating liquid and device for carrying out the method |
KR1020107025506A KR20100132077A (en) | 2008-04-15 | 2009-04-03 | Method for reducing the air feed from the atmosphere into the expansion vessel of high-voltage systems filled with insulating liquid and device for carrying out the method |
JP2011504414A JP5404770B2 (en) | 2008-04-15 | 2009-04-03 | Method for reducing the air supply from the atmosphere into the expansion vessel in a high-voltage installation filled with insulating liquid, and apparatus for carrying out said method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP20080103545 EP2110822B1 (en) | 2008-04-15 | 2008-04-15 | Method for reducing the air supply from the atmosphere into the expansion tank of high voltage facilities filled with isolating fluid and device for carrying out the method |
Publications (2)
Publication Number | Publication Date |
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EP2110822A1 true EP2110822A1 (en) | 2009-10-21 |
EP2110822B1 EP2110822B1 (en) | 2010-07-28 |
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Application Number | Title | Priority Date | Filing Date |
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EP20080103545 Active EP2110822B1 (en) | 2008-04-15 | 2008-04-15 | Method for reducing the air supply from the atmosphere into the expansion tank of high voltage facilities filled with isolating fluid and device for carrying out the method |
Country Status (14)
Country | Link |
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US (1) | US8607813B2 (en) |
EP (1) | EP2110822B1 (en) |
JP (1) | JP5404770B2 (en) |
KR (1) | KR20100132077A (en) |
CN (1) | CN102017029B (en) |
AT (1) | ATE475974T1 (en) |
AU (1) | AU2009237787B2 (en) |
BR (1) | BRPI0911202A2 (en) |
CA (1) | CA2721603C (en) |
DE (1) | DE502008001034D1 (en) |
DK (1) | DK2110822T3 (en) |
PL (1) | PL2110822T3 (en) |
RU (1) | RU2490744C2 (en) |
WO (1) | WO2009127539A1 (en) |
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CN102698821B (en) * | 2012-06-19 | 2014-04-23 | 长沙理工大学 | Environment simulation laboratory with gas pressure balancing device |
EP2927916A1 (en) * | 2014-04-03 | 2015-10-07 | ABB Technology Ltd | A modular insulation fluid handling system |
EP3070724B1 (en) * | 2015-03-19 | 2019-05-08 | ABB Schweiz AG | Insulation liquid expansion assembly |
ES2808276T3 (en) * | 2017-02-28 | 2021-02-26 | General Electric Technology Gmbh | High voltage assembly |
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2008
- 2008-04-15 EP EP20080103545 patent/EP2110822B1/en active Active
- 2008-04-15 DE DE200850001034 patent/DE502008001034D1/en active Active
- 2008-04-15 AT AT08103545T patent/ATE475974T1/en active
- 2008-04-15 DK DK08103545T patent/DK2110822T3/en active
- 2008-04-15 PL PL08103545T patent/PL2110822T3/en unknown
-
2009
- 2009-04-03 CA CA2721603A patent/CA2721603C/en not_active Expired - Fee Related
- 2009-04-03 WO PCT/EP2009/054018 patent/WO2009127539A1/en active Application Filing
- 2009-04-03 KR KR1020107025506A patent/KR20100132077A/en not_active Application Discontinuation
- 2009-04-03 US US12/988,157 patent/US8607813B2/en not_active Expired - Fee Related
- 2009-04-03 BR BRPI0911202A patent/BRPI0911202A2/en not_active IP Right Cessation
- 2009-04-03 AU AU2009237787A patent/AU2009237787B2/en not_active Ceased
- 2009-04-03 RU RU2010146236/07A patent/RU2490744C2/en not_active IP Right Cessation
- 2009-04-03 CN CN2009801134710A patent/CN102017029B/en not_active Expired - Fee Related
- 2009-04-03 JP JP2011504414A patent/JP5404770B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
DE502008001034D1 (en) | 2010-09-09 |
JP5404770B2 (en) | 2014-02-05 |
AU2009237787B2 (en) | 2013-04-18 |
RU2010146236A (en) | 2012-05-20 |
JP2011517129A (en) | 2011-05-26 |
CA2721603A1 (en) | 2009-10-22 |
US20110114364A1 (en) | 2011-05-19 |
AU2009237787A1 (en) | 2009-10-22 |
RU2490744C2 (en) | 2013-08-20 |
EP2110822B1 (en) | 2010-07-28 |
CA2721603C (en) | 2016-07-26 |
ATE475974T1 (en) | 2010-08-15 |
BRPI0911202A2 (en) | 2015-10-13 |
DK2110822T3 (en) | 2010-11-22 |
WO2009127539A1 (en) | 2009-10-22 |
PL2110822T3 (en) | 2010-12-31 |
KR20100132077A (en) | 2010-12-16 |
US8607813B2 (en) | 2013-12-17 |
CN102017029A (en) | 2011-04-13 |
CN102017029B (en) | 2012-09-19 |
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