WO2003077267A1 - Ölfilteranlage - Google Patents
Ölfilteranlage Download PDFInfo
- Publication number
- WO2003077267A1 WO2003077267A1 PCT/EP2003/000636 EP0300636W WO03077267A1 WO 2003077267 A1 WO2003077267 A1 WO 2003077267A1 EP 0300636 W EP0300636 W EP 0300636W WO 03077267 A1 WO03077267 A1 WO 03077267A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- filter system
- oil filter
- flow
- volume flow
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 230000008859 change Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
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
-
- 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
Definitions
- the invention relates to an oil filter system for cleaning or cleaning and drying the oil in a tap changer on a power transformer or a plunger coil.
- Such a known oil filter system has a pump unit which contains a feed pump, a pump motor and a filter cartridge in a cylindrical vessel. Flange connections for oil flow and oil return are attached to the top and bottom covers of the boiler.
- the feed pump sucks in the switching oil via a suction line of the tap changer and a pipe for the flow.
- the oil enters the boiler of the pump unit at the bottom and is pushed by the feed pump through the filter cartridge.
- the oil cleaned by a paper filter cartridge or cleaned and dried by a combination filter cartridge leaves the boiler via a return connection and flows back through a pipe for the return to the tap changer, more precisely the tap changer head.
- a combination filter cartridge that is particularly suitable for such an oil filter system is already known from DE-PS 40 33 172.
- certain monitoring devices are available in the known oil filter system: First of all, a pressure switch is provided which is set to the maximum permissible working pressure and closes a signaling contact when this value is reached or exceeded, which, for example in a control room, reaches the set maximum value and thus signaling the need to replace the filter cartridges. Furthermore, a thermostat is usually provided to report this information of the pressure switch at a low oil temperature of, for. B. suppressed less than 20 degrees C. This avoids false reports with increased oil viscosity.
- a time control is provided which, after actuation of the motor drive of the respective step switch, puts the pump motor and thus the feed pump of the oil filter system into operation for a certain time. This is usually done using a time relay or a timer. Finally, a motor protection switch with thermal or magnetic overcurrent release is provided for the pump motor as a safety device.
- the known oil filter system has various disadvantages: Each time the feed pump is switched on, it runs at full capacity without taking the viscosity of the oil into account depending on the oil temperature. Since the feed pump must generate a sufficiently high oil flow even at low oil temperatures and therefore viscous oil, the pump motor and feed pump are oversized for normal operation. The result of this, in addition to possible cavitation in the feed pump, is an excessive oil flow in the suction line of the connected tap changer, which leads to a charge separation between the oil and the suction pipe in its diverter switch. Another disadvantage is that the respective condition of the filter cartridge, ie. H. the degree of their permeability to the oil.
- the object of the invention is therefore to present a generic oil filter system which does not have these disadvantages and which permits optimal oil filtering or oil filtering and drying with any - temperature-dependent - oil viscosity and also takes into account the respective condition of the filter cartridge within its permissible tolerance of permeability during operation ,
- the invention is based on the general idea of using a specific volume flow of the oil to be filtered, measured in l / s, as a criterion for the function of the oil filter system.
- This volume flow measurement is therefore used according to the invention for determining the filtered oil quantity, for determining the state of the filter cartridge and, as a result, for the state-dependent control of the oil filter system.
- Such a volume flow measurement according to the invention can preferably be carried out by a flow sensor with a defined cross section or also by means of a differential pressure measurement via an orifice arrangement.
- a particular advantage of the invention is that a changing flow resistance as a result of a changing oil viscosity is compensated for by a change in the delivery capacity of the delivery pump by means of a corresponding control part.
- Another advantage is that a flow resistance of this filter cartridge which increases in the course of the operating time of the filter cartridge can also be compensated for by increasing the delivery capacity of the feed pump.
- it is generally possible to keep the volume flow rate constant regardless of the influences described, in particular also during the entire service life of the filter cartridge. Furthermore, it is possible to judge when the filter cartridge needs to be replaced by evaluating the control signal accordingly.
- Another advantage of the invention is that by appropriately selecting or parameterizing the setpoint for the volume flow, the entire oil filter system can be easily connected to a wide variety of tap changers, which exist in numerous different designs and sizes with different oil volumes, pipe lengths and cross sections , can be adjusted.
- Fig. 1 shows an oil filter system according to the invention together with the connected tap changer in a schematic representation
- Fig. 2 shows a control circuit for explaining the process steps taking place in the oil filter system according to the invention.
- the oil filter system shown has a pump unit 1, in which, as is known from the prior art and not shown here, the feed pump, the pump motor driving it and the filter cartridge are located.
- the pump unit 1 is designed as a cylindrical pressure vessel, which is closed in a pressure-tight manner by an upper cover 2 and a lower cover 3.
- a return line 4 is connected to the upper cover 2, which has a shut-off valve 5 and leads to the tap changer head 6 of the connected tap changer 7. Through this return line 4, the filtered or filtered and dried oil is fed back into the oil container 8 of the tap changer 7.
- Another component of the oil circuit is a flow line 9, which in turn leads from the tap changer head 6 via an oil flow sensor 10 interposed according to the invention, a drain valve 11 and again a shut-off valve 12 through the lower cover 3 into the interior of the pressure vessel and thus into the pump unit; this closes the cooling circuit.
- the mode of operation is as follows: The pump motor sucks the oil in via a suction line of the tap changer 7 from its oil tank 8 via the feed line 9. The oil then passes through the oil flow sensor 10 arranged in the feed line 9. A volume flow measurement is carried out there.
- Suitable flow sensors for the oil flow sensor 10 are known and are commercially available. They work as electronic flow sensors based on the calorimetric principle and have no mechanically moving parts, so that they can be installed without taking into account the installation position and flow direction. Furthermore, the underlying calorimetric principle is characterized by its independence from the viscosity of the media. Electronic flow sensors based on the calorimetric principle use the physical effect that a flowing medium absorbs and transports thermal energy.
- Such a flow sensor is installed in the pipeline via a corresponding connection and is in contact with the flowing medium.
- the sensor is made of precious metal or plastic and contains two temperature-dependent resistors and a heat source.
- the heat source creates a local temperature increase in the medium, which is measured by one of the temperature-dependent resistors as a sensor.
- the second sensor detects changes in the medium temperature and is used to compensate for the measurement result.
- the temperature-compensated measured value is finally obtained from the difference in resistance between the two temperature sensors.
- Another known sensor contains four temperature-dependent resistors, with the flowing medium the first two resistors being cooled are cooled; the resulting detuning of a resistance bridge is a measure of the flow. By using such a resistance bridge, a direction-independent flow against the sensor is possible.
- Such flow sensors are offered under the type designation Sl 1004 by ifm electronic GmbH, DE. Very similar flow sensors are also available from Weber Sensors, US, Endress & Hauser, DE and Schmidt-Feintechnik, DE.
- the oil enters the pressure vessel from below through the cover 3 and is pushed through the filter insert by the feed pump.
- the cleaned oil then leaves the pressure vessel on the upper cover 2 and flows back via the return line 4 to the oil vessel 8 of the tap changer 7.
- the pump motor in the pump unit 1 has means for controlling its speed; A frequency converter is particularly suitable for this.
- the principle of speed control of three-phase asynchronous motors by frequency control is known to the person skilled in the art; if you want to regulate the speed of such a motor via the frequency, devices must be used that can convert the fixed mains voltage frequency into variable frequencies. This can be done by frequency converters that contain various electrical components, e.g. B. thyristors, transistors, IGBT's or MCT's. Such frequency converters can be used to generate frequencies larger or smaller than those of the mains voltage.
- a suitable frequency converter is manufactured by Siemens under the name "MICROMASTER”. Under the name COMBIMASTER®, the same manufacturer already offers a combination of a frequency converter and an asynchronous motor as a common assembly.
- the delivery rate of the delivery pump can also be varied.
- Known centrifugal pumps can be used in particular as feed pumps; other types of pumps known to the person skilled in the art can also be used.
- the oil flow sensor 10 arranged in the feed line 9 leading to the pump unit 1 detects the volume flow of the oil through the feed line 9 and in the manner explained above thus also through the oil vessel 8 of the diverter switch of the tap changer 7.
- the oil flow sensor 10 is electrically connected to a controller, not shown, in which the actually measured volume flow, ie the oil flow, is compared with a predetermined setpoint and, if there is a deviation, by means of the pump motor connected upstream Frequency converter whose speed and thus the delivery rate of the feed pump is varied accordingly.
- a change in the oil flow which is detected by the oil flow sensor 10 and leads to a change in the delivery capacity, can, as already explained above, have various causes.
- the viscosity of the oil can change due to changing temperature conditions, on the other hand, due to a filter insert that becomes increasingly clogged with filtered particles during operation, its flow resistance can become ever greater. Both causes are equally covered by the invention and lead to a change in the delivery rate, i. H. a regulation.
- the oil flow rate in the flow line 9 is kept at a constant, non-critical value.
- control signal generated in the controller is also possible to use the control signal generated in the controller as a result of the comparison of the setpoint and actual value of the flow velocity for monitoring the overall system with regard to the maximum and minimum values that have occurred. Due to the time-related storage of this signal, an upcoming change of the filter cartridge can also be planned in the long term as a trend statement.
- an additional H 2 0 sensor is arranged in the flow line.
- the moisture content of the oil can be determined by means of such an additional H 2 0 sensor, which is known to the person skilled in the art; by comparing the recorded moisture content with a predetermined limit value, it can be determined when combined filters, ie filter cartridges both for cleaning and drying, the zeolite insert causing the drying is saturated and for this reason - regardless of the condition of the other filter layers, by which the oil flow is influenced, the filter cartridge should be replaced.
- the controlled system which consists of the oil filter system according to the invention itself and the oil vessel 8 of the tap changer 7, which is connected to the latter. Pollution of the filter insert or a temperature-related change in the viscosity of the oil act as disturbance variable Z on this controlled system.
- the volume flow Vx of the oil is recorded as a controlled variable in a measuring device, here the oil flow sensor 10, and in a measurement signal x converted.
- This measurement signal x representing the actual value of the volume flow Vx, is compared in a controller with a corresponding setpoint w.
- a suitable controller can be constructed in a wide variety of ways; A "Tap Manager®" device from the applicant can be used particularly advantageously here.
- the controller generates a control variable u, specifically this is a variable control current for a frequency converter on the pump motor of the feed pump.
- This pump motor can thus change its speed; in As a result, the output of the feed pump varies and thus regulates the influence of the disturbance variable Z.
- the control circuit is thus closed.
- the predetermined setpoint w ie the desired oil flow rate
- different lengths and cross sections of the supply and return lines 9, 4, the oil volume in the respective oil container 8 of the step switch 7 or also certain specific types of oil can be taken into account
- the controller-generated control variable must be stored in a non-volatile memory over a longer period of time and from this, tendencies about the condition of the entire system in general and the respective filter insert and its expected replacement time in particular can be obtained.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filtration Of Liquid (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Feeding And Controlling Fuel (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-7013996A KR20040104492A (ko) | 2002-03-08 | 2003-01-23 | 오일 필터 시스템 |
EP03704451A EP1483767B1 (de) | 2002-03-08 | 2003-01-23 | Oelfilteranlage |
DE50311089T DE50311089D1 (de) | 2002-03-08 | 2003-01-23 | Oelfilteranlage |
US10/491,401 US7179369B2 (en) | 2002-03-08 | 2003-01-23 | Oil filter system |
JP2003575395A JP2005519484A (ja) | 2002-03-08 | 2003-01-23 | オイルフィルター設備 |
CA002468223A CA2468223A1 (en) | 2002-03-08 | 2003-01-23 | Oil filter system |
AU2003206767A AU2003206767A1 (en) | 2002-03-08 | 2003-01-23 | Oil filter system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10210396.8 | 2002-03-08 | ||
DE10210396A DE10210396C1 (de) | 2002-03-08 | 2002-03-08 | Ölfilteranlage |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003077267A1 true WO2003077267A1 (de) | 2003-09-18 |
Family
ID=7714055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/000636 WO2003077267A1 (de) | 2002-03-08 | 2003-01-23 | Ölfilteranlage |
Country Status (10)
Country | Link |
---|---|
US (1) | US7179369B2 (de) |
EP (1) | EP1483767B1 (de) |
JP (1) | JP2005519484A (de) |
KR (1) | KR20040104492A (de) |
CN (1) | CN1288676C (de) |
AT (1) | ATE421157T1 (de) |
AU (1) | AU2003206767A1 (de) |
CA (1) | CA2468223A1 (de) |
DE (2) | DE10210396C1 (de) |
WO (1) | WO2003077267A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2930726A1 (de) * | 2014-04-08 | 2015-10-14 | Siemens Aktiengesellschaft | Öltrocknungsanlage |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7713425B2 (en) * | 2005-05-11 | 2010-05-11 | Honeywell International Inc. | Oil management system |
CN1937116B (zh) * | 2005-09-21 | 2011-04-20 | 上海华明电力设备制造有限公司 | 有载分接开关的在线滤油装置 |
US8524010B2 (en) * | 2007-03-07 | 2013-09-03 | Ecoservices, Llc | Transportable integrated wash unit |
GB0708684D0 (en) * | 2007-05-04 | 2007-06-13 | Davies Jason | Stop tap and meter anti-tamper device |
CN102194564B (zh) * | 2010-03-09 | 2013-04-24 | 华北电力科学研究院有限责任公司 | 变压器器身干燥系统和方法 |
DE202010011160U1 (de) * | 2010-08-07 | 2010-12-16 | Mahle International Gmbh | Kombiniertes Pumpen- und Filtermodul |
CN102856044A (zh) * | 2012-08-13 | 2013-01-02 | 吴江市东泰电力特种开关有限公司 | 一种有载分接开关在线滤油装置 |
CN102937218A (zh) * | 2012-11-06 | 2013-02-20 | 郭镭 | 用于变压器有载分接开关的多功能放气法兰 |
DE102013107547B4 (de) * | 2013-07-16 | 2017-01-19 | Maschinenfabrik Reinhausen Gmbh | Laststufenschalter, Verfahren zur Montage eines Lastumschaltereinsatzes im Laststufenschalter und Kerosinablassschraube |
CN103366994A (zh) * | 2013-07-22 | 2013-10-23 | 国家电网公司 | 便携式电力变压器分接开关调整装置 |
CN103578845B (zh) * | 2013-10-22 | 2016-06-15 | 国网江苏省电力公司盐城供电公司 | 具有可拆卸式清洗装置的断路器 |
CN109741912B (zh) * | 2019-03-15 | 2020-01-03 | 河南工学院 | 变压器内部绝缘介质净化装置 |
CN110320059B (zh) * | 2019-06-21 | 2021-08-24 | 国网山西省电力公司电力科学研究院 | 变压器油泵长期运行评估方法及评估装置 |
CN113494489A (zh) * | 2021-06-28 | 2021-10-12 | 洛阳中重自动化工程有限责任公司 | 一种减速器润滑油流量自适应调整的润滑系统及方法 |
CN113451008B (zh) * | 2021-08-31 | 2021-11-05 | 江苏悦成变压器有限公司 | 一种基于冷却保护装置的油浸式变压器 |
CN116580935B (zh) * | 2023-04-29 | 2023-11-21 | 郑变科技有限公司 | 一种油浸式变压器油净化装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2257615A1 (de) * | 1972-11-24 | 1974-05-30 | Kurt Jaczak | Apparat zum trocknen und reinigen von transformatoren-oelen |
DE2948111A1 (de) * | 1979-11-29 | 1981-06-04 | Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg | Mit oelfilteranlage versehener stufentransformatoren |
EP0481239A1 (de) * | 1990-10-19 | 1992-04-22 | Maschinenfabrik Reinhausen Gmbh | Ölfilter, insbesondere für Stufenschalter von Stufentransformatoren |
US5691706A (en) * | 1995-03-08 | 1997-11-25 | Filmax, Inc. | Transformer leak alarm |
WO2000052445A1 (en) * | 1999-03-05 | 2000-09-08 | Velcon Filters, Inc. | Apparatus for removing water from dielectric oil in electrical power transformers |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4206420C2 (de) * | 1992-02-29 | 1994-10-06 | Epe Eppensteiner Gmbh & Co | Filter |
US6062821A (en) * | 1998-10-14 | 2000-05-16 | General Signal Corporation | Integral oil filter-pump system |
-
2002
- 2002-03-08 DE DE10210396A patent/DE10210396C1/de not_active Expired - Fee Related
-
2003
- 2003-01-23 AT AT03704451T patent/ATE421157T1/de not_active IP Right Cessation
- 2003-01-23 CA CA002468223A patent/CA2468223A1/en not_active Abandoned
- 2003-01-23 JP JP2003575395A patent/JP2005519484A/ja not_active Withdrawn
- 2003-01-23 KR KR10-2004-7013996A patent/KR20040104492A/ko not_active Application Discontinuation
- 2003-01-23 WO PCT/EP2003/000636 patent/WO2003077267A1/de active Application Filing
- 2003-01-23 EP EP03704451A patent/EP1483767B1/de not_active Expired - Lifetime
- 2003-01-23 CN CNB038050870A patent/CN1288676C/zh not_active Expired - Fee Related
- 2003-01-23 US US10/491,401 patent/US7179369B2/en not_active Expired - Fee Related
- 2003-01-23 AU AU2003206767A patent/AU2003206767A1/en not_active Abandoned
- 2003-01-23 DE DE50311089T patent/DE50311089D1/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2257615A1 (de) * | 1972-11-24 | 1974-05-30 | Kurt Jaczak | Apparat zum trocknen und reinigen von transformatoren-oelen |
DE2948111A1 (de) * | 1979-11-29 | 1981-06-04 | Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg | Mit oelfilteranlage versehener stufentransformatoren |
EP0481239A1 (de) * | 1990-10-19 | 1992-04-22 | Maschinenfabrik Reinhausen Gmbh | Ölfilter, insbesondere für Stufenschalter von Stufentransformatoren |
US5691706A (en) * | 1995-03-08 | 1997-11-25 | Filmax, Inc. | Transformer leak alarm |
WO2000052445A1 (en) * | 1999-03-05 | 2000-09-08 | Velcon Filters, Inc. | Apparatus for removing water from dielectric oil in electrical power transformers |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2930726A1 (de) * | 2014-04-08 | 2015-10-14 | Siemens Aktiengesellschaft | Öltrocknungsanlage |
Also Published As
Publication number | Publication date |
---|---|
EP1483767B1 (de) | 2009-01-14 |
CN1639814A (zh) | 2005-07-13 |
US20040238419A1 (en) | 2004-12-02 |
DE10210396C1 (de) | 2003-07-10 |
US7179369B2 (en) | 2007-02-20 |
CA2468223A1 (en) | 2003-09-18 |
DE50311089D1 (de) | 2009-03-05 |
CN1288676C (zh) | 2006-12-06 |
AU2003206767A1 (en) | 2003-09-22 |
JP2005519484A (ja) | 2005-06-30 |
KR20040104492A (ko) | 2004-12-10 |
ATE421157T1 (de) | 2009-01-15 |
EP1483767A1 (de) | 2004-12-08 |
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