EP3698148A1 - Stromwandler mit fluid- oder ölpapierisolierung für hochspannung - Google Patents
Stromwandler mit fluid- oder ölpapierisolierung für hochspannungInfo
- Publication number
- EP3698148A1 EP3698148A1 EP18788765.8A EP18788765A EP3698148A1 EP 3698148 A1 EP3698148 A1 EP 3698148A1 EP 18788765 A EP18788765 A EP 18788765A EP 3698148 A1 EP3698148 A1 EP 3698148A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductor
- primary
- primary conductor
- current transformer
- outer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/321—Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- 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 a current transformer (combi converter) with fluid or oil paper insulation for high voltage, with a head housing, which is crossed by a primary conductor, wherein in the head housing interspersed by the primary conductor measuring ⁇ device is arranged with a arranged in a protective measuring core.
- a current leading to high voltage level primary conductor is guided centrally through a to ⁇ rusförmige measuring device.
- the primary conductor can be made multi-stranded, often with four parallel strands.
- the strands are guided mechanically parallel through the torus-shaped Messein ⁇ direction.
- the strings can optionally be connected in series (with external feedback) or parallel connection. By connecting the strings in series, the current measuring range can be extended downwards, and by parallel switching the current measuring range upwards.
- high-voltage converters are usually insulated by means of fluid and / or oil-paper insulation. profiled.
- the invention is therefore based on the object to improve current transformers for high voltage systems to the extent that they are better adaptable with less effort.
- the solution according to the invention lies in the features of the inde- pendent claim ⁇ .
- Advantageous developments are the subject of the dependent claims.
- the primary conductor two different - Dene types comprises, as the first type an outer tube primary conductor and a second type one or more mecaniclei ⁇ ter primary conductor, the outer tube primary conductor enclosing an interior, which is designed to receive the inner conductor primary conductor, and the inner conductor Primary conductor can be inserted into the interior.
- the core of the invention is the idea to create a special primary conductor with the outer tube, which serves on the one hand for power transmission and on the other hand creates a sheath for the inner conductor.
- the invention has recognized that thus only The outer tube primary conductor must be sealed against the head housing, and therefore inner conductor can be easily inserted later or removed without a Befask- with sealing measures would be required.
- a special combination is created in which the outer tube functioning as a protective covering is at the same time the primary conductor.
- a subsequent change in the configuration and number of primary conductors is thus possible in a simple manner. Further, the number of seals is reduced to two (one each at the beginning and end of the outer tube primary conductor) versus two per strand (that was a total of eight seals in the frequent version with four conductor strands), which means not only a reduction in manufacturing cost, but also brings with it an increase in reliability.
- the invention has the advantage that the inner conductors have no direct contact with the head housing and are thus thermally better insulated, whereby the - unwanted - warming of the current transformer and in particular his ⁇ ner measuring device is minimized due to unavoidable current heat losses in the primary conductors ,
- a fluid is understood as meaning gas, for example sulfur hexafluoride SF6, or liquid, for example oil.
- the positioning of the inner conductor primary conductor is defined so that they can be easily inserted into the receiving pocket when needed. Further measures for a correct recording or positioning ⁇ tion of the inner conductor primary conductor are not required.
- spacers are provided for the receiving pockets. seen. This results automatically by the insertion of the inner conductor primary conductor and their correct positioning. It is particularly useful if the spacers are integrated into the receiving pocket, so that no additional components are needed. Retrofitting of the inventive ⁇ Shen current transformer with other inner conductor primary conductors is thus significantly simplified.
- the inner conductor primary conductors are designed air-insulated.
- the inner conductor primary conductors are distributed uniformly in the circumferential direction. This provides a maxi ⁇ painting distance between the primary conductors, which in the case of the series is currently favorable for occurring differences in potential between the inner conductor primary conductors. Furthermore, favorable courses for the field lines of the electric and magnetic fields result. Particularly expedient is an arrangement of three inner conductor primary conductor at vertices of a triangle, which is in particular rectangular and equal ⁇ schenklig.
- the outer tube primary conductor is preferably isolated on only one side guided in the head housing and screwed from the opposite ⁇ lying side via a contact base plate conductively connected to the head housing. Furthermore, it is expedient if the inner conductor or primary conductors are insulated from the outer pipe primary conductor. This makes it possible that potential differences between inner conductor and outer tube can exist. This can be used in particular for a series connection of the inner conductors, so as to expand the current measuring range.
- the interior is made uniform and free of partitions.
- the outer tube primary conductor is designed so that it has a pointing into the interior protuberance.
- This protuberance narrows the interior space in one place. It is precisely the place preferably at a (fictitious) rather additional inner conductor would be located (inner conductor same positio ⁇ discrimination of the protuberance).
- Figure 1 is a view of a current transformer with Isolatorfuß and head housing.
- Figure 2 is a schematic view of the arrangement of the inner conductor in the outer tube primary conductor (with current density).
- Fig. 5 is a schematic longitudinal sectional view of the head housing of a second embodiment.
- a current transformer for high voltage applications designated in its entirety by the reference numeral 1, is shown in a partially sectioned illustration in FIG.
- the Stromwand- 1er 1 has a transducer head 10 with a housing 11 which is angeord ⁇ net at the upper end of an elongated Isolatorfußes 12. On top of the transducer head 10 is a pot 17 angeord ⁇ net. With a flange 13 at the lower end of the Isolatorfußes 12, the current transformer 1 is fixedly mounted on a pad. In the interior of the insulator nose 12 is a secondary conductor is disposed ⁇ 20, the boxes of a measuring core 2 in the transducer head 10 be made ⁇ signals for a measured current to a connection 14 on the flange 13 performs.
- the transducer head 10 has a disk-like shape with a central passage opening 16. Through the passage opening 16, a primary conductor 3 is guided.
- the transducer head 10 Around the passage opening 16 around a toroidal measuring ⁇ device 2 is arranged in the transducer head 10. It is executed in two layers and comprises two measuring cores 21, 22, which are arranged kon ⁇ centered about the through hole sixteenth The measurement cores are - to also bebil ⁇ det to detect the guided through the primary conductor 3 current contact and to output a corresponding signal via arranged in Iso ⁇ latorfuß 12 signal conductor 20 - in a conventional manner.
- the current transformer shown in FIG. 1 is an oil-insulated current transformer.
- the invention may also be embodied on a current transformer isolated by means of protective gas. This is shown schematically in FIG.
- the transducer head 10 is provided with a gas insulation instead of the oil insulation. It can be seen that in this case the pot 17 ⁇ has a greater height ⁇ .
- connecting plates for the primary conductor are not shown in FIG. 5 as well as in FIG.
- the primary conductor 3 consists of an outer tube primary conductor 30 having an inner space 35, in which one or more inner conductor primary conductors 41, 42, 43 can be accommodated. Regardless of the type of insulating medium, the primary conductor 3 must be sealed. For this purpose, in each case a seal 39 is provided at the locations where the outer tube primary conductor 30 enters or exits the transducer head 10. The seal 39 surrounds the primary conductor 30 at its outer periphery, respectively.
- FIG. The arrangement of inner conductor primary conductor relative to the outer tube primary conductor is shown in FIG. It can be seen the outer tube primary conductor 30, in which an interior space is formed. The interior is provided for receiving three inner conductor primary conductors 41, 42, 43. They are designed as circular Stä ⁇ be and arranged in rounded receiving pockets 31, 32, 33 of the interior.
- the shape of the receiving ⁇ bags 31, 32, 33 is tuned to the inner conductor primary conductor 41, 42, 43, that is substantially uniform distances between the outer circumference of the inner conductor primary conductor 41, 42, 43 on the one hand and the edge of the interior 35 on the other hand he give ⁇ , wherein the distances between two adjacent mecaniclei ⁇ ter-primary conductors 41, 42 and 41, 43 are each twice as large as the distance between the inner conductor primary conductor 41, 42, 43 and the edge of the interior 35.
- a gleichffleßi ⁇ ge field distribution of the electromagnetic field is achieved.
- the inner conductor primary conductors are air-insulated from the outer pipe primary conductor 30 surrounding them.
- the inner conductor primary conductors 41, 42, 43 can be used seal-free in the interior 35 of the outer pipe primary conductor 30. Retrofitting with inner conductor primary conductor 41, 42, 43 is thus easy and in the field possible.
- the one ⁇ Zigen seals are provided on the outside of the outer tube-Primärlei ⁇ ter 30, and are already used in the factory. Since ⁇ with results in a robust and well-retrofittable Group consolidation ⁇ constructive tion.
- the three inner conductor primary conductors 41, 42, 43 are arranged in a triangular configuration in such a way that they form vertices of a right-angled isosceles triangle. Based on the cross section of the outer tube primary conductor 30, the triangle formed by the three inner conductor primary conductors 41, 42, 43 is arranged off-center. It remains so ⁇ with a space for a protuberance 34 of the Purerohr Primärlei ⁇ ters 30. This is arranged at the point at which - a re ⁇ gel Mer arrangement - a fourth inner conductor would be arranged.
- the protuberance 34 is such that its cross section is at least as large as one of the inner conductor primary conductors 41, 42, 43.
- the electric field caused by it occurs functionally in place of another inner conductor. The result is not only a favorable field distribution, but also a favorable current density distribution. This is indicated in Figure 2 by different levels of shades of gray ⁇ tion.
- inner conductor primary conductor in the common outer tube primary conductor 30 are shown in the figures. ren 3 to 5 shown. They each show a partial view of the transducer head, seen from the axis of the outer tube primary conductor 30. This has, as already explained above, an inner space 35 with three pocket-like recesses 31, 32, 33 (receiving pockets) for receiving inner conductor primary conductor. In Figure 3a, no inner conductor primary conductor is inserted. Thus, the entire interior 35 forms a free space. In contrast, in the illustration according to FIG. 3 b, an inner conductor primary conductor 41 is inserted into the free space 35 in a middle one of the receiving pockets 31.
- the spacers 37 may be designed as individual elements or as sleeve-like elements. They are expediently not arranged along the entire length of the inner conductor primary conductor 41, but preferably only in the region of the two ends thereof.
- FIG. 3c shows a representation in which two inner conductors of primary conductors 41, 42 are inserted. For clarity, no spacers are shown. It can be seen that the inner conductor primary conductor 42 is arranged in one of the two remaining pocket-like recesses of the inner space 35. An optionally existing third inner ⁇ conductor primary conductor 43 is shown in dashed lines.
- FIGS. 4a) to c Examples of a wiring of the outer pipe primary conductor 30 and the inner conductor primary conductors 41, 42, 43 arranged therein are shown in FIGS. 4a) to c).
- Figure 4a) the basic case is shown as in Figure 3a, after which single ⁇ Lich the outer tube primary conductor 30 is present.
- a connection plate 50 is provided, which is arranged in isolation on a front side of the transducer head 10.
- the terminal ⁇ plate 50 contacts the outer tube primary conductor 30 via a connecting rail 60. This is connected by means of screw ei ⁇ neterrorism with the connection plate 50 and on the other hand with the outer tube primary conductor 30.
- a mounting surface 38 for receiving the screw of the An ⁇ closing rail 60 is formed on the outer tube primary conductor 30 in the region of the protuberance 34.
- the wiring of the outer tube is advantageously carried out in such a way that the outer tube 30 is connected via the connecting rail 60 with the connection plate 50.
- the outer tube 30 is then the first conductor.
- This iso ⁇ liert introduced into the housing 11 on the input side and screwed on the termelie ⁇ ing side via the contact base plate 53 conductively connected to the housing.
- the housing 11 is then the first return conductor. More return conductor Kunststofftechniksbügel 51 and 52 so as ⁇ associated connector plates are isolated on the con tact base plate ⁇ mounted.
- they can be interconnected via the connecting rails 61, 62, 63.
- Primärlei ⁇ ter can be inserted, as a inner conductor primary conductor can be inserted into the interior 35 of the outer tube-primary conductor 30 41, 42, 43, , These are shown in FIGS. 4b) and c).
- Primärlei ⁇ ter 41, 42, 43 additionally recognizes a contact base plate 53 so ⁇ asmaschinetechnischsbügel 51, 52. The latter are designed so that they rotate around the outside of the transducer head 10 so as to the front and back together connect to.
- FIG. 5 A schematic sectional illustration is shown in FIG. 5. As already mentioned, this is an embodiment with a protective gas-insulated transducer head 7.
- the interior of the transducer head 10 ⁇ with the toroidal measuring device 2 is isolated by oil paper or gas, in particular sulfur hexafluoride SF6.
- Inner conductor primary conductors are not present in this figure; if required, they can be plugged into the interior of the outer tube primary conductor 30, without requiring additional seals according to the invention, since their sealing is taken over centrally by the outer tube primary conductor 30.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17197302.7A EP3474024A1 (de) | 2017-10-19 | 2017-10-19 | Stromwandler mit fluid- oder ölpapierisolierung für hochspannung |
PCT/EP2018/078683 WO2019077096A1 (de) | 2017-10-19 | 2018-10-19 | Stromwandler mit fluid- oder ölpapierisolierung für hochspannung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3698148A1 true EP3698148A1 (de) | 2020-08-26 |
Family
ID=60153134
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17197302.7A Withdrawn EP3474024A1 (de) | 2017-10-19 | 2017-10-19 | Stromwandler mit fluid- oder ölpapierisolierung für hochspannung |
EP18788765.8A Withdrawn EP3698148A1 (de) | 2017-10-19 | 2018-10-19 | Stromwandler mit fluid- oder ölpapierisolierung für hochspannung |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17197302.7A Withdrawn EP3474024A1 (de) | 2017-10-19 | 2017-10-19 | Stromwandler mit fluid- oder ölpapierisolierung für hochspannung |
Country Status (4)
Country | Link |
---|---|
US (1) | US11735356B2 (de) |
EP (2) | EP3474024A1 (de) |
CA (1) | CA3081861A1 (de) |
WO (1) | WO2019077096A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3474024A1 (de) | 2017-10-19 | 2019-04-24 | RITZ Instrument Transformers GmbH | Stromwandler mit fluid- oder ölpapierisolierung für hochspannung |
DE102019214368B4 (de) * | 2019-09-20 | 2023-02-02 | Siemens Energy Global GmbH & Co. KG | Messwandleranordnung mit einem Spannungswandler und einem Stromwandler |
WO2021058089A1 (en) * | 2019-09-24 | 2021-04-01 | Siemens Energy Global GmbH & Co. KG | Signal transmission in instrument transformers |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS599529U (ja) * | 1982-07-10 | 1984-01-21 | ミドリ安全工業株式会社 | 分割型零相変流器等のホルダ− |
BR8700893A (pt) * | 1986-03-13 | 1987-12-22 | Messwandler Bau Ag | Transformador combinado de alta tensao e de corrente de alta tensao |
US4868533A (en) * | 1988-02-16 | 1989-09-19 | Ltv Aerospace & Defense Company | Transformer with a one-piece primary winding and housing |
DE10013143C2 (de) * | 2000-03-17 | 2002-06-27 | Aeg Niederspannungstech Gmbh | Messwandler |
US7119648B1 (en) * | 2003-04-03 | 2006-10-10 | Edward Herbert | Coaxial push pull transformers for power converters and like circuits |
US8269592B1 (en) * | 2010-05-05 | 2012-09-18 | Lockheed Martin Corporation | Pulse transformer |
CN202076117U (zh) * | 2011-03-14 | 2011-12-14 | 北京四方继保自动化股份有限公司 | 具有辅助小屏的干式电流互感器 |
EP2592636A3 (de) * | 2011-11-10 | 2013-10-23 | Atreus Enterprises Limited | Stromwandler |
CN103117161A (zh) * | 2011-11-17 | 2013-05-22 | 上海Mwb互感器有限公司 | 电流互感器的导电组件及其电流互感器 |
KR101216752B1 (ko) * | 2011-12-09 | 2012-12-28 | 숭실대학교산학협력단 | 동축권선 변압기를 이용하는 플라이백 컨버터 |
KR101218450B1 (ko) * | 2012-01-30 | 2013-01-04 | 숭실대학교산학협력단 | 동축권선 변압기를 이용한 전력 추정 장치 |
EP2955730B1 (de) * | 2014-06-10 | 2016-08-17 | ABB Technology Ltd | Stromtransformator |
CN106710857B (zh) * | 2015-07-31 | 2018-12-11 | 西门子公司 | 具有多匝导电杆的电流互感器 |
US10102962B1 (en) * | 2015-09-22 | 2018-10-16 | Apple Inc. | Integrated magnetic passive devices using magnetic film |
EP3208816A1 (de) * | 2016-02-17 | 2017-08-23 | General Electric Technology GmbH | Stromwandler mit sekundären transformationskomponenten in seiner basis |
EP3239997A1 (de) * | 2016-04-25 | 2017-11-01 | ABB Schweiz AG | Hv-vorrichtung und verfahren zur herstellung solch einer vorrichtung |
CN107294030B (zh) * | 2017-07-25 | 2022-10-14 | 广东吉熙安电缆附件有限公司 | 一种管母线连接结构 |
EP3474024A1 (de) | 2017-10-19 | 2019-04-24 | RITZ Instrument Transformers GmbH | Stromwandler mit fluid- oder ölpapierisolierung für hochspannung |
-
2017
- 2017-10-19 EP EP17197302.7A patent/EP3474024A1/de not_active Withdrawn
-
2018
- 2018-10-19 WO PCT/EP2018/078683 patent/WO2019077096A1/de unknown
- 2018-10-19 US US16/757,346 patent/US11735356B2/en active Active
- 2018-10-19 CA CA3081861A patent/CA3081861A1/en active Pending
- 2018-10-19 EP EP18788765.8A patent/EP3698148A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CA3081861A1 (en) | 2019-04-25 |
WO2019077096A1 (de) | 2019-04-25 |
US20210193375A1 (en) | 2021-06-24 |
EP3474024A1 (de) | 2019-04-24 |
US11735356B2 (en) | 2023-08-22 |
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