EP0521125A1 - Transformateur de courant place sous haute tension - Google Patents

Transformateur de courant place sous haute tension

Info

Publication number
EP0521125A1
EP0521125A1 EP19920903308 EP92903308A EP0521125A1 EP 0521125 A1 EP0521125 A1 EP 0521125A1 EP 19920903308 EP19920903308 EP 19920903308 EP 92903308 A EP92903308 A EP 92903308A EP 0521125 A1 EP0521125 A1 EP 0521125A1
Authority
EP
European Patent Office
Prior art keywords
conductor
voltage
transducer according
potential
signals
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Withdrawn
Application number
EP19920903308
Other languages
German (de)
English (en)
Inventor
Adolf Schwab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0521125A1 publication Critical patent/EP0521125A1/fr
Withdrawn legal-status Critical Current

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
    • G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
    • 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
    • G01R15/142—Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
    • 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
    • G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices

Definitions

  • the invention relates to a current transformer located at high voltage potential according to the preamble of claim 1.
  • a measuring transmitter for high-voltage lines has become known, which has operating potential, ie. H. Has high-voltage potential, located transducer for electrical quantities of the high-voltage line.
  • the output signals of the transducers are fed to a conversion digitizing part, which is at operating potential, and are transmitted as digital signals, for example by a transmitter, to ground potential. How the transducer is designed is not apparent from DE-OS 25 46 694.
  • a current transformer of the type mentioned has become known, the transducer of which is in the form of a Rogowski coil.
  • the Rogowski coil is wrapped around the outer circumference of the electrical conductor.
  • the electrical signals recorded in the process are fed to a measuring unit located within the inner conductor, from which the evaluated signals are conducted outwards via an data line in the form of a glass fiber line through an isolator.
  • the power supply for the measuring unit takes place via a further glass fiber line, which is led from earth potential through the insulator to high voltage potential.
  • This configuration is relatively complicated, in particular because of the special power supply for the Meßwertauf participants.
  • Another version of current transformers are inductive transducers, see e.g. B. CH-PS 514 923, which have one or more ring cores in the area of the outer casing, which surround the conductor concentrically. These current transformers are technically complex to manufacture.
  • the object of the invention is to provide a current transformer of the type mentioned, which is easy to manufacture and has a high measurement accuracy.
  • the measuring device is located within the outer contour within a recess of the inner conductor which is at high voltage potential;
  • Light signals generated by the measuring unit are guided according to claim 2 as a light beam or via light guides - specifically according to claim 3 - in a metal-encapsulated high-voltage switchgear assembly through the post insulator to ground potential. If the light signal via a light beam in a metal-encapsulated high-voltage system to earth potential, then radial bores are provided in the inner conductor and in the outer conductor, which are permeable to the light beam. That at least the reconsiderlei ter must be seen with a transparent seal in the radial bore ver goes without saying. It is also obvious that the radial bores must continue to be aligned with one another.
  • DE-OS 37 12 190 discloses a measuring arrangement located at high voltage potential, the measuring signals of which are transmitted as light signals to earth potential. What is important, however, is that the energy supply, on the one hand, and the way in which the measurement signals converted into light signals are carried out differently.
  • the embodiment according to the invention makes it possible to form a current converter unit which can be retrofitted in existing systems. Due to the fact that the cylinder covering the coil has an outer diameter that is equal to the outer diameter of the inner conductor, the dielectric breakdown strength does not change in the case of metal-encapsulated high-voltage systems between the inner conductor in the region of the coil and the outer conductor.
  • the light guides according to claim 3 will preferably be laid out in a spiral or meandering shape inside the support insulator. This results in a favorable arrangement with regard to the creepage distances along the light guides.
  • the known insulator is not a disk-shaped support insulator located within a gas-insulated, metal-encapsulated system, but rather one Porcelain insulator with plates to extend the creepage distances.
  • the light guides are on the outer surface and they run helically, but not spiral.
  • a capacitor arrangement can also be provided within the outer surface of the conductor for the voltage supply of the transmission circuit arrangement, which is formed in that the conductor has a circumferential depression in which the Well an electrode is arranged isolated.
  • the outside diameter of the electrode corresponds to the outside diameter of the conductor.
  • the transducer current consumed is an analog signal per se, and accordingly the transmission circuit arrangement is expediently designed as an analog / digital converter with a light transmitter which converts the analog measurement signal into a digital light signal which is used directly as a light beam or by means of the light guide to an evaluation unit located at earth potential or outside the encapsulation.
  • the measured values can additionally be transmitted in analog form with a further light beam path or light guide path into the outside space to the evaluation unit in order to be able to record the phase angle precisely.
  • the transmission circuit arrangement is at a high potential within the current-carrying inner conductor.
  • the temperature of the inner conductor can reach temperatures above 80 ° C. Temperature increases of up to 130 ° C. cannot be ruled out. However, the reliable functioning of the transmission circuit arrangement and the associated optoelectronics is only guaranteed up to limit values of the operating temperature; the limit values are 75 ° C, in special cases also 125 ° C. According to the features of claim 8, a Pelier element can be used for cooling, the basic principle of which is generally known and is described, for example, in Meyers Lexicon of Technology and the Exact Natural Sciences, Volume 3, Bibliographical Institute, Mannheim / Vienna / Zurich, 1970 is explained.
  • FIG. 1 shows a schematic representation of a current transformer within a high-voltage switchgear assembly, with light guides,
  • Figure 2 shows the current transformer of Figure 1 with direct light
  • FIG. 3 shows a current transformer according to FIG. 1 with cooling.
  • a metal-encapsulated, gas-insulated high-voltage circuit as shown in FIG. 1, has an outer encapsulation 10 located at earth potential, in which a hollow, high-voltage potential-carrying inner conductor 11 is arranged concentrically.
  • the outer encapsulation 10 is composed of two encapsulation parts 12, 1, at the ends of which a flange 14 or 15 is provided, between which a disk-shaped support insulator 16 is clamped for the inner conductor 11.
  • a flange 14 or 15 is provided, between which a disk-shaped support insulator 16 is clamped for the inner conductor 11.
  • a disk-shaped support insulator 16 is clamped for the inner conductor 11.
  • an internal conductor 11 it is of course also possible to provide one of the number of phases corresponding to the number of inner conductors in the case of multi-phase-enclosed switchgear.
  • a circumferential depression 4 is introduced within the inner conductor 11 and is covered by a cover cylinder 42 projecting from an edge 41 of the depression toward the outer surface except for a gap 43.
  • a coil 45 which is designed, for example, as a Rogowski coil and whose measurement signals are fed via conductors 46, 47 to a circuit arrangement 25 which is arranged in the interior of the inner conductor 11.
  • the analog measurement signals led through the conductors 23 and 24 to the circuit arrangement 25 are converted into digital signals.
  • the circuit arrangement 25 is an analog / digital converter.
  • a light transmitter 26 is located on the analog / digital converter 25; Analog-digital converter and light transmitter together form the transmission circuit arrangement, the light transmitter, after conversion into light signals, transmits the digital signals to a light guide arrangement or light guide 27 which, as shown schematically in the figure, spirally or meandering through the post insulator 16 to the outside.
  • the individual cross sections of the light guide arrangement 27 can be seen in the figure.
  • the light guide arrangement 27 is connected to an evaluation circuit 28 in which the light signals are evaluated.
  • the inner conductor 11 has a circumferential further depression 30, on the bottom of which insulating webs 31 and 32 are arranged, by means of which an electrode 33 is supported in an insulated manner with respect to the inner conductor 11.
  • a capacitor or capacitance 34 is thus formed between the electrode 33 and the bottom of the depression 30; with the located between the electrode 33 and the metal enclosure 12, the capacitor capacity of 35 '34 forms a capacitive voltage divider.
  • the converter 25 is supplied with voltage by means of this capacitor arrangement 34/35 via conductor 36/37.
  • An additional light guide is not shown, which is assigned to the inductive transducer 45 and which in analog form of the evaluation circuit generates the signals generated by the transducer. tion feeds. These additional light guide arrangements would also be passed through the post insulator 26 in a spiral or meandering fashion; With these analog signals which are in the same phase with the variable to be measured, the phase angle can be detected precisely.
  • the invention can be used in gas- or liquid-insulated high-voltage switchgear and overall it has a comparatively small space requirement and can also be produced with little effort. In a modified form, it can also be used with open-air systems.
  • Figure 1 shows only a single conductor within the metal encapsulation; the high-voltage system can of course also be a multi-phase encapsulated system. Then the electrode 33 can only be formed over a part of the circumference, so that the voltage supply for each individual inner conductor takes place separately.
  • the same dielectric as in the outer encapsulation 10 is located in the interior of the transducer or the supply capacitance, so that the measurement signals are temperature-dependent to a first approximation.
  • the cylinder 42 ends at a distance from the next edge of the depression 40, as a result of which the gap 43 is formed. This is very important in order to avoid magnetic shielding of the coil in the event of short-circuit currents.
  • the cylinder 42 serves only as a shield for the coil 45, insofar as measurement errors caused by capacitive interference are avoided.
  • the coil 45 is expediently designed as a Rogowski coil.
  • the measurement signals can also be transmitted to earth potential via a direct light beam.
  • the inner conductor 11 and the outer conductor 10 each have a radial bore 50 and 51, the radial bore 51 of the outer conductor 10 being closed with a window 52 made of a suitable transparent material.
  • the evaluation unit 28 is then assigned to the window 52 in such a way that scattered light cannot impair the reception of the evaluation unit, see FIG. 2.
  • Peltier element 61 On a shoulder 60 inside the inner conductor 11 a Pel ⁇ tier element, which is designated in its entirety with 61, is placed.
  • the Peltier element 61 has conductor materials of different electrical conductivity, as is known, for example, from Meyers Lexicon of Technology and the Exact Natural Sciences, volume 3, page 1916, so that the composition need not be discussed in more detail here.
  • the transmission circuit arrangements are or are thermally contacted with the cold surface of the Pelier element 61.
  • the Peltier element 61 is supplied with current by means of a suitably dimensioned current transformer 62 surrounding the inner conductor 11 via lines 63 and 64, so that a sufficient cooling effect can be achieved for the transmission circuit arrangement 25/26.
  • the power supply 29 could also be used. It goes without saying that a rectifier must be provided and is not shown in more detail in FIG. 3.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Un transformateur de mesure placé sous haute tension, en particulier pour un interrupteur haute tension à enveloppe métallique et isolé avec un gaz, produit des signaux de mesure qui sont guidés du potentiel haute tension au potentiel de terre, ce transformateur de mesure se trouvant à l'intérieur de la partie externe du conducteur (11) placé sous un potentiel élevé. A l'intérieur du conducteur creux (11), il est prévu un circuit de transformation (25, 26) qui transforme les signaux électriques de mesure en signaux lumineux, ces signaux lumineux étant guidés par des fibres optiques (27) vers le potentiel de terre. Pour refroidir le circuit de transformat (25, 26), il est prévu un élément Peltier (61) sur lequel est disposé ce circuit de transformation (25, 26). L'élément Peltier (61) est alimenté en courant électrique au moyen d'un transformateur de courant (62) de dimension appropriée.
EP19920903308 1991-01-23 1992-01-21 Transformateur de courant place sous haute tension Withdrawn EP0521125A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4101858 1991-01-23
DE19914101858 DE4101858C1 (fr) 1991-01-23 1991-01-23

Publications (1)

Publication Number Publication Date
EP0521125A1 true EP0521125A1 (fr) 1993-01-07

Family

ID=6423519

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19920905577 Withdrawn EP0521146A1 (fr) 1991-01-23 1992-01-21 Transformateur de mesure se trouvant a un potentiel de haute tenssion
EP19920903308 Withdrawn EP0521125A1 (fr) 1991-01-23 1992-01-21 Transformateur de courant place sous haute tension

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19920905577 Withdrawn EP0521146A1 (fr) 1991-01-23 1992-01-21 Transformateur de mesure se trouvant a un potentiel de haute tenssion

Country Status (4)

Country Link
EP (2) EP0521146A1 (fr)
JP (2) JPH05508021A (fr)
DE (3) DE4133508C1 (fr)
WO (2) WO1992013278A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4429959A1 (de) * 1994-08-24 1996-02-29 Abb Management Ag Stromwandler für eine metallgekapselte gasisolierte Hochspannungsanlage
DE19543363C2 (de) * 1995-11-21 1999-12-23 Ritz Messwandler Kg Meßwandleranordnung
EP0878041B1 (fr) 1996-01-31 1999-10-27 Siemens Aktiengesellschaft Dispositif blinde
DE19614447A1 (de) * 1996-04-12 1997-10-16 Aeg Sensorsysteme Gmbh Anordnung zur Erfassung der von mehreren Lichtbogensensoren erzeugten Signale
DE19713916B4 (de) * 1997-04-04 2014-08-28 Abb Schweiz Ag Kapazitiver Spannungswandler für eine metallgekapselte, gasisolierte Hochspannungsanlage
DE19912410A1 (de) * 1999-03-19 2000-10-12 Reinhausen Maschf Scheubeck Meßverfahren für eine Hochspannungsdurchführung und geeignete Meßanordnung
DE10022316A1 (de) * 2000-05-09 2001-11-22 Siemens Metering Ag Zug Magnetkreisanordnung zur Bestimmung eines elektrischen Stroms
JP2002152924A (ja) 2000-11-08 2002-05-24 Toshiba Corp 複合型ガス絶縁開閉装置用変流器
WO2020097933A1 (fr) * 2018-11-16 2020-05-22 Abb Schweiz Ag Capteur de tension et appareil

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE702081C (de) * 1936-02-19 1941-01-30 Lorenz Akt Ges C Hochfrequenzstromwandler
CH514923A (de) * 1970-04-17 1971-10-31 Bbc Brown Boveri & Cie Ringkernstromwandler an einer metallgekapselten druckgasisolierten Hochspannungsschaltanlage
DE2341073B2 (de) * 1973-08-10 1980-01-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Meßeinrichtung für die Spannung in einer gekapselten Hochspannungsschaltanlage
DE2363931C3 (de) * 1973-12-20 1979-08-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Strommeßeinrichtung
DE2501405A1 (de) * 1974-01-17 1975-07-24 Atomic Energy Commission Stromwandler
DE2409595B2 (de) * 1974-02-25 1978-06-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Spannungswandler für eine vollisolierte, metallgekapselte Hochspannungsschaltanlage
DE2428906A1 (de) * 1974-06-14 1976-01-02 Siemens Ag Messeinrichtung fuer stroeme in einem hochspannungsleiter
YU39528B (en) * 1974-10-21 1984-12-31 M Silvin Leskovar Measuring-transmitting device high-tension lines
CA1065016A (fr) * 1978-10-31 1979-10-23 Robert H. Rehder Detecteur de parametres electriques a l'interieur de conducteurs
JPS58124960A (ja) * 1982-01-21 1983-07-25 Mitsubishi Electric Corp 電流測定装置
DE3207306C2 (de) * 1982-03-01 1984-05-30 Siemens AG, 1000 Berlin und 8000 München Isolator mit Lichtleiter
DE3532524A1 (de) * 1985-08-23 1987-02-26 Bbc Brown Boveri & Cie Vorrichtung zur messung des transienten potentials der kapselung einer metallgekapselten, gasisolierten hochspannungsanlage
EP0262430A1 (fr) * 1986-09-29 1988-04-06 BBC Brown Boveri AG Dispositif à transformateur de courant pour installations de haute tension en plein air
DE3707306A1 (de) * 1987-03-06 1988-09-15 Walter Grickschat Verfahren und vorrichtung zur herstellung keramischer inlays
DE3712190A1 (de) * 1987-04-10 1988-10-27 Bbc Brown Boveri & Cie Elektrischer wandler

Non-Patent Citations (1)

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Title
See references of WO9213279A1 *

Also Published As

Publication number Publication date
DE4101858C1 (fr) 1992-05-14
DE4133508C1 (en) 1992-06-17
JPH05508223A (ja) 1993-11-18
DE4201434A1 (de) 1993-07-22
WO1992013279A1 (fr) 1992-08-06
WO1992013278A1 (fr) 1992-08-06
EP0521146A1 (fr) 1993-01-07
JPH05508021A (ja) 1993-11-11

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