EP0878039A1 - Conducteur tubulaire blinde - Google Patents

Conducteur tubulaire blinde

Info

Publication number
EP0878039A1
EP0878039A1 EP97904993A EP97904993A EP0878039A1 EP 0878039 A1 EP0878039 A1 EP 0878039A1 EP 97904993 A EP97904993 A EP 97904993A EP 97904993 A EP97904993 A EP 97904993A EP 0878039 A1 EP0878039 A1 EP 0878039A1
Authority
EP
European Patent Office
Prior art keywords
encapsulation
interior
encapsulated
information
transmission
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.)
Ceased
Application number
EP97904993A
Other languages
German (de)
English (en)
Inventor
Peter Bauerschmidt
Ottmar Beierl
Wolf-Eckhart Bulst
Valentin Magori
Thomas Ostertag
Leonhard Reindl
Gerd Scholl
Oliver Sczesny
Dieter Lorenz
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0878039A1 publication Critical patent/EP0878039A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication

Definitions

  • the invention relates to an encapsulated pipeline for electrical energy.
  • a metal-encapsulated high-voltage switchgear assembly is known from German utility model 94 20 199, in which a surface acoustic wave element (SAW) is arranged in one of its gas spaces.
  • SAW surface acoustic wave element
  • An antenna is arranged on the outside of the encapsulation, which serves for wireless information transmission with an evaluation device.
  • DE 195 14 342 C1 describes the use of SAW sensors in a high-voltage cable.
  • the invention is based on the object of specifying a simple solution for an information transmission in an encapsulated pipeline for electrical energy, wherein, if possible, no additional transmission lines are to be used.
  • the solution is achieved with an encapsulated pipe conductor which has at least two antenna elements directed towards the interior of its encapsulation, between which a wireless information transmission takes place, with each antenna element being assigned a transceiver device arranged outside the encapsulation.
  • the pipe conductor itself serves as a transmission conductor, and there is no galvanic coupling to the pipe conductor itself.
  • the information can be transmitted by means of acoustic, optical or, preferably, electromagnetic waves. This allows any choice of the technology used, which is based in each case on the respective conditions of the pipeline.
  • the interior can be divided into several subspaces, the antenna elements being arranged on different subspaces. In this way, information transmission is possible even over long distances.
  • a signal amplifier can be provided to amplify a signal level over long distances in a subspace between the antenna elements. For this purpose, this can have two antennas, which are preferably separated from one another by at least one partition or bulkhead.
  • the antenna elements are each arranged at an assigned opening on the encapsulation. This provides simple accommodation which is suitable for existing and new systems.
  • the antenna elements can optionally be arranged advantageously inside or outside the interior of the encapsulation.
  • At least one sensor can be arranged in the interior, which can be remotely queried from at least one of the antenna elements.
  • the pipeline has a favorable combination of information transmission and monitoring.
  • At least one of the transceivers can have an interface for coupling a secondary or higher-level monitoring device. A comprehensive exchange of information with a wide variety of systems is thus possible.
  • the encapsulation is preferably metallic, which provides good shielding. At least one switching device or a conductor for high or medium voltage can be arranged in the encapsulation. This enables integration into extensive piping systems, e.g. a switchgear, possible.
  • the sensors are preferably designed as surface wave sensors, which provides space-saving accommodation in the pipeline.
  • an encapsulated system for electrical energy is provided with a plurality of sensors arranged with its antenna elements in the interior of the encapsulation, a monitoring device having an antenna element for exchanging information with the sensors being provided, the antenna element of the monitoring device being arranged on the encapsulation and is directed towards the interior, and wherein the sensors can be queried selectively.
  • This solution allows simple monitoring of many functions by means of remote interrogation without any wiring or mechanical effort being involved in the encapsulation. Only the desired sensors need to be installed. This solution is also suitable for existing systems and can be easily expanded, and it is possible to accommodate the sensors in the encapsulation of the system even under unfavorable space conditions.
  • the sensors are preferred as surface wave sensors
  • the sensors can have the size of a check card, the major part of this form advantageously serving as an antenna element.
  • the sensors can be designed, at least in part, for recording different measured variables, as a result of which a large number of different information and / or measured values can be recorded.
  • the sensors can be arranged in different subspaces, in particular gas spaces, of the system. Of course, this only applies insofar as an information transfer between two subspaces is possible due to their partitioning.
  • the sensors can be designed as active or preferably as passive components.
  • the respective conditions at the respective installation site can thus be taken into account.
  • a passive version has the advantage that no electronics have to be used. This is favorable for use at high voltage potential.
  • the sensors can advantageously be arranged at the potential of the encapsulation or at the potential of a conductor in the encapsulation. As a result, there is no restriction to specific detection values, potential relationships or installation locations.
  • the installation location can even be mobile (e.g. on a shift rod). Additional potential separators are not necessary.
  • the monitoring device advantageously has at least one additional interface for the exchange of information with further sensors, SAWs, sensors or detection devices.
  • the further interface or interfaces can be designed as a line-bound interface / s, in particular an electrical, acoustic or optical interface / s, or as a wireless interface, whereby a variety of information sources can be coupled.
  • an interface for coupling a secondary or higher-level monitoring device.
  • the interface can then preferably be designed as a bus interface, as a result of which a high data transmission rate is possible.
  • Coding is preferably provided for the selective interrogation. In this way, a distinction is made between the respective information and assignment to the respective sources or sensors.
  • the coding can be done by hardware or by a procedural measure, e.g. Software to be implemented.
  • Each sensor thus has its own information path or channel.
  • the coding can alternatively or additionally be carried out in connection with a frequency or time division multiplex method. This enables an inexpensive, multiple use of existing frequency channels.
  • the coding can be carried out by polarization, for example the electromagnetic wave used, optionally with an orientable antenna, or correlation.
  • This type of coding is favorable for use in metal encapsulations.
  • Correlation methods are known in principle from radar technology, with a response signal from the sensor being used to send back a signal pattern which in the monitoring device is transmitted by a signal. Comparison method, for example a correlation method, is recognized.
  • the coding can also be done by an identifier in the transmission or response signal when exchanging information. In any case, this ensures selective recognizability in the transmitting and receiving device.
  • the encapsulation can be metallic, with a preferred use of the system for high or medium voltage.
  • the information gathered there can thus be processed safely and easily.
  • this provides shielding inwards and outwards.
  • At least one switching device or a conductor is then arranged within the encapsulation.
  • the system is then designed as a switchgear or pipeline.
  • the antenna elements can optionally be designed for the transmission of optical, acoustic or electromagnetic waves, with the greatest possible depending on the application
  • Transfer rate an optimized solution with regard to high transmission security and low sensitivity to interference is possible.
  • the present solution is particularly simple and can be easily integrated into new and existing systems.
  • the antenna elements are attached without complex measures.
  • the term “encapsulated system” is understood to mean generally system parts of the electrical energy distribution, in particular for high or medium voltage, which have an encapsulation, a housing or a boiler, in which at least one electrical component is accommodated. Examples of this are: an encapsulated disconnector or circuit breaker, an encapsulated switchgear, an SF6-insulated transformer or an SF6 pipe.
  • FIG. 1 shows a first switchgear with SAWs in a longitudinal section
  • FIG. 2 shows a second switchgear assembly with further SAWs outside its encapsulation
  • FIG. 3 shows a third switchgear assembly with an optical information transmission
  • FIG. 4 shows a pipeline with a device for information transmission.
  • a switchgear assembly with a monitoring device is generally explained, information transmission with radio frequency being used. It goes without saying that the monitoring device described can also be used for other functions within the switchgear, e.g. can be used for detecting a switching position without sensors according to a radar principle, for additional control tasks or purely for information transmission.
  • Switchgear 1 shows an encapsulated, gas-insulated switchgear assembly 1, as is known, for example, from the prior art according to the above-mentioned German utility model 94 20 199.
  • Switchgear 1 is suitable for high, high or medium voltage.
  • Switchgear is also understood to mean an encapsulated pipeline without a switching element.
  • a bus bar 6 runs centrally in the encapsulation 5 as an electrical conductor.
  • SAW Surface wave sensors
  • SAW 7a for temperature detection
  • SAW 7b for current detection
  • SAW 7c for gas detection
  • SAW 7d for position detection
  • Each SAW has at least one antenna 9 for transmitting information, in particular for interrogation, as the receiving and transmitting means.
  • the information is transmitted from the SAWs 7a to 7d to a central transmitting and receiving antenna which is effective for all SAWs 7a to 7d and is referred to below as antenna element 11.
  • Antenna, transmitting and receiving antenna, antenna element or receiving and transmitting means are understood here to mean any radiation and receiving elements that allow radiation and / or reception of electromagnetic or optical waves, for example radio antennas, ultrasound or optical transmitting and Receiving elements (eg infrared elements), whereby a division in the sending and receiving direction can also be included.
  • radio antennas for example radio antennas, ultrasound or optical transmitting and Receiving elements (eg infrared elements), whereby a division in the sending and receiving direction can also be included.
  • the embodiment according to FIG. 1 relates, for example, to radio information transmission.
  • the antenna element 11 is connected to a control and monitoring device via suitable lines 13, for example a coaxial cable, optionally with the interposition of a matching element. direction (hereinafter referred to as monitoring device 15) connected.
  • monitoring device 15 This comprises a transmitting and receiving part 17 and a further device for signal evaluation (not shown in more detail), wherein a processor with a memory device can optionally be included.
  • the transmitting and receiving part 17 or at least parts thereof can also be arranged decentrally in the antenna element 11, so that only low-power data traffic takes place between the monitoring device 15 and the antenna element 11. The transmission power is then generated decentrally.
  • the antenna element 11 is connected to a decentralized device in a wired or wireless manner directly to a bus 19.
  • the monitoring device 15 can be connected to the transmitting and receiving part 17 and the connected antenna element 11 in the sense of the previous idea can also be referred to as a transceiver.
  • the monitoring device 15 can be, for example, a central unit in a switchgear or a branch or device-related device that is connected via a further data connection, e.g. is connected in terms of data technology via the bus 19 to a higher-order center 21.
  • This control center 21 can be a local control center, which in turn is connected to a higher-level network control center via a suitable interface 22.
  • control center 21 comprises suitable operating and display means, e.g. a keyboard and a screen, for the operation of the switchgear 1.
  • suitable operating and display means e.g. a keyboard and a screen, for the operation of the switchgear 1.
  • a portable device e.g. a portable computer or laptop, for
  • the data connections shown can be arbitrary, e.g. B. as a wired connection, in particular wire line or light guide, or wireless connection, e.g. Radio, sound or optical connection.
  • the antenna element 11 is arranged at an opening within the encapsulation 5.
  • the opening is formed by a flange 23 which is connected to a closure element 25, e.g. a cover and a pressure ring 27, is closed.
  • a closure element 25 e.g. a cover and a pressure ring 27
  • screw connections for the flange connection according to the prior art, which are not shown here, are to be provided.
  • the antenna element 11 thus lies within the encapsulation 5, so that the best conditions for problem-free information transmission to the SAWs 7a to 7d are given. Since the antenna element 11 is virtually inside a nozzle and does not protrude into the interior 4, electrical or field problems are avoided here. In addition, the antenna element 11 forms a structural unit with a component that can be detached from the encapsulation 5 anyway, so that it is easily accessible or can also be retrofitted.
  • the SAWs 7a to 7d are arranged partly on the encapsulation 5, partly on the busbar 6, on a movable part of the switching device 3 or also on or behind a first support 28, optionally in a separate gas space.
  • a plurality of sensors for different functions can be arranged collectively at one location and have a common antenna. It is also possible for a sensor to contain several measurement functions.
  • the sensors can have an areal size of approximately 5 to 100 cm 2 , the major part of the area forming the antenna element. It is essential for the function of the entire monitoring that there is a secure radio or data connection within the encapsulation 5.
  • the support 28 is made of a dielectric material ", so that the high-frequency transmission between the antenna element 11 and the SAW 7c located behind the support 28 is not impaired.
  • the material of the support must be provided accordingly (e.g. glass for an optical transmission).
  • the flange 23 or the opening required for coupling can be part of an existing maintenance opening, a gas filler neck, a casting resin filling opening, a viewing hole or an end flange, for example.
  • the embodiments described here, by way of example, can therefore be used analogously for any possible openings in switchgear assemblies, for example also for the end flange 29 shown.
  • a specially arranged opening can also be used.
  • the antenna element 11 it is also conceivable for the antenna element 11 to be arranged outside the encapsulation 5 and to radiate into the interior 4 via a dielectric window.
  • a filler neck in the region of a connecting flange of two encapsulation sections, for example, is suitable as an opening, the antenna element optionally being cast as a rod antenna being cast into the opening.
  • a further antenna (not shown in greater detail) is arranged in the gas space behind the further support 39, it is also possible to use the interior 4 of the encapsulation 5 as a transmission space, with protected data transmission over long distances being possible. This possibility can preferably be used with pipelines.
  • a combination with a simultaneous sensor query is conceivable.
  • the present idea essentially relates to the selective acquisition of the measured values, sizes or information acquired by the respective sensors, in particular the SAWs 7a to 7d. A distinction can first be made as to whether the SAWs are called selectively or not.
  • a selective call can be made, for example, using different frequencies (or channels). This would reserve a separate transmission channel for each SAW qua ⁇ i, the central-side call signal and the SAW-side response signal being on the same transmission channel in each case.
  • a further possibility is given in that a coding, identifier or another selection signal which is recognized in the SAW to be activated in each case is transmitted with a call signal which can be received by all SAWs and which then contains a response signal containing the corresponding information delivers. It is therefore possible that only the SAW (or SAW group) addressed responds.
  • all SAWs 7a to 7d can be activated with a common call signal from the antenna element 11, the selection being made subsequently after reception by the antenna element 11. This can be done, for example, by requesting the selected SAW with the call signal to provide an identifier, e.g. insert a pulse or signal pattern.
  • the signal mixture emitted by all SAWs is then analyzed with regard to the identifier, as a result of which the corresponding response signal can be filtered out and selected in the monitoring device 15.
  • a correlation method can be used here, for example.
  • a particularly simple selection can be given if the SAWs 7a to 7d emit response signals at different frequencies, which are only provided by different receiving antennas, which are provided by the common antenna element 11 of the Monitoring device 15 are formed, received and arrive at a separate receive evaluation in the transmitting and receiving part 17. It is important that only a common implementation for the antenna element 11 or a common opening is required.
  • All SAWs 7a to 7d are therefore called up by an antenna element 11, the selection of the respective response signals being carried out by means of a reception antenna which is matched or adjusted to the signal frequency of the response signal of the respective SAW.
  • the respective reception means can then also be connected to the common monitoring device 15, for example by means of a multiplex or switchover method.
  • OFW ⁇ 7a to 7d emit their response signal on the same frequency, one after the other, staggered in time.
  • the selection is then made only by selecting the response signal ⁇ of the respective SAW 7a to 7d located in a time window.
  • the respective SAWs 7a to 7d emit a differently polarized response signal, which makes it possible to distinguish between the respective response signals.
  • the distinction between the polarized electromagnetic waves then it could NEN Anten ⁇ by several or by an adjustable antenna element. 11
  • the use of this technique is conceivable especially for the limited propagation space of the waves, namely the encapsulation, which can be specifically described here. It is also possible that a special SAW only or " additional distinction" or
  • FIG. 2 shows the switchgear assembly 1, in which, in addition to the previous SAWs 7a to 7d, 5 further SAWs 7e to 7g are arranged outside the encapsulation. These are for example for recording an outside temperature (7e), a shift rod position (7f) or magnetic information (7g), e.g. trained by a position transmitter.
  • an additional interface 40 is assigned to the monitoring device 15, which is arranged outside the encapsulation 5. This is specifically responsible for the external SAWs 7e to 7g, which may also be used for other system parts or devices, e.g. an Freiluftschal ⁇ ter or its shift linkage can be assigned.
  • Monitoring device are carried out, which, however, is then connected in terms of data technology to a common higher-level device, for example the control center 21.
  • a common higher-level device for example the control center 21.
  • further interfaces 41 are also possible, via which other sensor devices, for example protective devices, optical current and voltage converters or similar sensors as listed above, can also be connected, but are different from the cables described above.
  • the sensor 42 is an example of this.
  • Wire lines or optical lines are possible as transmission lines.
  • 3 shows a further variant in which the information transmission between the monitoring device 15 and the external SAWs 7i and 7k takes place in an optical manner.
  • the monitoring device 15 has an infrared transmitting and receiving element 40a as the antenna element.
  • the antenna elements 9a of the SAWs 7i and 7k are accordingly designed as infrared means.
  • This type of information transfer can of course also be applied to the information transfer within the switchgear assembly 1 within a closed room.
  • the variant according to FIG. 3 is of course also with an acoustic information transmission, e.g. in the ultrasonic range, can be carried out appropriately.
  • the SAWs 7a to 7k can be designed as an active or as a passive component.
  • an additional energy supply is required. This can be provided, for example, by an energy store, in particular a battery, by an energy source available at the installation site or by an additional energy transmission. This transmission preferably takes place with the call signal emitted by the antenna element 11, which also transmits the corresponding power.
  • the additional energy in another way, e.g. is transmitted via light guide or by radio or optical means. If necessary, energy consumption is also possible at the installation location of the SAW.
  • the sensors described can preferably be arranged in field-free or field-reduced rooms of the system. This prevents cross-sensitivities.
  • the accommodation takes place at a location suitable for the respective measured variable, which can optionally be created by the shape of the encapsulation 5 or its internals.
  • 4 shows a pipeline 50 which is suitable for the transmission of electrical energy, for example for extremely high or medium voltage. If necessary, the pipeline 50 can also comprise switching devices or other electrical components in the interior of its encapsulation 5 in accordance with the above-described embodiments.
  • the present pipeline 50 can be an SF6 pipeline, for example, which is intended to enable energy transmission over longer distances, in particular several kilometers.
  • the pipe conductor 50 shown is shown interrupted to symbolize its long extension.
  • the interior 4 of the pipeline 50 is used here for information transmission. For this purpose, it has, similarly to the previously described designs, the antenna element 11 which is directed towards its inner wall 4.
  • the interior space 4 is divided into subspaces 49a, 49b, 49c, which are formed by partitions or supports 28, 39.
  • a further antenna element 51 is arranged in a subspace 49c as a counter station.
  • a transmitting and receiving device 53 is assigned to this via a connecting line 52.
  • the transmitting and receiving device 53 is constructed analogously to the monitoring device 15.
  • Information is now transmitted between the two antenna elements 11 and 51. This can serve a wide variety of tasks, e.g. for process control tasks, protective signal transmissions or voice signal transmissions. If necessary, information can also be exchanged with SAWs 7a to 7c. The differentiation of the respective information during the information transmission takes place analogously to the methods described above.
  • the information can be transmitted by means of acoustic, optical or electromagnetic waves.
  • the respective type of transmission is selected according to the Circumstances, for example, to what extent the transmission path interrupted by the supports 39 and 28 is suitable for the respective type of transmission.
  • the antenna elements 11 and 51 are preferably arranged at an assigned opening, their respective connecting lines being led out by means of suitable bushings.
  • the antenna elements 11, 51 can be arranged either inside or outside the interior 4.
  • the transmitting and receiving device 53 can include further interfaces 54 in the sense of the interfaces already described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Installation Of Bus-Bars (AREA)

Abstract

Conducteur tubulaire blindé (50), dans lequel un élément d'antenne (11) d'un dispositif de commande et de contrôle (15) est monté sur son blindage (5) et dirigé vers l'intérieur (4). L'intérieur (4) est utilisé comme espace de transmission pour une transmission sans fil d'informations à un autre élément d'antenne (51). Ceci permet d'obtenir une transmission protégée sur de longs parcours. De plus, il est possible d'avoir un échange d'informations avec des détecteurs (7a à 7k) montés à l'intérieur du blindage (4).
EP97904993A 1996-01-31 1997-01-20 Conducteur tubulaire blinde Ceased EP0878039A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19603463 1996-01-31
DE19603463 1996-01-31
PCT/DE1997/000090 WO1997028587A1 (fr) 1996-01-31 1997-01-20 Conducteur tubulaire blinde

Publications (1)

Publication Number Publication Date
EP0878039A1 true EP0878039A1 (fr) 1998-11-18

Family

ID=7784155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97904993A Ceased EP0878039A1 (fr) 1996-01-31 1997-01-20 Conducteur tubulaire blinde

Country Status (5)

Country Link
US (1) US6081729A (fr)
EP (1) EP0878039A1 (fr)
JP (1) JP2000504199A (fr)
CN (1) CN1212085A (fr)
WO (1) WO1997028587A1 (fr)

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WO1997028587A1 (fr) 1997-08-07
US6081729A (en) 2000-06-27
CN1212085A (zh) 1999-03-24
JP2000504199A (ja) 2000-04-04

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