WO2006097455A1 - Dispositif de mesure pour mesurer sans contact un courant - Google Patents

Dispositif de mesure pour mesurer sans contact un courant Download PDF

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Publication number
WO2006097455A1
WO2006097455A1 PCT/EP2006/060678 EP2006060678W WO2006097455A1 WO 2006097455 A1 WO2006097455 A1 WO 2006097455A1 EP 2006060678 W EP2006060678 W EP 2006060678W WO 2006097455 A1 WO2006097455 A1 WO 2006097455A1
Authority
WO
WIPO (PCT)
Prior art keywords
hall sensor
measuring device
measuring
sensor units
electronics
Prior art date
Application number
PCT/EP2006/060678
Other languages
German (de)
English (en)
Inventor
Jens Burger
Reinhold Keck
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP06708748A priority Critical patent/EP1859286A1/fr
Publication of WO2006097455A1 publication Critical patent/WO2006097455A1/fr

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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
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices

Definitions

  • the invention relates to a measuring device for measuring a current berckenungslo ⁇ sen in particular in high and medium voltage range ⁇ .
  • Hall sensor It is known to measure a current by means of a Hall sensor berüh ⁇ rungslos.
  • the Hall sensor measures the current flowing through the conductor not directly, but the magnetic field generated by the current and surrounds the conductor. Because of ⁇ it is possible to arrange the Hall sensor outside the conductor, in particular to arrange it so that it is not in contact with the current-carrying conductor, so it does not touch. With Hall sensors direct and alternating currents can ⁇ smallest currents up to several thousand amperes and easy to measure floating.
  • Hall sensors In the high and medium voltage range, there are approaches to use Hall sensors for the contactless measurement of a current-carrying conductor: Known measuring devices measure the current by means of large coils. These are expensive, heavy and very bulky. Using Hall sensors is now possible, small, cheap and handy measuring devices near, ⁇ ask.
  • Hall sensors As an independent electronic component, for example in the form of a chip. Certain functions, such as communication functions for communicating with other components or functions for digitizing the measurement signals, can be integrated in such a component.
  • the disadvantage is that the increased complexity and the probability of failure of these components compared to primary components used in the network (for example, circuit breaker) is relatively high.
  • primary components used in the network for example, circuit breaker
  • designed as an electronic component Hall sensor unit has a much lower life than the primary components used in the network, which have a lifespan of 40-50 years in the current state of the art. If one uses such a Hall sensor units, for example, for continuous monitoring of the flow of a power grid, so would have a relatively high repair and overhaul costs of such a measuring device during the life cycle ei ⁇ ner primary system be expected and thus caused a temporary loss of functionality.
  • Measuring device described type usually perform certain tasks.
  • a typical task would be over ⁇ monitoring of an energy network:
  • the measuring device when a current is measured that leaves a defined area a guideline, triggers a protective function.
  • the protection ⁇ function can be connected in extreme cases with a shutdown of the network. This shows that it is essential to make measuring devices as unsusceptible as possible.
  • a measuring device for non-contact measurement of a current in particular in the high and Mittelwoodsbe ⁇ rich, in principle, in the low voltage range, created
  • the measuring electronics at least two connectable to the measuring ⁇ electronics Hall sensor units and a receiving device for recording contains the measuring electronics and Hall sensor units, wherein a Hall sensor unit to ⁇ at least one Hall sensor and the Hall sensor unit while maintaining the operation of the measuring device from the measuring device for replacement is solvable, the error rate is such a measuring device redu ⁇ ed, and by the modular structure in the event of a fault, a simple repair possible.
  • the Hall sensor units measure by means of their Hall sensor, the magnetic field of the current-carrying conductor.
  • the voltage generated in the Hall sensors is passed on to the measuring electronics. Within the measuring electronics, the signals transmitted by the Hall sensor units are converted into current values.
  • Hall sensor units it is also possible to design the Hall sensor units in such a way that they independently digitize the recorded measured values and only the digitized values are sent to the measuring electronics for further evaluation, for example for Pass on the calculation of the current.
  • other functions can be integrated in the Hall sensor units.
  • a Hall sensor unit can be used to perform a voltage measurement / processing.
  • a separate Hall sensor unit is used for voltage measurement.
  • a Hall-sensor unit provided for current measurement in addition to the voltage measurement.
  • a cost-effective measuring device can be formed, with wel ⁇ cher a current and a voltage can be detected.
  • the Hall sensor unit has an additional ⁇ analog digital-to-digital converter for the voltage measurement.
  • the additional analog-to-digital converter is equipped with an additional transmission channel.
  • An analog chip ⁇ voltage signal for example by a voltage divider, is supplied to the additional analog-digital converter, digitized there and discharged via the additional transmission channel over ⁇ . The digitized voltage signals are available for further processing.
  • the measuring electronics in the simplest case evaluate the signals received from the Hall sensors, they calculate the current that flows through the conductor. For this purpose, it uses the measuring signals of the used Hall sensor units. If a Hall sensor unit fails, for example due to an error, then at least the signals of a further Hall sensor unit of the measuring electronics are present. The measuring device is thus able to maintain its function: the measuring electronics registers a malfunction of a Hall sensor unit and then continues their processing by means of the remaining functioning Hall sensor units. The technician wishing to repair the measuring device can replace the defective Hall sensor unit without interrupting the operation of the measuring device.
  • the measuring electronics switch exchange of a Hall sensor unit autonomously in normal operation to ⁇ back.
  • the measuring electronics can be equipped with a function that transmits the status of the Hall sensor units to a higher-level unit.
  • a higher-level unit could, for example, be a monitoring station. If a Hall sensor unit fails, this would be registered by the monitoring station and, if necessary, measures for repair could be initiated.
  • the safety of the measuring device can be increased by using additional Hall sensor units. Using multiple Hall sensors also allows the current to be determined with greater accuracy.
  • Hall sensor units and measurement electronics th as a single electronic part to decor with dark ⁇ .
  • the recording device is used for secure attachment of measuring electronics and Hall sensor units.
  • the receiving device may be designed differently.
  • such a measuring device can be used in various networks or installations.
  • the measuring device could be in a bulkhead or a connector connecting two regions of the gas-insulated conductor may be integrated.
  • the bulkhead or connector would thus be used as a cradle.
  • several externally accessible inlets can be provided, in which the Hall sensor units are inserted and measure in this position, the magnetic field of the current-carrying conductor.
  • the measuring electronics would preferably also be accommodated outdoors.
  • the measuring device has plug connections to which or in which the Hall sensor units can be inserted.
  • a plug-in is particularly suitable for a simp ⁇ chen replacement of the component. Tools for this are not necessary, the plugging and unplugging can be done manually. Alternatively, however, the connections may also be threaded connections, connections made by jamming, or similar easily detachable connections.
  • the Hall sensor unit consists of a chip in which a Hall sensor and an electronics for measuring the Hall voltage by means of Kompensationskar and for digitizing the measured Hall voltage is integrated.
  • the Hall sensor unit thus includes several functions. On the one hand, the measuring voltages generated by the Hall sensor are compensated by a compensation circuit. The wide These compensated signals are digitized by electronics. In a preferred variant, the chip is equipped with a serial interface, by means of which the measured Hall voltage is transmitted securely.
  • a further advantageous embodiment of the invention provides that the measuring electronics has a compensation device which determines by means of the Hall sensor units an interference field at the location of the measuring device and takes into account the interference field in the measurement of the current, and in case of failure or replacement of a Hall Sensor unit continues to calculate the noise field using the remaining functioning Hall sensor units.
  • Interference fields which overlap with the field of the current-carrying conductor would falsify the current determined by the measuring device. If these interference fields are not negligible, it is advantageous to determine these and to take them into account when calculating the current.
  • the course and location of the interference field can be limited via the location and measured value of the individual Hall sensors.
  • the measuring device is able to take account of the interference field to a certain extent. It is advantageous for the determination of the interference field to use a large number of Hall sensor units.
  • a Hall sensor unit fails , for example as a result of an error or due to maintenance-related replacement, then this is registered by the measuring electronics. Furthermore, if necessary, the measuring electronics changes the algorithm used to calculate the interference field. This prevents that due to the failure of one of the Hall sensors, the interference field is calculated incorrectly and the measured current value is falsified. If the number of Hall sensor units and several units thus can fail without the function ⁇ on the measuring device is significantly impaired, which means that the measured current values deviate too much from the real power of the conductor.
  • a further advantageous development of the invention provides that a plurality of measuring electronics are contained in the measuring device.
  • a further advantageous embodiment of the invention provides that the receiving device includes a board for receiving the measuring electronics and Hall sensor units.
  • Measuring electronics and Hall sensor units are arranged together on a circuit board.
  • the circuit board may further be provided with conductor tracks, through which the electrical connections fertil between measuring electronics and Hall sensor units are manufactured.
  • the receiving device has a toroidal core for receiving the measuring electronics and Hall sensor units, and at least one Hall sensor unit is disposed in a ring located in the ring ⁇ core space, opening or air gap.
  • the ring core surrounding the current concentrates the magnetic field generated by the current.
  • the Hall sensor unit which is arranged in a space located in the ring core or opening, is thus exposed to an amplified magnetic field. Due to the amplification, it is possible to measure even small currents.
  • the space or opening in the toroidal core is designed as an air gap accessible from the outside. In this gap, the Hall sensor unit is ⁇ feasible. This allows insertion or replacement of the Hall sensor unit, without having to relate the ring core ⁇ in this action.
  • a further advantageous embodiment of the invention provides that the receiving device is segmented, but at least divided into two parts.
  • a further advantageous embodiment of the invention provides that the measuring device of a cover umschlos ⁇ sen is.
  • the cover protects the measuring device from external influences, for example from the weather.
  • the cover may for example be made of aluminum.
  • the cover as a shield, which shields the measuring device from external interference fields.
  • the cover could consist of a ferromagnetic material or at least include.
  • a further advantageous embodiment of the invention provides that the cover is at least divided into two for the purpose of removing the cover during operation of the Messvorrich ⁇ device or for maintenance.
  • the cover consists of two symmetrical parts.
  • the cover with components of the measuring device.
  • the Hall sensor units could be connected to parts of the cover. Removal of a portion of the cover would also remove the associated component (s), in this example the Hall sensor unit. This would further reduce the handles for replacing individual components.
  • FIG. 2 shows a second measuring device according to the invention in a side view
  • Figure 3 shows a cover according to the invention in a side ⁇ view
  • Figure 4 sketchily a toroidal core according to the invention.
  • FIG 1 shows a sketch of a first inventive measuring ⁇ device in the supervision.
  • the measuring device 1 includes an annular receiving device 4. On this annular receiving device two measuring electronics 2a, 2b and eight Hall sensor units 3 are arranged. Here are the two measuring electronics 2a, 2b directly opposite.
  • the Hall sensor units 3 are arranged in pairs, radially one behind the other, at an angular distance of 90 ° circumferentially on the receiving device. Thus, the four sensor units are located on the inner edge of the annular receiving device and on the outer edge of the annular receiving device.
  • the receiving device 4 has an outer diameter of 450 mm and an inner diameter of 290 mm. It essentially consists of a board, which is divided into two halves. Both halves 4a and 4b are held together by connecting pieces 5.
  • the receiving device 4 or the circuit board 4 has strip conductors, the measuring electronics 2a, 2b with connect the Hall sensor units 3 electrically.
  • the division of the receiving device makes it possible to separate the receiving device if necessary, for example, when installing or removing the measuring device 1.
  • Figure 1 illustrates in this respect the built-in measuring device 1, which surrounds a current-carrying conductor 6.
  • the measuring device 1 is in this case arranged so that the current-carrying conductor 6 is located in the center of the annular plate 4.
  • the Hall sensor units 3 are inserted by means of detachable connectors on the annular board 4. As a result, if necessary, a quick replacement of the Hall sensor units is possible.
  • the connectors are not shown here in detail.
  • the Hall sensor units 3 consist of a chip in which a Hall sensor and electronics for measuring the Hall voltage by means of Kompensationskal and digitizing the measured Hall voltage, and a function for temperature compensation and to compensate for an offset of the measured Electricity is integrated.
  • the four Hall sensor units 3, which lie in the inner region of the annular plate 4, are designed to measure the magnetic field generated by the current-carrying conductor 6 in normal operation.
  • the four Hall sensor units 3, which are arranged in the outer region of the circuit board 4, are provided to measure the magnetic field of the current-carrying conductor 6 in the case of a very high current or a short ⁇ circuit.
  • the measuring electronics 2 a and the measuring electronics 2 b receive the digitized and compensated measured values of the Hall sensor units 3 via the conductor tracks of the board 4 Measuring electronics 2a, 2b evaluate these received signals, that is, the current of the current-carrying conductor 6 is determined. In this case, the measuring electronics 2 are able to calculate interference fields, which are superimposed on the field of the current-carrying conductor 6, to a certain extent by means of the positions and the measured values of the Hall sensor units 3. The current of the current-carrying conductor 6 is also calculated taking into account the positions of the individual Hall sensor units 3 and the geometry of the magnetic field generated by current-carrying conductor 6.
  • the measuring electronics 2 are designed so that a failure of one or more Hall sensor units 3 is taken into account.
  • the measuring electronics 2 register the failure of a Hall sensor unit.
  • the calculation of the current of the current- carrying conductor from the measured values of the Hall sensor units taking into account an interference field is continued below, excluding the faulty Hall sensor unit. In this way, the operation of the measuring device 1 can also be maintained if one or more Hall sensor units 3 are faulty. After replacing the faulty component, the measuring electronics 2a and 2b switch back to normal operation.
  • the measuring electronics are detachably connected to the circuit board 4 via plug connections.
  • the structure of the measuring device 1 thus completely modular.
  • Measuring electronics 2 or Hall sensor units 3 can be removed or replaced without the operation of the measuring device 1 being severely impaired.
  • the division of the board 4 allows the installation and removal of the measuring device 1 in the operation of the conductor. 6
  • FIG. 2 shows a second measuring device according to the invention in a side view.
  • the measuring device 1 consists Wesent ⁇ union of a toroidal core 7 of two measurement electronics 2, and of eight Hall sensor units 3, enclosed by a cover 8.
  • the ring core 7 is made of iron and is two ⁇ divides.
  • In the ring core there are eight openings in the form of an air gap 11 (shown in Figure 3). All column 11 are ra ⁇ dial aligned with the center of the ring core 7. They are arranged in sections of 45 ° each.
  • FIG. 1 A sketch of the ring core 7 and the column 11 is shown in FIG. Here it is also shown that the toroidal core is divided into two halves 7a and 7b. Both halves are held together by a nonmagnetic strap 10.
  • each case four of the Hall sensor units are arranged outside of the ring core 7 and inside the ring core 7. In fi gure 2 ⁇ but only a Hall sensor unit 3 is visible.
  • the Hall sensor units 3 are fastened by means of plug connections so that they can be easily removed or replaced. They are arranged circumferentially at an angular distance of 90 °.
  • the four Hall sensor units outside of the ring core 7 are provided to measure the magnetic field ei ⁇ nes with a high current flowing through the conductor.
  • the four Hall sensor units within the ring core 7 are due to the bundling properties of the ferromagnetic Toroidal 7 also able to measure small currents.
  • the values measured by the Hall sensor units are forwarded to the measuring electronics 2 via copper wires and evaluated there.
  • the cover 8 encloses the ring core 7, the Hall sensor units 3 and the measuring electronics 2 completely. Thereby, the measuring device 1 is also under adverse circumstances, such as. outdoors, can be used.
  • the cover 8 is made of aluminum. It is divided in half. At one of the two halves of the cover 8, in this embodiment, at the half 8a, in the region of the junction of the two halves 8a and 8b, an aluminum strip is attached. When merging the two halves 8a and 8b, the aluminum strip 9 slides over the edge region of the cover 8b. By means provided in the cover 8b and the aluminum strip 9 thread or openings, the two halves 8b and 8a of the cover 8 can be fastened to each other via screw.
  • the cover 8 Due to the division of the cover 8, it is possible, even during use of the measuring device 1 access to the components of the measuring device 1, such as the measuring electronics 2 or the Hall sensor units 3 or the toroidal core 7, to obtain. After removal of the cover, for example, they can be removed, inserted or replaced.
  • Materia ⁇ materials or combinations of materials can be used for the cover. If you want to achieve with the cover a certain shielding of the measuring device ⁇ , then ferromagnetic materials offer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

L'invention concerne un dispositif de mesure (1) pour mesurer sans contact un courant, notamment dans le domaine des moyennes et hautes tensions. Ce dispositif de mesure comporte une électronique de mesure (2a, 2b), à laquelle peuvent être raccordées au moins deux unités capteurs de Hall (3). Une unité comprend au moins un capteur de Hall et cette unité capteur de Hall peut être détachée du dispositif de mesure pour être échangée, le dispositif de mesure restant alors en fonctionnement. Ainsi, le dispositif de mesure de l'invention assure un fonctionnement permanent et sa maintenance est aisée.
PCT/EP2006/060678 2005-03-18 2006-03-14 Dispositif de mesure pour mesurer sans contact un courant WO2006097455A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06708748A EP1859286A1 (fr) 2005-03-18 2006-03-14 Dispositif de mesure pour mesurer sans contact un courant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005013232.4 2005-03-18
DE200510013232 DE102005013232A1 (de) 2005-03-18 2005-03-18 Messvorrichtung zum berührungslosen Messen eines Stromes

Publications (1)

Publication Number Publication Date
WO2006097455A1 true WO2006097455A1 (fr) 2006-09-21

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PCT/EP2006/060678 WO2006097455A1 (fr) 2005-03-18 2006-03-14 Dispositif de mesure pour mesurer sans contact un courant

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EP (1) EP1859286A1 (fr)
DE (1) DE102005013232A1 (fr)
WO (1) WO2006097455A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010036040A1 (de) * 2010-08-31 2012-03-01 Jungheinrich Aktiengesellschaft Strommesseinrichtung, insbesondere in einem Umrichter eines Flurförderzeugs
DE102011078698B3 (de) * 2011-07-05 2012-11-15 Beckhoff Automation Gmbh Potentialfreie Strommessung
LU93328B1 (de) * 2016-12-01 2018-06-05 Phoenix Contact Gmbh & Co Kg Intellectual Property Licenses & Standards Vorrichtung zur Messung von in einem elektrischen Leiter fliessendem Strom
DE102016123255A1 (de) 2016-12-01 2018-06-07 Phoenix Contact Gmbh & Co. Kg Vorrichtung zur Messung von in einem elektrischen Leiter fließendem Strom
BE1026805B1 (de) 2018-11-27 2020-06-30 Phoenix Contact Gmbh & Co Lagekompensierte Strommesseinrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268269B (de) * 1964-07-02 1968-05-16 Halmar Electronics Verfahren zum Messen von Gleichstrom
JPS5762515A (en) * 1980-10-03 1982-04-15 Toshiba Corp Current transformer
US5014043A (en) * 1987-12-07 1991-05-07 Southern California Edison Current sensing
EP1113277A1 (fr) * 1999-12-29 2001-07-04 ABB T&D Technologies Ltd. Elément de traversée pour applications de tension moyenne et haute
US6466004B1 (en) * 2000-04-27 2002-10-15 Sensotec, Inc. Apparatus and method for measuring weld circuit
US20020167301A1 (en) * 1999-09-28 2002-11-14 Haensgen Steven T. Hall effect current sensor system packaging
US20040027891A1 (en) * 2002-06-27 2004-02-12 Udo Hartmann Configuration for testing semiconductor devices

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268269B (de) * 1964-07-02 1968-05-16 Halmar Electronics Verfahren zum Messen von Gleichstrom
JPS5762515A (en) * 1980-10-03 1982-04-15 Toshiba Corp Current transformer
US5014043A (en) * 1987-12-07 1991-05-07 Southern California Edison Current sensing
US20020167301A1 (en) * 1999-09-28 2002-11-14 Haensgen Steven T. Hall effect current sensor system packaging
EP1113277A1 (fr) * 1999-12-29 2001-07-04 ABB T&D Technologies Ltd. Elément de traversée pour applications de tension moyenne et haute
US6466004B1 (en) * 2000-04-27 2002-10-15 Sensotec, Inc. Apparatus and method for measuring weld circuit
US20040027891A1 (en) * 2002-06-27 2004-02-12 Udo Hartmann Configuration for testing semiconductor devices

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 136 (E - 120) 23 July 1982 (1982-07-23) *
SCOVILLE J T ET AL: "A LOW-COST MULTIPLE HALL PROBE CURRENT TRANSDUCER", REVIEW OF SCIENTIFIC INSTRUMENTS, AIP, MELVILLE, NY, US, vol. 62, no. 3, 1 March 1991 (1991-03-01), pages 755 - 760, XP000224321, ISSN: 0034-6748 *

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Publication number Publication date
EP1859286A1 (fr) 2007-11-28
DE102005013232A1 (de) 2006-09-28

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