EP1982200A2 - Procédé et dispositif pour détecter une mise à la terre d'un câble d'alimentation - Google Patents

Procédé et dispositif pour détecter une mise à la terre d'un câble d'alimentation

Info

Publication number
EP1982200A2
EP1982200A2 EP07726289A EP07726289A EP1982200A2 EP 1982200 A2 EP1982200 A2 EP 1982200A2 EP 07726289 A EP07726289 A EP 07726289A EP 07726289 A EP07726289 A EP 07726289A EP 1982200 A2 EP1982200 A2 EP 1982200A2
Authority
EP
European Patent Office
Prior art keywords
potential
supply cable
power supply
voltage
evaluation unit
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Withdrawn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
EP07726289A
Other languages
German (de)
English (en)
Inventor
Reinhard Hoffmann
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 EP1982200A2 publication Critical patent/EP1982200A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults

Definitions

  • the invention relates to a method for determining a ground fault of a multi-strand alternate current-carrying power cable in which a middle potential of Energyver ⁇ is sorgungshacks determines a derived from the mid-potential size or the center potential itself an off ⁇ evaluation unit is supplied to the evaluation unit which with ⁇ tenpotenzial or compares magnitude derived from the center potential with a threshold.
  • the invention further relates to a device for powering a load with an energy-supplying inverter, which is connected via a multi-strand power cable to the load, and means for determining a center potential of the power supply cable, which are connected to an evaluation unit.
  • ground faults In the case of the Transrapid, ground faults must be detected reliably, in particular in the supply cables of the motor sections of the stator but also in the motor windings themselves. In this case, the ground faults must be switched off within a prescribed time window, so that a possible Aus ⁇ extent to a short circuit or a personal hazard by excessive step voltages or voltage overloads of the energy transmission systems are avoided.
  • a Auswei ⁇ processing of the ground fault on a two-pole ground fault can cause a short circuit that can duezei ⁇ tig lose his limbo whereby the vehicle.
  • a problem with the earth fault detection in the engine sections of the Transrapid is the detection of a ground fault near the system star point. However, this area is accorded an increased importance.
  • a disadvantage of the earth fault detection is that a broad and varying spectrum of noise voltage frequencies is generated by power feeding inverter. However, the Störthesesfre- frequencies hinder the reliable Erd gleicherfas ⁇ solution.
  • the object of the invention is to provide a method and a device of the type mentioned, can be detected reliably and inexpensively with the ground faults.
  • the invention solves this problem, starting from the method mentioned in the fact that is closed when falling below the threshold on a ground fault.
  • the invention solves this problem, starting from the device mentioned above in that the evaluation unit for
  • an applied or already existing center potential is exploited in order to reliably close an earth fault. In doing so, it is considered that such a central potential is canceled in the event of a ground fault. Inven ⁇ tion is thus not monitored as in prior art method and apparatus, the symmetrical load of a multi-phase power supply line. Rather, in the error detection according to the invention is based on the directly or indirectly detected omission of the center potential.
  • the mid-potential of a symmetrical star point is determined ⁇ formers.
  • a neutral grounding transformer is beispielswei ⁇ se of three resistors which are respectively connected on one side with egg ⁇ ner of the phases of the power supply cable, the resistors are connected at their side facing away from the energy supply cable side galvanically with each other so that there is a neutral point is formed.
  • a voltage which is applied at one between the star point of the star point sometimesner and the earth potential switched load falls under recovery of voltage values recorded and the voltage values are transmitted to the evaluation unit.
  • the center potential as such ie the center potential directly, is used to detect a ground fault.
  • Falls below the mid-potential that is the voltage dropped across the said resistor voltage, a unit previously in the evaluation ⁇ specified as a parameter, for example stored threshold value, it is concluded that the presence of a ground fault.
  • a current flows between the neutral point of the star point former and the ground potential summarizes ER to give current values and the current values will wear to the evaluation unit via ⁇ .
  • the current detection at the neutral point takes place ⁇ example by means of a calibrated current transformer. If there is a central potential, a current flow can be detected between the neutral point and the Er ⁇ de. This is the case in normal operation. In the event of a ground fault, the center potential breaks down, the current flow driven by the center potential then tends towards zero. If the current flow falls below a threshold value set in the evaluation unit, an earth fault can therefore be deduced.
  • the inverter is connected via a transformer to the power supply cable being provided to set ⁇ means for generating a DC voltage shift in the power supply cable.
  • the addition means for generating a DC voltage shift comprise an asymmetrical passive rectifier circuit at the neutral point of the transformer.
  • passive ⁇ DC converter circuit is for example a series circuit of a Zener diode and a resistor, said
  • the environmentally additive grasp for generating a DC voltage offset to an unbalanced ⁇ active rectifier scarf ⁇ processing has, for example, an arbitrary DC voltage source.
  • the DC voltage source can be supplied by an AC mains or realized as an energy store. Solar cells can also be used in this context. Further possibilities include fuel cells, rechargeable battery units or the like as energy storage.
  • 1 shows an embodiment of the device according to the invention in a schematic representation
  • 2 shows a further embodiment of the device OF INVENTION ⁇ to the invention in a schematic representation
  • Figure 3 shows an embodiment of an additive for producing a mid-potential to Erfas solution ⁇ a DC voltage shift
  • FIG. 4 shows two further exemplary embodiments of an additional means for generating a center potential for detecting a DC voltage shift
  • FIG. 5 shows a further exemplary embodiment of an additional ⁇ means and for generating a center potential for detecting a DC voltage shift
  • Figure 6 shows a further additive for generating a
  • FIG. 1 shows an embodiment of the device 1 according to the invention in a schematic representation.
  • the ge Stand- te device 1 comprises an inverter 2, which via a multi-phase power supply line 3 to a load 4 ver ⁇ is prevented.
  • the power supply line 3 has a capaci tive ⁇ ground impedance, which is shown schematically by means of the capacitor 5 schematically ⁇ .
  • the coupling impedance 2a of the inverter 2 is schematically illustrated by a grounded capacitor and a resistor connected in parallel thereto.
  • the load impedance 4a is shown accordingly.
  • the coupling impedances 2a of the inverter 2 are non-losable coupling impedances.
  • FIG. 2 shows a further embodiment of the OF INVENTION ⁇ to the invention device 1.
  • the device 1 shown in Figure 2 differs from device 1 according to figure 1 DA by that the inverter 2 is connected via a transformer 8 with the power supply cable. 3 For this reason, no DC offset caused by the inverter 2 occurs. Therefore, additional means 9 are for the generation of a mid ⁇ supply potential provided, which in the embodiment shown, a Potenzialtruckner 10 and a charging ⁇ means 11 comprise the DC voltage shift of the central potential.
  • FIG. 3 shows an embodiment of a detection unit 6.
  • the detection unit 6 includes a neutral grounding transformer 12 which comprises three resistors 13, the one phase of the power supply cable are connected ver 3 ⁇ input side to in each case.
  • the resistors 13 are connected to each other, so that a star point 14 is formed.
  • the star point 14 is connected via a measuring resistor 15 to the ground potential, so that in the case of a DC voltage shift the center potential across the measuring resistor 15 can be tapped. This is done in the usual manner known in the art.
  • the thus summed ER- middle potential is then transmitted to the evaluation unit 7, the center compares the received potential with a threshold value and generates lenhongs falls below the smoldering ⁇ an error message.
  • Figure 4 shows the same two further embodiments of the detection unit 6.
  • the left part of the Figure 4 are as ⁇ the three ohmic resistors 13 shown, the connected input side, comparable with a respective phase of the power supply cable are.
  • the resistors 13 are galvanically connected to each other, so that a star point 14 is formed.
  • no measuring resistor is provided.
  • a calibrated current transformer 17 serves to detect the current driven by the center potential. In the event of a ground fault, the center potential and thus the driving force for the current flowing to ground collapse, so that the evaluation unit 7 generates an error message if the threshold falls below a threshold value.
  • FIG. 4 shows in its right part a further possibility for generating a middle potential.
  • voltmeter 18 three clamping ⁇ , each measuring the falling between a phase and the earth potential voltage and the measured value transmitted to the evaluation unit. 7
  • the evaluation unit 7 ⁇ calculated from the voltage values transmitted her the center potential. If the center potential falls below a threshold value, an error procedure is started again.
  • FIG. 5 shows an exemplary embodiment of the additive 9 for the DC voltage shift, in which the potential generator 10 is implemented as an ohmic resistor which is connected to the neutral point of the secondary windings 19 of the transformer 8.
  • the charging device 11 for Gleichthesesverschie ⁇ tion is in the illustrated embodiment by a simple Zener diode 20, which is connected between the ohmic resistor 13 as potential generator 10 and the ground potential. Due to this arrangement a Gleichwoodsverschie ⁇ tion is realized. In normal operation the captured Er handledsein ⁇ 6 standardized therefore a permanent direct current.
  • FIG. 6 shows a further exemplary embodiment of the additive 9 for generating a DC voltage shift, wherein the potential generator 10 is realized by three resistors 13 which are each connected to one phase of the power supply cable 3. At their from the power supply line 3 from ⁇ side facing the resistors 13 are connected together to form a star point 14, wherein the neutral point 14 bung via the charging device 11 to the DC voltage ⁇ is connected to the ground potential.
  • the charging device 11 consists here of a Zener diode 20 and a parallel to the Zener diode 20 arranged active voltage unit 21, for example, from a solar cell unit, a battery ⁇ unit or the like. In other words, an active rectifier circuit is provided.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'objectif concerne un procédé pour déterminer une mise à la terre d'un câble d'alimentation en énergie (3) à plusieurs brins qui conduit le courant alternatif. Ce procédé consiste : à déterminer un potentiel moyen du câble d'alimentation en énergie; à entrer le potentiel moyen ou une grandeur dérivée de ce potentiel moyen dans une unité d'évaluation (7), et; à comparer le potentiel moyen ou la grandeur dérivée de ce potentiel moyen à l'aide de ladite unité d'évaluation (7). L'objectif de cette invention est de créer un procédé permettant de détecter les mises à la terre d'une matière fiable et peu onéreuse. Ainsi, le procédé selon l'invention est conçu de manière qu'un dépassement de la valeur seuil indique une mise à la terre.
EP07726289A 2006-02-07 2007-02-02 Procédé et dispositif pour détecter une mise à la terre d'un câble d'alimentation Withdrawn EP1982200A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006006350A DE102006006350A1 (de) 2006-02-07 2006-02-07 Verfahren und Einrichtung zur Erdschlusserfassung in einem Versorgungskabel
PCT/EP2007/051012 WO2007090791A2 (fr) 2006-02-07 2007-02-02 Procédé et dispositif pour détecter une mise à la terre d'un câble d'alimentation

Publications (1)

Publication Number Publication Date
EP1982200A2 true EP1982200A2 (fr) 2008-10-22

Family

ID=38178919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07726289A Withdrawn EP1982200A2 (fr) 2006-02-07 2007-02-02 Procédé et dispositif pour détecter une mise à la terre d'un câble d'alimentation

Country Status (6)

Country Link
US (1) US20090167314A1 (fr)
EP (1) EP1982200A2 (fr)
JP (1) JP2009526203A (fr)
CN (1) CN101371149A (fr)
DE (1) DE102006006350A1 (fr)
WO (1) WO2007090791A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8659858B2 (en) * 2010-08-24 2014-02-25 Sanyo Electric Co., Ltd. Ground-fault detecting device, current collecting box using the ground-fault detecting device, and photovoltaic power generating device using the current collecting box
AT510534A1 (de) * 2010-10-04 2012-04-15 Eaton Gmbh Detektoreinheit zum erkennen einer neutralleiterunterbrechung in einem symmetrischen mehrphasenstromnetz
WO2013153596A1 (fr) * 2012-04-09 2013-10-17 東芝三菱電機産業システム株式会社 Circuit de détection de défaut de mise à la terre et dispositif de conversion de puissance l'utilisant
US9500710B2 (en) * 2012-10-15 2016-11-22 Siemens Energy, Inc. Generator neutral ground monitoring system and method
CN103809070B (zh) * 2012-11-15 2017-11-17 施耐德电器工业公司 基于三相电流变化进行的方向接地故障检测方法和装置
RU2015155913A (ru) * 2013-07-02 2017-08-07 Филипс Лайтинг Холдинг Б.В. Устройство и способ для исследования кабельной системы
CN107408811A (zh) * 2014-12-17 2017-11-28 海德里尔美国配送有限责任公司 用于海底缆线接地故障隔离的系统和方法
DE102016117062A1 (de) * 2016-09-12 2018-03-15 HELLA GmbH & Co. KGaA Vorrichtung zum Betreiben eines Gleichspannungswandlers
CN110426601A (zh) * 2019-08-22 2019-11-08 金华电力设计院有限公司 一种不接地光伏系统的故障定位方法
CN113819959B (zh) * 2021-11-24 2022-02-08 中国空气动力研究与发展中心设备设计与测试技术研究所 一种基于海林格距离和相关系数的悬浮系统异常检测方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398188A (en) * 1981-10-07 1983-08-09 Feigal Donn L Ground circuit voltage detector
US5065104A (en) * 1987-02-17 1991-11-12 Alexander Kusko Fault sensing with an artificial reference potential provided by an isolated capacitance effect
US4858056A (en) * 1988-06-06 1989-08-15 General Electric Company Molded case circuit breaker actuator-accessory module
CA2003191A1 (fr) * 1988-11-21 1990-05-21 Shigeki Tezuka Systeme d'alimentation en energie electrique pour automobile
JP2723286B2 (ja) * 1989-03-08 1998-03-09 株式会社東芝 地絡検出装置
DE3920177A1 (de) * 1989-06-16 1990-12-20 Licentia Gmbh Verfahren und anordnung zur erdschlusserfassung in nicht geerdeten mehrphasigen versorgungsnetzen, insbesondere hoeherer betriebsspannung
JP3324387B2 (ja) * 1996-04-08 2002-09-17 三菱電機株式会社 地絡検出回路及び地絡検出回路を備えた回路遮断器
JP3279215B2 (ja) * 1997-02-14 2002-04-30 日新電機株式会社 電力系統の地絡検出方法
US6154036A (en) * 1999-03-18 2000-11-28 Abb Power T&D Company Inc. Ground fault location system and ground fault detector therefor
US7170405B2 (en) * 2000-12-26 2007-01-30 General Electric Company Method and apparatus for interfacing a power line carrier and an appliance
US6807036B2 (en) * 2001-04-26 2004-10-19 Hubbell Incorporated Digital fault interrupter with self-testing capabilities
SE526446C2 (sv) * 2003-03-05 2005-09-13 Jan Berggren Detektering av jordfel i trefassystem
US6900643B2 (en) * 2003-08-06 2005-05-31 Ballard Power Systems Corporation Ride through in electronic power converters
US7295016B2 (en) * 2004-06-18 2007-11-13 Kokusan Denki Co., Ltd. Electric leakage detection system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007090791A2 *

Also Published As

Publication number Publication date
CN101371149A (zh) 2009-02-18
WO2007090791A2 (fr) 2007-08-16
US20090167314A1 (en) 2009-07-02
WO2007090791A3 (fr) 2007-11-15
JP2009526203A (ja) 2009-07-16
DE102006006350A1 (de) 2007-08-16

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