WO2011157469A1 - Montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre - Google Patents

Montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre Download PDF

Info

Publication number
WO2011157469A1
WO2011157469A1 PCT/EP2011/056662 EP2011056662W WO2011157469A1 WO 2011157469 A1 WO2011157469 A1 WO 2011157469A1 EP 2011056662 W EP2011056662 W EP 2011056662W WO 2011157469 A1 WO2011157469 A1 WO 2011157469A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
measuring
intermediate circuit
network
potentials
Prior art date
Application number
PCT/EP2011/056662
Other languages
German (de)
English (en)
Inventor
Andreas Trautmann
Vicente Garcia Alvarez
Dragan Mikulec
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2011157469A1 publication Critical patent/WO2011157469A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G01R27/18—Measuring resistance to earth, i.e. line to ground
    • 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
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • 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

  • Circuit arrangement for determining a voltage fluctuation of
  • the invention relates to a circuit arrangement for determining a
  • inverter - For the drive in hybrid or electric vehicles electrical machines in the form of induction machines are usually used, which in conjunction with inverters - often referred to as inverter - are operated.
  • the electrical energy for the operation of the electric machine is in this case from a disconnected from the electrical system of the vehicle, ungrounded power supply, e.g. in the form of a powerful high-voltage battery.
  • the ungrounded electrical network created in this way often referred to as the IT network (Isole Terre) - reduces the risk of e.g. of service personnel, since with a single error, such as an insulation fault, no closed circuit is built.
  • the operation must not be adjusted when a single fault occurs, so that an insulation fault can be reported without it already has a system failure. For this, however, it is necessary that the insulation resistance of the electrical network is continuously or at least periodically monitored during operation of the vehicle, which is possible, for example, based on a voltage fluctuation of the conductor potentials of the IT network.
  • Insulation resistance in an IT network with a DC intermediate circuit and at least one self-commutated converter and a measuring arrangement for measuring the DC link voltage against ground potential known in the an offline and an online measurement are provided.
  • the potentials Up and Um as well as the intermediate circuit voltage are measured and from this the insulation resistance is determined.
  • the potentials Up and Um are measured and the time course of the measurements is evaluated. For this purpose, in particular the two potentials are summed, the sum Fourier-transformed and evaluated the change of the frequency spectrum in its time course.
  • a method for insulation monitoring for in-service converter arrangements comprising a voltage intermediate circuit having at least one positive branch and one negative branch, at least one electrical device having at least two phase terminals, and at least one inverter Circuit elements for electrically connecting the phase terminals with the positive branch or the negative branch of the voltage intermediate circuit comprises. It is provided that an operating state of the inverter during the inverter is in operation and the electrical device, which also in a
  • Normal operation is, fed, is determined by detecting parameters of a converter control.
  • at least one of the voltages of the positive branch or the negative branch is measured.
  • the present invention provides a circuit arrangement for determining a voltage fluctuation of conductor potentials in an ungrounded electrical network, the network comprising a DC intermediate circuit, an n-phase network with an n-phase electrical load, n> 3, and at least one inverter connected to the DC link to
  • Control of the electrical load includes. According to the invention is a
  • (Artificial) star point provided at which the phases of the n-phase network are brought together via impedances, also is a measuring device for measuring a, a measuring voltage at the neutral point with respect to a Characterized reference potential during the operation of the electrical load consumer, wherein the measuring voltage represents the voltage fluctuation of supply voltage potentials of the DC link to the reference potential.
  • the invention is based on the idea that a neutral point, at which the phases of the at least three-phase network are combined, changes during operation of the electrical load and thus of the inverter depending on the respective switching state of the inverter.
  • Star point which corresponds to the measuring voltage, thus provides a measure of a voltage fluctuation of the supply voltage potentials of
  • Measuring voltage derived size which thus characterized the measuring voltage, are measured.
  • the described relationships apply regardless of the operating mode (block timing, pulse width modulation) of the inverter.
  • a calculation unit which determines an auxiliary voltage by forming the difference between a star point voltage, which results at the star point in relation to the half of the intermediate circuit voltage, and the measuring voltage.
  • Auxiliary voltage represents voltage fluctuations of
  • Supply voltage potentials of the DC intermediate circuit against the reference potential can thus also, for example. for the determination of
  • Insulation resistance of the IT network can be used.
  • the measuring range is the
  • Voltage measuring device adapted to a maximum amplitude of the voltage fluctuation, whereby the measurement accuracy is increased
  • FIG. 1 is a schematic block diagram of an ungrounded network with a DC intermediate circuit, a connected thereto inverter, a 3-phase electric machine and a circuit arrangement according to the invention
  • Measuring voltage of FIG. 4 a graphical representation of the time course of the
  • Measuring voltage of FIG. 6 a graphical representation of the time course of the
  • FIG. 1 shows a schematic representation of a 3-phase network 1 with a three-phase electric machine 2, which may be designed, for example, as a synchronous, asynchronous or reluctance machine with a pulse inverter connected thereto 3.
  • the pulse inverter 3 includes
  • Switching elements 4a-4f in the form of circuit breakers, which are connected to individual phases U, V, W of the electric machine 2 and the phases U, V, W either against a voltage applied to a positive supply voltage rail 5 of a DC intermediate circuit 6 positive
  • the connected to the positive supply voltage rail 5 switching elements 4a-4c are also called “high-side switch” and the negative Supply voltage rail 7 connected switch 4d-4f referred to as “low-side switch” and can be embodied for example as Insulated Gate Bipolar Transistor (IGBT) or as Metal Oxide Semiconductor Field-Effect Transistor (MOSFET)
  • IGBT Insulated Gate Bipolar Transistor
  • MOSFET Metal Oxide Semiconductor
  • the pulse inverter 3 determines the power and mode of operation of the electric machine 2 and is controlled by a controller 9, e.g. in the form of a microcontroller, driven accordingly.
  • the electric machine 2 can be operated either in motor or generator mode.
  • the pulse inverter 3 also includes a so-called
  • DC link capacitor 10 which essentially serves to stabilize a voltage of a high-voltage energy storage in the form of a high-voltage battery 1 1 in the DC voltage intermediate circuit 6.
  • An electrical system 12 of the vehicle with a low-voltage energy storage in the form of a low-voltage battery 13 is connected via a DC-DC converter 14 parallel to the DC-link capacitor 6.
  • the electric machine 2 is designed in the illustrated embodiment, three-phase, but may also have more than three phases. Preferably, however, the number of phases is divisible by three or at least by three. For example, for service purposes, it is necessary, the high-voltage battery 1 1 in the idle state of the DC voltage intermediate circuit 6 - often as
  • Main contactors 15 and 16 and a Vorladeflex 17 are provided.
  • Vorladewall allows a current limited charge of the
  • phase U, V, W in the 3-phase network 1 are combined via impedances Zi, Z 2 and Z 3 to an (artificial) star point P1.
  • impedances Zi, Z 2 and Z 3 to an (artificial) star point P1.
  • Measuring device 19 can be measured at the star point P1, a measurement voltage U M relative to the reference potential, which directly a
  • Voltage fluctuation of the supply voltage potentials T + and T- of the DC intermediate circuit 6 is represented against the reference potential.
  • the measuring range of the voltage measuring device 19 is advantageous to a maximum amplitude of the voltage fluctuation adjusted.
  • the impedances Zi, Z 2 and Z 3 can, as shown, be formed from ohmic resistors or else with the aid of capacitances and / or inductances.
  • the individual connecting lines to the star point P1 also several connecting lines to the star point P1 also several
  • Impedances can be provided. Alternatively to the direct measurement of
  • Measuring voltage U M can also be another derived from the measuring voltage U M size, which thus characterized the measuring voltage U M , are measured.
  • the reference potential oscillates against half the DC link voltage, as shown in Figure 3 by way of example for block timing.
  • the amplitude of this oscillation depends on the
  • Voltage measuring device 19 is measured. This represents one
  • the measuring voltage U M a Frequency transformation, preferably a fast Fourier transform (FFT) subjected, in order to calculate the frequency spectrum of the measuring voltage U M in this way.
  • FFT fast Fourier transform
  • characterizing size such as the electrical angular velocity ⁇ ⁇ ⁇ determined. This determination can be made on the basis of metrological results. Frequently, however, the electrical frequency of the electric machine 2 is also given, so that it is already known.
  • Spectral amplitude is in each case a measure of the deterioration of the
  • Figure 4 shows the time course of the measuring voltage U M in normal operation of the electric machine 2 and thus of the pulse inverter 3 without insulation fault.
  • the unfiltered curve is shown on the left and the curve on the right after an optional low-pass filtering of the measuring voltage U M.
  • Insulation failure that is to say a deterioration of the insulation resistance on one of the three phases U, V or W, results in a changed temporal course of the measuring voltage U M (see FIG. 6) and also an altered spectral distribution (see FIG. In particular occurs in the (1-fold) electrical
  • Deviation an unbalanced isolation error can be reliably detected.
  • the magnitude amplitude change that is in this case the so
  • Amplitude value A-i itself is a measure of the deterioration of the
  • Insulation resistance In this case, as with the subsequent detection of insulation faults, it is of course also possible to specify a minimum value for the deviation which must be exceeded before an insulation fault is detected.
  • FIGS. 8 and 9 show the time profile of the measuring voltage U M or the resulting spectral distribution when a symmetrical insulation fault occurs in the 3-phase network 1. This affects the
  • the increase in magnitude is a measure of the deterioration of the insulation resistance.
  • an auxiliary voltage U H can also be calculated with the aid of a calculation unit not shown separately, which then determines the voltage fluctuation of the supply voltage potentials T +, T- of the DC voltage intermediate circuit 6 against the reference potential
  • the calculation unit can be integrated in the control unit 9 or, alternatively, be implemented as an independent unit.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inverter Devices (AREA)

Abstract

La présente invention concerne un montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre, le réseau comprenant un circuit intermédiaire à tension continue (6), un réseau à n phases (1) comprenant un récepteur électrique à n phases (2) où n ≥ 3, et au moins un onduleur (3) connecté au circuit intermédiaire à tension continue (6) et destiné à commander le récepteur électrique (2). Selon l'invention, un point central (P1) est prévu, au niveau duquel les phases (U, V, W) du réseau à n phases (1) se rejoignent par l'intermédiaire d'impédances (Z1, Z2, Z3). En outre, un dispositif de mesure (19) est prévu pour mesurer une tension de mesure (UM) au niveau du point central (P1) par rapport à un potentiel de référence, la tension de mesure (UM) représentant la variation de tension des potentiels de tension d'alimentation (Τ+, T-) du circuit intermédiaire à tension continue (6) vis-à-vis du potentiel de référence.
PCT/EP2011/056662 2010-06-15 2011-04-27 Montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre WO2011157469A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010030133.7 2010-06-15
DE102010030133A DE102010030133A1 (de) 2010-06-15 2010-06-15 Schaltungsanordnung zur Bestimmung einer Spannungsschwankung von Leiterpotentialen in einem ungeerdeten elektrischen Netz

Publications (1)

Publication Number Publication Date
WO2011157469A1 true WO2011157469A1 (fr) 2011-12-22

Family

ID=44269283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/056662 WO2011157469A1 (fr) 2010-06-15 2011-04-27 Montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre

Country Status (2)

Country Link
DE (1) DE102010030133A1 (fr)
WO (1) WO2011157469A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014016076A1 (de) 2014-10-29 2015-08-13 Audi Ag DC/DC-Wandler für ein Kraftfahrzeug
CN107894544B (zh) * 2017-11-16 2019-11-26 广东电网有限责任公司佛山供电局 一种区域直流地电位波动源的定位方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397728B (de) * 1990-12-28 1994-06-27 Elin Energieanwendung Anordnung zur erfassung eines erdschlusses bei einem stromrichter
US5483167A (en) * 1992-09-08 1996-01-09 Mitsubishi Denki Kabushiki Kaisha Computer controlled ground detecting method for inverter unit and apparatus therefor
DE10327140A1 (de) * 2003-06-17 2005-01-05 Daimlerchrysler Ag Verfahren zum Betreiben einer elektrischen Maschine
US20050280422A1 (en) * 2004-06-18 2005-12-22 Kokusan Denki Co., Ltd. Electric leakage detection system
DE102006031663B3 (de) 2006-07-08 2007-11-15 Semikron Elektronik Gmbh & Co. Kg Verfahren zur Messung des Isolationswiderstands in einem IT-Netz
EP1909369A2 (fr) 2006-10-06 2008-04-09 Schmidhauser AG Agencement de commutation et procédé de surveillance d'isolation pour des applications de convertisseur en fonctionnement
DE102008042390A1 (de) * 2008-09-26 2010-04-01 Zf Friedrichshafen Ag Verfahren zur Diagnose von Fehlerzuständen einer im Stern gewickelten Drehfeldmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397728B (de) * 1990-12-28 1994-06-27 Elin Energieanwendung Anordnung zur erfassung eines erdschlusses bei einem stromrichter
US5483167A (en) * 1992-09-08 1996-01-09 Mitsubishi Denki Kabushiki Kaisha Computer controlled ground detecting method for inverter unit and apparatus therefor
DE10327140A1 (de) * 2003-06-17 2005-01-05 Daimlerchrysler Ag Verfahren zum Betreiben einer elektrischen Maschine
US20050280422A1 (en) * 2004-06-18 2005-12-22 Kokusan Denki Co., Ltd. Electric leakage detection system
DE102006031663B3 (de) 2006-07-08 2007-11-15 Semikron Elektronik Gmbh & Co. Kg Verfahren zur Messung des Isolationswiderstands in einem IT-Netz
EP1909369A2 (fr) 2006-10-06 2008-04-09 Schmidhauser AG Agencement de commutation et procédé de surveillance d'isolation pour des applications de convertisseur en fonctionnement
DE102008042390A1 (de) * 2008-09-26 2010-04-01 Zf Friedrichshafen Ag Verfahren zur Diagnose von Fehlerzuständen einer im Stern gewickelten Drehfeldmaschine

Also Published As

Publication number Publication date
DE102010030133A1 (de) 2011-12-15

Similar Documents

Publication Publication Date Title
WO2011157468A1 (fr) Procédé et dispositif pour surveiller la résistance d'isolation dans un réseau électrique non mis à la terre
EP1876455A1 (fr) Procédé destiné à la mesure de la résistance d'isolement dans un réseau IT
DE102010010042A1 (de) System und Verfahren zum Detektieren eines Isolationsverlusts während des Betriebes eines AC-Motors
DE102015106069A1 (de) Elektrische Motoransteuerungsvorrichtung
EP3278448B1 (fr) Procédé et dispositif d'estimation d'un courant efficace d'un condensateur de circuit intermédiaire pour un onduleur
WO2011157472A1 (fr) Montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre
DE102010061933A1 (de) Verfahren zum Nachweis eines Kabelbruchs eines Motors
WO2015022231A1 (fr) Procédé et dispositif permettant de déterminer les courants de phase et un courant d'excitation d'un moteur électrique, ainsi que système de moteur
DE102012215811A1 (de) Wechselrichter zum Ansteuern eines elektrischen Verbrauchers und Verfahren zum Betreiben eines Wechselrichters
EP3909104A1 (fr) Dispositif de commande électronique muni d'une protection contre les courts-circuits, servant à l'activation d'un moteur électrique d'une direction électromécanique d'un véhicule à moteur
DE102021100922B4 (de) Verfahren zur Ermittlung eines einen Gleichstrom in einem Inverter beschreibenden Gleitstromwerts, Inverteranordnung und Kraftfahrzeug
EP3188924B1 (fr) Procédé et dispositif de surveillance d'un réseau électrique dans un véhicule ferroviaire et véhicule ferroviaire
EP2309282B1 (fr) Procédé de détection des fautes lors de la commande d'un moteur à champ rotatif
WO2011157470A1 (fr) Montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre
WO2011157469A1 (fr) Montage pour déterminer une variation de tension de potentiels de conducteur dans un réseau électrique non mis à la terre
EP3609032B1 (fr) Procédé de détection d'une erreur de phase de moteur sur un dispositif moteur et circuit d'entraînement permettant d'entraîner un moteur à commutation électronique
EP3058381B1 (fr) Procédé de mesure de tensions d'alimentation d'un consommateur et consommateur
DE4228973A1 (de) Verfahren und Einrichtung zur Messung elektrischer Größen, insbesondere des Stroms, an einem frequenzumformergesteuerten Elektromotor
EP4096079A1 (fr) Agencement d'essai fonctionnel des condensateurs d'un dispositif filtre d'un véhicule
WO2017089065A1 (fr) Procédé de détection d'une défaillance dans un groupe générateur
DE102015003446A1 (de) Versorgung eines Kraftfahrzeugs mit Spannungsprüfung
DE102017217865A1 (de) Überwachung der für eine Strommessung an einer elektrischen Spule erforderlichen Messkomponenten
WO2020011329A1 (fr) Circuit d'entraînement et procédé pour faire fonctionner un circuit d'entraînement
DE102012220843A1 (de) Diagnose einer Drehfeldmaschine
DE102017211219A1 (de) Verfahren und Vorrichtung zum Betreiben einer elektrischen Maschine, insbesondere eines Lenkunterstützungsantriebs

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11716275

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 11716275

Country of ref document: EP

Kind code of ref document: A1