EP2625537A2 - Bloc d'alimentation électrique et système d'alimentation électrique comprenant ce bloc d'alimentation électrique - Google Patents

Bloc d'alimentation électrique et système d'alimentation électrique comprenant ce bloc d'alimentation électrique

Info

Publication number
EP2625537A2
EP2625537A2 EP11784954.7A EP11784954A EP2625537A2 EP 2625537 A2 EP2625537 A2 EP 2625537A2 EP 11784954 A EP11784954 A EP 11784954A EP 2625537 A2 EP2625537 A2 EP 2625537A2
Authority
EP
European Patent Office
Prior art keywords
power supply
control
interface
detection
regulating device
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Withdrawn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
EP11784954.7A
Other languages
German (de)
English (en)
Inventor
Gerhard Wolff
Christoph Leifer
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.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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 Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP2625537A2 publication Critical patent/EP2625537A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
    • H02H5/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection responsive to deterioration or interruption of earth connection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • G01R31/40—Testing power supplies

Definitions

  • the invention relates to a power supply device with a control and / or regulating device, a modespotenzialan- connection, at least one voltage potential terminal and a ground terminal for grounding the Stromchucksge ⁇ device.
  • the invention further relates to a power supply system with a power supply device.
  • Such a power supply device is known, for example, as a central power supply device for a power grid or other circuit of a system.
  • the STEU ⁇ ER and / or regulating device is used primarily to control or regulation of a parameter of the power supply means (for example, the voltage).
  • the Machinery Directive stipulates, among other things, that a first insulation fault must already be detected in the control system of a machine or plant and must not lead to faulty behavior of the machine or system.
  • a typical first mistake is, for example, the fraying of a sensor cable.
  • Place in the cabinet is grounded to reference potential, for example, ground, lying line of the control system.
  • reference potential for example, ground
  • the control-own line protection is triggered.
  • the machine or system is switched off in this way immediately after the occurrence of the insulation fault and thus protected against misconduct.
  • the current caused by the insulation fault can flow through the closed circuit in the presence of a connection between the reference potential of the controller and ground.
  • the safety devices of the control system are triggered by professional dimensioning.
  • a permanent insulation monitoring is al ⁇ ternatively carried out.
  • a "first" insulation fault of active signal lines is detected and can be reported.
  • the operation is not interrupted unscheduled.There is time for troubleshooting.This operating state after a first insulation fault corresponds to a system with grounded reference potential.Also a second insulation fault of the opposite potential leads to an immediate shutdown.
  • the state of the art is that within the power supply system, ie the circuit of the system, differential current measuring devices are available that compare incoming and outgoing currents. Divergent values of the incoming and outgoing currents mean that leakage flows and a first error is present.
  • insulation monitors which monitor in a non-single-ended, grounded insulated control system between the power supply and the earth, whether the plant-specific minimum insulation values are maintained or whether a decrease in the insulation resistance is observed.
  • the invention is therefore based on the object to provide a power ⁇ supply device and a power supply system that enables the detection of non-operating currents in the power grid reliably and easily.
  • the power supply device includes a per ⁇ manent or shiftable device internal short circuit current path between the reference potential terminal and a ground connection, a detection device for continuous loan or quasi-continuously detecting a current flowing through the short circuit current path current and a Sig ⁇ nalübertragungspfad on which the detection device with the Control and / or regulating means signal technology connects.
  • the reference potential connection and the ground connection of the power supply unit are - as of course also the voltage potential connection - external connections of the device. These two connections are electrically connected to each other via a permanent or switchable short-circuit current path.
  • the current flowing through this short-circuit current path can be detected by means of the detection device, wherein a signal proportional to this current can be transmitted to the control and / or regulating device of the device. The latter can thus monitor the power supply network supplied by the power supply unit to external currents entering via the grounding connection into the first conduction path.
  • the short-circuit current path is a switchable
  • the detection device is an all-current sensitive Detekti ⁇ onsvorraum with a dynamic of continuous or quasi-continuous detection, which comprises a frequency range from 0 Hz to at least 1 MHz.
  • high-frequency extraneous currents in the power supply device supplied power network can be detected.
  • Such high-frequency parasitic currents caused mostly by Lei ⁇ processing capacity and / or device capabilities of the lines and / or the comparable switched by means of these lines in the power grid electrical devices with respect to the ground potential at different locations.
  • the power supply device furthermore has at least one further detection device for the continuous or quasi-continuous detection of a current flowing through the reference potential connection and / or voltage potential connection. Preference is there ⁇ at the further detection device also has a
  • All-current-sensitive detection device whose dynamics comprise a frequency range from 0 Hz to 20 kHz, preferably from 0 Hz to 100 kHz.
  • the further detection device is signal-technically connected to the control and / or regulating device by means of a further signal transmission path.
  • control and / or regulating device continuously or quasi-continuously monitors the temporal correlation between the current detected in the short-circuit current path and the detected current flowing through the voltage potential terminal. Through this monitoring, the control and / or regulating device can distinguish the effects of operational current and / or voltage peaks from actual external currents.
  • the power supply unit at least one comprising interface technically connected to the control and / or regulating device.
  • the control and / or regulating device can take over control and monitoring functions within the power supply network / circuit supplied by the power supply device.
  • the control and / or regulating device can signally via the interface with a higher instance of the power grid or the installation and / or Steue ⁇ assurance systems of the power grid-connected electrical appliances such as electric machines are connected.
  • the at least one interface is designed as an analog interface and / or digital interface. If the interface is a digital interface, provision is made in particular for this digital interface to be designed as an RS232, RS485 and / or RS422 interface.
  • the control and / or regulating device continuously or quasi-continuously monitors the temporal correlation between the current detected in the short-circuit current path and signals from the interface. Even with this monitoring, the control and / or regulating device can distinguish the effects of operational current and / or voltage peaks from actual external currents.
  • the control and / or regulating device is designed as a microprocessor. The detection or monitoring can be implemented particularly easily in a control and / or regulating device designed as a microprocessor. In particular, it is envisaged that the microprocessor will be responsible for the Signal transmission required analog-to-digital converter
  • control and / or regulating device compares the detected or monitored actual values with desired values.
  • the power supply device has at least one output device which is signal-technically connected to the control and / or regulating device.
  • the output device can, for example, an acoustic output device for outputting a warning sound, a visual output device such as ei ⁇ ne warning lamp or a display, or other interface ⁇ imagine be to signal output to another device.
  • the invention further relates to a power supply system having an aforementioned power supply unit and a power grid having at least two line paths and at least one electrical device, wherein the electrical device is supplied with power from the power supply unit via the line paths.
  • a STEU ⁇ er Center the electrical device and / or a control and / or regulating device of the power system is connected by signal technology via the interface with the control and / or regulating device.
  • the control and / or regulating device of the power grid is, in particular, a control unit of the electrical device and the control and / or regulating unit. is the higher-level instance of the power supply unit.
  • the figure shows a power supply system 10 with a central electrical power supply device 12 for feeding electrical power into a power grid 14 of the power supply system 10.
  • a plurality of electrical devices 16 are interconnected (of which, however, only ei ⁇ nes is shown). These electrical appliances 16 will be powered by the power supply 12.
  • the power grid 14 is designed as a DC power grid 14 and has two line paths 18, 20.
  • the first conductive path 18 a as a negative potential ( "minus potential”) is trained reference potential cpl and is located on the second conductive path 20 a opposite the clutchspo ⁇ tential cpl higher potential ( "positive potential”) cp2 for Ge ⁇ nerieren an operating current through the power grid 14 at.
  • the power grid 14 is thus a power grid 14 driven by a constant voltage.
  • the power supply unit 12 has, in addition to the control and / or regulating device 22 for controlling or regulating a power supply device 24 designed as a converter, three external connections 26, 28, 30 electrically connected to this device.
  • One of the at ⁇ connections is a pre Schlos ⁇ sener to the first conduction path 18 reference potential terminal 26
  • another of the at ⁇ connections is a CONNECTED to the second conduction path 20 sener voltage potential terminal 28 and another of the terminals is a ground terminal 30 for grounding the
  • This ground terminal 30 is connected via a grounding current path 32 at a location with ground potential. Inside the device, the outer connections 26, 28, 30 are connected to corresponding outputs of the power supply device 24 via corresponding current paths 34, 36, 38.
  • the control and / or regulating device 22 of the power supply unit is - as with modern control and / or regulating devices ⁇ usual - as a microcontroller ( ⁇ ) is formed.
  • This microcontroller has, in addition to the processor and working and program memory and preferably also Periphe ⁇ rieajien such as analog-to-digital converter and / or digital to analog converter. By means of these peripheral units, the microcontroller can communicate with other units inside or outside the power supply unit 12.
  • the power supply unit 12 also has a switchable device-internal short-circuit current path 40 between the reference potential terminal 26 and the ground terminal 30.
  • a switch 42 is arranged for this, which is designed as a controllable by the control and / or regulating device 22 switch device.
  • the power supply unit 12 comprises a detection device 44 for the continuous or quasi-continuous detection of a current flowing through the short-circuit current path 40. This detection device 44 is signally connected by a signal transfer path 46 to the presentation of a ⁇ About this current signal characterizing the control and / or regulating device 22nd
  • the power supply unit 12 has one or two further detection devices (s) 48 for the continuous or quasi-continuous detection of a current flowing through the reference potential terminal 26 and / or the voltage potential terminal 28.
  • This further Detekti ⁇ onsvoriques 48 is signally connected by an associated signal transmission path 50 for transmitting a signal characterizing this current to the control and / or regulating device 22nd
  • the power supply unit 12 (at least) on one with the control and / or regulating device 22 by means of a signal transmission path 52 signal technically connected interface 54.
  • the control and / or regulating device 22 can take over control and monitoring functions within the power network 14 supplied by the power supply unit 12.
  • the control and / or regulating device 22 signal technology via the interface 54 with a higher authority of the power network 14 or the system and / or with control systems (the controllers 56) of the interconnected in the power grid 14 electrical equipment 16, such as electrical machines, to be connected.
  • the power supply device 12 shown in FIG. 1 has an output device 58 that is signal-connected to the control and / or regulating device 22. This is designed as a display.
  • a monitoring of the insulation state of the entire power supply system 10 in particular monitoring hnote ⁇ lich of multiple earthing in the power grid 14 or in terms of a "first system error" in the power grid 14 by fault currents through the ground wire ( AC / DC insulation measurement, eg differential current).
  • the first conducting path 18 to the reference potential cpl is connected not only via the series circuit of short circuit current path 40 and ground current path 32, but also the not pre-provided ⁇ short circuit 60 to ground at the other location.
  • the different points of the ground potential are in turn electrically connected to each other via a (specific) earth resistance 62, so that an external current circuit 64, a so-called ground loop, is produced.
  • the external current circuit 64 happens while the short circuit current path 40.
  • the detection device 44 determines the determined short circuit current path 40 by current flowing the Ge ⁇ total current of the third current circuit 64th If the detection device 44 is designed to be all-current-sensitive, the detection also includes the detection of capacitive multiple earthing. Typical applications are all machines and plants in accordance with the Machinery Directive, which is also used internationally. Likewise in areas where personal protection is involved or where systems are isolated.
  • the power supply 12 is thus suitable in the fed ⁇ th power supply system 10 preventive non-operating currents (eg the external current circuit shown 64) to recognize and provide a higher-level monitoring system, a control room or a control in the form of a message.
  • non-operating currents eg the external current circuit shown 64
  • the power supply device 12 includes the Detektionsvor- direction in a short-circuit current path 40 at least mitchanenden connecting line between the printerspotenti- terminal connector 26 (for example, negative pole of a DC supply) and the end connected to the earth ground terminal 30, so that all Strö ⁇ me are recognized by this line and for the diagnosis can be evaluated.
  • the power supply can provide current comparison in isolated networks. To be compared
  • Additional detection devices 44, 48 can be permanently installed in the device 12, alternatively, to ⁇ additionally required detection means 44, 48 are retrofitted as an option.
  • the presented power supply unit 12 contributes significantly to optimizing the system availability and commissioning ent ⁇ speaking power supply systems 10 professional and EMC aspects. It ensures a significantly higher availability of the systems and leads to enormous savings during commissioning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Keying Circuit Devices (AREA)

Abstract

L'invention concerne un bloc d'alimentation électrique (12) comprenant un dispositif de commande et/ou de régulation (22), une borne de potentiel de référence (26), au moins une borne de potentiel de tension (28) et une borne de mise à la terre (30) pour relier le bloc d'alimentation électrique (12) à la terre. Selon l'invention, le bloc d'alimentation électrique présente un chemin de courant de court-circuit (40) interne permanent ou raccordable entre la borne de potentiel de référence (26) et la borne de mise à la terre (30), un dispositif de détection (44) pour détecter en continu ou quasiment en continu un courant circulant dans le chemin de courant de court-circuit (40), ainsi qu'un chemin de transmission de signaux (46) qui relie le dispositif de détection (44) au dispositif de commande et/ou de régulation (22) pour permettre la transmission de signaux. L'invention concerne en outre un système d'alimentation électrique (10) correspondant.
EP11784954.7A 2010-10-05 2011-10-05 Bloc d'alimentation électrique et système d'alimentation électrique comprenant ce bloc d'alimentation électrique Withdrawn EP2625537A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010037995.6A DE102010037995B4 (de) 2010-10-05 2010-10-05 Stromversorgungsgerät und Stromversorgungssystem mit ebensolchem
PCT/EP2011/067412 WO2012045788A2 (fr) 2010-10-05 2011-10-05 Bloc d'alimentation électrique et système d'alimentation électrique comprenant ce bloc d'alimentation électrique

Publications (1)

Publication Number Publication Date
EP2625537A2 true EP2625537A2 (fr) 2013-08-14

Family

ID=44999736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11784954.7A Withdrawn EP2625537A2 (fr) 2010-10-05 2011-10-05 Bloc d'alimentation électrique et système d'alimentation électrique comprenant ce bloc d'alimentation électrique

Country Status (5)

Country Link
US (1) US20140035369A9 (fr)
EP (1) EP2625537A2 (fr)
CN (1) CN103270425B (fr)
DE (1) DE102010037995B4 (fr)
WO (1) WO2012045788A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014223287A1 (de) * 2014-11-14 2016-05-19 Bender Gmbh & Co. Kg Elektrische Schutzeinrichtung und Verfahren zur selektiven Abschaltung eines Subsystems bei einem zweiten Fehler in einem IT-Stromversorgungssystem
KR102716926B1 (ko) * 2016-12-26 2024-10-11 엘지디스플레이 주식회사 터치 스크린 일체형 표시장치
CN109142873B (zh) * 2018-08-28 2020-08-28 中铁十二局集团有限公司 一种轨道交通直流供电系统全回路直流电阻测试方法
CN112798036B (zh) * 2021-04-13 2021-07-02 立臻科技(昆山)有限公司 一种基于短接触发的测试装置及就位检测方法

Citations (1)

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EP0679898A2 (fr) * 1994-04-30 1995-11-02 Canon Kabushiki Kaisha Procédé de mesure de l'état d'isolation pour un système décentralisé générateur de puissance

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JPH09275632A (ja) * 1996-04-04 1997-10-21 Harness Sogo Gijutsu Kenkyusho:Kk 電力分配システム
JP3763852B2 (ja) * 1997-06-17 2006-04-05 ディプロム−インジェニエール ヴァルター ベンダー ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 交流電源における絶縁および障害電流の監視方法および監視回路
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JP4473294B2 (ja) * 2007-09-05 2010-06-02 矢崎総業株式会社 電源制御装置
EP2230522B1 (fr) * 2009-03-16 2011-05-11 SMA Solar Technology AG Procédé et dispositif de surveillance d'isolation d'un réseau isolé terre
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EP0679898A2 (fr) * 1994-04-30 1995-11-02 Canon Kabushiki Kaisha Procédé de mesure de l'état d'isolation pour un système décentralisé générateur de puissance

Also Published As

Publication number Publication date
CN103270425A (zh) 2013-08-28
US20140035369A9 (en) 2014-02-06
DE102010037995A1 (de) 2012-04-05
DE102010037995B4 (de) 2015-07-02
WO2012045788A2 (fr) 2012-04-12
CN103270425B (zh) 2016-05-04
US20130234514A1 (en) 2013-09-12
WO2012045788A3 (fr) 2013-03-28

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