WO2014104982A1 - Dispositif électronique pour des disjoncteurs à courant résiduel de type b et ses dérivés - Google Patents

Dispositif électronique pour des disjoncteurs à courant résiduel de type b et ses dérivés Download PDF

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Publication number
WO2014104982A1
WO2014104982A1 PCT/SI2012/000066 SI2012000066W WO2014104982A1 WO 2014104982 A1 WO2014104982 A1 WO 2014104982A1 SI 2012000066 W SI2012000066 W SI 2012000066W WO 2014104982 A1 WO2014104982 A1 WO 2014104982A1
Authority
WO
WIPO (PCT)
Prior art keywords
currents
differential
type
current transformer
current
Prior art date
Application number
PCT/SI2012/000066
Other languages
English (en)
Inventor
Rafko BERTONCELJ
Andrej VIDENŠEK
Matjaž VERDERBER
Janez HUMAR
Original Assignee
Razvojni Center Enem Novi Materiali D.O.O.
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 Razvojni Center Enem Novi Materiali D.O.O. filed Critical Razvojni Center Enem Novi Materiali D.O.O.
Priority to PCT/SI2012/000066 priority Critical patent/WO2014104982A1/fr
Priority to EP12840871.3A priority patent/EP2936640A1/fr
Publication of WO2014104982A1 publication Critical patent/WO2014104982A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/332—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means responsive to dc component in the fault current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/38—Instruments transformers for polyphase ac
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H02H1/046—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks upon detecting saturation of current transformers

Definitions

  • the subject of the invention is an electronic device fault-current circuit breaker for differential currents of types A/AC/B/B+/B++ in RCCB switching devices, where device enables the implementation of improved methods of protective functions in comparison with the currently known methods of measurement, based on new detection procedures of constant and pulsating differential DC currents.
  • the invention belongs to the class H 02H 3/33 of the International Patent Classification.
  • RCCB switch type B is currently the only known switch on the world market, which is able to efficiently protect life and property (devices and equipment) against direct contact with the phase voltage containing DC component and provides protection against fires and injuries.
  • Built-in analog/digital electronics with its separate current transformer measures the presence of the differential currents in the power grid.
  • Siemens summation current transformer uses two windings on one core and differs significantly from the current transformer used in bur invention.
  • two magnetic cores for the detection of the differential currents of type A and B are used and are also physically separated, as if they were in the Siemens patent windings (2) and (3) separated, but are not. Physical separation of these two cores and windings provides significant advantages in the detection of fault-currents type B and possibility for detection type B derivative fault-currents (B+ and B++).
  • the Siemens patent document WO 2010/018057 A1 defines detection circuit of breaker that detects differential currents through the voltage drop in the secondary winding/coil of the current transformer.
  • Our invention doesn't detect the voltage drop in the secondary winding of the current transformer but forms PWM frequency modulated signal based on secondary coil current. Information it's converted into time domain where it is possible to accurately perform the evaluation information about fault- current occurrence.
  • Siemens has defined the procedure for triggering protective residual current circuit breakers, which includes summation transformer and evaluation circuit, which significantly differs from our invention.
  • Siemens process defines square wave pulse generator which output vary to the values that temporal change in current, which is induced by a square wave pulse in 5 the secondary winding (30) for the duration of a square wave pulse and/or pause between two orthogonal pulses each time has a predetermined value. On the basis of this information residual current is evaluated.
  • the amount of rectangular pulses it's fixed and not adjustable also the induced current as a basis to generate a PWM signal i o every second changes the shape or/and amplitude.
  • Device defines current transformer 3 for detection of differential currents type B with core which is separated from the core of the current transformer 1 for the detection of current flow types A and AC.
  • the device assume core and summation current transformer 3 through which wiring from primary side of current transformer 1 is conducted and contains a separate secondary windings on transformer 3, which is completely separated (galvanic and electrical) of the secondary winding on current transformer 1.
  • microcontroller 6 implements an algorithm to detect the differential current flows as well as the realization of additional advanced features of the circuit breaker. Microcontroller 6 allows upgrade of functionality from type B current detection to type B+ (detection of differential currents up to 20KHz) and type B++ (detection of differential currents up to 1 MHz) and performs functionality of selectivity and time delay mode.
  • Current transformer 1 and detection device 2 assume some already well-known technical solutions and procedures.
  • Current transformer 1 of voltage independent RCCB type A performs measuring of electrical currents, through which at least two electrical conductors are leaded on the primary side winding, which must be monitored.
  • the unit 2 detects the differential voltage-independent currents in the RCCB type A and is linked to tripping relay 8 and to microcontroller 6 for evaluation. Tripping relay 8 and switch 9 to break at least one of the primary conductors are also not a subject of invention.
  • Current transformer 3 captures differential currents through a separate core and primary and secondary windings on it, in a way to detect differential fault-current types B/B+/B++ based on IEC 62423, VDE 0664- 110 working standard and VDE 0664-400.
  • Current Transformer 3 provides the core current transformer or Summary by which we keep all raw water from the core / current transformer current transformer ratio 1 for the detection of the differential currents type A / AC and contains a separate secondary windings, which is completely separate (galvanic and electrical) of the secondary winding of the current transformer third
  • Amplifier 4 and device 5 allow separate capture and processing of differential currents type A/AC and type B/B+/B++ providing information on fault-current type B/B+/B++ to microcontroller 6, which carries switching off on one or more network lines via a switch 9.
  • Amplifier 4 is connected to the output of the current transformer 3 for detection of the differential currents of type B/B+/B++, through which the primary side winding at least two electrical conductors are passed, where is necessary to control the occurrence of differential currents.
  • Current transformer secondary winding 3, together with the amplifier device 4 and 5 constitute a serial device oscillation circuit, which generates a PWM modulated square wave signal, where the period is at least twice smaller than the differential current period.
  • an amplifier 4 is added to the secondary winding of current transformer 3, which own oscillating signal from tuned device 5 amplifies and controls the power current transformer secondary winding 3.
  • PWM modulated signal from the device 5 leads to the microcontroller 6 for the detection and evaluation.
  • Microcontroller 6 evaluates changes in modulated PWM signal of the serial oscillation circuit, which is directly dependent on the primary differential current on transformer 3, and based on predefined value with a threshold criterion, decides about the next step, affecting the state of tripping relays 8.
  • Figure 2 shows the process flow diagram in microcontroller 6 for PWM signal analysis, where in the device 5 a PWM time-modulated signal is formed from predefined properties of RL oscillator, which carries full information about the differential detection of fault-currents types B/B+/B++. Analysis procedure in the microcontroller 6 allows accurate measurement of pulse/pause changes on PWM signal device 5 and a unique decoding of time information about fault-currents.
  • Procedure in microcontroller 6 distinguishes two operating modes, irregular and a regular way.
  • the invention also includes the implementation of new units, which are:

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

La présente invention porte sur un dispositif électronique destiné à des disjoncteurs à courant résiduel de types A/AC/B/B+/B++. Le dispositif selon l'invention permet de mettre en œuvre des procédés de fonctions protectrices perfectionnés par rapport aux procédés de mesure actuellement connus, grâce aux nouvelles procédures de détection de courants de défaut différentiels CC constants et pulsatoires. Le dispositif utilise un transformateur de courant (3) destiné à détecter des courants différentiels de type B/B+/B++ dont le noyau est séparé du noyau du transformateur de courant (1), destiné à détecter des courants de type A/AC. Le dispositif utilise également un transformateur de courant (3) sommateur à noyau, à travers lequel sont conduits tous les conducteurs primaires de transformateurs de courant (1) pour détecter des courants différentiels de type A/AC et contient un enroulement de bobine secondaire distinct, complètement séparé (galvaniquement et électriquement) de la bobine secondaire du transformateur de courant (1).
PCT/SI2012/000066 2012-12-24 2012-12-24 Dispositif électronique pour des disjoncteurs à courant résiduel de type b et ses dérivés WO2014104982A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SI2012/000066 WO2014104982A1 (fr) 2012-12-24 2012-12-24 Dispositif électronique pour des disjoncteurs à courant résiduel de type b et ses dérivés
EP12840871.3A EP2936640A1 (fr) 2012-12-24 2012-12-24 Dispositif électronique pour des disjoncteurs à courant résiduel de type b et ses dérivés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SI2012/000066 WO2014104982A1 (fr) 2012-12-24 2012-12-24 Dispositif électronique pour des disjoncteurs à courant résiduel de type b et ses dérivés

Publications (1)

Publication Number Publication Date
WO2014104982A1 true WO2014104982A1 (fr) 2014-07-03

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Country Status (2)

Country Link
EP (1) EP2936640A1 (fr)
WO (1) WO2014104982A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2527892A (en) * 2014-07-04 2016-01-06 Siemens Ag Residual current protection apparatus with detection which is purely dependent on the power supply system voltage.
WO2017093670A1 (fr) * 2015-12-03 2017-06-08 Hager-Electro Sas (Société Par Actions Simplifiée) Dispositif de protection différentielle du type b ou b+ comportant deux modules en parallèle et en concurrence
CN111781418A (zh) * 2020-06-22 2020-10-16 北京智芯微电子科技有限公司 低压配电网剩余电流监测方法、设备及系统
RU2782150C2 (ru) * 2017-08-11 2022-10-21 Лаки Пауэр Ехф. Система генерирования выходной мощности и соответствующее применение

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29705030U1 (de) * 1997-03-19 1998-07-23 Siemens AG, 80333 München Fehlerstromschutzschalter für Allstrom
DE19755857A1 (de) * 1997-12-16 1999-06-17 Siemens Ag Differenzstromschutzeinrichtung mit einer Transduktorschaltung
DE102005007334B4 (de) 2005-02-17 2007-02-08 Siemens Ag Summenstromwandler zur allstromsensitiven Erfassung eines elektrischen Differenzstromes
DE10215019B4 (de) 2002-04-05 2007-05-16 Doepke Schaltgeraete Gmbh & Co Vorrichtung zum Erfassen von elektrischen Differenzströmen
WO2010018058A1 (fr) 2008-08-14 2010-02-18 Siemens Aktiengesellschaft Procédé de fonctionnement d'un disjoncteur pour courant de fuite et disjoncteur pour courant de fuite
WO2010018057A1 (fr) 2008-08-14 2010-02-18 Siemens Aktiengesellschaft Appareil de détection de courant de fuite
WO2012130846A1 (fr) * 2011-04-01 2012-10-04 Eaton Industries (Austria) Gmbh Disjoncteur à courant de défaut

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29705030U1 (de) * 1997-03-19 1998-07-23 Siemens AG, 80333 München Fehlerstromschutzschalter für Allstrom
DE19755857A1 (de) * 1997-12-16 1999-06-17 Siemens Ag Differenzstromschutzeinrichtung mit einer Transduktorschaltung
DE10215019B4 (de) 2002-04-05 2007-05-16 Doepke Schaltgeraete Gmbh & Co Vorrichtung zum Erfassen von elektrischen Differenzströmen
DE102005007334B4 (de) 2005-02-17 2007-02-08 Siemens Ag Summenstromwandler zur allstromsensitiven Erfassung eines elektrischen Differenzstromes
WO2010018058A1 (fr) 2008-08-14 2010-02-18 Siemens Aktiengesellschaft Procédé de fonctionnement d'un disjoncteur pour courant de fuite et disjoncteur pour courant de fuite
WO2010018057A1 (fr) 2008-08-14 2010-02-18 Siemens Aktiengesellschaft Appareil de détection de courant de fuite
WO2012130846A1 (fr) * 2011-04-01 2012-10-04 Eaton Industries (Austria) Gmbh Disjoncteur à courant de défaut

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2527892A (en) * 2014-07-04 2016-01-06 Siemens Ag Residual current protection apparatus with detection which is purely dependent on the power supply system voltage.
GB2527892B (en) * 2014-07-04 2021-09-08 Siemens Ag Residual current protection apparatus with detection which is purely dependent on the power supply system voltage.
WO2017093670A1 (fr) * 2015-12-03 2017-06-08 Hager-Electro Sas (Société Par Actions Simplifiée) Dispositif de protection différentielle du type b ou b+ comportant deux modules en parallèle et en concurrence
FR3044836A1 (fr) * 2015-12-03 2017-06-09 Hager-Electro Sas Dispositif de protection differentielle du type b ou b+ comportant deux modules en parallele et en concurrence
RU2782150C2 (ru) * 2017-08-11 2022-10-21 Лаки Пауэр Ехф. Система генерирования выходной мощности и соответствующее применение
CN111781418A (zh) * 2020-06-22 2020-10-16 北京智芯微电子科技有限公司 低压配电网剩余电流监测方法、设备及系统
CN111781418B (zh) * 2020-06-22 2023-10-10 北京智芯微电子科技有限公司 低压配电网剩余电流监测方法、设备及系统

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