FI119212B - Jordfelsskydd för frekvensomvandlare - Google Patents

Jordfelsskydd för frekvensomvandlare Download PDF

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Publication number
FI119212B
FI119212B FI20065805A FI20065805A FI119212B FI 119212 B FI119212 B FI 119212B FI 20065805 A FI20065805 A FI 20065805A FI 20065805 A FI20065805 A FI 20065805A FI 119212 B FI119212 B FI 119212B
Authority
FI
Finland
Prior art keywords
current
phase
output
earth fault
drive
Prior art date
Application number
FI20065805A
Other languages
English (en)
Finnish (fi)
Other versions
FI20065805A0 (sv
FI20065805A (sv
Inventor
Ora Veli-Matti Leppaenen
Original Assignee
Abb Oy
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 Abb Oy filed Critical Abb Oy
Priority to FI20065805A priority Critical patent/FI119212B/sv
Publication of FI20065805A0 publication Critical patent/FI20065805A0/sv
Priority to US12/000,525 priority patent/US7663850B2/en
Priority to EP07150003.7A priority patent/EP1933440B1/en
Publication of FI20065805A publication Critical patent/FI20065805A/sv
Application granted granted Critical
Publication of FI119212B publication Critical patent/FI119212B/sv

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0856—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load characterised by the protection measure taken
    • H02H7/0858—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load characterised by the protection measure taken by reversing, cycling or reducing the power supply to the motor
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1216—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for AC-AC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Control Of Ac Motors In General (AREA)

Claims (8)

1. Förfarande i samband med en frekvensomvandlare, vilken fre-kvensomvandlare omfattar utfaser och kopplingsanordningar för utfasema, vil-ka utfaser är kopplade att mata en belastning, och i vilken frekvensomvandla- 5 res huvudströmkrets en gemensammodinduktans är anordnad, kanne-tecknat av att förfarandet omfattar ett steg, där man i händelse av jordfel modulerar kopplingsanordningama i utfasen som uppvisar jordfel, sa att ifrä-gavarande stegs genomsnittliga potential motsvarar jordpotentialen.
2. Förfarande enligt patentkrav 1,kännetecknat av att modu-10 leringen av utfasema omfattar steg, i vilka storleken pä summan av frekvensomvandlarens utfasers strömmar bestäms, och summan av frekvensomvandlarens utfasers strömmar styrs till noll.
3. Förfarande enligt patentkrav 2, kännetecknat av att storle-15 ken pä summan av utfasernas strömmar bestäms genom mätning av respekti- ve utfas Ström separat.
4. Förfarande enligt patentkrav 2 eller 3, kännetecknat av att summan av frekvensomvandlarens utfasers strömmar styrs tili noll med re-spektive utfas strömregulatorer, varvid summan av ströminstruktionerna som 20 dessa fär är noll. • · **·! ί
5. Förfarande enligt patentkrav 1,kännetecknat av att modu- ·*· leringen av utfasema omfattar steg, i vilka • · ί.ν en jordfelssituation och en utfas som uppvisar jordfel detekteras, : :*: och Ml · 25 spänningen för utfasen som uppvisar jordfel styrs tili ett pulsförhal- 1. lande pa 50 %. Ml
6. Förfarande enligt patentkrav 5, kännetecknat av att detek-teringen av jordfelssituationen omfattar steg, i vilka • · · frekvensomvandlarens huvudströmkrets gemensammodström be-'*:** 30 stäms, och !.i.! en gemensammodströmkomponent detekteras i huvudströmkretsen.
7. Förfarande enligt patentkrav 6, kännetecknat av att ge- ,·!·. mensammodströmmen detekteras genom bestämning av summaströmmen för • · * frekvensomvandlarens ingäng, frekvensomvandlarens mellankrets eller frek-***** 35 vensomvandlarens utgang med ett strömmätorgan. 9 119212
8. Förfarande enligt patentkrav 5, 6 eller 7, kännetecknat av att utfasen som uppvisar jordfel detekteras genom mätning av respektive fas gemensammodspänning. • « « · · * « t «·« · ··· • · • · • •v • · • tl • · · • · • * • · * • · · • M · • * * • · · • · · ··· • · • * ··· • · • · · • · « • · ··· • · « f ··· * • · · • · * ·«· ··· • · • * ·«· ··· Φ · · • · · 1 • · • · ···
FI20065805A 2006-12-14 2006-12-14 Jordfelsskydd för frekvensomvandlare FI119212B (sv)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI20065805A FI119212B (sv) 2006-12-14 2006-12-14 Jordfelsskydd för frekvensomvandlare
US12/000,525 US7663850B2 (en) 2006-12-14 2007-12-13 Earth fault protection of a frequency converter
EP07150003.7A EP1933440B1 (en) 2006-12-14 2007-12-13 Earth fault protection of a frequency converter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20065805 2006-12-14
FI20065805A FI119212B (sv) 2006-12-14 2006-12-14 Jordfelsskydd för frekvensomvandlare

Publications (3)

Publication Number Publication Date
FI20065805A0 FI20065805A0 (sv) 2006-12-14
FI20065805A FI20065805A (sv) 2008-06-15
FI119212B true FI119212B (sv) 2008-08-29

Family

ID=37623821

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20065805A FI119212B (sv) 2006-12-14 2006-12-14 Jordfelsskydd för frekvensomvandlare

Country Status (3)

Country Link
US (1) US7663850B2 (sv)
EP (1) EP1933440B1 (sv)
FI (1) FI119212B (sv)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7944068B2 (en) * 2008-06-30 2011-05-17 General Electric Company Optimizing converter protection for wind turbine generators
US20100091419A1 (en) * 2008-10-15 2010-04-15 Vedula Sastry V Motor drive ground fault detection
FI124174B (sv) * 2010-05-03 2014-04-15 Vacon Oyj Mätning av jordfelsström
EP2568557B1 (de) * 2011-09-07 2014-02-26 Siemens Aktiengesellschaft Verfahren zum Betreiben eines Fehlerstromschutzschalters sowie Fehlerstromschutzschalter für einen Frequenzumrichter
US9160161B2 (en) 2012-05-04 2015-10-13 Eaton Corporation System and method for ground fault detection and protection in adjustable speed drives
EP3300202A1 (de) * 2016-09-27 2018-03-28 Siemens Aktiengesellschaft Verfahren zur vermeidung eines gefährlichen erdfehlerstroms höherer frequenz für ein elektrisches antriebssystem
WO2024061473A1 (en) 2022-09-23 2024-03-28 Hitachi Energy Ltd Method for detecting earth faults and frequency converter system with earth fault detection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128961C1 (en) * 1991-08-29 1992-08-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De Detecting short circuit to earth in pulse inverter - using square wave HF voltage source in evaluation circuit to operate protection circuit when toroidal transformer saturates
JP3180828B2 (ja) 1991-11-06 2001-06-25 富士電機株式会社 インバータの電流検出回路
JPH0698482A (ja) * 1992-06-10 1994-04-08 Digital Equip Corp <Dec> 電力供給装置
US5444333A (en) * 1993-05-26 1995-08-22 Lights Of America, Inc. Electronic ballast circuit for a fluorescent light
US5877926A (en) * 1997-10-10 1999-03-02 Moisin; Mihail S. Common mode ground fault signal detection circuit
JP2000116144A (ja) 1998-09-30 2000-04-21 Yaskawa Electric Corp インバータ装置
US6381110B1 (en) * 2000-03-06 2002-04-30 General Motors Corporation Method and apparatus for detecting isolation faults in motor/inverter systems
KR100566437B1 (ko) 2003-11-11 2006-03-31 엘에스산전 주식회사 위상천이를 이용한 인버터 고장 검출 장치 및 방법
CN100550562C (zh) 2004-12-27 2009-10-14 丹福斯驱动器公司 用于检测电动机控制器中的接地故障条件的方法
KR101322316B1 (ko) * 2007-05-10 2013-10-25 엘지전자 주식회사 냉장고용 모터의 기동제어장치 및 방법

Also Published As

Publication number Publication date
EP1933440A2 (en) 2008-06-18
EP1933440B1 (en) 2016-04-20
FI20065805A0 (sv) 2006-12-14
US7663850B2 (en) 2010-02-16
FI20065805A (sv) 2008-06-15
EP1933440A3 (en) 2012-11-21
US20080151445A1 (en) 2008-06-26

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