DE3785340D1 - Schaltkreis zum schutz vor wirklastverschiebung und verfahren dazu. - Google Patents

Schaltkreis zum schutz vor wirklastverschiebung und verfahren dazu.

Info

Publication number
DE3785340D1
DE3785340D1 DE8787310543T DE3785340T DE3785340D1 DE 3785340 D1 DE3785340 D1 DE 3785340D1 DE 8787310543 T DE8787310543 T DE 8787310543T DE 3785340 T DE3785340 T DE 3785340T DE 3785340 D1 DE3785340 D1 DE 3785340D1
Authority
DE
Germany
Prior art keywords
circuit
protection against
active load
load shifting
against active
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.)
Expired - Fee Related
Application number
DE8787310543T
Other languages
English (en)
Other versions
DE3785340T2 (de
Inventor
Donal Eugene Baker
Mirza Akmal Beg
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.)
Sundstrand Corp
Original Assignee
Sundstrand Corp
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 Sundstrand Corp filed Critical Sundstrand Corp
Application granted granted Critical
Publication of DE3785340D1 publication Critical patent/DE3785340D1/de
Publication of DE3785340T2 publication Critical patent/DE3785340T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • H02H7/06—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 generators; for synchronous capacitors
    • H02H7/062—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 generators; for synchronous capacitors for parallel connected generators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Protection Of Static Devices (AREA)
DE8787310543T 1986-12-05 1987-11-30 Schaltkreis zum schutz vor wirklastverschiebung und verfahren dazu. Expired - Fee Related DE3785340T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/938,702 US4731690A (en) 1986-12-05 1986-12-05 Real load unbalance protection system for parallel variable speed constant frequency electrical power systems

Publications (2)

Publication Number Publication Date
DE3785340D1 true DE3785340D1 (de) 1993-05-13
DE3785340T2 DE3785340T2 (de) 1993-07-15

Family

ID=25471823

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787310543T Expired - Fee Related DE3785340T2 (de) 1986-12-05 1987-11-30 Schaltkreis zum schutz vor wirklastverschiebung und verfahren dazu.

Country Status (4)

Country Link
US (1) US4731690A (de)
EP (1) EP0288642B1 (de)
JP (1) JPS63190523A (de)
DE (1) DE3785340T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4847723A (en) * 1988-05-20 1989-07-11 Westinghouse Electric Corp. Volt-per-hertz protection apparatus
US4905117A (en) * 1988-09-02 1990-02-27 Westinghouse Electric Corp. Circuit and method for DC content protection of parallel VSCF power systems
US4905134A (en) * 1988-12-29 1990-02-27 Sundstrand Corporation Paralleling method and control for a VSCF system
US4937462A (en) * 1989-01-23 1990-06-26 Sundstrand Corporation No break power transfer control for a VSCF power generating system
US5355024A (en) * 1993-03-11 1994-10-11 Hobart Brothers Company Solid state frequency converter capable of misaligned parallel operation
WO2010111451A2 (en) * 2009-03-27 2010-09-30 Aclara Power-Line Systems Inc. Under frequency/under voltage detection in a demand response unit

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294976A (en) * 1964-02-27 1966-12-27 Westinghouse Electric Corp Unbalanced load detection in alternating current systems
US3381205A (en) * 1965-09-14 1968-04-30 Westinghouse Electric Corp Phase shift regulated electrical inverter system
US3539820A (en) * 1968-01-10 1970-11-10 Westinghouse Electric Corp Real load unbalance protection circuit for alternating current power sources connected for parallel operation
US3683199A (en) * 1970-09-14 1972-08-08 Westinghouse Electric Corp Over-{11 and underexcitation protection circuit for alternating current power systems
US3846693A (en) * 1973-10-16 1974-11-05 Avionic Instr Inc Selectively switched, malfunction-responsive three phase and parallel logic box for plural static inverters
US3879670A (en) * 1974-04-11 1975-04-22 Westinghouse Electric Corp Synchronous demodulator circuit
AT345393B (de) * 1976-04-22 1978-09-11 Siemens Ag Oesterreich Elektronische schaltungsanordnung zum parallelschalten von wechselstromnetzen
US4173774A (en) * 1977-12-08 1979-11-06 Westinghouse Electric Corp. Parallel AC electrical system with differential protection immune to high current through faults
US4276590A (en) * 1979-04-30 1981-06-30 The Perkin-Elmer Corporation Current sharing modular power system
SE418555B (sv) * 1979-09-07 1981-06-09 Asea Ab Minneskrets for releskydd
US4520319A (en) * 1982-09-30 1985-05-28 Westinghouse Electric Corp. Electronic phase detector having an output which is proportional to the phase difference between two data signals
US4510399A (en) * 1982-10-07 1985-04-09 Westinghouse Electric Corp. Demodulator circuit for parallel AC power systems

Also Published As

Publication number Publication date
DE3785340T2 (de) 1993-07-15
EP0288642A2 (de) 1988-11-02
EP0288642B1 (de) 1993-04-07
US4731690A (en) 1988-03-15
EP0288642A3 (en) 1989-12-06
JPS63190523A (ja) 1988-08-08

Similar Documents

Publication Publication Date Title
DE3686801D1 (de) Feinstbearbeitungsvorrichtung und verfahren.
DE3579533D1 (de) Module zum stuetzen von waenden und dergleichen.
DE68901201D1 (de) Verfahren und vorrichtung zum desodorieren von toilettenraeumen.
DE3787818D1 (de) Anordnung und Verfahren zur Paketerzeugung.
DE3771110D1 (de) Verfahren und geraet zum gruppieren von gegenstaenden.
DE3775348D1 (de) Befestigungsmittel und verfahren zum anbringen desselben an plattenfoermiges material.
NO874322D0 (no) Fremgangsmaate og innretning for aa fjerne nedsenkede plattformer.
DE68912762D1 (de) Phasenkonjugiertes verstärkersystem und verfahren, mit vier durchfgängen.
DE68912037D1 (de) Baugerät und Bauverfahren.
DE3769686D1 (de) Verfahren und vorrichtung zum beeinflussen der laenge und des maschenbildes von strickstuecken.
DE3482627D1 (de) Orthogonale transformation und geraet zu ihrer durchfuehrung.
DE68904276D1 (de) Verfahren zum desodorieren und desodorisierungskatalysator.
DE3784111D1 (de) Verfahren und geraet zum testen von wandlern.
DE69205217D1 (de) Vorrichtung und Verfahren zum Zusammenbau von Schaltungsstrukturen.
DE3782382D1 (de) Vorrichtung und verfahren zum zerteilen von schlacke.
DE3481251D1 (de) Kontaktstift und verfahren zu seiner befestigung.
DE58908722D1 (de) Verfahren und Anordnung zum Einstellen von Kommunikationsdiensten.
DE3579929D1 (de) Halbleiterlaser und verfahren zu dessen fabrikation.
DE3583955D1 (de) Verfahren und geraet zum nachweis von biologisch aktiven agenzien.
DE3873843D1 (de) Verfahren zum zusammenbau von batterien und geraet.
DE68918617D1 (de) Elektrochemischer Fühler und Verfahren.
DE3763019D1 (de) Verfahren und einrichtung zum weich- oder hartloeten.
DE3785340D1 (de) Schaltkreis zum schutz vor wirklastverschiebung und verfahren dazu.
DE3778486D1 (de) Halbleiterlaser und verfahren zu dessen fabrikation.
DE68923307D1 (de) Rechnernetzwerk und Verfahren zum Betreiben desselben.

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee