EP 0864096 A2 19980916 - PROCESS FOR PRODUCING SIGNALS IDENTIFYING FAULTY LOOPS IN A POLYPHASE ELECTRICAL POWER SUPPLY NETWORK
Title (en)
PROCESS FOR PRODUCING SIGNALS IDENTIFYING FAULTY LOOPS IN A POLYPHASE ELECTRICAL POWER SUPPLY NETWORK
Title (de)
VERFAHREN ZUM GEWINNEN VON FEHLERBEHAFTETE SCHLEIFEN IN EINEM MEHRPHASIGEN ELEKTRISCHEN ENERGIEVERSORGUNGSNETZ KENNZEICHNENDEN SIGNALEN
Title (fr)
PROCEDE DE PRODUCTION DE SIGNAUX CARACTERISANT DES BOUCLES DEFECTUEUSES DANS UN RESEAU D'ALIMENTATION ELECTRIQUE POLYPHASE
Publication
Application
Priority
- DE 9602281 W 19961122
- DE 19545267 A 19951127
Abstract (en)
[origin: DE19545267A1] The invention relates to a process for producing signals identifying faulty loops in a polyphase electrical power supply network using impedance starting, during which process the signals identifying the faulty loops are formed after checking for earth faults by comparing the amounts of the impedance values produced during impedance starting. To eliminate during said process with great reliability all the loops which are not actually faulty in spite of initial starting the invention proposes that actual faulty loops are determined while determining exclusively earth-faultless loops by comparing calculated virtual impedances (<u>U</u>Lx-Ly/<u>I</u>Lx; <u>U</u>Lx-Ly/<u>I</u>Ly) with impedances (<u>Z</u>Lx-Ly) measured during impedance starting; by determining at least one loop with earth fault, faultless phase-to-ground loops are recognised and eliminated by comparing the amounts of the virtual impedance values (<u>Z</u>VLxE) obtained from the impedance values of the phase-to-ground loops, detected as faulty, with the smallest virtual impedance values (<u>Z</u>VLxE). To use the impedance values of the other loops determined as faulty but not eliminated, examination processes (23, 24, 25) designed in various ways according to the number of simultaneously established phase-to-ground loops are used.
IPC 1-7
IPC 8 full level
G01R 27/16 (2006.01); G01R 31/08 (2006.01)
CPC (source: EP US)
G01R 27/16 (2013.01 - EP US); G01R 31/088 (2013.01 - EP US)
Citation (search report)
See references of WO 9720219A2
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 19545267 A1 19970528; DE 19545267 C2 19990408; CA 2238506 A1 19970605; CN 1078710 C 20020130; CN 1203666 A 19981230; EP 0864096 A2 19980916; US 6034592 A 20000307; WO 9720219 A2 19970605; WO 9720219 A3 19970807
DOCDB simple family (application)
DE 19545267 A 19951127; CA 2238506 A 19961122; CN 96198791 A 19961122; DE 9602281 W 19961122; EP 96946020 A 19961122; US 7733698 A 19981113