METHOD OF PERFORMING CIRCUIT OPENING AND CLOSING OPERATION, COMPUTER PROGRAM, CONTROL SYSTEM AND POWER SYSTEM

A method of performing a circuit opening and closing operation in a power system (16a; 16b) comprising three phases (L1-L3), a three-phase transformer (20a; 20b), and a circuit breaker system (18), the method comprising a) opening all three phases simultaneously such that a reference current (I1-I3)...

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Bibliographic Details
Main Authors LINDELL, Elisabeth, HALEN, Stefan
Format Patent
LanguageEnglish
French
German
Published 02.10.2024
Subjects
BASIC ELECTRIC ELEMENTS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
EMERGENCY PROTECTIVE DEVICES
GENERATION
RELAYS
SELECTORS
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Summary:A method of performing a circuit opening and closing operation in a power system (16a; 16b) comprising three phases (L1-L3), a three-phase transformer (20a; 20b), and a circuit breaker system (18), the method comprising a) opening all three phases simultaneously such that a reference current (I1-I3) of a reference phase is interrupted first at a first current zero crossing (42, 44) after the opening; and b) closing all three phases simultaneously at a phase to ground voltage (Vpg) of the phase lagging the reference phase by 120°, in a time range (Ci) of ±90° from a negative peak (46) of said phase to ground voltage if the current zero crossing is a positive current zero crossing, or in a time range (C2) of ±90° from a positive peak (48) of said phase to ground voltage if the current zero crossing is a negative current zero crossing.
Bibliography:Application Number: EP20230164524