Paper Information

Title: 

EFFICACY OF CLOSING RESISTOR AT FINITING VFTO IN IPC TRANSFORMER WINDINGS

Type: PAPER
Author(s): HOSSEINI S.M.H.,GHRAPATIAN G.B.,VAHIDI B.
 
 
 
Name of Seminar: INTERNATIONAL POWER SYSTEM CONFRENCE
Type of Seminar:  CONFERENCE
Sponsor:  SHERKATE TAVANIR
Date:  2004Volume 19
 
 
Abstract: 

DURING FAST & VERY FAST TRANSIENT OVERVOLTAGES (VFTOS) DUE TO LIGHTNING, SWITCHING AND OTHER DISTURBANCES (SUCH AS SHORT-CIRCUIT OR CONNECTED NOLOAD TRANSFORMER WITH CABLE), RESONANCE OCCURES PROBABILITY IS WITHIN TRANSFORMER WINDINGS. THE RESULT OF THIS PHENOMENA IS DANGER OVERVOLTAGES IN ALONG WINDINGS. AT CRITICAL CONDITIONS, AMPLITUDE OF THIS OVERVOLTAGES RISE TO SOME TIMES OF LIGHTNING OVERVOLTAGES, AND NORMAL PROTECTION SUCH AS ARRESTERS CANNOT PROTECT AGAINST.
AT THIS PAPER MODELING H.V TRANSFORMER WINDING OF IPC IS DONE. THIS STUDIES IS DEVELOPED BASED ON THE MULTI-CONDUCTOR TRANSMISSION LINE THEORY (MTLT) WITH MATLAB & EMTP SOFTWARE AT FREQUENCY & TIME DOMAINS. OSCILLATION FREQUENCY CALCULATED AT VERY FAST TRANSIENT.
SWITCH AND SPECIFICATIONS SUCH AS CLOSING RESISTOR AND TIME OF WORK, HAS STUDIED FOR REDUCED THAT OVERVOLTAGES. THE RESULT OF SIMULATIONS SHOWS THAT THE CLOSING RESISTOR VERY INFLUENCES AT REDUCED OVERVOLTAGE AMPLITUDES.

 
Keyword(s): TRANSFORMER, IPC, VFTO, CLOSING RESISTOR, SWITCHING
 
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