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Paper Information

Title: 

FERRO RESONANCE IN DISTRIBUTION SYSTEMS AND ITS EFFECT ON ZNO ARRESTERS

Type: PAPER
Author(s): FARSHAD MOHAMMAD,SADEH JAVAD
 
 
 
Name of Seminar: INTERNATIONAL POWER SYSTEM CONFRENCE
Type of Seminar:  CONFERENCE
Sponsor:  SHERKATE TAVANIR
Date:  2004Volume 19
 
 
Abstract: 

FERRO RESONANCE PHENOMENON CAN OCCUR AT ANY VOLTAGE LEVEL OF THE POWER SYSTEMS. OCCURRENCE OF FERRO RESONANCE PHENOMENON IN POWER DISTRIBUTION SYSTEMS IS MORE POSSIBLE, BECAUSE OF EXISTENCE OF CABLE WITH CAPACITIVE EFFECT, TRANSFORMER WITH SATURABLE CORE AND SINGLE PHASE PROTECTION LIKE FUSES. IN DISTRIBUTION SYSTEMS DURATION OF FERRO RESONANCE CAN BE LONG. USUALLY, IN DISTRIBUTION SYSTEMS ZNO ARRESTERS WILL BE USED AT 20KV SIDE TO PROTECT THE TRANSFORMER AGAINST LIGHTENING. WHEN FERRO RESONANCE PHENOMENON OCCURS, LEAKAGE CURRENTS FLOW THROUGH THE ZNO ARRESTER. IN THIS SITUATION, ONE OF THE MOST IMPORTANT FEATURES OF ZNO ARRESTERS IS THERMAL CAPACITY. IN THIS PAPER, BASED ON THE ENERGY ABSORPTION CAPABILITY CURVES FOR A GIVEN AVERAGE CURRENT DENSITY, THE AMOUNT OF ENERGY THAT THE ZNO ARRESTER CAN BE ABSORBED ARE OBTAINED AND TIME TO FAILURE OF THE ARRESTER ESTIMATED.

 
Keyword(s): FERRO RESONANCE, DISTRIBUTION SYSTEMS, ZNO ARRESTER, THERMAL DAMAGE
 
 
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