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Paper Information

Title: 

FEASIBILITY STUDY OF THE APPLICATION OF FAULT CURRENT LIMITER AT EXTRA-HIGH VOLTAGE SUBSTATION OF IRAN’S ELECTRIC NETWORK

Type: PAPER
Author(s): JAVADI HAMIDEH,RAHMATI IMAN,AKHAVAN ABBAS
 
 
 
Name of Seminar: INTERNATIONAL POWER SYSTEM CONFRENCE
Type of Seminar:  CONFERENCE
Sponsor:  SHERKATE TAVANIR
Date:  2004Volume 19
 
 
Abstract: 

ONE OF THE PROBLEMS RELATED TO THE GROWTH OF THE TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY SYSTEM IS THE FAST INCREASE IN THE SHORT CIRCUIT LEVEL. THIS INCREASE CAUSES THE INCREASE IN ELECTRODYNAMICS FORCES, TRANSIENT OVER VOLTAGES AND TEMPERATURE RISE OF EQUIPMENT. IT ALSO CAUSES THE DECREASE IN RELIABILITY OF ELECTRICAL NETWORK WHEN THE FAULTS OCCUR. TO SOLVE THESE PROBLEMS, IN LITERATURE, SEVERAL METHODS FOR SOLUTION OF THIS PROBLEM HAVE BEEN PROPOSED AND INTRODUCED AS THE FAULT CURRENT LIMITING DEVICES.
IN THIS PAPER, THE CLASSICAL METHODS USED FOR REDUCING FAULT CURRENT AND THE SAMPLES OF THEIR APPLICATIONS IN SEVERAL COUNTRIES IS FIRSTLY DESCRIBED. THEN, THE EXTRA HIGH VOLTAGE ELECTRICAL NETWORK OF IRAN IS ANALYZED AND THE NECESSITY OF USING FAULT CURRENT LIMIER IN IRAN’S NETWORK IS SECONDLY OBSERVED. AND FINALLY THE METHOD OF SPLITTING OF BUSES IS APPLIED TO REDUCE THE FAULT CURRENT IN HIGH VOLTAGE SUBSTATION WITH CRITICAL STATUS.

THE OBTAINED RESULTS OF SHORT CIRCUIT STUDY OF THE RECENT NETWORK OF IRAN SHOWS THE FAULT CURRENT ARE NORMALLY LESS THAN THE NOMINAL VALUE OF CIRCUIT BREAKER. BUT IN THE FUTURE NETWORKS OF IRAN CONSIDERED FOR THE YEAR 2011, THE FAULT CURRENTS INCREASE LARGELY AND THEY REACH TO MORE THAN 50 KA IN SEVERAL HIGH VOLTAGE SUBSTATION. FOR THIS CAUSE THE SINGLE AND THREE-PHASE FAULT CURRENT STUDY FOR ALL HIGH VOLTAGE SUBSTATIONS WITH THE SHORT CIRCUIT CURRENT MORE THAN 30 KA IS PRECISELY ANALYZED AND THE DISTRIBUTION OF FAULT CURRENT IS DETERMINED. FROM THIS ANALYZE IT CAN BE EVIDENTLY SEEN THAT THE PHIROUZBAHRAM HIGH VOLTAGE SUBSTATION AND SOME OTHER ONES WILL HAVE SERIOUS PROBLEM FOR INTERRUPTING THE FAULT CURRENT. IN THIS REGARD FOR REDUCING THE FAULT CURRENT, THE METHOD OF SPLITTING BUSES OF THESE SUBSTATIONS IS OBSERVED AND THE FAULT CURRENTS ARE DETERMINED. THE OBTAINED RESULTS PRESENT THAT THE FAULT CURRENT WHICH WILL BE EQUAL TO 52 KA AT PHIROUZBAHRAM HIGH VOLTAGE SUBSTATION WILL CHANGE TO 38 KA. APPLICATION OF THIS METHOD CAUSES AN IMPORTANT DECREASING IN THE FAULT CURRENT AND CAN BE EFFECTIVELY USED AFTER LOAD FLOW AND STABILITY STUDIES OF IRAN’S NETWORK.

 
Keyword(s): SHORT CIRCUIT CURRENT, FAULT CURRENT LIMITER, SPLITTING OF BUSES
 
 
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