I working in large power plant connected with three arc furnace. here implimented load shedding scheme 1) with grid low frequency( & time delay) major load disconnected at 33 kv level like ruffing & finishing mill motors & eaf, in this case still we are conntected with power system network...
FOR PF IMPROVEMENT FROM 0.95 TO 0.99 FOR 1700 KW LOAD AROUND REACTIVE POWER TO BE REQUIRED 242.23 KVAR. MY SUGGESTION IS GO THROUGH SATAIC VAR COMPANSATOR FOR INDUCTIVE FURNACE ( ITS COSTLY ) OTHER SOLUTATION FIX CAPACIOR BANK INSTALLED IN 11 KV SIDE ( BRAEKER COST ALSO INCRESED ITS RATING 2...
FIRST CALCULATE REACTIVE POWER TO BE REQUIRED FOR IMPROVING
POWER FACTOR FROM 0.95 TO 0.99 FOR 1700 KW LOAD. @ 242.23 KVAR REQUIRED FOR .99 PF FOR 1700 KW. MY SUGGESTION IS FOR HIGH VOLTAGE CAPACITOR BANK TO FIX CAPACITOR & TRY INSTALLED ON LT SIDE BECAUSE FURNACE ACTIVE & REACTIVE LOAD ALWAYS...
DEAR DEEVEEYES, BASICALLY HARMONICS GENRATED DUE TO AC TO DC CONVERSION & DUE TO DC OFF SET COMPENENT. MEASURE HARMONICS LEVEL ON AC SIDE MUST BELOW < 2% THD ( VOLTAGE & CURRENT). FOR STUDY CALCULATE OVER ALL NETWORK CKT & EFFECT
WITH DIFFERENT LOAD. I WANT TO KNOW WITH OUT HARMONICS FILTER ANY...
BETTER REFFER TO VECTOR REPRESTATION OF INDUCTION MOTOR.
TIPS
1)INDUCTION MOTOR OPERATION ON LAGGING POWER FACTOR
2) INDUCTION MOTOR BASICALLY INDUCTIVE CKT
3) ANY INDUCTIVE CKT CONSUME REACTIVE POWER i.e.
CAHNGE VOLTAGE PROFILE OF THE SYSTEM.
