1 four-quadrant regulator, 2 stages and steps, 3 fcp system (fast computerized program) – CIRCUTOR computer SMART III-Fast Series User Manual
Page 23: 4 regulation program
4�1�-DEFINITIONS
Thissectionprovidesanumberofdefinitionsthatmaybeusefulforunderstandingtheopera-
tionoftheunit�
4�1�1 Four-quadrant regulator�
Thismeansthattheregulatoriscapableofperformingthemeasurementandregulationfunc-
tionswhentheactivepoweristransferredfromthemainstotheloads(commoncaseinacon-
sumerinstallation)orwhentheloadistransferredtothemains(inthecaseofinstallationswith
generatorsthatnotonlyallowtheconsumptionofenergy,butcanalsoexportandsellenergy)�
4�1�2 Stages and steps
Adistinctionmustbeestablishedbetweenstagesandsteps�Inthismanual,a
Stage is de-
scribedaseachgroupofcapacitorbanksintowhichthepowerfactorcompensationunitis
divided,whichmayhavedifferentpowerratings,usuallyinratiosof1:1,1:2,1:2:4,etc�
A
stepiseachoneofthetotalpowerfractions(powerofthefirststep)thatcanberegulatedby
usingstageswithdifferentweights�
4�1�3 FCP system (FAST Computerized Program)�
Thissystemcontrolstheconnectionsequenceofthevariousstages,tendingtominimisethe
numberofoperationsandtomatchtheusagetimesofthevariousstagesinordertoachieve
apre-determinedrequiredfinalpower�Theoperationsarecarriedoutsuchthat,inthecase
ofstageswithidenticalpower,thestagethathasbeendisconnectedthelongestisconnected
whenthereisdemandandthestagethathasbeenconnectedthelongestisdisconnected
whenthereisasurplus�
4�1�4 Regulation program�
Thepowerratingsofthevariousgroupsorstagesusuallyfollowcertainpatternscalled"pro-
grams”�
Theprogramindicatesthepowerratiosbetweenthevariousstages�Themostfrequentpro-
gramsare:
Program 1�1�1�1 �Allstageshavethesamepower�For example: a 100 kvar unit with 5 steps
would be made up of 5 identical 20 kvar stages, and would be described as a (5 x 20) kvar unit.
Program 1�2�2�2�Everystageafterthefirststagehastwiceasmuchpowerasthefirststage�
For example: a 180 kvar unit with 5 stages would be made up of a first 20 kvar stage and 4
identical 40 kvar stages, and would be described as a (20 + 4 x 40) kvar unit.
Program 1�2�4�4�Thesecondstagehastwiceasmuchpowerasthefirststageandthere-
mainingstagesafterthesecondstagehavefourtimesasmuchpowerasthefirststage�
For
example: a 300 kvar unit with 5 stages would be made up of a first 20 kvar stage, a second 40
kvar stage and 3 identical 80 kvar stages. It would be described as a (20 + 40 + 3 x 80) kvar
unit.
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Instruction Manual
Computer SMART III FAST