Power Factor Correction
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Transcript of Power Factor Correction
Reasons behind P.F correctionsReasons behind P.F corrections
Power Factor is the ratio between Power and Apparent Power
Motors
Power Factor ImprovementPower Factor Improvement
Over Correction Individual power factor correction
Motor or Inductive Load
Power Factor Correction Capacitor
Motor Control Switch
Power Factor ImprovementPower Factor Improvement
Group power factor correction
Distribution Panel #1
Distribution Panel #2
Distribution Panel #3Power Factor
Correction Capacitors
Capacitor Control Switches
Benefits of Power Factor Benefits of Power Factor CorrectionCorrection
Reduce electrical costs.
Reduce load losses of the distribution system. I²R Loss
Increase the system's capacity.
Maintain a better voltage regulation on the system.
Improves P.F.
Rules for P.F Calculations Rules for P.F Calculations
Power input in a load is what the utility see as load
P= KW or W
RulesRules
Cal. All Power Values @ original P.F 1Cal. All Power Values @ original P.F 1stst
SSmm PPmm QQmm
Cal. All Power Values @ New P.F (corrected p.f)Cal. All Power Values @ New P.F (corrected p.f) Using Pm – Using Pm – constantconstant SScorcor and Q and Qcorcor or Delivered or Delivered
RulesRules
Find the Qreq or the Q of the cap required to correct Find the Qreq or the Q of the cap required to correct the P.Fthe P.F
QQcapcap = Q = Qm m - Q- Qcorcor
Cal Size of Cap’s Xc valueCal Size of Cap’s Xc value Xc = EXc = E²/Qcap²/Qcap
RulesRules
Cal the Cap size to μF Cal the Cap size to μF C=1 x 10C=1 x 106 6 / 2 / 2пп f Xc f Xc
Assume 60 HzAssume 60 Hz