ECEN 215, Principles of Electrical EngineeringDr. Mina RahimianLecture# 15 Date: 10/16/13Sinusoidal steady state power calculationsPower is an important quantity in electric systems. Any electric device has a certain power rating within which the device operates safely.Instantaneous and average powerThe average powerPower for a purely resistive circuitNote: For a purely resistive load, power is always positive.Power for a purely inductive circuitPower for a purely capacitive circuitPower factorEx. Calculate pf, average, reactive and instantaneous powers.Power calculations in terms of the rms value in a resistor.Average power in terms of the rms values for any circuit elementReactive power in terms of rms values for any circuit elementComplex powerAlternate forms of power equationsPower triangle for three types of loadsLoad angle and Power factor
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