Electric Power Quality and Lighting (part 2)

Electric Power Quality and Lighting Continued from first part: Electric Power Quality and Lighting (part 1)What is power factor?Power factor is a measure of how effectively a device converts input current and voltage into useful electric power. Mathematically it is defined as follows:Power factor triangle Where P is active power and S is the apparent power.It is often confused with:Where P1 is active power od the fundamental and S1 is apparent power of it.cosφ concerns exclusively with the fundamental frequency and therefore differs from power factor when harmonics are present in the installation. It describes the combined effects of current THD and reactive power from phase displacement. A device with a power factor of unity (1.

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