Definition of power components in the presence of distorted waveforms using time domain technique

Conventional design of capacitors for power factor correction at any bus in a system is based on the fundamental component of reactive power. In case of nonsinusoidal situations the conventional method for designing these capacitors does not give the expected power factor at a certain bus due to harmonic distortion and resonance. The authors review the power components in the time domain. These components are active, reactive and residual power. The authors also show that designing capacitors for power factor correction should be based on an accurate method for calculating reactive power in the presence of harmonics and distortion