ABSTRACT
This chapter presents representative techniques for three-phase power flow analysis. It explains the subject of power system harmonic analysis. Power quality refers to the characteristics of the power supply required to make electrical equipment work properly. Two of the important power quality issues are the imbalance of three-phase voltages and the distortion of sinusoidal voltage waveforms in the form of harmonics. The area of power quality analysis, especially that of three-phase and harmonic power flow algorithms, has experienced significant development. The objective of three-phase power flow analysis is to determine the degree of voltage and current unbalance at the fundamental frequency. The three-phase transformer connections and the more usual configurations of unbalanced loads make easier the propagation of negative sequence component than the zero component. The three-phase power flow can be the first step of a more complex algorithm which is known as three-phase harmonic power flow.
