Analysis for Higher Voltage at Downstream Node, Negative Line Loss and Active and Reactive Components of Capacitor Current, and Impact of Harmonic Resonance

In a study, it was found that the voltage at the downstream node is higher than the voltage at the upstream node, even though all the current flows from the upstream node to the downstream node. In IEEE ’ s load flow simulation results for the 13-bus system, 34-bus system, and 123-bus system, it was also found that line losses in some feeders are nega- tive. In this chapter, it has been analyzed how higher voltage at the downstream node and negative line losses in a phase appear in an AC power system. It has also been demon- strated that even though a capacitor generates only reactive power, its current has both active and reactive components with respect to the system reference. Finally the impact of harmonic resonance on capacitor has been discussed.