Definition
A complex number (or rotating vector) representing the magnitude and phase angle of a sinusoidal electrical quantity — voltage or current — in steady-state AC analysis. By expressing 60 Hz sinusoids as phasors with magnitude and angle, engineers replace differential equations with algebraic complex-number equations, enabling efficient power flow and fault analysis across large networks. The phase angle difference between voltage phasors at two buses is directly proportional to the real power flowing between them, making phasor measurement units (PMUs) critical tools for real-time grid state estimation and stability monitoring.
Topic Deck
Electrical Engineering Fundamentals
Source
FERC Pro Forma OATT / LGIP