Definition
The property of a conductor that opposes the flow of electric current and converts electrical energy to heat, measured in ohms (Ω). In transmission lines, resistance causes real power losses (I²R losses) that increase with line length and current magnitude, representing a fundamental energy cost of moving power across distances. These Transmission Losses appear in ATC calculations and as the loss component of locational marginal pricing (LMP). Transmission lines are designed to minimize resistance by using large-diameter, high-conductivity aluminum or ACSR conductors, and by increasing operating voltage to reduce current for a given power transfer level.
Topic Deck
Electrical Engineering Fundamentals
Source
FERC Pro Forma OATT / LGIP