Title :
Communicating over electric distribution lines
Author :
Robinson, Paul B.
Author_Institution :
General Electric Corp., Somersworth, NH, USA
Abstract :
Problems of remote control and metering by carrier transmission over the distribution feeders are considered. The choice of carrier frequencies by the author´s Company for compromise between characteristics of noise (harmonics) and electrical length (standing waves) is explained. Modulation, filtering, and integrate-and-dump detection methods of elimination of harmonic effects are described, with special reference to spikes from SCR-controlled variable-speed motors, and matched filtering of white noise. Propagation problems (and countermeasures) are related to power-factor-correction capacitor banks, critical electrical lengths between dwellings and substation, and distribution transformer leakage reactance.<>
Keywords :
carrier transmission on power lines; distribution networks; harmonics; magnetic leakage; matched filters; power factor correction; telecontrol; telemetering; variable speed drives; white noise; SCR-controlled variable-speed motors; carrier frequencies; critical electrical lengths; distribution feeders; distribution transformer leakage reactance; harmonic effects; integrate-and-dump detection; matched filtering; power-factor-correction capacitor banks; remote control; remote metering; spikes; white noise; Capacitors; Communication system control; Conductors; Digital modulation; Feeds; Frequency; Meter reading; Power cables; Substations; Wire;
Journal_Title :
Potentials, IEEE
