Power line communication method

In an electric power transmission network, comprising several substations interconnected by power transmission lines, a communication device of a substation communicates over a power transmission line to a communication device of a neighboring substation by using command signals (A, B, C, D) in a fr...

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Bibliographic Details
Main Author SPIESS, HERMANN
Format Patent
LanguageEnglish
French
German
Published 31.10.2007
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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Summary:In an electric power transmission network, comprising several substations interconnected by power transmission lines, a communication device of a substation communicates over a power transmission line to a communication device of a neighboring substation by using command signals (A, B, C, D) in a frequency band (F) and a guard signal (G) located in a first half (F2) of the frequency band (F). For successive lines, a repeating sequence of different schemes (a1, b1) of command signals (A, B, C, D) is used, each of the schemes (a1, b1) comprising only command signals (A, B, C, D) with frequencies located in a second half of the frequency band (F1). By using a repeating sequence of different schemes (a1, b1) for successive lines and by using in each of the schemes (a1, b1) only command signals (A, B, C, D) with frequencies located in one half of the reserved frequency band, it is possible to reduce the number of different frequency bands required in electric power transmission networks for transmitting command signals (A, B, C, D) used for coding (tele-) protection commands.
Bibliography:Application Number: EP20060405185