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Title: Scheme for rapid adjustment of network impedance

Abstract

A static controlled reactance device is inserted in series with an AC electric power transmission line to adjust its transfer impedance. An inductor (reactor) is serially connected with two back-to-back connected thyristors which control the conduction period and hence the effective reactance of the inductor. Additional reactive elements are provided in parallel with the thyristor controlled reactor to filter harmonics and to obtain required range of variable reactance. Alternatively, the static controlled reactance device discussed above may be connected to the secondary winding of a series transformer having its primary winding connected in series to the transmission line. In a three phase transmission system, the controlled reactance device may be connected in delta configuration on the secondary side of the series transformer to eliminate triplen harmonics.

Inventors:
 [1]
  1. (3814 NE. 136th Pl., Portland, OR 97230)
Issue Date:
Research Org.:
BPA
OSTI Identifier:
867915
Patent Number(s):
5032738
Assignee:
Vithayathil; John J. (3814 NE. 136th Pl., Portland, OR 97230) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
scheme; rapid; adjustment; network; impedance; static; controlled; reactance; device; inserted; series; electric; power; transmission; line; adjust; transfer; inductor; reactor; serially; connected; back-to-back; thyristors; control; conduction; period; hence; effective; additional; reactive; elements; provided; parallel; thyristor; filter; harmonics; obtain; required; range; variable; alternatively; discussed; secondary; winding; transformer; primary; phase; delta; configuration; eliminate; triplen; secondary winding; power transmission; serially connected; electric power; transmission line; active element; active elements; primary winding; rapid adjustment; reactive elements; obtain required; thyristor controlled; reactive element; /307/323/

Citation Formats

Vithayathil, John J. Scheme for rapid adjustment of network impedance. United States: N. p., 1991. Web.
Vithayathil, John J. Scheme for rapid adjustment of network impedance. United States.
Vithayathil, John J. Tue . "Scheme for rapid adjustment of network impedance". United States. https://www.osti.gov/servlets/purl/867915.
@article{osti_867915,
title = {Scheme for rapid adjustment of network impedance},
author = {Vithayathil, John J.},
abstractNote = {A static controlled reactance device is inserted in series with an AC electric power transmission line to adjust its transfer impedance. An inductor (reactor) is serially connected with two back-to-back connected thyristors which control the conduction period and hence the effective reactance of the inductor. Additional reactive elements are provided in parallel with the thyristor controlled reactor to filter harmonics and to obtain required range of variable reactance. Alternatively, the static controlled reactance device discussed above may be connected to the secondary winding of a series transformer having its primary winding connected in series to the transmission line. In a three phase transmission system, the controlled reactance device may be connected in delta configuration on the secondary side of the series transformer to eliminate triplen harmonics.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

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