Title :
A comparison of alternative HVDC converter schemes
Author :
Al-Dhalaan, S.M.
Author_Institution :
Gen. Org. for Tech. Educ. & Vocational Training, Riyadh, Saudi Arabia
Abstract :
In this paper, two different HVDC converters are compared with a conventional design. The first scheme has bridges modified by the addition of auxiliary (by-pass) valves and the second scheme uses series bridges of unequal rating. Self-commutated devices are used in both the alternative configurations. The nonconventional schemes have several advantages, mainly: (a) a significant reduction of the reactive voltampere absorption; (b) the transformer tap-changer is no longer required and (c) a reduction in the harmonic content of the AC supply. However, at the present time these schemes do not appear to offer a viable challenge in terms of cost to the conventional converter arrangement but developments in the solid state technology may change the scenario
Keywords :
HVDC power convertors; bridge circuits; commutation; thyristor convertors; AC supply; HVDC converter schemes; auxiliary valves; by-pass valves; harmonic content reduction; reactive voltampere absorption reduction; series bridges; solid state technology; transformer tap-changer; Absorption; Bridge circuits; Current transformers; HVDC transmission; Pulse width modulation; Reactive power; Solid state circuits; Thyristors; Valves; Voltage control;
Conference_Titel :
Electrical and Computer Engineering, 2001. Canadian Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-6715-4
DOI :
10.1109/CCECE.2001.933714
