Method and device for control of a series-compensated converter

Details Method and device for control of a series-compensated converter Method and device for control of a series-compensated converter

1995-10-03

1997-12-02

Wong, Peter S.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 51, H02J 336

Patent

active

056943067

ABSTRACT:
Control equipment (CE1) generates an ordered value (AOL) of a control angle (.alpha.) in dependence on a limiting signal (AMINL, AMAXL), capable of being influenced, for a converter included in a series-compensated converter station. A calculating value (AFIRL) of a control angle is calculated continuously according to a predetermined relationship (H'1, H'2) which at least approximately imitates a relationship according to which, at a firing voltage (Ufir) for the valves of the converter equal to a preselected value (Uvref), said control angle is a function (G'0) of a current (Id1) and a voltage (Un1) in the converter station and the limiting signal is formed in dependence on the calculating value. (FIG. 5 )

REFERENCES:
patent: 4210956 (1980-07-01), Watanabe
patent: 4264951 (1981-04-01), Konishi et al.
patent: 4459492 (1984-07-01), Rogowsky
patent: 4672519 (1987-06-01), Liss
A Technical Assessment of Artificial Commutation of HVDC Converters with Series Capacitors; Reeve et al.; IEEE Trans Pwr App/Systems; vol. Pas-87, No. 10; Oct. 68; pp. 1830-1840.
Power Transmission by Direct Current; Uhlmann; Springer-Verlag Berlin Heidelberg New York 1975 pp. Preface + 124-132.
High Power Electronics HVDC and SVC; Ekstrom; Royal Institute of Technology; Jun. 1990; pp. 7-13-7-16.

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