Method and apparatus to operate a high-voltage DC transmission s

Details Method and apparatus to operate a high-voltage DC transmission s Method and apparatus to operate a high-voltage DC transmission s

1985-02-28

1987-03-03

Salce, Patrick R.

Electric power conversion systems

Current conversion

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

363 49, 363 51, H02J 336

Patent

active

046480188

ABSTRACT:
In a first station operating as the rectifier, a fault indication quantity can replace the measured value of the HVDC voltage which regulates a control voltage. In normal operation in a second station of an HVDC transmission system operating as an inverter, a fault indication quantity is calculated from a control angle and the inductive D.C. voltage drop is calculated from the D.C. current and the A.C. voltage. In the second station operating as the inverter, the overlap angle can be precalculated from a fault indication quantity so that by automatic control of the control angle a preset extinction angle can be assured. Thereby stable, quickly controllable operation without any remote control signals is assured and rapid resumption of operation following a malfunction facilitated.

REFERENCES:
patent: 3648147 (1972-03-01), Leete
patent: 4250542 (1981-02-01), Bulakhov et al.
patent: 4263517 (1981-04-01), Konishi
patent: 4429357 (1984-01-01), Hausler et al.
patent: 4516198 (1985-05-01), Liss

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