Method of taking a pole of a high-voltage d-c transmission stati

Details Method of taking a pole of a high-voltage d-c transmission stati Method of taking a pole of a high-voltage d-c transmission stati

1978-03-16

1980-04-29

Shoop, William M.

Electric power conversion systems

Current conversion

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

363 51, H02M 540

Patent

active

042009073

ABSTRACT:
Method of taking a pole of high-voltage d-c transmission system (HVDCTS) out of service, having a rectifier station connected to a first three-phase network and an inverter station connected to a second three-phase network, two d-c lines connected from one station to the other, each station being divided into halves, the station halves of each station being connected together on one side to a station center grounding electrode, the other side of each station being connectible to the positive d-c line so as to form a positive pole, and to the negative d-c line so as to form a negative pole, and residual-current switching means for taking a pole out of service, which includes grounding the station pole through a pole grounding switch which is spaced from the station center grounding electrode, and subsequently commutating a partial fault current of other poles, occurring from the pole being taken out of service, into the station center grounding electrode by the residual-current switch in the form of a circuit breaker.

REFERENCES:
patent: 3629685 (1971-12-01), Johansson
patent: 3952210 (1976-04-01), Kanngiesser
patent: 3968419 (1976-07-01), Ekstrom
Article from ETZ-A, vol. 89, No. 8/9, HGUe, pp. 4-10, 1968.
ETZ-A, vol. 97, No. 7, pp. 407-411, 1976.
Cigre', "Specification of HUDC Circuit-Breakers for Different System Applications", J. P. Bowles & L. Vaughan, 13-09, pp. 1-13, 1976.

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