Converter system for coupling two high voltage three-phase netwo

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

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363 68, 363144, H02J 336

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active

048169803

ABSTRACT:
The converter system couples two high voltage three-phase networks. Two converter transformers are associated with each network to be coupled. Each transformer has secondary windings. One secondary winding associated with a first network is Y-connected while the other is delta-connected. The converter transformers operate on a three-phase full wave rectifier with twelve semiconductor rectifier components. The arrangement of valve towers, a stacking of semiconductor components, is designed to keep a base area or a so-called valve housing in which the valve towers are accommodated as small as possible. The semiconductor components are arranged in uniform modular assemblies and may be stacked as modular components having insulating spacings between components which are also uniform. A tower of uniform modules is formed in association with each of the phases of the three-phase secondary windings of the converter transformers. The number of modules defines the number of stories of the tower. The number of modules is varied in accordance with the desired power throughput. The system provides DC short couplers for asynchronous networks of different powers while uitilizing the same basic design concept so that a power match can be made by a corresponding number of modules forming a tower with the same insulating spacings in a standardized design.

REFERENCES:
patent: 3889175 (1975-06-01), Isogai et al.
patent: 4583158 (1986-04-01), Ikekame et al.
patent: 4618923 (1986-10-01), Meisel et al.
patent: 4691274 (1987-09-01), Matouk et al.

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