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Long distance HVDC lines carrying hydroelectricity from Canada's Nelson River to this converter station where it is converted to AC for use in southern Manitoba's grid. A high-voltage direct current (HVDC) electric power transmission system uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. [1]
This makes voltage-source converters much easier to connect into a Multi-terminal HVDC system or "DC Grid". [27] HVDC systems based on voltage-source converters normally use the six-pulse connection because the converter produces much less harmonic distortion than a comparable LCC and the twelve-pulse connection is unnecessary.
In February 2022, Hitachi Energy started the process of installing HVDC equipment at Kergord. [14] Installation of the subsea cable started in July 2022. [15] In April 2022, the project was described as "on track to be completed by 2024". [16] The subsea cable installation is ongoing, and expected to continue until 2023. [13]
Supplier: ABB; One of the World's biggest Multi-terminal HVDC system with Ultra High Voltage DC Transmission system (UHVDC) [45] CASA-1000: Tajikistan - Sangtuda: Pakistan - Nowshera: 750: 500: 1300: 2025: Thyr: ±500 kV Bipole HVDC with Converter Stations [46] [47] India–Sri Lanka HVDC Interconnection: Madurai - India Anurathapura - Sri ...
450kV HVDC line (at right), on south side of Autoroute 20 east of the Nicolet station near Sainte-Eulalie, Quebec.. The Quebec – New England Transmission (officially known in Quebec as the Réseau multiterminal à courant continu (RMCC) [1] and also known as Phase I / Phase II [2] and the Radisson - Nicolet - Des Cantons circuit, [3] and known in New England as the Northern Pass) is a long ...
HVDC electrodes are also used in some monopolar HVDC systems, for example the Italy–Corsica–Sardinia scheme. [4] In such systems the electrode line permanently carries the same current as the high-voltage conductor; however since the ground current is then only unidirectional, one of the electrodes (the cathode) can be of simpler design ...
In a typical electrical grid, the basics of the voltage control are provided by the synchronous generators. These generators are equipped with automatic voltage regulators that adjust the excitation field keeping the voltage at the generator's terminals within the target range. [7]
It is unusual, having more than two converter stations as part of a single HVDC system, and (as of 2012) is one of only two multi-terminal HVDC systems in operation in the world (the other multi-terminal scheme being the Quebec – New England Transmission system linking northeastern United States with Quebec in Canada).