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The bus distributes power to distribution lines, which fan out to customers. Urban distribution is mainly underground, sometimes in common utility ducts . Rural distribution is mostly above ground with utility poles , and suburban distribution is a mix. [ 1 ]
An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy along large distances. It consists of one or more conductors (commonly multiples of three) suspended by towers or poles .
This line comprises the North-South interconnect, at the time one of the world's largest power systems. The masts of this line were designed for eventual upgrade to 380 kV. However the first transmission at 380 kV in Germany was on October 5, 1957 between the substations in Rommerskirchen and Ludwigsburg–Hoheneck.
In general, however, an HVDC power line will interconnect two AC regions of the power-distribution grid. Machinery to convert between AC and DC power adds a considerable cost in power transmission. The conversion from AC to DC is known as rectification, and from DC to AC as inversion. Above a certain break-even distance (about 50 km; 31 mi for ...
The Energy Policy Act of 1992 required transmission line owners to allow electric generation companies open access to their network [3] [4] and led to a restructuring of how the electric industry operated in an effort to create competition in power generation. No longer were electric utilities built as vertical monopolies, where generation ...
The invention of a practical, efficient transformer made AC power distribution feasible; a system using distribution transformers was demonstrated as early as 1882. [2] If mounted on a utility pole, they are called pole-mount transformers. Suppose the distribution lines are located at ground level or underground.
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