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Power Electronics and Wind Power GERTMAR Lars manufacturing like in Fig. 9. The most essential parts of a wind turbine nacelle (left) and an overview of a pulp-&-paper factory (right) are depicted.. Fig. 9: A long-term vision: Adjustable-speed drive, ASD, power electronic wind turbine generators to provide fungible power to a pulp-&-paper factory. Pictures originate from www.vestas.dk and from 2000 ABB Americas IT Conference (June 7-9, 2000, Raleigh, NC). A long-term task for all stakeholders in electric power generation, transmission & distribution is to make wind power as reliable, commercially valuable and fungible in utilization as electric power produced by the traditional (via schedule) dispatched plants. Among those plants are fossil fuel power plants, hydroelectric plants, nuclear plants and the like. Wind energy conversion will be established as a supplement to oil, gas and coal energy conversion for power generation, thus reducing dependency on those traditional fossil fuel sources and emerging biomass fuel. With carefully prepared intra- & infrastructures, e.g., principally like in Fig. 10, there is very little need for physical electro-chemical storage—like accumulator batteries or fuel-cells—to prime rough wind power into fungible electrical power in the long term. Interconnections, communication, automation (IndustrialIT, Appendix 1, and the like) as well as business agreements will form the most cost-effective solutions, [25]. WTG manufacturers and power utilities should jointly think in the way: “A large wind farm is a power plant”. A main long-term issue is then to develop intra-structures, like the mechanical drive-trains, in the wind turbines, WTs, and to develop matching infra-structures like AC/DC interconnections for C&T, collection and transmission, from the electrical generators to the mains. Business agreements on balancing are thus also needed to avoid physical “electricity storage”. Such agreements will be mutually beneficial when wind power grows in size and develops in stature. The interconnection’s point-of-connection and area-of-connection to the standard frequency AC power grid Fig. 4 right, is of main interest to sum up on infra-structures. The drive-trains and their connections of the wind turbine generator systems to the inter- connection are of main interest to sum up on intra-structures. There should not be a strict boundary for intra- & infra-structures associated to the two main sides: The Wind Side and the Utility Side of a wind farm. There should be a smooth transfer around interconnection’s point-of-connection to the large-scale power grid. Power electronics systems like an SVC will have dual purpose for a wind farm: Advantages for the turbines as well as advantages for the grid. Less mechanical stress in the drive-trains and less electrical stress in the electrical power systems. EPE 2003 - Toulouse ISBN : 90-75815-07-7 P.14PDF Image | Power Electronics and Wind Power
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