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Design of DC Architecture for Large-Scale Non-Grid-Connected Wind Power Generation System

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5 Author(s)
Jie Chen ; Coll. of Autom. Eng., Dept. of Electr. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing ; Xianjin Zhang ; Ran Chen ; Chunying Gong
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In this paper, a dc architecture for large-scale nongrid-connected wind power generation system (WPGS) is presented. Unlike the existed wind farms, the proposed structure has the merits of eliminated reactive power, low power loss, long transfer distance, and etc. With the purpose to overcome the effects of integrating large wind power plants into utility systems, a creative concept of direct integration of high energy consumption industry (HECI) with large scale WPGS where the fluctuant power or whole power is consumed by the HECI. A three-phase full-bridge high power step-up dc/dc converter is adopted to meet the implementation of the system. Compared to the traditional single-phase full-bridge dc/dc converter, the presented converter features strong power management ability, high efficiency and flexible transformer design. With proper control strategy, both of the voltage level before and after the dc transformer can be stabilized with a closed-loop converter located at the receiving-end of the transmission system. Finally, a 200 MW wind farm is simulated with the proposed dc architecture. The results verify the feasibility of the presented WPCS and system control method.

Published in:

Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific

Date of Conference:

27-31 March 2009

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