Design and Implementation of a Digital Power Converter for Wind Generator

Zong-Han Liou and Chih-Chiang Hua


wind generator, bi-directional DC/DC converter, maximum power point tracking, single-ended primary inductance converter


This paper presents the design and implementation of the power converters for wind generator (WG). The proposed system consists of a permanent magnet synchronous generator, a dc/dc single-ended primary inductance converter (SEPIC), a bi-directional dc/dc converter and a full-bridge inverter. In the proposed system, a SEPIC converter is designed to make the wind power generator produce the maximum power output. By using perturbation and observation (P&Q) method, the duty ratio of the power converter is adjusted. The dc bus can be compensated fast by the bi-directional converter connected with lead-acid batteries. Then, a 110V/60Hz/250W ac output of the full-bridge inverter is achieved. A digital signal processor (TMS320LF2407A) is used to realize the system controller. Finally, a 250W wind energy conversion system is built and experimental results are provided to verify the theoretical analysis and feasibility of a wind power generator system.

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