Design optimization and site matching of direct-drive permanent magnet wind power generator systems

H. Li and Z. Chen

Renewable Energy, 2009, vol. 34, issue 4, 1175-1184

Abstract: This paper investigates the possible site matching of the direct-drive wind turbine concepts based on the electromagnetic design optimization of permanent magnet (PM) generator systems. Firstly, the analytical models of a three-phase radial-flux PM generator with a back-to-back power converter are presented. The optimum design models of direct-drive PM wind generation system are developed with an improved genetic algorithm, and a 500-kW direct-drive PM generator for the minimal generator active material cost is compared to demonstrate the effectiveness of the design optimization. Forty-five PM generator systems, the combinations of five rated rotor speeds in the range of 10–30rpm and nine power ratings from 100kW to 10MW, are optimally designed, respectively. The optimum results are compared graphically in terms of the generator design indexes. Next, according to the design principle of the maximum wind energy capture, the rotor diameter and the rated wind speed of a direct-drive wind turbine with the optimum PM generator are determined. The annual energy output (AEO) is also presented using the Weibull density function. Finally, the maximum AEO per cost (AEOPC) of the optimized wind generator systems is evaluated at eight potential sites with annual mean wind speeds in the range of 3–10m/s, respectively. These results have shown the suitable designs for the optimum site matching of the investigated PM generator systems.

Keywords: Wind turbines; Direct-drive; Permanent magnet generator; Design optimization; Site matching (search for similar items in EconPapers)
Date: 2009
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (16)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:34:y:2009:i:4:p:1175-1184

DOI: 10.1016/j.renene.2008.04.041

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