Abstract：Direct drive motor systems for offshore wind turbines will improve reliability and reduce maintenance costs. This paper describes a real-time status evaluation model for offshore direct-drive wind turbines. This model integrates the correlation coefficient method, deterioration analyses and fuzzy synthetic evaluation. The correlation coefficient method determines the weights of various indexes. The deterioration analysis normalizes the indicator parameters. The bottom-up, step-by-step, multi-level fuzzy synthetic evaluation method assesses the status of each subsystem of the offshore direct-drive wind turbine. An analysis of online inspection data for a direct-drive wind turbine shows that the model results are consistent with real operational data. This model is helpful for managing routine operations and maintenance for offshore direct-drive wind turbines to improve the operational efficiency of offshore wind farms.
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HUANG Biqing, HE Yan, WANG Tingyan. Fuzzy synthetic evaluation of the operational status of offshore direct-drive wind turbines. Journal of Tsinghua University(Science and Technology), 2015, 55(5): 543-549.
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2015, Vol. 55 
