风力机按最大功率点跟踪方式运行，在考虑发电机损耗和变频器容量的前提下，通过最优化电流矢量控制获得最大输出功率。

The maximum available power is obtained by the optimum current vector control considering the converter capacity and the losses of generator.

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针对大容量风电机组的中压变换问题，本文研究一种基于多绕组发电机的模块化级联型变换器，通过模块单元级联实现中压输出，从而省去升压变压器。

This paper has presented a module-cascaded system for multi-coil direct-drive permanent magnet wind generator system with high voltage output, eliminating the grid-side step-up transformer.

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