Abstract
The demerits of traditional wind power generation system-equipped gearbox transmission and direct-drive transmission are becoming more and more obvious; a new hydraulic-type wind power generation system has aroused the attention of both theoretical and industrial circles. In order to accurately reveal the general characteristics and efficiency of the new system, we built an 8-kW hydraulic wind power generation system, mainly to investigate the generating efficiency of the hydraulic motor in varied frequencies under different input pressures and flow conditions. The results show that under a low-frequency (10 Hz) condition, the generator has a low efficiency, near 0.2, while under a high-frequency (50 Hz) condition, the efficiency dramatically increases to 0.73. Meanwhile, with the increase of the frequency, both the output power and total efficiency of the system rise obviously. The total efficiency can reach up to 0.51 at a high frequency of 50 Hz, which is quite desirable. We find that the accomplishments of this study would provide a theoretical basis for the application and promotion of the hydraulic-type wind power generation system and offer a valuable research method on current energy, wave energy, and other new energy resources.
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