SHI Qingyi, DENG Xiaogang, XIAO Xinyuan, HU Yushuang, WANG Rui. Study on Hydraulic Transmission of Offshore Low-speed Wind Energy Generator[J]. International Journal of Plant Engineering and Management, 2021, 26(1): 16-35

Study on Hydraulic Transmission of Offshore Low-speed Wind Energy Generator
SHI Qingyi, DENG Xiaogang, XIAO Xinyuan, HU Yushuang, WANG Rui
School of Mechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
For offshore hydraulic drive wind turbines, the problems of unsatisfactory speed control and low efficiency at low wind speeds are targeted. A low-speed high-torque radial piston pump is designed to replace the traditional fixed pump with a particular focus on its low-speed performance. The pump is characterized by small internal leakage at low wind speeds and high volumetric efficiency, which is beneficial to improve the power generation efficiency of the system. A new linear control method based on the PID algorithm and feedforward compensation was proposed to obtain the constant speed output control of variable motor at low wind speed. With the model for wind turbine and fixed pump-variable motor main drive system, the system was simulated and experimentally proved to verify the feasibility and anti-interference performance of the system control method at low wind speeds. A promising outcome was obtained on the response characteristics of system power and efficiency at low wind speeds. This can be a powerful technical support for the normal ustility of hydraulic drive wind turbines.
Key words:    wind power    low wind speed    hydraulic transmission    constant speed control    power generation efficiency   
Received: 2021-02-13     Revised:
DOI: 10.13434/j.cnki.1007-4546.2021.0102
Funds: This paper was supported by Chongqing Natural Science Foundation (cstc2019jcyj-msxm2000), Chongqing University of Science and Technology Graduate Science and Technology Innovation Project (JXXY201901)
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SHI Qingyi
DENG Xiaogang
XIAO Xinyuan
HU Yushuang

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