Research on reducing flow shock of the digital hydraulic wind turbine

IF 0.8 4区工程技术 Q4 ENGINEERING, MECHANICAL Transactions of The Canadian Society for Mechanical Engineering Pub Date : 2023-07-27 DOI:10.1139/tcsme-2022-0167

Zengguang Liu, Benguo Zhang, Liejiang Wei, Daling Yue, Lu Ren, Liqiang Su, Yuyang Zhao

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Abstract

The wind turbine with digital hydraulic transmission can make the corresponding hydraulic pump work according to the wind speed, so that the hydraulic wind turbine can maintain high efficiency in the whole working wind speed. However, the switching of different displacement hydraulic pumps will cause a large flow impact on the hydraulic system of the wind turbine, affecting the working characteristics of the wind turbine and the absorption of wind energy. Based on the analysis of the working principle of the digital hydraulic wind turbine, the scheme of 5MW wind turbine is designed and the AMESim modele is established. The dynamic characteristics of the digital hydraulic wind turbine under two switching modes are compared. An advance valve closing control strategy is proposed to reduce the instantaneous flow impact. Simulation results show that the control strategy diminished the system flow shock by about 50% when switching the hydraulic pump. Finally, a hardware-in-loop system of 5.5kW digital hydraulic turbine is built to verify the effectiveness of the proposed control strategy. The research results provide a theoretical basis and technical reference for the efficient utilization of wind energy and stable operation of the digital hydraulic wind turbines.

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降低数字式液压风机流动冲击的研究

采用数字液压传动的风机可以使相应的液压泵根据风速工作，使液压风机在整个工作风速下保持高效率。然而，不同排量液压泵的切换会对风力涡轮机的液压系统造成较大的流量影响，影响风力涡轮机的工作特性和风能的吸收。在分析数字液压风机工作原理的基础上，设计了5MW风机的方案，建立了AMESim模型。比较了数字液压风机在两种切换模式下的动态特性。提出了一种提前关阀控制策略，以减少瞬时流量的影响。仿真结果表明，当切换液压泵时，该控制策略将系统的流动冲击降低了约50%。最后，建立了5.5kW数字式水轮机的半实物系统，验证了所提控制策略的有效性。研究成果为高效利用风能、实现数字化风机的稳定运行提供了理论依据和技术参考。

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来源期刊

Transactions of The Canadian Society for Mechanical Engineering 工程技术-工程：机械

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

5 months

期刊介绍： Published since 1972, Transactions of the Canadian Society for Mechanical Engineering is a quarterly journal that publishes comprehensive research articles and notes in the broad field of mechanical engineering. New advances in energy systems, biomechanics, engineering analysis and design, environmental engineering, materials technology, advanced manufacturing, mechatronics, MEMS, nanotechnology, thermo-fluids engineering, and transportation systems are featured.