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Research on the Robustness of the Constant Speed Control of Hydraulic Energy Storage Generation

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  • Zengguang Liu

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China
    Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou 730050, China)

  • Guolai Yang

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China
    Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou 730050, China)

  • Liejiang Wei

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China
    Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou 730050, China)

  • Daling Yue

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China
    Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou 730050, China)

  • Yanhua Tao

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract

Energy storage plays a major role in solving the fluctuation and intermittence problem of wind and the effective use of wind power. The application of the hydraulic accumulator is the most efficient and convenient way to store wind energy in hydraulic wind turbines. A hydraulic energy storage generation system (HESGS) can transform hydraulic energy stored in the hydraulic accumulator into stable and constant electrical energy by controlling the variable motor, regardless of wind changes. The aim of the present study is to design a constant speed control method for the variable motor in the HESGS and investigate the influence of the controller’s main parameters on the resistance of the HESGS to external load power disturbances. Mathematical equations of all components in this system are introduced and an entire system simulation model is built. A double closed-loop control method of the variable motor is presented within this paper, which keeps the motor speed constant for the fixed frequency of electrical power generated by the HESGS. Ultimately, a series of simulations with different proportional gains and integral gains under the environment of changeless load power step are conducted. At the same time, comparison analyses of the experiment and simulation under variable load power step are performed. The results verify the correctness and the usability of the simulation model, and also indicate that the proposed control method is robust to the disturbances of changing load power.

Suggested Citation

  • Zengguang Liu & Guolai Yang & Liejiang Wei & Daling Yue & Yanhua Tao, 2018. "Research on the Robustness of the Constant Speed Control of Hydraulic Energy Storage Generation," Energies, MDPI, vol. 11(5), pages 1-14, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1310-:d:148185
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    References listed on IDEAS

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    Cited by:

    1. Donglai Zhao & Wenjie Ge & Xiaojuan Mo & Bo Liu & Dianbiao Dong, 2019. "Design of A New Hydraulic Accumulator for Transient Large Flow Compensation," Energies, MDPI, vol. 12(16), pages 1-17, August.
    2. Wenbin Su & Hongbo Wei & Penghua Guo & Ruizhe Guo, 2021. "Remote Monitoring and Fault Diagnosis of Ocean Current Energy Hydraulic Transmission and Control Power Generation System," Energies, MDPI, vol. 14(13), pages 1-18, July.

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