Research on the robustness of the constant speed control of hydraulic energy storage generation

doi:10.3390/en11051310

	Research on the robustness of the constant speed control of hydraulic energy storage generation
	Liu, Zengguang 1,2; Yang, Guolai 1,2; Wei, Liejiang 1,2; Yue, Daling 1,2; Tao, Yanhua 1
刊名	Energies
	2018
卷号	11 期号:5
关键词	Energy storage Hydraulic accumulators Hydraulic motors Robust control Speed control Speed regulators Wind power Wind turbines Comparison analysis Constant speed control Double closed-loop control Electrical energy Energy storage systems Generation systems Hydraulic energy storage Mathematical equations
DOI	10.3390/en11051310
英文摘要	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. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.
WOS研究方向	Energy & Fuels
语种	英语
出版者	MDPI AG, Postfach, Basel, CH-4005, Switzerland
WOS记录号	WOS:000435610300288
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114224]
专题	能源与动力工程学院兰石研究院（新区研究院）
作者单位	1.Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Fluid Machinery and Systems, Gansu Province, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Liu, Zengguang,Yang, Guolai,Wei, Liejiang,et al. Research on the robustness of the constant speed control of hydraulic energy storage generation[J]. Energies,2018,11(5).
APA	Liu, Zengguang,Yang, Guolai,Wei, Liejiang,Yue, Daling,&Tao, Yanhua.(2018).Research on the robustness of the constant speed control of hydraulic energy storage generation.Energies,11(5).
MLA	Liu, Zengguang,et al."Research on the robustness of the constant speed control of hydraulic energy storage generation".Energies 11.5(2018).