Nonlinear modeling and operation stability of variable speed pumped storage power station

Guo, Wencheng; Zhu, Daoyi

doi:10.1002/ese3.943

Cited by 19 publications

(3 citation statements)

References 24 publications

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“…Zhang et al 35 established a model of VSPSU with a surge tank and explored the effects of various factors on its stability and dynamic power response. Guo and Zhu 36 described variable‐speed PSP (VSPSP) as a fifth‐order nonlinear system and analyzed its operational stability through mathematical methods. Gao et al 37 explored the stability of a VSPSU with a governing system under the condition of small power disturbance.…”

Section: Introductionmentioning

confidence: 99%

Quantifying power regulation characteristics in pump mode of variable‐speed pumped storage unit with DFIM

Liu,

Yang,

Yang

et al. 2024

Energy Science & Engineering

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Pumped storage plants (PSPs) play an important role in renewable energy consumption in power systems. Variable‐speed technology is a new and critical direction for the development of PSPs. In pump mode, variable‐speed pumped storage units (VSPSUs) have wider power regulation ranges and more flexible power responses than fixed‐speed pumped storage units (FSPSUs); however, the corresponding quantification study of VSPSUs is rare. Therefore, this study aims to quantify the static and dynamic power regulation characteristics of VSPSU in pump mode. First, the modeling of the fast speed control strategy of VSPSU in pump mode is improved. Then, the power regulation range of the VSPSU is explored. The factors (i.e., power command, governor, and converter) affecting the power response rapidity are quantified through the engineering case of a variable‐speed PSP adopting the doubly fed induction machine. Accordingly, suggestions on the settings of the parameters are provided. Quantification results show that parameter tuning based on this study effectively solves the problem of low regulation rate caused by great power fluctuations under typical power regulation cases in pump mode. This VSPSU has the fastest regulation rate of 13.75%/s when adjusting 40% power. This study could provide technical support to the practical operation of VSPSU.

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Section: Introductionmentioning

confidence: 99%

Quantifying power regulation characteristics in pump mode of variable‐speed pumped storage unit with DFIM

Liu,

Yang,

Yang

et al. 2024

Energy Science & Engineering

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“…However, there has been relatively little work conducted on the stability of VSPSPS [14]. Guo et al [15] derived a nonlinear mathematical model of VSPSPS. The influence of factors on stability were studied.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Modeling and Stability of a Doubly-Fed Variable Speed Pumped Storage Power Station with Surge Tank Considering Nonlinear Pump Turbine Characteristics

Zhang,

Xue,

Sun

et al. 2022

Energies

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This paper investigates the nonlinear modeling and stability of a doubly-fed variable speed pumped storage power station (DFVSPSPS). Firstly, the mathematical model of DFVSPSPS with surge tank considering nonlinear pump turbine characteristics was derived and established. Then, Hopf bifurcation analysis of DFVSPSPS was performed. The stable region was identified and verified by example analysis. Moreover, the effect mechanism of nonlinear pump turbine characteristics on the stability of DFVSPSPS was explored. Finally, the influence of factors on the stability and dynamic response of DFVSPSPS was studied. The results indicate that the emerged Hopf bifurcation of DFVSPSPS is supercritical and the region on the low side of the bifurcation line is the stable region. Nonlinear head characteristics have a significant influence on the stability and dynamic response of DFVSPSPS. Nonlinear speed characteristics have an obvious effect on the stability and dynamic response of DFVSPSPS only under positive load disturbance and unstable surge tank. Nonlinear head characteristics are unfavorable for the stability of DFVSPSPS under positive load disturbance and favorable under negative load disturbance. A smaller flow inertia of penstock, a smaller head loss of penstock and a greater unit inertia time constant are favorable for the stability of DFVSPSPS. The stable region under the positive disturbance of active power is larger than that under the negative disturbance of active power. The time constant of the surge tank presents a saturation characteristic on the stability of DFVSPSPS.

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“…Furthermore, in [8], a model of variable speed doubly-fed induction-generator pumped storage power is presented, which is described as a nonlinear eighth-order state equation with eight state variables. Moreover, a five-order nonlinear dynamic system of the variable-speed pumped storage power station was developed in [9], while in [10], a variable-speed pumped storage model is shown via algebraic differential equations. In addition to the above mentioned examples, a nonlinear model of a water distribution network based on a port-Hamiltonian description is presented in [11].…”

Section: Introductionmentioning

confidence: 99%

A Reversible Hydropump–Turbine System

et al. 2022

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Water-pumped storage systems have become an ideal alternative to regulate the intermittent power delivered by renewable energy sources. For small-scale operations, a type of centrifugal pump coupled to asynchronous machines represents an adequate solution due to their techno-economic feasibility in addition to their ability to operate as reversible systems. This work provides a novel port-Hamiltonian modelling approach to an integrated reversible hydropump–turbine system, that can be switched from motor pump to turbine-generator by employing a conventional hydraulic switch. Our modelling strategy provides a clear physical interpretation of the energy flow from the mechanical to electrical domains. Then, the model was built with multi-domain storing and dissipating elements and the interconnection of well-defined input–output port pairs. The system’s internal energy, i.e., Hamiltonian function, can be exploited for energy-shaping control strategies. The performance of our modelling approach is validated via numerical simulations.

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Nonlinear modeling and operation stability of variable speed pumped storage power station

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 19 publications

References 24 publications

Quantifying power regulation characteristics in pump mode of variable‐speed pumped storage unit with DFIM

Quantifying power regulation characteristics in pump mode of variable‐speed pumped storage unit with DFIM

Nonlinear Modeling and Stability of a Doubly-Fed Variable Speed Pumped Storage Power Station with Surge Tank Considering Nonlinear Pump Turbine Characteristics

A Reversible Hydropump–Turbine System

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