Impedance modeling of wind turbine-variable speed pumped storage combined operation system

Wang, Fangzhou; Zhu, Shunying; Liu, Kaipei; Chen, Man; Du, Yixing

doi:10.1016/j.egyr.2021.08.017

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…Because of high efficiency and optimized power production in the grid at different wind speeds, the variable-speed WTS has better than fixed-speed WTS. As a result, variablespeed WTS have been used more effectively in recent years [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Dissipative-based sampled-data control for T-S fuzzy wind turbine system via fragmented-delayed state looped functional approach

Anbalagan

Joo

2022

Nonlinear Dyn

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This study analyzes the problem of dissipativebased fuzzy sampled-data control mechanism for variablespeed wind turbine system (WTS) by fragmented-delayed state looped functional (FDSLF) framework. First, the proposed nonlinear variable-speed WTS is transformed into linear subsystems based on the Takagi-Sugeno (T-S) fuzzy approach. Then, the concept of coupling leakage time-varying delay is proposed to construct a more generalized T-S fuzzy model. After that, two novel integral inequalities are introduced to tackle the derivative of the time-dependent looped Lyapunov-Krasovskii functional (LKF). Besides, an improved FDSLF approach is presented such that the considered LKF can contain more information on fragmented-delayed states and sampling intervals from t k to t k+1 . Based on this FDSLF approach, some sufficient conditions are derived to ensure the addressed system is asymptotically stable under an optimizing performance index. And then, the desirable control gains are obtained by solving the linear matrix inequalities (LMIs) with bounds of sampling intervals. Finally, the derived conditions are validated with the considered model and verify the effectiveness of the proposed control scheme. Furthermore, a comparison result is also performed to show the less conservative nature of the derived conditions. Keywords T-S fuzzy systems • Dissipativity-based sampled-data control mechanism • Fragmented-delayed state • Two-sided looped functional • Variable-speed wind turbine system Pratap Anbalagan and Young Hoon Joo are with Research center for wind energy systems,

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Section: Introductionmentioning

confidence: 99%

Dissipative-based sampled-data control for T-S fuzzy wind turbine system via fragmented-delayed state looped functional approach

Anbalagan

Joo

2022

Nonlinear Dyn

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Transient Characteristics and Operation Regulation of Grid‐Connected Variable Speed Pumped Storage‐Wind‐Solar Hybrid Power System

Li,

Song,

Guo

2024

Energy Science & Engineering

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This article investigates the transient characteristics and operation regulation of grid‐connected variable speed pumped storage (VSPS)‐wind‐solar hybrid power system (HPS). Firstly, the model of grid‐connected VSPS‐wind‐solar HPS is established. Secondly, based on a calculating example, the transient characteristics of grid‐connected VSPS‐wind‐solar HPS are analyzed by using numerical simulation. Then, the effects of grid parameters and capacity ratios on transient characteristics of the grid‐connected VSPS‐wind‐solar HPS are revealed. Finally, the regulation of governor and frequency converter for the grid‐connected VSPS‐wind‐solar HPS is illuminated. The results indicate that the influence of wind speed disturbance and light intensity disturbance on the whole grid‐connected VSPS‐wind‐solar HPS can be effectively reduced by using the pitch angle controller and VSPS unit, and the overshoot of power grid frequency does not exceed 0.1%, and the adjustment time does not exceed 4.36 s. Compared to the isolated VSPS power station, the regulation quality of the transient characteristics of grid‐connected VSPS power station is worse. The coupling effect between the wind power station and power grid is weak. The increase of the capacity ratios of VSPS power station and wind power station has both advantages and disadvantages for the transient process of rotational speed of pump‐turbine. The increase of the capacity ratio of solar power station is disadvantageous for the transient process of rotational speed of pump‐turbine. The regulation effect of the control link PI‐1 plays a dominant role in the frequency converter. The effect of the parameters for the control links of frequency converter on the regulation quality of grid‐connected VSPS‐wind‐solar HPS is weaker than that of governor.

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Power control of an autonomous wind energy conversion system based on a permanent magnet synchronous generator with integrated pumping storage

Merahi,

Mernache,

Aouzelag

et al. 2024

Sci Rep

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Wind energy plays a crucial role as a renewable source for electricity generation, especially in remote or isolated regions without access to the main power grid. The intermittent characteristics of wind energy make it essential to incorporate energy storage solutions to guarantee a consistent power supply. This study introduces the design, modeling, and control mechanisms of a self-sufficient wind energy conversion system (WECS) that utilizes a Permanent magnet synchronous generator (PMSG) in conjunction with a Water pumping storage station (WPS). The system employs Optimal torque control (OTC) to maximize power extraction from the wind turbine, achieving a peak power coefficient ( C p ) of 0.43. A vector control strategy is applied to the PMSG, maintaining the DC bus voltage at a regulated 465 V for stable system operation. The integrated WPS operates in both motor and generator modes, depending on the excess or shortfall of generated wind energy relative to load demand. In generator mode, the WPS supplements power when wind speeds are insufficient, while in motor mode, it stores excess energy by pumping water to an upper reservoir. Simulation results, conducted in MATLAB/Simulink, show that the system efficiently tracks maximum power points and regulates key parameters. For instance, the PMSG successfully maintains the reference quadrature current, achieving optimal torque and power output. The system’s response under varying wind speeds, with an average wind speed of 8 m/s, demonstrates that the generator speed closely follows turbine speed without a gearbox, leading to efficient power conversion. The results confirm the flexibility and robustness of the control strategies, ensuring continuous power delivery to the load. This makes the system a feasible solution for isolated, off-grid applications, contributing to advancements in renewable energy technologies and autonomous power generation systems.

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Impedance modeling of wind turbine-variable speed pumped storage combined operation system

Cited by 4 publications

References 5 publications

Dissipative-based sampled-data control for T-S fuzzy wind turbine system via fragmented-delayed state looped functional approach

Dissipative-based sampled-data control for T-S fuzzy wind turbine system via fragmented-delayed state looped functional approach

Transient Characteristics and Operation Regulation of Grid‐Connected Variable Speed Pumped Storage‐Wind‐Solar Hybrid Power System

Power control of an autonomous wind energy conversion system based on a permanent magnet synchronous generator with integrated pumping storage

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