Reduced-Scale Models of Variable Speed Hydro-Electric Plants for Power Hardware-in-the-Loop Real-Time Simulations

Guo, Baoling; Mohamed, Amgad; Bacha, Seddik; Alamir, Mazen; Boudinet, Cédric; Pouget, Julien

doi:10.3390/en13215764

Cited by 9 publications

(9 citation statements)

References 38 publications

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“…Experiments are conducted in a real-time hybrid PHIL test benchmark, as schematically illustrated in Fig. 20, which consists of the three-phase grid-connected converter, the disturbed grid emulator [35], and the dSPACE hardware (DS1005) [36]. The three-phase GcC is a back-to-back Pulse Width Modulation (PWM) voltage source converter.…”

Section: Experimental Tests and Resultsmentioning

confidence: 99%

“…The three-phase GcC is a back-to-back Pulse Width Modulation (PWM) voltage source converter. The control signal is converted to the PWM command for the converters in real time [36]. The disturbed grid is emulated by the RT-LAB real-time digital simulator [8].…”

Section: Experimental Tests and Resultsmentioning

confidence: 99%

“…The implemented control algorithms are encoded in the dSPACE modular of DS2005 board under the Matlab/ Simulink environment [36]. The control structure of gridconnected converter is illustrated in Fig.…”

Section: Experimental Tests and Resultsmentioning

confidence: 99%

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A phase-locked loop using ESO-based loop filter for grid-connected converter: performance analysis

Guo

Bacha

Alamir

et al. 2021

Control Theory Technol.

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An extended state observer (ESO)-based loop filter is designed for the phase-locked loop (PLL) involved in a disturbed grid-connected converter (GcC). This ESO-based design enhances the performances and robustness of the PLL, and, therefore, improves control performances of the disturbed GcCs. Besides, the ESO-based LF can be applied to PLLs with extra filters for abnormal grid conditions. The unbalanced grid is particularly taken into account for the performance analysis. A tuning approach based on the well-designed PI controller is discussed, which results in a fair comparison with conventional PI-type PLLs. The frequency domain properties are quantitatively analysed with respect to the control stability and the noises rejection. The frequency domain analysis and simulation results suggest that the performances of the generated ESO-based controllers are comparable to those of the PI control at low frequency, while have better ability to attenuate high-frequency measurement noises. The phase margin decreases slightly, but remains acceptable. Finally, experimental tests are conducted with a hybrid power hardware-in-the-loop benchmark, in which balanced/unbalanced cases are both explored. The obtained results prove the effectiveness of ESO-based PLLs when applied to the disturbed GcC.

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Section: Experimental Tests and Resultsmentioning

confidence: 99%

Section: Experimental Tests and Resultsmentioning

confidence: 99%

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A phase-locked loop using ESO-based loop filter for grid-connected converter: performance analysis

Guo

Bacha

Alamir

et al. 2021

Control Theory Technol.

Self Cite

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“…The most common structure of a PEC is a back-to-back (AC/DC/AC) voltage source converter with a DC link circuit [19][20][21][22]31]. The machine-side converter is usually a forcecommutated rectifier [15].…”

Section: Power Electronic Converter In the Shp Control Systemmentioning

confidence: 99%

“…The proposed unification and development of type-series for hydraulic turbines will allow for multiple installations of the same modules and hydro sets in one facility. The decision to use a variable rotational speed for turbines and a permanent magnet-excited generator results from the need to simplify the turbine design and eliminate mechanical transmission [14][15][16][17][18][19][20][21][22]. Solutions for electric power-generation systems with variable rotational speeds are commonly used in producing wind energy, mainly with higher powers above 1 MW.…”

Section: Introductionmentioning

confidence: 99%

Alternative Solutions for Small Hydropower Plants

et al. 2022

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Obtaining energy from renewable resources is a worldwide trend in the age of increasing energy demand. Hydropower has some potential in this field, especially for low-power locations. However, construction of such facilities requires high expenses, which is why some attempts at lowering the costs have been made, i.e., by proposing alternative solutions to the classic ones. This paper proposes a selection of options for small hydropower plants (SHP) that lower the investment costs while keeping up profitable operations. The proposed solutions concern simplifying the turbine’s and generator’s integration by installing them in dedicated prefabricated concrete modules. A rare but simple and cheap semi-Kaplan type of turbine with a non-classical spiral inflow is proposed. The turbine operates a permanent magnet (PM)-excited generator, converting the energy at a variable rotational speed. Thanks to this approach, it is possible to simplify the regulation system and eliminate expensive mechanical transmission. However, on the power grid side, a power electronic converter (PEC) must be coupled with the generator. The advantage of this solution compared to the classical ones is that the reliability of power electronics is much higher than that of mechanical systems. This paper presents modeling research on semi-Kaplan turbines’ series development, and a dedicated PM generator is presented as an example of a complete hydro unit with 50 kW power.

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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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Reduced-Scale Models of Variable Speed Hydro-Electric Plants for Power Hardware-in-the-Loop Real-Time Simulations

Cited by 9 publications

References 38 publications

A phase-locked loop using ESO-based loop filter for grid-connected converter: performance analysis

A phase-locked loop using ESO-based loop filter for grid-connected converter: performance analysis

Alternative Solutions for Small Hydropower Plants

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

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