Parametric uncertainty in affecting transient characteristics of multi-parallel hydropower systems in the successive load rejection

Xu, Beibei; Chen, Diyi; Zhang, Xuelan; Riasi, Alireza

doi:10.1016/j.ijepes.2018.10.029

Cited by 20 publications

(11 citation statements)

References 28 publications

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“…Components of the HTGS exhibit strong nonlinearity, such as the hydro-turbine and governor [108,109], and many uncertain factors exist in structural parameters because of equipment aging and unit vibrations [33]. Modeling HTGS is, therefore, an important and difficult task.…”

Section: Htgs Modelsmentioning

confidence: 99%

A review of dynamic models and stability analysis for a hydro-turbine governing system

Zhang

Egusquiza

et al. 2021

Renewable and Sustainable Energy Reviews

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Section: Htgs Modelsmentioning

confidence: 99%

A review of dynamic models and stability analysis for a hydro-turbine governing system

Zhang

Egusquiza

et al. 2021

Renewable and Sustainable Energy Reviews

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“…To overcome the limitations of local methods (linearity and local variations), global sensitivity analysis considering the whole variation range of the inputs was developed in the late 1980s [35]. The extended Fourier amplitude sensitivity test (EFAST) is one of the most commonly used global sensitivity analysis methods, since it studies the influence of each parameter and the interaction of parameters on system output when multiple parameters change simultaneously [39]. Please see Xu et al, for detailed information about EFAST [40].…”

Section: Sensitivity Analysismentioning

confidence: 99%

Exploring the Regulation Reliability of a Pumped Storage Power Plant in a Wind–Solar Hybrid Power Generation System

Zhang

Egusquiza

et al. 2021

Water

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In the coming decades, the proportion of wind–solar energy in power system significantly increases, resulting to uncertainties of power fluctuation in abundant wind–solar energy regions. The flexibility operation of Pumped Storage Power Plants (PSPPs) has already been widely recognized to regulate wind–solar power fluctuations; however, less is known about the regulation reliability of the PSPP affected by them. It is a challenge, since various uncertainties exist during this regulation process. Here, a mathematical model with a solar–wind–hydro hybrid power generation system is adopted to investigate the regulation reliability of PSPP. The uncertainties and limitations of model parameters are considered during this process. Five regulation indexes, i.e., rise time, settling time, peak value, peak time and overshoot of the reactive power generator terminal voltage, guide vane opening and angular velocity, are extracted to evaluate the PSSP’s regulation quality. Finally, the PSPP reliability probability affected by parametric uncertainties is presented. The obtained results show that the inertia coefficient is the most sensitivity parameters for the settling time, peak value and peak time with sensitivity index 33.7%, 72.55% and 71.59%, respectively. The corresponding total contribution rate of the top 10 sensitive parameters are 74.45%, 93.45% and 87.15%, respectively. Despite some types of uncertainties not being considered, the results of this research are important for the regulation reliability evaluation of PSPPs in suppressing power fluctuations of wind and solar generation.

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“…The conventional FSPSP utilises synchronous generator. The adjustment of mechanical power is realised by guide vane opening while reactive power is regulated by field current [12, 15, 21]. Lagging and leading phase operation are two normal operating modes under high and low field currents [31, 32].…”

Section: Theory and Properties Of Leading Phase Operation Of Fspsp mentioning

confidence: 99%

“…The number of theoretical and experimental researches have been conducted to analyse operational performances and power/frequency regulation ability of PSP. Xu et al [15] built a model of multi‐parallel hydropower system and utilised global sensitivity analysis to assess the contributions of different parameters during the process of successive load rejection. Li et al [13] built an integrated hydraulic‐mechanical‐electrical model of PSP and analysed the dynamic characteristics of a PSP in pumping phase modulation.…”

Section: Introductionmentioning

confidence: 99%

Advantages of variable‐speed pumped storage plants in generating phase‐modulation mode: rapidity and stability

Hu¹,

Deng²,

Chen³

2020

IET Renewable Power Generation

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The increase of renewable energy generation penetration rate exerts a passive impact on the power system. A pumped‐storage plant (PSP) is a proper technology to depress power fluctuation and regulate the frequency of the power system. Variable‐speed PSP (VSPSP) is a relatively novel technology and has unique advantages when participating in power and frequency regulation. This study focuses on the generating phase modulation of VSPSP and fixed‐speed PSP (FSPSP). The integrated hydraulic‐mechanical‐electrical models of FSPSP and VSPSP are built and vector control theory is introduced in the model of VSPSP. Based on these two models, this study analyses operational performance and power response under generating phase‐modulation mode. The results reveal that the power regulation ability of VSPSP is more accurate and rapid. In addition, the operation of VSPSP is not restricted by a stability limit and the range of power regulation is expanded. Eventually, it could be observed that weak coupling between the mechanical and electrical system in VSPSP helps to increase efficiency and prolong life‐span of pumped‐turbine. The results and conclusions obtained from this study help to mitigate power fluctuation and improve strategies of power regulation of hybrid power systems with PSP.

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Parametric uncertainty in affecting transient characteristics of multi-parallel hydropower systems in the successive load rejection

Cited by 20 publications

References 28 publications

A review of dynamic models and stability analysis for a hydro-turbine governing system

A review of dynamic models and stability analysis for a hydro-turbine governing system

Exploring the Regulation Reliability of a Pumped Storage Power Plant in a Wind–Solar Hybrid Power Generation System

Advantages of variable‐speed pumped storage plants in generating phase‐modulation mode: rapidity and stability

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