Power Quality in Renewable Energy Systems - Challenges and Opportunities

Sun, Jian

doi:10.24084/repqj10.002

Cited by 6 publications

(2 citation statements)

References 14 publications

(17 reference statements)

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“…With the increasing integration of renewable energy sources such as solar and wind into the power system, the switching frequencies of photovoltaic and wind turbines may reach several thousand Hz [6]. The bandwidth of the control function is higher than the fundamental frequency of the power system, such as VSC‐HVDV and MMC‐ HVDC inverters.…”

Section: Principle Of Oscillationmentioning

confidence: 99%

Power system wideband oscillation estimation, localization, and mitigation

Qiu

et al. 2023

IET Generation Trans & Dist

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With the development of the energy structure of the power system, the characterization of the observed oscillation in the power system has steadily evolved. With the increasingly high penetration of distributed energy sources and power electronic devices, such as the photovoltaic, wind power and charging pile, the basic mechanism, frequency ranges and propagation of oscillation would become more dynamic and complex. Therefore, the traditional parameter estimation, as well as the suppression methods would also suffer from dynamic oscillations. To this end, this paper first investigates the oscillation propagation and typical events caused by the oscillations. Next, the oscillation model estimation method including the model-based and data-driven based methods is discussed. The benefits and difficulties of various parameter estimate techniques are highlighted. Under this context, the validity and limitations of the current power system stability are summarized. Furthermore, the different oscillation damping and mitigation measures are compared, and the major adaptability and limitations are listed for the specific application scenarios. Conclusions are drawn, and the wideband oscillation becomes the future research objective where the future work is presented at the end of the paper.

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Section: Principle Of Oscillationmentioning

confidence: 99%

Power system wideband oscillation estimation, localization, and mitigation

Qiu

et al. 2023

IET Generation Trans & Dist

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“…These solutions have focused on the steady-state harmonic interactions. However, wide-bandwidth controls may cause system instability or oscillations owing to the lack of stability margins at frequencies ranging from a few hundred hertz to several kilohertz [8]. The dynamics of CIGs and control interactions among grid components should be properly incorporated and, thus, harmonics and stability issues are addressed in the grid interconnection process.…”

Section: Introductionmentioning

confidence: 99%

Impedance-Based Stability Analysis in Grid Interconnection Impact Study Owing to the Increased Adoption of Converter-Interfaced Generators

et al. 2017

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This study investigates the emerging harmonic stability concerns to be addressed by grid planners in generation interconnection studies, owing to the increased adoption of renewable energy resources connected to the grid via power electronic converters. The wideband and high-frequency electromagnetic transient (EMT) characteristics of these converter-interfaced generators (CIGs) and their interaction with the grid impedance are not accurately captured in the typical dynamic studies conducted by grid planners. This paper thus identifies the desired components to be studied and subsequently develops a practical process for integrating a new CIG into a grid with the existing CIGs. The steps of this process are as follows: the impedance equation of a CIG using its control dynamics and an interface filter to the grid, for example, an LCL filter (inductor-capacitor-inductor type), is developed; an equivalent impedance model including the existing CIGs nearby and the grid observed from the point of common coupling are derived; the system stability for credible operating scenarios is assessed. Detailed EMT simulations validate the accuracy of the impedance models and stability assessment for various connection scenarios. By complementing the conventional EMT simulation studies, the proposed analytical approach enables grid planners to identify critical design parameters for seamlessly integrating a new CIG and ensuring the reliability of the grid.

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