Stability Region Exploring of Shunt Active Power Filters Based on Output Admittance Modeling

Lei, Jintao; Qin, Zian; Li, Wuhua; Bauer, Pavol; He, Xiangning

doi:10.1109/tie.2020.3044750

Cited by 27 publications

(11 citation statements)

References 38 publications

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“…In OWPPs, however, the passive filter can only be put in either the nacelle of the wind turbine or the offshore platform, both of which have a high cost per square meter. Further, [70] shows that the harmonic issues in the bandwidth of the converter controller are usually matters of impedance matching, while an active power filter (APF) does not necessarily achieve impedance matching. Alternatively, an active filter (also named virtual impedance), if tuned properly, can achieve impedance matching, and it also introduces flexibility, which means that the filter can still be tuned after deployment if the configuration of the OWPP changes and thereby the harmonic issue changes [71], [72].…”

Section: B Harmonic Mitigationmentioning

confidence: 99%

Grid Integration of Offshore Wind Power: Standards, Control, Power Quality and Transmission

Wu,

Seo,

et al. 2024

IEEE Open J. Power Electron.

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Offshore wind is expected to be a major player in the global efforts toward decarbonization, leading to exceptional changes in modern power systems. Understanding the impacts and capabilities of the relatively new and uniquely positioned assets in grids with high integration levels of inverter-based resources, however, is lacking, raising concerns about grid reliability, stability, power quality, and resilience, with the absence of updated grid codes to guide the massive deployment of offshore wind. To help fill the gap, this paper presents an overview of the state-of-the-art technologies of offshore wind power grid integration. First, the paper investigates the most current grid requirements for wind power plant integration, based on a harmonized European Network of Transmission System Operators (ENTSO-E) framework and notable international standards, and it illuminates future directions. The paper discusses the wind turbine and wind power plant control strategies, and new control approaches, such as grid-forming control, are presented in detail. The paper reviews recent research on the ancillary services that offshore wind power plants can potentially provide, which, when harmonized, will not only comply with regulations but also improve the value of the asset. The paper explores topics of wind power plant harmonics, reviewing the latest standards in detail and outlining mitigation methods. The paper also presents stability analysis methods for wind power plants, with discussions centered on validity and computational efficiency. Finally, the paper discusses wind power plant transmission solutions, with a focus on high-voltage direct-current topologies and controls.

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Section: B Harmonic Mitigationmentioning

confidence: 99%

Grid Integration of Offshore Wind Power: Standards, Control, Power Quality and Transmission

Wu,

Seo,

et al. 2024

IEEE Open J. Power Electron.

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“…Literatures [31][32][33][34][35][36] investigate the issue of harmonic oscillation in SAPF systems with selective harmonic current detection and points out the interaction between source impedance, SAPF, and non-linear loads. They uniformly concluded that the resonance peak of the source impedance located near the harmonic compensation frequency is the cause of harmonic oscillation.…”

Section: Introductionmentioning

confidence: 99%

Analysis and stabilization for full harmonic compensation oscillation in SAPF system with source current direct control

Xie,

Yi,

Zhuo

et al. 2023

IET Power Electronics

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Shunt active power filter (SAPF) has emerged as a promising solution for mitigating harmonic distortions. Due to the interaction between the current inner‐loop of SAPF, source impedance and non‐linear loads, harmonic oscillation issue arises and adversely affects the stability of the system, thus in turn exacerbating the harmonic distortion. However, previous studies paid less attention to the value of phase adjustment in improving the dynamic behaviour of the loop and thus stabilizing harmonic oscillation. Taking the dynamic characteristics between source impedance and non‐linear load into consideration, this paper models and analyzes the SAPF system with source current direct control to reveal the law of full harmonic compensation oscillation. Based on the analysis, an enhanced phase adjustment strategy using load current feedforward is proposed and designed to stabilize harmonic oscillation, while maintaining a favourable trade‐off between stability and harmonic compensation performance. The small‐signal model validated for stability analysis and the effectiveness of proposed stabilization strategy are verified by simulation and experiment.

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“…By injecting a compensation current with an equal magnitude to the reference current but with the adverse phase, SAPF can ensure that the grid current has the unit power factor and no distortion [4]. Unlike the passive power filter (PPF), which is sensitive to component parameters and prone to resonate with other loads in the grid, the SAPF provides a flexible and effective solution to common power quality issues, such as reactive power, harmonics, and imbalance [5,6].…”

Section: Introductionmentioning

confidence: 99%

Research on Oscillation Suppression Methods in Shunt Active Power Filter System

Hou

Wang

et al. 2022

Energies

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The shunt active power filter (SAPF) system oscillation is a massive threat to the security and stability of the power grid. This study classifies SAPF oscillation into two categories according to the difference in mechanisms. The SAPF oscillation in one category is caused by the resonant characteristics of a switching noise filter and is called external loop amplification. The SAPF oscillation in the other category is induced by the presence of a capacitor in the load current for SAPF and is called self-excited oscillation. Unlike previous studies, this study tried to reveal the internal relationship between the two kinds of SAPF oscillation, present a general shunt virtual-damping-based SAPF oscillation suppression strategy covering the previous resonant damping method, and provide the discrete domain stability criterion of the control system. The sampling frequency was at least six times the resonant frequency. The stability region was enlarged with an increase in the sampling frequency and narrowed with a rise in the resonant frequency. As to the harmful self-excited oscillation problem, this study proposes a composite control strategy combining selective harmonic compensation and grid-side current feedback. Moreover, this study considers the more general resistance–inductance–capacitance load situations and analyzes the stability of the SAPF–Thyristor Switched Capacitor (TSC) hybrid compensation system. Simulations and experiments demonstrated that the proposed compound control method can reduce the primary harmonics of the system by more than 90% and has a better oscillation suppression performance than previous suppression methods. In particular, if we selected the TSC series reactance rate following more than 6%, self-excited oscillation could usually be avoided.

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Stability Region Exploring of Shunt Active Power Filters Based on Output Admittance Modeling

Cited by 27 publications

References 38 publications

Grid Integration of Offshore Wind Power: Standards, Control, Power Quality and Transmission

Grid Integration of Offshore Wind Power: Standards, Control, Power Quality and Transmission

Analysis and stabilization for full harmonic compensation oscillation in SAPF system with source current direct control

Research on Oscillation Suppression Methods in Shunt Active Power Filter System

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