Control of transformerless T-type DVR using multiple delayed signal cancellation PLL under unbalanced and distorted grid condition

Rajkumar, K. C.; Parthiban, P.; Lokesh, Nalla

doi:10.1016/j.jestch.2021.01.013

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…To improve the estimate of the reference voltage for a transformerless T-type-converterbased DVR, Rajkumar et al [75] proposed multiple delayed signal cancellation (MDSC) phase-locked loops (MDSC PLLs) with shorter delay times and smaller memory requirements for the accurate estimation of the grid phase angle in order to improve DVR performance for various grid conditions, such as voltage sag/swell, unbalanced voltage sag/swell, harmonics and DC offset. SasiKiran and Manohar [77] introduced a DVR aimed at mitigating voltage swell challenges that uses an estimation method, for the symmetrical components of the supply voltages, based on an unscented Kalman filter (UKF), to assist the DVR control algorithm in generating reference signals for the voltage source converter (VSC) of the DVR, and this estimation method ensures that voltage swells are accurately and speedily discovered to remove them quickly, thereby protecting sensitive loads connected to distribution systems.…”

Section: Strategies For Dvr Controllersmentioning

confidence: 99%

Dynamic Voltage Restorer as a Solution to Voltage Problems in Power Systems: Focus on Sags, Swells and Steady Fluctuations

Mbuli

2023

Energies

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In this study, the author presents the results of a survey on the utilisation of a dynamic voltage restorer (DVR) in power systems to alleviate voltage problems that result in sags, swells and fluctuations in voltage outside the required steady limits. A methodology based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement is adopted for conducting and reporting on the review, while the Scopus database is used to locate the relevant publications. A total of 68 publications qualify for inclusion in the survey. A bibliometric analysis covering the number of publications per annum, the top 10 most-cited journals and the top 10 most-cited publications is performed. The information from the selected publications is extracted, summarised and categorised into network scenarios for the use of DVRs, topologies and optimisation of DVRs; strategies for DVR controllers; and platforms that evaluate the feasibility of DVR topologies and controllers. Moreover, research trends and gaps are evaluated. Finally, potential areas for future research are proposed. This study provides an overview of the research on the use of a DVR to resolve voltage problems and is a resource for researchers generally interested in distributed flexible AC transmission systems (DFACTSs) and particularly interested in DVRs.

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Section: Strategies For Dvr Controllersmentioning

confidence: 99%

Dynamic Voltage Restorer as a Solution to Voltage Problems in Power Systems: Focus on Sags, Swells and Steady Fluctuations

Mbuli

2023

Energies

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“…Due to inverter modulation, the output current may contain additional odd harmonics. This can result in high transient overcurrent at the PCC, which does harm to the operation of inductive loads such as radar (Rajkumar et al, 2021). The grid-forming (GFM) converter achieves presynchronization by power synchronization control method (Amin and Zhong, 2020; Ramezani et al, 2019), which does not depend on the phase information of main grid and can operate in the islanded mode and grid-connected mode.…”

Section: Introductionmentioning

confidence: 99%

Presynchronization control for ship microgrid of merchant marine inverters based on VSG algorithm with MFAC

Yao,

Pei,

Chi

et al. 2024

Transactions of the Institute of Measurement and Control

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The paper studies a presynchronization control of grid connection for large merchant marine microgrid inverters. We present a virtual synchronous generator (VSG) algorithm with model-free adaptive control (MFAC) to optimize the stable grid connection of ship microgrid and shore-to-ship power. To solve poor precision of presynchronization control under nonideal ship microgrid condition, an MFAC controller and its presynchronization method are developed for grid connection of ship-distributed generation inverters. The proposed presynchronization control method effectively avoids a high transient overcurrent and achieves a seamless grid connection to different types of shore power. The simulation results verify the effectiveness of the proposed control method.

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“…VOLUME 4, 2016 Therefore, this will reduce the dependence on fossil fuels and the global warming problems. Nevertheless, the transformerless topology has a serious problem, socalled the earth leakage current [3]. It is considered an unfavorable phenomenon as it reduces efficiency, pulls down safety, increases losses, and increases grid distortion.…”

Section: Introductionmentioning

confidence: 99%

From MPC-Based to End-to-End (E2E) Learning-Based Control Policy for Grid-Tied 3L-NPC Transformerless Inverter

et al. 2022

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Control of transformerless T-type DVR using multiple delayed signal cancellation PLL under unbalanced and distorted grid condition

Cited by 13 publications

References 20 publications

Dynamic Voltage Restorer as a Solution to Voltage Problems in Power Systems: Focus on Sags, Swells and Steady Fluctuations

Dynamic Voltage Restorer as a Solution to Voltage Problems in Power Systems: Focus on Sags, Swells and Steady Fluctuations

Presynchronization control for ship microgrid of merchant marine inverters based on VSG algorithm with MFAC

From MPC-Based to End-to-End (E2E) Learning-Based Control Policy for Grid-Tied 3L-NPC Transformerless Inverter

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