Modified VOC Using Three Symmetrical Components for Grid-Supporting Operation During Unbalanced Grid Voltages and Grid-Forming Operation in Hybrid Single-Phase/Three-Phase Microgrid

Ghosh, Ritwik; Tummuru, Narsa Reddy; Rajpurohit, Bharat Singh

doi:10.1109/tie.2022.3225839

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…The majority of research on islanded microgrids focuses on correction for voltage imbalance, power management for various DGs and forms of energy storage, and parallel-inverter power sharing and circulation limitation [2]. In order to achieve effective functioning of the entire electric power system, distributed generation and the growing penetration of renewable energy sources are characteristics of the continuing transition in the electric power system [3]. Multiple elements have been created to address voltage imbalance compensation and improve the quality of the voltage waveform [4].…”

Section: Introductionmentioning

confidence: 99%

Distributed voltage unbalance mitigation in islanded microgrid using moth flame optimization and firebug swarm optimization

Gandikoti,

Jha,

Jha

et al. 2024

IJPEDS

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In recent trends, hybrid renewable energy sources (HRES) provide a better solution to meet energy demand, maximizing the productivity of electricity network. Due to the above-mentioned features, several researchers have given more attention to PV-wind-based HRES systems. A stable energy supply must be added, including batteries, diesel generator (DG), to meet demand in the event of a grid failure. To meet the voltage unbalance in islanded mode, the sizes of DG have need to be selected sensibly and HRES requires additional energy storage. To examine the voltage unbalance problems of an islanded microgrid, a hybrid optimization approach known as moth flame optimization (MFO) and firebug swarm optimization (FSO) is introduced. Due to various loads, harmonic distortion causes the voltage to unbalance, which can result in voltage collapse. To deliver a quick response in an island mode, a comprehensive algorithm called MFO-FSO control is proposed. MATLAB software is used to validate the results which demonstrate that the proposed MFO-FSO outperforms the conventional decoupling double synchronous reference frame (DDSRF) methods by reducing total harmonic distortion (THD) up to 1.21% and voltage unbalance factor (VUF) up to 1.427%.

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Section: Introductionmentioning

confidence: 99%

Distributed voltage unbalance mitigation in islanded microgrid using moth flame optimization and firebug swarm optimization

Gandikoti,

Jha,

Jha

et al. 2024

IJPEDS

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“…In this case too, the capability of supporting phase-by-phase power control, to provide, for example, unbalanced compensation, coupled with the grid-forming function is typically not achieved. In [18] and [19], the virtual-oscillator control technique is modified to enhance the operation in three-phase unbalanced grids. Operation with distinct power references for each phase has not been shown.…”

mentioning

confidence: 99%

An Unbalance and Power Controller Allowing Smooth Islanded Transitions in Three-Phase Microgrids

Lauri,

Caldognetto,

Biadene

et al. 2024

IEEE Trans. Ind. Electron.

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This article introduces a power controller for three-phase inverters in microgrids that can be used in three-phase three-wire and three-phase four-wire systems. The controller enables active and reactive power tracking and unbalanced current control during grid-tied operation, while also allowing seamless transitions into islanded operation. The proposal is motivated by the compelling need in forthcoming power-electronics-dominated grids to provide ancillary services for the main grid and to support grid-forming functionalities for the microgrid, especially in case of islanded operation. The control is developed on the symmetrical components framework. Power tracking is achieved by dedicated control loops that, exploiting P −f and Q−V droop laws applied on positive-sequence powers, accommodate output-power control during grid-tied operation as well as grid-forming capabilities during islanded operation. The controller also includes synchronous dq-frame control for negative-sequence current regulation for providing unbalanced current compensation. The proposed solution addresses the challenge of simultaneously providing concurrent grid-tied control features, such as output power tracking, during grid-tied operation as well as grid-forming capabilities during islanded operation. The related challenge stems from the intrinsically different control actions involved in the two modes of operation, namely, grid tied and islanded. The proposal is verified on an experimental setup composed of converters rated 3 kW.

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“…A system-level VOC control method was presented in [129]; termed sequence componentbased VOC (S-VOC), it introduced improved control to encompass synchronisation of all sequence voltage components. This enabled VOC to deal with unbalanced voltages, integrating both single-phase and three-phase inverters, while accurately sharing power in hybrid structures with linear and nonlinear loads.…”

mentioning

confidence: 99%

Grid-Forming Control: Advancements towards 100% Inverter-Based Grids—A Review

Ebinyu,

Abdel-Rahim,

Mansour

et al. 2023

Energies

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Changes are being implemented in the electrical power grid to accommodate the increased penetration of renewable energy sources interfaced with grid-connected inverters. The grid-forming (GFM) control paradigm of inverters in active power grids has emerged as a technique through which to tackle the effects of the diminishing dominance of synchronous generators (SGs) and is preferred to the grid-following (GFL) control for providing system control and stability in converter-dominated grids. Therefore, the development of the GFM control is important as the grid advances towards 100% inverter-based grids. In this paper, therefore, we aim to review the changing grid scenario; the behaviour of grid-connected inverter control paradigms and major GFM inverter controls, including their modifications to tackle low inertia, reduced power quality, fault-ride through capability, and reduced stability; and the state-of-the-art GFM models that are pushing the universality of GFM inverter control.

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Modified VOC Using Three Symmetrical Components for Grid-Supporting Operation During Unbalanced Grid Voltages and Grid-Forming Operation in Hybrid Single-Phase/Three-Phase Microgrid

Cited by 6 publications

References 29 publications

Distributed voltage unbalance mitigation in islanded microgrid using moth flame optimization and firebug swarm optimization

Distributed voltage unbalance mitigation in islanded microgrid using moth flame optimization and firebug swarm optimization

An Unbalance and Power Controller Allowing Smooth Islanded Transitions in Three-Phase Microgrids

Grid-Forming Control: Advancements towards 100% Inverter-Based Grids—A Review

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