Blar i NTNU Open på forfatter "Amin, Mohammad"
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Impedance Modeling and Stability Analysis of Grid-tied Universal Droop Control Inverter
Amin, Mohammad; Zhong, Qing-Chang (Chapter; Peer reviewed, 2019)This paper presents an impedance modeling and small-signal stability analysis of the grid-tied Universal Droop Control (UDC) inverter. The -impedance model of the UDC inverter is derived analytically and, which is verified ... -
Impedance Modelling and Stability Analysis of Virtual Synchronous Machine-based Wind Energy Conversion System
Widjaja, Claysius Dewanata (Master thesis, 2022)Ettersom antallet kraftelektronikkomformere øker på grunn av økningen i variabel fornybar energi, har det en betydelig innvirkning på dynamikken og stabiliteten til kraftsystemer. Siden kraftsystemer tradisjonelt domineres ... -
Impedance-Based Stability Evaluation of Virtual Synchronous Machine Implementations in Converter Controllers
Unamuno, Eneko; Rygg, Atle; Amin, Mohammad; Molinas Cabrera, Maria Marta; Barrena, Jon Andoni (Chapter, 2018)This paper presents a stability evaluation of two Virtual Synchronous Machine (VSM) implementations in the control of Voltage Source Converters (VSCs): a current-controlled (CCVSM) and a voltage-controlled (VCVSM) version ... -
Instantaneous frequency tracking of harmonic distortions for grid impedance identification based on Kalman filtering
Broen, Anders Kjeka; Amin, Mohammad; Skjong, Espen; Molinas Cabrera, Maria Marta (Chapter, 2016)This paper presents a non-invasive approach for real-time grid impedance identification based on the principle of instantaneous frequency tracking of voltage and current harmonics already present in the system, by the use ... -
Limitations in Impedance Reshaping of Grid Forming Converters for Instability Prevention
Shah, Chirag Ramgopal; Molinas, Marta; Nilsen, Roy; Amin, Mohammad (Chapter, 2023)Under a weak grid scenario, Grid Forming (GFM) converters have superior impedance-based small-signal stability compared to Grid Following (GFL) converters. The underlying assumption in defining a weak grid has traditionally ... -
Methods for Identification of Instantaneous Frequencies for Application in Isolated Microgrid
Jondal Helle, Haakon (Master thesis, 2017)THE introduction of new methods for production and distribution of electrical energy has increased the attention related to problems with power quality and the presence of time-varying frequencies. It has been reported ... -
Optimal power flow based coordinated reactive and active power control to mitigate voltage violations in smart inverter enriched distribution network
Wagle, Raju; Sharma, Pawan; Charu, Sharma; Amin, Mohammad (Journal article; Peer reviewed, 2023) -
Optimal power flow-based reactive power control in smart distribution network using real-time cyber-physical co-simulation framework
Wagle, Raju; Sharma, Pawan; Charu, Sharma; Amin, Mohammad; Rueda, Jose Luis; Gonzalez-Longatt, Francisco (Peer reviewed; Journal article, 2023)Future distribution networks (DN) are subject to rapid load changes and high penetration of variable distributed energy resources (DER). Due to this, the DN operators face several operational challenges, especially voltage ... -
Parallel Operation of Synchronous Generators in a DC Grid
Vadset, Tomas Skaar (Master thesis, 2021)I denne masteroppgaven, blir en modell for to synkrongeneratorer i et DC nett utviklet. Modellen er hovedsakelig utviklet i Simulink og består av to generatorer med en governor og excitation system hver. Hver generator ... -
Phase-Tracking Robust-Synchronization-Loop for Grid-Connected Converters
Amin, Mohammad (Peer reviewed; Journal article, 2021)This paper presents a novel phase-tracking robust-synchronization-loop (RSL) to track the phase and frequency of the grid voltage. A detailed analytical model of the proposed RSL algorithm is presented. Further, a state-space ... -
Re-synchronization of Universal Droop Control Distributed Generation Inverter to the Grid
Amin, Mohammad; Zhong, Qing-Chang (Chapter, 2019)The distributed generation (DG) inverters can operate in an islanded mode and a grid-connected mode. Under grid fault conditions, the inverter is disconnected from the main grid and operates in the islanded mode. When DG ... -
Real-time Volt-Var control of grid forming converters in DER-enriched distribution network
Wagle, Raju; Sharma, Pawan; Charu, Sharma; Amin, Mohammad; Gonzalez-Longatt, Francisco (Peer reviewed; Journal article, 2023)The growing installation of distributed energy resources (DERs) in a distribution network (DN) poses substantial issues related to voltage regulation. Due to constrained switching operation and slower response time, ... -
Resynchronization of Distributed Generation based on the Universal Droop Controller for Seamless Transfer Between Operation Modes
Amin, Mohammad; Zhong, Qing-Chang (Journal article; Peer reviewed, 2019)Distributed generation (DG) inverters can operate in the islanded mode and the grid-connected mode. When these DG inverters operate in the islanded mode, they often form a microgrid. The magnitude and phase of the main ... -
A Robust-Synchronization-Loop for Grid-Connected Distributed Generation Converters
Amin, Mohammad (Chapter, 2020)In this paper, a novel Robust-Synchronization-Loop (RSL) is proposed to track the phase and frequency of the grid voltage. The method can be widely applied to the grid-connected converters in integration of distributed ... -
Scalable Regenerative Power Converters for Accelerator Magnets
Haugen, Krister Leonart (Doctoral theses at NTNU;2023:413, Doctoral thesis, 2023)Electromagnets are used at The European Centre for Nuclear Research (CERN) in high-energy physics experiments to direct the charged particle beams. They store significant amounts of energy in the magnetic fields and are ... -
Seamless Operation Mode Change of the Inverter-based Microgrid with Robust Synchronization Loop
Marentes Ortiz, Rafael (Master thesis, 2021)I dette dokumentet presenteres en metode for sømløs endring av driftsmåten til mikronett koblet til nettet. Mikronett kan fungere koblet til rutenettet (rutenett-tilkoblet modus) eller frittstående (øy-modus), så temaet ... -
Self-synchronisation of wind farm in MMC-based HVDC system
Amin, Mohammad; Molinas Cabrera, Maria Marta (Chapter, 2016)The stability of an offshore wind power network connected through a high voltage dc (HVDC) transmission line is a critical problem since there is no direct connection to a strong ac collection (ACC) bus. Field experience ... -
Single-stage Grid-Connected PV System with Finite Control Set Model Predictive Control and an Improved Maximum Power Point Tracking
Vanti, Simone; Bana, Prabhat Ranjan; D'Arco, Salvatore; Amin, Mohammad (Peer reviewed; Journal article, 2021)The single-stage grid-connected photovoltaic (PV) topology has drawn attention in the recent years as it can reduce the overall losses and installation costs. However, an efficient control is necessary to operate such a ... -
Single-stage PV System With Multi-Objective Predictive Control Approach
Vanti, Simone; Bana, Prabhat Ranjan; Amin, Mohammad (Chapter, 2021)Model predictive control (MPC) as a current controller has gained attention in a grid-connected power electronic converter system. The multi-objective predictive control is in greater demand when the photovoltaic (PV) ... -
Small-Signal Stability Analysis of GridVille's Microgrid
Synstad, Kjell Petersen (Master thesis, 2022)Denne oppgaven har som mål å analysere mikronettet til GridVille, en studentorganisasjon som skal bygge et micronett for en landsby i Nepal, for å comme med praktiske forslag til hvordan å forbedre stabiliteten i energisystemet. ...