Qusay Salem
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View article: Impact of Loads and Photovoltaic Uncertainties on Cascaded Failure in Transmission Networks of Future Power Grids
Impact of Loads and Photovoltaic Uncertainties on Cascaded Failure in Transmission Networks of Future Power Grids Open
The increase investment of renewable energy resources (RESs) into power systems, such as solar photovoltaics (PVs), introduces additional uncertainty in transmission line loading. This uncertainty adds challenges to cascading failure analy…
View article: Grid Forming Converters for Low Inertia Systems<b>-</b>Capabilities and Limitations: A Critical Review
Grid Forming Converters for Low Inertia Systems<b>-</b>Capabilities and Limitations: A Critical Review Open
The rapid integration of renewable energy sources into the power grid has resulted in the high utilization of power-electronics devices and operating power systems where inverter-based resources are dominated. Such a transition has led to …
View article: Voltage dip propagation in renewable‐rich power systems utilizing grid‐forming converters
Voltage dip propagation in renewable‐rich power systems utilizing grid‐forming converters Open
The growing integration of converter‐interfaced renewable energy sources (RESs) utilizing Grid‐Following (GFL) converters has displaced conventional synchronous generators (SGs) in central generation units. This shift presents challenges, …
View article: Issues and Challenges of Grid-Following Converters Interfacing Renewable Energy Sources in Low Inertia Systems: A Review
Issues and Challenges of Grid-Following Converters Interfacing Renewable Energy Sources in Low Inertia Systems: A Review Open
The integration of renewable energy sources (RESs) is a key objective for energy sector decision-makers worldwide, aiming to establish renewable-rich future power grids. However, transitioning from conventional systems based on synchronous…
View article: A Comparative Study between Reduced-Order and Switching Models of Grid-Following Inverter Interfacing Renewable Energy Sources
A Comparative Study between Reduced-Order and Switching Models of Grid-Following Inverter Interfacing Renewable Energy Sources Open
This paper presents a performance comparison between switching and reduced-order models of grid-following inverters. Different models have been developed to study the inverter’s operation using MATLAB and PSIM simulation tools. These model…
View article: Online Power Transfer Regulation Between Transmission and Active Distribution Systems for High-Voltage Support
Online Power Transfer Regulation Between Transmission and Active Distribution Systems for High-Voltage Support Open
View article: An implementation of an enhanced DG primary control equipped with fault detection scheme
An implementation of an enhanced DG primary control equipped with fault detection scheme Open
This paper proposes an enhanced primary control unit of the distributed generator inside the microgrid when the DG is grid-connected and when operated autonomously. The control methods needed for the DG inverter when operated in grid-conne…
View article: Application of Artificial Neural Network-Based Tool for Short Circuit Currents Estimation in Power Systems With High Penetration of Power Electronics-Based Renewables
Application of Artificial Neural Network-Based Tool for Short Circuit Currents Estimation in Power Systems With High Penetration of Power Electronics-Based Renewables Open
The increasing integration of Power Electronics (PE)-based renewable energy sources into the electric power system has significantly affected the traditional levels and characteristics of fault currents compared to the ones observed in pow…
View article: A novel monotonic wind turbine power-speed characteristics model
A novel monotonic wind turbine power-speed characteristics model Open
Major issues with logistic functions (LFs) in modeling wind turbine power-speed characteristics (WTPSCs) include: 1. low accuracy near cut-in and rated wind speeds due to lack of continuity; 2. difficulties in fitting their parameters beca…
View article: Relationship between Fault Level and System Strength in Future Renewable-Rich Power Grids
Relationship between Fault Level and System Strength in Future Renewable-Rich Power Grids Open
The fault level is used as a simple indicator for scanning the system strength in power systems. To an extent, this has proven its efficacy in classical power systems based on synchronous generation (SG). However, power electronics-based r…
View article: A performance comparison of series power flow control structures in a smart microgrid
A performance comparison of series power flow control structures in a smart microgrid Open
This paper investigates the performance of various power control structures on a series power flow controller comprised as transformerless H-bridge inverter under different operating conditions. This power flow controller connects the main…
View article: Development of New Admittance Matrix for Newton-Raphson Power Flow in Distribution Networks
Development of New Admittance Matrix for Newton-Raphson Power Flow in Distribution Networks Open
Network modelling is a critical step in the analysis of distribution networks. It is used to relate the input currents and voltages with the output currents and voltages. This work aims to construct a new admittance matrix for distribution…
View article: Enhanced dynamic performance of grid feeding distributed generation under variable grid inductance
Enhanced dynamic performance of grid feeding distributed generation under variable grid inductance Open
Controlling weak grid-connected systems is very challenging. In transient, frequency and voltage oscillations may lead to voltage and/or frequency stability problems and finally lead to system collapse. During steady-state operation and at…
View article: A new method to fit logistic functions with wind turbines power curves using manufacturer datasheets
A new method to fit logistic functions with wind turbines power curves using manufacturer datasheets Open
The literature contains different methods for estimating logistic functions parameters to fit the power‐speed characteristics of a wind turbine (WT). However, their disadvantages are: (1) they require a large amount of supervisory control …
View article: Operation Mode Transition of a Low-Voltage Single Phase Microgrid based on Synchronization Controller
Operation Mode Transition of a Low-Voltage Single Phase Microgrid based on Synchronization Controller Open
In case of system contingencies, improving the continuity of the electrical supply by islanding capabilities is of great interest.Besides, reconnecting the power network after an islanding event is also an important issue for maintaining t…
View article: Detailed analysis of grid connected and islanded operation modes based on P/U and Q/f droop characteristics
Detailed analysis of grid connected and islanded operation modes based on P/U and Q/f droop characteristics Open
This paper presents a thorough control structure of the distributed generators inside the microgrid during both grid-connected and islanded operation modes. These control structures of the DGs voltage source inverters are implemented in sy…
View article: Dynamic Performance Evaluation of Inverter Feeding a Weak Grid Considering Variable System Parameters
Dynamic Performance Evaluation of Inverter Feeding a Weak Grid Considering Variable System Parameters Open
Interfacing a weak grid imposes challenges on distributed generators (DGs). These challenges include transient frequency and voltage dynamics that can destabilize the system. Accordingly, this paper investigates the grid stiffness based on…
View article: Sensitivity Analysis for Voltage Stability Considering Voltage Dependent Characteristics of Loads and DGs
Sensitivity Analysis for Voltage Stability Considering Voltage Dependent Characteristics of Loads and DGs Open
The sensitivity analysis becomes particularly critical for voltage stability analysis due to the fluctuation in power outputs of renewable energy resources. Besides, impacts of different load modeling and the operation mode of Distributed …
View article: Loss Minimization of Traction Systems in Battery Electric Vehicles Using Variable DC-link Voltage Technique -- Experimental Study
Loss Minimization of Traction Systems in Battery Electric Vehicles Using Variable DC-link Voltage Technique -- Experimental Study Open
A novel variable dc-link voltage technique is proposed to reduce the traction losses for electrical drive applications. A 100-unit cascaded multilevel converter is developed to generate the variable dc-link voltage. Experimental measuremen…
View article: A transformerless H-bridge inverter as a bidirectional power flow controller in a microgrid based P/V droop control
A transformerless H-bridge inverter as a bidirectional power flow controller in a microgrid based P/V droop control Open
In modern power distribution grids, the evolution of new power control methodologies in microgrid applications is growing increasingly due to the large demand for DG sources integration. However, with the rising level of the DG sources pen…
View article: A Novel Line Current Control Strategy to Control the Real Power Flow at PCC using H-bridge Inverter
A Novel Line Current Control Strategy to Control the Real Power Flow at PCC using H-bridge Inverter Open
This paper presents the power flow control between the main grid and the microgrid in low-voltage distribution network using H-bridge inverter. Controlling the real power flow in the line using the H-bridge inverter is investigated by impl…
View article: Decentralized power control management with series transformerless H-bridge inverter in low-voltage smart microgrid based P/V droop control
Decentralized power control management with series transformerless H-bridge inverter in low-voltage smart microgrid based P/V droop control Open
This paper presents the power flow control between the main grid and the microgrid in 400 V low-voltage distribution network using series transformerless H-bridge inverter. This series converter is attached directly in series with the line…