Reza Barzegaran

RPower · Electrical Engineering

A generalized equivalent source model of AC machine for electromagnetic signature studies is proposed to provide the exact field solution without the need for using large numerical or analytical computation efforts. The model was created using a wire-modeling of the machine windings designed based on the electric displacement field and current dens...

In this paper a planar inductor based resonant circuit is designed for zero-current switching (ZCS) buck converter. The electromagnetic behavior of the design is analyzed by finite element (FE) methods for EMI interactions. A high frequency model for conducted EMI in the resonant circuit is obtained. To suppress the conducted EMI in the circuit, a...

An optimum equivalent electric machine model for 3-D finite element (3DFE) simulation and evaluation of radiated electromagnetic field emissions in a multi-machine environment is presented. A typical example of such systems includes electric motors and cable runs electric drives. Initially, the detailed geometrical model of the machine was simulate...

Power grids are endangered yearly by disasters that could well affect our livelihood. This paper investigates an AI (Artificial Intelligence) solution to understand better and ultimately predict disasters using the data from previously observed disasters and artificially generated data. The data is fed to the AI in the form of resiliency calculatio...

Cool-roofing systems with a high solar reflective index offer numerous benefits to buildings, occupants, and solar electric power generation systems. The proposed experimental cool roof-mounted solar project demonstrates how a cooler roof turbocharges solar photovoltaic system by not only boosting power and energy, but also extending the lifespan o...

Cool-roofing is effective in reducing cooling load and increasing the energy balance of buildings with high solar reflectance throughout the cooling season. This article proposed a large-scale of a resilient Microgrid, along with comprehensive thermal analyses for residential building, focused on cool roof-mounted solar photovoltaic system. This pr...

This paper presents the design and implementation of a Time‐Sensitive Networking (TSN) protocol‐enabled synchronized measurement‐based monitoring system for microgrids. The proposed approach synchronizes and prioritizes the communication nodes, allowing it to transfer ultra‐high three‐phase sampled data and phasors. TSN is achieved by Quality of Se...

Purpose This paper aims to develop a comprehensive model of a magnetic sensor array that will be operational for a multitude of electric components in continuous and nonintrusive condition monitoring (CM) or in readiness assessment (RA) applications. Design/methodology/approach A universal nonintrusive model of a flexible antenna array is introduc...

High-frequency wireless power transfer (WPT) technology provides superior compatibility in the alignment with various WPT standards. However, high-efficiency and compact single-phase power switching systems with ideal snubber circuits are required for maximum power transfer capability. This research aims to develop an inverter using Gallium Nitride...

Significant improvements of the DC-DC converters create the straightforward method to control the speed of the DC motor. One of the important DC motors is the Brushless DC motor which is utilized in various electrical fields. This paper focuses on the control at different speeds for a Brushless DC motor. In order to make the proper voltage to run t...

This paper presents the design and implementation of a Multi-level Time Sensitive Networking (TSN) protocol based on a real-time communication platform utilizing Data Distribution Service (DDS) middleware for data transfer of synchronous three phase measurement data. To transfer ultra-high three phase measurement samples, the DDS open-source protoc...

The steadily rising efficiency together with the accuracy of prediction in solar photovoltaic (PV) energy requires a deterministic reliability in the realistic PV characteristic’s prediction subject to climatic changes. This empirical-based research validates IEC 61853 and improves output power prediction of a solar PV module with considering nomin...

Penetration of wind units in Microgrid (MG) imposes remarkable challenges on MG operation. Demand Response Programs (DRPs) and Energy Storage Units are used by MG operators to address these challenges. This paper analyzes the effect of running the Time-of-Use Demand Response Program (TOU-DRP) on an isolated MG by considering different capacities of...

Higher operational requirements in cyber–physical microgrid system stress the electrical system and may push it to the edge of stability. Therefore, prognosis of the imminent failures is vital. Accessing stray electromagnetic waves of power components helps in power system protection and non-intrusive prognosis of electric components faults in a cy...

This paper investigates the influence of various Halbach arrays permanent magnets (PMs) on the electromagnetic performance of a radial flux machine with outer rotor topology. The static analysis is performed using a 2-D finite-element analysis (FEA) of six different machines with different Halbach array-based orientations. The gap consideration bet...

This paper presents the design and implementation of an innovative standalone AC/DC microgrid configuration with focus on electricity water nexus. The proposed configuration includes photovoltaic (PV) generator, hybrid fuel cell system, storage system, and both DC and AC loads. One of the most important advantages of this microgrid is waste water t...

This paper utilizes a Pareto-based, three-dimensional (3-D) analysis to identify complete and partial shading of photovoltaic (PV) systems for an complicated urban environment, where unusual shape of PV and installation topology is studied. The Pareto optimization attempts to minimize losses in a certain area with an improved output energy and with...

Monitoring and fault detection of the power components in power grid through radiated fields are proposed in this paper. The frequency response of electromagnetic radiated fields from the components was measured through low-frequency antennas and signal analyzer. Proper algorithms are developed for the identification of the components as well as th...

This study presents a global sizing design optimisation of a permanent magnet synchronous generator (PMSG) using the three-dimensional finite-element analysis (3D FEA). To build an optimal parametric model structure, the efficiency improvement of the PMSG is taken as the main objective, where iron and copper losses were minimised. A dual-level resp...

Electric components in numerous applications (particularly wind generation) are not straightforwardly accessible for monitoring. Therefore, the monitoring and protection through voltage/current measurement may not be dependable since the current value passes numerous segments to reach the observing element. Accordingly, finding an unusual phenomeno...

This paper investigates a three-dimensional finite-element (3D-FEA) thermal analysis based on an embedded cooling system with various number of ducts for the outer-rotor permanent magnet synchronous machines (PMSMs). The segmented stator core due to closed-slot topology is the reason of a high temperature-rise at this core. The application-oriented...

In this paper, the influence of gap consideration on load identification under various Halbach-array-based topologies (HABOs) is investigated while the system is on-duty. The load characteristics of a radial flux generator with closed-slots and the exterior rotor topology is discussed, where the effect of eddy-currents are observed. This comparativ...

This paper presents a hybrid model–based control algorithm that combines Model Predictive Control (MPC) and Sequential Action Control (SAC) deployed in a high-speed drive for Brushless DC (BLDC) motor by using a DC-DC converter with Gallium Nitride (GaN) switches. GaN FETs are selected because of their higher speed and lower power loss as compared...

Customers play a key role in running Demand Response Programs (DRPs). Incentive-based DRP is defined as changes in costumers’ consumption level in response to incentive programs outlined by systems to reduce the daily load demand peaks. Optimal operation of microgrids is one of the most important challenges of power system operators. Decreasing the...

Charging time and power transfer efficiency are the main challenges of wireless power transfer for electric vehicles. It is proposed in this paper to resolve both issues using the transformer induction concept as well as adaptive robotic technology. To this end, an autonomous robotic arm equipped with several sensors is mounted to the vehicle’s und...

The low-frequency electromagnetic radiated field is utilized in this paper for the purpose of condition monitoring and fault diagnosis of electric components. The main purpose is to build arrays of receiving coils that can detect and monitor the radiated electromagnetic field around the electric component and accordingly utilizing the measured fiel...

An innovative method to reduce electromagnetic interference of an electric machine drive has been simulated and experimented in this paper. In this method, matrix converter with wide band gap switches is built. This control system not only makes the controlling smooth, but also have the capability to reduce the electromagnetic interference since th...

There is a developing enthusiasm for electric vehicle (EV) innovations because of their lower fuel utilization and greenhouse emission output. Integrating EV’s with highway wireless power transfer (WPT) technology can appropriately reduce charging time and possibly expand their travel distance. There are several issues with the current WPT technolo...

Recent advancement in the field of electrical technology and cyber system (mainly based on the internet) has brought the key towards accepting and challenging all the issues regarding load management, demand side management, energy management, and efficient allocation of energy, transparency and ease of use of data management and security. This res...

Advent of Wireless Power Transfer led to fade plugin electric vehicle, have an effective driving distance and decrease battery storage. It is proposed to build the robust and reliable dynamic wireless power charging for electric vehicle. Although there has been great enhancement in static wireless power transfer for energizing electric vehicles, su...

This paper introduces the application of an iterative SVD-Krylov algorithm for dynamic model reduction of power systems. The method is a two-sided projection combining advantages of the singular value decomposition based and the Krylov-based model reduction methods. The significance and accuracy of the method are numerically investigated. The full...

In this paper, three algorithms for dynamic model reduction of power systems are compared. The significance and accuracy of approximate bi-simulation, balance truncation, and modal truncation technique are investigated. While the bi-simulation method is applied to power systems for the first time, its detailed formulation is derived for a constrain...

Developing the control algorithms of electric machine drives for less noise and harmonics is proposed here for design improvements. Modern control algorithms for electric machine drives are implemented, and their radiated magnetic fields are measured and imported into a digital signal processing unit. The measurement was implemented using magnetic...

Developing the control algorithms of electric machine drives for less noise and harmonics is proposed here for design improvements. Modern control algorithms for electric machine drives are implemented and their radiated magnetic fields are measured and imported into a digital signal processing unit. The measurement was implemented using magnetic f...

In this paper, detailed physics-based modeling of a power converter drive is proposed. The 3D finite element (FE) modeling of a power inverter was developed and analyzed. An approach in physical modeling of the switching activity of the inverter in FE is proposed. In addition, the solver was modified and implemented for analyzing nonlinear material...

This paper describes an investigation of a new control method for Sparse matrix converters (SMC) using Silicon Carbide (SiC) switches fed direct torque control (DTC) of permanent magnet synchronous motor (PMSM) drives. Using this control method, it is possible to combine the sparse matrix converters with VSI-DTC, which reduces the torque ripple, do...

This paper reviews the physics based modeling based on the electromagnetic stray fields and interference in the electric power network. The low frequency as well as high frequency equivalent source modeling of the power components for the study of radiated and conducted electromagnetic compatibility were implemented. The 3-D finite element analysis...

Monitoring and fault detection of the electric machine drives through the stray fields are proposed in this paper. The frequency response of the stray electromagnetic field from several combination of machines is measured through low frequency antennas and signal analyzer. The proper algorithms are developed for the identification of the components...

This paper presents an optimization process to reduce the Electromagnetic Interference (EMI) of high frequency power converters through the optimum placement and orientation of magnetic components on the printed circuit board (PCB). Transducers and microcontrollers implemented in control circuits are sensitive to the effects of EMI. The developed t...

In this paper, a study of the radiated electromagnetic behavior of a power inverter is proposed. An inverter is simulated using three dimensional finite element (FE) modeling with a new approach in simulating the switching activity. The inverter is connected to an electric motor drive. For verification, the same setup was experimentally tested and...

Purpose – In this paper, modeling of the XLPE cable for electromagnetic signature study at a far distance is proposed. The paper aims to discuss these issues. Design/methodology/approach – Due to the very small ratio of the dimensions of cables to the dimensions of the whole system, using actual geometry of the cables with all layers in this study...

This paper presents a method for the identification of winding failures in induction motors. The types of failures include unbalanced currents flowing into the motor and short-circuit of the winding. The radiated magnetic field of a typical induction motor was studied while various types of failures applied to the machine. The implementation was pe...

Finding the location of partial short-circuit in electrical machines enables the operator to fix specific winding segments before it expands into a larger fault causing major down time. This paper investigates the identification process for locating this type of fault in the windings of a machine through radiated electromagnetic field signatures. I...

A 3-D finite-element (FE) optimized equivalent source numerical model for the analysis of low frequency electromagnetic field signatures in electric drives is proposed. An example electric drive system including a synchronous generator, an induction motor and power cables connecting a load is used to implement the model. The arrangement of the syst...

This paper presents a method based on the wavelet package decomposition (WPD) for condition monitoring of the permanent magnet synchronous motor controlled by sensorless control algorithm. In the proposed method, the wavelet package is used to decompose the frequency spectrum of the motor current. The measured motor current, contains the harmonic c...

A model for electrical machines useful for radiated electromagnetic field studies in a multi-source environment is proposed. The various aspects of electromagnetic signature are considered. This model was created from a representative rectangular prism carrying a set of unbalanced currents in its branches. The geometry and the currents of the equiv...

In this paper we develop an equivalent model for electrical machines which is useful for the study of radiated electromagnetic fields in a multi source environment. The proposed models are created from a representative cylinder loops and cubes carrying a set of currents in the cylinder branches as well as voltages at the nodes of the cubes or loops...

This paper deals with a planar inductor design for optimal size reduction of z-source inverters. The smallest possible inductor size is realized through the utilization of the Finite Element method (FEM) and genetic algorithms. Operating condition of the Z-source inverter was set to a point such that it works with a smaller inductance value. We stu...

Short-circuit is known as one of the most important basis of the damages in power transformers, weakness of insulation, and many other reasons which would cause these minor faults. To prevent these minor faults to be a major fault, a sensitive and accurate technique in fault detection is used in this paper. Frequency response analysis as a well-kno...

Detecting and removing minor faults in power transformer winding is essential because minor faults may develop and lead to major faults and finally irretrievable damages occur. In this paper in order to detect the position of short-circuit in the winding, frequency response of the input impedance of a power transformer is analyzed. Common short-cir...

In this paper, a sensitive and accurate technique in detecting minor internal fault of transformer winding is used. Frequency response analysis, as a well-known and sensitive method of fault detection, is coupled with finite element analysis, which is one of the most accurate methods of simulation. A sensitive transfer function has been noticed in...

Frequency response analysis is deemed as a suitable diagnostic method in identifying electrical and/or mechanical faults of power transformers that is extended recently. Sensitivity and accuracy of measured FRA is very effective in detecting faults that may not be investigated in power transformers comprehensively. In this paper, parameters that ha...

In order to study the position of internal short-circuit in power transformers, the high frequency model for winding should be set up. In this paper a special methodology is used for establishing the high frequency model of transformer winding. This model topology is involved to reflect the internal electromagnetic behavior of such transformer. The...