Raaed Hassan - Academia.edu (original) (raw)

Papers by Raaed Hassan

ITM web of conferences, 2022

The work in this paper presents the performance analysis of the reduced component count converter... more The work in this paper presents the performance analysis of the reduced component count converter which is the 5-Level Active Neutral Point Converter (5LANPC). This 5-level converter has been configured by stacking the traditional 3-Level Neutral Point Converter with the Flying Capacitor converter. Two types of control algorithms were considered and compared to explore the performance of the 5LANPC. The first algorithm was based on the Phase-Disposition-Pulse Width Modulation (PD-PWM), while the second one was based on the Alternate Phase Opposition Disposition-Pulse Width Modulation (APOD-PWM). These algorithms are used to determine the required voltage level and according to the required level the state of the switches is selected through a simplified voltage balance algorithm. This voltage balance algorithm deals with the redundant switching states to maintain the voltages of the 5LANPC capacitors at a specified level. The comparison between these two modulation strategies was performed by simulation based on MATLAB/Simulink package. Simulation results showed compelling outcomes involving the two techniques concerning the voltage and current characteristics, as well as the equilibrium in the capacitor voltages. By comparing the simulation results, it was found that the performance of the system is relatively better using the PD-PWM strategy.

Engineering and Technology Journal

The implementation of monitoring, controlling, and archiving system with data communication based... more The implementation of monitoring, controlling, and archiving system with data communication based on Bluetooth technology is described. Design and implementation of a temperature sensing and power line frequency measurement system is presented. The application has been accomplished using Bluetooth USB dongle. One of the Bluetooth enabled PC acts as a server. The implementation process consisting of application architecture design, system requirement, software design, hardware design, establish Bluetooth connection, and visualization of measurement data is described in detail. Experimental results show that the designed system is more reliable and easy to use.

Maǧallaẗ al-handasaẗ wa-al-tiknūlūǧiyā, Jun 1, 2012

Flexible ac transmission system (FACTS) can provide control more than conventional control and ac... more Flexible ac transmission system (FACTS) can provide control more than conventional control and achieve fast control response time, STATCOM is a shunt FACTS device it is used to voltage control and increase the performance of the system. In this paper STATCOM is used to improve the voltage magnitude and stability for the Iraqi (400KV) super grid network byusing MATLAB/SIMULINK. STATCOM is connected to Iraqi (400kv) super gridnetworkwhich is consisting of twenty four buses, eleven generators, eleven step up transformers fromeach generator side, twenty step down transformers from each load side and twenty loads.The loads variation through the seasons of the year causesdrop voltage on the buses of the network.To return the voltage to the rated value (400kv) STATCOM is used for this purpose. STATCOM provides suitable reactive power to the network to compensate the drop voltage on the buses, in the same time when the STATCOM improves the voltage there are large oscillations. These oscillations are handled by using power oscillation damping (POD) and proportional integral (PI) controller with the STATCOM.Each of thepower oscillation damping (POD) and Proportional integral (PI) controller is connected inside current regulator of the STATCOM device.The performance of the (POD) and (PI) in cancelation the oscillations is compared.

ITM Web of Conferences

Induction motors (IM) that are driven using the conventional direct torque control algorithm (DTC... more Induction motors (IM) that are driven using the conventional direct torque control algorithm (DTC) suffer from vital drawbacks which are high ripples in the torque and flux. These ripples result due to the use of a look-up table and hysteresis comparators which causes variable switching frequency. Moreover, the use of a traditional two-level inverter leads to the production of low-quality voltage and current. The work presented in this paper proposed a modified control system to overcome these drawbacks. The proposed control system is based on the use of the space vector modulation-based DTC algorithm (DTC-SVM) for driving three-phase IM via a three-level T-Type inverter. The conventional DTC-SVM algorithm has been modified to match the work of the proposed inverter. The modification process was based on the mapping of the standard DTC-SVM algorithm in the space vector of the three-level inverter. The conventional and the modified control systems are implemented using MATLAB/Simulin...

International Review of Applied Sciences and Engineering

The demand for automation using mobile robots has been increased dramatically in the last decade.... more The demand for automation using mobile robots has been increased dramatically in the last decade. Nowadays, mobile robots are used for various applications that are not attainable to humans. Omnidirectional mobile robots are one particular type of these mobile robots, which has been the center of attention for their maneuverability and ability to track complex trajectories with ease, unlike their differential type counterparts. However, one of the disadvantages of these robots is their complex dynamical model, which poses several challenges to their control approach. In this work, the modeling of a four-wheeled omnidirectional mobile robot is developed. Moreover, an intelligent Proportional Integral Derivative (PID) neural network control methodology is developed for trajectory tracking tasks, and Particle Swarm Optimization (PSO) algorithm is utilized to find optimized controller's weights. The simulation study is conducted using Simulink and Matlab package, and the results con...

2022 Second International Conference on Advances in Electrical, Computing, Communication and Sustainable Technologies (ICAECT)

Journal of Techniques, 2009

Journal of Techniques, 2011

2021 IEEE 9th Conference on Systems, Process and Control (ICSPC 2021), 2021

In this work, the development of the control algorithm for multilevel converter using Xilinx syst... more In this work, the development of the control algorithm for multilevel converter using Xilinx system generator has been made. A reduced component count five level converter is proposed and configured using three level flying capacitor converter stacked with a three level diode clamped converter. This converter topology is known as Asymmetric Stacked Multilevel Converter. The proposed converter possesses nine effective states including redundant states to achieve the five levels output voltage. The Phase Disposition Pulse Width Modulation with active voltage balancing algorithm is implemented. This control algorithm takes advantage of these redundant states for generating the output voltage as well as to ensure that the capacitor voltages are balanced. Two platforms are employed for design and simulate this system, the first one was the MATLAB/SIMULINK. Xilinx System Generator is used as a second platform for implementing the control algorithm as a digital module. The simulation resul...

Journal of Techniques, Jun 30, 2021

Received Feb 6, 2021 Revised Jun 26, 2021 Accepted Jul 7, 2021 Multilevel inverters (MLI) play an... more Received Feb 6, 2021 Revised Jun 26, 2021 Accepted Jul 7, 2021 Multilevel inverters (MLI) play an important role in AC applications and are undergoing continuous development in topology and control. In higher levels inverters, conventional MLIs have high components count which calls for modification of these topologies to obtain the same number of levels with fewer components to reduce cost and size. Balancing of the capacitors voltages is crucial for the operation of the MLI and it becomes more challenging in higher levels. This paper presents an active voltage balancing strategy for a reduced switch count five-leve topology which is the asymmetric stacked multilevel inverter (ASMLI). The ASMLI uses fewer components than the conventional MLIs when used in their five-level configuration. The proposed active voltage balancing strategy uses simple measurements and logic to assure a balanced capacitors voltages during steady state and transients. The performance was examined and compar...

European Journal of Electrical Engineering, 2021

In recent decades, multi-level converters have become popular and used in many power systems appl... more In recent decades, multi-level converters have become popular and used in many power systems applications. Compared with conventional converters, multi-level converters contribute to reducing the voltage stress on the switching devices and enhancing the power quality delivered to the load. In this paper, the study of the five-level diode clamped multilevel converter based static synchronous compensator has been accomplished. Model Predictive current control strategy which a type of modern control algorithms was employed for driving the proposed compensator. The suggested five level converter controlled by model predictive current control is firstly examined to verify that this control algorithm is appropriate for achieving the desired performance. Then the proposed converter and control combination is employed and simulated as a static synchronous compensator in distributed power system. Moreover, in order to examine the robustness of this compensator, the load status is suggested t...

---------------------------------------------------------------------***-------------------------... more ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Power Electronic Transformer became more interested in recent years as an alternative to the conventional transformer. Although its behavior is identical to the conventional transformer, power electronic transformer is smaller in size and provides capability for controlling and enhancing the power quality of electrical systems. In this paper, a new configuration of power electronic transformer is considered and examined to perform identical behavior of traditional transformer in electrical distribution system. The proposed topology of this transformer consists of three stages these are; input stage, isolation stage and output stage. The input stage employs three-phase Vienna rectifier for rectifying the AC voltage source and with proper control it keeps input power factor near unity with low harmonic distortion of input currents. Configuring of isolation stage achieved by using single phase inverter connecting to the input of high frequency transformer which its output connected to a single phase uncontrolled rectifier. Three-phase 5-level diode-clamped inverter is utilized as an output stage. Performance of the proposed structure is verified by simulation which indicates high quality results from power utility and harmonic distortion points of view.

Model predictive control (MPC) is one of the control strategies used recently to control power co... more Model predictive control (MPC) is one of the control strategies used recently to control power converters because of its advantages of handling nonlinear functions, fast dynamic response, and eliminating the modulators and PI regulators. However, it has one disadvantage: it requires high processing power to operate correctly due to the high computational burden on the controller. This paper presents a new method of controlling the performance of grid-tied multilevel inverter functioned as STATCOM based on finite control set model predictive current control (FCS-MPCC). This control strategy is employed to control a five-level asymmetric stacked multilevel inverter (ASMLI) and coupled with the network through LCL-filter. Multilevel inverters suffer from capacitors voltages unbalance problem, and LCL-filters require an efficient damping method to function appropriately; these two challenges are included in the cost function of the FCS-MPCC. The FCS-MPCC strategy is constructed in two m...

The work presented in this paper concerned with the design and hardware implementation of the Net... more The work presented in this paper concerned with the design and hardware implementation of the Network on Chip based MultiProcessing System on Chip prototype. The design process is performed using Very High speed integrated circuit Hardware Description Language (VHDL) and simulated using ISE 14.1 software package. The structure of the Network on Chip (NoC) considered in this paper is a two dimension (2D) mesh topology network which consists of 3 by 3 nodes. Each node consists of three components, these are, Processing Element (PE), Network Interface (NI) and Router (R). The nodes of the proposed network were divided into master and slave nodes, while each type has its own PE and NI; the router performs the same function in two types. The core of each node is the router which is responsible for directing the data from the source to the destination, therefore and in order to reduce the complexity of the network as well as the gate count, a minimized structure of the router has been des...

In electrical power systems there are many problems, from these problems voltage drop, over volta... more In electrical power systems there are many problems, from these problems voltage drop, over voltage and instability. These problems are solved by using FACTS technology. Flexible AC transmission system (FACTS) can provides better control than conventional control and achieves fast control time response; therefore FACTS controllers play an important role in power system stability enhancement. STATCOM is a shunt FACTS device which is used for voltage controlling and increasing the performance of the system. In this paper STATCOM is used to improve voltage magnitude and stability of electrical network by using MATLAB/SIMULINK. To show its effectiveness a prototype of electrical network has been chosen which consists of five buses, three generators and four loads. Simulation results show a robust improvement in network with STATCOM. If a three phase to ground fault occurs between buses (3&4) there are oscillations after clearing fault. To reduce these oscillations power oscillations dam...

Diyala Journal of Engineering Sciences, 2013

Genetic Algorithms (GAs) are used to solve many optimization problems in science and engineering ... more Genetic Algorithms (GAs) are used to solve many optimization problems in science and engineering such as pattern recognition, robotics, biology, medicine, and many other applications. The aim of this paper is to describe a method of designing Finite Impulse Response (FIR) filter using Genetic Algorithm (GA). In this paper, the Genetic Algorithm not only used for searching the optimal coefficients, but also it is used to find the minimum number of Taps, and hence minimize the number of multipliers and adders that can be used in the design of the FIR filter. The Evolutionary Programming is the best search procedure and most powerful than Linear Programming in providing the optimal solution that is desired to minimize the ripple content in both passband and stopband. The algorithm generates a population of genomes that represents the filter coefficient and the number of taps, where new genomes are generated by crossover and mutation operations methods. Our proposed genetic technique ha...

International Journal of Electrical and Electronic Engineering & Telecommunications, 2021

The work presented in this paper aims to compare the effectiveness of different control strategie... more The work presented in this paper aims to compare the effectiveness of different control strategies to improve the performance of the three-phase Induction Motor (IM). The Conventional Direct Torque Control (CDTC) was employed as the first strategy for driving the IM. This control strategy causes high ripples in the IM's torque and speed due to the hysteresis comparators and a variable switching frequency due to the look-up table. A modified DTC strategy based on Space Vector Modulation (DTC-SVM) was chosen as a second strategy to enhance the performance of the IM using the two-level inverter. This method, which leads to the reduction of the torque and speed ripples and achieves constant switching frequency. As the multi-level inverter becomes most popular than the two-level inverter, the third strategy is devoted to adopting the three-level flying capacitor inverter (TLFCMLI) -based DTC-SVM. The third strategy uses the method of mapping the multi-level space vector based on basi...