Arkan ahmed hussein | Tikrit University (original) (raw)

Uploads

Papers by Arkan ahmed hussein

National Programme on Technology Enhanced Learning (NPTEL), Feb 1, 2014

Tikrit Journal of Engineering Sciences, 2021

Voltage unbalance is an adverse global phenomenon impacting three-phase induction motor output. T... more Voltage unbalance is an adverse global phenomenon impacting three-phase induction motor output. Three-phase source voltage may become imbalanced in a variety of respects, while a balanced system preserves stable voltage magnitude and angles in three phases, but a completely balanced state is difficult to get. Imbalanced cases may differ in multiple ranges which may practically affect the motor. So, this work is an effort to analyze the operations with appropriate propositions. The output of a three-phase induction motor working with an imbalanced supply grid, MATLAB/SIMULINK is further used for simulation purposes and programming based on the asymmetrical component approach is adopted. A new design for system rerating is being proposed. As a case study, a 10 HP three-phase induction motor was used. The findings of the study show that to determine the output of the induction motor, positive voltage series must be respected under the voltage unbalance factor (VUF) or proportion voltag...

International Journal of Automation and Control, 2020

International Journal of Electrical and Computer Engineering (IJECE), 2020

An electric power system is usually exposed to unequal and variable loads across its three phases... more An electric power system is usually exposed to unequal and variable loads across its three phases, which leads to voltage unbalance and variation, making the three-phase voltages asymmetrical in nature at the distribution end. This problem is clearly evident in Iraq country, particularly with regard to the fluctuating voltage levels of electricity distribution during peak hours. Providing a three-phase motor with asymmetric voltages is badly affecting its working performance. Estimating the performance of this motor at steady-state under different conditions of voltage disturbances is investigated in this paper through Matlab simulation using Symmetrical component approach. The motor performance represented by active and reactive input powers, output put power, developed torque, power losses, efficiency and power factor is analyzed under full load conditions. Also, the steady-state power losses- and torque-slip characteristics at certain degrees of voltage unbalance have been calcul...

Indonesian Journal of Electrical Engineering and Computer Science, 2020

Power distribution network in Iraq still suffers from significant problems regarding electricity ... more Power distribution network in Iraq still suffers from significant problems regarding electricity distribution level. The most important problem is the disturbances that are occurring on lines voltages, which in turn, will negatively affect sensitive loads they feed on. Protection of these loads could be achieved efficiently and economically using the dynamic voltage restorer DVR when installed between the voltage source and load to inject required compensation voltage to the network during the disturbances period. The DVR mitigates these disturbances via restoring the load voltage to a pre-fault value within a few milliseconds. To control the DVR work, dq0 transformation concept and PID method with sinusoidal pulse-width modulation SPWM based converter had been used to correct the disturbances and thus enhance the power quality of the distribution network. The DVR performance was tested by MATLAB/Simulink with all kinds of expected voltage disturbances and results investigated the e...

Procedia Computer Science, 2019

Tikrit Journal of Engineering Sciences, 2018

This paper presents the study of intelligent controllers for Two-area multi-source interconnected... more This paper presents the study of intelligent controllers for Two-area multi-source interconnected power system model. The controller gains are optimized using Conventional method, GA and BAT algorithms and investigation is carried out for the best optimization method on the basis of dynamic performance and stability of the power system model. The power system model under investigation two area each area consists of thermal, hydro and Double Fed Induction Generator (DFIG) based wind unit with different participation factor in the total generation for their respective area. It has been observed that an appreciable improvement in the system dynamic performance is achieved using Bat algorithms for load frequency controller for multisource power system model as compared with conventional method and GA algorithm.

Procedia Computer Science, 2017

This paper presents the implementation of Proportional-Integral-Observer(PI-Observer) based state... more This paper presents the implementation of Proportional-Integral-Observer(PI-Observer) based state feedback control for Load Frequency of single area isolated power system model. The general application of PI-Observer has been realized in areas of robotic and mechanical system. The PI-Observer is used to estimate both the original states and the unknown inputs generally disturbances, modeling errors or the other non-linearities present in the system. The estimation error of the PI-Observer is gradually reduced by the proportional and integral feedback loop that appreciably improves the observer dynamics. A single area linear power system model is taken as a test case to implement the proposed methodology which is then compared with full state Luenberger observer based state feedback control for load frequency control of power system. MATLAB/SIMULINK is extensively used for modeling & simulation of power system and observer. The dynamic responses are compared and discussed on the basis of error dynamics, system states, peak overshoot and settling time. Lastly it was found that response of PI-observer based state feedback control scheme is quite appreciable as compared to Luenberger observer based state feedback schemes.

Procedia Computer Science, 2015

To attenuate the channel fading effects, a spectrum sensing policy for coordinating a cooperative... more To attenuate the channel fading effects, a spectrum sensing policy for coordinating a cooperative sensing is proposed by adding a Hopping Sequence (HS) module to the detectors based on a fuzzy logic system (FLS). A significant effect on the spectrum efficiency is the ability of a secondary user (SU) to utilize a frequency slot for transmission in an idle channel. Hence, the SU needs to sense the related spectrum in order to classify a licensed frequency band as occupied or vacant. To implement the HS module, two hopping methods are proposed-Random Hopping (RA-H) and Sequential Hopping (SE-H). An enhancement in detection probability over conventional cooperative sensing has been achieved.

SpringerPlus, 2014

This Paper presents the design of decentralized automatic generation controller for an interconne... more This Paper presents the design of decentralized automatic generation controller for an interconnected power system using PID, Genetic Algorithm (GA) and Particle Swarm Optimization (PSO). The designed controllers are tested on identical two-area interconnected power systems consisting of thermal power plants. The area interconnections between two areas are considered as (i) AC tie-line only (ii) Asynchronous tie-line. The dynamic response analysis is carried out for 1% load perturbation. The performance of the intelligent controllers based on GA and PSO has been compared with the conventional PID controller. The investigations of the system dynamic responses reveal that PSO has the better dynamic response result as compared with PID and GA controller for both type of area interconnection.

IOP Conference Series: Materials Science and Engineering, 2021

The DC motor has been commonly utilized in the industry although its maintenance is costly, more ... more The DC motor has been commonly utilized in the industry although its maintenance is costly, more than the induction motor. Consequently, speed control of DC motor has attracted considerable researches and different algorithms have evolved. All the traditional algorithms for the Proportional Integral Derivative (PID) controller provide initial practical values for (kp, ki, and kd) PID parameters, which are manually tuned to achieving the desired performance. The manual tuning is inaccurate and a hard job, which requests comprehensive experience of the problem domain. in this paper we proposed a new method to adjustment of the PID parameters to improve tracking performance of DC motor, also provides optimal stability through creating a hybrid PID-CSA predictive model for tuning parameters of the PID controller of DC motors based on Crow search algorithm. The empirical results are compared with four type of proposed PID-CSA versions [ Integral Squared Error (ISE), Integral Absolute Err...