RESOURCE RESERVATION SCHEME WITH RETRIAL FOR IMPROVED GSM NETWORK PERFORMANCE

RESOURCE RESERVATION SCHEME WITH RETRIAL FOR IMPROVED GSM NETWORK PERFORMANCE ABSTRACT The need to increase the number of channels in a limited radio spectrum while covering a large area in a mobile cellular network has lead to the use of various cell design techniques. With an increased number of channels, handover calls can be dropped …

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SHORT-TERM ELECTRIC POWER FORECAST IN THE NIGERIAN POWER SYSTEM USING ARTIFICIAL NEURAL NETWORK

SHORT-TERM ELECTRIC POWER FORECAST IN THE NIGERIAN POWER SYSTEM USING ARTIFICIAL NEURAL NETWORK ABSTRACT This thesis is a study of short-term electric power forecasting in the Nigerian power system using artificial neural network model. The model is created in the form of a simulation program written with MATLAB tool. The model, a multilayer time delayed …

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SLIDING MODE DIRECT TORQUE CONTROL OF THREE PHASE INDUCTION MACHINE APPLICABLE IN ELECTRIC VEHICLES

SLIDING MODE DIRECT TORQUE CONTROL OF THREE PHASE INDUCTION MACHINE APPLICABLE IN ELECTRIC VEHICLES ABSTRACT The electric vehicle relies on electric motors for propulsion. In this report, the case was made for the induction motor as a suitable candidate for this tractive application. Being able to control the electric motor invariably implies efficient control of …

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SYNTHESIS OF A HYSTERESIS MOTOR

SYNTHESIS OF A HYSTERESIS MOTOR ABSTRACT This work presents the synthesis of a motor with hysteresis motor torque-speed characteristic. The machine is synthesized from a conventional squirrel cage induction motor (SCIM) with high rotor resistance to leakage reactance ratio and a polyphase transfer field (TF) reluctance effect machine with an inverted torque-speed characteristics about the …

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THE INFLUENCE OF ROTOR CAGE WINDING ON THE PERFORMANCE OF A TRANSFER FIELD MACHINE

THE INFLUENCE OF ROTOR CAGE WINDING ON THE PERFORMANCE OF A TRANSFER FIELD MACHINE ABSTRACT This work presents the influence of rotor Caged winding on the performance of a Transfer Field (TF) machine. The transfer field (TF) machine comprises two identical machines that are integrally wound and mechanically coupled together but with their pole axes …

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THERMAL MODELLING OF INDUCTION MACHINE USING THE LUMPED PARAMETER MODEL

THERMAL MODELLING OF INDUCTION MACHINE USING THE LUMPED PARAMETER MODEL ABSTRACT Temperature rise is of much concern in the short and long term operations of induction machine, the most useful industrial work icon. This work examines induction machines mean temperatures at the different core parts of the machine. The system’s thermal network is developed, the …

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HIGH POWER LOSS REDUCTION IN ENUGU ELECTRICAL DISTRIBUTION SYSTEMS USING HEURISTIC TECHNIQUE FOR CAPACITOR PLACEMENT

HIGH POWER LOSS REDUCTION IN ENUGU ELECTRICAL DISTRIBUTION SYSTEMS USING HEURISTIC TECHNIQUE FOR CAPACITOR PLACEMENT ABSTRACT This project involves research on loss reduction in a distribution system. The Enugu distribution system is the case study. The type of losses, the causes of losses and methods of loss reduction in distribution system were presented. A method …

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IMPLEMENTATION OF A STUDENT INFORMATION DATABASE FOR DIGITAL BRIDGE INSTITUTE

IMPLEMENTATION OF A STUDENT INFORMATION DATABASE FOR DIGITAL BRIDGE INSTITUTE ABSTRACT Effective management of large amount and different types of data encountered in daily operations is a major challenge facing academic institutions. Traditional paper based operation is not only costly, but also ineffective. Based on the requirements of the Student Records Office, a student information …

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IMPROVED ENERGY EFFICIENCY USING FACTS-DEVICE TECHNIQUE- A CASE STUDY OF OGUI-ENUGU POWER DISTRIBUTION NETWORK.

IMPROVED ENERGY EFFICIENCY USING FACTS-DEVICE TECHNIQUE- A CASE STUDY OF OGUI-ENUGU POWER DISTRIBUTION NETWORK. ABSTRACT In this thesis, the objective is to determine the steady state operating condition of thirteen bus Ogui-Enugu Radial power distribution network. The steady-state was determined by finding out, for a given set of loading conditions, the flow of active and …

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IMPROVEMENT ON CONCURRENCY CONTROL IN A DISTRIBUTED DATABASE

IMPROVEMENT ON CONCURRENCY CONTROL IN A DISTRIBUTED DATABASE ABSTRACT The study was conducted of the Improvement on concurrency control in a distributed database. The objectives of the study are to ensure consistent and correct transaction, efficient data collection and management and recoverability of data in a distributed database. The Mysql relational database was employed in …

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INFLUENCE OF SALIENCY RATIO (XD-XQ) ON THE PERFORMANCE OF THREE-PHASE SYNCHRONOUS RELUCTANCE GENERATORS.

INFLUENCE OF SALIENCY RATIO (XD-XQ) ON THE PERFORMANCE OF THREE-PHASE SYNCHRONOUS RELUCTANCE GENERATORS. ABSTRACT In the study of the influence of saliency ratio (Lı/Lı) on the performance of a synchronous reluctance generator (SRG), this project investigates two typical generator rotor designs: Generator with cage and without cage otherwise known as cage and cageless rotor respectively. …

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MODELING AND PARAMETER EXTRACTION OF A214 MVA TURBO-GENERATOR DRIVEN DY DC MOTORS DURING OFF-LINE SHORT-CIRCUIT

MODELING AND PARAMETER EXTRACTION OF A214 MVA TURBO-GENERATOR DRIVEN DY DC MOTORS DURING OFF-LINE SHORT-CIRCUIT ABSTRACT This thesis aims to extract d-axis machine parameters of a 214 MVA high-speed turbo-generator using well-established off-line techniques. MATLAB/SIMULINK tool has been utilized to model the generator and perform sudden short-circuit (SSC) tests. Because constant speed operation of the …

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NATURAL VARIABLE MODELING AND PERFORMANCE OF INTERIOR PERMANENT MAGNET MOTOR WITH CONCENTRATED AND DISTRIBUTED WINDINGS

NATURAL VARIABLE MODELING AND PERFORMANCE OF INTERIOR PERMANENT MAGNET MOTOR WITH CONCENTRATED AND DISTRIBUTED WINDINGS ABSTRACT Interior Permanent Magnet (IPM) motor is widely used for many industrial applications and has relatively high torque ripple generated by reluctance torque. Since the configuration of the stator has great influence on reluctance torque, different stator configuration is necessary …

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OPEN-LOOP VARIABLE VOLTAGE VARIABLE FREQUENCY CONTROL OF THREE (3) PHASE INDUCTION MOTOR FOR AN ELECTRIC VEHICLE DRIVE

OPEN-LOOP VARIABLE VOLTAGE VARIABLE FREQUENCY CONTROL OF THREE (3) PHASE INDUCTION MOTOR FOR AN ELECTRIC VEHICLE DRIVE ABSTRACT This work presented an open loop variable voltage variable frequency (V/F) control of three phase induction motor for an electric vehicle drive. The major advantage of v/f is the ease of implementation. Simulation and practical implementation of …

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PERFORMANCE CHARACTERISTICS OF A TRANSFER FIELD MACHINE OPERATING IN THE ASYNCHRONOUS MODE

PERFORMANCE CHARACTERISTICS OF A TRANSFER FIELD MACHINE OPERATING IN THE ASYNCHRONOUS MODE ABSTRACT This thesis presents the performance characteristics of a Transfer Field (TF) machine. In this machine, the two component fields revolving in the airgap are of the same pole number and the speed of operation is inversely proportional to the sum of the …

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POWER SYSTEM COMPENSATION USING PASSIVE COMPENSATORS AND FACTS CONTROLLERS

POWER SYSTEM COMPENSATION USING PASSIVE COMPENSATORS AND FACTS CONTROLLERS ABSTRACT The study used passive compensators and FACTS controllers to achieve power system compensation by obtaining load flow of the Northern Nigerian 330kV transmission grid; determining the voltage magnitudes at the various buses; identifying the voltage violations and applying the passive compensators and FACTS controllers at …

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CONTINGENCY EVALUATION OF THE NIGERIAN 330KV TRANSMISSION GRID

CONTINGENCY EVALUATION OF THE NIGERIAN 330KV TRANSMISSION GRID ABSTRACT A single line contingency analysis and generator(s) outages were carried out on 330kV, 27-Bus power network using MATPOWER 4.1 embedded in MATLAB to carry out fast decoupled load flow studies in order to identify the voltage violation at various buses, determine power losses at the transmission …

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DERIVATION OF THE BANDWIDTH RESOURCE ALLOCATION IN AN ATM-BASED NETWORK

DERIVATION OF THE BANDWIDTH RESOURCE ALLOCATION IN AN ATM-BASED NETWORK ABSTRACT Asynchronous Transfer Mode (ATM) technology is the transfer mode for implementing a Broadband-Integrated Services Digital Network (B-ISDN). ATM defines multiplexing and switching techniques for broadband signals. Synchronous Optical Network (SONET) is employed in the B-ISDN backbone. The main objective of an ATM is to …

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DYNAMIC LOSS OF LOAD PERFORMANCE OF AN AUTONOMOUS SELF-EXCITED INDUCTION GENERATOR (SEIG)

DYNAMIC LOSS OF LOAD PERFORMANCE OF AN AUTONOMOUS SELF-EXCITED INDUCTION GENERATOR (SEIG) ABSTRACT The importance of Self-Excited Induction Generator (SEIG) cannot be neglected when it comes to low cost of maintenance requirement, low cost of operation, low operational cost, high reliability and availability. This dissertation presents a dynamic analysis of an autonomous Self-Excited Induction Generator …

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FORECASTING ACTIVE AND REACTIVE POWER AT A SUBSTATION TRANSFORMER IN DISTRIBUTION NETWORK

FORECASTING ACTIVE AND REACTIVE POWER AT A SUBSTATION TRANSFORMER IN DISTRIBUTION NETWORK ABSTRACT This work addressed the problem of forecasting active and reactive power at a substation transformer in a distribution system. Accurate power forecast is of great importance in power distribution planning, reactive power support control and intelligent power management. Due to the complexity …

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AN IMPROVED GAUSSIAN FILTER TECHNIQUE FOR BIOMEDICAL IMAGE PROCESSING- AN EARLY LUNG CANCER DETECTION TECHNIQUE

AN IMPROVED GAUSSIAN FILTER TECHNIQUE FOR BIOMEDICAL IMAGE PROCESSING- AN EARLY LUNG CANCER DETECTION TECHNIQUE ABSTRACT For accurate and high rate of lung cancer detection using image processing, an effective preprocessing technique is required. A quality preprocessing technique is necessary to ensure effective removal of noise that interferes with the features of the image and …

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AN INSULATION CO-ORDINATION PROCEDURE FOR POWER SYSTEM EQUIPMENT

AN INSULATION CO-ORDINATION PROCEDURE FOR POWER SYSTEM EQUIPMENT ABSTRACT Generally, for existing Insulation co-ordination studies the power system has been modeled either by deterministic mathematical techniques or by statistical methods. The shortcoming of the existing conventional mathematical technique of Insulation co-ordination analysis is that it assumes that the power system dynamics is linear. This makes …

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APPLICATION OF COMMON MANAGEMENT INFORMATION PROTOCOL (CMIP) IN ATM NETWORK BANDWIDTH ALLOCATION SYSTEM

APPLICATION OF COMMON MANAGEMENT INFORMATION PROTOCOL (CMIP) IN ATM NETWORK BANDWIDTH ALLOCATION SYSTEM ABSTRACT Asynchronous Transfer Mode (ATM) of transmission is designed as a Broadband Integrated Services Digital Network (B-ISDN) transfer mode that supports a wide range of traffic classes with diverse flow characteristics. ATM guarantees different quality of service (QoS) demands placed on a …

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COMPARATIVE ANALYSIS OF DISTRIBUTED POWER CONTROL ALGORITHMS IN CELLULAR NETWORK

COMPARATIVE ANALYSIS OF DISTRIBUTED POWER CONTROL ALGORITHMS IN CELLULAR NETWORK ABSTRACT
 Wireless Communication is one of the most active areas of technological development of our time. It covers a very wide array of applications that lead to an ever growing demand on the limited radio resources. Consequently, the need for efficient management of the limited …

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AN IMPROVED FAULT DETECTION AND PROTECTION SCHEME FOR A 200 MVA TRANSFORMER USING FUZZY LOGIC

AN IMPROVED FAULT DETECTION AND PROTECTION SCHEME FOR A 200 MVA TRANSFORMER USING FUZZY LOGIC ABSTRACT Condition monitoring of Electrical power equipment has attracted considerable attention for years. The aim of this work is to use Fuzzy logic (FL) Tool Box in building a simulation system that will diagnose all kinds of incipient faults, phase …

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AN ANALYTICAL APPROACH TO ANALOGUE-DIGITAL TRANSITION IN RADIO AND TELEVISION BROADCASTING

AN ANALYTICAL APPROACH TO ANALOGUE-DIGITAL TRANSITION IN RADIO AND TELEVISION BROADCASTING ABSTRACT The International Telecommunication Union (ITU) has directed some countries of the world to migrate from analogue to digital broadcasting service before June 17, 2015. This transition has many challenges which have been approached in many ad hoc ways by several countries. This study …

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A NOVEL APPROACH FOR POWER SYSTEM PROTECTION IN HIGH VOLTAGE POWER SYSTEM AT 132KV

A NOVEL APPROACH FOR POWER SYSTEM PROTECTION IN HIGH VOLTAGE POWER SYSTEM AT 132KV ABSTRACT In this thesis, a novel approach for the protection of transmission lines which utilizes only coefficient energy for both detection and classification is proposed. The fault current signals generated by workspace on MATLAB simulation model have been analyzed using Daubechie-4 …

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A HYBRID MODULATION SCHEME FOR CASCADED H-BRIDGE INVERTER CELLS

A HYBRID MODULATION SCHEME FOR CASCADED H-BRIDGE INVERTER CELLS ABSTRACT This work proposes a switching technique for cascaded H-Bridge (CHB) cells. Single carrier Sinusoidal PWM (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM circulation schemes are presented for this fundamental cascaded multilevel inverter topology. With these …

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A FAULT DETECTION AND PROTECTION SCHEME FOR A 200 MVA TRANSFORMER USING FUZZY LOGIC

A FAULT DETECTION AND PROTECTION SCHEME FOR A 200 MVA TRANSFORMER USING FUZZY LOGIC ABSTRACT Condition monitoring of Electrical power equipment has attracted considerable attention for years. The aim of this work is to use Fuzzy logic (FL) Tool Box in building a simulation system that will diagnose all kinds of incipient faults, phase to …

Read moreA FAULT DETECTION AND PROTECTION SCHEME FOR A 200 MVA TRANSFORMER USING FUZZY LOGIC

A CURRENT SOURCE INVERTER-FED CONSTANT AIR GAP FLUX CONTROLLED SQUIRREL CAGE INDUCTION MOTOR DRIVE

A CURRENT SOURCE INVERTER-FED CONSTANT AIR GAP FLUX CONTROLLED SQUIRREL CAGE INDUCTION MOTOR DRIVE ABSTRACT In this thesis, a current source inverter fed squirrel cage induction motor drive at constant air gap flux is presented. The drive scheme is conceived to take advantage of the short circuit withstand capability of the current source inverter and …

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A CLOSED LOOP PULSE WIDTH MODULATED VSI-BASED CONTROL OF SQUIRREL CAGE INDUCTION MOTOR

A CLOSED LOOP PULSE WIDTH MODULATED VSI-BASED CONTROL OF SQUIRREL CAGE INDUCTION MOTOR ABSTRACT This project presents a quality model of induction motor showing steady state and dynamic analysis using Volt/Hertz open loop, Volt/Hertz closed loop, Slip differences and constant flux methods. The main objective is to maintain the speed at constant rotor flux and …

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