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 (SEIG) showing dynamic loss of load performance. Analysis is carried out based of the d-q axis model, while considering the performance characteristics of the machine at constant ...
This thesis introduces full filled description for fifth-generation technology, here concentrated on massive MIMO technology in detailed at channel detection. However, channel illustrated carefully, described how to estimate and detect the channel. By using both algorithms least square and minimum mean square error for channel estimation while zero forcing and minimum mean square error for channel detection by analyzing and measure their performance using BER for MIMO 2x2, also it shows...
ABSTRACT Flexible AC Transmission Systems (FACTS) have been conceived to increase the transmissibility of electric power without the necessity of building new transmission iines. An important family of controllers proposed for FACTS are based on high power solidstate switches, such as the gate-tuni-off thyristor (GTO), which is presently rated at 6kV, 6kA. The FACTS controlier operates at the transmission voltage, in the order of 5ûûkV, and it rnust be mted at hundreds of MVA. The research...
ABSTRACT A Delta Modulated, Buck Type, Three Phase PWM Converter was constructed and tested. The converter is of the current source type and can be used in conjunction with current source inverters. The d.c. current is regulated by proportional feedback control loop. By delta modulation of the voltages across the a.c. terminaIs of the converter, the a.c. source currents are "indirectly" controlled so that the fundamental components remain in a predefined phase with respect to the source volt...
ABSTRACT Procedures are developed for designing high-speed, modular digital filters. The techniques presented here are based on the use of differences in the data signal in processing. The use of one-bit word, and the use of mapping of differentials in processing to produce a multiplication free, fast, and modular structured digital filters is considered in details in this thesis. A new algorithm for the digital filter is also proposed in the thesis which leads to the possibility of usi...
ABSTRACT This study has investigated the techniques for motion control of industrial robots with an application in which the robotics end-effector is required to track prescribed paths under conditions of changing payload masses, friction and elasticity in the gear boxes. In particular, the minimal configuration (the first three degrees-of-freedom) necessary for positioning the end-effector of a revolute industrial robot arm, MIMO, has been studied in terms of kinematics, dynamics and control...
ABSTRACT Extensive literature abounds on the evaluating techniques of load-point reliability indices of electrical power systems. On the whole, all the efforts of the published works have been the establishment of conventional methods to evaluate load-point reliability indices from raw component reliability data. Any system change that warrants new set of load-point reliability indices would require the whole process of reliability evaluation to be repeated. That is an inherent characteristic...
ABSTRACT Multiphase induction machine offers numerous advantages compared to the conventional three phase induction machine. It is an upgrade from the conventional three phase induction machine. By splitting the phase belt of a three phase, a sixphase machine is realised. The areas of application of multiphase machines are enormous, mostly where reliability is paramount. This research presents the modelling and implementation of a split phase induction machine with Saturation and skin effects...
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 speed axis. Both motors are mechanically coupled and are connected in parallel to the supply. It is shown that the resultant torque which...
ABSTRACT On the 27th June, 1995, the Engineering professionals, policy makers , representatives from various sectors and the Hon. Minister of Works and Housing - Major General Abdukarim Adisa gathered here to witness the launching of the NIGERIAN ASSOCIATION OF ENGINEERING CRAFTSMEN (NAEC). An Association that into existence in 1993 after the amended Decree 55/70 by 27/92 which empowered COREN to regulate engineering profession in Nigeria.
ABSTRACT Isolated or Stand-alone power systems with the use of renewable energy sources have become cost-effective and a convenient option for areas where grid connection is neither available nor feasible. A hybrid combination of Renewable Energy Technologies (RETs) is considered to be the best suited alternative to an expensive grid extension for remote areas around the world. This research focuses on creating a model for electricity generation from a mix of renewable resources (hydro, sol...
Abstract Radio spectrum access is important for terrestrial wireless networks, commercial earth observations and terrestrial radio astronomy observations. The services offered by terrestrial wireless networks, commercial earth observations and terrestrial radio astronomy observations have evolved due to technological advances. They are expected to meet increasing users’ demands which will require more spectrum. The increasing demand for high throughput by users necessitates allocating addit...
ABSTRACT This work focused on Evaluating the Performance of the Unified Power Flow Controller (UPFC) on Fault Current Limitation in the Nigerian 330kV Power Network. The SIMULINK model of the Nigerian 330kV system was developed. The model of the UPFC was developed and integrated into the power system model. The proportional integral (PI) control parameters of the UPFC was optimized using genetic algorithm. Results from simulation carried out showed the versatility of the UPFC in the protecti...
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 the vehicle. This work reports the six-step operation of the constant volts/hertz (V/f) control technique for voltage fed induction motor drives. Mathematical equations supporting the principle is discussed and the drive is modell...