Abstract This thesis aims to extract d-axis machine parameters of a 214 MVA high-speed turbogenerator using well-established offline techniques. MATLAB/SIMULINK tool has been utilized to model the generator and perform sudden short-circuit (SSC) tests. Because constant speed operation of the generator is vital consideration for the accuracy of SSC tests for parameter extraction, this thesis has employed an arrangement of 2 DC motors operating alongside a drive system, which is configured to ...
ABSTRACT This work proposes a switching technique for cascaded H-Bridge (CHB) cells. A 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 proposed concepts, it is now possible to generate equal average switching signal patterns in all the constituting power semiconductor switches. This results in equal swi...
ABSTRACT The dynamic simulation is one of the key steps in the validation of the design process of the motor drive systems and it is needed for eliminating inadvertent design mistakes and the resulting error in the prototype construction and testing. A quality mathematical model of induction machine based on the dynamic equations and D-Q transformation technique is presented in rotor reference frame and a computer simulation of a 7.5kW three phase induction motor was carried out based�...
ABSTRACT This thesis develops a generalized formulation, based on the electromagnetic potential theory and the thin-wire concept, of the radiation problem,
ABSTRACT Short circuit modelling and parameter extraction of a synchronous generator entails development of a mathematical model of three phase short circuit of a turbo generator and the study of its characteristics or envelops at short circuit under constant speed and saturated conditions.. The transient parameters have a significant impact on the magnitude of the fault currents generated within the machine during an event such as a 3 phase short-circuit. Power system designers routinely use...
Version:0.9 StartHTML:0000000105 EndHTML:0000007189 StartFragment:0000000141 EndFragment:0000007149 Short circuit modelling and parameter extraction of a synchronous generator entails development of a mathematical model of three phase short circuit of a turbo generator and the study of its characteristics or envelops at short circuit under constant speed and saturated conditions.. The transient parameters have a significant impact on the magnitude of the fault currents generated within th...
ABSTRACT A general model for the e-beam induced decomposition of covalent and ionic inorganic solids is outlined.
Abstract Electric Vehicle (EV) technology is one of the steps in battling climate change through electrification of transport systems. Great advances in energy to size and energy to cost ratios have presented a great opportunity allowing all auto manufacturers to jumped for the idea of electrification as the future of transportation. The journey for better charging technologies is still a very important area of research. Among the main challenges in electrification of transport is inadequate ...
Abstract In traditional Internet of Things (IoT) systems, users are unable to authorize and/or deauthorize the collection of user data. Hence, the problem of the absence of user autonomy in IoT systems. The project aims to tackle this problem by suggesting a human-centered privacy-by-design option in the design and implementation of IoT systems. It aims to prioritize the need for the privacy of the user in designing IoT systems. It proposes to do this through the provision of user autonomous ...
ABSTRACT A vehicle tracking system is any technology that can be used to access the location of a vehicle; either in real time or offline. However, for many car owners, especially on the continent of Africa, vehicle tracking is a luxury which only a few people can afford. Many people are struggling to get a car in the first place. Analysis of vehicle theft data done in South Africa showed that most of the vehicle theft in the Southern African country are as a result of poor security systems. ...
Abstract Automatic Three Phase Changer is considered one the most important element in the power distribution system as it works to reduce the problem during faulty condition time and also protecting high voltage to the consumption voltage. To achieve maximum efficiency of this phase faulty the stability of power consumption on the distribution center has a main role. This thesis aims to design, simulate and develop automated three phase changer by running different place. The system works a...
Abstract My project is to improve JIT store management system from manual to automated system. Which is used to avoid problem faced by store keeper when store material manually. Store is the place where many varieties of materials are kept for the purpose of work. So at a time of storage is hard to write in document all material listing by their name, id, model, price and quantity; and is also boring to search specific material from whole material for human being but is easy for computer ...
The growing gap between electric power generated and that demanded is of utmost concern especially in developing economy, hence calling for measures to argument the existing power generated of which DG is a more viable aspect to explore in curtailing this challenges; although been confronted with issue of location and sizing. This research applied Adaptive neuro fuzzy logic technique to optimize DG location and size. A 24 bus radial network was used to demonstrate this process and having a su...
Fuzzy logic, being a very robust artificial intelligence technique, was employed to forecast short term load in this work. The algorithm was demonstrated with the help of seven months average daily load data collected from Power Holding Company of Nigeria (PHCN). The outcome realized from the model or simulation illustrate that the projected forecasting technique, which propose the use of weather alteration such as temperature and humidity, gives load forecasting results with substantial prec...
The growing concern for the need to reduce the gap between power generated and power consumed in Nigeria is on the increase. Many measures and policy have been geared by Nigeria Electricity Regulatory Commission and Ministry of Power to revamp the generation aspect of the country power sector but the impact is yet to be felt as the amount of power still generated is far below par compared to other countries. Nigeria average power generation stands at an average of 5800 MW. With the call to...