http://hdl.handle.net/10628/96 Wed, 22 May 2013 12:40:29 GMT 2013-05-22T12:40:29Z http://hdl.handle.net/10628/312 Title: An investigation on the effects of feeder outages and non-linear loads on 11kV ring distribution network efficiency. Authors: Kapali, David; Gope, Gideon Abstract: This study investigates the impact of power quality problems on the efficiency of a ring distribution network. The paper focuses on the effects of outage and harmonics on the distribution network efficiency and the practical implications on power system economics and reliability. An 11 kV ring distribution network was modeled and simulated in DigSilent PowerFactory (Demo version) 14.0.512 software package. Five case studies were conducted on the network for normal operation conditions and abnormal conditions (outage and harmonics). A methodology to estimate the technical losses (economic losses) in the distribution system was developed and used as a basis for determining the network efficiency. A load flow based analysis was carried out on the distribution system to determine the voltage and current profiles under normal and abnormal conditions. It emerged that the loss of feeder cables or lines in the network has an adverse impact on the efficiency of the network. This raises the question on the existence and the need of an optimum supply configuration. It also puts an increased focus on the need of improved reliability engineering in distribution systems as the costs of failures could be high. The authors conclude that the efficiency of a ring distribution network is affected adversely during contingency (outage and harmonics). The degree to which the efficiency is affected depends on the initial optimal design configuration and the nature of the disturbance or contingency condition. Preventative steps that can be taken to “harden” equipment and systems to PQ problems are also suggested. Sat, 01 Jan 2011 00:00:00 GMT http://hdl.handle.net/10628/312 2011-01-01T00:00:00Z http://hdl.handle.net/10628/256 Title: Optimising learning outcome via project-baased learning in the production of technicians. Authors: Oyedokun, Zacchaeus Abstract: The Department of Electrical Engineering runs a multi-exit level programs where student can obtain a National Diploma or the Bachelor of Technology. One of the requirements of the program is for graduates to be industry-ready and globally marketable. Project-based learning was adopted in the Department to produce graduates that are nationally relevant, industry compliant and globally marketable. Design Project 3 is one such course that gives the graduates an apex outcome and a cutting edge advantage in the market place. This was designed to improve employability of the graduates. Description: Paper presented at the 9th International Conference on Engineering Education, M3G-23, 23-28 July 2006, San Juan PR. Sun, 01 Jan 2006 00:00:00 GMT http://hdl.handle.net/10628/256 2006-01-01T00:00:00Z http://hdl.handle.net/10628/97 Title: Can mouse and keyboard chase out chalk and blackboard in engineering education? Authors: Oyedokun, Zacchaeus; Oyedokun, Comfort Abstract: The face-to-face method of instruction has dominated the teaching arena from time immemorial. However the rapid advances in information, computer and communication technology is rapidly changing the mode of knowledge transfer from teacher to learner. Remote classrooms and the virtual environment has seen the distribution of learning in time and space. However, there are challenges that must be faced in order for this mode of teaching to permeate all corners of knowledge transfer. There has been some resistance to adopting virtual classroom in practical-intensive, equation-laden courses. This paper discusses strategies that may be employed to surmount the hurdles. It shows that developing a digital learning suite is a prerequisite to successful floating of laboratory and/or equation intensive courses. The digital learning suite is a prerequisite to floating engineering courses in a virtual learning platform where the chalk and blackboard has been replaced by mouse and keyboard. Description: NOLNet Open and Distance Learning Conference (1st : 2005 Aug. 30 - Sep. 1 : Windhoek, Namibia) Sat, 01 Jan 2005 00:00:00 GMT http://hdl.handle.net/10628/97 2005-01-01T00:00:00Z