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The paper seeks to design, test and implement a fast transfer scheme for an existing Alpha Olefins substation at Sasol Secunda, Mpumalanga Province, in South Africa. The aim of this design is to switch motor bus bars over to an intact back up supply should the main supply fail and to switch them back again when the main supply is restored. The switchover to the back up supply must be performed as...
The 132kV Arlington Traction Station is fed from the krooonstad Switch Station. The 132kV Arlington network is further broken down into 22kV feeders to supply rural substations like Steynsrus, Goedehoop and Klippan which are islanded networks without back feeds. These activities resulted in harmonic generations. A study conducted on the network quality of the 132kV network by the Eskom proved that...
Currently, Transport Vehicles (TVs) use Lead-Acid Batteries (LABs) for starting, lighting, igniting (SLI) and energy storage. Unfortunately LABs face significant performance failure rate due to over-charging, under-charging, degradation of protection systems amongst other issues. It is due to these reasons that the proposed research study seeks to enhance the performance of LABs for TVs (LABs-TVs)...
The paper reported a field survey that sought to examine the technical implications in the adoption of a Global System for Mobile communication GSM-based metering system in the New Juaben Municipality. Both simple random sampling and interview guide methods were used. The issues considered under the study were; understanding of a GSM-based metre reading, mobile phone penetration among consumers, reliability...
CdTe-based thin film solar cells have shown strong potentials as viable thin film solar cells for the future, due to several attractive material properties. Its direct bandgap, strong absorption coefficient, ease and multiple deposition methods have favored this material in solar cell research and manufacturing. However, the quality of these thin films, depend on the method and process of fabrication...
Under-frequency load shedding, rising electricity tariffs, environmental concerns and delays in constructing new power stations had plunged South Africa into darkness and constant need for load shedding. This has led consumers and producers alike to explore various energy generation options to assist the sector to meet its electricity demands whilst reducing their electricity needs. Renewable energy...
Eskom power plant portfolio comprises of a total installed capacity of about 45GW, being the dominant national electric utility in South Africa and one of the largest power operators in Africa. Eskom generates, transmits and distributes electric power across South Africa and a net exporter to some neighbouring countries through interconnections. Due to growth in load and daily increase in demand for...
The Nigerian Power System Network is presently characterized by poor reliability with respect to customer's uncertainty with respect to how long the electric power supplied can last before they are put on load-shedding or otherwise. Data was collated from the daily operational log books of five feeders emanating from the Transmission Company of Nigeria, Benin City, Nigeria. The reliability indices...
This paper presents industry best practices to optimize lifecycle cost of electric transmission and distribution (T&D) assets whilst maintaining asset integrity, functionality and operability. This qualitative study encompasses high voltage plant and equipment in the electric power transmission and distribution sector, and focusses on asset strategy, equipment evaluation and specification. Asset...
The purpose of this paper is to provide insight into Energy storage devices which will transform the way the world utilises, controls and dispatches electrical energy in the near future. With the increasing amount of renewable energy being injected into transmission and distribution grids and the rapid uptake of rooftop solar photo-voltaic installations in households, energy storage is unlocking a...
This paper proposed an intelligent approach to predict the biochar yield. The biochar is an important renewable energy that produced from biomass thermochemical processes with yields that depend on different operating conditions. There are some approaches that are used to predict the production of biochar such as least square support vector machine. However, this approach suffers from some drawbacks...
Synchronous generators are interconnected into the regional power transmission network to improve reliability, enhance the security of supply, trade of electricity and share the available natural resources for energy fuel supply. The interconnected power system experiences disturbances due to load variations and faults and causes stress on the generators to control and remain in synchronism. The study...
Access to energy is one of the primary cause contributing to the disparity between developed and developing nations. Nearly 600 million people in Africa lack access to electricity which majority of them residing in the sub-Saharan African (SSA) countries. Electricity consumption in SSA countries excluding South Africa is 153kwh/year. The current installed capacity is at 147 GW which is equivalent...
This paper presents an adaptive discrete wavelet transform (DWT) based genetic algorithm (GA) technique for automatic generation control (AGC) systems. The controller ensures a zero steady state error for frequency deviation, mitigates inter area oscillations between interconnected power system and damps out noise from the Area Control Error (ACE) signal. The non-orthogonal DWT with GA optimization...
Smart energy management is a key research area and many strategies that enable control between household appliances and multi-power switching have been examined. However, a limitation of such strategies is that they enable automatic control of household appliances to avoid electricity interruptions and employ renewable energy sources to reduce electricity costs. For proper energy management to be...
In this paper, we first will report on the global situation regarding energy efficiency within buildings in Morocco, a promising sector that allows a real progress in many terms. Thereby we will take an interest in the flow of thermal energy for energy efficiency. For this we will use modeling tools such as TRNSYS to analyze energy efficiency gain from building materials. Then we will simulate the...
Several utilities in Africa are planning to build Smart Distribution Management System (SDMS) to provide better customer service, improve reliability & quality of power supply and also improve commercial viability of their utilities. The SDMS architecture and design for each Utility has to be determined considering current operational status of distribution network, ability to mobilize resources...
The rise in penetration levels of distributed generation (DG) poses some challenges to distribution networks. This paper presents the results of an investigation into the effect of high DG penetration levels on thermal limits of distribution lines, and voltage rise at the point of common coupling. The study system used was the 16-bus UK distribution test system. The results obtained indicate voltage...
In light of the inadequate state of Nigerias power sector in comparison to the US, this paper proposes a plug-and-play microgrid concept or Microgrid-as-a-Service (MaaS) for application in an urban Nigeria setting. We focus on an islanded microgrid setup wherein the microgrid will not need the grid-connectivity functionality, ceteris paribus. Under the MaaS plaform, customers can switch between the...
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