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Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
This paper presents a technique of fault feature extraction, detection and classification of short circuit faults in a power distribution network. A reduced 88 kV power distribution network is modelled in Digsilent Power Factory. Transient fault current signals of various types of faults are then subsequently obtained through an Electromagnetic Transient (EMT) study on the model. A Discrete Wavelet...
East Africa Power Pool (EAPP) is a proposed regional interconnection for centralizing energy resources and facilitating power wheeling between the Eastern Africa geographical areas. Synchronous tie lines have been used in the established interconnections so far. However, asynchronous interconnection is preferred since there high Renewable Energy (RE) penetration in the EAPP. HVDC technology, particularly...
Renewable Energy (RE) units especially grid connected Wind and Solar PV which have no rotational inertia are effectively displacing the conventional generators and their rotating systems. This reduces both the cost of generation and environmental effects. However, this has implications on the frequency stability in that frequency dynamics become faster with low inertia. This makes frequency control...
In this paper, Frequency Response Analysis simulations of a three-phase transformer were conducted via Finite Element Analysis and Matlab software. The contribution of this work is the authenticity of the equivalent Simulink model in eliminating 50 Hz frequency, leaving the purely pulse signals. The results were further verified statistically using F-Test and T-Test statistical techniques. F-test...
A scheme to predict transient stability status following a disturbance is presented. The scheme is activated upon the tripping of a line or bus and operates as follows: Samples of frequency deviations of all generator buses are obtained using a sampling frequency of 32 samples per cycle. For each generator bus, the maximum frequency deviation within the first two samples is obtained. A vector is then...
Recent architectures for the advanced metering infrastructure (AMI) have incorporated several back-end systems that handle billing and other smart grid control operations. The non-availability of metering data when needed or the untimely delivery of data needed for control operations will undermine the activities of these back-end systems. Unfortunately, there are concerns that cyber attacks such...
Distributed renewable power generation is a way to advancing affordable clean energy to remote locations far from the grid system. Solar energy is abundant everywhere across Africa hence socioeconomic life could be better with simple dispatchable distributed power infrastructure using cheaper, less complex DC systems and devices. People need to be empowered to reduce poverty, stop rural to urban migration...
This paper presents transmission grid reliability modeling and assessment that is critical to system reinforcement and expansion. This study explored an analytical approach for application on sub-Saharan African grids, which are fraught with effective expansion planning challenges or know-how. In this study, application of delivery point and system reliability concepts was explored and demonstrated,...
Improved electricity product development is becoming more significant to the business performance of electricity transmission companies. Despite the fact that the term improved/new product development is not new, very few studies have investigated the effect of improved electricity product development on the business performance of a public electricity transmission company, most especially in a developing...
This paper presents a unique and efficient artificial neural network (ANN) based fault detection, classification and location on part of the Nigerian 132kV transmission line. The objective is to evaluate the performance of ANN based relays connected at both ends of the lines using feed-forward non-linear supervised back propagation algorithm with Levenberg-marguardt network topology. Using the PSCAD/EMTP...
Wind turbine designs and production is an advance high-tech technology when considering design features from different manufacturers. The design of a wind turbine gearbox is demanding owing to loading and environmental circumstances in which the gearbox must function, Hence, the need for gearless wind turbine designs. As a replacement for gearbox, gearless wind turbine technology can be used, this...
Wind energy has recently become the most cost-effective and environmentally friendly amongst other renewable energy resources. However, since wind resource is intermittent in nature, the wind power output is inconsistent. Therefore, a control system needs to be implemented to ensure that maximum power is extracted from the wind resource at a wide range of wind speeds to optimize the performance of...
The demand of energy is drastically increasing now days mainly in developing countries like Ethiopia. In connection, wind energy is one of the promising renewable energies sources with the most commonly used Doubly Fed Induction Generator (DFIG). The DFIG's stator is directly connected to the grid, whereas the rotor is tied via dual back-to-back Pulse Width Modulation (PWM) converters. Its active...
Power system restoration continues to be a major challenge for many power systems in sub-Saharan Africa. Hydropower generation also remains as one of the major sources of power in this region. However, many power systems supported by hydropower generation in this region suffer from frequent power system blackouts, which have detrimental implications on the power system and its users. This paper focuses...
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