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The first solar car racing named as the World Solar Challenge was organised in Australia aiming to trigger the development of solar powered vehicles by researchers all over the world, and so do, various technologies have emerged targeting to make solar powered vehicles perform similar to fuel powered vehicles. Nevertheless, such vehicles still have limitations in terms of energy management technology,...
Climate change attracted widespread attention to shift towards environmentally friendly energy sources such as photovoltaics. Considering the facts that there are large numbers of DC loads that are used in today's buildings, the existing infrastructure is an AC power system, and the PV is a DC source, there will be power losses in the DC-AC-DC conversions. Therefore, the concept of using a DC MicroGrid...
The complexity of power systems and the change of demand load at the consumer make it necessary to control the voltage to avoid any unnecessary voltage drop beyond the limits allowed within the international standards and achieve optimum energy efficiency. This paper introduces a simple method that can regulate the voltage of a system without the sophisticated electronic devices. The method that controls...
On behalf of the Technical Program Committee of the First Workshop on Smart Grid and Renewable Energy (SGRE2015), it is our pleasure to present the proceedings of this workshop held in Doha, Qatar.
Wind farm layout orientation plays an important factor to reduce the total wake loss and hence increase the capacity factor of the wind farm. Different wind farms layout design optimization techniques are widely used and classified into five different types including, Pattern Search Algorithm (PSAs), Gradient Search Algorithms (GSAs), Greedy Heuristic Algorithms (GHAs), Simulated Annealing Algorithms...
This paper presents the analysis of the impact of weather conditions on the maximum electricity demand in Qatar during the whole year 2012. It points out the maximum daily air temperature as the most influential climate (meteorological) parameter. Correlation between maximum daily temperature and maximum daily electricity demand are also indicated and analyzed. It is noticed that there is a linear...
The extensive use of Distributed Generators in Electrical and power systems made it a must to explore its functionality and the issues related to their connection to the grid. One of the main issues is unintentional islanding, which has been considered and studied for many years since it has serious consequences on electric systems and line workers safety. Therefore, islanding detection methods is...
The main objective of this study is to conduct an optimal micro-siting of 1kW wind turbine to provide electricity for the eco-house project at Sultan Qaboos University (SQU). The study utilizes the Numerical Weather Prediction models data to provide the required wind information. WAsP application is used to calculate the wind climatology and the annual energy production. It was found the closest potential...
The differential protective system establishes the main protection against short circuits occurring on transformer windings. This protective system should operate rapidly when internal faults occur. However, it should not operate under nonfault conditions such as a flowing inrush current. In digital differential relays, differential currents or other required signals are sampled and processed according...
This paper deals with a novel transformerless inverter topology having high efficiency, low leakage current and no zero crossing distortions are encountered. In fact, the proposed topology is based on the conventional full bridge topology with an extra AC bypass branch to short circuit the load when the zero voltage of the control is applied. In this way, the current returning from the filtering circuit...
Accurate wind forecast at a wind farm is an essential process in wind energy industry and marketing. Numerical Weather Prediction (NWP) models can be used but they provide wind forecast as a single value for a given time horizon. Therefore, forecasting wind speed as a deterministic value doesn't represent the uncertainty of the wind speed forecast. Ensemble NWP forecast can be used to calculate the...
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