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Hybrid renewable energy systems (HRES) have become more and more popular, especially for isolated regions. Various renewable energy resources are utilised to produce energy for different usage. This paper discusses the design of HRES for the Ha'apai island group. Possible renewable resources for electricity generation are investigated and the optimum system configuration at the lowest capital expenditure...
We present an extension of a model predictive control approach for microgrid energy management. We take into account electricity costs, power consumption, generation profiles and power and energy constraints. Uncertainty due to variations in the environment (wind speed), failures and subsequent repairs of the generator, as well as battery lifespan limitations are taken into consideration. Simulation...
Isolated and small electricity consumption locations such as Islands are not providing enough foundation for grid extensions to deliver electricity to the localities. Therefore, most of the Islands are using stand-alone generators to deliver power to the consumers. However, this not only increases the cost of energy generation but also increases the threat of global warming and makes them susceptible...
This paper examines the economic viability of stand-alone, household-sized renewable energy technologies, namely wind generator and solar photovoltaic (PV) for application in remote and rural areas of South Africa. Three reference technologies are chosen. These are two solar PV systems for solar conditions and one wind turbine. It is found for all regions that levelized costs of PV energy are lower...
Since 1887 wind has been a reliable source of power in order to address the global challenges of clean energy, climate change and sustainable development. Availability of wind has been always a matter of concern. And economically viable windmills depend most strongly on the quality of wind resource. This wind resource is available from nature. It can be achieved by many other ways. Moving bodies always...
In this paper available power alternatives for Stand Alone Power Systems (SAPS) for telecom applications are analyzed and compared. The first part of the paper is an overview of the main energy supply and storage technologies that can be successfully used in a Radio Base Station (RBS). In the second part of the paper, a software tool that has been developed to simulate the behavior of hybrid energy...
The amount of the conventional energy sources is decreasing day by day on earth. To avoid the energy crisis, the incorporation of the use of renewable energy sources is highly required. For decentralized or remote areas, where grid connection is almost not possible, renewable energy generation system coupled with diesel engines can be a reliable and optimized source of energy. In this study, a remote...
In order to take advantage of wind resource which is not rich in Shaanxi northern region and the annual average wind velocity is a little more than 4m/s, this paper focused on researching the comparison of theoretical potential application of vertical axis wind turbines (VAWT) and horizontal axis wind turbines (HAWT) in Northern Shaanxi. Wind velocity distributions were calculated by the Rayleigh...
In the last decade, several research groups and companies around the world have been developing a new class of wind generators, aimed at harnessing the energy of winds blowing at high elevation above the ground. This kind of technology is usually referred to as Airborne Wind Energy (AWE) or High-Altitude Wind Energy. All of the proposed solutions exploit the high-speed flight of tethered wings, or...
The utilization of renewable sources in power generation and system deregulation are two major changes the power system are undertaking. Different evaluation models are needed in order to incorporate renewable generation in the existing power system analysis. In deregulated power system, the impacts of renewable generation penetration are not only on the physical operation, but also on economic operation...
This paper presents analysis of electricity generation using stand-alone hybrid renewable energy resources for typical household in remote area situated in the eastern Indonesia. In the previous study, the optimum sizing problem is solved with PV/battery/wind-hybrid system without any generator addition. In this study, gasoline generator is added as a non-renewable resource option for 3 hybrid system...
Escalating diesel prices and to a lesser extent a desire to reduce global warming gasses, have caused most mobile operators to seriously start looking at alternatives to standard diesel electric set on remote sites. This paper investigates the possibility of using a hybrid Photovoltaic-Wind power system to supply Base Transceiver Station load in the Democratic Republic of Congo. The Hybrid system...
The main objective of the this study is to determine the optimum size of systems able to fulfill the requirements of remote sites located in Hajer Bani Hameed in the north of Oman, Masirah Island and Mothorah area in the south of Oman. The methodology applied provides a useful and simple approach for sizing and analyzing the hybrid systems using HOMER. The aim is to identify a configuration among...
This study is aimed at finding the prospects of wind energy utilization for decentralized applications in Sultanate of Oman. The study is based on an economical comparison for small power applications between diesel engine generators sets and wind turbines at the selected sites. It is for representative rural areas where wind regime is high. Also, the study extends to carrying out an economic comparison...
With the continuous effort of exploiting wind energy, a higher penetration of wind power will be integrated into networks in the form of distributed generation. In order to well plan the integration of wind power and the network, the randomness of wind power as well as its influence to the whole distribution networks should be considered. As a result, traditional optimal planning approach for distribution...
In Thailand, according to the Power Development Plan (PDP 2007), during the year 2007-2021, the government of Thailand plan to have the most economic power generation resources yet reliable and least environmental impact. At the present time, in addition, the emerging energy crisis resulting from an uncertainty price of crude-oil and the emerging global warming crisis results from carbon dioxide emission...
The energy shortage and environment pollution is attracting more and more attention with the social development. Hence it is important to develop new energy and renewable energy that are bio-energy, wind energy, solar energy, small waterpower, tide energy, terrestrial heat energy, and hydrogen energy and so on. The research of distributed power system with the solar and wind power is the leading domain...
There is a growing interest for the use of small-scale wind turbines at buildings. In most situations the deployment of existing (small les 5 kW) wind turbines will not be very successful due to the fact that they are not adapted to the complex wind environment. Several novel wind turbines have been developed to be able to extract a large amount of energy from these urban environments. This paper...
This paper presents an innovative wind/PV/diesel hybrid system implemented in three remote islands in the Republic of Maldives. The design methodology and preliminary results are presented. It is expected that the newly developed and installed system will provide very good opportunities to showcase high penetration of renewable energies using state of the art wind turbines, photovoltaic modules and...
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