Author Archives: Nea Guinea

‘Electrification of rural areas in developing countries’

Abstract Subject of this thesis is to study and review the best practices of rural electrification technologies in developing countries and to perform a simulation for the electrification of a small community in the Dejen District of Ethiopia. The Homer … Continue reading

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‘Real-time simulation of off-grid hybrid systems’

Abstract In recent years, the integration of Renewable Sources of Energy in hybrid islanded grids has been significant, thus it is imperative to develop power control techniques to ensure the stable operation and reliability of system. In this diploma thesis, … Continue reading

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‘Design of axial flux permanent magnet generators for optimum turbine power matching of locally manufactured small wind turbines in direct battery charging applications’

Abstract The object of this thesis is the study and simulation of the connection of small wind turbines in battery based systems and the creation of a simulation that maximizes the energy production, based on the optimal cable cross-section and … Continue reading

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‘Acoustic measurements of locally manufactured small wind turbines’

Abstract Subject of the present thesis is the study of the acoustic noise of a locally manufactured small wind turbine and the effect of current harmonics that are created by the use of uncontrolled diode bridge rectifiers in battery connected … Continue reading

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‘Distributed manufacturing for rural electrification – 3D printing runner cups for pico-hydroelectric application’

Abstract The lack of access to electricity is still a huge issue in various regions around the world. Especially in rural areas many people are negatively affected. Renewable energy technologies like micro- or pico-hydroelectric turbines can offer a solution to … Continue reading

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‘Design optimization of axial flux permanent magnet generators using a soft magnetic powder composite iron core for locally manufactured pico-hydro plants‘

Abstract In this work, axial flux permanent magnet generators are studied as parts of locally manufactured small hydro turbines in off-grid systems. The majority of these generators are manufactured today without an iron core. Despite the drawbacks of the iron … Continue reading

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‘Stability and accuracy of PHIL simulation for testing distributed generation’

Abstract This diploma thesis presents a technique for simulating and testing of power devices in real time with real laboratory equipment. This technique is called Power- Hardware-In-the-Loop (PHIL) and is a novel tool for testing as it features the interconnection … Continue reading

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‘Applying local and coordinated voltage control at networks with distributed generation using real-time simulation’

Abstract This diploma thesis examines and compares the two basic categories of voltage regulation methods in distribution networks, local voltage control and coordinated voltage control. Voltage control is necessary in distribution networks due to the voltage rise phenomenon that is … Continue reading

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July 2015 – 350W small hydro turbine with an iron powder core for battery charging

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July 2015 – Neodymium magnet generator for a 6m rotor SWT for battery charging

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