Search for dissertations about: "Lennart Söder"
Showing result 6 - 10 of 51 swedish dissertations containing the words Lennart Söder.
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6. Planning Models for Single Wire Earth Return Power Distribution Networks
Abstract : The high cost of grid extension to rural areas, often characterized by scattered communities with low load densities, requires the use of low cost electrification technologies to ensure economic viability. In Single Wire Earth Return (SWER) power distribution networks, the earth itself forms the current return path of the single phase system leading to significant cost savings on conductors, poles and poletop hardware compared to conventional systems. READ MORE
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7. Distributed Stochastic Programming with Applications to Large-Scale Hydropower Operations
Abstract : Stochastic programming is a subfield of mathematical programming concerned with optimization problems subjected to uncertainty. Many engineering problems with random elements can be accurately modeled as a stochastic program. In particular, decision problems associated with hydropower operations motivate the application of stochastic programming. READ MORE
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8. Hydropower Area Equivalents : Reduced Models for Efficient Simulation of Large-Scale Hydropower Systems
Abstract : With over 4000 TWh yearly electricity production worldwide, hydropower plays an important role in many power systems. Unlike many other renewable energy sources, hydropower has a certain degree of controllability and high levels of flexibility over several time scales. READ MORE
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9. Ice Storm Modelling in Transmission System Reliability Calculations
Abstract : In this thesis a new technique of modelling non-dimensioning severe weather for power system reliability calculations is developed. The model is suitable for both transmission and distribution networks and is based on geographically moving winds and ice storms. READ MORE
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10. Energy Management in Smart Cities
Abstract : Models and simulators have been widely used in urban contexts for many decades. The drawback of most current models is that they are normally designed for specific objectives, so the elements considered are limited and they do not take into account the potential synergies between related systems. READ MORE