Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"overhead line"”.
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Grid integration of wave energy & generic modelling of ocean devices for power system studies
… VAr compensator, the submarine cables and the overhead line. The power losses dissipated within the farm's electrical network are also evaluated. The feasibility of transforming a test site into a commercial site of greater rated power is investigated from the perspective of power quality and …
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Ökoeffizienz von Flexibilisierungsmaßnahmen in Energieversorgungsnetzen unter Berücksichtigung der Integration von Windenergie
… network area considering the implementation of overhead line temperature monitoring, the utilisation of a high temperature overhead line conductor (ACCR) and the network extension by realising a new corridor with TACSR high temperature overhead line conductors. It becomes clear that the …
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Intelligent Fault Location for Smart Power Grids
… apart from each other through long transmission lines with a tee-point, which is not supported by a substation nor equipped with a measuring device. The developed method overcomes the difficulties introduced by the discontinuity: the tee point. The second topology is a hybrid high voltage …
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Fast transient simulation of pinceti surge arrester model on a transmission line using ATP Software
… Over voltages problem at the transmission line can cause flashover voltage at the insulator string, power system disturbances and transformer failure. To prevent of insulator string and equipment of the power system from damaging effect by lightning overvoltage, metal oxide surge arrester …
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Technical consideration and impact of converting overhead power lines to underground power cables
In the modern era, overhead transmission lines become irrelevant in the development of new cities as underground cables become mandatory. Nonetheless, it is crucial to understand overhead line technology in order to model the next generation of power networks, as most of the power networks still …
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Numerical Investigations of the Thermal State of Overhead Lines and Underground Cables in Distribution Networks
… provide new insights into the thermal state of overhead line conductors (OHL) and underground cables (UGC) by using Computational Fluid Dynamic methods. An algorithm consists of building the geometry of the calculation domain, meshing, choosing a model, inputting initial conditions, initiation …
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Impulse ageing of polymeric materials
… strike to high voltage plant such as an overhead line. Both impulse events create travelling waves in the system, damaging insulation components and equipment. This work is concerned with the hypothesis that lightning impulses can lead to accelerated ageing of extruded polymeric cables. …
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Optimising AC electric railway power flows with power electronic control
… to control the reactive power drawn from the overhead line by each equipment. If the conditions at each locomotive or train could be fed back to a central control point, it is possible for a centrally located controller to calculate optimal values for the reactive power in each drive and to …
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Cable train : a platform for in-situ manufacturing of underground cable
… With the current state-of-the-art in HVDC, overhead lines (OHL) are several times cheaper than underground cables (UGC). However, OHLs have security risks and create substantial visual pollution, which has resulted in significant public opposition and lengthy delays in project permitting. …
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Provozování vložených kabelových vedení do DS vvn
Práce se zabývá návrhem části kabelového vedení, která je vložena mezi venkovní vedení distribuční soustavy VVN. Podstatou je popis přínosů, rizik a dopadu provozování těchto úseků z pohledu chránění a přechodových dějů. Práce také zahrnuje ekonomické porovnání provozních a pořizovacích nákladů …
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Enhanced weather modelling for dynamic line rating
Conventional approaches to dynamic line rating (DLR) forecasting provide single point estimates with no indication of the distribution of possible errors. Furthermore, most research related to DLR forecasting deals only with continuous or steady-state ratings while less attention has been given to …
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Automating the Generation of Geometric Information Models to Support Digital Twinning of Existing Rail Infrastructure
… comprising railway track structure and overhead catenary system elements in an established data format [i.e. Industry Foundation Classes (IFC)]. The research provided in this thesis first automatically and effectively segments labelled point clusters of railway elements in point cloud …
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The use of artificial intelligence techniques for power analysis
… such as multi-terminal circuits and composite overhead line and cable circuits. Also described, is how investigations have been made into an actual system fault that resulted in a failure of protection to operate. Techniques using digital fault records to replay a fault into a static model of …