Search for dissertations about: "independent protection"
Showing result 1 - 5 of 118 swedish dissertations containing the words independent protection.
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1. Distance Protection of Transmission Lines with High Levels of Series Compensation : A study on frequency and time domain communication independent distance protection for series compensated lines
Abstract : Series capacitors are used in electric transmission lines to increase their power transfer capacity. They compensate for the inductive reactance of the line. They offer a useful alternative to building new lines, in view of economic and environmental constraints. READ MORE
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2. Differential Protection for Arbitrary Three-Phase Power Transformers
Abstract : This thesis describes how to provide standardized, current based, differential protection for any three-phase power transformer, including phase-shifting transformers with variable phase angle shift and transformers of all construction types and internal on-load tap-changer configurations. The use of standard transformer differential protection for such applications is considered impossible in the protective relaying standards and practices currently applied. READ MORE
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3. Multi-terminal HVDC protections based on transient line modeling
Abstract : High voltage direct current (HVDC) is considered one of the critical technologies required for the power system to enable the transition toward renewables. With an increasing geographical density of HVDC converters, there is a potential for optimization by connecting more than two converters into a shared DC transmission system, thus forming a multi-terminal HVDC (MTDC) system. READ MORE
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4. Migration and social protection in European welfare states: Cui bono?
Abstract : Whether and under what conditions foreigners should be granted access to welfare benefits has been debated for as long as public welfare systems have existed. In contrast, research on the actual social protection of immigrants is still comparatively scarce in the welfare state literature. READ MORE
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5. Proliferative and protective effects of the GH/IGF-I axis on cardiomyocytes and neural progenitor cells
Abstract : Cardiovascular disease is the most common cause of mortality in the Western world and the majority of cardiovascular deaths are caused by coronary artery disease or cerebrovascular disease. Growth hormone (GH) is a growth-promoting hormone synthesized by the pituitary. READ MORE