Sökning: "out of step protection"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden out of step protection.

1. 1. Line protection and Power System Collapse

   Författare :Mattias Jonsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; voltage stability; numerical relays; power swings; transient stability; power swing detector; out of step protection; back-up protection; distance protection; distance protection statistics; power oscillations; adaptive relaying;

   Sammanfattning : .... LÄS MER

3. 2. Protection Strategies to Mitigate Major Power Systems Breakdowns

   Författare :Mattias Jonsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; system protection schemes; transient instability; distance protection; power swing detectors; voltage instability; generator coherency; wide area protection; out-of-step protection;

   Sammanfattning : This thesis deals with new methods to improve the performance of power system protection in the case of voltage- and transient instability. These methods are designed primarily to mitigate power system breakdown. Relay algorithms are proposed where conventional distance protection is combined with additional relay criteria. LÄS MER

4. 3. Long-term unemployment scarring and the role of labour market policies : The case of Sweden in the 1990s

   Författare :Madelene Nordlund; Mattias Strandh; Per H Jensen; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; unemployment scarring; active labour market policy; unemployment insurance; active labour market policy programme; human capital; capability approach; business cycle; job-chances; reempolyemt income; heterogeneity; Sociology; Sociologi; sociologi; Sociology;

   Sammanfattning : The experience of unemployment puts individuals at risk of long-term negative scarring and the longer the unemployment spell, the greater the risk of negative scarring. In Sweden, labour market policies aim at reducing such risks in the form of unemployment benefits, active matching and active labour market policy programmes (ALMPs). LÄS MER

5. 4. Managing Migration Flows by processing Personal Data within the adequate Data Protection Instrument : Scoping Exercise between general and law enforcement Data Protection Rules applicable to Third Country Nationals

   Författare :Teresa Quintel; Maria Bergström; Wojciech Wiewiórowski; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; EU data protection; third country nationals; immigration; Directive EU 2016 680; Regulation EU 2018 1725; Europarätt; European Integration Law;

   Sammanfattning : In the aftermath of increased migration flows coming to Europe in 2015, the so-called migration crisis, irregular migration and related crimes such as migrant smuggling and human trafficking became a hotly debated topic on European Union (EU) level. The results of those discussions were the fortification of the EU’s external borders, the strengthening of the mandate of relevant EU Agencies and the establishment of new databases in the Area of Freedom, Security and Justice (AFSJ). LÄS MER

7. 5. Dynamic Characteristics of Floating Breakwaters

   Författare :Aurora Xiaomeng Lei; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; floating breakwaters; couplings joints ; dynamic cables; dynamic response; line tension; wave attenuation; wave reflection;

   Sammanfattning : The dynamic behaviour of interconnected floating breakwaters has been studied theoretically and experimentally. For this type of shore-protection system, problems that must be dealt with include wave loads on the breakwaters caused by the interaction between the bodies and the waves, motions of the moored breakwaters caused by the waves, changed wave fields in front of and behind the breakwaters, and forces on the mooring cables and in interconnections between breakwater units. LÄS MER