Sökning: "current distribution"

Visar resultat 11 - 15 av 795 avhandlingar innehållade orden current distribution.

1. 11. Planning Models for Single Wire Earth Return Power Distribution Networks

   Författare :Geofrey Bakkabulindi; Lennart Söder; Mikael Amelin; Peiyuan Chen; KTH; []
   Nyckelord :Rural electrification; power distribution planning; Single Wire Earth Return; distribution power flow; power system modeling; SRA - Energy; SRA - Energi;

   Sammanfattning : 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. LÄS MER

3. 12. Fuel Cells and Biogas

   Författare :Lars Hedström; Per Alvfors; Peter Lund; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; air bleed; biogas; carbon dioxide; carbon monoxide; current distribution; dilution; efficiency; energy conversion; energy systems; experimental; fuel cell; fuel cell systems; PEFC; poisoning; reformate; SOFC; Chemical energy engineering; Kemisk energiteknik;

   Sammanfattning : This thesis concerns biogas-operated fuel cells. Fuel cell technology may contribute to more efficient energy use, reduce emissions and also perhaps revolutionize current energy systems. The technology is, however, still immature and has not yet been implemented as dominant in any application or niche market. LÄS MER

4. 13. Opportunistic Networking : Mobility Modeling and Content Distribution

   Författare :Ljubica Pajevic; Gunnar Karlsson; Karin Anna Hummel; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; opportunistic networks; ad hoc networks; mobility modeling;

   Sammanfattning : We have witnessed two main trends in recent years that have shaped the current state of communication networks. First, the Internet was designed with the initial idea to provide remote access to resources in the network; today it is overwhelmingly being used for content distribution. LÄS MER

5. 14. Arvsrätt eller rätt till arv : en studie om arvsberättigande och kvarlåtenskapens fördelning

   Författare :Karin Kulin Olsson; Annina H. Persson; Eleonor Kristoffersson; Jane Stoll; Örebro universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; inheritance; direct heirs; successor; will; surviving spouse; testament; distribution; estate;

   Sammanfattning : The present Swedish law of inheritance has developed slowly and is based on ideas stemming from an earlier social structure than that of today. When reforms have been made, modern regulations have been added to a very old structure. LÄS MER

7. 15. Condition measuring and lifetime modelling of disconnectors, circuit breakers and other electrical power transmission equipment

   Författare :Per Westerlund; Patrik Hilber; Tommie Lindquist; William Q Meeker; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; reliability; maintenance; condition monitoring; disconnector; circuit breaker; Weibull distribution; prediction; risk analysis; decision making; beta distribution; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The supply of electricity is important in modern society, so the outages of the electric grid should be few and short, especially for the transmission grid. A summary of the history of the Swedish electrical system is presented. The objective is to be able to plan the maintenance better by following the condition of the equipment. LÄS MER