Sökning: "terminal investment"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden terminal investment.

1. 1. Control and Planning of Multi-Terminal HVDC Transmission Systems

   Författare :Mohammad Nazari; Mehrdad Ghandhari; Bertil Berggren; Damien Ernst; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HVDC; VSC; Multi-terminal; Control; Optimization;

   Sammanfattning : With recent advances in power electronic technology, high-voltage direct current (HVDC) transmission system has become an alternative for transmitting power, especially over long distances. Multi-terminal HVDC (MTDC) systems are proposed as HVDC systems with more than two terminals. LÄS MER

3. 2. Costs and benefits of immune system activation on physiology, behavior and offspring phenotype from an immunoecological perspective

   Författare :Sandra Sköld Chiriac; Evolutionär ekologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; immunoecology; acute-phase response; sickness behaviors; energy expenditure; fever; hypothermia; life history; maternal effects; terminal investment; costs of immune responses; Taeniopygia guttata; Parus major; Cyanistes caeruleus;

   Sammanfattning : Pathogen challenges and host immune defenses can have substantial impact on life history patterns of animals. Biotic and abiotic factors may affect immunity in wild animals, influencing e.g., population dynamics and sexual selection. LÄS MER

4. 3. Age, Longevity and Life-History Trade-Offs in the Collared Flycatcher (Ficedula albicollis)

   Författare :Joanna Sendecka; Lars Gustafsson; Anna Qvarnström; Pat Monaghan; Uppsala universitet; []
   Nyckelord :Ecology; age; collared flycatcher; Ficedula albicollis; long-term study; senescence; longevity; reproductive success; selection; individual quality; breeding experience; reproductive effort optimization; terminal investment; life-history trade-offs; reproductive costs; Ekologi;

   Sammanfattning : Age is often a neglected factor in ecological studies. However, age-related changes in reproduction and survival of organisms may strongly influence population dynamics. LÄS MER

5. 4. On Techno-economic Assessment of a Multi-terminal VSC-HVDC in AC Transmission Systems

   Författare :Feng Wang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transmission Grid.; Loss minimization; AC DC system; Transmission expansion planning; Multi-terminal VSC-HVDC; Cost minimization; Cost-benefit analysis; Electric power system; Optimal power flow;

   Sammanfattning : The Voltage Source Converter based Multi-Terminal high voltage Direct Current transmission system (VSC-MTDC) is currently considered as an attractive technical option for increased transmission capacity and improved controllability and flexibility of an electric power grid, thanks to its unique performance characteristics, and the possibility of using the extruded XLPE cables. In the planning process of embedding a VSC-MTDC system into an ac transmission grid, one must assess the potential values in terms of improved energy efficiency, i. LÄS MER

7. 5. Steady state analysis of HVDC grid with Wind Power Plants

   Författare :Kalid Yunus; Chalmers tekniska högskola; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ARIMA; electricity price; meshed HVDC grid; WPP; transmission tariff; temporal and spatial correlation; electricity market; VSC HVDC; wind speed modelling; secondary supervisory controller; LRMC; SRMC; PV; primary controller; investment cost;

   Sammanfattning : The idea of building a multi-terminal, even a meshed HVDC grid in the North Sea, that can inter-connect surrounding nations, is being discussed widely. Such a system is expected to be realised in steps through the interconnection of wind power plants and electricity markets. LÄS MER