Sökning: "variable renewable energy"

Visar resultat 31 - 35 av 85 avhandlingar innehållade orden variable renewable energy.

1. 31. Multilevel Power Converters with Smart Control for Wave Energy Conversion

   Författare :Deepak Elamalayil Soman; Mats Leijon; Jan Isberg; Sebastain Nielebock; Gopal Mondal; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multilevel power converter; FPGA control; Wave Energy; Three-level boost converter; Three-level buck-boost converter; Variable-renewable-energy; Three-level neutral point clamped inverter; Linear generator; DC-link; AC2AC direct converter; Modular multilevel converter; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : The main focus of this thesis is on the power electronic converter system challenges associated with the grid integration of variable-renewable-energy (VRE) sources like wave, marine current, tidal, wind, solar etc. Wave energy conversion with grid integration is used as the key reference, considering its high energy potential to support the future clean energy requirements and due the availability of a test facility at Uppsala University. LÄS MER

3. 32. SECURITY OF SUPPLY DURING THE ENERGY TRANSITION:THE ROLE OF CAPACITY MECHANISMS

   Författare :Pradyumna Bhagwat; Mehrdad Ghandhari Alavijh; Margot P. C. Weijnen; Laurens J. De Vries; Reinier van der Veen; KTH; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Adequacy policy; capacity mechanisms; capacity market; investment; energy; agent-based modelling; EMLab-Generation; strategic reserve; security of supply; cross-border effects.; Economics; Nationalekonomi; Energy Technology; Energiteknik;

   Sammanfattning : The push for clean energy has caused a rapid growth of renewables in the electricity supply mix of the EU. Although one would assume that the impact of these technologies is entirely positive, recent research and experience indicate that there is reason for concern namely regarding the security of supply. LÄS MER

4. 33. An experimental approach to energy storage based synthetic inertia and fast frequency regulation for grid balancing

   Författare :Martin Fregelius; Urban Lundin; Roy Nilsen; Uppsala universitet; []
   Nyckelord :Renewable energy; Synthetic inertia; Enhanced inertia; Energy storage system; Hybrid energy storage system; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : The increasing interest in renewable energy has significantly increased in the last decades. The increasing amount of variable renewable energy resources in the grid, which are connected via power electronics, reduces the total mechanical system inertia. LÄS MER

5. 34. Analysing the transient operation of the boiler and the TES tank for improving the flexibility in biomass CHP

   Författare :Milan Zlatkovikj; Hailong Li; Lei Feng; Mälardalens universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flexibility; combined heat and power CHP ; boiler; thermal energy storage TES ; feed-forward model predictive control FF MPC ; Energy- and Environmental Engineering; energi- och miljöteknik;

   Sammanfattning : The uncertainty in the energy systems due to the continuously growing share of variable renewable energy sources (VRES) increases the requirements for flexibility. From the multiple mechanisms to improve flexibility, biomass-fired combined heat and power plants (CHPs) have gained attention due to their sustainability and high efficiency. LÄS MER

7. 35. Integrating Heat Pumps into Smart Grids

   Författare :David Fischer; Björn Palm; Georges Laurent; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Technology; Energiteknik;

   Sammanfattning : Transforming our energy system towards 100% renewable energy sources requires radical changes across all energy sectors. Heat pumps as efficient heat generation technology link the electricity and heat sector. From 2010 to 2015 between 750,000 and 800,000 heat pumps have been sold every year across Europe. LÄS MER