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Showing result 1 - 5 of 298 swedish dissertations matching the above criteria.

2. 1. On Efficient Transmission Balancing Operation : Capturing the Normal State Frequency and Active Power Dynamics

   Author : Martin Nilsson; Lennart Söder; Julia Matevosyan; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Active Power Dynamics; Frequency Control; Normal State; Power System Balancing; Transmission System Operator; Electrical Engineering; Elektro- och systemteknik;

   Abstract : In an electric power system, there will always be an electric balance. Nevertheless, System Operators (SOs) often uses the term imbalance. Here, the term imbalance refers to the difference between trades and real-time measurements. READ MORE

4. 2. On Modeling the Dynamics of Fixed Biofilm Reactors. With focus on nitrifying trickling filters

   Author : Torsten Wik; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; operation; transfer functions; biofilm reactors; adsorption; dormancy; modeling; dynamics; nitrification;

   Abstract : Fixed biofilms, which are matrix-enclosed populations of organisms attached to solid surfaces, are increasingly used in environmental biotechnology processes, such as the treatment of potable water and wastewater. This thesis aims to give some insight into the dynamic modeling of biofilms and fixed biofilm reactors, with a focus on nitrifying trickling filters (NTFs) for the treatment of wastewater. READ MORE

5. 3. Feeding Strategies Based on Probing Control for E. coli and V. cholerae Cultivations

   Author : Lena de Maré; Institutionen för reglerteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; robotics; control engineering; Automatiska system; robotteknik; reglerteknik; Automation; Temperature; Mid-ranging control; Amino acid; Complex media; Fed-batch bioreactors; Probing control; Biotechnology; Bioteknik; Parameter estimation; Feeding strategies;

   Abstract : The recombinant DNA techniques have made it possible to produce many different proteins for a wide range of applications. The vector encoding for the recombinant protein is often inserted in the bacterium E. coli as it is a well studied and a well-known organism. To achieve a high productivity, it is important to reach a high cell density. READ MORE

6. 4. Microgrid Power Control Strategies: Enabling Distributed Energy Resources in Power Systems

   Author : Jéssica Santos Döhler; Cecilia Boström; Janaína Gonçalves de Oliveira; Irina Temiz; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control strategies; energy storage system; islanding operation; microgrid; multifunctional inverter; ancillary services; unsymmetrical fault.;

   Abstract : As the world continues to deal with the effects of climate change, the need for carbon neu-trality becomes increasingly urgent. To achieve this goal, many countries are exploring the potential of distributed energy resources to reduce their dependence on fossil fuels and transition to renewable sources of energy. READ MORE

7. 5. Electricity Market Design Strategies for Hydro-dominated Power Systems : Exploring Optimal Bidding, Planning, and Strategic Operation through Various Market Design Strategies

   Author : Abolfazl Khodadadi; Lennart Söder; Audun Botterud; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nordic Balancing Model; Electricity Market Designs; Stochastic Optimization; Contract-for-Difference Contracts; Nordiska Balanseringsmodellen; Design av Elektricitetsmarknader; Stokastisk Optimering; Kontrakt- för-Skillnad Kontrakt; Electrical Engineering; Elektro- och systemteknik; Nationalekonomi; Economics;

   Abstract : The existing wholesale power markets in Nordic countries play a vital role in ensuring the planned balance between supply and demand. However, these markets do not guarantee real-time operational security of the power system. READ MORE