Essays about: "stamnätet"

Showing result 1 - 5 of 9 essays containing the word stamnätet.

1. 1. Relay settings for frequency derivative protection against islanding : Optimizing RoCoF-Hysteresis and Delay for the Swedish power grid: An investigation of relevant values

   University essay from KTH/Hälsoinformatik och logistik

   Author : Ahmad Safari; [2023]
   Keywords : Islanding; unintentional islanding; distributed energy resources; main grid; RoCoF; hysteresis; delay; Ödrift; oavsiktlig ödrift; distribuerade energiresurser; stamnät; RoCoF; hysteres; fördröjning;

   Abstract : This report addresses the parameter settings for a protective relay designed to safeguard a 15 kW wind turbine located in Rimbo, Norrtälje municipality, against unintentional islanding. This type of situation arises when distributed energy resources continue to supply local loads, even if the main grid has been unintentionally disconnected. READ MORE

3. 2. Application of harmonic injection method to analyse Sub-Synchronous Control Interactions (SSCI)

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Linus Eriksson; [2022]
   Keywords : Sub-synchronous control interaction SSCI ; damping of SSCI; DFIG; PSCAD; Power Oscillation Damper POD ; Harmonic Injection; Subsynkrona kontrollinteraktioner SSCI ; dämpning av SSCI; DFIG; PSCAD; Dämptillsats POD ; Harmonisk Injection;

   Abstract : Wind farms are commonly connected to the main grid through compensated lines which increases the power transfer capability of the line. Double Fed Induction Generator (DFIG) wind turbines in connection to compensated lines can experience Sub-Synchronous Control Interaction (SSCI) which can bring system quantities above allowed levels. READ MORE

4. 3. Investigating maintenance costs using response feature analysis

   University essay from Umeå universitet/Institutionen för matematik och matematisk statistik

   Author : Linus Hansson; [2022]
   Keywords : Response feature analysis; longitudinal data; maintenance costs; Response feature analysis; longitudinell data; underhållskostnader;

   Abstract : Svenska Kraftnät (Svk) is responsible for ensuring that Sweden has a safe, sustainable, and cost-effective transmission system for electricity. In an effort to reduce costs, Svk has participated in a study where it has been determined that there are mostly costs for common facilities that stand out cost-wise. READ MORE

5. 4. Smart and Sustainable Off-grid Housing Powered by Vehicle to Anything (V2X) : An exploratory study to understand the innovation readiness and feasibility for off-grid living powered by Vehicle to Anything (V2X)

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Hanna Borgefeldt; Emma Svensson; [2022]
   Keywords : Off-grid; Vehicle to home; V2H; Vehicle to load; V2L; sustainable power generation; renewable energy; technology readiness level; electric vehicle innovation; Off-grid; Vehicle to home; V2H; Vehicle to load; V2L; hållbar kraftproduktion; förnybar energi; tekniksmognadsgrad; innovation; elbilar;

   Abstract : For the EU to reach net-zero by 2050, an increased rate of renewable energy generation is needed. Off-grid tiny houses serve as a sustainable housing option as they are energy conservative, and their primary source of energy is renewable energy. READ MORE

6. 5. Grid Capacity and Upgrade Costs

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Samantha Chen; Pontus Jaldegren; [2018]
   Keywords : Grid capacity; upgrade costs; electrical power engineering; wind power; power flow; power loss; Nätkapacitet; uppgraderingskostnader; elkraftteknik; vindkraft; effektflöde; effektförlust;

   Abstract : The aim of the study is to analyze the possibility of how and where wind farms should be integrated on the electrical grid. The challenges mainly concern grid capacity and transmission losses. Economic factors will be regarded as well. To fulfill the aim, the Skellefteälven river in Sweden is selected as study object. READ MORE