Sökning: "stamnätet"

Visar resultat 1 - 5 av 31 uppsatser innehållade ordet 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

   M1-uppsats, KTH/Hälsoinformatik och logistik

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

   Sammanfattning : 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. LÄS MER

3. 2. Krav för inmatning av el till nätet från batterier : Undersökning av villabatterier och elbilar via V2G

   M1-uppsats, Högskolan Dalarna/Institutionen för information och teknik

   Författare :Magnus Kallin; [2023]
   Nyckelord :requirements; energy storage; battery storage; islanding; V2X; V2L; V2H; V2G; electric vehicles; EV; krav; inmatning; energilager; batterilager; ödrift; V2X; V2L; V2H; V2G; elbilar; EV;

   Sammanfattning : Dagens samhälle har stort beroende av central elförsörjning för att ha kapacitet att fungera. Beroendet av centrala produktionsenheter kopplade till stamnätet kan i sin tur göra det svenska elnätet mer sårbart och ostabilt. LÄS MER

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

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Linus Eriksson; [2022]
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

5. 4. Investigating maintenance costs using response feature analysis

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för matematik och matematisk statistik

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

   Sammanfattning : 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. LÄS MER

7. 5. 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)

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Hanna Borgefeldt; Emma Svensson; [2022]
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER