Essays about: "effektflöde"

Showing result 1 - 5 of 6 essays containing the word effektflöde.

1. 1. Fault current injection from Inverter Based Generation in the distribution grid : A case study of distribution grid on the Swedish island of Gotland

   University essay from Uppsala universitet/Institutionen för elektroteknik

   Author : Farsad Mansori; [2022]
   Keywords : Distribution generator; Inverter-Based Distributed Generation; Inverter Based Generation; DFIG; PSCAD; Distribution grid; Overcurrent protection;

   Abstract : This work proposes recommendations for new guidelines for fault current injection on a distribution grid. These guidelines will help improve the transition towards renewable electrical energy generation. READ MORE

3. 2. Microgrid Safety and Protection Strategies

   University essay from KTH/Elektroteknisk teori och konstruktion

   Author : Aryudha Hartono; [2018]
   Keywords : IB-RES; grid-connected mode; islanded mode; short circuit; IED; directional zero and negative sequence current protection; unbalanced load flow; protection coordination; fault ride-through;

   Abstract : One of the challenging issues with the Microgrid is that the bidirectional power flow providedby the distributed generator (DG) which modify the fault current level. Furthermore, theinverter based-renewable energy source (IB-RES) limits the total fault current contributionto the grid due to its thermal capability. READ MORE

4. 3. Strategic Battery Storage Integration into the Swedish Power Market

   University essay from KTH/Energiteknik

   Author : Marius Lasse Kopiez; Kristofer Eidner Låås; [2018]
   Keywords : ;

   Abstract : Omställningen mot fler förnyelsebara energikällor inom det svenska elsystemet innebär en större del variabel elproduktion. Detta ställer krav på en hög flexibilitet såsom att flytta energi i tiden där energilagring har en hög nyttjandegrad eftersom att det kan användas både för producent samt förbrukare. READ MORE

5. 4. 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

6. 5. Verification of the program PowerGrid and establishment of reference grid for calculations

   University essay from Uppsala universitet/Elektricitetslära

   Author : Simon Cederholm; [2015]
   Keywords : PowerGrid; power grids; reference grid; calculations; power flow; short-circuit; Newton-Raphson; Ybus; Y-bus; admittance matrix; Velander; Matlab; PowerGrid; elnät; referens; referensnät; beräkningar; elnätsberäkningar; effektflöde; kortslutningsström; kortslutningseffekt; Newton-Raphson; Ybus; Y-bus; admittans-nod matris; Velander; Matlab;

   Abstract : Fortum Distribution AB uses a program called PowerGrid (PG) in its daily work. PG is a combined Network information system and grid calculation program. The development of this program is an ongoing process, so Fortum desired a reference program be set up as a means of controlling the continued accuracy of PG’s calculation results. READ MORE