Essays about: "voltage reference"

Showing result 1 - 5 of 88 essays containing the words voltage reference.

1. 1. Substation Digitalization for Medium Voltage Urban Distribution Networks : A Techno-Economic Analysis

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

   Author : Diego Molina Mendizábal; [2023]
   Keywords : Continuity of supply; incentive scheme; SAIDI; techno-economic analysis; Kontinuitet i försörjningen; incitamentsprogram; SAIDI; teknisk-ekonomisk analys;

   Abstract : High and medium-voltage digital substations play an essential role in the energy transition since they are part of the equipment required to deploy smart grids. With the gradual increase of smart grids, energy systems are becoming more flexible with the growing penetration of renewable energies and distributed energy generation. READ MORE

3. 2. Development and Analysis of Small Signal DQ-Frame Model for Low Frequency Stability of Train Converters

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

   Author : Fabian Tidner; [2023]
   Keywords : Low Frequency stability; DQ-frame modeling; Single phase converter; Electric rail way systems; Lågfrekvent stabilitet; DQ-ram modellering; Enfasig likriktare; Elektriska järnvägssystem;

   Abstract : In order to meet the increasing demand for sustainable transportation, trains need to run with tighter schedules, more departures and more trains in depot. Multiple trains in depot has been linked to low frequency instability at many locations around the world. READ MORE

4. 3. 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

5. 4. Pulse Charging of Li-ion Batteries for Enhanced Life Performance

   University essay from KTH/Kemiteknik

   Author : Josefin Strandberg; [2023]
   Keywords : Li-ion battery; Pulse charging; Cyclic aging; Capacity fade; Internal resistance; Battery impedance; Litiumjonbatteri; Pulsad laddning; Cyklisk åldring; Kapacitetsminskning; Inre resistans; Batteriimpedans;

   Abstract : Det överhängande behovet av att minska utsläppen av växthusgaser för att uppfylla Parisavtalet har väckt ett ökat intresse för elektrifiering som en strategi för att mildra klimatförändringarna. Litiumjonbatterier spelar en central roll vid elektrifiering och har framträtt som det primära alternativet för batteridrivna elfordon. READ MORE

6. 5. Review and Design of DC Electrical Field Measurement Systems and Related Developments : For Measurements Around HVDC Cable Terminations

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

   Author : Emil Bergvall; [2023]
   Keywords : DC Field Probe; Measurement Systems; Electric Fields; Cable Termination; Ion Drift; Conductivity; HVDC; Field Mill; Field Simulations; Positioning System; MEMS; Electro-Optics; DC Fält Prob; Mätsystem; Elektriska Fält; Kabelavslut; Jondrift; Ledningsförmåga; HVDC; Fältkvarn; Fält Simulationer; Positioneringsystem; MEMS; Elektro-Optik;

   Abstract : With power generation and consumption placed further away from each other, with for example increased offshore power production, the need for HVDC transmission systems increases. As voltage levels in the HVDC transmission system are raised, the losses can be decreased, enabling efficient power transfer over longer distances. READ MORE