Essays about: "Inrush current"

Showing result 1 - 5 of 7 essays containing the words Inrush current.

1. 1. Simulation of Transformer Inrush Currents and Their Impact on the Grid

   University essay from Lunds universitet/Industriell elektroteknik och automation

   Author : Juan de la Peña Toledo; [2022]
   Keywords : Transformer; Energization; PSS E; PSCAD; Simulation; Magnetizing current; Inrush current; Technology and Engineering;

   Abstract : This MSc Thesis’s main objective is to determine the impact of transformer inrush currents in the grid and develop a tool that helps E.ON Energidistribution AB evaluate transformer sizing. The motivation of E. READ MORE

3. 2. Resonant overvoltages caused by transformer energization and saturation : Two EMT case studies conducted using models of the grid in Stockholm and an off-shore wind farm

   University essay from Uppsala universitet/Elektricitetslära

   Author : Gustav Sundberg; [2021]
   Keywords : Resonant overvoltages; Resonance frequency; Parallel resonance; EMT studies; Transformer saturation; Off-shore wind power; Inrush current; Sympathetic Inrush; Resonanta överspänningar; Resonansfrekvens; Parallellresonans; EMT-studier; Magnetiseringsström; Havsbaserad vindkraft;

   Abstract : This thesis investigates the impact of resonant overvoltages and their origin. Series and parallel resonances are present in any electrical grid. The frequency of which this resonance occurs is called resonance frequency. READ MORE

4. 3. Minimizing Transformer No-Load Losses at Hydropower Plants : A Study of Effects from Transformer Switch-Off During Stand-by Operation

   University essay from Uppsala universitet/Institutionen för elektroteknik

   Author : Elin Luedtke; [2021]
   Keywords : step-up transformer; transformer switch-off; stand-by operation; idle operation; transformer winding; inrush current; fatigue stress; fatigue failure; S-N curve; transformer thermal cycling; thermal time constant; saving potential in hydropower; hydropower plant;

   Abstract : Hydropower is the most important power balancing resource in the Swedish electrical power system, regulating the power supply to match the load. Consequently, several hydropower plants have periods of stand-by operation where the power production is absent but where several devices within a plant are still active. READ MORE

5. 4. Optimal Demagnetization of Transformer After Winding Resistance Measurements

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

   Author : Niclas Grönström; [2020]
   Keywords : ;

   Abstract : In this thesis, transformer demagnetization in connection to winding resistance tests is investigated. In transformer testing, winding resistance measurement (WRM) is an important test used to detect winding or connection faults. It is common practice to measure the resistance by injecting a DC current into the windings of a transformer. READ MORE

6. 5. Resynchronisation of Islanded Power Systems

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

   Author : Emelie Frost; [2020]
   Keywords : ;

   Abstract : The electricity demand and need of renewably produced electricity has increased the interest in locally produced electricity, also called distributed generation. The increase of distributed generation increases the risk of islanding, a state when a part of the grid has been electrically isolated. READ MORE