Essays about: "Transmission line protection"

Showing result 1 - 5 of 8 essays containing the words Transmission line protection.

1. 1. Line Distance Protection in Power Grids with Variable Renewable Energy Sources : An Investigation on Time Domain Distance Protection via Parameter Estimation

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

   Author : Ludvig Ringaby; [2023]
   Keywords : Distance protection; Power system protection; Time domain distance protection; Differential Equation Algorithm; Variable renewable energy; IBR; Distansskydd; Skyddssystem i elkraftsystem; Tidsdomän distansskydd; Differentialekvationsalgoritm; Variabel förnybar energi;

   Abstract : Variable renewable energy sources typically connect to the power grid through power electronic interfaces. Increased use of such sources can cause issues for conventional distance protection. READ MORE

3. 2. Wide-Angle Radome Design for Low-Cost Additive Manufacturing

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Martin Fajerberg; Mattias Nylander; [2022]
   Keywords : Radar; Radome; A-Sandwich; B-Sandwich; Multilayer; Polarization; Angle of Incidence; Finite Element Method; Differential Evolution Optimization; Transmission Line Theory; Honeycomb; Additive Manufacturing; Electromagnetic Theory; Technology and Engineering;

   Abstract : The radome, a portmanteau of the words radar and dome, is a protective dielectric cover to protect a radar from its surrounding environment. The surrounding environment can be rain, wind, sand, dust and whatever else that might harm the radar. READ MORE

4. 3. Transmission line protection performance in presence of power electronic-interfaced devices : Impact and needed countermeasures in the Swedish transmission system

   University essay from Uppsala universitet/Elektricitetslära

   Author : Hanna Olofsson; [2021]
   Keywords : ;

   Abstract : The penetration level of power electronic-interfaced devices (PEID:s) in power systems isincreasing, including wind- and solar power, HVDC and FACTS devices. Fault current injectedby PEID:s is lower in magnitude, may lack or contain a reduced negative sequence componentand can have a wide range of phase angles, as opposed to fault current supplied bysynchronous generators (SG:s). READ MORE

5. 4. Analysis and comparison of reusable and one-way packaging solutions for gear manufacturing. Their impact on the environment, automation and total cost.

   University essay from KTH/Industriell produktion

   Author : Claudia Ferrari; [2019]
   Keywords : ;

   Abstract : Producer´s responsibility has gained relevance when it comes to sustainable development, and its role in closed loop product life cycle and sustainable manufacturing has become of vital importance. Hence, packaging solutions must have a high degree of sustainability, while maintaining high quality and protection of the components. READ MORE

6. 5. The impacts of series compensated EHV lines on distance protection, and a proposed new mitigation solution

   University essay from KTH/Elektroteknisk teori och konstruktion

   Author : Syed Arif Ullah Shah; [2017]
   Keywords : Series compensation; metal oxide varistor; voltage inversion; current inversion; sub-synchronous oscillation; quadrilateral characteristic distance relay; digital high-pass filter; Seriekompensation; metalloxidvaristor; spänningsinversion; ströminversion; subsynkron oscillation; fyrsidig karakteristiskt distansrelä; digitalt högpassfilter;

   Abstract : Series compensation is extensively applied to the transmission lines to increase the power transfer capability of transmission lines, reduce transmission losses, improve voltage profiles, and improve power oscillation damping and transient stability of power systems. But it modifies the apparent impedance of the transmission lines during fault conditions and might cause the distance protection of transmission lines to encounter directional discrimination issues and reach problems. READ MORE