Essays about: "High Voltage Direct Current"

Showing result 26 - 30 of 50 essays containing the words High Voltage Direct Current.

  1. 26. Evaluation of critical fault scenarios for operation with inherent overload in HVDC stations

    University essay from Uppsala universitet/Elektricitetslära

    Author : Lisa Sander; [2018]
    Keywords : HVDC; Modular multilevel converter; VSC; transient currents; transient voltages; inherent overload; converter bus fault; pole to pole fault;

    Abstract : The HVDC, High Voltage Direct Current, is important when it comes to upgrading the energy system to a renewable, sustainable and efficient system. This master thesis is investigating what is happening during the most decisive fault cases when the HVDC station is operating with inherent overload. READ MORE

  3. 27. Business analysis of Company A's maintenance organisation

    University essay from KTH/Industriell produktion

    Author : Dennis Bremberg; Sina Soltaniah; [2018]
    Keywords : ;

    Abstract : Existing high voltage direct current (HVDC) stations have an estimated life-cycle of 30 to 40 years.During this time, operations will be subjected to varying disturbances, including spare partobsolescence, new cyber-security requirements, unforeseen failures as well as planned and forcedoutages. READ MORE

  4. 28. Power Loss Evaluation of Submarine Cables in 500 MW Offshore Wind Farm

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Lahiru Kushan Jayasinghe; [2017]
    Keywords : Power Loss; Offshore Windfarm; Submarine Cables; HVAC; HVDC LCC; HVDC VSC; MATLAB Simulink;

    Abstract : The main objective of this thesis is to develop a new methodology to evaluate the transmission cable losses of wind-generated electricity. The research included the power loss variations of submarine cables in relation to the line length, cable capacity and the transmission technology in an offshore wind farm having a capacity of 500 MW. READ MORE

  5. 29. Dynamics of an ultra-fast Thomson actuated HVDC breaker

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Miguel Álvarez Sánchez; [2017]
    Keywords : HVDC; Ultra-fast Circuit Breaker; Thomson coil actuator; HVDC; ultra-snabb strömbrytare; Thomson-spole manöverdon;

    Abstract : High Voltage Direct Current (HVDC) is a rapidly growing form of power transmission that offers advantages with respect to conventional AC networks. One of the key elements that will allow the generalization of the HVDC grids is the Circuit Breaker (CB), which has to interrupt high DC currents in extremely short times. READ MORE

  6. 30. Monitoring of crack growth and crack mouth opening displacement in compact tension specimens at high temperatures : Development and implementation of the Direct Current Potential Drop (DCPD) method

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Philip Malmqvist; [2016]
    Keywords : DCPD; Crack Growth; Compact Tension Testing; CMOD;

    Abstract : The mechanical engineering department at the University of Idaho is conducting a project with the purpose of developing a complete system for investigating creep-, creep-fatigue- and fatigue properties of metallic materials at elevated temperatures up to 650 ˚C with Compact Tension (CT) specimens. Considerable efforts have been made to study and understand these phenomena, although numerous problems still exist. READ MORE