Search for dissertations about: "fault interruption"

Found 5 swedish dissertations containing the words fault interruption.

  1. 1. Three Phase Controlled Fault Interruption Using High Voltage SF6 Circuit Breakers

    Author : Richard Thomas; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; controlled switching; high voltage; hypothesis testing; circuit breakers; fault interruption; least mean squares regression; power system protection;

    Abstract : A method is presented for implementing controlled fault interruption,using high voltage, SF6 circuit breakers on three phase high voltage powernetworks. The main goal of the method is to synchronize the opening or tripcommands to each phase of a circuit breaker with respect to target currentzero times so that each phase will interrupt with a preselected arcingtime. READ MORE

  2. 2. Controlled switching of high voltage SF6 circuit breakers for fault interruption

    Author : Richard Thomas; [2004]

    Abstract : .... READ MORE

  3. 3. Reliability Evaluation of Distribution ArchitecturesConsidering Failure Modes and Correlated Events

    University dissertation from KTH Royal Institute of Technology

    Author : Sajeesh Babu; KTH.; [2015]

    Abstract : Power systems are in a phase of automation where intelligent components and sub-systems are employed to monitor, control and manage the grid. Quantifying the complex consequences on system reliability, from the integration of such automated and semi-automated equipment into the existing grid is important for maintenance optimisation and fault mitigation. READ MORE

  4. 4. On the design of hybrid DC-breakers consisting of a mechanical switch and semiconductor devices

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Jesper Magnusson; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DC; circuit breaker; hybrid breaker; DC systems; DC; brytare; hybridbrytare; likström;

    Abstract : The interest of using direct current in networks for both transmission and distribution of power is increasing due to the higher efficiency compared to the alternating current used today. As no natural zero crossings exist in direct current, the interruption of fault currents becomes a challenge. READ MORE

  5. 5. Power Electronics for Mitigation of Voltage Sags and Improved Control of AC Power Systems

    University dissertation from Institutionen för elkraftteknik

    Author : Marcio Magalhães de Oliveira; KTH.; [2000]
    Keywords : power electronics; power quality; voltage sags; voltage-source converters; Custom Power; FACTS; real-time simulations; solid-state devices;

    Abstract : The thesis deals with the application of compensators andswitches based on power electronics in AC transmission anddistribution systems. The objective of the studieddevices/equipment is the power flow and voltage control intransmission systems and the mitigation of voltage sags andmomentary interruptions to critical loads in distributionsystems. READ MORE