Sökning: "wide area protection"

Visar resultat 1 - 5 av 20 avhandlingar innehållade orden wide area protection.

  1. 1. Protection Strategies to Mitigate Major Power Systems Breakdowns

    Författare :Mattias Jonsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; system protection schemes; transient instability; distance protection; power swing detectors; voltage instability; generator coherency; wide area protection; out-of-step protection;

    Sammanfattning : This thesis deals with new methods to improve the performance of power system protection in the case of voltage- and transient instability. These methods are designed primarily to mitigate power system breakdown. Relay algorithms are proposed where conventional distance protection is combined with additional relay criteria. LÄS MER

  3. 2. Methods for Synchrophasor-Based Power SystemInstability Detection and HVDC Control

    Författare :Rujiroj Leelaruji; Luigi Vanfretti; Jean Mahseredjian; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wide-Area Monitoring Protection and Control Systems; Synchrophasor applications; Wide-Area Voltage Instability Detection; Wide-Area EarlyWarning Systems; Automatic Voltage Stabilizer;

    Sammanfattning : The recent availability Phasor Measurement Unit (PMU) functionalities in relay technology has opened up new opportunities for power system protection, allowing this microprocessor-based technology to be used beyond traditional protection purposes. This technology now also considers the computation and communication mechanisms that allow the transmission of synchronized phasor measurements. LÄS MER

  4. 3. Wide area monitoring and control systems - application communication requirements and simulation

    Författare :Moustafa Chenine; KTH; []
    Nyckelord :Wide Area Monitoring and Control systems; Phasor Measurements Units; Power System Communication; SCADA systems;

    Sammanfattning : Today’s electrical transmission & distribution systems, are facing a number of challenges related to changing environmental, technical and business factors. Among these factors are, increased environmental restrictions leading to higher share of production from renewable and uncontrollable sources as well as local environmental concerns regarding construction of new transmission and distribution lines. LÄS MER

  5. 4. Design, analysis and simultion for optical access and wide-area networks

    Författare :Jiajia Chen; Lena Wosinska; Hussein Mouftah; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fiber access networks; passive optical network; dynamic bandwidth allocation; reliability; switched optical networks; switching node; optical circuit switching; optical packet switching; routing and wavelength assignment; security; Telecommunication; Telekommunikation;

    Sammanfattning : Due to the tremendous growth of traffic volume caused by both exponential increase of number of Internet users and continual emergence of new bandwidth demanding applications, high capacity networks are required in order to satisfactorily handle the extremely large amount of traffic. Hence, optical fiber communication is the key technology for the network infrastructure. LÄS MER

  7. 5. Mucosal adjuvants and their mode of action in the female genital tract

    Författare :Madelene Lindqvist; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; immunology; mucosal adjuvants; genital tract; vaccine; HSV-2; mouse; alpha-galactosylceramid; CpG ODN; proteoliposome-derived cochleate; inflammation; bioinformatics;

    Sammanfattning : Sexually transmitted infections (STIs) cause a socioeconomic burden, morbidity and even mortality in a large part of the human population all over the world today. One of the most common genital ulcerative diseases is caused by herpes simplex virus type 2 with over 536 million people infected world-wide. LÄS MER