Search Constraints

Start Over
Filtering by: Subject Electric power failures -- Mathematical models Remove constraint Subject: Electric power failures -- Mathematical models

Search Results

  • Dynamic modeling and mitigation of cascading failure in power systems

    Creator:
    Song, Jiajia
    Abstract:
    Recent blackout events consistently show that a variety of mechanisms are involved in cascading outages. These cascading mechanisms are irregularly modeled and validated within the existing literature and industry practices. Understanding the relative significance of these different mechanisms is important for choosing which one(s) needs to be modeled for specific...
    Resource Type:
    Dissertation
    Full Text:
    dynamic model of cascading failure in power systems, which we call “Cascading Outage Simulator with

  • Applications of mathematical programming techniques in optimal power flow problems

    Creator:
    Li, Ruqi
    Abstract:
    In the past two decades, a great amount of attention has been paid to investigating the economic and safe operation of power systems using modern mathematical techniques. The classic economic dispatch problem, now often called the Optimal Power Flow problem, has been formulated as a mathematical optimization problem and has...
    Resource Type:
    Masters Thesis
    Full Text:
    power systems using modern mathematical techniques. The classic economic dispatch problem, now often

  • Model development via delay extraction for the time-domain simulation of lossy transmission lines.

    Creator:
    Blevins, Chris
    Abstract:
    This thesis presents two new approaches for the broadband, time-domain modeling of lossy transmission lines. Each approach is based on an alternative derivation of delay extraction in order to separate the line's linear phase from its attenuation and dispersion. Augmentation networks represent the derived attenuation networks as rational function approximations....
    Resource Type:
    Masters Thesis
    Full Text:
    MODEL DEVELOPMENT VIA DELAY EXTRACTION FOR THE TIME

  • Planning for controllable network devices in power transmission systems

    Creator:
    Kosterev, Dmitry N.
    Abstract:
    The full capacity of the existing transmission lines is often underutilized due to the system stability requirements. Controllable network devices represent the effective means of improving the system stability, and their deployment allows better use of the existing transmission facilities and can help to avoid construction of new lines. This...
    Resource Type:
    Dissertation
    Full Text:
    Concept 5 2.2 Power System Model 6 2.2.1 Transmission System Equations 7 2.2.2 Transmission Network

  • Detection of induction motor stator abnormalities using motor current signature analysis

    Creator:
    Bin Eid, Ghassan A.
    Abstract:
    Induction motors are considered to be the work horse in all types of today's industries. In all mechanical applications, using an induction motor is considered to be the preferable, if not the optimum selection. Their failures, on the other hand, cause an interruption equal to their volume of dependency in...
    Resource Type:
    Masters Thesis
    Full Text:
    Collection and Storage The power monitoring system (PMS Model PML7600) was used as a data logger for

  • Detection of incipient rotor bar faults and air-gap asymmetries in squirrel-cage motors using stator current monitoring

    Creator:
    Al Tuaimi, Hamad A.
    Abstract:
    Preventative motor fault detection is of prime importance for modern plant management. During research into rotor faults, performed at the Motor Systems Resource Facility (MSRF), an optimized rotor fault detection and classification method was proposed. In critical process applications, the suggested method would provide the foundation for continually monitoring a...
    Resource Type:
    Masters Thesis
    Full Text:
    objectives and contributions ..................................................... 6 2. Rotor Failure

  • Nonlinear control applied to power systems

    Creator:
    Vedam, Rajkumar
    Abstract:
    When large disturbances occur in interconnected power systems, there exists the danger that the power system states may leave an associated region of stability, if timely corrective action is not taken. Open-loop remedial control actions such as field-forcing, line-tripping, switching of series-capacitors, energizing braking resistors, etc., are helpful in reducing...
    Resource Type:
    Dissertation
    Full Text:
    device is used to implement the nonlinear controller in this dissertation. A mathematical model of the

  • Improved efficiency in medium-power flyback converters

    Creator:
    Ruttanapaibooncharoen, Surin
    Abstract:
    Switch-mode power supplies (SMPS's) not only convert energy, they also consume it. Typical operational efficiencies are approximately 25 to 60% for linear power supplies, and approximately 50-90% for switching power supplies. This means that products whose end-use electronics are dc, such as televisions and DVD players, could consume 50% less...
    Resource Type:
    Masters Thesis
    Full Text:
    . Title: Improved Efficiency in Medium-Power Flyback Converters. Abstract approved: Annette von Jouanne

  • A novel control design for a wave energy converter

    Creator:
    Schacher, Alphonse A.
    Abstract:
    Ocean wave energy is rapidly becoming a field of great interest in the world of renewable energy. Significant advancements in design and technology are being made to make wave energy a viable alternative for our growing energy demands. The two major hurdles for ocean wave energy to make a significant...
    Resource Type:
    Masters Thesis
    Full Text:
    Voltages………………………….. 59 5.17 WEC Power Take-Off………………………………………………………61 5.18 Model of Power Take-Off

  • Evaluation of the performance of a taut-moored dual-body direct-drive waveenergy converter through numerical modeling and physical testing

    Creator:
    Elwood, David E.
    Abstract:
    With energy prices rising and increasing concern about the influence of fossil fuels on climate change, wave energy systems are on the verge of commercial implementation. These first generation wave energy converters utilize either pneumatics or hydraulics to convert the mechanical energy of waves into electricity. For the last several...
    Resource Type:
    Masters Thesis
    Full Text:
    model of the power take-off system including the ball screw arrangement and the rotary generator