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  • Development and Experimental Hardware Validation of Novel Variable Speed Hydropower Control Schemes for Emerging Applications and Water Resource Paradigms

    Creator:
    Starrett, Michael A.
    Abstract:
    Recent opportunities for new hydropower generation in the United States have often been in non-powered dams and run-of-river type flows occurring in low-impact natural areas and unregulated conduits. At the same time, a changing water resource paradigm is challenging some existing generation in drought stricken areas where supply reservoirs behind...
    Resource Type:
    Dissertation
    Full Text:
    machines capable of variable speed operation. Variable speed units have a wider range of operating

  • A high power emulation of a wind farm

    Creator:
    Lalla, Chelsea
    Abstract:
    As more wind farms are connected to the grid, the variable nature of wind energy begins to influence grid stability. Energy storage could help smooth the variable nature of wind energy. Laboratory demonstration and exploration of the interaction between different energy storage devices and wind energy could help improve and...
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.2.1 DQ Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2.2 Plant

  • Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim

    Creator:
    So, Ratanak
    Abstract:
    When the term renewable energy is mentioned in a conversation, wind, solar, and hydro energy typically come to mind. However, there is one major resource that has remained mostly untapped: wave energy. Wind and solar power technologies are well established around the world but they cannot generate electricity all the...
    Resource Type:
    Dissertation
    Full Text:
    (approximately 1 million homes) which is equivalent to a large hydroelectric power plant in the U.S. The details

  • Simplified WECC modeling for frequency response, wind integration, and energy storage

    Creator:
    Bhattacharji, Pranathi
    Abstract:
    The primary objective of a grid is to maintain a balance between generation and load. If these quantities are not in balance with each other, severe damages such as voltage fluctuations, low power quality, power outages or even cascaded blackouts may occur. Hence one of the primary factors that holds...
    Resource Type:
    Masters Thesis
    Full Text:
    this, it is very important that the grid is operated within a safe frequency range, by ensuring

  • Experimentation of Synchronous and Variable Speed Small Scale Hydropower Systems

    Creator:
    Jackson, Elliott C.
    Abstract:
    Hydropower is the one of the oldest renewable energy technologies and is wrongly thought of today as having little room to grow. The opportunity for new hydropower capacity is immense through both technology advancement and run-of-river new stream reach projects. Despite the age of hydropower, a divide in opinion is...
    Resource Type:
    Masters Thesis
    Full Text:
    Synchronous Generators . . . . . . . . . 37 2.5.3 Doubly Fed Induction Generators

  • A methodology to enable wind farm automatic generation control

    Creator:
    Han, Hai-Yue
    Abstract:
    Over the last decade the increase in penetration of wind power and its variable nature has begun to add considerable stress to and threatened the stability of the nation's grid. In order to continue growth wind farms will need to have the ability to participate in the same grid frequency...
    Resource Type:
    Dissertation
    Full Text:
    Figure 36: Simulation results of wind error attenuation with ZBB – detailed ............. 51 Figure 37

  • Impacts of Prediction on Wave Energy Converter Control

    Creator:
    Comard, Colin Q.
    Abstract:
    Ocean waves provide a promising source of renewable energy for the North American electric grid. However, ideal control of wave energy converters (WECs) requires perfect forecasting of future wave conditions, and waves can be unpredictable. This paper presents a comparison of three different prediction methods and analyzes their performance in...
    Resource Type:
    Masters Thesis
    Full Text:
    Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 B Timeseries Plots

  • Application of Nonlinear Model Predictive Controller for Ocean Wave Energy Conversion Systems

    Creator:
    Haider, Ali S.
    Abstract:
    This work addresses the application of Nonlinear Model Predictive Control (NMPC) to a class of ocean wave energy conversion systems in which the cost functional is not in a standard quadratic form, and the WEC model includes the nonlinear effects, such as the hydrodynamic viscous drag. The NMPC implementation is...
    Resource Type:
    Dissertation
    Full Text:
    control approach for wave energy converters' relatively slow plant dynamics because it maximizes energy

  • Novel control of a permanent magnet linear generator for ocean wave energy applications

    Creator:
    VanderMeulen, Aaron H.
    Abstract:
    Wave energy conversion devices are a rapidly growing interest worldwide for the potential to harness a sustainable and renewable energy source. Due to the oscillatory nature of ocean waves, the power generated from a permanent magnet linear generator (PMLG) for ocean wave energy conversion is pulsed. Focusing on direct drive...
    Resource Type:
    Masters Thesis
    Full Text:
    ...............................................................................37 4.1 Three-phase to two-phase projection

  • Calibration, characterization, and linear quadratic Gaussian estimation of sensor feedback signals for a novel ocean wave energy linear test bed

    Creator:
    Haller, Christopher A.
    Abstract:
    Continual growth of the world's energy consumption and the demand for long-term clean renewable energy resources has led to the development of ocean-based wave energy technologies. Emerging technologies are advancing potential solutions to the complex problem of energy generation in the harsh and corrosive ocean environment. To develop these technologies,...
    Resource Type:
    Masters Thesis
    Full Text:
    Calibration Procedure . . . . . . . . . . . . . . . . . . 37 3.3.1 Known Weights