Field Containment and Robustness in Design of Air-Core Superconducting Machines MSEE student David Loder with adviser K. Haran Two important challenges in the design of air-core superconducting machines include cost reduction and field containment within the device. Traditional solutions to the field-containment problem incorporate passive magnetic shielding, e.g., an eddy current shield, or a ferromagnetic […]
High Frequency Airgap Windings for High Power Density Electrical Machines
High Frequency Airgap Windings for High Power Density Electrical Machines MSEE student Jonathan Martin with adviser K. Haran The highest power density megawatt-class electrical machines till date have been developed on the order of 9.16 kW/kg employing cryogenic high-temperature superconductor windings. To translate the same class of electric machines for aerospace applications using air-cooling, […]
High Speed, High Frequency Air-Core Machine and Drive
High Speed, High Frequency Air-Core Machine and Drive PhD student Digvijay Deswal with adviser K. Haran The need to produce very high power density machines requires the use of maximum current density along with high-frequency currents. Specially tailored Litz machine windings are being developed. Manufacturing trials (arrived through software simulation and theoretical calculations) were done […]
High Pole Count, High Fundamental Frequency Design for High Power Density Electric Machines
High Pole Count, High Fundamental Frequency Design for High Power Density Electric Machines MSEE student Andy Yoon with adviser K. Haran Induction motors (IM) and permanent magnet synchronous motors (PMSM) are major types of electric machines prominent across many industries. PMSM, proven to require low maintenance with a long lifespan, with higher power density and […]
Mechanical Design of High-speed, High Frequency Air-Core Machine
Mechanical Design of High-speed, High Frequency Air-Core Machine MSEE student Yuanshan Chen with adviser K. Haran A high power density electric machine (8 hp/lb) with integrated high-frequency drives was proposed by Professor Kiruba Haran for the NASA Fixed Wing Project. It is an unconventional inside-out permanent magnet motor with an advanced composite rotor structure. The […]
Optimal PMU Placement for Quickest Line Outage Detection and Identification
PhD student Xichen Jiang with advisor A. Domínguez-García Rapid detection and identification of power system transmission line outages is crucial for maintaining reliability in the power grid. Although many methods exists for line outage detection, most are model based and are thus susceptible to modeling errors. We propose a measurement based statistical method to detect […]
Quantifying the Impacts on Reliability of Coupling between Power System Cyber and Physical Components
PhD student Jiangmeng Zhang with advisor A. Domínguez-García The operation of most modern electrical energy systems is dependent on a cyber infrastructure encompassing sensing, communication, and control devices (cyber components); however, conventional analysis methods are focused on how faults impact the physical infrastructure and are not well equipped to describe the way faults impact the […]
Event-Triggered Distributed Generation Control Architecture for Islanded AC Microgrids
PhD student Justin Hughes with advisor A. Domínguez-García With deeper penetration of variable generation resources, frequency regulation is becoming increasingly important. Flexible loads have been proposed as a low-cost provider of frequency regulation. For example, the flexibility of loads with inherent thermal energy storage resides in their ability to vary their electricity consumption without compromising […]
SC Converter to Balance a Stack of Four ARM Embedded Computers
PhD student Kai Van Horn with advisors P. Sauer and A. Domínguez-García The real-time security-constrained economic dispatch (SCED) is a widely used market-scheduling tool that seeks to economically balance electricity system supply and demand and provide locational marginal prices (LMPs) while upholding system reliability standards. The SCED is usually formulated as a convex optimization problem […]
Differential Power Processing for Series-Stacked Processors
MS student Andrew Stillwell with advisors P. Sauer and R. Pilawa-Podgurski As the capabilities of the internet and cloud services grow, so grows the demand for data centers. Data centers are increasingly occupying a larger percentage of the U.S. energy capacity, leading to a need for efficient power delivery to servers. One trend in servers […]