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Title: MODELING GENERATOR EXCITERS AND LOAD FOR TRANSIENT STABILITY SIMULATION
Creator: Zhi, Yuan
Date: 2014, 2014-12
Description: The rst part of this research work focuses on modeling and implementation of di erent types of excitation systems for computer simulation of...
Show moreThe rst part of this research work focuses on modeling and implementation of di erent types of excitation systems for computer simulation of power system transient stability. Excitation system modeling is an important part for the comprehensive modeling of generation systems. Generally, the function of an exciter is to provide direct current and voltage to the synchronous generator eld winding, which will help synchronous machine to build up the satisfactory terminal voltages during steady state operation. In addition, the exciter will provide control and protective function for synchronous machine regarding terminal voltage during dynamic situation when a disturbance happens. The second part of this research work focuses on modeling of loads. Load modeling is a very important aspect for studying power system stability. This research work provides a detailed modeling of three types of static load | constant impedance, constant power and constant current load. Also, this work provides a detailed modeling of the induction motor load model for electromechanical transient simulations. These load models will be helpful for studying voltage collapse issues in real power systems.
M.S. in Electrical Engineering, December 2014
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Title: 3D COMPRESSION ALGORITHMS AND SYSTEM-ON-CHIP DESIGN FOR ULTRASONIC IMAGING APPLICATIONS
Creator: Govindan, Pramod
Date: 2015, 2015-05
Description: Ultrasonic systems are widely used in imaging applications for nondestructive evaluation, quality assurance and medical diagnosis. These...
Show moreUltrasonic systems are widely used in imaging applications for nondestructive evaluation, quality assurance and medical diagnosis. These applications require large volumes of data to be processed, stored, and/or transmitted in real-time. Therefore, it is essential to compress the acquired ultrasonic radio frequency (RF) signal without inadvertently degrading desirable signal features. Signal fidelity, computational speed and resource utilization are the major parameters to be considered while designing the architecture for the compression algorithm. In this study, two algorithms for ultrasonic signal compression are analyzed based on: sub-band elimination using discrete wavelet transform; and decimation/interpolation using time-shift property of Fourier transform. Both algorithms offer high signal reconstruction quality with a peak signal-to-noise ratio (PSNR) between 36 dB to 39 dB for minimum 80% compression. The computational loads and signal reconstruction quality are examined in order to determine the best compression method in terms of the choice of DWT kernel, sub-band decomposition architecture and computational efficiency. Furthermore, for compressing a large amount of volumetric information, 3D compression algorithms are designed by utilizing the temporal and spatial correlation properties of the ultrasonic RF signals. The performance analysis indicates that the 3D compression algorithm presented in this study offers an overall 3D compression ratio of 95% with a minimum PSNR of 27 dB. Furthermore, the DWT based ultrasonic 3D data compression algorithm is implemented on a reconfigurable ultrasonic system-on-chip hardware platform targeted for real-time ultrasonic imaging applications. The reconfigurable platform allows analysis of multiple architectures to suit various applications. In this study, hardware andtemporal and spatial correlation properties of the ultrasonic RF signals. The performance analysis indicates that the 3D compression algorithm presented in this study offers an overall 3D compression ratio of 95% with a minimum PSNR of 27 dB. Furthermore, the DWT based ultrasonic 3D data compression algorithm is implemented on a reconfigurable ultrasonic system-on-chip hardware platform targeted for real-time ultrasonic imaging applications. The reconfigurable platform allows analysis of multiple architectures to suit various applications. In this study, hardware and software architectures of the 3D ultrasonic compression algorithm implemented on Xilinx Zynq all programmable system-on-chip platform are discussed, along with the analysis of computational performance. Both implementations provide a high signal compression ratio of about 98% with good quality signal reconstruction. This study demonstrates that, compressing 33 MBytes of experimental ultrasonic 3D data into 0.42 MBytes requires only 84 millisecond for hardware architecture, and one minute for software architecture, making both designs highly suitable for real-time ultrasonic imaging applications. Furthermore, the 3D compression is implemented by using OpenCL, which is adaptable to various platforms such as CPUs, GPUs and FPGAs. Therefore, OpenCL provides similar computational performance as that of hardware architecture, and the same flexibility as that of software implementation. This study demonstrates that the OpenCL implementation of ultrasonic 3D compression algorithm on Nvidia GT 750M graphical processing unit (GPU) completes the operation in less than one second.
Ph.D. in Electrical and Computer Engineering, May 2015
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Title: Selection of prime movers for electric power plants
Creator: Smalley, J. S.
Date: 2009, 1907
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/selectionofprime00smal
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaves 17-28

Title: Selection of motor equipment for the electrification of the C.R.I. & P.RY.
Creator: Collins, F. C., Souther, S. A.
Date: 2009, 1908
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/selectionofmotor00coll
Thesis (B.S.)--Armour Institute of Technology

Title: The permutator
Creator: Zanzig, F. C., Aronian, Z.
Date: 2009, 1909
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/permutator00zanz
Thesis (B.S.)--Armour Institute of Technology

Title: SECURITY POLICY MANAGEMENT, THREAT ALLEVIATION AND TRUSTED PLATFORMS FOR EMBEDDED COMPUTING SYSTEMS
Creator: Anand, Vijay
Date: 2011-08, 2011-07
Description: Security guarantees are a measure of trust that can be placed on computing services in the safeguarding of digital assets. These security...
Show moreSecurity guarantees are a measure of trust that can be placed on computing services in the safeguarding of digital assets. These security goals and guarantees coupled with known and modeled threats to the digital assets shape the security policies for computing services. The creation, management and implementation of security policies in computing services is a challenge in defining the role of policy, the management principle for decision making when posed with threats and overall control over digital assets in a well-defined manner. In this Ph.D. thesis we establish a causal relationship of security policies with threats, provide an industry standard management framework (Six Sigma) for decision making, changes to the constructs of the trusted platform module to create a control framework and, finally show how the security framework can be used in a commercial service. The process of updating and refactoring security policy changes becomes a time consuming and tedious task, especially when threats evolve and computing service constructs change when security policy implementations are implicitly implemented. With the basis of correlation of policies over threats an explicit security policy implementation is proposed such that its adaptability, testability and risk quantification can be achieved when threats evolve. In this study we explore policy threat correlation on a Trusted Platform Module (TPM), a hardware system entrusted with security operations and guarantees. An effective TPM needs to adapt to evolving threats arising from firmware bugs or decay in the complexity of ciphering algorithms. Therefore, an adaptive TPM architecture is proposed to counter evolving threats by integrating an FPGA (Field Programmable Gate xi Arrays) block to alter and patch firmware and change ciphering systems. We present how security guarantees in an IT(Information Technology) infrastructure can be met using a TPM and thereby should be an integral part of computing services along with other security constructs like firewalls, intrusion detection systems, anti-virus, etc.. Adaptive security policy requires a management process wherein the risk management, and cost effectiveness principles can be identified. This is essential to make decisions on the trust criteria of digital assets in an industrial management framework. The security policy creation and management process presented in this thesis is based on Six Sigma model and presents a method to adapt security goals and risk management in an industrial framework. As an effective implementation of the security policy the case of application commerce workflow for developers is presented. Secure application distribution and execution guarantees lie in the transfer of trust between various processes in a computing service, also known as Chain of Trust in an embedded system. This study presents application development workflows facilitating secure commerce of digital assets thereby improving consumer trust.
Ph.D. in Computer Engineering, July 2011
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Title: POWER OPTIMIZATION FROM REGISTER TRANSFER LEVEL TO TRANSISTOR LEVEL IN DEEPLY SCALED CMOS TECHNOLOGY
Creator: Li, Li
Date: 2012-04-25, 2012-05
Description: With the progress of CMOS technology, there is a steady growth in clock frequency and chip capacity. As a result, the power dissipation of...
Show moreWith the progress of CMOS technology, there is a steady growth in clock frequency and chip capacity. As a result, the power dissipation of deeply scaled digital CMOS design has increased tremendously. On the other hand, low power VLSI designs are crucial in many areas, such as mobile phones. Furthermore, according the 2011 International Technology Roadmap for Semiconductors (ITRS), the trend towards high power consumption is far beyond the power requirement. As a result, power optimization techniques are highly appreciated in nowadays VLSI design. There are various low power methodologies from system level to layout level. In our research, we are focusing on low power techniques from register transfer level (RTL) to transistor level. Clock gating (CG) is the most widely used technique to reduce dynamic power at RTL. One of the traditional CG styles is XOR-based CG. It compares the inputs and outputs of flip-flops (FFs), and gated the FFs when they are the same. However, this CG is not effective since it does not take the signal activities into account. In this thesis, an activity-driven optimized bus specific clock gating (OBSC) is proposed. It uses finegrained RTL power models to estimate the dynamic power, and chooses only a subset of FFs to be gated selectively based on their switching activities. During the clock gated period, the gated FFs’ outputs are stable. As a result, the combinational logics which are completely dependent on these stable outputs can be power gated so as to save leakage power. Thus, CG and power gating (PG) can be integrated to reduce dynamic and leakage power simultaneously. The sleep signal of our PG is the CG enable signal which is generated during the CG implementation. It does not require an individual power management block to generate as in the case of traditional PG implementation. Moreover, in order to determine if PG leads to leakage power savings, minimum average idle time concept is proposed. Lastly, as a critical part in the integration of CG and PG, data retention logics (DRLs) are required to hold the values of the power gated logics’ outputs so that the non power gated blocks which depend on those outputs can function correctly during the power gated period. In this thesis, a low power DRL design is presented. All the above mentioned techniques have been applied to ISCAS’89 benchmark circuits, and their correctness has been verified successfully. Moreover, the whole experimental process is accomplished automatically by software program, so it is easy to be integrated into current EDA tools.
Ph.D. in Computer Engineering, May 2012
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Title: OPTIMAL TRANSMISSION SWITCHING AND SECURITY-CONSTRAINED UNIT COMMITMENT CONSIDERING DEMAND-SIDE PARTICIPATION
Creator: Ma, Ruicheng
Date: 2015, 2015-05
Description: Transmission topology is traditionally considered as fixed elements in electrical system. Transmission line states used to be presumably set...
Show moreTransmission topology is traditionally considered as fixed elements in electrical system. Transmission line states used to be presumably set as closed for the whole system, or sometimes open for security check purposes. In the development of a smart grid, however, the optimization of the use of transmission has been proposed as an advanced transmission technology. Optimal transmission switching (OTS) is a straightforward method to enhance grid controllability: to mitigate transmission violation, re-dispatch power generation, and meet changing demand with existing infrastructure. Previous papers have shown that co-optimization of generation and transmission problem will improve the economic performance. This thesis provides the formulation and solution methodology for applying OTS in day-ahead security-constrained unit commitment (SCUC) scheduling. Base case and contingency case are examined to ensure the feasibility of the solution. The OTS applications also consider the demand-side participation such as demand response (DR) and renewable energy. The results are presented based on a modified 6-bus system.
M.S. in Electrical Engineering, May 2015
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Title: GALLIUM NITRIDE NANOSTRUCTURED POWER SEMICONDUCTOR DEVICES
Creator: Sabui, Gourab
Date: 2017, 2017-05
Description: Gallium nitride (GaN) has emerged as a promising material for development of power semiconductor devices owing to its superior material...
Show moreGallium nitride (GaN) has emerged as a promising material for development of power semiconductor devices owing to its superior material characteristics. Fabricated GaN power devices have started to outperform its silicon (Si) counterpart with low conduction and switching losses and holds the key to extremely low-loss and high efficiency power delivery circuits of the future. However, GaN power devices have been plagued with several inherent drawbacks preventing an ubiquitous adoption of GaN as the material of choice for power switches. The most critical trade-o↵ has been the choice of substrate for the growth of GaN epitaxy: a high performance, high-cost native substrate or a low-cost, non-native substrate with reliability issues. In order for GaN to thrive as a superior successor to Si, a low cost, high performance epitaxy with improved reliability is expected moving forward. A novel nanostructured approach to GaN power devices is proposed in this dissertation. The nano-GaN power devices theoretically has the potential to bypass the reliability concerns associated with a non-native substrate but still deliver comparable performance. A comprehensive model is proposed for TCAD modeling of bulk GaN power devices to accurately model the nano-GaN devices. Through extensive modeling and simulations, design guidelines for Schottky barrier diodes and field effect transistors based on the nano-GaN concept is laid out to extract the best performance out of this architecture. Dielectric and semiconductor interaction is also exploited to push these devices to perform beyond the unipolar material limit of GaN. The simulated and fabricated nano-GaN power devices show the potential to deliver equivalent or superior performance to present state of the art GaN devices but with improved reliability, ruggedness and low cost.
Ph.D. in Electrical Engineering, May 2017
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Title: DYNAMIC RECONFIGURATION OF THE DISTRIBUTION NETWORK WITH UNCERTAINTIES CONSIDERING DISTRIBUTED GENERATOR
Creator: Zhang, Hao
Date: 2015, 2015-05
Description: The thesis focuses on the reconfiguration process of the electrical distribution system, which reduces the real power loss in the system...
Show moreThe thesis focuses on the reconfiguration process of the electrical distribution system, which reduces the real power loss in the system through optimizing the topology of the distribution system. The model selected for the reconfiguration process of the distribution system is an MILP (mixed-integer linear programming). In addition, an adjusted MILP model with distributed generator. DG is formulated, in which the DG can follow the requirement of real operation in an active way. The major contribution of this thesis is to add the time-dimension and uncertainties. In addition, compared to other methods, the addition of other features into the MILP model can be done easily since the linking constraints can be added into the whole model in a simple way. Through the linking constraints, the reconfiguration of distribution system can transfer from a static model of one time spot with constant supply and demand data to the dynamic optimization-based model that can deal with the entire time horizon and the uncertainty at specific hour. It makes the model closer to the reality. Finally the numerical result is used to verify the concept proposed in this thesis.
M.S. in Electrical Engineering, May 2015
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Title: MICROGRID OPERATION, CONTROL AND PROTECTION AT lIT
Creator: Che, Liang
Date: 2013, 2013-07
Description: Distributed Energy Resource (DER) which includes distributed generation (DG), distributed storage system, and adjustable loads is a key...
Show moreDistributed Energy Resource (DER) which includes distributed generation (DG), distributed storage system, and adjustable loads is a key component in microgrid operations. Microgrids could be clustered at distribution levels to enhance the economics and the reliability of small DGs such as microturbines and wind generation turbines as well as DGs with power electronic interfaces such as photovoltaic (PV) arrays and fuel cells. Microgrid is a small electric power system integrated with on-site DERs to serve all or some portion of the local load which is connected to the utility grid through the point of common coupling (PCC). Microgrids can operate in both grid-connected mode and island mode. The structure and components of hierarchical control for a microgrid at Illinois Institute of Technology (IIT) are discussed and analyzed. Case studies would address the reliable and economic operation of IIT microgrid. The simulation results of IIT microgrid operation demonstrate that the hierarchical control and the coordination strategy of distributed energy resources (DERs) is an effective way of optimizing the economic operation and the reliability of microgrids. The protection is one of the crucial challenges of microgrid operation. Traditional protection schemes for radial distribution networks will not work successfully in microgrids without much modification. The protection scheme of IIT microgrid is discussed. Based on the fault current contributed by synchronous generators in island mode, the IIT microgrid adopts a localized differential protection scheme with adaptive xiv relay settings which feature a multi-level backup protection strategy. The proposed protection scheme would utilize the looped structure of IIT microgrid for enhancing the reliability of microgrid operation. The simulation results of IIT microgrid protection show the effectiveness of the proposed protection scheme.
M.S. in Electrical Engineering, July 2013
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Title: Nernst glower its development, characteristics and application to illumination practice
Creator: Eustice, Alfred L
Date: 2009, 1910
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/nernstgloweritsd00eust
Thesis (B.S.)--Armour Institute of Technology

Title: Networks with variable resistance
Creator: Charlton, John R., Nelson, Edward L.
Date: 2009, 1914
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/networkswithvari00char
Thesis (B.S.)--Armour Institute of Technology

Title: AN INTEGRATED RESOURCE MANAGEMENT AND SCHEDULING FRAMEWORK FOR PRODUCTION SUPERCOMPUTERS
Creator: Tang, Wei
Date: 2012-07-16, 2012-07
Description: Resource management and job scheduling is a crucial task on large-scale computing systems. Despite years of research on resource management...
Show moreResource management and job scheduling is a crucial task on large-scale computing systems. Despite years of research on resource management and scheduling, it has not kept pace with modern changes and technology trends. The study of this thesis is motivated by emerging issues observed in current production supercomputers, caused by reasons such as human behaviors, application characteristics, and increasing system complexity. Specifically, users tend to provide inaccurate parameters for their jobs which are dependent by the scheduler; system owners have diverse goals which are always conflicting with each other. Also, workload characteristics on production supercomputers keep changing unpredictably, making it hard to achieve a sustainable scheduling performance since scheduling policies are largely dependent on workload characteristics. Further, increasing hardware complexity causes system issues and leads to new demands. For example, issues such as node fragmentation, failure interruption, power consumption, and I/O overhead have become common in large-scale systems. Existing resource management systems lack the support for these issues and demands. In this study, we present an integrated resource management and scheduling framework, aiming at addressing emerging issues and challenges in resource management for large-scale production supercomputers. We have designed a set of new schemes, including job parameter prediction, adaptive metric-aware job scheduling, cost-aware job scheduling, and multi-domain job coscheduling. We have implemented these approaches in the production resource manager Cobalt, and evaluated them with real job traces from production supercomputers such as the Blue Gene/P system at Argonne National Laboratory. Experimental results show our schemes can effectively improve job scheduling regarding both user satisfaction and system utilization.
Ph.D. in Computer Science, July 2012
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Title: A NOVEL HYDRO-GENERATOR BASED ENERGY STORAGE CONCEPT FOR MICROGRID APPLICATIONS
Creator: Gu, Ran
Date: 2012-04-26, 2012-05
Description: The solution to deal with the current non-renewable energy crisis, global warming, pollution and green gas emission is to reduce fossil fuels...
Show moreThe solution to deal with the current non-renewable energy crisis, global warming, pollution and green gas emission is to reduce fossil fuels usage and increase use of renewable sources of energy with minimal environmental impact. Solar energy and wind energy have gained significant popularity as natural resources across the world. However, these renewable energies bring new challenges to the control of power systems and distributed generation since they depend on natural elements that can be unpredictable and intermittent. One way to address the intermittency of these resources is to transfer energy in to an energy storage device. Historically, a battery has been viewed as one of the primary energy storage devices. Even though some battery can have high efficiency, they can be limited by the size and volume required to store a large amount of energy. In addition, they can also cause environmental pollution owing to the chemicals used and tend to have a high cost and short life. A novel hybrid energy storage system, which comprises of an integrated hydroelectric-compressed air solution have been proposed in this thesis. Three potential configurations have been outlined, where energy is provided by wind and solar energy. To extract maximum power from wind, solar and water, maximum power point tracking (MPPT) techniques for both renewable sources have been proposed. For researching the interaction between charging and discharging elements, extensive simulations have been conducted using Matlab/ Simulink.
M.S. in Electrical Engineering, May 2012
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Title: RAPID ESTIMATION OF INDUCTION MACHINE STATOR CORE LOSSES
Creator: Narayana Pillai, Sreekanth
Date: 2015, 2015-05
Description: This thesis presents a technique for the rapid estimation of induction machine stator core losses using a series of magneto-static finite...
Show moreThis thesis presents a technique for the rapid estimation of induction machine stator core losses using a series of magneto-static finite element analyzes. The methodology is based on partially uniting two previously developed techniques. The first technique allows for the rapid estimation of steady state three phase induction machine properties under field oriented conditions using an iterative magneto-static finite element analysis approach where sinusoidally distributed currents are imposed on the rotor. The second technique utilized was originally developed to characterize the steady state time domain behavior of a three phase synchronous machine using a series of magneto-static finite element simulations with the rotor through one phase belt. In the induction machine analysis application, the rotor is rotated through one phase belt with sinusoidally distributed rotor currents imposed and adjusted to maintain field oriented condition at each rotor position. Stator flux densities are sampled at each rotor position. Exploiting the magnet symmetries, the radial and tangential flux density waveforms in the stator tooth tip, stator tooth, stator tooth yoke and stator yoke regions are reconstructed for one electrical cycle using a minimum number of rotor positions per simulation steps. From the reconstructed stator flux density waveforms, the stator core losses can be estimated using a number of loss models. In this thesis what is known as the CAL2 method is utilized to estimate the loss in each stator region. The rapid estimation of induction machine stator core losses was implemented in MATLAB to script the behavior of FEMM, an open source finite element analysis program. To enable the technique to be used for a wide range of induction machine geometries and make possible future population based design optimization, a flexible parametric geometry was created. To verify the accuracy of the proposed rapid estimation technique, a comparison was carried out on a 2 HP, 3-phase, 4 pole, 60 Hz induction machine with 36 stator slots and 28 rotor slots, between the proposed technique and a transient element analysis carried out in JMAG, a commercial finite element package, for aveerage torque, stator flux densities and total stator core losses.
M.S. in Electrical Engineering, May 2015
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Title: Raton mountain electrification project the atchinson, topeka & santa fe railway co.
Creator: Sherwin, E. B., Bailey, C. C.
Date: 2009, 1910
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/ratonmountainele00bail
Thesis (B.S.)--Armour Institute of Technology

Title: Design of a 1500 K.W. hydroelectric and auxiliary steam power plant
Creator: Macewing, E. D.
Date: 2009, 1910
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designof1500kwhy00mace
Thesis (B.S.)--Armour Institute of Technology

Title: The design of a 15,500 Kw. generating station with a 2,000 Kw. D.C. railway substation
Creator: Grant, Allan Q, Sugarman, Abraham J.
Date: 2009, 1920
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designof15500kwg00gran
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket...
Show morehttp://www.archive.org/details/designof15500kwg00gran
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket Bibliography: leaf 51
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Title: Design of a 13,500 kw steam-turbo-electric power plant
Creator: Wetzel, C. L, Swanson, F. A, Stecher, M. V
Date: 2009, 1914
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designof13500kws00wetz
Thesis (B.S.)--Armour Institute of Technology;Includes folded leaves in back pocket

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