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Description
This thesis presents research on innovative AC transmission design concepts and focused mathematics for electric power transmission design. The focus relates to compact designs, high temperature low sag conductors, and high phase order design. The motivation of the research is to increase transmission capacity with limited right of way.
Regarding compact phase spacing, insight into the possibility of increasing the security rating of transmission lines is the primary focus through increased mutual coupling and decreased positive sequence reactance. Compact design can reduce the required corridor width to as little as 31% of traditional designs, especially with the use of inter-phase spacers. Typically transmission lines are built with conservative clearances, with difficulty obtaining right of way, more compact phase spacing may be needed. With design consideration significant compaction can produce an increase by 5-25% in the transmission line security (steady state stability) rating. In addition, other advantages and disadvantages of compact phase design are analyzed. Also, the next two topics: high temperature low sag conductors and high phase order designs include the use of compact designs.
High temperature low sag (HTLS) conductors are used to increase the thermal capacity of a transmission line up to two times the capacity compared to traditional conductors. HTLS conductors can operate continuously at 150-210oC and in emergency at 180-250oC (depending on the HTLS conductor). ACSR conductors operate continuously at 50-110oC and in emergency conditions at 110-150oC depending on the utility, line, and location. HTLS conductors have decreased sag characteristics of up to 33% compared to traditional ACSR conductors at 100oC and up to 22% at 180oC. In addition to what HTLS has to offer in terms of the thermal rating improvement, the possibility of using HTLS conductors to indirectly reduce tower height and compact the phases to increase the security limit is investigated. In addition, utilizing HTLS conductors to increase span length and decrease the number of transmission towers is investigated. The phase compaction or increased span length is accomplished by utilization of the improved physical sag characteristics of HTLS conductors.
High phase order (HPO) focuses on the ability to increase the power capacity for a given right of way. For example, a six phase line would have a thermal rating of approximately 173%, a security rating of approximately 289%, and the SIL would be approximately 300% of a double circuit three phase line with equal right of way and equal voltage line to line. In addition, this research focuses on algorithm and model development of HPO systems. A study of the impedance of HPO lines is presented. The line impedance matrices for some high phase order configurations are circulant Toeplitz matrices. Properties of circulant matrices are developed for the generalized sequence impedances of HPO lines. A method to calculate the sequence impedances utilizing unique distance parameter algorithms is presented. A novel method to design the sequence impedances to specifications is presented. Utilizing impedance matrices in circulant form, a generalized form of the sequence components transformation matrix is presented. A generalized voltage unbalance factor in discussed for HPO transmission lines. Algorithms to calculate the number of fault types and number of significant fault types for an n-phase system are presented. A discussion is presented on transposition of HPO transmission lines and a generalized fault analysis of a high phase order circuit is presented along with an HPO analysis program.
The work presented has the objective of increasing the use of rights of way for bulk power transmission through the use of innovative transmission technologies. The purpose of this dissertation is to lay down some of the building blocks and to help make the three technologies discussed practical applications in the future.
Regarding compact phase spacing, insight into the possibility of increasing the security rating of transmission lines is the primary focus through increased mutual coupling and decreased positive sequence reactance. Compact design can reduce the required corridor width to as little as 31% of traditional designs, especially with the use of inter-phase spacers. Typically transmission lines are built with conservative clearances, with difficulty obtaining right of way, more compact phase spacing may be needed. With design consideration significant compaction can produce an increase by 5-25% in the transmission line security (steady state stability) rating. In addition, other advantages and disadvantages of compact phase design are analyzed. Also, the next two topics: high temperature low sag conductors and high phase order designs include the use of compact designs.
High temperature low sag (HTLS) conductors are used to increase the thermal capacity of a transmission line up to two times the capacity compared to traditional conductors. HTLS conductors can operate continuously at 150-210oC and in emergency at 180-250oC (depending on the HTLS conductor). ACSR conductors operate continuously at 50-110oC and in emergency conditions at 110-150oC depending on the utility, line, and location. HTLS conductors have decreased sag characteristics of up to 33% compared to traditional ACSR conductors at 100oC and up to 22% at 180oC. In addition to what HTLS has to offer in terms of the thermal rating improvement, the possibility of using HTLS conductors to indirectly reduce tower height and compact the phases to increase the security limit is investigated. In addition, utilizing HTLS conductors to increase span length and decrease the number of transmission towers is investigated. The phase compaction or increased span length is accomplished by utilization of the improved physical sag characteristics of HTLS conductors.
High phase order (HPO) focuses on the ability to increase the power capacity for a given right of way. For example, a six phase line would have a thermal rating of approximately 173%, a security rating of approximately 289%, and the SIL would be approximately 300% of a double circuit three phase line with equal right of way and equal voltage line to line. In addition, this research focuses on algorithm and model development of HPO systems. A study of the impedance of HPO lines is presented. The line impedance matrices for some high phase order configurations are circulant Toeplitz matrices. Properties of circulant matrices are developed for the generalized sequence impedances of HPO lines. A method to calculate the sequence impedances utilizing unique distance parameter algorithms is presented. A novel method to design the sequence impedances to specifications is presented. Utilizing impedance matrices in circulant form, a generalized form of the sequence components transformation matrix is presented. A generalized voltage unbalance factor in discussed for HPO transmission lines. Algorithms to calculate the number of fault types and number of significant fault types for an n-phase system are presented. A discussion is presented on transposition of HPO transmission lines and a generalized fault analysis of a high phase order circuit is presented along with an HPO analysis program.
The work presented has the objective of increasing the use of rights of way for bulk power transmission through the use of innovative transmission technologies. The purpose of this dissertation is to lay down some of the building blocks and to help make the three technologies discussed practical applications in the future.
ContributorsPierre, Brian J (Author) / Heydt, Gerald (Thesis advisor) / Karady, George G. (Committee member) / Shunk, Dan (Committee member) / Vittal, Vijay (Committee member) / Arizona State University (Publisher)
Created2015
Description
For more than twenty years, clinical researchers have been publishing data regarding incidence and risk of adverse events (AEs) incurred during hospitalizations. Hospitals have standard operating policies and procedures (SOPP) to protect patients from AE. The AE specifics (rates, SOPP failures, timing and risk factors) during heart failure (HF) hospitalizations are unknown. There were 1,722 patients discharged with a primary diagnosis of HF from an academic hospital between January 2005 and December 2007. Three hundred eighty-one patients experienced 566 AEs, classified into four categories: medication (43.9%), infection (18.9%), patient care (26.3%), or procedural (10.9%). Three distinct analyses were performed: 1) patient's perspective of SOPP reliability including cumulative distribution and hazard functions of time to AEs; 2) Cox proportional hazards model to determine independent patient-specific risk factors for AEs; and 3) hospital administration's perspective of SOPP reliability through three years of the study including cumulative distribution and hazard functions of time between AEs and moving range statistical process control (SPC) charts for days between failures of each type. This is the first study, to our knowledge, to consider reliability of SOPP from both the patient's and hospital administration's perspective. AE rates in hospitalized patients are similar to other recently published reports and did not improve during the study period. Operations research methodologies will be necessary to improve reliability of care delivered to hospitalized patients.
ContributorsHuddleston, Jeanne (Author) / Fowler, John (Thesis advisor) / Montgomery, Douglas C. (Thesis advisor) / Gel, Esma (Committee member) / Shunk, Dan (Committee member) / Arizona State University (Publisher)
Created2012
Description
Although there are some key qualities that all good leaders employ, variations in effective leadership approaches are evident across different cultures. This project sought to compare and analyze the differences and similarities in leadership principles between Chinese and American business cultures, with emphasis on the divergence caused by the influences of history, culture and politics.
ContributorsLe Tourneur, Maxine Archondakis (Author) / McKinnon, David (Thesis director) / LePine, Marcie (Committee member) / Department of Supply Chain Management (Contributor) / Department of Management and Entrepreneurship (Contributor) / Barrett, The Honors College (Contributor)
Created2017-12
Description
Through the research of: accredited business articles, wedding sites such as The Knot, personal interviews with brides, research novels, television shows, and movies; this project will depict why and how traditional, American "White Weddings" have become so commercialized by advertisements and businesses as a result of various media channels' reinforcements of cultural ideals and norms about brides and weddings since the 1920s. The purpose of this paper is to identify the largest cultural and commercial forces that contributed to the growth and expansion of the wedding industry.
ContributorsHovendon, Allison Michelle (Author) / Suk, Mina (Thesis director) / Ostrom, Amy (Committee member) / Department of Management and Entrepreneurship (Contributor) / Barrett, The Honors College (Contributor)
Created2017-12
Description
Arizona State University has prided itself on the mission to become a global leader in innovation, sustainability, and inclusion for students of all backgrounds. To provide the most meaningful experiences and promote student growth both personally and professionally, the university offers over 800 students organizations for involvement and leadership on campus. With a heavy reliance on paper and print materials, large-scale engagement events such as Passport to ASU and Panhellenic Formal Recruitment have become wasteful and inefficient, straying from the goals established by university president, Michael M. Crow. The processes involved within these two events are outdated and limit accessibility for many students, minimizing the opportunity to get involved and connect with their peers. Engage is a company founded by an Arizona State University student, hoping to find feasible solutions to meet the needs and improve the overall student engagement experience. By designing two separate mobile applications for Passport to ASU and Panhellenic Formal Recruitment, Engage has eliminated the need for paper and print materials while simplifying the event processes for incoming students and the organizations. These apps will similarly improve accessibility for all students, allowing users to get involved and connect with peers without limitations such as transportation or time. Innovation is a key focus of Arizona State University, and to stay competitive they must find new ways to improve the student experience and modernize current offerings. Getting involved is often considered one of the defining parts of collegiate life, and the university must work to maximize opportunities and make the transition as effortless and enjoyable as possible. By implementing these two mobile apps, student engagement will reach new heights and realign with the missions Arizona State University was founded upon.
ContributorsFitzgerald, Paige Elizabeth (Author) / Montoya, Detra (Thesis director) / Giles, Bret (Committee member) / Department of Marketing (Contributor) / W.P. Carey School of Business (Contributor) / Department of Management and Entrepreneurship (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
Many companies recognize the need of soft skill improvement and utilize leadership development programs. As the program states, the company uses the curriculum to focus on developing and cultivating leadership skills for their employees. While perfecting the aptitudes, it is vital that these curriculums focus primarily on developing soft skills rather than hard skills. Not stating that hard skills are not significant; just that leaders require to apply soft skills abundantly in their day to day duties. Within this thesis, the discussion is on the gap of soft skills and why the need to improve and narrow the breach is imperative in today's workforce. About 67% of HR managers will hire a candidate with strong soft skills, even if their hard skills are lacking; since HR managers value and recognize the proficiency gap of soft skills in the workforce today. Because of the necessity for soft skills, it is vital for employers to identify how to assess for soft skills. In order to do so, the companies should focus on the competencies that are required for the needed position. For the competencies that are utilized in leadership positions, soft skills are emphasized and assesses for more. Salt River Project is utilized, in the thesis, as a company example on assessing competencies that are desired when hiring for leadership positions, varying from a supervisor level position to a director level position. Due to the findings stated in the thesis, soft skills are weighed heavily and are recognized as required skills for most leadership positions. Therefore, soft skills are paramount in leadership development programs.
ContributorsRodriquez, Alisa (Author) / Macafee, Lisa (Thesis director) / Knott, Eric (Committee member) / Department of Management and Entrepreneurship (Contributor) / School of Historical, Philosophical and Religious Studies (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
The current Enterprise Requirements and Acquisition Model (ERAM), a discrete event simulation of the major tasks and decisions within the DoD acquisition system, identifies several what-if intervention strategies to improve program completion time. However, processes that contribute to the program acquisition completion time were not explicitly identified in the simulation study. This research seeks to determine the acquisition processes that contribute significantly to total simulated program time in the acquisition system for all programs reaching Milestone C. Specifically, this research examines the effect of increased scope management, technology maturity, and decreased variation and mean process times in post-Design Readiness Review contractor activities by performing additional simulation analyses. Potential policies are formulated from the results to further improve program acquisition completion time.
ContributorsWorger, Danielle Marie (Author) / Wu, Teresa (Thesis director) / Shunk, Dan (Committee member) / Wirthlin, J. Robert (Committee member) / Industrial, Systems (Contributor) / Barrett, The Honors College (Contributor)
Created2013-05
Description
Currently, Arizona State University's West Campus offers students a Bachelor's of Science degree in Forensics. This degree program has been at ASU's West campus for over three years now and is at its capacity of 300 students due to limitations on lab space. In order to support the growth and provide students with a valuable experience, the Math and Natural Sciences department seeks to create a "fee-for-service" enterprise within the Forensics division. This new lab called the Arizona State University Forensic Science Center (ASU-FSC) would serve city, county, state, and federal government agencies. The mission of the ASU-FSC is to provide robust, accurate and efficient forensic services while leading innovation in research and education in forensics for Arizona, the Southwest and the country. The School of Natural Science and Mathematics has sought help from W. P. Carey School of Business students to analyze the possibility of adding a Forensics fee-for-service lab to ASU West campus. The deliverables from this report will provide a comprehensive marketing, supply chain and financial review of all aspects of the business, and will aid in the decision making process for the creation of the Arizona State University Forensic Science Center.
ContributorsBlackburn, Amy (Co-author) / Snyder, Emily (Co-author) / Dong, Tim (Co-author) / Trujillo, Rhett (Thesis director) / Ferry, Lara (Committee member) / W. P. Carey School of Business (Contributor) / Department of Supply Chain Management (Contributor) / Department of Marketing (Contributor) / Department of Management and Entrepreneurship (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
Asana Arizona is a concept created by Arizona State University students Halie Blauser and Stephen Argentati to sell handmade jewelry. They were inspired to start making jewelry in their free time, and were interested to see if they could create a profitable small business. Their first priority was to create a strategic marketing plan, to examine the current external/internal environment and find marketplace opportunities. As a part of this they performed research to determine which fashion styles would be the best target demographic to market their products to, and found that consumers who identified as "Bohemian", "Hipster", and "Punk" were the best target demographics. They also found that a majority of college students do not care whether or not a product is handmade or locally made, and primarily just care about price. Online social media pages were created for Asana Arizona on Instagram, Etsy, and Facebook, and a Facebook ads were created and boosted towards the target fashion styles.
ContributorsArgentati, Stephen (Co-author) / Blauser, Halie (Co-author) / Eaton, Kathryn (Thesis director) / Schlacter, John (Committee member) / Department of Management and Entrepreneurship (Contributor) / Department of Marketing (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Becoming good at selling is a nuanced skill. Many pivotal techniques are often not communicated properly in the training and onboarding phases, leaving many members of the sales force "crippled" before they even get into the field. We set out to discern the "best practices" of selling, and the underlying causes as to why they work. Through meticulous research obtained via study of experiments, sourced articles and other academic papers we compiled a thorough outline detailing the most efficient ways to build a relationship with the buyer and close the sale. From there we discussed the methodology to implement those skills into a complete sales training program. This paper serves as an informational guide to the necessary skills to complete a sale and how to train for those skills.
ContributorsSweeney, Connor (Co-author) / Reid, Tyler (Co-author) / Dietrich, John (Thesis director) / Ostrom, Lonnie (Committee member) / Economics Program in CLAS (Contributor) / Department of Management and Entrepreneurship (Contributor) / Department of Marketing (Contributor) / W. P. Carey School of Business (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05