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- Genre: Academic theses
- Creators: Vittal, Vijay
- Creators: Ryan, Russell
- Status: Published
Description
This thesis concerns the impact of energy storage on the power system. The rapidly increasing integration of renewable energy source into the grid is driving greater attention towards electrical energy storage systems which can serve many applications like economically meeting peak loads, providing spinning reserve. Economic dispatch is performed with bulk energy storage with wind energy penetration in power systems allocating the generation levels to the units in the mix, so that the system load is served and most economically. The results obtained in previous research to solve for economic dispatch uses a linear cost function for a Direct Current Optimal Power Flow (DCOPF). This thesis uses quadratic cost function for a DCOPF implementing quadratic programming (QP) to minimize the function. A Matlab program was created to simulate different test systems including an equivalent section of the WECC system, namely for Arizo-na, summer peak 2009. A mathematical formulation of a strategy of when to charge or discharge the storage is incorporated in the algorithm. In this thesis various test cases are shown in a small three bus test bed and also for the state of Arizona test bed. The main conclusions drawn from the two test beds is that the use of energy storage minimizes the generation dispatch cost of the system and benefits the power sys-tem by serving the peak partially from stored energy. It is also found that use of energy storage systems may alleviate the loading on transmission lines which can defer the upgrade and expansion of the transmission system.
ContributorsGupta, Samir (Author) / Heydt, Gerald T (Thesis advisor) / Vittal, Vijay (Committee member) / Ayyanar, Raja (Committee member) / Arizona State University (Publisher)
Created2012
Description
The purpose of this research paper is to discuss John Carter's Cantata, the musical development of this composition, and provide a brief history of this African American musician and composer. Presently, there exists very little research regarding Carter's life and compositions. From a musician's perspective, this paper discusses the challenges of singing and performing the Cantata for future performers and provides a reference for their preparation. This project also examines John Carter's musical style and analyzes the structure of the Cantata. African-American folk songs were an inspiration to Carter's compositions, especially this particular work. As an African-American, his life and background played a role in his inspiration of composition. With borrowed music, he reveals a basic truth about this period of American history; how the lives of slaves influenced in the development of this particular genre. Additionally, John Carter's style of composition is examined, including the application of jazz and modal scales in his Cantata. Performance practice is examined for both the singer and pianist in a way that best represents the composer's original and unique intent. From vocal safety to breath control, a singer may find several challenges when performing this eclectic piece. This paper provides a guide for singers. A brief overview of the pianist's role in the Cantata is also included. Characteristic words of the African-American vernacular found in Carter's Cantata are briefly discussed and identified (i.e. "them" vs. "dem"). It is essential that any performer, both beginning and advanced, should have a proper understanding of the concepts that Carter had so carefully crafted. This paper endeavors to provide a deeper sense of understanding to what Carter had intended for both the performer and the listener.
ContributorsNa, Bora (Author) / Britton, David (Thesis advisor) / Bush, Jeffrey (Committee member) / Campbell, Andrew (Committee member) / Rogers, Rodney (Committee member) / Ryan, Russell (Committee member) / Arizona State University (Publisher)
Created2012
Description
This paper investigates the origins of the piano recital as invented by Franz Liszt, presents varying strategies for program design, and compares Liszt's application of the format with current trends. In addition it examines the concepts of program music, musical ekphrasis, and Gesamtkunstwerk and proposes a new multimedia piano concert format in which music combines with the mediums of literature and the visual arts; Picturing Rachmaninoff, and Picturing Ravel provide two recent examples of this format.
ContributorsCook, Stephen Barry (Author) / Hamilton, Robert (Thesis advisor) / DeMars, James (Committee member) / Ryan, Russell (Committee member) / Pagano, Caio (Committee member) / Cosand, Walter (Committee member) / Arizona State University (Publisher)
Created2012
Description
The high penetration of photovoltaic (PV) both at the utility and at the distribu-tion levels, has raised concerns about the reliability of grid-tied inverters of PV power systems. Inverters are generally considered as the weak link in PV power systems. The lack of a dedicated qualification/reliability standard for PV inverters is a main barrier in realizing higher level of confidence in reliability. Development of a well-accepted design qualification standard specifically for PV inverters will help pave the way for significant improvement in reliability and performance of inverters across the entire industry. The existing standards for PV inverters such as UL 1741 and IEC 62109-1 primarily focus on safety. IEC 62093 discusses inverter qualification but it includes all the balance of sys-tem components and therefore not specific to PV inverters. There are other general stan-dards for distributed generators including the IEEE1547 series of standards which cover major concerns like utility integration but they are not dedicated to PV inverters and are not written from a design qualification point of view. In this thesis, some of the potential requirements for a design qualification standard for PV inverters are addressed. The IEC 62093 is considered as a guideline and the possible inclusions in the framework for a dedicated design qualification standard of PV inverter are discussed. The missing links in existing PV inverter related standards are identified by performing gap analysis. Dif-ferent requirements of small residential inverters compared to large utility-scale systems, and the emerging requirements on grid support features are also considered. Electric stress test is found to be the key missing link and one of the electric stress tests, the surge withstand test is studied in detail. The use of the existing standards for surge withstand test of residential scale PV inverters is investigated and a method to suitably adopt these standards is proposed. The proposed method is studied analytically and verified using simulation. A design criterion for choosing the switch ratings of the inverter that can per-form reliably under the surge environment is derived.
ContributorsAlampoondi Venkataramanan, Sai Balasubramanian (Author) / Ayyanar, Raja (Thesis advisor) / Vittal, Vijay (Committee member) / Heydt, Gerald (Committee member) / Arizona State University (Publisher)
Created2011
Description
This paper presents a theoretical model for evaluating flashover performance of insulators under contaminated conditions. The model introduces several new features when compared with existing models such as, the formation of dry bands, variations in insulator geometry and surface wettability. The electric field distribution obtained from software for 3-Dimensional models along with form factor are used to determine the dimensions of the dry bands and the onset of arcing. The model draws heavily from experimental measurements of flashover voltage and surface resistance under wet conditions of porcelain and composite insulators. The model illustrates the dominant role played by the insulator shape and housing material on the flashover performance.
ContributorsBo, Lin (Author) / Gorur, Ravi (Thesis advisor) / Vittal, Vijay (Committee member) / Farmer, Richard (Committee member) / Arizona State University (Publisher)
Created2012
Description
This thesis is focused on the study of wind energy integration and is divided into two segments. The first part of the thesis deals with developing a reliability evaluation technique for a wind integrated power system. A multiple-partial outage model is utilized to accurately calculate the wind generation availability. A methodology is presented to estimate the outage probability of wind generators while incorporating their reduced power output levels at low wind speeds. Subsequently, power system reliability is assessed by calculating the loss of load probability (LOLP) and the effect of wind integration on the overall system is analyzed. Actual generation and load data of the Texas power system in 2008 are used to construct a test case. To demonstrate the robustness of the method, relia-bility studies have been conducted for a fairly constant as well as for a largely varying wind generation profile. Further, the case of increased wind generation penetration level has been simulated and comments made about the usability of the proposed method to aid in power system planning in scenarios of future expansion of wind energy infrastructure. The second part of this thesis explains the development of a graphic user interface (GUI) to demonstrate the operation of a grid connected doubly fed induction generator (DFIG). The theory of DFIG and its back-to-back power converter is described. The GUI illustrates the power flow, behavior of the electrical circuit and the maximum power point tracking of the machine for a variable wind speed input provided by the user. The tool, although developed on MATLAB software platform, has been constructed to work as a standalone application on Windows operating system based computer and enables even the non-engineering students to access it. Results of both the segments of the thesis are discussed. Remarks are presented about the validity of the reliability technique and GUI interface for variable wind speed conditions. Improvements have been suggested to enable the use of the reliability technique for a more elaborate system. Recommendations have been made about expanding the features of the GUI tool and to use it to promote educational interest about renewable power engineering.
ContributorsSinha, Anubhav (Author) / Heydt, Gerald T (Thesis advisor) / Vittal, Vijay (Thesis advisor) / Ayyanar, Raja (Committee member) / Karady, George G. (Committee member) / Arizona State University (Publisher)
Created2012
Description
Due to economic and environmental reasons, several states in the United States of America have a mandated renewable portfolio standard which requires that a certain percentage of the load served has to be met by renewable resources of energy such as solar, wind and biomass. Renewable resources provide energy at a low variable cost and produce less greenhouse gases as compared to conventional generators. However, some of the complex issues with renewable resource integration are due to their intermittent and non-dispatchable characteristics. Furthermore, most renewable resources are location constrained and are usually located in regions with insufficient transmission facilities. In order to deal with the challenges presented by renewable resources as compared to conventional resources, the transmission network expansion planning procedures need to be modified. New high voltage lines need to be constructed to connect the remote renewable resources to the existing transmission network to serve the load centers. Moreover, the existing transmission facilities may need to be reinforced to accommodate the large scale penetration of renewable resource. This thesis proposes a methodology for transmission expansion planning with large-scale integration of renewable resources, mainly solar and wind generation. An optimization model is used to determine the lines to be constructed or upgraded for several scenarios of varying levels of renewable resource penetration. The various scenarios to be considered are obtained from a production cost model that analyses the effects that renewable resources have on the transmission network over the planning horizon. A realistic test bed was created using the data for solar and wind resource penetration in the state of Arizona. The results of the production cost model and the optimization model were subjected to tests to ensure that the North American Electric Reliability Corporation (NERC) mandated N-1 contingency criterion is satisfied. Furthermore, a cost versus benefit analysis was performed to ensure that the proposed transmission plan is economically beneficial.
ContributorsHariharan, Sruthi (Author) / Vittal, Vijay (Thesis advisor) / Heydt, Gerald (Committee member) / Hedman, Kory (Committee member) / Arizona State University (Publisher)
Created2012
Description
Playing an orchestral reduction is not always the most joyous of times for pianists. As pianists, we have to express a reduced idea of all the instruments and orchestral textures that are in the full score. However, in many cases, there are often omissions, errors or discrepancies in the existing published reductions. These reductions are made by a variety of people: editors, conductors, pianists, but rarely by the composer, and often do not reflect the composer's true intentions. While many reductions are technically playable, including the reduction of the Sibelius Violin Concerto that will form the basis of this paper, the arrangement of the orchestration can be obscured or inaccurate to the point where the violin soloist may not be receiving the best representation of the actual orchestration. A piano reduction should as closely as possible represent the original intention of the composer, both for the sake of the audience and the performers. The pianist should be able to provide the proper support and orchestration of any reduction for the instrumentalist or vocalist so that the same performance style and technique can be used while performing with either a piano reduction or a full orchestra. This research document contains a detailed examination of the various orchestral reductions of the Sibelius Violin Concerto, culminating in a new version by the author. In this discussion, the author will present a basic understanding of how to orchestrate at the piano through an in-depth explanation of piano skill and technique, practice techniques such as listening to a recorded version of the full orchestration while playing the piano, and ways to study and revise an existing piano reduction. The current published reductions of the Sibelius Violin Concerto contain many errors and discrepancies and will be contrasted with the author's own reduction, available for comparison and study in the appendix. This new revised reduction will clearly show the orchestral instruments represented throughout the score, demonstrate new techniques for various orchestral textures, and will yield a playable product that more closely represents the composer's original intentions.
ContributorsLee, Sehee (Author) / Campbell, Andrew (Thesis advisor) / Rogers, Rodney (Committee member) / Ryan, Russell (Committee member) / Britton, David (Committee member) / Landschoot, Thomas (Committee member) / Arizona State University (Publisher)
Created2011
Description
The craft of improvisation at the organ has survived a long period of dormancy and is experiencing a strong resurgence in the twenty-first century. This project seeks to establish a precedence for the value of notated music as a resource in learning improvisation, and then, through music analysis, provide examples of how that process can develop. The result of the ideas presented here is a pathway whereby any disciplined organist can learn to imitate composed music, assimilate the musical ideas, and innovate through the act of spontaneous improvisation.
ContributorsHoward, Devon (Author) / Marshall, Kimberly (Thesis advisor) / Ryan, Russell (Committee member) / Kocour, Michael (Committee member) / Norton, Kay (Committee member) / Rockmaker, Jody (Committee member) / Arizona State University (Publisher)
Created2012
Description
In the deregulated power system, locational marginal prices are used in transmission engineering predominantly as near real-time pricing signals. This work extends this concept to distribution engineering so that a distribution class locational marginal price might be used for real-time pricing and control of advanced control systems in distribution circuits. A formulation for the distribution locational marginal price signal is presented that is based on power flow sensitivities in a distribution system. A Jacobian-based sensitivity analysis has been developed for application in the distribution pricing method. Increasing deployment of distributed energy sources is being seen at the distribution level and this trend is expected to continue. To facilitate an optimal use of the distributed infrastructure, the control of the energy demand on a feeder node in the distribution system has been formulated as a multiobjective optimization problem and a solution algorithm has been developed. In multiobjective problems the Pareto optimality criterion is generally applied, and commonly used solution algorithms are decision-based and heuristic. In contrast, a mathematically-robust technique called normal boundary intersection has been modeled for use in this work, and the control variable is solved via separable programming. The Roy Billinton Test System (RBTS) has predominantly been used to demonstrate the application of the formulation in distribution system control. A parallel processing environment has been used to replicate the distributed nature of controls at many points in the distribution system. Interactions between the real-time prices in a distribution feeder and the nodal prices at the aggregated load bus have been investigated. The application of the formulations in an islanded operating condition has also been demonstrated. The DLMP formulation has been validated using the test bed systems and a practical framework for its application in distribution engineering has been presented. The multiobjective optimization yields excellent results and is found to be robust for finer time resolutions. The work shown in this report is applicable to, and has been researched under the aegis of the Future Renewable Electric Energy Delivery and Management (FREEDM) center, which is a generation III National Science Foundation engineering research center headquartered at North Carolina State University.
ContributorsRanganathan Sathyanarayana, Bharadwaj (Author) / Heydt, Gerald T (Thesis advisor) / Vittal, Vijay (Committee member) / Ayyanar, Raja (Committee member) / Zhang, Junshan (Committee member) / Arizona State University (Publisher)
Created2012