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{
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"datestamp": "2024-06-27 23:14:41",
"lastmod": "2024-06-27 23:14:41",
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"creators": {
"items": [
{
"name": {
"family": "Carmi",
"given": "Meital O."
}
},
{
"name": {
"family": "Cooley",
"given": "Sage"
}
},
{
"name": {
"family": "Pellegrino",
"given": "Sergio"
}
}
]
},
"title": "Effects of Varying Geometric Design Parameters on the Stability of Deployable Thin-Shell Composite Space Structures",
"ispublished": "unpub",
"full_text_status": "public",
"note": "© 2024 by Meital O. Carmi, Sage Cooley, and Sergio Pellegrino. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.
\n\nThis research was carried out with financial support from the National Science Foundation’s Graduate Research Fellowship Program, the Caltech Space Solar Power Project, and the Caltech Resnick Sustainability Institute in support of the Caltech WAVE Fellows program.
",
"abstract": "\n
\n
Increasing the stability of thin-shell composite structures is important as they become larger and lighter for future applications. This work focuses on varying the cross sectional geometry of thin-shell coilable longerons in an effort to increase both their critical buckling load and stability approaching the buckling load. Stability metrics to quantify the stability of structures with different geometries are defined. 3D-printed and composite longerons with different cross sectional geometries are tested experimentally, and geometrically perfect composite longerons are analyzed numerically. Based on the dominant imperfection that has been observed, the effects of twist on the stability of these structures is investigated.
\n
\n
© 2023 IEEE.
\n\nThe work of B. Fang and C. Zhao was supported by Hong Kong Research Grants Council through grant GRF 14212822. The work of S. H. Low was supported by US NSF through grants ECCS 1931662, ECCS 1932611, and Caltech’s Resnick Sustainability Institute and S2I grants.
",
"abstract": "\n
\n
\n
Solving power flow is perhaps the most fundamental calculation related to the steady state behavior of alternating-current (AC) power systems. The normally radial (tree) topology of a distribution network induces a spatially recursive structure in power flow equations, which enables a class of efficient solution methods called backward/forward sweep (BFS). In this paper, we revisit BFS from a new perspective, focusing on its convergence. Specifically, we describe a general formulation of BFS, interpret it as a special Gauss-Seidel algorithm, and then illustrate it in a single-phase power flow model. We prove a sufficient condition under which the BFS is a contraction mapping on a closed set of safe voltages and thus converges geometrically to a unique power flow solution. We verify the convergence condition, as well as the accuracy and computational efficiency of BFS, through numerical experiments in IEEE test systems.
\n
\n
\n
We thank the US NSF for its support through grants ECCS 1931662, ECCS 1932611, and Caltech’s Resnick Sustainability Institute and S2I grants.
\n\n© 2023 IEEE.
",
"abstract": "\n
\n
\n
In this tutorial we present a simple approach to modeling unbalanced three-phase power flows. We allow general non-ideal models of voltage sources, ZIP loads as well as distribution lines and transformers. The basic idea is to explicitly separate a device/transformer model into an internal model, that depends on the characteristics of the single-phase devices or transformers, and a conversion rule, that depends on their configuration. This approach provides two benefits. First it facilitates the modeling of secondary distribution circuits where only the end devices are directly controllable, not the currents or powers at the secondary transformers. Second it allows us to exploit common structures across different device/transformer variants and derive their external models that are general and unified. We illustrate these benefits by extending a three-phase backward forward sweep method in the literature to allow secondary circuits and formulating a three-phase optimal power flow problem as a quadratically constrained quadratic program.
\n
\n
\n
© 2023 IEEE.
\n\nThe authors thank Subhonmesh Bose (UIUC), Nathan Dahlin (UIUC), and Feng Zhao (ISO NE) for insightful conversations. The authors acknowledge support from NSF Graduate Research Fellowship (DGE-1745301), NSF grants CNS-2146814, CPS-2136197, CNS-2106403, NGSDI-2105648, ECCS 1931662, ECCS 1932611, and Caltech Resnick Sustainability Institute and S2I grants.
",
"abstract": "\n
\n
\n
This work proposes a pricing mechanism for multi-stage electricity markets that does not explicitly depend on the choice of dispatch procedure or optimization method. Our approach is applicable to a wide range of methodologies for the economic dispatch of power systems under uncertainty, including multi-interval dispatch, multi-settlement markets, scenario-based dispatch, and chance-constrained dispatch policies. We prove that our pricing scheme provides both ex-ante and expost dispatch-following incentives by simultaneously supporting per-stage and ex-post competitive equilibria. In numerical experiments on a ramp-constrained test system, we demonstrate the benefits of scheduling under uncertainty and show how our price decomposes into components corresponding to energy, intertemporal coupling, and uncertainty.
\n
\n
\n
Published - Duvvuri_McKeon_TSFP-9_2015.pdf
",
"abstract": "A synthetic large-scale motion is excited in a flat plate turbulent boundary layer experiment and its influence on small-scale turbulence is studied. The synthetic scale is seen to alter the average natural phase relationships in a quasi-deterministic manner, and exhibit a phase-organizing influence on the directly coupled small-scales. The results and analysis presented here are of interest from a scientific perspective, and also suggest the possibility of engineering schemes for favorable manipulation of energetic small-scale turbulence through practical large-scale inputs.",
"date": "2015-07",
"date_type": "published",
"publisher": "Caltech Library",
"id_number": "CaltechAUTHORS:20150729-192020239",
"official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150729-192020239",
"rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.",
"funders": {
"items": [
{
"agency": "Air Force Office of Scientific Research (AFOSR)",
"grant_number": "FA 9550-12-1-0469"
},
{
"agency": "Resnick Sustainability Institute Graduate Fellowship"
}
]
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"basename": "Duvvuri_McKeon_TSFP-9_2015.pdf",
"url": "https://authors.library.caltech.edu/records/f8ghp-nrp51/files/Duvvuri_McKeon_TSFP-9_2015.pdf"
},
"pub_year": "2015",
"author_list": "Duvvuri, Subrahmanyam and McKeon, Beverley J."
},
{
"id": "https://authors.library.caltech.edu/records/b26s1-8b849",
"eprint_id": 47154,
"eprint_status": "archive",
"datestamp": "2023-08-20 01:08:05",
"lastmod": "2023-10-26 20:21:31",
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"creators": {
"items": [
{
"id": "Duvvuri-S",
"name": {
"family": "Duvvuri",
"given": "Subrahmanyam"
},
"orcid": "0000-0001-8082-1658"
},
{
"id": "McKeon-B-J",
"name": {
"family": "McKeon",
"given": "Beverley J."
},
"orcid": "0000-0003-4220-1583"
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},
"title": "Phase relationships in presence of a synthetic large-scale in a turbulent boundary layer",
"ispublished": "unpub",
"full_text_status": "public",
"note": "\u00a92014 AIAA. \n\nThe support of AFOSR (grant FA-9550-12-1-0469, program manager D. Smith) and a Resnick Sustainability Institute Graduate Research Fellowship (S.D.) is gratefully acknowledged.\n\nSubmitted - Duvvuri_McKeon_2014_AIAA.pdf
",
"abstract": "A synthetic spanwise-constant spatio-temporal mode is excited in a flat plate turbulent boundary layer through a spatially impulsive patch of dynamic wall-roughness. The streamwise wavelength of the synthetic mode approximately corresponds to the very large-scale motions present in high Reynolds number wall turbulence. Hot wire anemometer measurements made downstream of the roughness forcing reveal the nature of the two dimensional synthetic large-scale and its influence on the small-scale turbulence. A clear phase organizing effect on the small-scales is noticed in presence of the synthetic large-scale. A thorough understanding of these phase relations lays the foundation for a framework that allows for practical manipulation of energetic small-scale turbulence through large-scale inputs by utilizing the inherent non-linear coupling present in the governing Navier-Stokes equations.",
"date": "2014-06",
"date_type": "published",
"id_number": "CaltechAUTHORS:20140713-153917772",
"official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140713-153917772",
"rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.",
"funders": {
"items": [
{
"agency": "Air Force Office of Scientific Research (AFOSR)",
"grant_number": "FA-9550-12-1-0469"
}
]
},
"other_numbering_system": {
"items": [
{
"id": "2014-2883",
"name": "AIAA Paper"
}
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"local_group": {
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"doi": "10.2514/6.2014-2883",
"primary_object": {
"basename": "Duvvuri_McKeon_2014_AIAA.pdf",
"url": "https://authors.library.caltech.edu/records/b26s1-8b849/files/Duvvuri_McKeon_2014_AIAA.pdf"
},
"pub_year": "2014",
"author_list": "Duvvuri, Subrahmanyam and McKeon, Beverley J."
},
{
"id": "https://authors.library.caltech.edu/records/zpf92-4h579",
"eprint_id": 41558,
"eprint_status": "archive",
"datestamp": "2023-08-19 20:35:42",
"lastmod": "2023-10-24 23:50:34",
"type": "conference_item",
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"creators": {
"items": [
{
"id": "Wu-Chenye",
"name": {
"family": "Wu",
"given": "Chenye"
}
},
{
"id": "Bose-Subhonmesh",
"name": {
"family": "Bose",
"given": "Subhonmesh"
},
"orcid": "0000-0002-3445-4479"
},
{
"id": "Wierman-A",
"name": {
"family": "Wierman",
"given": "Adam"
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{
"id": "Mohesenian-Rad-H",
"name": {
"family": "Mohesenian-Rad",
"given": "Hamed"
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}
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},
"title": "A Unifying Approach to Assessing Market Power in Deregulated Electricity Markets",
"ispublished": "unpub",
"full_text_status": "public",
"keywords": "Market power, electricity markets",
"note": "[1]\nJ. Chen, M. Macauley, and A. Marathe, \"Network topology and loca-\ntional market power,\"\nComputational Econ.\n, vol. 34, pp. 21\u201335, 2009.\n[2]\nK. Atkins, J. Chen, V. S. A. Kumar, M. Macauley, and A. Marathe, \"Lo-\ncational market power in network constrained markets,\"\nJ. of Economic\nBehavior & Organization\n, vol. 70, no. 1, pp. 416\u2013430, May 2009.\n[3]\nY. Y. Lee, R. Baldick, and J. Hur, \"Firm-based measurements of market\npower in transmission-constrained electricity markets,\"\nIEEE Trans. on\nPower Systems\n, vol. 26, no. 4, pp. 1962\u20131970, Nov. 2011.\n[4]\nL. Xu and R. Baldick, \"Transmission-constrained residual demand\nderivative in electricity markets,\"\nIEEE Transactions on Power Systems\n,\nvol. 22, no. 4, pp. 1563\u20131573, Nov. 2007.\n[5]\nD. Gan and D. Bourcier, \"Locational market power screening and con-\ngestion management: experience and suggestions,\"\nIEEE Transactions\non Power Systems\n, vol. 17, no. 1, pp. 180\u2013185, 2002.\n[6]\nP. Wang, Y. Xiao, and Y. Ding, \"Nodal market power assessment in\nelectricity markets,\"\nIEEE Trans. on Pow. Sys.\n, vol. 19, no. 3, pp. 1373\u2013\n1379, 2004.\n[7]\nS. Stoft, \"Power system economics: Designing market for power,\" 2002.\n[8]\nA. Mas-Colell, M. Whinston, J. Green\net al.\n,\nMicroeconomic theory\n.\nNew York: Oxford university press, 1995, vol. 1.\n[9]\nP. Twomey, R. Green, K. Neuhoff, and D. Newbery, \"A review of the\nmonitoring of market power the possible roles of tsos in monitoring for\nmarket power issues in congested transmission systems,\" 2006.\n[10]\nP. Burns, M. Huggins, R. Lydon, and\net al.\n,\nGenerators' Strategies in\nthe England and Wales Electricity Market: A Synthesis of Simulation\nModelling and Econometric Analysis\n, ser. Technical paper. University\nof Bath, 2004. [Online]. Available: http://books.google.com/books?id=\n-tj7PAAACAAJ\n[11]\nA. K. David and F. Wen, \"Market power in electricity supply,\"\nIEEE\nTrans. on Energy Conversion\n, vol. 16, no. 4, pp. 352\u2013360, Dec. 2001.\n[12]\nJ. Bushnell and C. Day, \"An international comparison of models\nfor measuring market power in electricity,\" Energy Modeling Forum\nStanford University, 1999.\n[13]\nA. Y. Sheffrin and J. Chen, \"Predicting market power in wholesale\nelectricity markets,\" in\nProc. of the Western Conference of the Advances\nin Regulation and Competition\n, South Lake Tahoe, 2002.\n[14]\nA. Y. Sheffrin, J. Chen, and B. F. Hobbs, \"Watching watts to prevent\nabuse of power,\"\nIEEE Power and Energy Magazine\n, vol. 2.\n[15]\nCalifornia Independent System Operator, \"Market power and com-\npetitiveness,\" In Annual Report on Market Issues and Performance,\nhttp://www.caiso.com/1c5f/1c5fbe6a1a720.html, 1998.\n[16]\nElectric Reliability Council of Texas, \"Ercot protocols,\"\nhttp://www.ercot.com, 2001.\n[17]\nR. Schmalensee and B. W. Golub, \"Estimating effective concentration in\nderegulated wholesale electricity markets,\"\nRAND Journal of Economics\n,\nvol. 15, no. 1, pp. 12\u201326, Mar. 1984.\n[18]\nK. Purchala, L. Meeus, D. Van Dommelen, and R. Belmans, \"Usefulness\nof DC power flow for active power flow analysis,\" in\nProc. of IEEE PES\nGeneral Meeting\n. IEEE, 2005, pp. 2457\u20132462.\n[19]\nK. S. Pandya and S. K. Joshi, \"A survey of optimal power flow methods,\"\nJ. of Theo. and Applied Info. Tech.\n, vol. 4, no. 5, pp. 450\u2013458, 2008.\n[20]\nA. Holder,\nParametirc LP Analysis\n. John Wiley & Sons, 2010.\n[21]\nS. Boyd and L. Vandenberghe,\nConvex Optimization\n. Cambridge\nUniversity Press, 2004.\n[22]\nR. M. Freund, \"Postoptimal analysis of a linear program under simulta-\nneous changes in matrix coefficients,\" in\nMathematical Programming\nEssays in Honor of George B. Dantzig Part I\n, ser. Mathematical\nProgramming Studies. Springer Berlin Heidelberg, 1985, pp. 1\u201313.\n[23]\nR. Monteiro and I. Adler, \"Interior path following primal-dual al-\ngorithms. part i: Linear programming,\"\nMathematical programming\n,\nvol. 44, no. 1, pp. 27\u201341, 1989.\n[24]\n\"IEEE Power Systems Test Case Archive,\"\nhttp://www.ee.washington.edu/research/pstca\n\nAccepted Version - UnifyMarketPower.pdf
",
"abstract": "A competitive deregulated electricity market with\nincreasingly active market players is foreseen to be the future of\nthe electricity industry. In such settings, market power assessment\nis a primary concern. In this paper, we propose a novel functional\napproach for measuring long term market power that unifies a\nvariety of popular market power indices. Specifically, the new\nmeasure, termed\ntransmission constrained network flow\n(TCNF),\nunifies three large classes of market power measures: residual\nsupply based, network flow based, and minimal generation based.\nFurther, TCNF provides valuable information about market\npower not captured by prior indices. We derive its analytic\nproperties and test its efficacy on IEEE test systems.",
"date": "2013-07",
"date_type": "published",
"publisher": "Caltech Library",
"id_number": "CaltechAUTHORS:20130930-122810401",
"official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130930-122810401",
"rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.",
"funders": {
"items": [
{
"agency": "NSF",
"grant_number": "NetSE CNS 0911041"
},
{
"agency": "NSF",
"grant_number": "ECCS 1253516"
},
{
"agency": "ARPA-E",
"grant_number": "DE-AR0000226"
},
{
"agency": "Southern California Edison"
},
{
"agency": "National Science Council of Taiwan"
},
{
"agency": "R.O.C.",
"grant_number": "NSC 101-3113-P-008-001"
},
{
"agency": "Resnick Institute"
},
{
"agency": "Okawa Foundation"
},
{
"agency": "National Basie Research Program of China",
"grant_number": "2011CBA00300"
},
{
"agency": "National Basie Research Program of China",
"grant_number": "2011CBA00301"
}
]
},
"local_group": {
"items": [
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"primary_object": {
"basename": "UnifyMarketPower.pdf",
"url": "https://authors.library.caltech.edu/records/zpf92-4h579/files/UnifyMarketPower.pdf"
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"pub_year": "2013",
"author_list": "Wu, Chenye; Bose, Subhonmesh; et al."
},
{
"id": "https://authors.library.caltech.edu/records/g7nmd-bwj48",
"eprint_id": 41880,
"eprint_status": "archive",
"datestamp": "2023-08-19 09:15:45",
"lastmod": "2023-10-20 21:55:04",
"type": "conference_item",
"metadata_visibility": "show",
"creators": {
"items": [
{
"id": "De-Martini-P",
"name": {
"family": "De Martini",
"given": "Paul"
}
},
{
"id": "Wierman-A",
"name": {
"family": "Wierman",
"given": "Adam"
}
},
{
"id": "Meyn-S",
"name": {
"family": "Meyn",
"given": "S."
}
},
{
"id": "Bitar-E",
"name": {
"family": "Bitar",
"given": "E."
}
}
]
},
"title": "Integrated Distributed Energy Resource Pricing and Control",
"ispublished": "unpub",
"full_text_status": "public",
"note": "Published - P_CIGRE_DER.pdf
",
"abstract": "U.S. policy is to allow owners of distributed resources to effectively and reliably provide their services at scale, and operate harmoniously on an interconnected distribution and transmission grid. Accordingly, regulation, new business models and technology advances over the past decade have led to significant growth rates in distributed energy resources including generation, responsive demand, energy conservation and customer adoption of industrial, commercial and residential energy management systems. The result is that several regions are reaching proposed capacity levels for distributed generation that exceed traditional operating and engineering practices for distribution systems. At the same time, policies advocating wholesale spot prices to customer devices (\"prices to devices\") have not adequately considered distribution system reliability impacts or relationship to distributed generation. As such, it is also not clear that current market models or regulations are entirely adequate or appropriate for the several emerging hybrid regional markets, such as California, with millions of distributed energy resources envision by the year 2020.",
"date": "2012",
"date_type": "published",
"publisher": "Caltech Library",
"id_number": "CaltechAUTHORS:20131010-162852589",
"official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20131010-162852589",
"rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.",
"local_group": {
"items": [
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"id": "Resnick-Sustainability-Institute"
}
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"primary_object": {
"basename": "P_CIGRE_DER.pdf",
"url": "https://authors.library.caltech.edu/records/g7nmd-bwj48/files/P_CIGRE_DER.pdf"
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"pub_year": "2012",
"author_list": "De Martini, Paul; Wierman, Adam; et al."
}
]