Informs Annual Meeting Phoenix 2018

INFORMS Phoenix – 2018

SD44

3 - Blockchain in Manufactuirng – A Critical Review Soundar Kumara, Pennsylvania State University, PA, USA Blockchain is becoming popular in several domains. In this talk we explore the technical foundations of Blockchain and their applicability in (big-M ) manufacturing. We will discuss provenance, platforms and the relevance of blockchain. With specific example in manufacturing, we will explore the integrated use of blockchain-analytics and AI. We will address the questions on hyperledger and Ethereum platforms. n SD46 North Bldg 228B Electricity Market Modeling Sponsored: Energy, Natural Res & the Environment/Energy Sponsored Session Chair: Steven A. Gabriel, University of Maryland, College Park, MD, 20742-3021, United States Co-Chair: Ben Hobbs, Johns Hopkins University, Baltimore, MD, United States 1 - Pricing Environmental Externalities in Regions with Asymmetrical Policies Robin Broder Hytowitz, Johns Hopkins University, Baltimore, MD, 21201, United States, Benjamin Field Hobbs We examine integration of regional carbon policies into multi-regional real-time electricity markets, as is the case with California’s cap-and-trade system and Energy Imbalance Market. Five methods for dispatch and pricing are compared. Findings suggest that there is a trade-off between emissions and cost, with no one dominant method to identify and manage carbon leakage from the region with a carbon policy. 2 - Market Power under Nodal and Zonal Congestion Management Techniques European electricity day-ahead markets use simplified methods such as uniform or zonal pricing, which only partly address congestion. Re-dispatch is then necessary to achieve a feasible flow. We discuss that simplified methods (e.g. uniform pricing) combined with re-dispatch, in theory can achieve the maximum optimal surplus, however this only occurs under the assumptions of full participation in re-dispatch and no extra costs of readjustment. We show that violations of these assumptions, i.e. limited participation and extra costs of readjustment can make the day-ahead and re-dispatch model of handling congestion inefficient compared to nodal pricing. 3 - Convex Hull Pricing in Power Markets: Recent Developments in Theory, Computational Efficiency and Practice Peter Whitman, Federal Energy Regulatory Commission, 10808 Gainsborough Road, Potomac, MD, 20854-2510, United States All power markets have non-convexities which make efficient, transparent pricing challenging. Given the changing conditions in power markets, there is renewed interest in Convex Hull Pricing (CHP). An approximation of CHP (ELMP) has been implemented for fast-start resources in the Midcontinent Independent System Operator (MISO), and it has been discussed in other markets. This paper reviews the rationale for CHP and summarizes some key theorems. In particular, it discusses the characterization and role of side payments, reviews revenue adequacy, and explains approximations that make solutions computationally feasible. 4 - A Price-based Bidding Strategy for Electric Storage Resources in Electricity Markets Qingyu Xu, Johns Hopkins University, Baltimore, MD, 21218, United States, Nikita Singhal, Erik Ela FERC Order 841 requires the ISOs to remove the barriers that prevent electric storage resources (ESRs) to enter electricity markets. During the process, instead of proposing direct managing the state of charge (SoC) of ESRs, several ISOs provide ESRs with the option to manage their own SoC through their offers. In this work, using price signals, we formulate a MILP to bid offer curves for ESRs 1) to maximize the profits from arbitraging energy and providing ancillary services, meanwhile 2) to maintain the SoC feasibility when dispatched by ISO, who is not aware of ESR’s SoC information. Mette Bjorndal, NHH Norwegian School of Economics, Helleveien 30, Bergen, 5045, Norway, Endre Bj°rndal, Somayeh Rahimi Alangi, Linda Rud

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Stability and Solvability of Power Flow Systems Sponsored: Energy, Natural Res & the Environment/Electricity Sponsored Session Chair: Andy Sun, Georgia Institute of Technology, Atlanta, GA, 30312, United States Co-Chair: Konstantin Turitsyn, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States 1 - Load-flow in Multiphase Distribution Networks: Existence, Uniqueness, Non-singularity, and Linear Models Andrey Bernstein, Senior Scientist, National Renewable Energy Laboratory (NREL), Golden, CO, United States We consider unbalanced multiphase distribution systems with generic topology, and extend the Z-bus iterative load-flow algorithm based on a fixed-point interpretation of the AC load-flow equations. Explicit conditions for existence and uniqueness of load-flow solutions are presented, guaranteeing convergence of the load-flow algorithm to the unique solution. The methodology is applicable to generic systems featuring wye connections, ungrounded delta connections, and a combination thereof. A sufficient condition for the non-singularity of the load- flow Jacobian is proposed. Linear load-flow models are derived, and their approximation accuracy is analyzed. 2 - A Theory of Solvability for Lossless Power Flow Equations John W. Simpson-Porco, Assistant Professor, University of Waterloo, Waterloo, ON, Canada This talk presents a theory of solvability for power flow equations in lossless networks. We formulate a new model of power flow, termed the fixed-point power flow (FPPF), which is parameterized by three graph matrices quantifying the internal coupling strength of the network. The FPPF leads to an explicit approximation of the high-voltage solution. For a subclass of acyclic networks, we derive necessary and sufficient parametric conditions for the existence of a power flow solution which is unique within a specified set, generalizing the classic textbook result for a two-bus system. 3 - Convex Restriction of Power Flow Feasibility Set Dongchan Lee, Massachusetts Institute of Technology, Cambridge, MA, United States, Hung Nguyen, Krishnamurthy Dvijotham, Konstantin Turitsyn Convex restriction of the power flow feasibility set identifies the convex subset of power injections where the solution of power flow is guaranteed to exist and satisfy the operational constraints. In contrast to convex relaxation, convex restriction provides a sufficient condition for feasibility and is particularly useful for problems addressing uncertainty and security analysis. In this talk, we present a general framework of constructing convex restriction of an algebraic set and apply the framework for power flow feasibility problem. The results provide a nearly tight approximation of the actual feasible set for many of the IEEE test cases. Joint Session ORAM/CYBER: Cyber Manufacturing Systems: Emerging Challenges and Opportunities Emerging Topic: OR and Advanced Manufacturing Chair: Mohammed Shafae, University of Arizona, Tucson, AZ, USA. 1 - Challenges and Opportunities in Additive Manufacturing for Industry 4.0 Bianca Maria Colosimo, Politecnico di Milano, Milan, Italy. This contribution discusses opportunities and challenges for quality assessment, monitoring and control of Additive Manufacturing (AM) processes and products. Special attention is devoted to in-situ data gathering and modeling. 2 - Advancing the Security of Cybermanufacturing Systems: Challenges and Opportunities Lee Wells, Western Michigan University, Portage, MI, USA, Mohammed Shafae As technology progresses, cyber-physical systems are becoming susceptible to a wider range of attacks. In manufacturing, these attacks pose a significant threat to ensuring products conform to their original design intent and to maintaining the safety of equipment, employees, and consumers. This talk discusses the importance of research and development of cyber-security tools specifically designed for manufacturing. A critical review of current research efforts will be presented as well as opportunities for the future of this emerging research area. n SD45 North Bldg 228A

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