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Power Tech Conference

作者： Stephane Fliscounakis Fabrice Zaoui Gabriel Simeant Robert Gonzalez Methods and Support Department RTE (French TSO) Versailles France

This paper attempts to show the influence of network topological changes on the resistive losses for a significant period. As the problem for a long period is not tractable in a mixed integer non-linear programming approach, a piece-wise linear formulation is presented in order to find a convenient relation between active losses and real flows for each branch. Subsequently, a mixed integer linear formulation is developed to find an optimal topology that tends to minimize the active losses. Considered topological configurations concern the splits or mergers of electric nodes and the taps of phase shifting transformers. A practical example based on several hundreds of observations (snapshots) of the French national grid is presented. Obtained result confirms the interest of the method.

关键词： Topology mixed integer linear programming

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Reliable and Low-Power Clock Distribution Using Pre- and Post-Silicon Delay Adaptation in High-Level Synthesis

Reliable and Low-Power Clock Distribution Using Pre- and Pos...

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IEEE International Symposium on Circuits and Systems

作者： Keisuke Inoue Mineo Kaneko School of Information Science Japan Advanced Institute of Science and Technology (JAIST) 1-1 Asahidai Nomi-shi Ishikawa 923-1292 Japan

ISBN: (纸本)9781467302180

Moving into the era of nanoscale devices, reliable clock distribution becomes a challenging problem due to the growing impact of process variations. This paper deals with this difficulty, especially on implementing useful clock skew. One possible robust way is by using programmable delay elements (PDEs) since PDEs can be adjusted after fabrication. However, with this benefit, using PDEs takes large power cost. Based on the fact that the required clock skews are quite different, depending on registers, this paper proposes a register binding approach in high-level synthesis to minimize the number of PDEs for power reduction. A mixed integer linear programming is presented to formally draw up the problem. Experiments achieve 49.4% reduction of PDEs, compared to conventional design.

关键词： high level synthesis Timing devices process change clock skew regular design power reduction mixed integer linear programming Registers LOW POWER Moving

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A MILP Approach for Designing Robust Variable-Length Codes Based on Exact Free Distance Computation

A MILP Approach for Designing Robust Variable-Length Codes B...

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Data Compression Conference (DCC)

作者： Hassan Hijazi Amadou Diallo Michel Kieffer Leo Liberti Claudio Weidmann LIX-Laboratoire dInformatique École Polytechnique Palaiseau France L2S-CNRS-SUPELEC University Paris Sud Gif-sur-Yvette France LTCI-CNRS Telecom ParisTech Paris France ETIS-CNRS UMR 8051-ENSEA University of Cergy-Pontoise Cergy-Pontoise France

This paper addresses the design of joint source-channel variable-length codes with maximal free distance for given codeword lengths. While previous design methods are mainly based on bounds on the free distance of the code, the proposed algorithm exploits an exact characterization of the free distance. The code optimization is cast in the framework of mixed-integer linear programming and allows to tackle practical alphabet sizes in reasonable computing time.

关键词： Vectors Robustness Redundancy Error correction codes mixed integer linear programming Hamming distance Joints

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A Shared Incumbent Environment for the Minimum Power Broadcasting Problem in Wireless Networks

A Shared Incumbent Environment for the Minimum Power Broadca...

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2012 International Conference on Information and Computer Networks (ICICN 2012)

作者： N.E.Toklu R.Montemanni G.Di Caro L.M.Gambardella Istituto Dalle Molle di Studi sull’Intelligenza Artificiale （IDSIA） Galleria 2 CH-6928 Manno Switzerland

In this study, we consider the minimum power broadcasting problem in wireless actuator networks. We attack the problem with a method-the shared incumbent environment-that executes two algorithms in parallel: a mathematical programming approach and a simulated annealing approach. According to the shared incumbent environment paradigm, when an incumbent solution is found by one method, the other method is notified and profits from the information received. Experimental results show that the shared incumbent environment lead to results which are better than those of the two algorithms combined in it taken singularly.

关键词： Shared incumbent environment mixed integer linear programming simulated annealing matheuristics minimum power broadcast wireless networks.

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Sustainable and robust Control of Cyclic Pallet Systems

Sustainable and robust Control of Cyclic Pallet Systems

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IEEE International Conference on Automation Science and Engineering

作者： Maziar Mashaei Bengt Lennartson Department of Signals and Systems Chalmers University of Technology FlexLink AB

ISBN: (纸本)9781467304290

A proper control of a system to get a desired function and increase the system lifetime is a crucial step towards the sustainable paradigm- In this paper, such a control is designed for a cyclic pallet system to achieve a minimal force on its drive unit, meet safety conditions on the system chain tension force and the momentum of pallets, and fulfill the desired production rate. The optimal values of the control parameters, namely number of pallets and conveyor velocity, are obtained through solving a linear optimization model. The objective function in the model defines the average force on the drive unit in a cycle production. In addition, the related constraints characterize the pallet system properties such as cyclic and dynamic behavior, buffer size, constant work in process, and safety specifications. The robustness of the optimal control is analyzed, using a worst but safe control strategy. The optimal control and the robustness analysis are applied to some case studies, and the results are evaluated and discussed.

关键词： One-loop pallet system Tension force model mixed integer linear programming Optimal and robust control

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Optimal Storage Capacity within an Autonomous Micro Grid with a high Penetration of Renewable Energy Sources

Optimal Storage Capacity within an Autonomous Micro Grid wit...

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IEEE PES Innovative Smart Grid Technologies Europe

作者： P. Lombardi T. Sokolnikova K. V. Suslov Z. Styczynski Fraunhofer Institute for Factory Operation and Automation IFF Department of Power Supply and Electrical Engineering of Irkutsk State Technical University (ISTU) Otto-von-Guericke-University Magdeburg

ISBN: (纸本)9781467325950

Some Renewable Energy Sources (RES), such as wind and solar, produce power intermittently according to the weather conditions rather than to the power demanded. Energy Storage Systems (ESS) may be used to mitigate the intermittent generation from RES and to increase the quality of power supply. This study aims to find the relationship between the generation from RES and the needed amount of ESS. An autonomous microgrid has been analyzed in which a part of electricity demanded during one year is generated by Wind Turbines and Photovoltaic plants (PV), while the remaining part is produced by fuel based generators. An intelligent Energy Management System (EMS) optimally schedules the fuel based generators according to the load demanded, the weather conditions and to the electricity generation costs. The optimal storage needed to balance the system for different scenarios were investigated and results of this investigation are shown and discussed in this paper.

关键词： Autonomous microgrid Energy storage systems mixed integer linear programming Renewable energy sources Smart grid

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Platform for Coordination of Energy Generation and Consumption in Residential Neighborhoods

Platform for Coordination of Energy Generation and Consumpti...

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IEEE PES Innovative Smart Grid Technologies Europe

作者： Vladimir Bicik Ondrej Holub Karel Marik Marek Sikora Petr Stluka Reinhilde D'hulst Department of Computer Science FIT Czech Technical University Honeywell Prague Laboratory VITO NV

ISBN: (纸本)9781467325950

This article presents a platform, which aims at energy savings in residential neighborhoods via coordination of energy generation and consumption. The platform includes hardware infrastructure and service oriented information system. While an overview of the platform is given, the energy management services are described in more detail. Assessment of platform robustness, flexibility and scalability is provided and demonstrated on examples.

关键词： Generation to Consumption Matching mixed integer linear programming Residential Neighborhoods Service Oriented Architecture

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OPTIMAL CHANNEL ASSIGNMENT FOR IEEE 802.11 MULTI-CELL WLANS

OPTIMAL CHANNEL ASSIGNMENT FOR IEEE 802.11 MULTI-CELL WLANS

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European Signal Processing Conference

作者： Mohamed Elwekeil Masoud Alghoniemy Mostafa El-Khamy Hiroshi Furukawa Osamu Muta Electronics and Communications Engineering Department Egypt-Japan University of Science and Technology (E-JUST) Advanced Information Technology Department Kyushu University

ISBN: (纸本)9781467310680

In this paper, we propose a new formulation for solving the channel assignment problem for Multi-cell WLANs as a mixed integer linear programming (MILP) problem. The objective is to minimize the total interference seen by all Access Points (APs). The main advantage of the proposed algorithm is that it provides a global solution and at the same time guarantees non-overlapping channel assignment. The proposed channel assignment formulation can be used for different topologies of WLAN as demonstrated in the simulation. Simulation results show that the proposed algorithm outperforms the pick-first greedy algorithm and the single channel assignment method. The proposed channel assignment technique reduces the total interference at all APs which leads to an improved throughput.

关键词： WLAN IEEE 802.11 Radio resource management Channel assignment mixed integer linear programming Channel allocation channel assignment problem wireless local area network (WLAN) greedy algorithm Apus mixed integer linear programming

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An approximate mixed integer linear programming (MILP) model for the design of water reuse/recycle networks with minimum emergy

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ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING 2007年第6期2卷 566-574页

作者： Tan, R. R. Foo, D. C. Y. Ng, D. K. S. Chiang, C. L. Hu, S. Ku-Pineda, V. De La Salle Univ Dept Chem Engn Manila 1004 Philippines Univ Nottingham Malaysia Sch Chem & Environm Engn Semenyih 43500 Selangor Malaysia Inst Technol Cambodia Chem & Food Technol Dept Phnom Penh Cambodia

Recent trends in process engineering have placed increased emphasis on the design of inherently clean and efficient processes. For example, a wide range of pinch analysis and mathematical programming methods have been developed for designing schemes for water reuse/recycle in industrial plants for both grassroot design and plant retrofit. In the latter case, the conventional approach is to maximize water recovery and thereby minimize fresh water demand and effluent volume. However, it is possible that with such an approach the reductions in environmental impact brought about by saving water can be offset by other impacts arising from increased use of energy and materials in the plant after retrofit. This work presents a model for minimizing the total resource consumption impact of a water reuse/recycle network. The total impact is expressed in terms of emergy - a measure of cumulative solar energy inputs into a life cycle system. A simplified model is proposed that focuses on the impact contributions of water, electrical power and material for capital goods. Two case studies illustrate the approach. Results show that the network with the lowest total impact can be found by sacrificing water recovery for savings in energy and material use. (c) 2007 Curtin University of Technology and John Wiley & Sons, Ltd.

关键词： water reuse/recycle networks mixed integer linear programming life cycle emergy

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Distribution Network Expansion Planning with Optimal Siting and Sizing of Electric Vehicle Charging Stations

Distribution Network Expansion Planning with Optimal Siting ...

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International Universities Power Engineering Conference

作者： Zechun Hu Yonghua Song Department of Electrical Engineering Tsinghua University

ISBN: (纸本)9781467328548

The investment of connecting charging stations into distribution networks should be considered in the optimal planning of charging stations for electric vehicles (EVs). This paper proposes a mathematical model for multistage distribution network expansion planning taking optimal siting and sizing of EV charging stations into account. In the proposed model, the capacity of existing substations can be increased, existing network feeders can be replaced with wider section feeders, new feeders and new charging stations can be built. Network security constraints are considered. A new constraint is formulated to guarantee the topology of the obtained distribution network is radial. Numerical results indicate that the proposed method can allocate charging capacity among candidate charging station sites optimally, and the total investment and operating cost of the distribution network is reduced.

关键词： Charging Station Distribution Network Electric Vehicle Expansion Planning mixed integer linear programming

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