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检索条件"主题词=Mixed integer linear programming"

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Controlling Multiple Batteries on a Radial Line 24

Controlling Multiple Batteries on a Radial Line

引用

Australasian Universities Power Engineering Conference (AUPEC)

作者： Nekouei, Ehsan Alpcan, Tansu Brandao, Miguel Univ Melbourne GE Energy Melbourne Vic 3010 Australia Univ Melbourne Dept Elect & Elect Engn Melbourne Vic 3010 Australia

ISBN: (纸本)9780646923758

This paper studies the problem of optimizing the performance of multiple batteries located in a radial distribution line under the network constraints. A centralized controlling unit minimizes the charge/discharge costs of the batteries by coordinating the operation modes of the batteries on the line as well as their current input/output. The considered optimization problem is formulated as a mixed-integer-linear-program (MILP) in which the batteries' currents are limited by voltage drop constraints, current rating constraints, battery capacity constraints and charge/discharge coordination constraints. The latter constraint is proposed to ensure that all batteries simultaneously operate in only one of the operation modes, i.e. charge or discharge, to avoid the undesirable situation wherein a subset of the batteries charge the rest of batteries. Our numerical results show that the proposed MILP effectively manages the operation of the batteries while satisfying the distribution network constraints.

关键词： Battery coordination Distribution constraints mixed integer linear programming

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Joint Discrete Phase-Only Broadcast Beamforming With Antenna Selection

Joint Discrete Phase-Only Broadcast Beamforming With Antenna...

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22nd IEEE Signal Processing and Communications Applications Conference (SIU)

作者： Demir, Ozlem Tugfe Tuncer, T. Engin Orta Dogu Tekn Univ Elekt Elekt Muhendisligi Bolumu Ankara Turkey

ISBN: (纸本)9781479948741

In this paper, single group multicast (broadcast) phase-only transmit beamformer design with antenna subset selection is considered. The problem is converted into a linear form and solved efficiently by using mixed integer linear programming to find the optimum subset of antennas and beamformer vector. Several experiments are done and it is shown that the proposed approach is effective and efficient.

关键词： transmit beamformer discrete beamformer mixed integer linear programming antenna selection

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An MILP Model for the Plug-In Electric Vehicle Charging Coordination Problem in Electrical Distribution Systems

An MILP Model for the Plug-In Electric Vehicle Charging Coor...

引用

IEEE PES General Meeting

作者： Franco, John F. Rider, Marcos J. Romero, Ruben Univ Estadual Paulista Fac Engn Ilha Solteira Dept Elect Engn Ilha Solteira SP Brazil

ISBN: (纸本)9781479964154

A new mixed-integer linear programming (MILP) model is proposed to represent the plug-in electric vehicles (PEVs) charging coordination problem in electrical distribution systems. The proposed model defines the optimal charging schedule for each division of the considered period of time that minimizes the total energy costs. Moreover, priority charging criteria is taken into account. The steady-state operation of the electrical distribution system, as well as the PEV batteries charging is mathematically represented;furthermore, constraints related to limits of voltage, current and power generation are included. The proposed mathematical model was applied in an electrical distribution system used in the specialized literature and the results show that the model can be used in the solution of the PEVs charging problem.

关键词： Electrical distribution system plug-in electric vehicles mixed integer linear programming optimal charging

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Fair Resource Allocation in Multiuser OFDMA Downlink with Passive Eavesdropping 10

Fair Resource Allocation in Multiuser OFDMA Downlink with Pa...

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10th IEEE International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

作者： Karachontzitis, Sotiris Timotheou, Stelios Krikidis, Ioannis Berberidis, Kostas Univ Patras Comp Engn & Informat Dept Patras Greece Univ Patras RACTU RU 8 Patras Greece Univ Cyprus Dept Elect & Comp Engn Nicosia Cyprus Univ Cyprus KIOS Res Ctr Intelligent Syst & Networks Nicosia Cyprus

ISBN: (纸本)9781479950416

In this paper, we study the problem of resource allocation for a multiuser orthogonal frequency-division multiple access (OFDMA) downlink with eavesdropping. The considered setup consists of a base station, several users and a single eavesdropper that indents to wiretap the transmitted message within each OFDMA subchannel. By taking into consideration the existence of the eavesdropper, the base station aims to assign subchannels and allocate the available power in order to optimize the max-min fairness criterion over the users' secrecy rate. The investigated problem is hard to be solved because of its combinatorial and nonlinear nature. Thus, optimality is discussed for two particular cases where the available power tends to infinity and zero, respectively. The optimal solution is obtained by formulating a mixed integer linear problem in the first case and a series of linear sum assignment problems in the second. In addition, two low-complexity solutions are presented which are based on decoupling the subchannel and the power allocation subproblems. Numerical results are provided to illustrate the performance of the presented solutions.

关键词： Resource allocation physical layer security mixed integer linear programming linear sum assignment problem

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European Power Exchange day-ahead market clearing with Benders Decomposition

European Power Exchange day-ahead market clearing with Bende...

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2014 Power Systems Computation Conference (PSCC)

作者： Dourbois, Grigoris A. Biskas, Pandelis N. Aristotle Univ Thessaloniki Dept Elect & Comp Engn Thessaloniki 54124 Greece

ISBN: (纸本)9788393580132

A European Power Exchange day-ahead market with both simple and combinatorial products is modeled in this paper and cleared using Benders Decomposition. Except from simple hourly supply offers and demand bids, the products comprise supply and demand profile block offers/bids, and supply and demand linked profile block offers/bids. The problem constitutes a mixed integer linear programming model having a decomposable structure, which is decomposed in terms of binary and continuous variables, and solved using the Benders Decomposition approach. The master problem includes the binary variables, the decisions of which are transferred to the sub-problem, which incorporates the problem continuous variables. The iterations of Benders method constitute inner iterations;outer iterations are also performed in order to handle the paradoxically accepted and rejected blocks. The overall algorithm converges to the solution of the original MILP problem. The proposed approach is evaluated using the IEEE RTS-96 three-area test system.

关键词： Power Exchange day-ahead electricity market clearing mixed integer linear programming Benders Decomposition Paradoxically accepted/rejected blocks

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Simplified representation of a large transmission network for use in long-term expansion planning

Simplified representation of a large transmission network fo...

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2014 Power Systems Computation Conference (PSCC)

作者： Fezeu, Claude-Alexandra Bell, Keith Ding, Jiansong Panciatici, Patrick Debry, Marie-Sophie Reseau Transport Elect Paris France Univ Strathclyde Glasgow G1 1XQ Lanark Scotland

ISBN: (纸本)9788393580132

This paper concerns the development of a new approach to the simplification of representation of the spatial dimension of a large transmission network in order that the influences on bulk power transfers can be assessed in a practical way and the main routes that should be reinforced readily identified. The main challenge is to achieve a satisfactory clustering to deliver a number of zones that is small enough to make subsequent analysis of the expansion panning problem manageable but not so small as to neglect key regions of the original system. Two particular methods that have previously been proposed are described: a K-means algorithm and Dodu's mixed integer linear programming based approach. Each of them has some disadvantages, in particular that a direct interface between two zones might be derived that has no equivalent on the real network;or that it is difficult to control the number of zones. Hence, this paper describes a new hybrid method that ensures that resulting zonal delineations make engineering sense from the point of view of physical connections and allow some control over the number of zones. Results are presented in respect of the transmission network in Great Britain. Applications of the simplified network are discussed, not only in long-term planning but also in respect of the potential for use in transmission charging.

关键词： transmission planning electrical distance mixed integer linear programming K-means clustering

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mixed-integer optimisation based approach for design and operation of distributed energy systems 24

Mixed-integer optimisation based approach for design and ope...

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Australasian Universities Power Engineering Conference (AUPEC)

作者： Wouters, Carmen Fraga, Eric S. James, Adrian M. Polykarpou, Eleftheria M. Univ Coll London Sch Energy & Resources Adelaide SA Australia Univ Coll London Dept Chem Engn Ctr Proc Syst Engn Adelaide SA Australia

ISBN: (纸本)9780646923758

This paper presents an optimisation based approach for the design and operation of residential distributed energy systems. The mathematical model minimises the total annualised cost of the system to meet its total energy demand, selecting from a pool of distributed energy generation, supply and storage alternatives as well as microgrid (MG) operation and a heating pipeline network. Technical and financial characteristics of the technologies and area-specific climatological and tariff structures are integrated in the model which is implemented in GAMS. The focus is to identify the optimal energy system design of a residential neighbourhood coupled with optimal operation of the selected technologies under given demand profiles. Selected system design scenarios are researched to determine the impact of photovoltaic (PV) units as one of several technology alternatives and energy tariffs on residential distributed energy system design. Two similar residential neighbourhoods based in Athens (Greece) and Adelaide (Australia) are compared.

关键词： combined heat and power distributed generation energy integration microgrid mixed integer linear programming

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LUOPAN: Light Utility-Oriented Placement of Actuator Nodes in Sensor/Actuator Networks

LUOPAN: Light Utility-Oriented Placement of Actuator Nodes i...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Lei, Chi-Un Univ Hong Kong Dept Elect & Elect Engn Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781479934324

We develop a light utility-oriented placement of actuator nodes (LUOPAN) for wireless sensor/actuator networks (WSAN) to spread serving duties among actuator nodes (ANs). Through appropriate placement of ANs and allocation of serving duties, system deployment cost can be reduced, and the system longevity can be improved. By considering utility consumption and geographic distribution of required services, LUOPAN outperforms existing strategies (e.g. area coverage approach and greedy approach) in terms of operation efficiency and setup cost. A mixed integer linear programming is used to obtain an optimal solution in a discretized search space, with considerations of service fading and multi-scenario placements.

关键词： Accuracy Actuators Ad hoc networks Fading Optimization Wireless communication Wireless sensor networks actuators fading color CARRIER SYSTEM Ad hoc networks Wireless sensor networks mixed integer linear programming placement operating efficiency Ganglia greedy method

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Research on Wind Power Integration Capacity of Hydro-Thermal-Wind Power System with Energy Storage System

Research on Wind Power Integration Capacity of Hydro-Thermal...

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International Conference on Renewable Energy and Environmental Technology (REET 2013)

作者： Li, Feng Zhang, Lizi Wang, Yunyun Feng, Junshu North China Elect Power Univ Beijing Peoples R China

ISBN: (纸本)9783037859124

With the fast development of clean energy in China, the conflict between limited peak load regulation capability and the increasing installed wind power capacity became more and more obvious. Two different wind power integration dispatching modes were proposed in this paper, meanwhile, the wind power integration capacity and system economy under different scenarios, which have different wind power penetration and energy storage system(ESS) capacity, were also analyzed. As indicated in the example analysis, the ESS can significantly enhance the wind power integration capacity;and the economical wind power integration dispatching mode is the most suitable choice for the power grid in wind-rich area.

关键词： optimal scheduling mixed integer linear programming wind power integration capacity peak load regulation

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Switching Sequence Modelling for Network Reconfiguration 6

Switching Sequence Modelling for Network Reconfiguration

引用

IEEE PES Asia-Pacific Power and Energy Engineering Conference (IEEE PES APPEEC)

作者： Tian, Shijun Wang, Xifan Xiao, Yunpeng Xi An Jiao Tong Univ Sch Elect Engn Xian Peoples R China

ISBN: (纸本)9781479975372

Transmission switching as a powerful tool is utilized to change network topology during operations which, in turn, would lead to higher economic benefits of a power system. However, network reconfiguration includes a chain of time sequencing switching actions which can bring disturbances into systems. This paper proposes a model addresses the process of transmission switching. The objective is to minimize the time of network reconfiguration via appropriate arrangements of the switching sequences, switching time intervals and corresponding generation outputs under system operating limits and security constraints conditions. The proposed model is demonstrated on the IEEE 118-bus test system. Computational results show the importance and necessity of proper arrangements of switching sequence.

关键词： mixed integer linear programming network reconfiguration transmission switching

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