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Reliability-Based Incremental PMU Placement

IEEE TRANSACTIONS ON POWER SYSTEMS 2014年第6期29卷 2744-2752页

作者： Wang, Yang Wang, Caisheng Li, Wenyuan Li, Jian Lin, Feng Wayne State Univ Dept Elect & Comp Engn Detroit MI 48202 USA Chongqing Univ Chongqing 630044 Peoples R China BC Hydro & Power Author Vancouver BC V7X 1V5 Canada Chongqing Univ Sch Elect Engn State Key Lab Power Equipment & Syst Secur & New Chongqing 630044 Peoples R China

This paper presents a new reliability-based incremental phasor measurement unit (PMU) placement method via an enumeration-based integer linear programming optimization approach. By evaluating the proposed reliability indices for node and system observability, incremental PMUs are sequentially placed on the locations where the reliability of entire system's observability can be best improved at each step. As a result, a pre-set desired reliability of the system's observability can be achieved while using the minimal number of PMUs. The proposed method is generic and flexible in a way that different kinds of failures that impact the reliability of system observability can be easily included in the method. The 1st-order and 2nd-order failures of PMUs and lines are considered in this paper. The proposed method is validated using a 4-node system, the IEEE 14-node system and the IEEE RTS 96 test system. Simulation results show that the proposed method is effective and efficient in enhancing the reliability of observability for any system regardless of what the initial PMU placement of the system may be.

关键词： Enumeration method liner integer programming observability phasor measurement unit (PMU) placement reliability

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The Study on a Global Optimization Method of Web Services Composition Based on QoS

The Study on a Global Optimization Method of Web Services Co...

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2013 3rd International Conference on Social Sciences and Society(ICSSS 2013)

作者： Zeqiang Pan Jiangxi University of traditional Chinese Medicine Computer College

As a new application pattern, knowledge service has been rapidly developed in recent years. How to integrate the existent knowledge services to form a newly complex service is a popular research area. This paper presents a framework to support dynamically service composition. And then we focus on the global optimal model of knowledge services composition. The essence of the model is that the problem of dynamic service selection with QoS global optimal is transformed into a liner integer programming with QoS constraints. At last, a set of optimal service composition is produced by means of optimizing objective function, which fulfills requires of users and improves the dynamical and flexible capability of service composition.

关键词： knowledge service composition global optimization QoS liner integer programming

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A Global Optimization Method of Web Services Composition Based on QoS

A Global Optimization Method of Web Services Composition Bas...

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工程和商业管理国际学术会议

作者： Fan YAN School of Electrical and Electronic,North China Electric Power University,Beijing,China

As a new application pattern,know ledge service has been rapidly developed in recent *** to integrate the existent knowledge services to form a newly complex service is a popular research *** paper presents a framework to support dynamically service *** then we focus on the global optimal model of knowledge services com *** essence of the model is that the problem of dynamic service selection with QoS global optimal is transformed into a liner integer programming with QoS *** last,a set of optimal service composition is produced by means of optimizing objective function,which fulfills requires of users and improves the dynamical and flexible capability of service composition.

关键词： Knowledge service composition global optimization QoS liner integer programming

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