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Utilization of Low Voltage In-Line Power Regulator for reliable integration & performance of DER technologies

Utilization of Low Voltage In-Line Power Regulator for relia...

引用

IEEE Power and Energy Society General Meeting

作者： M. A. Tabrizi M. Sahni N. Prakash Vincent Martinelli James Simonelli Power System Planning DNV GL Energy Advisory Gridco Systems

ISBN: (纸本)9781467380416

The increasing penetration of DER technologies is accompanied with challenges associated with changing system operation characteristics. Some of these challenges include load voltage regulation, reverse power flow issues, volt/VAR optimization and optimal use of sub-transmission and distribution facilities to reliably operate the system. This paper discusses the concept of a Low Voltage In-Line Power Regulator (LV-IPR) as a means to provide the necessary load voltage regulation and reactive compensation (under bi-directional power flow conditions) for reliable integration of DER technologies. A simplified dynamic model for the LV-IPR has been developed for the purposes of sub-transmission system studies and benchmarked with the detailed model. The performance of the LV-IPR has been evaluated on a sample utility distribution feeder in terms of its ability to provide load voltage regulation, reactive compensation and enhanced reliability for distributed PV integration. Finally, the capability of the LV-IPR to ensure no interference with the conventional protection schemes on the distribution system has also been established.

关键词： Distribution system Renewable energy Voltage regulator dispensing system Low voltage Renewable energy power conditioner density estimation robust algorithm Voltage regulators reactive compensation load voltage Voltage regulation auxiliary transmission distribution facilities

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A route to chaos with a chain of homoclinic bifurcations in a modified Bonhoffer-van der Pol equation

A route to chaos with a chain of homoclinic bifurcations in ...

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Annual Conference of Industrial Electronics Society

作者： K. Tsumoto T. Yoshinaga H. Kawakami Faculty of Engineering University of Tokushima Tokushima Japan School of Medical Sciences University of Tokushima Tokushima Japan

We survey a mechanism of a route to chaos due to a successive bifurcation process including a chain of homoclinic bifurcations observed in a modified Bonhoffer-van der Pol equation. The occurrence of homoclinic bifurcations is confirmed by using the linking number of limit cycles related with the stable manifold through an equilibrium.

关键词： Chaos Bifurcation density estimation robust algorithm Joining processes Limit-cycles Circuits Nonlinear equations Biomedical engineering Chemicals Circadian rhythm

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Assigning membership degrees to points of fuzzy boundaries

Assigning membership degrees to points of fuzzy boundaries

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Conference of the North American Fuzzy Information Processing Society - NAFIPS

作者： J. Verstraete B. Van Der Cruyssen R. De Caluwe Department of Telecommunication and Information Processing Computer Science Laboratory Ghent University Ghent Belgium

There has been a growing interest in the field of geographic information systems (GIS) to model vague and uncertain regions for which information about a given property is available (e.g. soil structure). Vague and uncertain mean in general that some knowledge is available about the position and the circumference of such a region, but that the information is mostly imprecise or lacks certainty. Either this lack of precise data is inherent to the property (e.g. the degree of soil pollution), or it is due to physical limitations in making accurate measurements (e.g. temperature). There has been some research in modeling such regions using fuzzy regions. Fuzzy regions are modeled by means of broad boundaries. A broad boundary is defined as the area enclosed between two non-intersecting crisp edges including these edges, one completely located within the other. Inside and on the inner edge lay the points for which the definition of the property is completely met; outside and on the outer edge lay the points for which the definition of the property is not at all met. Points of the broad boundary meet the definition of the property up to a certain extent. Up to now, mainly the applicability of the traditional set operators on fuzzy regions (intersection, inclusion and union) has been addressed in the literature. Furthermore, almost no contributions treat the degree to which the points in the fuzzy region come up to the given definition of a property. We present two methods to solve the latter problem, both from a theoretical as well as from a practical point of view.

关键词： Geographic Information Systems Temperature measurement Fuzzy set theory density estimation robust algorithm Computer science Laboratories Information processing Electronic mail Soil pollution Pollution measurement

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Active User Participation in Energy Markets Through Activation of Distributed Energy Resources

Active User Participation in Energy Markets Through Activati...

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IEEE General Meeting Power& Energy Society

作者： J. Driesen G. Deconinck W. D'haeseleer R. Belmans Department of Electrical Engineering research groupELECTA Katholieke Universiteit Leuven Leuven Belgium Mechanical Engineering Department TME Leuven Belgium

Customers in liberalized energy markets do not have tools in hand to contribute to the balancing of undispatchable distributed generation and the uncontrolled loads. This paper discusses how an activation of the loads could make users more involved in energy markets and indirectly support the sustainable deployment of distributed generation often based on locally available renewable energy sources. As such, a contribution is made to the security of supply through a larger resource diversification and the smaller customers may be engaged in delivering certain types of ancillary services such as reserve provision.

关键词： Energy resources Wind energy Power generation Distributed control Wind energy generation Cogeneration Solar power generation Security Mesh generation density estimation robust algorithm

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Microgrid laboratory facilities

Microgrid laboratory facilities

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International Conference on Future Power Systems

作者： M. Barnes A. Dimeas A. Engler C. Fitzer N. Hatziargyriou C. Jones S. Papathanassiou M. Vandenbergh School of Electrical and Electronic Engineering University of Manchester Institute of Science and Technology Manchester UK Department of Electrical and Computer Engineering National and Technical University of Athens Athens Greece Department of Engineering and Power Electronics Institut fur Solare Energieversorgungstechnik Kassel Germany

Within the frame of the European project "Microgrids" several test set-ups have been installed or enlarged at different laboratories. Three of them are presented in this contribution: a specially designed single phase system of the NTUA with agent control software, the DeMoTec at ISET, which is a general test site for DER and the flywheel test rig, designed by the University of Manchester. These three sites allow the tests of different components, control strategies and different storage technologies. Though this contribution is aimed at the presentation of the facilities themselves, some test results are included

关键词： Laboratories Batteries Control systems System testing Pulse width modulation inverters Software testing Wind turbines Frequency density estimation robust algorithm Flywheels

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A roadmap for distribution energy management via multiobjective optimization

A roadmap for distribution energy management via multiobject...

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IEEE General Meeting Power& Energy Society

作者： Bharadwaj R. Sathyanarayana Gerald T. Heydt Department of Electrical Computer and Energy Engineering Arizona State University Tempe AZ USA

Multiobjective optimization has been applied to the problem of optimal energy management in power distribution systems. Future distribution systems with increased deployment of distributed energy storage devices and distributed energy resources are being designed under the aegis of a number of sectors of the power engineering community. This includes the National Science Foundation supported Future Renewable Electric Energy Distribution Management (FREEDM) center. A technical roadmap for the FREEDM center distribution system is proposed that is based on multiobjective optimization. Diverse objectives in the optimal control of the distribution energy management system are handled through a Pareto optimal approach. The normal boundary intersection method is used to develop a Pareto optimal front and solving the multiobjective optimization subroutine has been approached through separable programming techniques. Uncertainty in load demand and distributed resource power output are incorporated in the test cases studied to formulate a robust algorithm for distribution energy management. The paper also makes brief reference to the Smart Grid and its objectives - and how the proposed distribution energy management fits into this initiative.

关键词： Optimization Energy management Energy storage Converters Programming Minimization density estimation robust algorithm

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Cluster criterion functions in spectral subspace and their application in speaker clustering

Cluster criterion functions in spectral subspace and their a...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Trung Hieu Nguyen Haizhou Li Eng Siong Chng Department of Human Language Technology Institute for Infocomm Research Singapore School of Computer Engineering Nanyang Technological University Singapore

In this paper, we propose two cluster criterion functions which aim to maximize the separation between intra-cluster distances and inter-cluster distances. These criteria can automatically deduce the desired number of clusters based on their extremized values. We then propose an algorithm to apply our criterion functions in conjunction with spectral clustering. By exploiting the characteristic of spectral subspace, we show that the speakers are more separable in this subspace which will further enhance the effectiveness of our proposed criteria. The algorithm is used in our agglomerative hierarchical speaker diarization system to test on Rich Transcription 2007 conference data set and obtains very good results.

关键词： Clustering algorithms density estimation robust algorithm Humans Natural languages Poles and towers System testing Clustering methods Mathematical analysis Error analysis Partitioning algorithms

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Emergency electric service restoration in the aftermath of a natural disaster

Emergency electric service restoration in the aftermath of a...

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IEEE Global Humanitarian Technology Conference (GHTC)

作者： Moein Choobineh Salman Mohagheghi Electrical Engineering and Computer Science School of Mines Golden CO

The colossal amount of energy released by natural disaster events can devastate the critical infrastructure of affected cities and rural regions. Possible damages to the electric power grid can lead to large-scale interruption in electric service, which could greatly impede post-disaster relief efforts. To make communities resilient against natural hazards, the power grid must have post-disaster self-healing capability, allowing it to restore power to as many sections of the network as possible within a reasonably short timeframe. Traditionally, electric service restoration is performed by first identifying alternative substations and possible routes, followed by network reconfiguration, so that the outage area can be re-energized via these substations. However, this approach may not be possible in the aftermath of a natural disaster. This is because many parts of the network may already have become non-operational due to direct or indirect damages incurred by the event. Here, service restoration can be achieved through a decentralized approach where one or more Microgrids are formed in order to supply the loads locally. A Microgrid dispatch solution is proposed in this paper for emergency electric service restoration in the aftermath of a natural disaster event. A nonlinear mixed-integer optimization problem is formulated that finds the optimal dispatch of the energy resources within the Microgrid subject to capacity and fuel availability constraints. To demonstrate the applicability of the solution, a case study is provided using the IEEE 123-bus test distribution system.

关键词： Batteries Microgrids Fuels Indexes density estimation robust algorithm

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Performance comparison of automatic peak detection for portable signal analyser

Performance comparison of automatic peak detection for porta...

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IEEE EMBS Conference on Biomedical Engineering and Sciences (IECBES)

作者： Teh Yi Jun Asral Bahari Jambek Uda Hashim School of Microelectronic Engineering Universiti Malaysia Perlis Perlis Malaysia Insitulte of Nano Electronic Engineering Universiti Malaysia Perlis Perlis Malaysia

ISBN: (纸本)9781467377928

The aim of this paper is to discuss the automatic threshold peak detection method. An automatic threshold peak detection algorithm is simulated with a control signal in MATLAB to determine ability to detect different signal types. A comparison is made between automatic chromatographic peak detection, adaptive threshold detection, peak of Shannon energy envelop detection, and automatic multiscale peak detection. Based on the experiment results, automatic threshold peak detection can perform peak detection for sinusoidal or triangular signal but not pulse signal. Other algorithms can perform peak detection for pulse signal but not sinusoidal or triangular signal. Automatic threshold peak detection is about 4.47 times faster than peak of Shannon energy envelop and 3980 times faster than automatic multiscale peak detection; however, automatic threshold peak detection is about twice as slow as the adaptive threshold method and automatic chromatographic peak detection.

关键词： Biosensors Sensitivity density estimation robust algorithm Conferences Biomedical engineering MATLAB Impedance

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Integration of IEC 61850 into a Distributed Energy Resources system in a smart green building

Integration of IEC 61850 into a Distributed Energy Resources...

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IEEE General Meeting Power& Energy Society

作者： Rui Huang Eun-Kyu Lee Chi-Cheng Chu Rajit Gadh Smart Grid Energy Reseach Center University of California Los Angeles

A Distributed Energy Resources (DER) system, composed of distributed generation and storage units, has been proposed as a promising enhancement to the traditional power grids. One key challenge to implement a DER system, however, places on standardizing the communication network for seamless information exchange. As one approach, this paper focuses on integrating IEC 61850, which is an international unified standard for standardizing the communication network within a substation, into a DER system, using the UCLA SMERC building as test bed. To this end, we discuss a mathematical model of PV generation, present a representative demand profile, and develop a battery charging/discharging control algorithm. Moreover, we demonstrate a procedure to integrate IEC 61850 into the DER system step by step, with configuring the communication network and defining the data structure for the information exchange.

关键词： IEC standards density estimation robust algorithm Batteries Buildings Communication networks Mathematical model System-on-chip

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