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检索条件"主题词=Density estimation robust algorithm"

共 1003 条记录，以下是211-220 订阅

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Islanding Control of a Distributed Generation Unit's Power Conversion System to the Electric Utility Grid

Islanding Control of a Distributed Generation Unit's Power C...

引用

Annual IEEE Conference on Power Electronics Specialists (PESC)

作者： T. Thacker F. Wang D. Boroyevich Center for Power Electronics Systems The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

This paper addresses the design issues of a power conversion system (PCS) with regards to distributed generation (DG) and intentional islanding; in particular, control algorithms with active islanding detection and re-closure schemes for the inverter(s) that directly interface the PCS to the utility grid. The proposed control strategies and new active detection and reclosure schemes in this paper allows for fast disconnect times, a zero non-detection zone, and autonomous operation from the grid. The detection and re-closure schemes work with the switched-mode operation of the control to permit the PCS to continuously supply power to the loads. The control, detection and re-closure algorithms are compared to other schemes and verified through simulation

关键词： Distributed control Control systems Power conversion Personal communication networks Event detection Power system reliability density estimation robust algorithm Power system interconnection Power systems Power system simulation

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Roots of star events

Roots of star events

引用

IEEE Annual Symposium on Switching and Automata Theory

作者： J. A. Brzozowski Department of Electrical Engineering University of Ottawa Ottawa ONT Canada

A regular event W is a star event iff there exists another event V such that W = V*. In that case, V is called a root of W. It is shown that every regular event has a unique minimum root, which is contained in every other root of W. An algorithm for finding the minimum root is presented, and the root is shown to be regular. The results have applications to languages, codes, canonical forms for regular expressions, simplification of expressions, decomposition of sequential machines, and semigroup theory.

关键词： Equations Strontium Silicon Finite element methods Electrical engineering Reviews Automata Terminology Displays Testing Chromium density estimation robust algorithm

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Quality-based event reliability protocol in wireless sensor networks

Quality-based event reliability protocol in wireless sensor ...

引用

Consumer Communications and Networking Conference, CCNC IEEE

作者： Hosung Park Jeongcheol Lee Seungmin Oh Yongbin Yim Sang-Ha Kim Ki-Dong Nam Department of Computer Engineering Chungnam National University Daejeon South Korea Electronics and Telecommunications Research Institute Daejeon South Korea

For reliable event detection in wireless sensor networks, a sink requires collective information reported by sensor nodes sensing an event. In other words, the sink has to receive a certain amount of data dealing with the event for reliable event detection. Existing studies propose quantity-based event reliability protocols that improve event reliability by increasing the number of data successfully transmitted by controlling transport process. These studies present diverse schemes to successfully transmit as many reporting data as possible such as diversification of routing path for congestion avoidance and control of data reporting frequency rate for transport error compensation. However, since it frequently happens that wireless sensor networks with restricted capacity cannot deliver more than required amount of data due to data collision and congestion, the quantity-based event reliability protocols have limitation to raise the possibility of event detection. In this paper, we proposes a Quality-based Event Reliability Protocol (QERP) utilizing a property that the reporting data from sensor nodes are different in the contribution degree (CD) for event detection according to their environmental conditions. QERP selects sensor nodes to send their reporting data according to CD, and differentially transports them by CD-based buffer management and load balancing. Simulation results show that QERP detect more reliably and energy-efficiently an event than quantity-based event reliability protocols.

关键词： Reliability density estimation robust algorithm Event detection Protocols Lead Load management

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Controlling and modeling power-electronic interface DERs in islanding mode operation micro grid

Controlling and modeling power-electronic interface DERs in ...

引用

IEEE Symposium on Industrial Electronics & Applications (ISIEA)

作者： M. H. Ashourian A. A. Mohd Zin A. S. Mokhtar S.J Mirazimi Z. Muda Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Johor Malaysia

Distributed energy resources (DERs) such as micro turbine, wind turbine, fuel cell, photovoltaic system and so on, which are high-efficient, high quality and high reliable electrical sources, are been able to create flexible control on power generation during the islanded mode operation of micro grid by power-electronic interface. Performances of two types of inverter controller (PQ controller and VSI controller) show the important role of each model in balancing and power sharing within the islanded network. PQ controller prepares constant active power at specified power factor and VSI controller regulates frequency and voltage through system. This paper is prepared to model two kinds of controller and then investigated the role of controllers through changing load demand and output power of DERs during the islanded network. Moreover appropriate method for handling DERs such as PQ and VSI controller will be proposed in a simulation program which is developed using MATLAB ® for one case study. The results are shown and compared in an abbreviated manner.

关键词： Voltage control Reactive power Frequency control Load modeling Inverters density estimation robust algorithm Power generation

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Review of microgrid technology

Review of microgrid technology

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International Conference on QiR (Quality in Research)

作者： B. S. Hartono Yan Budiyanto Rudy Setiabudy Faculty of Engineering Universitas Indonesia Depok Faculty of Engineering Universitas Indonesia Depok Jawa Barat ID Faculty of Engineering Universitas Indonesia Depok Indonesia

The use of renewable energy source (RES) in meet the demand of electrical energy is getting into attention as solution of the problem a deficit of electrical energy. Application of RES in electricity generation system is done in a variety of configurations, among others in microgrid system. Implementation of microgrid systems provide many advantages both from the user and from the electric utility provider. Many microgrid development carried out in several countries, because microgrid offers many advantages, including better power quality and more environmentally friendly. Microgrid development concern in technology generation, microgrid architecture, power electronics, control systems, protection systems. This paper reviewing various technological developments related to microgrid system and case study about microgrid system development using grid tie inverter (GTI). Microgrid system can implemented using GTI, power transfer can occur from GTI to grid when GTI has power excess and grid supplying power to GTI when GTI power shortage.

关键词： Microgrids density estimation robust algorithm Voltage control Frequency control Control systems Power electronics Power generation

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Autonomous cooperative agent based flexible distribution of Energy and Storage resources

Autonomous cooperative agent based flexible distribution of ...

引用

International Conference on Power Electronic Drives and Energy Systems for Industrial Growth

作者： Mohammed A. Haj-Ahmed Hussam J. Khasawneh Mahesh S. Illindala The Ohio State University Columbus OH

A new framework for integrating distributed energy resources (DERs) and energy storage devices, known as Flexible Distribution of EneRgy and Storage resources (FDERS), has been proposed recently. It offers the benefits of increased DER lifetime, optimal energy storage deployment, enhanced controllability and improved system robustness. This paper presents an autonomous cooperative agent based FDERS system. The pecking order or hierarchy of distributed energy and storage resources in FDERS can be varied based on the energy resource availability, response characteristics or fuel pricing of individual DERs. Such a hierarchical scheme may at first suggest a centralized control philosophy, but this paper has presented an improved and decentralized cooperative strategy with intelligent agents processing local information for delivering the larger system goals.

关键词： density estimation robust algorithm Batteries Aging Microgrids Energy resources Birds

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Alarm transmission for distributed energy resources over power line communication

Alarm transmission for distributed energy resources over pow...

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IEEE Power Engineering and Automation Conference (PEAM)

作者： Christoph Becker Heinz Frank Markus Stuhler Klaus Fleischmann Hochschule Heilbronn Heilbronn Baden-WÃ¼rttemberg DE Unitro-Fleischmann Backnang Germany

ISBN: (纸本)9781457715983

For distributed energy resources (DER), which are located outside of towns, hazard monitoring systems are required to detect risks of theft, vandalism and fire. If there is a hazard detected, an alarm-message must be transmitted to a remote alarm control unit which is operated day and night. For the transmission of alarm messages, specific technical requirements must be fulfilled. In this paper an alarm transmission system is presented, which is based on a modular microcontroller system, which was developed in particular for its use in the field of power engineering. For the alarm transmission the VdS 2465-protocol, which is a German standard for alarm transmissions, was implemented on the microcontrollers. To achieve cost effective systems, the VdS 2465-protocol can be operated not only over GSM- and Ethernet-networks but also over power line communication (PLC). Two applications are presented for the alarm transmission over PLC. One is a proposal for the transmission of alarms within DER-facilities. In another suggestion it is described how a PLC can enable a wired communication between a DER-facility and an alarm control unit when there is no access to a public wired network available at the DER-facility.

关键词： Microcontrollers Alarm systems Protocols Power line communications Hazards Standards density estimation robust algorithm

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Voltage regulation optimization in low voltage network based on Voltage Quality Index

Voltage regulation optimization in low voltage network based...

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International Scientific Conference on Electric Power Engineering (EPE)

作者： Marek Kopicka Jiri Drapela David Topolanek Faculty of Electrical Engineering and Communication Brno University of Technology Brno Czech Republic

The paper deals with an optimization procedure in terms of a network voltage parameters improvement. A software based approach is used to select optimal type of voltage regulator, its power and ideal location for application in a Low-Voltage (LV) test network, where it is required to enhance Voltage Quality (VQ). The test network presents a case where application of on-load tap changer transformer instead of conventional distribution transformer MV/LV is not adequate to maintain voltage profile in the LV system in limits. Therefore other type of voltage regulator has to be employed to increase VQ in the entire LV network. Principal measure for VQ evaluation there is adopted a Voltage Quality Index expressing the VQ level in dependence on selected and specified input parameters, which may be voltage magnitude, unbalance, harmonic distortion, flicker level and frequency. Within optimization process, maximal current carrying capacity of lines, network losses and cost of solutions are also taken into account.

关键词： Voltage control Regulators Optimization Load modeling density estimation robust algorithm PSCAD Indexes

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A hybrid CMA-ES approach for distributed grid compliant energy scheduling

A hybrid CMA-ES approach for distributed grid compliant ener...

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IEEE Symposium Series on Computational Intelligence (SSCI)

作者： Jörg Bremer Sebastian Lehnhoff Department of Computing Science University of Oldenburg Germany

An ever growing share of renewable energy resources in the distribution grid imposes fluctuating and hardly predictable feed-in and thus demands new control strategies. On the other hand, combined with controllable, shiftable loads and battery capacity, these energy units set up new flexibility potentials for ICT-based control. So far, many approaches for harnessing this potential neglect the indispensable grid compliance of scheduling results due to the high computational complexity. We present a hybrid approach that enables distributed, agent-based algorithms for predictive energy planning to incorporate grid friendly behavior into agents' decision routines. We propose a scheme using a covariance matrix adaption evolution strategy (CMA-ES) for deciding on grid compliant solutions in a many-objective approach. The integration with an agent-based greedy algorithm for decentralized predictive scheduling is demonstrated and the effectiveness of the approach is shown by several simulation experiments.

关键词： Schedules density estimation robust algorithm Smart grids Optimization Decoding Scheduling

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Models of Distributed Energy Resources markets in distribution grid operations

Models of Distributed Energy Resources markets in distributi...

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IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe)

作者： J. Kumar A. Jayantilal Alstom Grid WA USA

The electric utility industry is investing significantly in multiple Distributed Energy Resources (DER) technologies including renewable, distributed generation, smart metering infrastructure, home energy smart devices and automation systems. Such investments are expected to encourage active engagement of end customers and distributed resources resulting into overall cost savings and greener environment. This fast voluminous growth of DER assets at different voltage levels on the electric distribution grid poses unique challenges and opportunities to grid operations. This paper describes a new paradigm for developing DER market models for advanced distribution grid operations enabled through a new generation of information and communications technology. Such models and associated algorithms illustrate the possibility of various novel approaches for significant incremental value additions to the DER asset investment. The paper concludes with the issues, risks and challenges in the proposed market model implementation.

关键词： density estimation robust algorithm Planning Load modeling Energy resources Distributed power generation Load management Mobile communication

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