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19-21 Sept. 2016

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Displaying Results 1 - 25 of 39
  • [Title page]

    Publication Year: 2016, Page(s): 1
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  • [Copyright notice]

    Publication Year: 2016, Page(s): 2
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  • EPNet 2016 committees

    Publication Year: 2016, Page(s):3 - 5
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  • Conference overview

    Publication Year: 2016, Page(s):6 - 15
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  • Author index

    Publication Year: 2016, Page(s):16 - 26
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  • Dedicated communication protocols and network interfaces in time synchronization cyber security in complex distribution smart grid

    Publication Year: 2016, Page(s):1 - 10
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1426 KB) | HTML iconHTML

    We can observe development of electrical power systems related to ICT (Information and Communication Technologies) throughout the recent years. These technologies are used to improve management of technological processes, reading control and measurement data from remote devices, as well as to improve operation and efficiency of the entire electrical power system. Currently, ICT technologies make i... View full abstract»

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  • Application of voltage and current transformations of different transformer winding connections in analysis of voltage dips propagation

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB) | HTML iconHTML

    Matrices transformation of voltage and current transformers represent the amplitude and angular relationships between the voltages and currents of the secondary side and primary side. As a result, the selected state of asymmetry can be otherwise characterized by the primary and secondary side of the transformer depending on the connection system. For example, single-phase asymmetry on the primary ... View full abstract»

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  • Cluster analisis of long-term power quality data

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (302 KB) | HTML iconHTML

    Current methods for measurement and analysis of power quality is based on the selection of a representative period of time, usually a week, corresponding to normal operating conditions. However such conditions as variability of load and generation or changing the configuration of power system network may have a significant impact on the quality parameters of power system. In order to distinguish a... View full abstract»

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  • Quantum inspired evolutionary algorithm to improve parameters of neural models on example of polish electricity power exchange

    Publication Year: 2016, Page(s):1 - 8
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (345 KB) | HTML iconHTML

    Paper contains selected results of theoretical and practical research concerning the possibility of creating evolutionary algorithms inspired by quantum information technology to improve the performance of neural models. Particular focus was on calculating the quantum available for use in quantum evolutionary algorithms. It is noted that the parameters of the artificial neural network, especially ... View full abstract»

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  • Identification of the polish power exchange based on the data related to the day-ahead market

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (455 KB) | HTML iconHTML

    The work contains selected results of research related to identification modelling of the Polish Power Exchange (Towarowa Giełda Energii Elektrycznej S.A. - TGEE) obtained in MATLAB and Simulink using the System Identification Toolbox and Control System Toolbox. In order to obtain a parametric arx model of the Polish Power Exchange identification was performed using data for the first half ... View full abstract»

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  • Distance protection testing in an IEC 61850 environment

    Publication Year: 2016, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (338 KB) | HTML iconHTML

    Distance protection is a crucial element in the protection system of a transmission line. As the use of IEC 61850-compliant IEDs (Intelligent Electronic Devices) in substations grows, protection testing has to adapt in order to reliably and efficiently test these advanced protection relays. Testing IEC 61850 IEDs poses many challenges, not only because such devices usually combine protection and c... View full abstract»

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  • Signal parameters identification methods used in wide-area measurement systems

    Publication Year: 2016, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    The paper presents a new method identifying the magnitude and phase of signals measured in an electrical power system. The method can be used in Wide-Area Measurement Systems (WAMSs). It applies the signals sampling with varied frequency as well as an adaptive radial artificial neural network, which makes it possible to calculate the signals parameters with the accuracy specified in IEEE C37.118.1... View full abstract»

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  • Agent-based power system management — Concept of grid restoration

    Publication Year: 2016, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (411 KB) | HTML iconHTML

    After the blackout state, system operators must do all necessary action in order to restore the supply to disconnected loads. Grid restoration process can be formulated as optimization problem which encompasses status assessment, optimization of generation capability and load pickup. A specific restoration strategy is determined by a combination of the actions and operational constraints based on ... View full abstract»

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  • Support the work of Earth fault passage indicator in MV grid

    Publication Year: 2016, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (283 KB) | HTML iconHTML

    In this paper the issues related to the ability to modernize the neutral point of compensated MV grid and benefits associated with it are presented. In neutral point, one of two ways, introduces an additional voltage source that changes the conditions of the earth fault current and makes it easier to detect. This is particularly important when considering the work of fault current passage indicato... View full abstract»

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  • Control of low voltage microgrid in autonomous operation mode

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (370 KB) | HTML iconHTML

    In this paper a control strategy is presented allowing a low voltage microgrid (MG) to operate autonomously when being disconnected from the utility network. The considered MG consist of photovoltaic panels (PV), gas microturbine (MT), loads and energy storage (ES). It was assumed that in autonomous mode the microgrid operates according to Single Master Operation (SMO) strategy and the ES is a ref... View full abstract»

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  • Effectiveness of investigated photovoltaic system

    Publication Year: 2016, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB) | HTML iconHTML

    The paper includes the examination of the effectiveness of investigated photovoltaic system installed on the roof of one building of Wroclaw University of Science and Technology. The evaluated efficiency was done based on historical data measurements. Accordingly, measurement results were analyzed depending on the type of used PV modules, weather conditions and electrical parameters of the system.... View full abstract»

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  • Grounding methods in medium voltage networks

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (423 KB) | HTML iconHTML

    Paper describes different grounding methods, both conventional and innovative solutions. Advantages and disadvantages of different grounding methods are analyzed. Attention is paid to reliability of supply, equipment ageing related with different grounding methods and equipment failures. Operational experiences regarding controlled Petersen coil are given and methods of power system reliability mo... View full abstract»

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  • Utilization of the monitoring system for MV/LV transformers in smart grid application

    Publication Year: 2016, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB) | HTML iconHTML

    Continuous development of the power grid infrastructure in the area of distribution and legal regulations concerning the reliability of the powering consumers of electricity is a challenge for systems used for power system protection. This requires continuous improvement of an existing solutions and development of new methods for fast and reliable identification and location of the disturbances an... View full abstract»

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  • DLR-supported distance protection for blackout mitigation

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (815 KB) | HTML iconHTML

    Analyses of the recent decade blackouts has indicated overloads and power swings as being responsible for initiation and development of most large area failures. The overload and power swing conditions have also been found to correspond especially with the over-current and distance protection relays, often causing their over-function under allowable power system operating conditions. It is highly ... View full abstract»

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  • Model and simulation of electric power exchange development in terms of control and system theory

    Publication Year: 2016, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB) | HTML iconHTML

    This work contains selected results of research on metamodeling identification of Polish Power Exchange (Towarowa Giełda Energii Elektrycznej - TGEE) obtained in the MATLAB environment using the System Identification Toolbox (SIT). In order to obtain a type arx parametric model of the system TGEE there was carried out an identification the various periods of the figures for the Day Ahead Ma... View full abstract»

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  • Neural-evolutionary modelling of polish electricity power exchange

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (534 KB) | HTML iconHTML

    The paper contains selected results of studies and research of hybrid modeling which is comprised from neural modeling and evolutionary modeling. Neural modeling was focused on designing and teaching the Artificial Neural Network (ANN) of the Polish Electricity Power Exchange (PEPE) on the example of the data for the period from 01.01.2015 to 06.30.2015 of the Next Day Market, evolutionary modelin... View full abstract»

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  • Features of compensation of a reactive power at the transient mode

    Publication Year: 2016, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB) | HTML iconHTML

    The problem of reactive power compensation in power grids with variable load is analyzed. An inefficient implementation of existing methods of reactive power compensation for this case is shown. The method of analysis of the transmitting energy between the source and the load during the transition process based on the theory of instantaneous power is proposed. The efficiency of energy transfer fro... View full abstract»

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  • The best place for connection of wind power farms to electric power system in point of view of transmission and distribution systems operators

    Publication Year: 2016, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB) | HTML iconHTML

    Wind power farms are mainly situated in area, where there are very good wind conditions. Investors of wind power farms are on the horns of a dilemma how to find the best place for connection of their wind power farms to electric power system. On the other hand there are operators of transmission and distribution systems. The interests of both sides are very often divergent, because the best place ... View full abstract»

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  • Reactive power compensation in a powerful DC drives supply system

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (365 KB) | HTML iconHTML

    Power factor correction of the powerful industrial loads requires a design that is able to compensate for reactive power demand as well as for harmonic currents injected by the equipment into power supply system. In the circumstances many of industrial supply systems consist of a combination of tuned filters and a capacitor bank. The paper presents study results of interaction between capacitor ba... View full abstract»

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  • WLS state estimation in polar and rectangular coordinate systems for power system with phase shifter

    Publication Year: 2016, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (422 KB) | HTML iconHTML

    The paper presents a comparative investigations of the state estimation of a power system with a phase shifting transformer in the polar and rectangular coordinate systems. The estimation with the weighted-least-squares method using the augment matrix approach is considered. During the investigations, one performs of analysis of impact of a coordinate system, in which the state vector is considere... View full abstract»

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