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Wyniki wyszukiwania dla: underground power cables

Wyniki wyszukiwania dla: underground power cables

  • Microbe Power and Diversity: in Health and Society

    Kursy Online
    • S. Raina

  • Optimal linear control theory in power system application

    Publikacja

    Przedstawiono syntezę stabilizatora systemowego przy wykorzystaniu metodyki Hinf. Zaprojektowany regulator umożliwia uzyskanie lepszych rezultatów w porównaniu z regulatorem odniesienia w szerokim zakresie zmian punktu pracy.

  • Dynamic model of nuclear power plant turbine

    The paper presents the dynamic multivariable model of Nuclear Power Plant steam turbine. Nature of the processes occurring in a steam turbine causes a task of modeling it very difficult, especially when this model is intended to be used for on-line optimal process control (model based) over wide range of operating conditions caused by changing power demand. Particular property of developed model is that it enables calculations...

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  • Measurements of no-load and short-circuit parameters of power transformers with taps

    Dane Badawcze
    open access
    • A. Augusiak
    • Z. Myśliwiec
    • F. Panczocha
    • G. Nosinski
    • K. Pela
    • K. Plichta
    • K. Reclaw

    1)    The Laboratory LINTE^2 is a large research infrastructure operated by the Faculty of Electrical and Control Engineering at Gdańsk University of Technology, to be found in Gdańsk, Poland (54.3690 N, 18.6130 E).

  • Security Assessment of a Turbo-Gas Power Plant

    Publikacja

    - Rok 2009

    Critical infrastructures are exposed to new threats due to the large number of vulnerabilities and architectural weaknesses introduced by the extensive use of information and communication technologies. This paper presents the results of an exhaustive security assessment for a turbo-gas power plant.

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  • Modelling and analysis of medium frequency transformers for power converters

    Publikacja

    - Rok 2020

    The evolutions in power systems and electric vehicles, related to the economic opportunities and the environmental issues, bring the need of high power galvanically isolated DC-DC converter. The medium frequency transformer (MFT) is one of its key components, enabled by the increasing switching frequency of modern power semiconductors like silicon carbide transistors or diodes. The increased operating frequency offers small...

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  • Effective Short -term Forecasting of Wind Farms Power

    Publikacja

    - Acta Energetica - Rok 2015

    Forecasting a specific wind farm's generation capacity within a 24 hour perpective requires both a reliable forecast of wind, as well as supporting tools. This tool is a dedicated model of wind farm power. This model should include not only general rules of wind to mechanical energy conversion, but also the farm's specific features. This paper present analytical, statistical, and neuron models of wind farm power. The study is based...

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  • Delivery of Ancillary Services in Distribution Power Systems

    One of the technical and organizational challenges the power system faces in deregulated market conditions is to organize an ancillary services market. The growing share of distributed generation of variable (intermittent) energy sources and a change in the market position of consumers, causes the demand for distributed delivery of ancillary services. For this purpose, it is sought to use the ability of the regulatory measures:...

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  • Selected problems of decision making modelling in power engineering

    The paper presents the selected problems of decision making modelling in power engineering specially investment risk evaluation methods. The proposed model can be used in the range programming the development and investing process in power engineering. Decision making problems in power engineering and the evaluation of investment effectiveness in particular are closely related to modelling which relatively accurately reflects...

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  • CAES – Energy storage providing stability for national power system

    Publikacja

    - Rok 2013

    This paper presents a short characteristics of the power system. It also describes various types of energy storage technologies. The suggested solution of accumulation and generation of electric power is based on the cooperation of gas turbine with Compressed Air Storage Energy systems – CAES. This analysis describes also various types of cooperation of CAES and renewable sources of energy, particularly wind power systems.

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  • Estimation of the Maximum Permissible PV Power to be Connected to the MV Grid

    Publikacja

    - Rok 2023

    In recent decades, a significant increase in the share of renewable energy sources in power grids at various voltage levels has been observed. A number of articles have been published highlighting emerging problems in low-voltage grids with a large share of prosumers and in medium- and high-voltage grids to which photovoltaic (PV) plants are connected. The article analyzes the medium-voltage grid in terms of the possibility of...

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  • Structural Health Monitoring of Overhead Power Transmission Lines

    Publikacja

    - Rok 2013

    Structural Health Monitoring (SHM) is a novel and continuously developing branch of science and technology that draws attention of scientists all over the world. It creates opportunities to detect, localize and identify structural damage of various types such as: line breakage, permissible sag, bolt loosening, fatigue cracking or insulator contamination. On the other hand the methods used to estimate the remaining operational...

  • Uncertainty analysis of measuring system for instantaneous power research

    The paper presents a metrological analysis of the measurement system used for diagnosis of induction motor bearings, based on the analysis of the instantaneous power. This system was implemented as a set of devices with dedicated software installed on a PC. A number of measurements for uncertainty estimation was carried out. The results of the measurements are presented in the paper. The results of the aforementioned analysis helped...

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  • How to choose drive’s rated power in electrified urban transport?

    Publikacja

    Selection of drive's rated power influences not only vehicle's dynamics, but also its energy efficiency. Mentioned above approach requires a multiphysical model, which covers both mechanical and electrical phenomena. This paper discusses how selection of traction drive's rated power influences vehicle energy consumption on example of a trolleybus. A complex mathematical model was developed in Matlab/Simulink to describe the multiphisical...

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  • Interdependence between Power Grids and Communication Networks: A Resilience Perspective

    Publikacja
    • L. Martins
    • R. Girao-Silva
    • L. Jorge
    • A. Gomes
    • F. Musumeci
    • J. Rak

    - Rok 2017

    Power network resilience is increasingly dependent on communication networks. Besides traditional generation, power networks need to accommodate increasingly high penetration levels of dispersed micro generation, mostly based on renewable sources, and increasing and challenging demand, such as electric vehicles. At the same time the deployment of enabling technologies throughout the power grid makes available new demand resources...

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  • Accounting in Power Industry [23/24] Nowy

    Kursy Online
    • W. Stahl
    • M. Jaskólski

  • Accounting in Power Industry (WEiA) [24/25]

    Kursy Online
    • W. Stahl
    • M. Jaskólski

    The course was created for "Energy Technologies" specialization.

  • An application of multi-agent system for ship’s power systems design

    Publikacja

    - Rok 2016

    Design process of transport ship power system consists of structure (topology) and component elements selection. Compliance with the requirements for static components does not guarantee optimal dynamic characteristics of entire power system. Design steps are difficult to formalize and as a consequence to this reason expert and multi-agent systems are used for solving selected design issues. In the paper distributed multi-agent...

  • Measurements of radiation emission of a portable power bank with a capacity of 5200 mAh

    The dataset contains the emission measurement results that are part of comprehensive tests carried out for portable power banks with different capacities. The measurements were performed in the frequency range from 30 MHz to 3 GHz using a Gigahertz Transverse Electromagnetic (GTEM) cell. The test setup was configured to measure a portable power bank...

  • Measurements of radiation emission of a portable power bank with a capacity of 2600 mAh

    The dataset contains the emission measurement results that are part of comprehensive tests carried out for portable power banks with different capacities. The measurements were performed in the frequency range from 30 MHz to 3 GHz using a Gigahertz Transverse Electromagnetic (GTEM) cell. The test setup was configured to measure a portable power bank...

  • Methods for evaluating rated power of diesel-powered generator set

    Basic concepts for evaluating rated power of generator sets powered by combustion engines are presented in this article. A relation between parameters of the engine and the generator are shown. Recommendations contained in the standards and technical literature are systematized. The scheme and methodology for evaluating rated power of the generator set, based on laboratory research, are suggested. Also, the main problems which...

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  • Low-Power WSN System for Honey Bee Monitoring

    Publikacja

    - Rok 2019

    The paper presents a universal low-power system for biosensory data acquisition in scope of bees monitoring. We describe the architecture of the system, energy-saving components as well as we discuss the selection of used sensors. The work focuses on energy optimization in a scope of wireless communication. A custom protocol was implemented, which is the basis for presented energy-efficient devices. Data exchange process during...

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  • Power electronic transformer based on cascaded H-bridge converter

    In this paper the control strategy of power electronic transformer (PET) is proposed. The analyzed structure of PET uses two seven-level cascaded H-bridge (CHB) rectifiers. The electrical power of PET is transferred between DC-links of CHB converters using dual-active-bridges (DABs) and low voltage high frequency transformers. The roposed solution allows for controlling the active and reactive power with a low level of harmonic...

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  • Research of Emergency Modes of Wind Power Plants Using Computer Simulation

    Publikacja
    • M. Z. Qawaqzeh
    • O. Miroshnyk
    • T. Shchur
    • R. Kasner
    • A. Idzikowski
    • W. Kruszelnicka
    • A. Tomporowski
    • P. Bałdowska-Witos
    • J. Flizikowski
    • M. Zawada
    • K. Doerffer

    - ENERGIES - Rok 2021

    The aim of this study is to investigate changes in the wind power plant energy production parameters under the conditions of sudden wind changes and voltage drop. To achieve these goals, a simulation of operation of wind power plants was performed. Twelve wind turbines with variable rotational speed equipped with a Fuhrländer FL 2500/104 asynchronous double-fed induction generator (DFIG) were used, each with an installed capacity...

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  • Utility analysis and rating of energy storages in trolleybus power supply system

    Publikacja

    The article discusses two energy storage applications in power supply system of public electrified transport. The first application aims at reducing the peak power of the traction substation. The second application increases effectiveness of using solar power plant to cover partial power demand of traction supply system. These two applications were discussed and analyzed based on trolleybus supply system in Gdynia, where most measurements...

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  • Performance Evaluation of a 650V E-HEMT GaN Power Switch

    Publikacja

    - Rok 2015

    GaN power switches have better characteristics compared to the state-of-the-art Si power transistors. These devices offer high operating temperature and current densities, fast switching and low on-resistance. However, currently only a few producers offer technology of high voltage GaN transistors. Immaturity of this technology is the reason why experimental evaluation of GaN parameters must be performed to properly exploit their...

  • Measurements of radiation emission of a portable power bank with a capacity of 10400 mAh

    The dataset contains the emission measurement results that are part of comprehensive tests carried out for portable power banks with different capacities. The measurements were performed in the frequency range from 30 MHz to 3 GHz using a Gigahertz Transverse Electromagnetic (GTEM) cell (Fig. 1). The test setup was configured to measure a portable power...

  • Comparative Analysis of Reactive Power Compensation Devices in a Real Electric Substation

    Publikacja
    • H. Tariq
    • S. Czapp
    • S. Tariq
    • K. M. Cheema
    • A. Hussain
    • A. H. Milyani
    • S. Alghamdi
    • Z. M. S. Elbarbary

    - ENERGIES - Rok 2022

    A constant worldwide growing load stress over a power system compelled the practice of a reactive power injection to ensure an efficient power network. For this purpose, multiple technologies exist in the knowledge market out of which this paper emphasizes the usage of the flexible alternating current transmission system (FACTS) and presents a comparative study of the static var compensator (SVC) with the static synchronous compensator...

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  • THE INFLUENCE OF PHASE SHIFTERS ON THE VOLTAGE STABILITY OF CONNECTED POWER SYSTEMS

    Publikacja

    The paper presents the results of simulation tests of connected power systems in which phase shifters were installed on cross-border links. The analysis was carried out in terms of assessing the impact of shifters on node voltage stability. Individual systems were characterized by different balance of active power: deficit or excess. The evaluation of voltage stability was based on the dU/dQ and dU/dP criteria.

  • Issues of Estimating the Maximum Distributed Generation at High Wind Power Participation

    Publikacja

    This paper presents the methods of estimating the maximum power that can be connected to the power system in distributed generation sources. Wind turbine generator systems (WTGS) were selected as the subject for analysis. Nonetheless, the considerations presented in this paper are only general and also apply to other types of power sources, including the sources that are not considered part of distributed generation.

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  • Propagation Characteristics of Partial Discharges in an Oil-Filled Power Transformer

    Publikacja
    • S. M. Kameli
    • S. S. Refaat
    • A. Ghrayeb
    • H. Abu-Rub
    • J. Guziński

    - Rok 2023

    Power transformers are among the most important assets in the power transmission and distribution grid. However, they suffer from degradation and possible faults causing major electrical and financial losses. Partial discharges (PDs) are used to identify the insulation health status and their degradation level. PDs are incipient, low-magnitude faults caused by localized dielectric breakdown. Those activities emit signals in many...

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  • Interline power flow controller - properties and control strategy in dynamic states

    Publikacja

    - Rok 2005

    High-power electronic converter topologies, in such forms as Unified Power Flow Controllers (UPFC), Static Compensators (STATCOM) and Interline Power Flow Controllers (IPFC), have been used to enhance and optimize the use of transmission facilities, under the concept of a flexible ac transmission system (FACTS). In Europe, the anticipated proliferation of distributed-generation (DG) in the near future, driven by governmental initiatives...

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  • Low-power device simulator for micro-energy measurement methods testing

    The paper presents low-power device simulator designed for testing of micro-energy measurement methods. Such kind methods can be used for evaluation of power systems based on Energy Harvesting. The device allows to set the current consumption characteristic over the time, thus making possible playing the role of different types of low-power devices e.g. simulating sensor network node.

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  • Removal of organic compounds from natural underground water in sorption and sono-sorption processes on selected activated carbons

    Publikacja
    • A. Pietrzyk
    • D. Papciak

    - E3S Web of Conferences - Rok 2017

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  • A filter bank solution for active power filter control algorithms

    Publikacja

    - Rok 2003

    Thb paper describes the proposed active power fiIter (APF) with a new control circuit based on an algorithm using ufilter bank and a harmonic predictor. The conirol circuit was realized using the digiiaI signor processor ADSP-21065L and FPGA circuiL In the proposed circuit transient performunee of APF is improved The active power fdter circuil has been built and teste6 and some illustrative, experimental results are uIso presented...

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  • Dedicated power supply subsystem for ultra-low noise preamplifiers

    Publikacja

    In field of electronics there is need for low-noise amplifiers. Noise have the most important influence on analog circuits. Therefore exist necessity to develop new ultra-low noise power supplies, which can cooperate with specified amplifiers and preamplifiers. It is very common that professional power supplies are very expensive and still have disadvantages. This paper proposes simple and inexpensive solution, which fulfill specific...

  • Władza Sądzenia

    Czasopisma

    eISSN: 2300-1690

  • The Possibility to use a Nuclear Power Plant as a Source of Electrical Energy and Heat

    Publikacja

    In this article issues concernig the possibility of nuclear power plant (NPP) operation also as a source of heat, which means combined heat and power production, have been described. CHP work is possible and profitable only in those areas where high thermal power demand occurs, which means near city agglomerations such as Warsaw or the Tri-City. Two levels of thermal power delivered to the heating system have been considered. Preliminary...

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  • Analysis of the Impact of Charging Electric Cars on the Power System Load

    Publikacja

    The paper presents ways of integrating electric cars with the power system. In connection with this, daily load curves in the average working day have been developed in the G2V (Grid-to-Vehicle) and V2G (Vehicle-to-Grid) variants. The G2V solution consists in unidirectional energy flow from the power system to a vehicle’s battery. The V2G solution consists in bi-directional energy exchange between the power system and electric...

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  • Solutions of inverter systems in Shore-to-Ship Power supply systems

    Publikacja

    - Rok 2015

    The article presents a clearly formulated need for installing S2SP (Shore to Ship Power) systems, in particular Medium Voltage (MV) systems, along with certain solutions of modern inverter systems used in those systems. Requirements and basic configurations of S2SP systems are discussed, focusing in particular on capabilities of the S2SP system with DC distribution busbar. Moreover, on the background of the executing assumptions...

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  • Power electronic systems as a crucial part of Smart Grid infrastructure - a survey

    Publikacja

    - Bulletin of the Polish Academy of Sciences-Technical Sciences - Rok 2012

    This article gives a tutorial overview of the most important issues related to the use of power electronic systems in power engineering, with respect to the urgent need for modernization of existing grids in the direction of intelligent networks. The main problems and conditions bound up with the construction of Smart Grids and the location, as well as functioning in them of the most important power electronic systems are presented...

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  • THE PHASE SHIFTERS INFLUENCE ON THE POWER SYSTEM STABILITY

    Publikacja

    The paper presents the effect of phase shifters as FACTS devices on the possibility of improving the angle stability. Presented results obtained by the dynamic simulation performed on the mathematical model of the three machine system cooperating with the 400 kV network. The generative blocks models include turbine models with their controllers and models of synchronous generators with their excitation systems and voltage regulation....

  • Air Power History

    Czasopisma

    ISSN: 1044-016X

  • Journal of Political Power

    Czasopisma

    ISSN: 2158-379X , eISSN: 2158-3803

  • Propulsion and Power Research

    Czasopisma

    ISSN: 2212-540X

  • IET Power Electronics

    Czasopisma

    ISSN: 1755-4535 , eISSN: 1755-4543

  • Power System Technology

    Czasopisma

    ISSN: 1000-3673

  • Wireless Power Transfer

    Czasopisma

    ISSN: 2052-8418

  • Advances in Power Electronics

    Czasopisma

    ISSN: 2090-181X

  • Journal of Power Electronics

    Czasopisma

    ISSN: 1598-2092 , eISSN: 2093-4718