Temat: power - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Control circuit for series active power filters based on programmable logic devices
Autorzy:: Supronowicz, H.
Olszewski, A.
Gawiński, H.
Tematy:: power electronics
active power filter
power quality; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/262739.pdf Link otwiera się w nowym oknie
Opis:: This paper describes a control circuit for the active power filters working with three-phase AC power line. It describes logic circuitries as well as laboratory test results. The control circuit was realized with programmable logic devices, fast analog-to-digital and digital-to-analog converters. Proposed system working with open-loop control, it allows significantly simplifying its logic structure. Programmable logic devices do simultaneously a few independent tasks, so a control algorithm can be performing fast, improving considerably compensation dynamic. This paper includes results of laboratory tests of the active power filter consisted of proposed control circuit and a voltage-source converter.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Active parallel compensation using a power supply with a tunable inductive filter
Autorzy:: Ciepliński, Łukasz
Gulczyński, Adam
Tematy:: power factor correction
power quality
power supply
reactive power
shunt active power filters; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59111811.pdf Link otwiera się w nowym oknie
Opis:: Increasing numbers of devices of various types are now connected to power lines. Their nonlinear nature harms the operation of the lines, as the line voltage is distorted from a sine wave, which causes disturbances in the operation of other loads. This study proposes a method of active parallel compensation that can be realised using a power supply. The proposed device is a dual-function system: it supplies the load connected to its DC link, and operates as a parallel active filter. This kind of device, with a relatively low value of the rated output power, could be implemented in electrical systems to provide distributed compensation. The second novel aspect of this work is the use of a tunable inductive filter, which is included at the input of the power electronics controlled current source and forms a main part of the power supply. The use of this tunable inductive filter increases the frequency response of the current source, while at the same time, in the quasi-steady state of power supply operation, the pulse modulation component of the input current source remains at a minimum level. This paper discusses the structure of an electrical system with the proposed power supply and the rules of operation for the system, and presents test results based on both a simulation and a laboratory model of the system.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Sharp power – introduction to the issue
Autorzy:: Skoneczny, Łukasz
Cacko, Bogusław
Tematy:: state power
sharp power
soft power
hard power
smart power
information
warfare
hybrid conflict; Pokaż więcej
Wydawca:: Agencja Bezpieczeństwa Wewnętrznego
Powiązania:: https://bibliotekanauki.pl/articles/1892078.pdf Link otwiera się w nowym oknie
Opis:: The aim of the article is an attempt to define the sharp power strategy, present characteristic ways of its employment and propose methods of minimizing its negative consequences for the security of the Republic of Poland. The analysis of the issues related to the types of state power (soft power, hard power, smart power) is followed by a coherent definition of sharp power formulated by the authors of the publication. The consecutive section of the article describes examples of methods of implementing the aforementioned strategy of influencing participants of international relations. Finally, the authors presented proposals for institutional and legal solutions, which are to counteract potential sharp power moves aimed at undermining the security and international position of the Republic of Poland.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Sampled Method of Active Power Filter Control. Part II
Autorzy:: Szromba, A.
Tematy:: shunt active power filter
power factor
power quality; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/262604.pdf Link otwiera się w nowym oknie
Opis:: The aim of the paper is to demonstrate how to use sampled method of control of a shunt active power filter to maintain invariable power of a supplying voltage source, even though the supplied load varies randomly. The definition by S. Fryze of load current components is used as a basis for the construction of a family of shunt active power filters. The distinctive property of these filters is maintaining non-deformed source current in every one individually considered period T. The main features of the family of filters are described in the first part of the paper, which is devoted to DC circuit. In the second part, the results are implemented to a single- and a three-phase circuit. Additionally, some new features, which may be applied only for AC circuit, are discussed in the second part. All the presented waveforms are obtained using computer simulation tools.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Sampled method of active power filter control. Part 1
Autorzy:: Szromba, A.
Tematy:: shunt active power filter
power factor
power quality; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/262771.pdf Link otwiera się w nowym oknie
Opis:: The aim of the paper is to demonstrate how to use sampled method of control of a shunt active power filter to maintain invariable power of a supplying voltage source, even though the supplied load varies randomly. The definition by S. Fryze of load current components is used as a basis for the construction of a family of shunt active power filters. The under discussion family of filters is designed to work synchronically with a time period T. The period T may be regulated in some range. The distinctive property of these filters is maintaining non-deformed source current in every one individually considered period T. Main features of the family of filters are described in the first part of the paper, which is devoted to DC circuit. Then in the second part, the results, which are obtained in DC circuit, are implemented to a single- and then to a three-phase circuit. Additionally, some new features, which may be applied only for AC circuit, are discussed in the second part. All the presented waveforms are obtained using computer simulation tools.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Toward The Three–Level Power Distance Concept: Expanding Geert Hofstede’s Power Distance Beyond Cross–Cultural Context
Autorzy:: Stępień, Mateusz
Dudek, Michał
Tematy:: power
power distance
Hofstede; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2076777.pdf Link otwiera się w nowym oknie
Opis:: Power distance is one of the most researched dimensions of culture in Geert Hofstede’s framework. The vast majority of scholars refer to power distance as though it were something self-evident. Despite the hundreds of studies conducted on the basis of power distance, to date no one has seriously tried to propose a reconceptualization of power distance. Against that background, this paper aims to redefine Hofstede’s concept of power distance. It focuses on formulating a sketch of the three-level concept of power distance that essentially refers to Hofstedian tradition, but is at the same time entangled in different ontological and epistemological assumptions on the social world. The proposed way of understanding power distance creates space for, among other things, a more interaction- focused study on power dynamics in various settings. It also provides the possibility of formulating completely new hypotheses concerning psychological and sociological dimensions of exercising power.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Legitimisation of power in Poland
Autorzy:: Mistygacz, Michał
Słomka, Tomasz
Tematy:: power
legitimacy of power
constitution
crisis of democracy
legislative power
executive power
judicial power; Pokaż więcej
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:: https://bibliotekanauki.pl/articles/60975935.pdf Link otwiera się w nowym oknie
Opis:: The article concerns the dilemmas of legitimising power in Poland, based both on the contemporary achievements of theoreticians and on a discussion of the realities of the political system in Poland. The analysis focuses on the assumption that, on the one hand, the legitimation of power is its recognition as legal, operating on the basis of applicable legal norms, and on the other, the recognition that a specific power has social grounds for having the rule. The legitimacy of power in Poland is based on the authoritarian experiences before 1989, the democratic transformation, and the crisis of constitutional democracy after 2015. The discussion is based on a reference to Montesquieu’s division of powers and an analysis of the legitimacy of the legislature, the executive, and the judiciary.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Specific features and models of electric power consumption by household - type consumers
Autorzy:: Frąckowiak, R.
Gałan, T.
Tematy:: electric power consumption
power consumption
power network
electrical energy; Pokaż więcej
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Powiązania:: https://bibliotekanauki.pl/articles/97403.pdf Link otwiera się w nowym oknie
Opis:: In the paper, the results of analysis of the load curves for the household - type consumers fed from the LV electric power network are presented. In the study, the influence of the sunset time and ambient temperature on the electric load curves has been assessed and, consequently, the specific features of the graphs for the allocated consumer groups have been defined. Also, suitable models considering the impact of the observed factors on the electrical energy consumption have been developed. Energy consumption in the tariff zones by the consumers settled according to G12 tariff has been of special interest.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: One phase active filter with energy storage for active power surge compensation in feed line
Autorzy:: Sowa, K.
Baszyński, M.
Piróg, S.
Tematy:: power quality
active power filter
power surge compensation; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/141248.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a concept of an active filter with energy storage. This solution can be used for the compensation of momentary one phase high power loads with discontinued power consumption (e.g. spot welding machines). Apart from the typical filtering capabilities, the system’s task is also the continuity of the input power from the feeder line and limiting its fluctuation. The proposed by the author’s solution can produce measurable economic benefits by reducing the rated power necessary to energize periodically operating loads and improving the indicators of electrical energy quality. The developed method of active power surges compensation enables a flexible approach to requirements concerning the rated power of the point to which the periodically operating loads with high peak current value are connected. The tests were conducted on a simulation model specially developed in Matlab & Simulink environment, proving high effectiveness of the presented solution.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: The use of the SSC as reactive power compensator
Autorzy:: Delfino, F.
Procopio, R.
Tematy:: power quality
custom power
DC-AC power conversion
reactive power
Static Series Kompensator (SSC); Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/262564.pdf Link otwiera się w nowym oknie
Opis:: The paper deals with the possibility of employing the Custom Power Static Series Compensator (SSC), whose primary aim is to compensate voltage sags, also as a Reactive Power Compensator. The idea arises from the observation that such device does not work for the majority of time and can therefore be usefully employed for other purposes, such as power factor corrections. To this aim, an "ad hoc" control algorithm is developed and thoroughly discussed in the paper. The effectiveness of such control scheme is then tested by applying the SSC to a load represented by an induction motor in order to improve its power factor. The whole system is modelled with the aid of the electromagnetic code PSCAD -EM TDC, which allows to describe with high detail all its components. The results of the simulations show the good response of the device, which enables to rapidly increase the power factor of the motor and maintains the Total Harmonic Distortion (THD ) of the injected phase voltages under the threshold value of 8%, as prescribed by CEI EN 50160 3.11.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "power" wg kryterium: Temat