Wyniki wyszukiwania dla: UNINTERRUPTIBLE POWER SUPPLY

• The investment process in the power supply industry

  Publikacja

  • W. Kamrat

  - Rynek Energii - Rok 2012

  The basis for power supply industry programming in a market economy should be the principle of sustainable development, which must take into account maintaining an adequate level of energy security on the one hand, and the aim to preserve the maximum degree of non-renewable resources on the other hand. Therefore, the overriding aim should be a strive to meet the current and prospective demand for energy and fuel, in conjugation...

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• The measurement of input power of power supply in network disturbed by low frequency distortions

  Publikacja

  • S. Galla
  • A. Szewczyk

  - Przegląd Elektrotechniczny - Rok 2016

  In the paper authors present results of observation of input power changes versus harmonics amplitude in supply voltage of low-power power supply device. In the study, the electrical measurements supported with thermal imaging were used. The input circuit elements of studied device responsible for input power increase are pointed

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• Hydraulic servomechanism system. Examples of reduction of power losses in the variable pressure power supply

  Publikacja

  • Z. Paszota

  - Rok 2007

  Układ serwomechanizmu hydraulicznego najczęściej stosowany, w którym rozdzielacz dławiący jest zasilany pompą wyporową o stałej wydajności, współpracującą z zaworem przelewowym, pracujący przy stałym ciśnieniu zasilania, osiąga wysoką wartość sprawności energetycznej jedynie w punkcie maksymalnej wartości obciążenia i prędkości sterowanego silnika. Oszczędności energii przy zasilaniu układu pompą o stałej wydajności mogą być osiągnięte...

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

  Publikacja

  • R. Strzelecki
  • P. Mysiak
  • T. Sak

  - 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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• Dedicated power supply subsystem for ultra-low noise preamplifiers

  Publikacja

  • K. Karpienko
  • Ł. Surażyński
  • P. Wierzba

  - Rok 2013

  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...

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

  Publikacja

  • R. Strzelecki
  • P. Mysiak
  • T. Sak

  - Rok 2015

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• INCREASING POWER SUPPLY SAFETY IN THE ASPECT OF SUPPORTING THE RENEWABLE ENERGY SOURCES BY CONVENTIONAL AND VIRTUAL POWER STORES

  Publikacja

  • D. Jakowski
  • M. Dzida

  - Polish Maritime Research - Rok 2018

  This paper presents characteristics and purposefulness of supporting the renewable energy sources (OZE) by means of energy stores. The main emphasis was placed on analysis of virtual energy stores available for implementation in Polish economy conditions. A role which management of Demand Side Response (DSR) may play in balancing Polish electric power system, is discussed. Implementation of such solutions together with conventional...

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• Start-up of a power unit of a thermal power plant auxiliary systems with supply from a hydropower plant

  Publikacja

  • J. Klucznik
  • Z. Lubośny
  • K. Dobrzyński

  - Acta Energetica - Rok 2013

  This article discusses the issues related to a power unit of a thermal power plant start-up with the use of a hydropower plant. Hydropower plant can supply and will enable start-up of auxiliary equipment in a power unit of a thermal power plant. Due to high capacity of auxiliary drives, start-up of auxiliaries in a thermal power plant after blackout (and boiler shutdown) is not possible from emergency energy sources in the power...

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

  Publikacja

  • M. Bartłomiejczyk
  • L. Jarzębowicz

  - Rok 2020

  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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• SMART GRID TECHNOLOGIES IN ELECTRIC POWER SUPPLY SYSTEMS OF PUBLIC TRANSPORT

  Publikacja

  • M. Bartłomiejczyk

  - Transport - Rok 2018

  Nowadays the issue of electric energy saving in public transport is becoming a key area of interest which is connected both with a growth in environmental awareness of the society and an increase in the prices of fuel and electricity. It can be achieved by improving the usage of regenerative breaking. In 2016 the Przedsiębiorstwo Komunikacji Trolejbusowej (PKT, Trolleybus Transport Company) in Gdynia began practical implementation...

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