Temat: electric power supply - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Calculation of the Traction Power Supply Systems Using the Functions of Resistance
Obliczanie systemów zasilania trakcji przy użyciu funkcji rezystancji
Autorzy:: Bosiy, D. O.
Kosarev, E. M.
Powiązania:: https://bibliotekanauki.pl/articles/215701.pdf
Data publikacji:: 2015
Wydawca:: Instytut Kolejnictwa
Tematy:: electric traction
electric power supply
instant scheme
calculation
resistance function
feeder currents
voltage losses
power losses
trakcja elektryczna
zasilanie
schematy chwilowe
obliczenia
funkcja oporności
prądy zasilaczy
spadek napięcia
straty mocy
Opis:: The article is devoted to the development of a new method of calculating the instantaneous traction power supply circuits of the system. On the basic of the design scheme of generalized traction substations zone provided analytical functions of the resistance. Using the known functions of the current distribution of functions putted into the concept of resistance feeders traction substations. The functions of resistance and current distribution used in a more straightforward method of calculating the instant schemes that allow to formalize electrical calculations of electrical traction power supply systems.
Artykuł jest poświęcony nowej metodzie obliczania chwilowych schematów układów zasilania systemu trakcji elektrycznej. Na podstawie uogólnionych wyników dla odcinka między podstacjami pokazano zależności analityczne funkcji rezystancji. Z wykorzystaniem znanych funkcji podziału prądów trakcyjnych wprowadzono pojęcie rezystancji zasilaczy podstacji trakcyjnych. Łączne wykorzystywanie funkcji rezystancji i funkcji podziału prądów trakcyjnych pozwala na znaczne uproszczenie metody obliczania chwilowych schematów układów zasilania trakcji elektrycznej. Umożliwia to sformalizowanie obliczeń elektrycznych systemów zasilania trakcji elektrycznej.
Źródło:: Problemy Kolejnictwa; 2015, 168; 7-14
0552-2145
2544-9451
Pojawia się w:: Problemy Kolejnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Telemetric system for track measurement in rails vehicles without electric power supply
Autorzy:: Hejczyk, T.
Powiązania:: https://bibliotekanauki.pl/articles/393800.pdf
Data publikacji:: 2011
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Tematy:: zestaw kołowy
osie
wagony
diagnostyka
przebieg
temperatura łożyska
brak zasilania elektrycznego
licznik kilometrów
telemetria
wheel set
axles
wagons
diagnostics
mileage
bearing temperature
lack of electric power supply
odometer
telemetry
Opis:: The article presents review of methods and devices for track measurement of rail vehicles in aspect of diagnostics and safety of use. Currently used solutions do not enable effective "on-line" measurement of mileage by wheelsets and vehicles' axles in rail vehicles without electric power supply such as goods wagons and cisterns. Those solutions have limited functionality and have to use additional power supply (accumulators, generators, etc.) which significantly increase exploitation costs. A telemetric system for monitoring of wheelsets' mileage as well as of their bearing temperature, based on original solution of odometer installed on the set's grease-box, was suggested in the research. The odometer is powered from an independent source of energy generated through magnetic induction by coil and neodymium magnets. Reading of collected data is done with the help of a PDA equipped with an RFID reader as well as wired and wireless interfaces for data transmission to telemetric system and GPS.
Źródło:: Archives of Transport System Telematics; 2011, 4, 4; 11-16
1899-8208
Pojawia się w:: Archives of Transport System Telematics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Energy Router for Emergency Energy Supply in Urban Cities: A Review
Autorzy:: Nie, Yu
Xu, Hui
Hu, Yihua
Ye, Xianming
Powiązania:: https://bibliotekanauki.pl/articles/2175929.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: emergency electric power source
emergency power supply method
energy router
Opis:: The current emergency power supply (EPS) measures are not perfect and standardised in response to large-scale power failures, such as city-wide ones. This review paper focuses on reasonably using the emergency electric power source to supply power in case of an abnormal urban power grid, to ensure the regular operation of urban electrical equipment and the daily life of the people. This study first introduces the different kinds of main emergency electric power sources and analyses their advantages and disadvantages. The battery of an electric vehicle as a new potential emergency power source is introduced that can also avoid the loss caused by unexpected power failure. Finally, three different EPS methods are explained in detail for different emergency occasions. Among them, the energy router is reviewed comprehensively considering it is the most potential emergency power distribution approach in the future because of its various applications.
Źródło:: Power Electronics and Drives; 2022, 7, 42; 246--266
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Increasing power supply safety in the aspect of supporting the renewable energy sources by conventional and virtual power stores
Autorzy:: Jakowski, D.
Dzida, M.
Powiązania:: https://bibliotekanauki.pl/articles/259988.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: OZE
power market
energy stores
DSR
power supply safety
electric power system
mangement of electric power demand
Opis:: 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 energy stores may significantly influence power supply safety by assuring continuity of electric power supply at an acceptable price. Involvement of electric power consumers ( DSR ) should be one of the basic solutions for power markets in Poland and Europe.
Źródło:: Polish Maritime Research; 2018, S 1; 189-197
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Are we ready for electric cars?
Autorzy:: Karczewski, Mirosław
Szczęch, Leszek
Polak, Filip
Powiązania:: https://bibliotekanauki.pl/articles/242153.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: electric car
car battery charger
power supply
electricity production
Opis:: Are we ready for electric cars?
Źródło:: Journal of KONES; 2019, 26, 3; 69-74
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Modeling of the controlled traction power supply system in the space-time coordinates
Autorzy:: Bosyi, D.
Kosariev, Y.
Powiązania:: https://bibliotekanauki.pl/articles/375339.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: electric traction
power supply
controlling
modeling
space-time
voltage stabilization
Opis:: The problems of the traction power supply system calculation are considered in the article. The authors proposed the space-time model, which is based on the analytical functions of the current- and voltage-drop distributions in the contact network. The usage of the proposed model is shown for the control law calculation both to stabilize the voltage at the pantographs of the electric rolling stocks and to reduce the power losses.
Źródło:: Transport Problems; 2017, 12, 3; 5-19
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: „Shore to ship” system - an alternative electric power supply in port
Autorzy:: Borkowski, T.
Tarnapowicz, D.
Powiązania:: https://bibliotekanauki.pl/articles/246496.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: alternative marine power
electric shore-side supply
auxiliary diesel engine
exhaust emission
Opis:: Greater interdependence and integration among the countries worldwide have resulted in the growth of the world trade and, what follows, marine transportation. In the last few years, despite the world economic stagnation, the number of ships has increased. An increase in the marine transportation means greater air pollution caused by ships, what is of paramount importance for the port cities. One of the efficient ways of limiting the negative impact of ships lying in ports on the environment is the power supply from the local electricity stations. This will allow for turning marine power generating systems off, what will result in the emission elimination in the ship’s mooring time along with the decrease of noise and vibrations. The infrastructure of the port electric installation necessary for the ships’ supply has to be designed so as to make the operating of different ship types possible. It is complicated as all over the world ships are equipped with different electric systems. The paper deals with general issues related to common nominal voltages and frequencies for vessels which call in European harbours and their estimated power demands. Additionally, a case study of a ferry vessel, currently undergoing retrofitting for shore connections, is presented and some particulars concerning technical solutions and environmental profits are described.
Źródło:: Journal of KONES; 2012, 19, 3; 49-58
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Electrical Power Infrastructure for Modern Rolling Stock with Regard to the Railway in Poland
Autorzy:: Szeląg, A.
Powiązania:: https://bibliotekanauki.pl/articles/224016.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: electric train
power supply system
TSI criteria
pociągi elektryczne
system zasilania
kryteria TSI
Opis:: Implementing high-speed trains on Polish railway lines requires a new approach to the issue of power and energy supply via a 3 kV DC power system. Due to the control systems used, modern rolling stock equipped with asynchronous drive allows maintaining a set speed, as far as a locomotive’s power and voltage in a catenary allow it. Characteristics of traction vehicles with asynchronous drives enables run at voltage lower than the rated voltage, however, it entails decrease of consumed power (required for locomotives with power above 2 MW) and loss of motion dynamics. Modernisation of a railway power supply system conducted in Poland since the mid-1990s of the 20th century has intensified in the past couple of years (so-called MUZ-I program) due to the purchase of Pendolino trains, and it primarily include the main lines. A number of modernisation investments (lines E65, E20, E30) are implemented with co-financing from the EU funds. Due to the predicted trains’ speed (200 km/h and above), in order to fulfill the requirements specified in TSI, a power supply system on these lines should ensure achieving high parameters, that is supply of trains with current up to 3.2 kA, while the so-called mean useful voltage should not be lower than 2.8 kV. The article presents solutions introduced on Polish railway and aiming at adjusting the power supply used to the TSI requirements. The range of conducted modernisation works allows for conclusion that the process is in fact a re-electrification of railway power supply systems.
Źródło:: Archives of Transport; 2017, 42, 2; 75-83
0866-9546
2300-8830
Pojawia się w:: Archives of Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Researches on power transmission systems of traction vehicles with a hybrid drive
Autorzy:: Kozłowski, M.
Plich, M.
Powiązania:: https://bibliotekanauki.pl/articles/244193.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
hybrid drive vehicles
unconventional power supply sources
electric machines
energy accumulators -super capacitors
Opis:: The structures of modern traction vehicles are based on new generation devices. Technical progress within the field of power transmission concerns such elements as sources of power supply, electric devices and energy electronic solutions in power transmission systems. The prototypes of traction vehicles being currently drawn up are hybrid vehicles using different kinds of sources of power supply ofpower transmission systems, the most important of which are combustion engines, contact systems, supercapacitors (ultracapacitors), accumulators and fuel cells. Main engines are usually electric machines. In energy electronic starting systems it is permissible to use all kinds of main electric engines, for example, direct-current motors (inline engines, commutator motors with permanent magnets or non-commutator motors) or three-phase motors of alternating current (induction and synchronous). This means a complete change of rules in energy managing in a vehicle. Sources of energy can have the function of basic power supply (contact system, combustion engine or combustion cell) or the function of power supply support (supercapacitors, accumulators or fuel cell). New functions of drive operation will be available, namely, leveling of basic power supply load, recuperation of braking energy of the whole train set, driving at the temporary disconnection of basic power supply (short-term application of accumulator as basic power supply). Each of the above functions can contribute to the improvement of watt-hour efficiency of the system or to prolonging the range of driving. Therefore, it is necessary to undertake research on new generation power transmission systems. Research tasks focus on measurement of state variables of a drive, analyses of traction signals, modeling of drive operation in the conditions of driving cycle realization, verification of a model, drawing up a strategy of energy management in order to achieve the best watt-hour efficiency and the range of driving. In the article presented, sample results of researches on applications of hybrid power transmission systems conducted in various national research centers will be demonstrated. They concern both theoretical research (model simulation) and prototype research. The conception will be presented of a laboratory station for conducting research on modern sources of power supply and drives, which is currently being built at the Faculty of Transport of Warsaw Polytechnic at the Division of Exploitation of Tracking Systems and Electric Equipment in Transport.
Źródło:: Journal of KONES; 2008, 15, 2; 233-238
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Estimation of efficiency of electric power balance iautomobiles
Autorzy:: Puzakov, Andrey
Powiązania:: https://bibliotekanauki.pl/articles/2098141.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: power supply system of vehicles
battery
automotive alternator
electric power balance
system zasilania pojazdów
akumulator
alternator samochodowy
bilans mocy elektrycznej
Opis:: Increase in consumer power with the simultaneous reduction in the time and driving speed of personal automobiles results in systematic discharge of the batteries due to electric power balance inefficiency. The calculation methods for the evaluation of the electric power balance are inefficient, as a number of random factors (demand for electric power, driving speed, air temperature, technical condition of the units, etc.) influence the process of electric power generation, storage and consumption. The instrumental method for evaluation of the electric power balance efficiency assumes that the driver is informed about the battery charge condition prior to combustion engine startup, operational evaluation of the charge state change is performed during automobile driving and the driver is warned about critical reduction of charge state (including the forecast of its change for the period of the parking of the automobile in winter).
Źródło:: Transport Problems; 2021, 16, 2; 113--120
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Distribution of Excess Regenerative Energy in Electric Transport Systems on the Basis of Fuzzy Logic Application
Autorzy:: Sablin, O.
Kuznetsov, V.
Shinkarenko, V.
Ivanov, A.
Powiązania:: https://bibliotekanauki.pl/articles/223524.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: electric transport
regeneration of the electric power
stores
inverters
regulation of voltage
traction
external power supply
fuzzy logic
transport elektryczny
regeneracja energii elektrycznej
magazyny
falowniki
regulacja napięcia
trakcja
zasilanie zewnętrzne
logika rozmyta
Opis:: Purpose. To develop the fuzzy model of distribution of excess regenerative energy in traction and external power supply systems allowing to exercise effective operation of the power equipment. Relevance. For effective distribution of excess regenerative energy in systems of electric transport, as well as for systems equipped with stationary stores of energy and inverting traction substations with regulators of output voltage it is necessary to solve a number of the problems with high degree of uncertainty demanding taking into account a set of random factors such as the modes of power lines and traction loadings. These factors have to be considered in operation for choosing the rational modes of energy stores, inverters and regulators of voltage on buses of substations to provide the rational conditions for energy regeneration on electric transport. Scientific novelty. The control system of energy storage devices, inverters and traction substation output voltage regulators, designed on the basis of fuzzy logic, can provide the necessary conditions for the regeneration on electric transport on sections with a shortage of traction power consumption and allows to optimize the distribution of excess braking energy of transport vehicles. It is achieved by determining the rational relationship between the components of the excess current of regeneration in real time, which can ensure a minimum of power losses of regenerative energy in traction and external power supply systems. Practical importance. The use of the developed approach is effective under the conditions of incomplete information received by measurement systems and on the basis of additional studies it can allow to minimize rated capacity of stores, inverters and traction substation output voltage regulators that could reduce the costs of modernization of existing sections and electrification of new electric transport systems.
Źródło:: Archives of Transport; 2017, 42, 2; 53-63
0866-9546
2300-8830
Pojawia się w:: Archives of Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Intelligent technologies for efficient power supply in transport systems
Autorzy:: Bosyi, D.
Powiązania:: https://bibliotekanauki.pl/articles/375134.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: electric transport
energy efficiency
traction power supply
intellectual control
energy recovery
electric vehicles
interoperability
transport elektryczny
efektywność energetyczna
zasilanie trakcji
sterowanie inteligentne
odzyskiwanie energii
pojazdy elektryczne
współdziałanie
Opis:: The main directions of development of the energy-saving technologies in electrified transport systems are considered in the article with taking into account the flexible regulating features of modern power equipment. The proposed theory and principles of functioning allow understanding the optimal control laws for converters, accumulators, and renewable energy sources in their integration into traction power supply systems. Research opens the possibility of the installed power of the required equipment in minimizing and reducing the capital costs for energy-saving technologies. Also, combination of all developed approaches will provide the system effect.
Źródło:: Transport Problems; 2017, T. 12, z. spec.; 57-70
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Preventing the development of emergency modes of interlocked electric drives of a rolling mill under the impact loads
Autorzy:: Druzhinin, Valeriy
Sivyakova, Galina
Kalinin, Alexey
Tytiuk, Valerii
Nikolenko, Anatolii
Kuznetsov, Vitaliy Vadimovich
Kuzmenko, Mykhailo
Powiązania:: https://bibliotekanauki.pl/articles/2174475.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: power supply network
voltage drops
electric drive
hot rolling mill
mathematical modeling
simulation modeling
sieć zasilająca
spadki napięcia
napęd elektryczny
modelowanie matematyczne
modelowanie symulacyjne
Opis:: In recent years, due to the tightening of competition in the global market of steel producers, the requirements for the quality of hot-rolled steel have increased. The finishing group of the rolling mill is characterized by a complex structure of mechanical and electrical parts. The operation of electric drive systems of such units is characterized by the interrelation of electromagnetic processes, mechanical phenomena and technological factors. As experimental studies have shown, the quality of the supply voltage is inextricably linked with the impact nature of the loads in the rolling stands of the roughing and finishing groups of the hot rolling mill. A decrease in the supply voltage may be accompanied by the development of emergency modes of synchronous electric drives, leading to a decrease in the quality of the finished product.The paper developed a mathematical model of the power supply system of the rolling mill JSC "ArcelorMittal Temirtau". It is shown that this can lead to loss of synchronism of the synchronous motor. Such a voltage drop has a significant impact on the operation of DC electric drives of the finishing group. Various strategies are proposed to counter the development of emergency situations.
Źródło:: Diagnostyka; 2023, 24, 1; art. no. 2023105
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Reserves for Improving the Energy Efficiency of Traction Power Systems
Rezerwy poprawienia wydajności energetycznej systemów zasilania trakcyjnego
Autorzy:: Hubskyi, P. V.
Powiązania:: https://bibliotekanauki.pl/articles/215585.pdf
Data publikacji:: 2018
Wydawca:: Instytut Kolejnictwa
Tematy:: energy efficiency
energy efficiency indicators
energy-saving
electric traction
electrified railways
DC current
distributed power supply
wydajność energetyczna
wskaźniki wydajności
energooszczędność
trakcja elektryczna
koleje zelektryfikowane
prąd stały
rozproszone zasilanie
Opis:: In the article, trends in the electric power industry were analyzed, namely, constant growth in energy resources and the need to improve energy efficiency, the introduction of energy saving measures. Some methods of improving efficiency in the railway transport industry are considered.
W artykule zanalizowano trendy w przemyśle elektroenergetycznym, tzn. ciągły wzrost zasobów energetycznych i konieczność poprawienia wydajności energetycznej przez wprowadzenie energooszczędnych środków. Rozważono również niektóre metody poprawy wydajności transportu kolejowego.
Źródło:: Problemy Kolejnictwa; 2018, 178; 7-11
0552-2145
2544-9451
Pojawia się w:: Problemy Kolejnictwa
Dostawca treści:: Biblioteka Nauki

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