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1
Content available Efficiency of energy storage control in the electric transport systems
Sablin Oleg, Bosyi Dmytro, Kuznetsov Valeriy, Lewczuk Konrad, Kebal Ivan, Myamlin Sergiy S.
Archives of Transport
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2022
|
Vol. 62, iss. 2
105--122
EN
The problems of storage and supplying the energy, together with reducing energy intensity for transport, are now crucial for developing sustainable and reliable transport systems. The energy network must be gradually adapted to new loads and power consumption patterns, especially in railways. The article aims to develop the simulation model to investigate the energy storage systems in its use in the electric transport infrastructure. The authors review selected technical solutions for electric energy storage in transport. The theoretical aspects of energy exchange in the energy storage systems were presented as a base for a continuous simulation model of electric transport power supply. In the non-periodic random voltage input applied to the storage unit, it is proposed to use the calculation method based on the Duamel integral to analyze its charge-discharge processes. The resistance functions were applied to analyze the traction power supply mode with variable in time and space by active loads. The simulation showed that the direct connection of the unit to the traction network significantly reduces the traction energy consumption.
2
Content available Dynamic rating method of traction network based on wind speed prediction
Su Zhaoux, Tian Mingxing, Sun Lijun, Zhang Ruopeng
Archives of Electrical Engineering
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2022
|
Vol. 71, nr 2
379--395
EN
The operating temperature of the transmission line in the traction network is affected by geographical and climatic factors, especially the wind speed. To make better use of the thermal stability transmission capacity of the traction power supply system in improving the short-term emergency transmission capacity, the dynamic rating technology is introduced into the traction power supply system. According to the time-varying characteristics of the actual wind speed, a dynamic rating method of the traction network based on wind speed prediction is proposed and constructed. Based on the time series model in predicting the wind speed series along the corridor of the traction network, the temperature curve of each transmission line under different currents is calculated by combining it with the heat balance equation of an IEEE-738 capacity expansion model, thus the relationship between the peak operating temperature and current of each transmission line in the prediction period is obtained. According to the current distribution coefficient, the capacity increase limit of the traction network is determined. The example shows that the proposed dynamic rating method based on wind speed prediction is an effective method to predict the short-term safe capacity increase limit of the traction network, which can increase the comprehensive capacity of the traction network by about 45% in the next six hours, and the capacity increase effect is obvious, which can provide reference and technical support for short-term emergency dispatching of traction power supply dispatching centres.
3
Content available Traction power supply with three paralleled single phase voltage source inverters
Płatek Tadeusz, Osypinski Tomasz, Chłodnicki Zdziaław
Bulletin of the Polish Academy of Sciences. Technical Sciences
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2021
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Vol. 69, nr 2
art. no. e136733
EN
Installation and operation of rail vehicles powered by multiple system voltages forces the construction of multi-system traction substation. The article describes a traction substation power supply with 15 kV output voltage and frequency Hz and 25 kV at 50 Hz. The topology of the power electronics system and the control structure of the power supply enables parallel connection of several power supplies. The selected topology and control structure ensures minimizing the rms value of the LCRL filter capacitor current used at the output of the inverters. The article analyses the influence of harmonics consumed by the active front end (AFE) rectifier used in traction vehicles on the rms current of the LCRL filter capacitor.
4
Content available remote Od tramwaju do elektromobilności – 140 lat rozwoju i 100 lat nauczania trakcji elektrycznej w Politechnice Warszawskiej
Szeląg Adam, Lewandowski Mirosław, Maciołek Tadeusz
Przegląd Elektrotechniczny
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2020
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R. 96, nr 11
213--224
PL
W artykule przedstawiono historię a także perspektywy rozwojowe współczesnej trakcji elektrycznej. Przedstawiono stan obecny i możliwości oraz prognozy dla transportu zelektryfikowanego ze szczególnym uwzględnieniem polityki elektromobilności w Polsce i świecie. W związku ze stuleciem nauczania trakcji elektrycznej w Politechnice Warszawskiej omówiono wkład Wydziału Elektrycznego w kształcenie oraz badania naukowe i wdrożenia z zakresu trakcji elektrycznej.
EN
The article presents history and perspectives of development modern electric traction. Current state and opportunities and prognosis for electrified transport taking into account electromobility policy in Poland and the World is discussed. Due to 100 anniversary of didactic of electric traction at Warsaw University of Technology role of Electrical Engineering Faculty in teaching and research on electric traction is presented.
5
Content available Interoperacyjność kolei – bariera czy szansa dla kolei w Polsce
Pawlik M.
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
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2018
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Nr 2(116)
119--133
PL
Rozszerzenie Unii Europejskiej w 2004 roku w istotny sposób wpłynęło zarówno na aspekty prawne jak i aspekty techniczne funkcjonowania w Polsce transportu kolejowego. Wpływ ten najczęściej nie jest w pełni dostrzegany. Artykuł przedstawia wspomniane obszary prawne i techniczne w kontekście wdrażanej w Unii Europejskiej interoperacyjności kolei. Wskazane są zarówno zasadnicze zmiany w transporcie kolejowym, które wprowadzono w związku z wejściem Polski do Unii Europejskiej oraz zakres prac realizowanych dla potrzeb pełnego wdrożenia interoperacyjności jak i związane z nimi wyzwania. Artykuł formułuje i uzasadnia odpowiedź na tytułowe pytanie – czy narzucona poprzez legislację interoperacyjność kolei stanowi barierę czy szansę dla kolei w Polsce.
EN
European Union enlargement in 2004 significantly affected legal and technical aspects of the railway transport functioning in Poland. This influence is however usually not fully understood. Mentioned legal and technical areas in the context of introducing European railway interoperability are presented in the article. Both main railway related changes associated with EU enlargement as well as the scope of works which are leading towards full railway interoperability implementation together with their associated challenges are pointed. Paper states and justifies an answer for the title question – whether legally forced railway interoperability forms an obstacle or rather a chance for railway in Poland.
6
Content available Intelligent technologies for efficient power supply in transport systems
Bosyi D.
Transport Problems
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2017
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T. 12, z. spec.
57--70
EN
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.
7
Content available Analyse of the challenges for safe transition from individual intraoperable railway systems to the single European interoperable railway system
Pawlik M.
Archives of Civil Engineering
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2016
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Vol. 62, nr 4/II
169--180
EN
Due to different reasons a significant modal shift from railway to road transport took place over last decades. The basic reasons are pointed in the paper introduction together with contradicting transport policy taking into account environmental and economical challenges. Political vision to stimulate modal shift from road and air to railway cannot become true without achieving railway technical and operational interoperability. Paper describes wide range of technical barriers between individual intraoperable railway systems in civil engineering structures, traction power supply, control command and signalling and the ways, which are being applied to ensure stepwise converging of the technical solutions taking into account safety and technical compatibility, as well as other essential requirements, namely: reliability, accessibility, health and environment.
PL
Europejska polityka transportowa od dwudziestu już lat zakłada secesję kolei jako ekonomicznie i środowiskowo cennego środka transportu. Tak się jednak nie dzieje, więc pytanie o przyczyny jest jak najbardziej zasadne. Artykuł wychodzi od powodów i uwarunkowań szybkiego rozwoju kolei w pierwszej połowie dwudziestego wieku by pokazać praprzyczyny dzisiejszego braku konkurencyjności kolei oraz wyzwania i rozwiązania proponowane i stosowane dla właściwego uwzględnienia kolei w zrównoważonym systemie transportu w Unii Europejskiej.
8
Content available Improving the quality of voltage in the system of traction power supply of direct current
Sychenko V. G., Bosiy D. O., Kosarev E. M.
Archives of Transport
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2015
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Vol. 35, iss. 3
63--70
EN
Purpose of the work is improved approaches to ensure the required quality parameters of voltage in the traction network based on modern technologies and equipment in the application of power distribution system. Actuality. The introduction of high-speed traffic, increase weight standards Train necessitates increasing the carrying capacity of railways. Often the carrying capacity of existing sections electrified at 3.0 kV DC power supply unit limits. Such limitations include voltage decrease on the electric current collector below the allowable value for the normal operation of 2700 (2900 for high-speed V) and heating the contact wires, thereby losing their mechanical strength. Existing power supply system of RS, which have considerable installed traction substations, can not provide the required level of power density traction network for high-speed movement within 1.5 - 2 MW / km and, respectively, the required voltage quality. At the same time, the daily loading of a powerful traction substations in providing intensive schedule of trains does not exceed 20-25%, while the energy loss in traction network peak load increases and reaches 10-15% of the energy consumed. Thus, the existing system of power traction networks is not sufficiently effective and economical, even with the application of existing methods to strengthen them. In our view, the main limiting factor for a given quality of voltage in the traction network is the use of centralized power. From this, the development of measures to improve the quality of voltage in the traction network in the implementation of high-speed traffic in a growing scarcity of energy resources is an urgent task. Scientific novelty. Using distributed power supply system with adjustable supply points combined into intelligent power supply, which enables adaptive change the characteristics of the transfer, conversion and consumption and optimize the mode of functioning of the traction power supply is suggested for improving the quality of voltage in the traction network in the implementation of high-speed and heavy traffic. Practical significance. Improving the quality of voltage in the traction network by using the proposed circuit design traction power supply will ensure the desired mode voltage and power characteristics of the traction network in the implementation of high-speed and heavy traffic while reducing electricity losses by 20-30%.
9
Content available Kolej metropolitalna w trójmieście – inne spojrzenie
Pazdro P., Judek S., Skibicki J.
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
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2010
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Nr 27
79-83
PL
Pomorska Kolej Metropolitalna jest jedną z naj-większych planowanych inwestycji transportowych w rejonie aglomeracji trójmiejskiej. W artykule przedstawiono koncepcję wykorzystania fragmentu tej inwestycji jako umożliwienie szyb-kiego połączenia Lotniska Rębiechowo z centrum Gdańska. Zapro-ponowano rozwiązania techniczne konieczne do realizacji takiego połączenia dotyczące pojazdu i układu zasilania.
EN
Pomeranian Metropolitan Railway is one of the largest transport investment planned in the Tri-City area. The article presents the con-cept used as part of this investment to enable a fast connection to allow Rębiechowo Airport to the centre of Gdansk. Technical solutions necessary to achieve this combination of vehicle and power system has been proposed.
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