摘要:
Trolleybuses, by definition, use a pair of aerial wires and a trolley to draw electrical power from a remote generator. The double-wired lines and the relative trolleys, designed to contact the poles of the aerial line, present some disadvantages that up to now have greatly limited their use and diffusion. Those drawbacks can be summarized in fixed paths, landscape pollution, and complex handlings to recover the electrical contact between the trolley and the line after any interruption. The solutions described in this patent overcome those drawbacks. To supply electrical power to a trolleybus, a peculiar trolley, with two or four traverse elements collecting electrical power from a special aerial single line, is proposed. This special aerial line presents the two poles of a remote generator, periodically alternated along the single line path. Moreover, the proposed solutions suggest an application that applied to a trolleybus powered by common bifilar wire line, enhance their performances and it allows the use of existing bifilar aerial lines, saving large amounts of money.
摘要:
First, a steel wire (1) is continuously dipping in molten copper or molten copper alloy so that copper or copper alloy builds up and solidifies on the peripheral surface of said steel wire, thereby obtaining an initial copper-clad steel wire (2). Then, the initial copper-clad steel wire (2) is subjected a first cycle of hot rolling by a caliber roll. The hot-rolled wire is dipped in molten copper or molten copper-alloy (21) at least once so that copper or copper alloy builds up and solidifies thereon, thereby obtaining a final copper-clad steel wire. The final copper-clad steel wire is hot-rolled at a temperature of 750 to 850°C and with a rolling ratio of 10 to 40%. Then, the hot-rolled wire is cold-rolled with a reduction of area of 20% or more. Thus, 75 to 90% of the cross sectional area of the obtained copper-clad steel trolley wire is occupied by the copper or copper alloy covering layer (3) so that the electric conductivity of the trolley wire is very high as 80% IACS or more. Moreover, the cast rod (2) is hot-rolled so that the core (1) and the covering layer (3) are metallurgically bonded to each other, thereby obtaining a copper-clad steel trolley wire whose core and covering layer are firmly bonded. Also, the hot-rolled wire is cold-rolled so that the trolley wire with a high strength is obtained.
摘要:
In a copper-clad steel trolley wire, the peripheral surface of a core (1), formed of a steel wire, is covered by a copper or copper-alloy covering layer (2). Forty-five to 75 % of the cross-sectional area of the copper-clad steel trolley wire is occupied by the covering layer (2). The core (1) and the covering layer (2) are metallurgically bonded to each other. Even if the covering layer (2) is worn away so that the core (1) is exposed, corrosion cannot advance at the boundary between the core (1) and the covering layer (2), since the core and the covering layer are firmly metallurgically bonded to each other. The composite cast rod, obtained by the dip forming method, is hot-rolled under predetermined conditions so that the copper or copper-alloy covering layer is metallurgically bonded to the steel core. Thus, the copper-clad steel trolley wire with a uniform covering layer thickness can be manufactured at low cost.
摘要:
The invention provides a distributed power generation and power supply system for a traction network, and a control method, and relates to the technical field of electrified railway traction power supply. A traction side of an co-phase traction substation is connected with a traction bus; the traction bus is connected with a traction network by means of a feeder line; a power generation apparatus of a railway arranged in a corridor along a railway line accesses, in a distributed manner, a traction power supply system by means of a switching station along the railway line; a central coordinated controller of the co-phase traction substation controls an operating mode of the power generation apparatus, and executes power generation and reactive allocation control. The distributed-type access to a traction power supply system is beneficial to supporting the system network voltage and prolonging the power supply distance, realizing distributed-type access and nearby consuming of new energy, promoting green development of a railway system, and avoiding related electric energy quality problems. The invention is mainly used for management of connecting distributed-type power generation and power supply systems to the traction network.
摘要:
A method of detecting arcing between two electrical conductors the method including generating an image of the electrical conductors; determining a region of interest in the image where arcing between the electrical conductors is likely to occur, isolating the region of interest processing arcing candidates captured in the image and falling within the region of interest to screen the arcing candidates to reject artefacts likely to have been caused by factors other than arcing, and validating that a selected arcing candidate is an arc by further processing the selected arcing candidate.
摘要:
First, a steel wire (1) is continuously dipping in molten copper or molten copper alloy so that copper or copper alloy builds up and solidifies on the peripheral surface of said steel wire, thereby obtaining an initial copper-clad steel wire (2). Then, the initial copper-clad steel wire (2) is subjected a first cycle of hot rolling by a caliber roll. The hot-rolled wire is dipped in molten copper or molten copper-alloy (21) at least once so that copper or copper alloy builds up and solidifies thereon, thereby obtaining a final copper-clad steel wire. The final copper-clad steel wire is hot-rolled at a temperature of 750 to 850°C and with a rolling ratio of 10 to 40%. Then, the hot-rolled wire is cold-rolled with a reduction of area of 20% or more. Thus, 75 to 90% of the cross sectional area of the obtained copper-clad steel trolley wire is occupied by the copper or copper alloy covering layer (3) so that the electric conductivity of the trolley wire is very high as 80% IACS or more. Moreover, the cast rod (2) is hot-rolled so that the core (1) and the covering layer (3) are metallurgically bonded to each other, thereby obtaining a copper-clad steel trolley wire whose core and covering layer are firmly bonded. Also, the hot-rolled wire is cold-rolled so that the trolley wire with a high strength is obtained.
摘要:
Die Erfindung betrifft eine Vorrichtung zur Überwachung eines Fahrdrahtes auf Abnutzung oder Beschädigung, wobei der Fahrdraht rohrförmig ist und somit einen sich über die Länge des Fahrdrahtes erstreckenden Hohlraum aufweist. Es ist vorgesehen, dass sich im Hohlraum mindestens ein Medium befindet. Wenn infolge einer Beschädigung des Fahrdrahtes dieses Medium mit der Umgebung oder mit einem Pantographen eines vorbeifahrenden Schienenfahrzeugs in Kontakt kommt, wird durch dieses Medium eine Information an mindestens einen Sensor übermittelt, der mit dem Medium dazu in Verbindung steht. Der mindestens eine Sensor ist mit einer Anzeige- und Auswerteeinheit verbunden. Das Medium kann gasförmig, flüssig oder fest sein.