SU1158400A1 - System for power supply of d.c.electric railways - Google Patents

Abstract

THE ELECTRICAL POWER SUPPLY SYSTEM OF THE ELECTRIC CURRENT CURRENT RAILWAYS, containing transducers installed at the traction substation, one pole of which is connected to the rails, and the other through the switches to the contact network, the additional wire suspended through insulators on the contacts of the network, suction transformers, disconnected wires, the primary winding of each of which through the capacitor is connected to the contact wire, and the secondary to the additional wire, with the other ends of the two windings connected to the rail, and jumpers connecting the additional wire with the rails, characterized in that, in order to increase reliability, it is equipped with a switching unit having a contact of the signal relay of the red traffic light, connected through a two-port switch to the jumper break.

Description

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00 4 The invention relates to the power supply of an electric rolling stock. The purpose of the invention is to increase the reliability of the system. The drawing is a schematic diagram of the system. The electric power supply system of direct current electric railways contains converters 1 installed at the traction substations, one pole of which is connected to rails 2 and the other through switches 3 to the contact network 4, an additional wire 5 suspended through insulators. 6 on supports 7 of the contact network 4, suction transformers 8, one end of the primary winding of each of which is connected through a capacitor 9 to the contact wire, and the secondary end to the sub-. an additional wire 5, with the other ends of both windings connected to the rail 2, and jumpers 10 connecting the additional wire 5 to the rails 2. The system is equipped with a switching unit 11 with contact 11.1 having a signal relay contact of the red traffic light 12 connected through a two-terminal 13 into the break of jumper 10. The system works as follows. In the absence of an electric rolling stock 14 (E. p. P.) At the inter-station area in the relay cabinets 15 of its traffic lights 12 in the signal block 16, the yellow fire relay and the green fire relay are energized and the yellow contacts of the yellow fire relay are open the fire and power supply circuits of the coils of the switching unit 11 with the contact 11.1. At the same time, at all the traffic lights 12 of this inter-station zone, the enabling light (yellow, green) is on and the circuits of all its jumpers 10 are open by the closing contacts of the switching unit 11. A harmonic current flows through the contact network 4 of the zone, due to the difference in voltage across adjacent substations of the zone. The voltage difference is created due to the different loads on the zones adjacent to the zone in question. The additional wire 5 carries current under the action of the difference in the voltage of the secondary windings of the suction transformers of 8 adjacent substations. These two currents are of equal magnitude and are in antiphase. In this way, the interfering influence of the traction network is compensated. When they appear in the inter-station zone e. p. 14 and its subsequent movement, the current of the harmonics flowing through the contact network 4 changes its magnitude and direction, since it closes through e. p. 14. If appeared in the in-substation zone e. p. 14 occupies one of its blocks - a section of the path, then in the cabinet 15 of the traffic light 12, enclosing this block - a section, the yellow fire relay and the green fire relay are de-energized. In this case, the opening contacts 17 and 18 of the yellow fire relay are closed and supply voltage to the lamp 19 of the red light of the traffic light 12 and to the coil of the switching unit 11. At this traffic light 12, a red light is on and contact 11.1 of the switching unit 11 closes the circuit of jumper 10 located near this traffic light 12. If e. p. Since the train occupies two blocks - a section, then in cabinets 15 traffic lights 12, enclosing these sections of the path, the yellow fire relay and the green fire relay are de-energized and the voltage of the red lights of both traffic lights 12 and 17 is 18 and 18 on the coils of switching two-terminal 13 jumpers 10 at these traffic lights. As a result, at two traffic lights, a red light is on and the chains of 12 jumpers 10 located near these traffic lights are closed. Due to the closure of the circuits of the jumpers 10, the current in the additional wire 5 changes the magnitude and direction and is again equal in magnitude and opposite in phase to the current harmonics of the contact network, which ensures compensation in the presence of e. p. 14 in the inter-station area. In this state, the power supply system is in a period of time while e. p. 14 moves, within the same blocks of the track. In the transition e. p. 14c from one block-plot to another, the following changes occur. In the cabinet 16 of the traffic light 12, enclosing the first block, the yellow fire relay first operates, then as e is removed. p. 14 triggered relay green fire. When the yellow fire relay is activated, the voltage from the red fire lamp 19 is removed and it goes out and the voltage is applied to the yellow fire lamp 20 and it lights up. When the green fire relay is triggered, the yellow fire lamp 20 is released and supplied to the green lamp 21, the lamp 20 goes out, and the lamp 21 lights up. After the yellow fire relay has been activated, the voltage is removed from the coil of the AND block and the switching and its contact 11.1 breaks the circuit of jumper 10, which is installed near the first traffic light 12, on which the yellow fire lights up. In the closet of the traffic light, enclosing the second block-section of the path, on which e. p. 14, the yellow fire relay drops off, or the yellow fire relay and the green fire relay fall off. In the first case, the voltage is removed from the yellow fire lamp 20, in the second from the green fire lamp 21. The red light of the lamp 19 is energized, it lights up and at the same time the switching unit 11 is activated and the contact 11.1 closes the circuit of jumper 10 located near the traffic light, on which the red light is lit. As a result of these switchings, a change in the magnitude of 3,158,4004 is provided.

phase and current of the auxiliary drive 5, station zone current harmonics contact

which correspond to changes in the value of the network 4 and the current of the additional wire 5 are equal

and phase current harmonics in the contact network 4, the largest and opposite in phase,

due to the movement of the magnetic fields of both

er p. 14 across the inter-station zone. Currents compensate each other and in chains

Thus, when moving e. p. 14 and 5 connection, the interference from the contact network does not occur at any point between the ports.

Claims (1)

DC SYSTEM OF ELECTRIC RAILWAYS OF DC, containing converters installed on traction substations, one pole of which is connected to rails, and the other through switches - with a contact network, an additional wire suspended through insulators on supports of a contact network, suction transformers, one end of each of which through the capacitor is connected to the contact wire, and the secondary to the additional wire, with the other ends of both windings connected to the rail, and jumper is connecting the additional conductor rails, characterized in that, in order to increase reliability, it is provided with a switching unit having contact fire alarm relay red traffic light included in the two-pole jumper through the gap. / 1.158400