JPS6094832A - Section switch for dc electric railroad - Google Patents

Abstract

PURPOSE:To surely supply and regenerate electric power, by providing two sections between neighboring substations so that the sections are insulated from electric vehicle feeders, and by inserting switching elements between electric lines which sandwich the sections, and by opening or closing the switching elements in response to the output signals of current detectors. CONSTITUTION:When an electrical current flows through a section 2a due to the presence of an electric vehicle, a thyristor breaker 5a is turned on by the action of a current relay 8a and another thyristor breaker 5b remains off. When an electrical current flows through another section 2b due to the movement of the electric vehicle, the breaker 5b is turned on and the other breaker 5a is turned off. Since both substations SS1, SS2 are not short-circuited to each other through an electric vehicle feeder 1a, a diode 3a, the breaker 5a, a diode 4b, electric vehicle feeders 1b, 1c, a diode 6a, the breaker 5b, a diode 7b and an electric vehicle feeder 1d, no current flows in even if the output voltages of the substations differ from each other. As a result, electric power is surely supplied and regenerated, and the insulation of the substations from each other is improved to enhance safety.

Description

DETAILED DESCRIPTION OF THE INVENTION (Branch 1 of the Invention) The present invention relates to a supply device for a direct current type LIL train, and more particularly to a section opening/closing device for a direct current type TT railway.

(Problems with the prior art) In terms of power supply equipment for DC electric railways, two adjacent
For example, between the two substations, the 1st and 8tE2IIC lanes are provided on the DC output side of both substations, and the 3rd and 8tE2IIC lanes are separated by sections between these ml, g2i lanes. , lanes, said 1st military lane and 3'l
11 is inserted into the electric line connecting the lanes, and a parallel circuit consisting of a first switching control element for driving and a second switching control element for regeneration connected in parallel, 1 m from the second lane.
3. A parallel circuit, etc. is provided which is inserted into the "4" road connecting certain lanes, and is formed by connecting a third switching control element for driving and a fourth switching control element for regeneration in parallel. Conventionally, for example, the following operation was performed in the device: When an electric car runs from one side (change/glans side) to the other side (change/off side), the first and Both of the second switching damping elements for regeneration are turned on. When the vehicle that makes a power running error is located at the 1st fM, below the lane, power is supplied from one substation. Next, when moving to the power running 'α electric car section and short-circuiting the first and third overhead contact lines using the pantograph, the power running '1 power is directly supplied to this power running/electric car from one substation, and one During the change, power is supplied from Jt to gl' through the first switching control element for lane and row. At this time, the power running current flowing to the first switching control +lIa element for power running is detected by an NT flow reverse device such as a current transformer, and the D production signal is similarly turned on to turn on the third switching control element for power running. 2nd for regeneration
Turn off the switching control. In addition, if the electric car is performing regenerative operation when the first and third contact lines are short-circuited by the pantograph of the electric car, this regenerative power of the electric car is transferred to one side via the first contact line. It is regenerated to one of the substations, and is also regenerated to one of the substations via the first overhead contact line and the second switching control element for regeneration. At this time, the regenerative current flowing to the second switching control element for regeneration is detected by a current detector such as a current transformer, and the detection signal is used to turn off the first switching control element for power running and turn off the fourth switching control element for regeneration. Turn on the control element.

As mentioned above, the conventional device ``judges the operating state of the electric vehicle using a rectangular flow detector, etc., and detects the first to fourth
Since the switching control element was turned on and off, the control operation was extremely complicated. For this reason, the reliability of the device decreases, and for example, the switching control element causes a short-circuit between both G and IA, and at this time, if the output voltages of the two variable points are different, one of the variable voltages is different. An unstable phenomenon occurs in which the output current of one turning point flows into the other turning point. Furthermore, since the conventional device has a complicated circuit configuration, the price of the entire device increases. In particular, since the number of switching control elements required is large, if the switching control element is a thyristor circuit breaker and U141J1517, the price of the device H would rise significantly.

(Object of the Invention) The present invention has been made in view of the above points, and it is possible to simplify the configuration of the device, improve the reliability as mentioned above, and significantly reduce the cost of the device. To provide a section division switchgear for a DC type 4-air railway, which can reliably supply electric power or regenerate generated power through simple control operations according to the requirements, and has good insulation between adjacent substations. It is an object.

(Summary of the invention) The present invention provides two substations that are insulated from overhead contact lines between two adjacent substations.
Two section V-yons are installed one train length apart, and a switching control element is inserted in each of the electric paths connecting the contact lines that sandwich these sections. The switching control element is turned on and the other switching control element is turned off, and when the electric car moves and current flows to the other section, the other switching control element is turned on and one switching control element is turned off. It is characterized by being configured as follows.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 88 in Figure 1. ．． 8B are two DC converters adjacent to each other. The positive output end of this variable 1θrss is connected to the electric S line la. A cable line 1 is provided in series with the overhead contact line 1a via a section 2a for dividing the overhead contact line.

The positive output end of the substation SS is connected to the overhead contact line 1d. On this overhead contact line 1d, a ′th lane IC is provided in parallel with the overhead contact line 1b via a section 2b. The anode of a diode 3a and the cathode of a diode 4a are connected to the overhead contact line 1a, and the anode of a diode 3b and the cathode of a diode 4b are connected to the overhead contact line 1b. A common connection point A connecting the cathodes of diodes 3a and 3b is connected to an anode of a first switching control element, for example a thyristor circuit breaker 5a. The cathode of the thyristor circuit breaker 5a is connected to a common connection point B connecting the anodes of the diodes 4a and 4b. Diode 6a on the electric line IC
The end node of the contact line ldζ is connected to the cathode of the diode 7a, and the anode of the contact line ldζ is connected to the anode of the diode 6b and the cathode of the diode 7b. A common connection point a4 connecting the cathodes of the diodes 6a and 6b is connected to the anode of a second switching control element, for example, the cylindrical IJ star circuit breaker 5b. The cathode of the cylindrical IJ star circuit breaker 5b is a diode 7a and 7b.
It is connected to the common connection point that connects the γ nodes. A first current detection means, such as a current relay 8a, is connected between the section 2a and the overhead contact line 1a, and a second current detection means, for example, a current relay 8a, is connected between the section 2b and the overhead contact line 1d.
For example, a current relay 8b is connected. This current relay
The device 8a has a function of emitting a signal for turning on the thyristor circuit breaker 5a and a signal for turning off the thyristor circuit breaker 5b when detecting a current. Further, the current relay 81) has a function of emitting a signal for turning on the thyristor circuit breaker 5b and a signal for turning off the thyristor circuit breaker 5a when detecting a current. Furthermore, section 2a
The interval Li between section 2b and section 2b is approximately 1 car length i.

Next, the operation of the apparatus configured as described above will be explained with reference to the detailed circuit diagram shown in FIG. In FIG. 2, the inter-section distance l is assumed to be equal to the length of one train train.

The electric car (not shown) goes from substation SB to substation 8B.
It is assumed that the thyristor circuit breakers 5a and 5b are both in the OFF state. First, if there is an electric car (not shown) at F under the overhead contact line]a, then this electric car is connected to the substation SS.

Power is directly supplied from the substation SS, and regenerative energy when the electric vehicle performs regenerative operation is directly supplied to the substation SS.
, is regenerated. Next, it is assumed that the rJj electric car moves to the part A in the figure, and the leading pantograph (not shown) of the electric car comes into contact with the section 2a.

At this time, the electric car was connected to the substation SS and the contact line 1a.

Power is supplied via current relay 8a and section 2a. In this case, a predetermined current flows through the section 2a, and the current relay 8a detects the amount of current, so that an on-gate signal is supplied to the thyristor circuit breaker 5a and an off-gate signal is supplied to the thyristor circuit breaker 5b. This turns on the thyristor circuit breaker 5a, and keeps the thyristor circuit breaker 5b in the off state. Next, it is assumed that the electric car moves to the illustrated opening and the leading pantograph (not shown) of the electric car comes into contact with the section 2a and the overhead contact line 1b. At this time, the electric car is connected to the electric train from the substation SSI]
a+sex? Power is supplied to the substation 8B via the electric line 2a and 1b.

From train 11ji! 1. A, the diode 3a, the thyristor shield 5a, the diode 4b, and the contact line 1b are valved to supply power to the main line. At this time, when the electric car regenerates and rotates, the regenerated energy is in section 2.
Substation SS via a and contact line la.

At the same time as being regenerated, Seki/One 2 A* '4s car G1B.

It is regenerated to the substation SS via the diode 3b, the sirisk cutoff 55a, the diode 4a, and the contact line 1a. Next, assume that the electric car moves to the substation SS2 side and crosses section 2a, and at the same time the leading pantograph of the electric car contacts section 2b (part C in the diagram).
. At this time, the electric car goes from substation SS to contact line 1 (1,
The current is transmitted through relay 8b and section 2b.
t force is supplied.

In this case, the required current flows through the sector v=I input 2b, and the current is detected by the current junction 'l', so that an on-gate signal is supplied to the thyristor circuit breaker 51) and an off-gate signal is supplied to the thyristor circuit breaker 5a. A signal is provided. This turns on the thyristor circuit breaker 5b and turns off the thyristor circuit breaker 5a. As a result, the electric cars (
Power is supplied to the substation SS (not shown) via the overhead contact line ld, current relay 8b, and section 2b, and from the substation SS to the substation SS, the hidden wire 1a, the diode 6b, and the thyristor circuit breaker 5b. , the diode 7a, and the overhead contact line ]C.

At this time, when the d-air car performs regenerative operation, the regenerated energy is regenerated to the substation SS via section 2b and α lane 1d, and is also regenerated to section 2 b e
Ft car UIC, diode 6a, thyristor interrupter 11J
It is regenerated to the substation SS2 via the transformer 5b, the diode 7b, and the overhead contact line 1d. Next, “Niketan is a substation SS
, and crosses section 2b, power is directly supplied to this electric car from substation SS2. At this time, the DC g electric device 8b detects no current in the section 2b, so the thyristor circuit breaker 5b is turned off.

As described above, when one thyristor circuit breaker 5b is turned on, the other thyristor circuit breaker 5a is turned off at the same time, so that the contact line 1a is connected between both glans ss, and ss.

Diode 3a, thyristor cutoff Wii5a, diode 4 bl 'A lane 1b (IC1, diode 5a.

Thyristor circuit breaker 5b, diode 7b and overhead contact line 1
There is no possibility of a short circuit via d. For this reason, even if the output voltages of the two destinations ss, , ss are different, current will not flow from one substation, eg, SS, to the other substation, SS. The same operation as described above is also performed when the electric car moves from substation SS to substation 8B, =lIl+. Further, the switching control element is not limited to the thyristor interrupter, but may be other devices having the same function, and the current reduction detection means is 'Mt blt
: It is not limited to electric appliances, but may be other items having the same function.

(Effects) As described above, according to the present invention, two sections insulated from the tram line are provided between adjacent tramlines and palaces, separated by one tram line, and the tun AL line sandwiching these sections is connected.
, a switching control element is inserted in each of the It paths, and when ri current flows in one section due to the presence of power in the electric car, one switching control element is turned on and the other switching control element is turned off, and I4 is also turned on. When the electric car moves and ・i + jiE flows to the other section, the other switching control element is turned on and one switching control element is turned off. section)'@
(Even if the
L power can be supplied or electric power can be regenerated, and the insulation between adjacent substations is improved, improving safety. In addition, the device configuration is simplified and reliability is increased.
It is possible to improve the equipment price and lower the equipment price.

[Brief explanation of drawings]

1 and 2 both show an embodiment of the present invention,
FIG. 1 is a circuit diagram showing a schematic configuration, and FIG. 2 is a circuit diagram explaining details. ss, , ss, ... DC variable Yi place, la, ]b,
lc, ld...telephone line, 2a, 2b...section,
3 a, 3'b. 4a, 4b, 6a, 6b, 7a, 7b...diode, 5a, 5b...thyristor breaker, 8a, 8b...
Current relay.

Claims (3)

[Claims] (1) A first overhead contact line connected to the DC output side of the first substation and a 2′-lane connected to the DC output side of the second substation installed adjacent to the first substation. and a third lane provided on the first overhead contact line via the first section;
A diode is bridge-connected to a fourth electric wire, which is provided to the second overhead contact line via a second section and is arranged in parallel with the third overhead contact line, and one end of the input terminal is connected to the first contact line.
connected to the overhead contact line, and the other end of the input end is connected to the 34th contact line.
14) 1 bridge circuit connected to the lane I and this first
A first switching control resistor connected between the positive and negative output terminals of the bridge circuit and a diode are bridge-connected,
A second bridge circuit having one end of the input side connected to the fourth overhead contact line and the other end of the input side connected to the second overhead contact line, and a second bridge circuit connected between the positive and negative output terminals of the second bridge circuit. A second switching control element is inserted into an electric line connecting the first section and the first overhead contact line, and when a current flows through the branch, a signal is generated to turn on the first switching control element; a first current detection means for emitting a signal for turning off the second switching control element; 2. It emits a signal to turn on the switching damping element, and
A direct current system (air railway section division opening/closing device 1) characterized in that it is equipped with a second compulsive current detection means for emitting a signal for turning off the first switching control element. (2) The section division switchgear for a DC type railway as set forth in claim 1, wherein the switching control element is comprised of a Zyristor circuit breaker. (3) The section division switchgear for a DC electric railway according to claim g1 or claim 2, characterized in that it comprises the +Jt flow measurement detection means flow relay.