JP6111759B2 - Middle section power switching system for AC electric railway - Google Patents

Description

  The present invention relates to a power switching system for a middle section provided in a different-phase power butt section of an AC electric railway.

  In an AC electric railway, a switching section is provided in a section for switching feeding power sent from two adjacent substations (different phase power supply butt section) (for example, Patent Documents 1-4).

  For example, in the Japanese Shinkansen (registered trademark) system, a switching section as shown in FIG. 4 is used. In this system, AC power supplies 2a and 2b having different phases from two adjacent substations are connected to feeders 1a and 1b, respectively.

  A middle section 4 is provided between the feeders 1a and 1b via air sections 3a and 3b for insulation. A switch 5 a is inserted in the electrical path connecting the feeder 1 a and the middle section 4, and a switch 5 b is inserted in the electrical path connecting the feeder 1 b and the middle section 4.

  The train 6 travels on a rail (track) not shown. The rail is provided with a track circuit (not shown) for detecting the position of the train 6. The train position detection signal of the track circuit is transmitted to a control unit of a power supply switching system (not shown), and the control unit controls on / off of the switches 5a and 5b based on the train position detection signal.

  With this configuration, power is supplied from the power source on the side of the switch 5a by keeping the switch 5a in the on state and the switch 5b in the shut-off state until all the trains 6 reach the middle section 4 range. When it is detected that all the trains 6 have entered the middle section 4, the switch 5a is switched off and the switch 5b is switched on, and the supply of power from the power source on the switch 5b side is started. Furthermore, when it is detected that all the trains 6 have completely exited the middle section 4, the switches 5a and 5b are returned to their original states. By repeating this operation, an instantaneous power failure (200 to 300 ms) occurs when the switches 5a and 5b are switched, but the power supply to the feeders can be switched, and the driver can pass through the different phase power supply butt section. You can drive while driving without being conscious.

  In an actual Shinkansen system, two sets of switching sections, a switching section for switching feeding power and a spare switching section, are provided in the upward direction and the downward direction of the train 6, respectively. Each of the pair of switches provided in these switching sections is provided with an open / close control mechanism for performing open / close control.

JP 2009-132363 A JP 2003-207772 A JP 2007-1560 A JP 2009-190641 A

  In the switching section according to the prior art, each switch 5a, 5b is provided with an opening / closing control mechanism as shown in FIG. As a result, a large space is required to accommodate the switches 5a and 5b. In addition, since the switching frequency of the switches 5a and 5b is high, there is a risk that problems may occur in the switching control mechanism and the switches 5a and 5b.

  Further, the switches 5a and 5b need to be switched on within 250 ms to 350 ms after the switch 5a has been shut off. As a result, in addition to the malfunction of the switches 5a and 5b, there is a possibility that a malfunction occurs in the switchboard that manages and controls the switching time of the switches 5a and 5b, and a system is provided to provide means for dealing with the malfunction. Is getting complicated.

  In view of the above circumstances, an object of the present invention is to provide a technique that contributes to simplifying a control mechanism of a switch in a middle section power supply switching system of an AC electric railway.

  In the AC electric railway medium section power switching system of the present invention that achieves the above object, the first and second feeders respectively connected to adjacent different-phase AC power sources, and the first and second feeders are connected. A first section provided between the first section and the second air section, and a first section interposed between the first section and the middle section. The first vacuum valve and the second vacuum valve of a power supply facility having one vacuum valve and a second vacuum valve interposed in an electric path connecting the second feeder and the middle section are switched. A middle section power supply switching system for an AC electric railway, wherein a movable electrode shaft for shutting off and turning on the first vacuum valve is connected to one end and a movable electrode shaft for shutting off and turning on the second vacuum valve is connected to the other end The electrode shaft was connected Freely journaled rotating the exchange member, in accordance with the tilt of the switching member, it is characterized by performing blocking and closing operation of the first vacuum valve and second vacuum valve.

  ADVANTAGE OF THE INVENTION According to this invention, it can contribute to simplifying the control mechanism of a switch in the middle section power supply switching system of an AC electric railway.

It is the principal part schematic of the switch control apparatus of the switch in the middle section power supply switching system which concerns on embodiment of this invention. It is explanatory drawing explaining the rotational motion of a cam and the open / close state of a switch in the middle section power supply switching system which concerns on embodiment of this invention. It is explanatory drawing explaining the outline | summary of the switching breaker board which controls the middle section power supply switching system which concerns on embodiment of this invention. It is explanatory drawing explaining the outline | summary of the middle section power supply switching system of an alternating current electric railway. It is a figure which shows the switching control mechanism of the switch concerning a prior art.

  A middle section power supply switching system according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is characterized by an open / close control device that performs open / close control of the switches 5a and 5b in power switching of the middle section of the AC electric railway shown in FIG. Therefore, the schematic configuration of the power switching system for the middle section of the AC electric railway according to the embodiment of the present invention is the same as the outline of the power switching system for the middle section of the AC electric railway according to the related art shown in FIG. Detailed description is omitted.

  FIG. 1 is a diagram showing an outline of an open / close control device 7 of a middle section power supply switching system according to an embodiment of the present invention. The opening / closing control device 7 controls the shut-off / closing operation of the switches 5a and 5b.

  As shown in FIG. 1, the switching control device 7 includes a switching member 8 that switches between breaking and closing of the switches (vacuum valves) 5 a and 5 b, a cam 9 that controls the operation of the switching member 8, and the power of the cam 9. And a driving force transmitting member 10 that transmits the switching member 8.

  A rotation shaft 8a is provided at the center of the switching member 8, and the switching member 8 is pivotally supported by the rotation shaft 8a. One end of the switching member 8 is connected to a movable electrode shaft 11a of a switch 5a (vacuum valve) via a metal fitting 16 and an insulating rod 17, and the other end of the switching member 8 is connected via a metal fitting 16 and an insulating rod 17. Then, the movable electrode shaft 11b of the switch 5b (vacuum valve) is connected. The metal fitting 16 has a bottomed cylindrical frame member 16a slidably provided with a slide shaft 16b. The wiper spring 15 provided on the slide shaft 16b allows the frame member 16a to be connected to the switch 5a (or It is pressed in the direction of the switch 5b). Thus, by connecting the movable electrode shafts 11a and 11b to the switching member 8 via the insulating rods 17 and 17, the movable electrode shafts 11a and 11b which are charging parts of the switches 5a and 5b are an operation system. The switching member 8 is connected in an insulated state. In addition, the driving force transmission member 10 is provided between the rotating shaft 8a of the switching member 8 and the connection part of the movable electrode shaft 11a of the switch 5a. A spring 12 for pressing the driving force transmission member 10 in the direction of the cam 9 is provided between the rotating shaft 8a of the switching member 8 and the connecting portion of the movable electrode shaft 11b of the switch 5b.

  One end of the driving force transmission member 10 is provided between the rotating shaft 8a of the switching member 8 and the connecting portion of the movable electrode shaft 11a of the switch 5a, and the other end of the driving force transmission member 10 is in contact with the cam 9. A contact roller 13 is rotatably provided. Further, a guide 14 is provided on the side surface of the driving force transmission member 10, and the driving force transmission member 10 moves along the guide 14 in accordance with the rotation operation of the cam 9. The guide 14 is, for example, a member having a U-shaped cross section, and the driving force transmission member 10 moves along a groove formed in the guide 14.

  The cam 9 is a substantially triangular plate member, and is provided so as to be rotatable in a state where its side surface is in contact with the roller 13. That is, since the roller 13 is pressed in the direction of the cam 9 by the spring 12 provided on the switching member 8, the roller 13 follows the outer peripheral surface of the cam 9 according to the rotational movement of the cam 9. The shape of the cam 9 is, for example, the distance between the apex of the triangle and the rotation axis 9a of the cam 9> the distance between the oblique side of the triangle and the rotation axis 9a of the cam 9> the distance between the bottom of the triangle and the rotation axis 9a of the cam 9. It is formed in a substantially isosceles triangle shape. By forming the cam 9 in this way, the distance between the rotating shaft 9 a of the cam 9 and the roller 13 contact portion of the cam 9 changes according to the rotation of the cam 9. As a result, the inclination of the switching member 8 changes according to the distance between the rotating shaft 9a of the cam 9 and the roller 13 contact portion of the cam 9.

  With reference to FIG. 2, the relationship between the rotation angle of the cam 9 and the stroke width of the switches 5a and 5b will be described in detail.

  When the cam 9 is in a standby state (0 ° state), the roller 13 is in contact with the apex of the cam 9. In this state, the distance between the rotating shaft 9a of the cam 9 and the roller 13 contact portion of the cam 9 is the longest, and as shown in FIG. 1, the switching member 8 connects the movable electrode shaft 11a of the switch 5a to the switch. It will be in the state pushed into 5a. On the other hand, the movable electrode shaft 11b of the switch 5b is located farthest from the switch 5b. That is, the switch 5a is turned on (indicated by hatching in FIG. 2), and the switch 5b is cut off.

  When the rotation of the cam 9 starts, the stroke width of the switches 5a and 5b hardly changes. This is because the stroke width of the switches 5a and 5b does not change even when the inclination of the switching member 8 changes due to the action of the wipe spring 15 provided on the sliding shaft 16b of the metal fitting 16 on the switch 5a side. This is because the charged state of 5a is maintained. The wipe springs 15 are provided on the sliding shafts 16b of the metal fittings 16 connected to the movable electrode shafts 11a and 11b of the switches 5a and 5b, respectively. A contact pressure is applied between the electrode and the movable electrode.

  When the cam 9 further rotates (90 ° state), the roller 13 comes into contact with the oblique side portion of the cam 9 (the oblique side portion of the cam 9 that is R1 away from the rotation shaft 9a of the cam 9 in FIG. 2). As a result, as shown in FIG. 2, the switching member 8 is in a state where neither of the movable electrode shafts 11a and 11b of the switches 5a and 5b is pushed. That is, both the switches 5a and 5b are in a cut-off state.

  When the cam 9 further rotates (180 ° state), the roller 13 comes into contact with the bottom portion of the cam 9. The shape of the bottom portion of the cam 9 is formed such that the distance between the rotating shaft 9a of the cam 9 and the roller 13 contact portion of the cam 9 is further shorter than R1. As a result, the switching member 8 is in a state where the movable electrode shaft 11b of the switch 5b is pushed into the switch 5b. On the other hand, the movable electrode shaft 11a of the switch 5a is located farthest from the switch 5a. That is, the switch 5b is turned on (indicated by hatching in FIG. 2), and the switch 5a is cut off.

  When the cam 9 further rotates (270 ° state), the roller 13 again comes into contact with the oblique side portion of the cam 9 (the oblique side portion of the cam 9 that is R1 away from the rotation shaft 9a of the cam 9 in FIG. 2). Both of the switches 5a and 5b are cut off.

  When the cam 9 further rotates (in a state of 360 °), the switch 5a is turned on and the switch 5b is cut off to enter a standby state.

  As described above, the turning on / off of the switches 5a and 5b can be controlled by the rotation operation of the cam 9. That is, the opening / closing control device 7 according to the embodiment of the present invention includes “inserting the entrance-side switch 5 a”, “blocking the advancing-side switch 5 b”, “cutting off the advancing-side switch 5 a”, “ It has three types of state modes: “Insert switch 5b” and “Neutral” (“Shut off entry-side switch 5a” and “Shut off advance-side switch 5b”) and control the rotation speed of cam 9 with a servo motor or the like. By doing so, the switching control operation of the switches 5a and 5b when the train 6 passes can be performed.

  With reference to FIG. 4, the middle section power supply switching system according to the embodiment of the present invention will be described in more detail.

  Similar to the prior art, in the middle section power supply switching system according to the embodiment, the AC power supplies 2a and 2b having different phases from two adjacent substations are connected to the feeders 1a and 1b, respectively.

  A middle section 4 is provided between the feeders 1a and 1b via air sections 3a and 3b for insulation. A switch 5 a is inserted in the electrical path connecting the feeder 1 a and the middle section 4, and a switch 5 b is inserted in the electrical path connecting the feeder 1 b and the middle section 4. For example, a vacuum valve (VI) is used as the switches 5a and 5b.

  The train 6 travels on a rail (track) not shown. The rail is provided with a track circuit (not shown) for detecting the position of the train 6. The train position detection signal of the track circuit is transmitted to a control unit of a power supply switching system (not shown).

  When the train 6 is at the position of the feeder 1a (when the train position is 1 in the figure), the cam 9 is waiting in the state of 0 ° shown in FIG. That is, the switch 5a is turned on and the switch 5b is cut off. For this reason, the power is supplied to the train 6 from the AC power source 2a, and the train 6 enters a standby state with the AC power source 2a having the same phase as that of the middle section 4 feeder 1a.

  Next, when the train 6 enters under the middle section 4 and its position is detected (when the train position is 2 in the figure), the control unit transmits a signal for starting the rotation operation of the cam 9. This signal causes the cam 9 to rotate at a predetermined rotational speed. In addition, by forming the cam 9 so that the distance between the rotating shaft 9a of the cam 9 and the roller 13 contact portion of the cam 9 is abruptly shortened with the rotation operation of the cam 9, the cam 9 is quickly rotated with the rotation of the cam 9. The switch 5a can be switched off. Thus, when the cam 9 rotates, the switch 5a is cut off, and the switch 5b maintains the cut off state.

  In the oblique side portion of the cam 9, the distance between the rotating shaft 9a of the cam 9 and the contact portion of the roller 13 of the cam 9 such that the switches 5a and 5b are cut off (for example, R1 as a representative of the distance) By taking many parts (or by controlling the length of the part where the distance is R1), it is possible to control the time for which the switches 5a and 5b are both in the cut-off state. In other words, by adjusting the length of the portion of the oblique side portion of the cam 9 where the distance between the rotating shaft 9a of the cam 9 and the roller 13 contact portion of the cam 9 is R1, it can be opened and closed according to the rotational speed of the cam 9. The time from when the device 5a is shut off until the switch 5b is turned on can be controlled to be within 250 ms to 350 ms.

  When the cam 9 further rotates, the roller 13 comes into contact with the bottom side of the cam 9 (for example, the state of 180 ° in FIG. 2). As a result, the switch 5a remains switched off and the switch 5b is turned on, and power is supplied to the train 6 below the middle section 4 from the AC power supply 2b via the switch 5b. Here, the length of the bottom side of the cam 9 is a factor that determines the time during which the switch 5b is turned on. Therefore, it is preferable to form the switch 5b as long as possible so that the switch 5b is cut off after all the trains 6 have passed through the middle section 4. Alternatively, the cam 9 may be temporarily stopped in the state of 180 ° in FIG. 2, and the rotation operation of the cam 9 may be resumed after all the trains 6 have passed through the middle section 4.

  Next, after the train 6 enters the feeder 1b and the train 6 passes through the middle section 4, the cam 9 further rotates (state of 270 ° in FIG. 2), and the switches 5a and 5b are cut off. When the cam 9 rotates 360 °, the switch 5a is turned on again and the switch 5b is turned off. In this state, the cam 9 is in a standby state until the next train 6 enters the middle section 4.

  Thus, the opening / closing operation of the switches 5a and 5b is performed by the rotation operation of the cam 9, and the train 6 can pass through the different phase power supply butt section (the middle section 4) while being powered.

  When the train 6 travels in the opposite direction, the switches 5a and 5b are controlled in the opposite manner.

  As described above, the AC power railway middle section power supply switching system according to the present invention has two switches for switching the power of the middle section, and an opening / closing control device for performing on / off control of the two switches. Therefore, the middle section power supply switching system can be simplified as compared with the conventional system.

  For example, the opening / closing control device of the present invention can control the switching and closing of two switches according to the rotational speed of the cam and the shape of the cam. As a result, the switching time of 250 ms to 350 ms, which is conventionally adjusted by the control panel, can be controlled by the mechanical mechanism of the circuit breaker body, and the configuration on the switchboard side can be simplified. In addition, since the time (timing and period) during which the two switches are shut off can be controlled by the shape of the cam, the entrance side switch and the advance side switch can be turned on simultaneously. A control circuit such as an interlock to prevent is unnecessary, and the entire system can be simplified. In addition, since the switching control device of the present invention can perform switching control of the switch by directly inputting the train “present” and “none” signals, the position of the train that has been conventionally performed on the control panel of the switchboard room A circuit for transmitting information is not necessary, and the entire system can be simplified.

  Thus, by simplifying the middle section power supply switching system, the number of failure items of the apparatus is reduced, and the MTBF (average failure interval) is significantly improved. Further, since the control mechanism of the opening / closing control device is performed by the rotational operation of the cam, the operation mechanism of the opening / closing control device becomes simple, and the MTBF is remarkably improved. Furthermore, by simplifying the power supply switching system, a significant cost reduction effect can be obtained.

  Further, the opening / closing control device of the present invention can individually perform the switching control operation of the two switches at a high speed by one operation mechanism by the rotational movement of the cam and the swing of the switching member. Compared with the case where each switch is provided with an open / close control device, the installation space for the open / close control device can be reduced to about 1/4. Furthermore, the opening / closing control mechanism can be configured with one surface of a cubicle in which a switch for one line and a control panel are integrated.

  Then, as shown in FIG. 3, the switching circuit breaker panel is housed in a sealed tank filled with dry air with the main circuit part other than the switch such as the disconnect switch (DS), and the switching control part is inserted into the disconnect switch. A so-called plug-in AIS (Air Insulated Switch) configuration can be adopted. With this configuration, safety and reliability are improved, workability when the switch is frequently replaced is improved, and update work of the switching switch body is facilitated.

  In addition, the middle section power supply switching system of the AC electric railway of the present invention is not limited to the above-described embodiment, and can be appropriately designed and modified within a range that does not impair the operation and effect. The form also belongs to the technical scope of the middle section power supply switching system of the AC electric railway of the present invention.

  For example, in the embodiment, the positional relationship between the switch and the cam is not limited to the position of the embodiment as long as the inclination of the switching member can be changed. For example, on the side where the switch of the switching member is provided. The form which provides a cam may be sufficient.

DESCRIPTION OF SYMBOLS 1a, 1b ... Feed wire 2a, 2b ... AC power supply 3a, 3b ... Air section 4 ... Middle section 5a, 5b ... Switch (vacuum valve)
6 ... Train 7 ... Opening / closing control device 8 ... Switching member 8a ... Rotating shaft 9 ... Cam (rotating member)
9a ... rotating shaft 10 ... driving force transmission members 11a, 11b ... movable electrode shaft 12 ... spring 13 ... roller 14 ... guide 15 ... wipe spring 16 ... metal fitting 16a ... frame member 16b ... sliding shaft 17 ... insulating rod

Claims (2)

First and second feeders respectively connected to adjacent heterophase AC power sources;
A middle section provided between the first and second feeders, wherein the first and second feeders are respectively insulated by first and second air sections;
A first vacuum valve interposed in an electrical path connecting the first feeder and the middle section;
In an AC electric railway for switching between the first vacuum valve and the second vacuum valve of a power supply facility having a second vacuum valve interposed in an electric path connecting the second feeder and the middle section Section power switching system,
A switching member having one end connected to a movable electrode shaft for blocking and closing the first vacuum valve and the other end connected to a movable electrode shaft for blocking and closing the second vacuum valve is rotatable. Pivot,
A driving force transmission member provided between the rotation shaft of the switching member and the connecting portion of the movable electrode shaft of the first vacuum valve;
E Bei and a different rotational member of the rotation diameter pivotably mounted in the contact with the end surface opposite the connecting portion of the switching member of the driving force transmitting member,
The distance between the rotating shaft of the rotating member and the contact portion with which the driving force transmitting member of the rotating member contacts is set so that the first vacuum valve is turned on when the rotating member is in a standby state. The length is formed to push up the end to which the movable electrode shaft is connected, and the distance is shortened with the rotation of the rotating member, and the distance is set in the state rotated 180 degrees from the standby state. The second vacuum valve is formed to a length that is turned on,
Wherein in accordance with the inclination of the switching member, the first vacuum valve and second sections power switching system in the ac electric railway you and performs blocking and closing operation of the vacuum valve. The middle section power supply switching system according to claim 1, wherein the rotating member rotates at a predetermined rotation speed .

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