JP5606749B2 - AC electric car - Google Patents

Description

The present invention relates to an AC electric vehicle.

In Japan, the pantograph is not raised or lowered while the vehicle is running, so the vehicle passes directly through the section where the conventional line section where the vehicle runs with one pantograph and the Shinkansen section where the vehicle runs with multiple pantographs. When traveling, the vehicle traveling method has been devised to cope with the switching of sections. For example, an AC electric vehicle as shown in FIG. In the AC electric vehicle of FIG. 11, a first pantograph 2a and a second pantograph 2b are connected to a train line 1 through which overhead power is passed, and the first pantograph 2a and the second pantograph 2b are special high-voltage power cables and the like. Connected with. The first pantograph 2a is connected to the first main circuit breaker 4a and the first transformer 6a, and the first transformer 6a is connected to the first power converter 7a and the first electric motor 8a. Further, on the side opposite to the first main circuit breaker 4a, the protective grounding device 3a and the grounding seat 10a are connected. The second pantograph 2b side is similarly configured.

The overhead line voltage from the train line 1 is stepped down by the first transformer 6a through the first pantograph 2a and the first main circuit breaker 4a, and is applied to the first power converter 7a. The first power conversion device 7a converts the stepped down voltage into a three-phase AC voltage, passes a three-phase AC current through the first motor 8a via the three-phase wire, and the first motor 8a is driven. When an excessive current occurs due to a failure or the like in the first power converter 7a or the first electric motor 8a, the first transformer 6a and the first power converter are opened by opening the first main circuit breaker 4a. The damage to the device 7a and the first electric motor 8a is suppressed, the power supply to the first transformer 6a and thereafter is stopped and opened, and the vehicle continues running. In an emergency where an accident occurs near the first pantograph 2a, when the protective grounding device 3a is turned on, the pantograph 2a comes into contact with the grounding seat 10a. When the pantograph 2a comes in contact with the grounding seat 10a, the substation detects an abnormality and stops the vehicle by stopping power transmission.

An AC electric vehicle having such a configuration stops at the station immediately before traveling in the section of the conventional line section, and lowers the pantograph 2 of either the first pantograph 2a or the second pantograph 2b. Corresponds to the section of the incoming line. In the Shinkansen, a section called a switching section is provided at a power transmission switching point from a different substation, and has a length that allows the entire traveling vehicle to be accommodated. For this reason, traveling corresponding to the switching of sections can be performed by passing through the switching section.

The conventional line supports the switching of power transmission by the above driving method, so even if there is no need to stop at the station due to passengers getting on and off, such as passenger trains, I had to stop at the station in front of the switching section and raise and lower the Pantograph 2. This kind of operation is an unnecessary stop, or the conventional line and the Shinkansen can be switched, and there is a problem that the maintenance and facilities are doubled . An AC electric vehicle that can directly drive the section has been proposed. FIG. 12 shows a configuration in which a fourth main circuit breaker 4e and a fifth main circuit breaker 4f are added to the circuit of FIG. The fourth main circuit breaker 4e is connected between the first pantograph 2a and the first main circuit breaker 4a. The fifth main circuit breaker 4f is connected between the second pantograph 2b and the second main circuit breaker 4b. For example, when the AC electric vehicle having such a configuration enters the section switching section from the first pantograph, the first main circuit breaker 4a, the second main circuit breaker 4b, the fourth main circuit breaker 4e, and From the state in which the fifth main circuit breaker 4f is turned on, the fourth main circuit breaker 4e is opened. When the fourth main circuit breaker 4e is opened, overhead power is supplied from the second pantograph 2b to the first power converter 7a through the fifth main circuit breaker 4f and the first main circuit breaker 4a. It is supplied to the second power converter 7b through the fifth main circuit breaker 4f and the second main circuit breaker 4b.

Similarly, even when a short circuit accident occurs in one of the first pantograph 2a and the second pantograph 2b, the driving force necessary for vehicle travel is maintained by opening / closing the four main circuit breakers. It becomes possible. For example, a first main circuit breaker 4a, a second main circuit breaker 4b, a fourth main circuit breaker 4e, and a fifth main circuit breaker 4f are turned on, via the first pantograph 2a and the second pantograph 2b. The case where the first electric pantograph 2a has caused a short-circuit accident when the AC electric vehicle is running with the supplied electric power will be described. When the fourth main circuit breaker 4e is opened, overhead power is supplied to the two power converters via the second pantograph (for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-69505

However, conventional AC electric vehicles can ensure redundancy in the event of a short-circuit accident, but because of the large number of large parts such as the main circuit breaker, the main circuit breaker is installed in the vehicle for protection or reduced maintenance. When trying to mount, there is a possibility that problems such as insufficient space and complicated wiring may occur.

The present invention has been made to solve the problems of redundancy and the number of parts, and an object of the present invention is to provide an AC electric vehicle that can handle different sections and can be directly operated.

  In order to solve the above, an AC electric vehicle according to the present invention includes a pantograph that collects electric power from a train line, a main circuit breaker that is connected to the pantograph and enables electrical disconnection, and the main circuit breaker. A transformer for connecting and reducing the voltage of the train line, a power converter connected to the transformer and converting the train line power to three-phase AC power, and driven by the three-phase AC power supplied from the power converter A protective earthing device and a grounding seat that are connected to the opposite side of the electric motor, the pantograph, and the main circuit breaker, and that ground the train line and stop power transmission from the substation in an emergency, the pantograph, the main circuit breaker, and the transformer The transformer, the power converter, the first circuit configured by the electric motor, the second circuit configured the same as the drive system, the first circuit and the second circuit of the transformer Primary side same It is characterized in that the connecting via the third circuit breaker.

According to the present invention, it is possible to provide an AC electric vehicle that can directly operate different sections, has redundancy, and can reduce the number of parts.

The circuit block diagram of the 1st Embodiment of this invention. The arrangement | positioning structure figure of the main circuit breaker of the 1st Embodiment of this invention. The circuit block diagram of the 2nd Embodiment of this invention. The circuit block diagram of the modification of the 2nd Embodiment of this invention. The operation | movement system figure of the modification of the 2nd Embodiment of this invention. The circuit block diagram of the 3rd Embodiment of this invention. The circuit block diagram of the 4th Embodiment of this invention. The circuit block diagram of the 5th Embodiment of this invention. The circuit block diagram of the modification of the 5th Embodiment of this invention. The circuit block diagram of the 6th Embodiment of this invention. The 1st circuit block diagram of conventional invention. The 1st circuit block diagram of conventional invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
The structure of this embodiment will be described. FIG. 1 shows a circuit configuration of the first embodiment. As shown in FIG. 1, the circuit of this embodiment includes a train line 1, a first pantograph 2a, a second pantograph 2b, a first protective grounding device 3a, a second protective grounding device 3b, and a first main cutoff. 4a, second main circuit breaker 4b, third main circuit breaker 4c, first lightning arrester 5a, second lightning arrester 5b, first transformer 6a, second transformer 6b, first power conversion Device 7a, second power converter 7b, first motor 8a, second motor 8b, first grounding seat 10a, second grounding seat 10b, third grounding device 10c, fourth grounding device 10d It is composed of and mounted on the vehicle.

A train line 1 that supplies overhead power from a substation to an AC electric vehicle is connected to a first pantograph 2a and a second pantograph 2b that transmit the overhead power from the train line 1 to the AC electric vehicle. The first pantograph 2a includes a first protective grounding device 3a for grounding the train line 1 in an emergency and stopping power transmission from the substation, and the first pantograph 2a via the first protective grounding device 3a. Is connected to the vehicle body via a first grounding seat 10a, and on the side opposite to the first grounding seat 10a, the first pantograph 2a is connected to the first main circuit breaker 4a enabling electrical disconnection. And the first main circuit breaker 4a for electrically disconnecting the first main circuit breaker 4a and thereafter, the first transformer 6a for stepping down the overhead wire voltage is connected. A wheel is rotated through a first power converter 7a that converts a single-phase alternating current stepped down by the first transformer 6a into a three-phase alternating current for driving the first electric motor 8a. A first electric motor 8a to be driven is connected. Connected between the first main circuit breaker 4a and the first transformer 6a is a first lightning arrester 5a which serves to protect the entire circuit when a very high voltage is applied. A third grounding device 10c is connected to the opposite side of the first main circuit breaker 4a.

From the second pantograph 2b, the second protective grounding device 3b, the second grounding seat 10b, the second main circuit breaker 4b, the second lightning arrester 5b, the second transformer 6b, and the second power conversion device 7b. The second electric motor 8b and the fourth grounding device 10d are connected in the same manner as the configuration from the first pantograph 2a.

The third main circuit breaker 4c is connected so as to connect between the first main circuit breaker 4a and the first transformer 6a and between the second main circuit breaker 4b and the second transformer 6b. .

In an AC electric vehicle having such a connection relationship, electric power sent from a substation is supplied from the train line 1 through the pantograph 2 into the circuit of the AC electric vehicle. For example, when the first pantograph 2a is in the on state, the first protective grounding device 3a is opened, and the overhead wire voltage from the first pantograph 2a passes through the first main circuit breaker 4a and the first transformer 6a. To be applied. The applied voltage is stepped down by the first transformer 6a and applied to the first power converter 7a. The first power conversion device 7a converts the applied AC voltage into a DC voltage, and further converts the DC voltage into a three-phase AC voltage that can be driven by the first motor 8a, to the first motor 8a. A three-phase alternating current is applied. The first electric motor 8 generates a rotating magnetic field by the flowing three-phase alternating current, and rotates using the rotating magnetic field as a driving force. The second pantograph 2b side has a similar action.

In the first grounding seat 10a, the first protective grounding device 3a is turned on in an emergency, and when the first grounding seat 10a is grounded to the train line 1, the substation detects an abnormality and transmits power from the substation. Stop. In addition, the first lightning arrester 5a is in an insulated state at a normal voltage, but becomes conductive when a very high voltage is applied in the AC circuit, such as a lightning falling on an overhead wire or a power transmission system. It discharges from the lightning arrester 5a and prevents the voltage in the circuit from rising. The grounding device 10c is a normal energization circuit, and grounds the return current passing through the first transformer 6a to the rail, and returns the electric power from the train line 1 to the substation. The second pantograph side also has a similar action.

The AC electric vehicle of the present embodiment having the above structure has the following operation. The first main circuit breaker 4a, the second main circuit breaker 4b, and the third main circuit breaker 4c are turned on and opened while both the first pantograph 2a and the second pantograph 2b are raised. Thus, current is collected by the first pantograph 2a or the second pantograph 2b. For example, when entering the conventional line section that collects current with one pantograph from the Shinkansen section that collects current with two pantographs 2, the main breaker 4 causes the pantograph 2 that enters the conventional line section first. By electrically disconnecting, the two running pantographs can be brought into contact with the train line 1 and the running vehicle can cope with the next section without straddling different sections. Therefore, there is no hindrance to the direct operation in the switching section, and power can be supplied to both the first transformer 6a and the second transformer 6b.

Next, the case where the first main circuit breaker 4a is opened and the second main circuit breaker 4b and the third main circuit breaker 4c are turned on when the vehicle is started will be described. In this case, the first main circuit breaker 4a is first opened and the second main circuit breaker 4b and the third main circuit breaker 4c are turned on. Direct operation is possible even in the section switching section without operating the main circuit breaker 4b and the third main circuit breaker 4c. The first pantograph 2a and the second pantograph 2a that are not used for current collection are always in an electrically open state when the first main circuit breaker 4a is in an open state. It is possible to travel in the section switching section while raising 2b from the departure. Further, even when it is necessary to lower the first pantograph 2a due to entry / exit or the like, it is possible to lower the first pantograph 2a without operating the first main circuit breaker 4a.

For example, when the first main circuit breaker 4a and the second main circuit breaker 4b are turned on and the third main circuit breaker 4c is opened, either the first pantograph 4a or the second pantograph 4b in the premises or the garage When it is necessary to collect electricity only in the case, the first main circuit breaker 4a is opened, the first pantograph 2a is lowered, and then the third main circuit breaker 4c is turned on. There is a need for more opening / closing operations. However, the first main circuit breaker 4a is opened as normal state, the second main circuit breaker 4b, is that you put the third main circuit breaker 4c, it corresponds to the supply state of the various power It becomes possible.

Such an AC electric vehicle having three main circuit breakers 4 is mounted on the section line 1 while the first pantograph 2a and the second pantograph 2b are in contact with the train line 1 regardless of the conventional line or the Shinkansen. Direct operation in the switching section is possible. Therefore, even when one of the two pantographs 2 is damaged or an unintentional descent occurs, the other pantograph 2 can have the function of one of the protective grounding devices 3. That is, it has a double system protective grounding function having both functions of the first protective grounding device 3a and the second protective grounding device 3b.

  FIG. 2 is an arrangement view of the main circuit breaker according to the first embodiment of the present invention from the ceiling direction. As shown in FIG. 2, this embodiment uses a vacuum circuit breaker (VCB) as the main circuit breaker 4, connects the pantograph and the main circuit breaker 4, and is mounted in the vehicle. Below, the arrangement | positioning method of the main circuit breaker 4 in a vehicle is demonstrated. The first main circuit breaker 4a has three end portions 36a, 36b and 36c, and two of the end portions 36a and 36b are a T-shaped cut-off portion 35a positioned in parallel, the cut-off portion 35a and the end portion. It is comprised by the control part 34a connected by the part 36c. The same applies to the second main circuit breaker 4b and the third main circuit breaker 4c. The end 36b and the end 36d are connected to the first transformer 6a, and the end 36e and the end 36g are connected to the second transformer 6b.

  A certain space in which the end 36a of the first main circuit breaker 4a and the end 36h of the second main circuit breaker 4b can prevent a short circuit between the first circuit breaker 4a and the second circuit breaker 4b. The end portion 36b of the first main circuit breaker 4a and the end portion 36g of the second main circuit breaker 4b are capable of preventing a short circuit between the first circuit breaker 4a and the second circuit breaker 4b. It is arranged to face each other through a certain space. In the third circuit breaker 4c, the end 36d of the third circuit breaker 4c is positioned in the vicinity of the end 36b of the first circuit breaker 4a, and the third circuit breaker 4c is in the vicinity of the end 36g of the second circuit breaker 4b. The circuit breaker 36e is located.

  By adopting such an arrangement method, the three main circuit breakers 4 can be arranged in a limited space in the vehicle while having a space for preventing a short circuit. By mounting the main circuit breaker 4 in the vehicle, it is possible to reduce the maintenance force on the main circuit breaker 4 because it is not soiled or damaged by external dust or the like. Further, the arrangement method includes the first main circuit breaker 4a, the wiring between the third main circuit breaker 4c and the first transformer 6a, and the second main circuit breaker 4b, the third main circuit breaker 4c and the first main circuit breaker 4a. The wiring between the two transformers 6b is not complicated. Therefore, it can be installed in a space-saving and simple manner, and it is considered to be an ideal method for mounting the main circuit breaker 4 in order to realize maintenance saving.

  The AC electric vehicle having the circuit configuration and structure as described above can be directly operated in the section switching section. Moreover, even if a short-circuit accident occurs near one pantograph 2, it is possible to maintain the operation of the power converter 7 by opening the corresponding pantograph 2 and to ensure redundancy. Further, by adopting an arrangement method in which the three main circuit breakers 4 can be installed in the vehicle, the complexity of the space and wiring can be eliminated, and the maintenance of the main circuit breaker 4 can be reduced.

Further, the circuit configuration of the present embodiment can be applied to an AC electric vehicle that does not use the transformer 6. Furthermore, it is possible to use a power source such as a heater or a blower instead of the electric motor 8 in the circuit configuration of the present embodiment.

(Second Embodiment)
A second embodiment according to the present invention will be described in detail with reference to the drawings. FIG. 3 is a circuit configuration diagram of the second embodiment of the present invention. In addition, about the thing which has the same structure as FIG. 1 thru | or 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

This embodiment is different from the first embodiment in that a first voltage detector 9a and a second voltage detector 9b are added to the circuit configuration. Hereinafter, this point will be described in detail.

As shown in FIG. 3, a first voltage detector 9a is provided on the tertiary side of the first transformer 6a. A second voltage detector 9b is provided on the tertiary side of the second transformer 6b.

When the vehicle is traveling, the first voltage detector 9a detects the voltage value on the tertiary side of the first transformer 6a. The second voltage detector 9b detects the voltage value on the tertiary side of the second transformer 6b. By connecting each voltage detector 9 to the tertiary side, the voltage value from the two pantographs 2 is detected as a low voltage circuit.

FIG. 4 is a circuit configuration diagram in which the safety device is attached to FIG. 3, and the safety device 26, the control power line 28, the first relay 29a, the second relay 29b, the third relay 29c, and the fourth relay 29d. A fifth relay 29e is additionally written. As shown in FIG. 4, the security device 26 is connected to the first main circuit breaker 4a via the first relay 29a, connected to the second main circuit breaker 4b via the second relay, It is connected to the third main circuit breaker 4c through the third relay 29c, is connected to the first voltage detector 9a through the fourth relay 29d, and is connected to the second voltage detection through the fifth relay 29e. Connected to the device 9b and also connected to an external device.

  The first relay 29a operates in conjunction with the open / closed state of the first main circuit breaker 4a. When the first main circuit breaker 4a is in an open state, the contact of the first relay 29a corresponding to the first main circuit breaker 4a is closed, and the "main circuit breaker" is directed from the first relay 29a to the security device 26. Open "signal is output. When the first main circuit breaker 4a is in the on state, the contact of the first relay 29a is opened, and the output of the “main circuit breaker open” signal from the first relay 29a to the safety device 26 is stopped. Is done. The interlocking operation state of the second relay 29b and the second main circuit breaker 4b and the interlocking operation state of the third relay 29c and the third main circuit breaker 29c are the first relay 29a and the first main circuit breaker. The same as 4a. The fourth relay 29d operates in conjunction with the open / closed state of the first circuit breaker 4a, and the fifth relay 29e operates in conjunction with the open / closed state of the second main circuit breaker 4b. When a certain voltage is detected by the first voltage detector 9a, the contact of the fourth relay 29d is closed, and the first synchronization signal is input to the security device 26. When the voltage is no longer detected by the first voltage detector 9b and the contact of the fourth relay 29d is opened, the input of the first synchronization signal to the security device 26 is stopped. The second voltage detector 9b and the fifth relay 29e also have the same operation as the first voltage detector 9a and the fourth relay 29d.

For example, as shown in the operation system diagram of FIG. 5, when the first voltage detector 9a or the second voltage detector 9b no longer detects a voltage due to some trouble or failure, the first synchronization to the security device 26 is performed. The input of the signal or the second synchronization signal is stopped (S1). Next, it is determined whether or not there is a main circuit breaker open signal input to the safety device 26 by opening the main circuit breaker 4 and closing the relay 29 (S2). When there is an open signal for the main circuit breaker, it is determined that there is power supply from the substation (S3), and the output of the emergency brake output stop signal is stopped (S4). Thus, the vehicle continues to travel (S5). If there is no main circuit breaker open signal, it is determined that the power supply from the substation is interrupted (S6), and an emergency brake output stop signal is output to the outside (S7). Therefore, the vehicle travel stops (S8).
A normal AC electric vehicle uses the presence or absence of a synchronization signal obtained from the first voltage detector 9a and the second voltage detector 9b as a determination signal for outputting an emergency brake signal. In the AC electric vehicle, the main circuit breaker 4b is not an interruption of power from the substation so that an unnecessary emergency brake is not applied to the vehicle even if the input of the synchronization signal from the voltage detector 9 to the safety device 26 is stopped. It is possible to input a signal (main circuit breaker open signal) indicating that the synchronization signal is stopped due to the open state to the security device 26.

Therefore, the AC electric vehicle having the configuration of the present embodiment has the same effect as that of the first embodiment, and can improve the safety of vehicle traveling by monitoring the voltage in the circuit. .

(Third embodiment)
A third embodiment according to the present invention will be described in detail with reference to the drawings. FIG. 6 is a circuit configuration diagram of the third embodiment of the present invention. In addition, about the thing which has the same structure as FIG. 1 thru | or 5, the same code | symbol is attached | subjected and description is abbreviate | omitted.

This embodiment is different from the second embodiment in that a first current detector 11a and a second current detector 11b are added to the circuit configuration. Hereinafter, this point will be described in detail.

  As shown in FIG. 6, the first current detector 11a is connected between the first pantograph 2a and the first main circuit breaker 4a. The second current detector 11b is connected between the second pantograph 2b and the second main circuit breaker 4b.

  The first current detector 11a detects a current flowing in the circuit from the first pantograph 2a. When the first circuit breaker 4a is in the on state, the current flowing in the circuit from the first pantograph 2a is detected. The second current detector 11b detects a current flowing in the circuit from the second pantograph 2b. When the second circuit breaker 2b is in the on state, the current flowing in the circuit from the second pantograph 2b is detected.

  The AC electric vehicle having such a configuration can detect a grounding accident occurring in the main circuit breaker 4 from the pantograph 2. Further, when one of the main circuit breakers 4 is opened, the total current value of the entire circuit can be detected by one current detector 11. Therefore, it has the same effect as the first embodiment, and it is possible to find a current abnormality in the circuit. Further, it is possible to have the second embodiment by combining with the second embodiment.

(Fourth embodiment)
A fourth embodiment according to the present invention will be described in detail with reference to the drawings. FIG. 7 is a circuit configuration diagram of the fourth embodiment of the present invention. In addition, about the thing which has the same structure as FIG. 1 thru | or 6, the same code | symbol is attached | subjected and description is abbreviate | omitted.

This embodiment differs from the third embodiment in the connection positions in the circuit of the first current detector 11a and the second current detector 11b. Hereinafter, this point will be described in detail.

As shown in FIG. 7, the third current detector 11c is connected between the first main circuit breaker 4a, the first lightning arrester 5a, and the first transformer 6a. The fourth current detector 11d is connected between the second main circuit breaker 4b, the second lightning arrester 5b, and the second transformer 6b.

  The third current detector 11c detects the current flowing from the first pantograph 2a to the first transformer 6a. For example, when the first main circuit breaker 4a and the second main circuit breaker 4b are in the on state and the third main circuit breaker 4c is in the open state, the first pantograph 2a to the first transformer 6a. The flowing current will be detected. Further, when the first main circuit breaker 4a is opened and the second main circuit breaker 4b and the third main circuit breaker 4c are turned on, the current flowing from the second pantograph 2b to the first transformer 6a Will be detected.

The fourth current detector 11b detects the current flowing from the second pantograph 2b to the second transformer 6b. For example, when the first main circuit breaker 4a and the second main circuit breaker 4b are in the on state and the third main circuit breaker 4c is in the open state, the second pantograph 2b changes to the second transformer 6b. The flowing current will be detected. When the first main circuit breaker 4a is opened and the second main circuit breaker 4b and the third main circuit breaker 4c are in the on state, the current flowing from the second pantograph 2b to the second transformer 6b Will be detected.

  The AC electric vehicle having such a configuration has the same effect as that of the first embodiment, and detects an electric current value flowing through the transformer 6, so that an excessive current that affects the power converter 7 is generated. It can be detected, and the safety of the circuit can be increased. It is also possible to combine with the second embodiment and the third embodiment.

(Fifth embodiment)
A fifth embodiment according to the present invention will be described in detail with reference to the drawings. FIG. 8 is a circuit configuration diagram of the fifth embodiment of the present invention. In addition, about the thing which has the same structure as FIG. 1 thru | or 7, the same sign is attached | subjected and description is abbreviate | omitted.

This embodiment is different from the fourth embodiment in that a first contactor 20a, a first input side contactor 24a, and a second input side contactor 24b are added to the circuit configuration, and the first power conversion device 7a is composed of the first AC power converter 15a and the first DC power converter 16a, and the second power converter 7b is composed of the second AC power converter 15b and the second DC power converter 16b. Is different. Hereinafter, this point will be described in detail.

  The first AC power conversion device 15a is connected to the first transformer 6a. The first DC power converter 16a is connected to the first AC power converter 15a. Between the 1st alternating current power converter 15a and the 1st direct current power converter 16a, the 1st positive electrode side contactor 24a is installed in the positive electrode side. Moreover, the 2nd positive electrode side contactor 24b is installed in the positive electrode side between the 2nd alternating current power converter device 15b and the 2nd direct current power converter device 16b.

The first contactor 20a connects between the first positive contactor 24a and the first AC power converter 16a, and between the second positive contactor 24b and the second AC power converter 16b. .

  Since the AC electric vehicle having such a configuration connects the DC sides of the first DC power converter 15a and the second DC power converter 15b via the first contactor 20a, Even when the circuit breaker 4a and the third main circuit breaker 4c are opened and the first positive electrode side contactor 24a is opened, the first DC power conversion device 16a and the first DC power conversion device 16b are connected to the second AC power conversion device 15b. It is possible to supply power to the second DC power converter 16b.

  For example, the first transformer 6a is for 20 kV, the second transformer 6b is for 25 kV, and the first pantograph 2a and the second pantograph 2b are connected to the train line 1 when the train line voltage is 20 kV. The first main circuit breaker 4a is turned on, and the second main circuit breaker 4b and the third main circuit breaker 4c are opened. The train line power supplied from the train line 1 through the first pantograph 2a, the first main circuit breaker 4a, and the first transformer 6a is converted into DC power by the first power converter 15a. The converted DC power is supplied to the first power conversion device 16a and the second power conversion device 16b, and the respective motors 8 are driven. In the section where the train line voltage is 25 kV, the first pantograph 2a and the second pantograph 2b are connected to the train line 1, the second main circuit breaker 4b is turned on, and the first main circuit breaker 4a and the third pantograph 2b are connected. The main circuit breaker 4c is opened. The train line power supplied from the train line 1 through the second pantograph 2b, the second main circuit breaker 4b, and the second transformer 6b is converted into DC power by the second power converter 15b. The converted DC power is supplied to the first DC power conversion device 16a and the second DC power conversion device 16b, and the respective motors 8 are driven.

  FIG. 9 is a modification of the fifth embodiment of the present invention, and a circuit configuration in which components of the second contactor 20b, the first contactor 25a, and the second contactor 25b are added to FIG. It has become. Between the first AC power converter 15a and the first DC power converter 16a, a first positive contactor 24a is installed on the positive electrode side, and a first negative electrode contactor 25a is installed on the negative electrode side. is set up. Between the second AC power converter 15b and the second DC power converter 16b, a second positive contactor 24b is installed on the positive electrode side, and a second negative electrode contactor 25b is installed on the negative electrode side. is set up. The second contactor 20b connects between the first negative electrode side contactor 25a and the first DC power converter 16a, and between the second negative electrode side contactor 25b and the second DC power converter 16b. ing. When the circuit device for the AC electric vehicle in FIG. 8 is distributed among a plurality of vehicles, the presence of a plurality of grounding points tends to cause rebalancing current imbalance and harmonic current stray. May be complicated. However, by using a circuit configuration in which the first positive electrode side contactor 25a, the second positive electrode side contactor 25b, and the second contactor 20b are added as shown in FIG. Current strays can be suppressed, answering devices can be distributed among a plurality of vehicles, and maintenance labor can be saved and wiring can be simplified.

  The AC electric vehicle having such a configuration has the same effect as that of the first embodiment, and can directly operate the section type switching section. It is also possible to combine with the second embodiment to the fourth embodiment. Moreover, although this embodiment showed the electric power feeding to the electric motor 8, it is applicable also as an electric power feeding system to the apparatuses which require the power supplies mounted in the inside of a vehicle, such as power supplies, such as a fan, and a service power supply to a passenger car. .

(Sixth embodiment)
A sixth embodiment according to the present invention will be described in detail with reference to the drawings. FIG. 10 is a circuit configuration diagram of the sixth embodiment of the present invention. In addition, about the thing which has the same structure as FIG. 1 thru | or 9, the same sign is attached | subjected and description is abbreviate | omitted.

  In this embodiment, as shown in FIG. 10, the train line 1, the first pantograph 2a, the second pantograph 2b, the first vehicle 31a, the second vehicle 31b, the first wheels 32a, 33a, the second Wheel 32b, 33b, coupler 34, first main circuit breaker 4a, second main circuit breaker 4b, and third main circuit breaker 4c.

  The 1st pantograph 2a is installed in the 1st vehicle 31a, and the 1st vehicle 31a is provided with the 1st wheel 32a and the 2nd wheel 32b. The second pantograph 2b is installed in the second vehicle 31b, and the second vehicle 31b includes a first wheel 33a and a second wheel 33b. The first vehicle 31 a and the second vehicle 31 b are connected by a connector 34. The connection state between the first main circuit breaker 4a, the second main circuit breaker 4b, and the third main circuit breaker 4c and the connection state with the pantograph 2 are the same as those in the first to fifth embodiments. is there.

  As shown in FIG. 10, the first pantograph 2a is installed outside the outer surface of the ceiling portion of the first vehicle 31a. Moreover, the 2nd pantograph 2b is installed in the inner side (connection side) of the ceiling part outer surface of the 2nd vehicle 31b.

  For example, as in the first embodiment, the first main circuit breaker 4a is opened, the second main circuit breaker 4b and the third main circuit breaker 4c are turned on, and the first vehicle 31a is the leading vehicle. In this case, when passing through the switching section of the Shinkansen, the position detection device on the track of the first wheel 32a indicates that the entire first vehicle 31a and the second vehicle 31b have entered the switching section. (Not shown) and the feeder circuit in the switching section is switched.

  The AC electric vehicle having such a configuration has the same effect as that of the first embodiment. Conventionally, if the arrangement distance between the two pantographs 2 is narrow, the pantograph 2 pushes up the train line 1, so that there is a possibility that one of the pantographs 2 is disconnected. If the first pantograph 2a is arranged outside the first vehicle 31a and the second pantograph 2b is arranged outside the second vehicle 31b in order to avoid such separation, the switching of the switching section section of the Shinkansen is detected. There was a problem that the pantograph 2 passed through the switching section before the wheels 32 and 33. If the pantograph 2 is arranged in the center of the vehicle 31 in order to avoid such a trouble, there is no space for installing the rooftop equipment, which causes a design problem. However, the AC electric vehicle configured as in the present embodiment can prevent the other pantograph 2 from being separated due to the push-up of the pantograph 2, and also interrupts the electrical connection of the first pantograph 2a. By doing so, it is possible to prevent a switching trouble when passing through the section, regardless of which of the first vehicle 31a and the second vehicle 31b is the leading vehicle. Moreover, since the pantograph 2 is installed at the end with respect to the vehicle 31, it is easy to secure a space for installing the rooftop equipment. Furthermore, by avoiding the installation of the electrically connected pantograph 2 above the crew member's head, the safety of the crew member is improved.

In addition, this embodiment can be used in combination with the second to fifth embodiments, and in that case, the effect of each embodiment is obtained.

1 Train Line 2 Pantograph 2a First Pantograph 2b Second Pantograph 3 Protective Earth Device 3a First Protective Earth Device 3b Second Protective Earth Device 4 Main Circuit Breaker 4a First Main Circuit Breaker 4b Second Main Circuit Breaker Device 4c Third main circuit breaker 4e Fourth main circuit breaker 4f Fifth main circuit breaker 5 Lightning arrester 5a First lightning arrester 5b Second lightning arrester 6 Transformer 6a First transformer 6b Second transformer 7 Power converter 7a First power converter 7b Second power converter 8 Motor 8a First motor 8b Second motor 9 Voltage detector 9a First voltage detector 9b Second voltage detector 10 Grounding device 10a First grounding seat 10b Second grounding seat 10c Third grounding device 10d Fourth grounding device 11 Current detector 11a First current detector 11b Second current detector 11c Third current detector 11d Fourth current detection AC power converter 15a AC power converter 15b AC power converter 16 DC power converter 16a DC power converter 16b DC power converter 17 Lightning arrester 18 Current transformer 19 Current detector 20 Contactor 20a First contactor 20b Second contactor 23 Power conversion device 24 Positive electrode side contactor 24a First positive electrode side contactor 24b Second positive electrode side contactor 25 Negative electrode side contactor 25a First negative electrode side contactor 25b Second negative electrode side Contactor 26 Safety device 28 Control power line 29 Relay 29c Third relay 29d Fourth relay 29e Fifth relay 31 Vehicle 31a First vehicle 31b Second vehicle 32a First wheel 32b Second wheel 33a Second One wheel 33b second wheel 34 coupler

Claims (8)

A pantograph that collects train line power from the train line,
A main circuit breaker connected to the pantograph and capable of being electrically disconnected; and a transformer connected to the main circuit breaker to step down the voltage of the train line;
A power converter for connecting to the transformer and converting electric power of the train line to three-phase AC power;
A motor driven by the three-phase AC power supplied from the power converter and one end connected to the pantograph and the other end connected to a grounding seat, grounding the train line in an emergency and protecting power transmission from the substation A grounding device;
A first circuit composed of the pantograph, the main circuit breaker, the transformer, the power converter, and the electric motor;
A second circuit configured identically to the first circuit;
A third circuit breaker connecting the first circuit and the second circuit between the primary sides of the transformer;
When the pantograph can be used, the main circuit breaker of the first circuit is opened, the main circuit breaker and the third circuit breaker are turned on the second circuit, so that the pantograph and the train Direct operation of different sections is possible while maintaining line contact, and if either the pantograph of the first circuit or the pantograph of the second circuit fails due to an accident or the like, the faulty side By supplying the protective grounding device and opening the main circuit breaker, power is supplied to the power converter through the pantograph and the main circuit breaker on the non-failed side. AC electric car. In the first circuit and the second circuit,
A first lightning arrester connected between a first pantograph of the first circuit and a first transformer;
A first main circuit breaker connected between the first lightning arrester and the first pantograph;
A second lightning arrester connected between a second pantograph of the second circuit and a second transformer;
A second main circuit breaker connected between the second lightning arrester and the second pantograph;
A third main circuit breaker connecting between the first main circuit breaker and the first transformer, and between the second main circuit breaker and the second transformer;
First power connected to the first transformer by charging the third main circuit breaker and collecting current from either the first pantograph or the second pantograph through a train line 2. The AC electric vehicle according to claim 1, wherein electric power is supplied to a converter and a second power converter connected to the second transformer. In the second circuit and the first circuit, according to claim 1 or claim 2 AC electric vehicle according to characterized in that a voltage detector to the tertiary side of the transformer.   In the main circuit breaker of the first circuit, the main circuit breaker of the second circuit, and the third main circuit breaker, from the voltage detector of the first circuit and the voltage detector of the second circuit Based on an input signal and input signals from the main circuit breaker of the first circuit, the main circuit breaker of the second circuit, and the third main circuit breaker, the first circuit and the second circuit The power supply to the circuit was stopped by being electrically disconnected by the opening operation of the main circuit breaker of the first circuit, the main circuit breaker of the second circuit, and the third main circuit breaker The AC electric vehicle according to claim 3, further comprising a safety device that determines whether to output an emergency brake stop signal. Wherein the first circuit and the second circuit, AC electric vehicle according to any one of claims 1 to 4, characterized in that a current detector between the main circuit breaker and the pantograph. The AC electric vehicle according to any one of claims 1 to 5 , wherein a current detector is provided between the main circuit breaker and the transformer in the first circuit and the second circuit. . In the first circuit and the second circuit, the power conversion device includes an AC power conversion device and a DC power conversion device, and a positive electrode side contactor is connected between the AC power conversion device and the DC power conversion device. The negative electrode side is connected via a negative electrode side contactor, and the positive electrode side contact between the positive electrode side contactor of the first circuit and the DC power converter, and the positive electrode side contact of the second circuit. And the DC power converter are connected via a first contactor, the negative contactor of the first circuit and the DC power converter, and the negative contactor of the second circuit. The AC electric vehicle according to any one of claims 1 to 6 , wherein the DC power converter is connected via a second contactor. It said pantograph pantograph and the second circuit of the first circuit, any one of claims 1 to 7, characterized in that it is installed at the ends of the ceiling portion of the two vehicles are connected AC electric vehicle according to.

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