JP2002058110A - Power facility for bullet train - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with use of large-scaled changeover facilities for conducting automatic changeover of power source which is necessary in power facilities for super-express railways, when an electric rolling stock passes over a dead section. SOLUTION: On the electric rolling stock, an energy storage apparatus which has an electric double-layer capacitor to be used as a DC power source, and a current control circuit for controlling its charging and discharging, is mounted. This energy storage apparatus performs charging with power received through a pantograph, when the electric rolling stock is operated normally and supplies power necessary for the electric rolling stock by discharging to the DC circuit of an inverter, while the electrical rolling stock passes a middle section. By determining the distance of the middle section to be 400 mm while having an allowance α, slightly in addition to the maximum distance (300 mm) between pantographs of bullet train cars, time during which power is supplied from the energy storage apparatus, while the electric rolling stock runs through the middle section is reduced to a necessary minimum, and a power capacity necessary for the energy storage apparatus is minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system for a Shinkansen, and more particularly to a power supply system for securing a power supply when an electric vehicle passes through a dead section that separates different power supplies.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a railway power supply system and a section configuration. As shown in (a) of FIG.
Substations 1 _1, 1 ₂ from feeding circuit breaker 2 ₁ becomes different power,
2 ₂ baked wire, the trolley wire 3 separated by a dead section through a section switch pressurized. The electric car 4 which is composed of a plurality of vehicles receives electric power from a trolley wire through one or a plurality of pantographs, and supplies electric power from a power supply circuit in the electric car to a driving motor, lighting, an air conditioner, and the like.

In such power supply equipment for railways, the dead section separates different power supply sections, and in the power supply equipment for Shinkansen, as shown in FIG. Equipped with sections.
On the Shinkansen, the pantographs of the leading and trailing vehicles are connected by buses (cables), and the switching section is provided with an air section D provided at a distance (generally 1000 m) that is longer than the maximum pantograph interval of the vehicles.
1 and D2 as the middle section, and the air section D1
Switch S controlled to open and close between both ends of D2 and the middle section
W1 and SW2 are provided.

With this configuration, the switch SW1 is closed and the switch SW is closed until all the vehicles reach the middle section range.
2 keeps supplying power to the middle section from the power supply on the side of the switch SW1, and switches the switch SW2 by opening the switch SW1 and closing the switch SW2 while all vehicles are traveling in the middle section. Start supplying power to the middle section from the side power supply. As a result, although there is an instantaneous power failure when the switch is switched, continuous power supply is performed, and the driver of the Shinkansen can run the air section in the notch-on state without being conscious of passing through the different power supply section.

[0005]

The conventional Shinkansen power supply equipment requires switching equipment to be installed at substations and feeder sections, which increases equipment costs. In addition, the length of the middle section is 1 because the power supply is switched according to the running of the vehicle.
000m or more is required, and switching equipment costs increase. Also,
In order to improve the running speed of the vehicle, it is necessary to take measures such as changing the distance of the middle section. In addition, when the power is switched in the middle section, an instantaneous power failure of 250 ms to 350 ms occurs, and the switch automatically repeats on and off, which affects the life of the equipment. In addition, the switching equipment is repeatedly switched in and out each time a vehicle passes, and is frequently opened and closed. Therefore, it is necessary to periodically maintain the equipment, which increases running costs. Further, since the switching equipment is a frequent opening / closing equipment, there are many failures, which often cause trouble in the operation plan of the vehicle.

An object of the present invention is to provide a Shinkansen power supply system which solves the above-mentioned problems.

[0007]

According to the present invention, in order to solve the above-mentioned problems, the middle section is a distance having a margin to the maximum pantograph interval of the vehicle, and is provided with only dead sections at both ends. The electric vehicle is equipped with an energy storage device such as an electric double layer capacitor capable of rapid charging and discharging. When the electric vehicle passes through the middle section, it is necessary to drive the electric vehicle from the energy storage device. By making it possible to supply electric power, the switching equipment can be simplified as the power supply equipment, and the power capacity required for the energy storage device is minimized.

The electric vehicle is supplied with power from a trolley wire in which a different power source is separated by the dead section, and the dead section is constituted by a pair of dead sections and a middle section which is not pressurized between the pair of dead sections. The electric vehicle is equipped with a power supply circuit for supplying power to a traveling motor or the like by receiving power from a trolley wire, and an energy storage device capable of charging and discharging DC power between the power supply circuit and the electric vehicle. Power supply equipment for the Shinkansen that supplies electric power to the electric vehicles traveling in the range from the trolley wire and supplies electric power required for the electric vehicles from the energy storage device mounted on the electric vehicle to the electric vehicles traveling in the middle section. , Wherein the distance of the middle section is a distance having a small margin to the maximum pantograph interval of the electric vehicle.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a power supply circuit of an electric vehicle for an AC railway showing an embodiment of the present invention. Power is drawn from the trolley wire to the primary side of the main transformer 14 through the pantograph 11, the vacuum circuit breaker 12 and the lightning arrester 13.

On the secondary side of the main transformer 14, the converter 1
5 ₁ and the driving inverter 15 ₂ and the regenerative inverter 1
The main converter is provided comprising a 5 _3, it regenerates a driving current of frequency controlled induction motor 16 from the inverter 15 ₂ supply, and the regenerative power to the main transformer 14 side. Main transformer 1
The secondary side of the 4, is connected to the main converter 17 _{1-17 3} adjacent the vehicle through the circuit breaker, for driving and regenerative braking of the induction motor 18. Reference numeral 19 denotes an auxiliary circuit for obtaining power for lighting equipment, air conditioning equipment, mechanical brake compressors, and the like.

In this embodiment, each driving vehicle is equipped with an electric double layer capacitor serving as a DC power supply and energy storage devices 20 and 21 having a current control circuit capable of controlling charging and discharging. This energy storage device 2
Reference numerals 0 and 21 are provided in parallel with a DC circuit of the main converter, that is, a connection point between the converters 15 ₁ and 17 ₁ and the inverters 15 ₂ and 17 ₂ , so that DC power can be charged and discharged between the power supply circuit of the electric vehicle. To do.

The electric double layer capacitors of the energy storage devices 20 and 21 are capable of rapid charging and discharging, and have a remarkably high number of repetitions of charging and discharging as compared with ordinary storage battery equipment. The current control circuit detects the received voltage from the pantograph and forms a discharge path from the electric double layer capacitor to a DC circuit such as an inverter when the voltage drops below a set value. Circuits (circuit connection switches and step-up / step-down chopper circuits) are provided.

With the above configuration, in the normal state when power can be received through the pantograph 11, the energy storage device 20,
21 previously charged to the rated voltage at the main transformer 14, through the converter 15 _1, 17 ₁ DC power. When the power supply equipment such as a trolley wire is interrupted or the contact between the trolley wire and the pantograph is broken (wire breakage phenomenon), or when the electric vehicle is in a running state passing through a dead section, the motor 1
The power supply necessary for driving 6, 18 is supplied to energy storage device 2
The DC power supplies 0 and 21 are converted into AC power by the inverters 15 ₂ and 17 ₂ to supply necessary electric power to the motors 16 and 18.

In addition, the energy storage devices 20 and 21 are directly
Power supply and regenerative inverter 15 _Three, 17_ThreeWith AC power
To enable power supply to the auxiliary circuit 19 and the like.

FIG. 2 shows a case where a Shinkansen vehicle passes through a dead section.
W1, SW2 and its opening / closing control device are omitted, and a margin α (20) is set for the maximum pantograph interval (about 300 m) of the vehicle.
In this case, only a pair of air sections are provided at a distance (approximately 400 meters) to which an air section is added, and a middle section therebetween is a non-pressurized section.

In this configuration, the shinkansen is connected to the pantograph between the leading vehicle and the trailing vehicle by a cable through a bus, and the trolley wire is pressurized in a running state in which some of the pantographs are in the middle section position. Power can be received from the pantograph that comes in contact with the vehicle.
Then, in a power cutoff state where all the pantographs are in the middle section, power can be supplied from the energy storage device mounted on the vehicle to the main converter and the like, and the power running operation can be continued.

In particular, the distance of the middle section needs a time to supply power from the energy storage devices 20 and 21 while traveling in the middle section in order to allow the maximum pantograph interval of the Shinkansen vehicle to have some margin. Can be minimized. For example, the distance of the middle section is 400m
Assuming that the maximum pantograph interval is 300 m and the traveling speed is 250 km / h, the time required to pass 100 m is about 1.44 seconds, and it is sufficient that the energy storage device can supply power for this time.

Therefore, the energy storage device can minimize its required electric power capacity, is economical, and can be downsized without a significant change in the basic structure of an existing vehicle. it can. Also, since the distance in the middle section is minimized, there are more choices of where to install it,
Restrictions on equipment locations are eased.

Furthermore, compared with the conventional method, the switching equipment does not require a switch and its control device, and is greatly simplified, so that its reliability is improved, cost is reduced, maintenance costs are reduced, and the equipment life is extended. Can be. Also, when increasing the running speed of the vehicle, it is not necessary to change the distance of the middle section.

Further, in an electric vehicle equipped with an energy storage device, a voltage change of a trolley wire can be suppressed by the energy storage device when the electric vehicle starts running or regenerating. From the viewpoint of the equipment, the electric vehicle itself is less likely to cause a load variation, and the responsibilities of the power supply equipment can be reduced, thereby simplifying the power supply equipment and reducing the cost.

Furthermore, an electric vehicle equipped with an energy storage device can be used as an emergency DC power source for electric vehicles at night or during a power outage at a substation while traveling in a tunnel or underground.

In the above embodiment, instead of the electric double layer capacitor, an energy storage device using a storage battery or the like as a DC power source can be mounted on the electric vehicle to obtain the same operation and effect.

[0023]

As described above, according to the present invention, the electric vehicle for the Shinkansen is equipped with an energy storage device capable of rapid charging and discharging such as an electric double layer capacitor, and when the electric vehicle passes through the middle section, the energy is stored. Since the electric power required for running the electric car or the like can be supplied from the storage device, the switching equipment can be simplified as the power supply equipment.

In particular, since the distance of the middle section is made to have a small margin to the maximum pantograph interval of the Shinkansen, the equipment efficiency of the electric vehicle and the power supply equipment can be improved, such as miniaturization of the energy storage device. .

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a power supply circuit of an electric vehicle according to an embodiment of the present invention.

FIG. 2 is a view showing a passage manner of a dead section in the embodiment.

FIG. 3 is a configuration example of a power supply facility for a railway and a dead section.

[Explanation of symbols]

11 ... pantograph 14 ... main transformer 15 _1, 17 ₁ ... converter 15 _2, 17 ₂ ... driving inverter 15 _3, 17 ₃ ... regenerative inverter 16, 18 ... induction motor 19 ... auxiliary circuits 20 and 21 ... energy storage device

Claims (1)

[Claims] 1. An electric vehicle is supplied with power from a trolley wire in which a different power source is separated by a dead section. The dead section is constituted by a pair of dead sections and a middle section in which no pressure is applied between the pair of dead sections. The electric vehicle includes a power supply circuit that supplies power to a traveling motor or the like by receiving power from a trolley wire, and an energy storage device that can charge and discharge DC power between the power supply circuit and the power supply circuit. Electric vehicles traveling in areas other than the section are supplied with electric power from a trolley line, and electric vehicles traveling in the middle section are used for a bullet train that supplies necessary electric power to the electric vehicle from an energy storage device mounted on the electric vehicle. In the power supply equipment, the distance of the middle section is a distance having a margin with a maximum pantograph interval of the electric vehicle. Power supply equipment for the Shinkansen.