JP2001145201A - Electric railway vehicle control power supply system - Google Patents

Abstract

(57) [Abstract] [Problem] Even if an overhead line power outage occurs, an electric railway vehicle control that can quickly supply power to a DC load and quickly resume train operation after power restoration of the overhead line. The aim is to obtain a power supply system. SOLUTION: In addition to a circuit for charging a secondary battery power storage device 5 by a charging device 1 and supplying power to a DC load 14, a charging device 2 charges a capacitor power storage device 12 and the voltage thereof is converted by a DC / DC converter 13. Controlled DC load 14
And a circuit for supplying power to the power supply. Then, when the overhead line loses power for a long time and the power is restored after reaching the discharge voltage limit value of the secondary battery power storage device 5, the capacitor power storage device 12 is rapidly charged by the charging device 2 and the DC / DC converter 13 The controlled constant voltage is supplied to the DC load 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle which runs on electric power supplied from a feeder, and which has a charging device and supplies power to a control device with the electric power charged to the charging device. It is about.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram showing a conventional power supply system for controlling electric railway vehicles in an electric vehicle of, for example, a DC feed type. In the figure, reference numeral 1 denotes an overhead wire serving as a feeder, which is rated D when supplied from an electric railway substation (not shown).
A voltage of C1500V is applied. Reference numeral 2 denotes a pantograph, and reference numeral 3 denotes an inverter that converts DC 1500 V from the overhead line 1 into an AC power supply (usually, AC 440 V) and supplies the AC power supply including an illumination power supply and various control devices.

Some of the on-vehicle control devices operate for a certain period of time (for example, about one hour) even if power supply from the pantograph 2 is cut off due to an overhead line accident or a power failure of a feeder line in order to ensure driving safety. For example, there are DC loads such as the train radio device 6, the driving safety device 7, the brake control device 8, and the like. The charging device 4 and the secondary battery power storage device 5 are provided to supply a more stable power supply to the control device requiring the above-described measures against power failure. The secondary battery power storage device 5 is charged, and a DC power supply (normally, DC 100 V) is supplied from the charged secondary battery power storage device 5 to the train radio device 6, the operation safety device 7, the brake control device 8, and the like.

[0004]

The conventional electric railway vehicle control power supply system is configured as described above. Even if the power supply from the overhead line is cut off, the control device required for ensuring the above-mentioned safety is provided. Power is supplied from the secondary battery power storage device to continue its function. Then, when power supply from the overhead line is restored, the secondary battery power storage device starts a charging operation again, the train returns to a normal state, and operation can be resumed.

[0005] However, for some reason, the power outage time until the power is restored from the overhead line becomes long, and the discharge voltage of the secondary battery power storage device reaches its limit value (the minimum operating voltage at which the DC load during operation can maintain its operation is the lowest). (Equivalent), the DC load stops operating, and in order to restart it, it is necessary to restore the voltage of the secondary battery power storage device to the minimum starting voltage higher than the minimum operating voltage. Here, the following serious problem may occur due to the limitation of the charging capacity of the secondary battery power storage device. That is, among these DC loads, the driving safety device (ATS, ATC, etc.) and the brake control device have a so-called fail-safe function, and when the power is cut off, it works on the side where the braking device operates,
In particular, the emergency brake system does not relieve until power is turned on again. In order to charge the secondary battery power storage device whose discharge voltage has reached the limit value to a level at which the DC load can be restarted, at least 1 to 3
Approximate time is required.

[0006] Therefore, if an overhead line power outage accident occurs while the train is running, the train will be stopped immediately at the site, but this power outage will last for about one hour or more and the discharge voltage of the secondary battery power storage device will be reduced. When the limit value is reached, the braking device remains activated, even if the overhead line recovers power shortly thereafter, the train will not start, and even if a rescue vehicle arrives, it will not be possible to tow the train. It becomes possible, and recovery from the accident must wait for the completion of the charging operation for a long time thereafter. Therefore, the train schedule is greatly confused. The present invention has been made in order to solve the above problems, and even if a long-time overhead power failure occurs, after the overhead power is restored, power is immediately supplied to the DC load to operate the train. It is an object of the present invention to provide an electric railway vehicle control power supply system capable of hastening resumption.

[0007]

An electric railway vehicle control power supply system according to the present invention converts a power supplied from a feeder cable to output a charging current, and a first charging device. An electric railway vehicle control power supply system comprising a secondary battery storage device charged by a charging current from the secondary battery storage device and supplying power to the DC load from the secondary battery storage device, by converting power supplied from the feeder cable A second charging device that outputs a charging current, a capacitor power storage device including a capacitor that is charged by the charging current from the second charging device, and a voltage of the capacitor power storage device that is a predetermined voltage required for the DC load. When the power supply from the feeder cable is stopped, by controlling the output voltage of the power conversion device, the power storage device Serial DC load to provide power, after the discharge capacity of the capacitor power storage device reaches a limit value supplies power to the DC load from the secondary battery electric power storage device,
When the power supply from the feeder returns after the discharge voltage of the secondary battery power storage device reaches the limit value, the connection between the secondary battery power storage device and the DC load is disconnected and the charging operation of the first charging device is performed. And controlling the output voltage of the power converter to supply power from the capacitor power storage device to the DC load.

Further, in the electric railway vehicle control power supply system according to the present invention, the capacity of the second charging device is set to the capacity of the DC load, and the chargeable / dischargeable capacity of the capacitor is temporarily generated during operation of the vehicle. This is set to a capacity necessary for maintaining the power supply to the DC load during the period of the instantaneous power failure, which is a temporary power failure.

Further, an electric railway vehicle control power supply system according to the present invention includes a second charging device capable of converting power supplied from a feeder cable and supplying power to a DC load, and supplying power from the feeder cable. When the power supply from the feeder cable is restored after the discharge voltage of the secondary battery power storage device has reached a limit value, power is supplied from the secondary battery power storage device to the DC load. The connection between the battery storage device and the DC load is disconnected, the charging operation of the first charging device is restarted, and power is supplied from the second charging device to the DC load.

Further, in the electric railway vehicle control power supply system according to the present invention, a diode is inserted into the output terminal of the secondary battery power storage device, power supply from the feeder is stopped, and the discharge voltage of the secondary battery power storage device is reduced. When the power supply from the feeder returns after the limit value is reached, the diode automatically disconnects the connection between the secondary battery power storage device and the DC load, and the secondary charging device sends the secondary battery power from the secondary charging device side. This prevents current from flowing into the battery storage device.

Further, the electric railway vehicle control power supply system according to the present invention has a first and a second power supply system in a case where power is supplied from the feeder and the voltage of the secondary battery power storage device is at a level capable of supplying a DC load. The output of the second charging device or the power conversion device is controlled so that power is supplied from both charging devices to the DC load.

Further, the electric railway vehicle control power supply system according to the present invention converts a power supplied from a feeder cable to output a charging current, and uses the charging current from the second charging device. A capacitor power storage device comprising a capacitor to be charged, and a power conversion device for converting the voltage of the capacitor power storage device to a predetermined voltage required for a DC load, wherein the DC load is temporarily generated during operation of the vehicle. Power supply is only required to be maintained during the momentary power outage that is a sudden power outage, and the power outage countermeasure load is divided into other power outage countermeasure loads.Power is supplied from the secondary battery power storage device to the power outage countermeasure load, The power is supplied from the power converter to the momentary power failure countermeasure load.

Further, an electric railway vehicle control power supply system according to the present invention converts a power supplied from a feeder cable to output a charging current, and a charging current from the second charging device. And a momentary power failure countermeasure load that requires only maintenance of power supply during a momentary power failure, which is a temporary power failure that occurs during operation of the vehicle. In addition, power is supplied from the secondary battery power storage device to the load for preventing power failure, and power is supplied from the capacitor power storage device to the load for preventing momentary power failure.

Further, in the electric railway vehicle control power supply system according to the present invention, the capacity of the second charging device is set to the capacity of the load for preventing instantaneous power failure, and the chargeable / dischargeable capacity of the capacitor during the period of the instantaneous power failure is set. The capacity is set to the capacity required to maintain the power supply to the instantaneous power failure countermeasure load.

Further, an electric railway vehicle control power supply system according to the present invention converts a power supplied from a feeder cable to output a charging current, and a secondary device charged by the charging current from the charging device. Equipped with a battery storage device,
An electric railway vehicle control power supply system for supplying power to a DC load from the secondary battery power storage device, comprising: a charging / discharging device that opens and closes a connection between the charging device and the DC load and the secondary battery power storage device; When the power supply from the electric wire exists, the switchgear is closed, the power supply from the feeder cable is stopped, and the power supply from the feeder cable is restored after the discharge voltage of the secondary battery power storage device reaches a limit value. In this case, the switching device is opened, and power is supplied from the charging device to the DC load.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram showing an electric railway vehicle control power supply system according to Embodiment 1 of the present invention. Note that a portion that generates AC 440 V by converting the power from the overhead line with an inverter is the same as that of the related art in FIG. In the figure, reference numeral 10 denotes a first charging device 1, which is a conventional charging device 4;
In order to charge the secondary battery power storage device 5, the AC power supply 440 V is DC-smoothed to output a charging current, and the output voltage is fed back to perform voltage control up to DC 100 V.

Reference numeral 11 denotes a second charging device 2 for charging a capacitor power storage device 12 described later.
C440V is subjected to DC smoothing, and a charging current is output to DC100V by current control. Reference numeral 12 denotes a capacitor power storage device configured by connecting a large number of electric double-layer capacitor elements in series and parallel in a predetermined number, for example, and can be rapidly charged by the charging device 2. Reference numeral 13 denotes a DC / DC converter as a power converter that feeds back its output voltage and converts the voltage of the capacitor power storage device 12 into a voltage required for a DC load. 1
Reference numeral 4 denotes a DC load requiring a power failure countermeasure in a broad sense, and includes a train radio device, a driving safety device, a brake control device, and the like described in the related art.
.., N. The switches S1, S2, S3,... Sn are inserted for each load device, and the switches SW1, SW2 are inserted between the portion where the DC load 14 is integrated and each of the two power storage devices 5, 12. These switches normally employ no-fuse breakers.

Next, the operation will be described with reference to the timing chart of FIG. 2, a) is a chart of the output voltage and load current of the secondary battery power storage device 5, b) is a chart of the output voltage and load current of the DC / DC converter 13 on the capacitor power storage device 12 side, and c). ) Shows a chart of the output voltage and the load current at the load end, respectively. First, power is normally supplied from the overhead line until time t1, and in this state, both the switches SW1 and SW2 are normally closed, and power is supplied to the DC load 14 from both power storage devices. Although FIG. 2 shows that power is mainly supplied from the secondary battery power storage device 5, the load sharing between the two can be freely performed by controlling the output voltage of the DC / DC converter 13 in consideration of the internal resistance between the two. Can be set to

Next, when a power failure occurs at time t1, that is, when the power supply from the overhead line is cut off, the load current from the secondary battery power storage device 5 decreases with time as the voltage of the secondary battery drops. . The DC / DC converter 13 of the capacitor power storage device 12 increases the shared current in order to keep the load voltage constant, and the DC load 14 until the time t2 that has elapsed by the time determined by the stored power of the capacitor power storage device 12.
, A stable power can be supplied at a constant voltage of DC 100V. Therefore, until time t2, the secondary battery power storage device 5
Is maintained at a constant voltage of DC 100V. After time t2, the DC / DC converter 13 automatically stops outputting because the capacitor power storage device 12 has no discharge capability. For this reason, after the output voltage of the secondary battery power storage device 5 slightly discontinuously decreases, both the voltage and the current decrease with the attenuation characteristic determined by the discharge capacity and the load amount.

At time t3, when the voltage drop of the secondary battery power storage device 5 becomes large and the minimum operating voltage of the DC load 14, which is the limit value, cannot be maintained, this is detected by a low voltage detector (not shown). Stop supplying power. In the case of a normal power failure, the power supply from the overhead line is resumed by this time t3 (about one hour as the power failure time), charging from the charging device 1 is restarted, and normal recovery is possible. The present invention solves the problem in the case where the power failure continues beyond the time t3, the DC load is stopped, and a supply of the minimum starting voltage higher than the limit value is required for restarting the DC load. This has been done for the sake of clarity, and the following description will be continued.

After time t3, the switches SW1 and SW2 are kept open. When the power supply from the overhead line is restored at time t4, the charging of the capacitor power storage device 12 by the charging device 2 is completed in a short time by time t5. Closed to supply power from DC / DC converter 13 to DC load 14. Here, the time required for charging the capacitor power storage device 12 (equivalent to t5 to t4) will be described later in a specific calculation example. The time required for recharging after the discharge voltage of the device 5 reaches the limit value is greatly reduced as compared with about 1 to 3 hours, and the train can resume its operation at this time t5. It should be noted that the DC / DC converter 13 is provided before the completion of the charging operation of the capacitor power storage device 12.
Can be operated to output a constant voltage to the DC load 14, in which case the time t5 can be further advanced.

After the time t5, until the time t6 when the charging operation of the secondary battery power storage device 5 is completed, the switch SW1
Is open, the supply of power to the DC load 14 is performed by the charging device 2, the capacitor power storage device 12,
/ DC converter 13 and DC / D
The output of C converter 13 does not flow into secondary battery power storage device 5, and secondary battery power storage device 5 is charged by charging device 1.

When charging of the secondary battery power storage device 5 is completed,
At time t6, the switch SW1 is closed, and power is supplied to the DC load 14 from the secondary battery power storage device 5. It should be noted that after time t6, the power supply to DC load 14 can be shared between secondary battery power storage device 5 and capacitor power storage device 12 by controlling the output voltage of DC / DC converter 13. As described above.

Here, the required capacity of the charging device 2 and the capacitor power storage device 12 will be examined. First, as described with reference to FIG. 2, after the occurrence of the power failure (time t1), the capacitor power storage device 12 loses its discharge capability at a relatively short time t2. By the way, this capacitor power storage device 1
The required power supply continuation time (t
3-t1 = about 1 hour) may be covered only by the capacitor power storage device 12. At present, however, the storage capacity per unit volume (1 liter (L)) of the electric double layer capacitor is usually 10 Wh / L. On the contrary,
The secondary battery has a large difference of about 40 to 60 Wh / L, and configuring a long-term power outage countermeasure power supply using only a capacitor power storage device requires an extremely large volume, and is structurally and economically expensive. Disadvantageous.

Therefore, in the present invention, first, the charging device 2
Is equivalent to the capacity of the DC load 14. The chargeable / dischargeable capacity of the capacitor power storage device 12 is determined by the power supply period only from the capacitor power storage device 12 side (corresponding to the period from time t5 to time t6 in FIG. 2). The capacity is set in consideration of the instantaneous stop at. In other words, although the feeder system is normal, there is a break in the overhead line and the pantograph that occurs while the train is running, and there is no voltage applied to the overhead line. Set to the capacity required to achieve the maintenance of power supply during the period.

For example, the capacity of the DC load 14 is
Assuming that the required capacity of the capacitor power storage device 12 is 5 KW in V and the maximum value during the instantaneous period is 10 seconds, DC / DC
The input voltage range of the converter 13 is from 100 V DC to DC
Assuming up to 50V, about 800F (1,111Wh)
Thus, a relatively small capacity is sufficient, and it is possible to realize the structure within an appropriate range economically and economically. In addition, the capacitor power storage device 12 of this capacity is
A (= 5KW / 100V) When charging with a constant current, 8
It takes 00 seconds (= 13.3 minutes corresponding to the time from time t4 to time t5 in FIG. 2), but the charging time of the secondary battery power storage device 5 (1 to 3 hours from time t4 to time t6 in FIG. 2). ), And as described above, it is possible to realize the early restart of the vehicle after the power is restored after a long-term power failure.

Embodiment 2 FIG. FIG. 3 is a configuration diagram showing an electric railway vehicle control power supply system according to Embodiment 2 of the present invention. The only difference from the first embodiment shown in FIG. 1 is that the switches SW1 and SW2 are replaced with diodes Dd1 and Dd2. Accordingly, the operation is the same as that in FIG. 2 and the description is avoided, but when the power supply state is normal (before time t1 in FIG. 2 and after time t6).
Sets the output voltage of the DC / DC converter 13 to a value slightly lower than the output voltage DC100V of the secondary battery power storage device 5 so that the power supply to the DC load 14 can be entirely performed by the secondary battery power storage device 5. Can be output from the side. It is needless to say that the power can be supplied in parallel from both power storage devices to the DC load 14 at an appropriate sharing ratio by controlling the output voltage of the DC / DC converter 13 as described above.

When power supply from the overhead line is restored at time t4 in FIG. 2, in the second embodiment, diodes Dd1 and Dd2 are connected between both power storage devices and DC load 14.
Is inserted, so that the switch S
When the output voltage of the DC / DC converter 13 rises without operating W1 and SW2, the diode Dd2 is automatically turned on, and power is supplied from the DC / DC converter 13 to the DC load 14, and the diode Dd1 is turned on.
Is in a blocked state when a reverse voltage is applied, disconnects the connection between the secondary battery power storage device 5 and the DC load 14, and
It is possible to prevent a current from flowing from the / DC converter 13 side to the secondary battery power storage device 5.

Generally, a diode has a characteristic of being weak in surge withstand voltage and is somewhat inferior in reliability. However, if a countermeasure for this point is separately provided, the switches SW1 and SW of the first embodiment can be used.
As compared with the case of employing No. 2, there is an advantage that the device configuration is simple, compact, and inexpensive, and the circuit configuration of the control operation is also simple.

Embodiment 3 FIG. 4 is a configuration diagram illustrating an electric railway vehicle control power supply system according to Embodiment 3 of the present invention. The configuration is simplified by omitting the capacitor power storage device 12 and the DC / DC converter 13 from the circuit of FIG. 1 of the first embodiment. Continuing the power supply from the secondary battery power storage device 5 to the DC load 14 when the overhead line power is interrupted is the same as in the previous embodiment, but the power outage becomes long and the discharge voltage of the secondary battery power storage device 5 decreases. When the overhead line recovers power after reaching the lower limit, the switch SW1 is opened and the switch SW2 is closed to control the voltage of the charging device 2 to supply power to the DC load 14.

In this case, since there is no capacitor power storage device and the above-mentioned countermeasures against instantaneous stoppage are not taken, there is a disadvantage that a brake is applied every instantaneous stop and the ride comfort as a vehicle is deteriorated. Then, the train can resume operation immediately, and the confusion of the train schedule is suppressed. After charging of the secondary battery storage device 5 is completed, the switch SW
1 may be closed and power may be supplied from both charging devices 1 and 2;
The switch SW2 may be opened to supply power only from the charging device 1 side.

Embodiment 4 FIG. FIG. 5 is a configuration diagram showing an electric railway vehicle control power supply system according to Embodiment 4 of the present invention. Here, the DC load 14, which is used for measures against power failures in a broad sense, is divided into a load 14a for measures against power failures only required to maintain power supply during the period of a power failure, and a load 14b for measures against power failures in a narrow sense. . Driving safety devices such as brake control devices and ATC with a fail-safe function
Although it is necessary to take measures against momentary power failure, it is not necessary to take measures against power failure for a long time, which corresponds to the former load 14a against momentary power failure, and as shown in FIG.
Power is supplied from a circuit of the DC / DC converter 13. In addition, a train radio device, a broadcasting device, an emergency light, and the like correspond to the latter power failure countermeasure load 14b, and power is supplied from the circuits of the charging device 1 and the secondary battery power storage device 5.

Next, the operation will be described with reference to the timing chart of FIG. In the figure, a) shows a chart of the output voltage and load current of the secondary battery power storage device 5, and b) shows a chart of the output voltage and load current of the DC / DC converter 13 on the capacitor power storage device 12 side. When power supply from the overhead line is interrupted at time t1, the capacitor power storage device 12
Until time t2 when the discharge capacity of the DC / DC converter is exhausted, the DC / DC converter 13 keeps its output voltage at DC 100V. Therefore, until this time t2, the driving safety device and the brake control device continue the normal functional operation. When the capacitor capacity is the same as that of the capacitor power storage device 12 described in the first embodiment and the like, the voltage holding time (corresponding to the time from t2 to t1 in FIG. 6) is lengthened by the reduced discharge load.

At time t2, when the discharging ability of the capacitor power storage device 12 is exhausted, the DC / DC converter 13 stops, the supply of power to the load 14a for the instantaneous power failure countermeasure is cut off, the brake is activated by the original fail-safe function, and the train operates. Stops. Even after the time t2, the power to the power outage countermeasure load 14b of the train radio device and the emergency light is supplied with power until the discharge voltage of the secondary battery power storage device 5 reaches the limit value t3, and the operation is continued.

When power is restored at time t4, capacitor power storage device 12 is rapidly charged by charging device 2 and at time t5 D
The normal voltage DC100V is supplied from the C / DC converter 13 to the momentary power failure countermeasure load 14a, and the train can immediately resume operation and is supplied with power from the capacitor power storage device 12. Also, a constant voltage is maintained. After the power is restored at time t4, the secondary battery power storage device 5 opens the switches S1 and S2 and resumes charging by the charging device 1. At time t6 when the charging operation is completed, the switches S1 and S2 are closed to take measures against power failure. The power supply to the load 14b is resumed, and the use of the train radio device or the like becomes possible, and all the train equipment returns to a normal state.

In the case of FIG. 5, the required capacity of the charging device 2 is sufficient to be the capacity of the instantaneous power failure countermeasure load 14a. The capacity required for maintaining the power supply to the load 14a is sufficient.
It is possible to reduce the capacity as compared with the case of FIG.

Although not shown, by adding a voltage feedback control function to the charging device 2 for charging the capacitor power storage device 12, the circuit of FIG.
3 can be omitted to simplify the configuration. That is, after charging the capacitor power storage device 12 to a predetermined constant voltage DC100V by the charging device 2, the voltage limit function of the charging device 2 is operated to maintain DC100V. Therefore, a constant voltage is maintained by controlling the charging current with respect to a change in load.

When the power supply from the overhead line stops momentarily, the charging device 2
And the voltage of the capacitor power storage device 12 drops due to the discharge to the load 14a, but if the instantaneous interruption time is about 10 seconds at the maximum, the voltage drop during this period is imposed on the vehicle-mounted device. It is relatively easy to stay within the minimum operating voltage (usually about DC 80V). In this way, by integrating the instantaneous stoppage countermeasure load 14a on the capacitor power storage device 12 side, the capacities of the charging device 2 and the capacitor power storage device 12 can be reduced, and the price is reduced. Furthermore, DC / D
By omitting the C converter 13 and simplifying the configuration, an electric railway vehicle control power supply system with excellent economic reliability can be realized.

Embodiment 5 FIG. 7 is a configuration diagram showing an electric railway vehicle control power supply system according to Embodiment 5 of the present invention. The difference from the conventional FIG. 8 is that a switch SW3 as a switching device for opening and closing the connection between the charging device 4 and the DC load 14 and the secondary battery power storage device 5 is provided. Here, when the overhead line is out of power and the overhead line is restored after the discharge voltage of the secondary battery power storage device 5 reaches the limit value, the switch SW3 is opened, and power is supplied from the charging device 4 to the DC load 14. To do.

The secondary battery power storage device 5 is not recharged,
There are drawbacks such as a lack of comfort due to no measures against momentary blackouts when the vehicle is running.However, immediately after power is restored, the driving safety device and brake control device are started up, the brakes are released, and train operation resumes. And the worst possible situation in the conventional system can be avoided.

In each of the above embodiments, the DC 150
Although the description has been given of the case where the present invention is applied to the DC feed system using 0 V, the present invention can be similarly applied to the AC feed system using a higher voltage, and has the same effect. Further, the electric railway vehicle is not limited to a vehicle having a track, but may be a so-called railless electric vehicle such as a trolley bus.

[0042]

As described above, the electric railway vehicle control power supply system according to the present invention converts the electric power supplied from the feeder cable to output a charging current, and the first charging device. An electric railway vehicle control power supply system that includes a secondary battery storage device that is charged by a charging current from the device and that supplies power to a DC load from the secondary battery storage device. A second charging device that outputs a charging current, a capacitor power storage device that is charged by the charging current from the second charging device, and includes a capacitor, and a voltage of the capacitor power storage device that is determined by a predetermined voltage required for the DC load. A power conversion device that converts the voltage into a voltage, and when the power supply from the feeder cable is stopped, controlling the output voltage of the power conversion device to control the voltage from the power storage devices. Serial DC load to provide power, after the discharge capacity of the capacitor power storage device reaches a limit value supplies power to the DC load from the secondary battery electric power storage device,
When the power supply from the feeder returns after the discharge voltage of the secondary battery power storage device reaches the limit value, the connection between the secondary battery power storage device and the DC load is disconnected and the charging operation of the first charging device is performed. And power is supplied from the capacitor power storage device to the DC load by controlling the output voltage of the power conversion device. if you did this,
The vehicle can be restarted immediately by supplying power to the DC load immediately, and power can be supplied to the DC load even in the event of a momentary power failure until the recharge of the secondary battery power storage device is completed. Is maintained.

Further, in the electric railway vehicle control power supply system according to the present invention, the capacity of the second charging device is set to the capacity of the DC load, and the chargeable / dischargeable capacity of the capacitor is temporarily generated during operation of the vehicle. The capacity required to maintain the power supply to the DC load during the instantaneous power outage, which is a temporary power outage, is set to a value necessary to minimize the required capacity of the capacitor, thereby reducing the size and cost of the device. Is achieved.

Further, the electric railway vehicle control power supply system according to the present invention includes a second charging device capable of converting the electric power supplied from the feeder cable and supplying the electric power to the DC load, and supplying the electric power from the feeder cable. When the power supply from the feeder cable is restored after the discharge voltage of the secondary battery power storage device has reached a limit value, power is supplied from the secondary battery power storage device to the DC load. Since the connection between the battery power storage device and the DC load is disconnected, the charging operation of the first charging device is restarted, and power is supplied from the second charging device to the DC load. When the power supply from the electric wire is stopped for a long time and then returned, the electric power can be supplied to the DC load immediately and the operation of the vehicle can be restarted immediately. Realize the system It is possible.

Further, in the electric railway vehicle control power supply system according to the present invention, a diode is inserted into the output terminal of the secondary battery power storage device, the power supply from the feeder is stopped, and the discharge voltage of the secondary battery power storage device is reduced. When the power supply from the feeder returns after the limit value is reached, the diode automatically disconnects the connection between the secondary battery power storage device and the DC load, and the secondary charging device sends the secondary battery power from the secondary charging device side. Since the flow of current into the battery power storage device is prevented, the configuration operation of the switching means for switching between the power storage device and the DC load is simplified.

Further, the electric railway vehicle control power supply system according to the present invention provides the first and second power supply systems when the power supply from the feeder exists and the voltage of the secondary battery power storage device is at a level capable of supplying the DC load. Since the output of the second charging device or the power conversion device is controlled so as to supply power from the charging devices to the DC load, the degree of freedom in setting the load of the charging devices is increased and the reliability is improved. It becomes possible to pursue driving.

Further, the electric railway vehicle control power supply system according to the present invention converts the power supplied from the feeder cable to output a charging current, and uses the charging current from the second charging device. A capacitor power storage device comprising a capacitor to be charged, and a power conversion device for converting the voltage of the capacitor power storage device to a predetermined voltage required for a DC load, wherein the DC load is temporarily generated during operation of the vehicle. Power supply is only required to be maintained during the momentary power outage that is a sudden power outage, and the power outage countermeasure load is divided into other power outage countermeasure loads.Power is supplied from the secondary battery power storage device to the power outage countermeasure load, Power is supplied from the power converter to the instantaneous power failure countermeasure load. Therefore, if the power supply from the feeder cable is stopped for a long time and the power supply is restored, the DC load is immediately supplied to the load. Supplies can immediately resume operation of the vehicle, also the power supply to the DC load is maintained against instantaneous power failure in the period until re-charging of the secondary battery electric power storage device is completed.

Also, the electric railway vehicle control power supply system according to the present invention converts a power supplied from a feeder cable to output a charging current, and a charging current from the second charging device. And a momentary power failure countermeasure load that requires only maintenance of power supply during a momentary power failure, which is a temporary power failure that occurs during operation of the vehicle. Power supply to the above-mentioned power failure prevention load, power is supplied from the secondary battery power storage device, and the above-mentioned capacitor power storage device is supplied to the above-mentioned momentary power failure prevention load. If the power supply is stopped for a long time after the power supply has been stopped for a long time, the power can be supplied to the DC load immediately, and the operation of the vehicle can be restarted immediately. There is the power supply to the DC load is maintained against instantaneous power failure in the period up to completion.

Further, in the electric railway vehicle control power supply system according to the present invention, the capacity of the second charging device is set to the capacity of the load for countermeasures against momentary power failure, and the chargeable / dischargeable capacity of the capacitor during the period of momentary power failure is set. Since the capacity required for maintaining the power supply to the load against the momentary power failure is set, the required capacity of the capacitor can be further reduced, and the size and cost of the device are thoroughly reduced.

Further, the electric railway vehicle control power supply system according to the present invention converts a power supplied from a feeder cable to output a charging current, and a secondary device charged by the charging current from the charging device. Equipped with a battery storage device,
An electric railway vehicle control power supply system for supplying power to a DC load from the secondary battery power storage device, comprising: a charging / discharging device that opens and closes a connection between the charging device and the DC load and the secondary battery power storage device; When the power supply from the electric wire exists, the switchgear is closed, the power supply from the feeder cable is stopped, and the power supply from the feeder cable is restored after the discharge voltage of the secondary battery power storage device reaches a limit value. In this case, the switchgear is opened, and the power is supplied from the charging device to the DC load. Therefore, with a simple configuration, if the power supply from the feeder cable is stopped for a long time and the power supply is restored, Thus, the operation of the vehicle can be immediately resumed by supplying power to the DC load, and an economical and highly reliable electric railway vehicle control power supply system can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an electric railway vehicle control power supply system according to Embodiment 1 of the present invention.

FIG. 2 is a timing chart for explaining the operation of FIG.

FIG. 3 is a configuration diagram illustrating an electric railway vehicle control power supply system according to Embodiment 2 of the present invention.

FIG. 4 is a configuration diagram illustrating an electric railway vehicle control power supply system according to Embodiment 3 of the present invention.

FIG. 5 is a configuration diagram showing an electric railway vehicle control power supply system according to Embodiment 4 of the present invention.

FIG. 6 is a timing chart for explaining the operation of FIG. 5;

FIG. 7 is a configuration diagram illustrating an electric railway vehicle control power supply system according to Embodiment 5 of the present invention.

FIG. 8 is a configuration diagram showing a conventional electric railway vehicle control power supply system.

[Explanation of symbols]

1 overhead wire, 4 charging device, 5 secondary battery power storage device, 10
Charging devices 1, 11 Charging devices 2, 12 Capacitor power storage device, 13 DC / DC converter, 14 DC load, 14a Momentary power failure countermeasure load, 14b Power failure countermeasure load, D
d1, Dd2 diode, SW3 switch.

Claims (9)

[Claims] A first charging device that converts power supplied from a feeder cable and outputs a charging current; and a secondary battery power storage device that is charged by the charging current from the first charging device. An electric railway vehicle control power supply system for supplying power from a secondary battery power storage device to a DC load, wherein a second charging device that converts power supplied from the feeder cable and outputs a charging current, A capacitor power storage device that is charged by a charging current from the device and includes a capacitor; and a power converter that converts a voltage of the capacitor power storage device to a predetermined voltage required for the DC load. When stopped, power is supplied from the power storage devices to the DC load by controlling the output voltage of the power conversion device, and the discharge capacity of the capacitor power storage device is controlled. After reaching the limit value, power is supplied from the secondary battery power storage device to the DC load, and when the power supply from the feeder cable is restored after the discharge voltage of the secondary battery power storage device reaches the limit value, Disconnecting the connection between the secondary battery power storage device and the DC load, restarting the charging operation of the first charging device, and controlling the output voltage of the power conversion device to supply power from the capacitor power storage device to the DC load. And an electric railway vehicle control power supply system. 2. The capacity of the second charging device is set to the capacity of a DC load, and the chargeable / dischargeable capacity of the capacitor is set to a value of the DC load during a momentary power outage which is a temporary power failure occurring during operation of the vehicle. The power supply system for controlling electric railway vehicles according to claim 1, wherein the capacity is set to a capacity necessary for maintaining power supply to the railway. 3. A first charging device that converts power supplied from a feeder cable and outputs a charging current, and a secondary battery power storage device that is charged by the charging current from the first charging device. An electric railway vehicle control power supply system for supplying power to a DC load from the secondary battery power storage device, comprising a second charging device capable of converting power supplied from the feeder cable and supplying power to the DC load. When the power supply from the feeder is stopped, power is supplied from the secondary battery to the DC load, and after the discharge voltage of the secondary battery reaches a limit value, the power is supplied from the feeder. Is restored, the connection between the secondary battery power storage device and the DC load is disconnected, the charging operation of the first charging device is restarted, and power is supplied from the second charging device to the DC load. Did Electric railway vehicle control power supply system according to claim. 4. A power supply from the feeder is stopped by inserting a diode into the output terminal of the secondary battery storage device, and after the discharge voltage of the secondary battery storage device reaches a limit value, the power supply from the feeder cable is stopped. When returning, by the above diode,
4. The method according to claim 1, wherein the connection between the secondary battery storage device and the DC load is cut off, and a current is prevented from flowing from the second charging device to the secondary battery storage device. An electric railway vehicle control power supply system according to any one of the above. 5. When power is supplied from a feeder cable and the voltage of the secondary battery storage device is at a level capable of supplying a DC load,
The output of the second charging device or the power conversion device is controlled so that power is supplied from both the first and second charging devices to the DC load.
5. The electric railway vehicle control power supply system according to any one of claims 1 to 4. 6. A first charging device that converts a power supplied from a feeder cable and outputs a charging current, and a secondary battery power storage device that is charged by the charging current from the first charging device. An electric railway vehicle control power supply system for supplying power from a secondary battery power storage device to a DC load, wherein a second charging device that converts power supplied from the feeder cable and outputs a charging current, A capacitor power storage device that is charged by a charging current from the device and includes a capacitor, and a power conversion device that converts a voltage of the capacitor power storage device to a predetermined voltage required for the DC load. It is divided into momentary power failure countermeasure loads that require only maintenance of power supply during the period of momentary power failure, which is a temporary power failure that occurs during operation, and other power failure countermeasure loads,
An electric railway vehicle control power supply system, wherein power is supplied from the secondary battery power storage device to the power failure countermeasure load, and power is supplied from the power converter to the momentary power failure countermeasure load. 7. A first charging device that converts power supplied from a feeder cable and outputs a charging current, and a secondary battery power storage device that is charged by the charging current from the first charging device. An electric railway vehicle control power supply system for supplying power to a DC load from the secondary battery power storage device, a second charging device for converting power supplied from the feeder cable and outputting a charging current; A capacitor power storage device comprising a capacitor, which is charged by a charging current from the charging device, is required to maintain only the power supply during the instantaneous blackout period, which is a temporary blackout that occurs while the vehicle is operating, with the DC load. Into two types: the instantaneous interruption countermeasure load and the other power failure countermeasure load.
An electric railway vehicle control power supply system, wherein power is supplied from the secondary battery power storage device to the power failure countermeasure load, and power is supplied from the capacitor power storage device to the momentary power failure countermeasure load. 8. The capacity of the second charging device is set to the capacity of the load for preventing instantaneous power failure, and the chargeable / dischargeable capacity of the capacitor is set to the capacity required for maintaining the power supply to the load for preventing instantaneous power failure during the period of instantaneous power failure The electric railway vehicle control power supply system according to claim 6 or 7, wherein the control system is set to: 9. A charging device that converts power supplied from a feeder cable and outputs a charging current, and a secondary battery power storage device that is charged by the charging current from the charging device.
An electric railway vehicle control power supply system for supplying power to a DC load from the secondary battery power storage device, comprising: a switching device for opening and closing a connection between the charging device and the DC load and the secondary battery power storage device; When the power supply from the electric wire exists, the switchgear is closed, the power supply from the feeder cable is stopped, and the power supply from the feeder cable is restored after the discharge voltage of the secondary battery power storage device reaches a limit value. In this case, the switchgear is opened, and power is supplied from the charging device to the DC load.