JPH10174202A - Backup power-supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backup power-supply system, by which a load power- supply system becomes an optimum and reasonable power-supply system as a whole when the backup power supply of a vehicle power supply is taken into consideration, and by which a power supply device becomes small, lightweight and low-cost as a whole on the assumption that a load is not limited or the load is not stopped partly or wholly during the backup power supply. SOLUTION: In the auxiliary power supply where this system is applied, a high voltage input having a fluctuation is supplied from a high voltage stringing by means of a pantograph or the like. After converting power to AC, a plurality of power supply units 2 to 4 are mounted to each vehicle constituting a train of rolling stock for supplying low and stable AC output to various kinds of low voltage onboard apparatuses. In this case, an emergency power- supply device 1A is loaded onto an arbitrary vehicle. When any of the power- supply devices 2 to 4 is broken down, the broken-down power-supply device is released from a load, and the load which is electrified by the broken-down power-supply device is backed up and electrified from the emergency power- supply device 1A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup power supply system for a power supply device, particularly to a power supply device for a vehicle such as a railway vehicle, and more particularly to a power supply device for all loads even when one of a plurality of power supply devices fails. The present invention relates to a backup power supply system for a vehicle auxiliary power supply that can supply power without any trouble.

[0002]

2. Description of the Related Art FIG. 6 is a circuit diagram showing a backup power supply circuit of a conventional auxiliary power supply device for a vehicle, which is disclosed in, for example, a paper of "The 26th Railway Cybernetics" in 1990. In FIG. 6, reference numerals 101 and 102 denote the auxiliary vehicle power supply units mounted on one vehicle set, and reference numerals 103, 104, 105 and 106 denote loads on the vehicle, respectively. This indicates that the load is an important load that seriously hinders vehicle operation and the like, and each of these load capacities is set to 5 kVA for convenience. Reference numerals 103A, 104A, 105A, and 106A also indicate service loads of a so-called air conditioner or the like, which are loads of the vehicle but do not seriously affect the operation of the vehicle even when the power is lost. Capacity is 45 each
kVA. 6, reference numeral 107 denotes a load contactor of the power supply 101, 108 denotes a load contactor of the power supply 102, and 109, 110, 111, and 112 denote load contactors for separating the service load.

Next, the operation of this conventional example will be described.

In FIG. 6, a load contactor 107 (K1)
Is turned on, and the load contactor 108 (K2) is supplying power from the power supply device 101 (No1) to the load in an open state. At this time, the power supply device 102 (NO2) is in a stopped state or a standby state, and a state in which the power supply device 102 is not supplying power to the load is a normal operation state. Here, the load contactors 109 (K10), 110 (K
11), 111 (K12), 112 (K13) are turned on, and the loads 103A, 104A, 105A, 1
06A is supplied with power from the power supply device 101. In this normal operation state, all vehicle loads 103 to 106 A
Since the power supply device 101 performs a load operation, the rated capacity of the power supply device 101 requires a total load of 200 kVA, which is the sum of the loads 103 to 106 and the loads 103A to 106A. From this normal operation state, the power supply 1
When the power supply failure occurs in 01, the load contactor 107 is disconnected from the load circuit, the load contactor 108 is turned on, and backup power is supplied from the power supply device 102 to the loads 103 to 106A.

[0005] In this backup operation, the load contactors 109 to 112 are configured to be opened in advance by a failure signal of the power supply device 102, and the service loads 103A to 106A are detected from the load of the power supply device 102. Be separated. For this reason, as the load of the power supply device 102, only the important loads 103 to 106 receive the power supply, and the system is configured so as not to hinder the operation of the vehicle. Therefore, the rated capacity of the power supply device 102 is the total load capacity of the important loads 103 to 106, ie, 2
0 kVA. For this reason, the rated capacity of the power supply device 102 is much smaller than the rated capacity of the power supply device 101, and the power supply device is compact.

[0006]

Since the conventional backup power supply system for a vehicle power supply is configured as described above, if a failure occurs in a healthy power supply, the service loads 103A to 106A are reduced. Although it is necessary to stop the vehicle, there is no problem in vehicle operation, but there is a problem that vehicle service is reduced.

Therefore, the present invention has been made to solve the above-described problems, and a backup power supply system which is an optimal rational power supply system as a whole load power supply system in consideration of a backup power supply of a vehicle power supply. It is an object to provide a power supply system.

Another object of the present invention is to provide a power supply device as a whole assuming that some or all of the load is not limited or the load is not stopped during backup power supply (when a power failure occurs). It is an object of the present invention to provide a small, lightweight and inexpensive backup power supply system.

[0009]

According to a first aspect of the present invention, there is provided a backup power supply system, comprising: inputting a high voltage having a voltage fluctuation from a high voltage overhead line by means such as a pantograph and performing power conversion; A plurality of power supply units for supplying low-voltage stable AC output to low-voltage equipment mounted on various vehicles are used as auxiliary power supply units for vehicles mounted on a vehicle composed of a plurality of vehicles. When a power supply device is mounted in advance, and when any one of the power supply devices cannot operate due to a failure, the load supplied by the failed power supply device after releasing the failed power supply device from the load. And a backup power supply from the emergency power supply.

According to a second aspect of the present invention, there is provided a backup power supply system, comprising: inputting a high voltage having a voltage fluctuation from a high voltage overhead line by means such as a pantograph; A plurality of power supply devices for supplying low-voltage equipment mounted on various vehicles, in a vehicle auxiliary power supply device mounted on a vehicle composed of a plurality of vehicles, the rated capacity of the power supply device mounted on the intermediate vehicle By making it larger than the rated capacity of the power supply device mounted on the vehicle at both ends, if any of the power supply devices mounted on the vehicle at both ends is stopped,
Disconnect the load of the power supply unit that has stopped and provide backup power to the load from the power supply unit mounted on the intermediate vehicle.
When the power supply device of the intermediate vehicle stops due to a failure, the load of the power supply device that has failed is stopped, and the load is configured as a backup system that supplies power to the load from another healthy power supply device mounted on the intermediate vehicle. The mounted power supply device is configured to reduce the rated capacity of the entire power supply device by not performing backup power supply to the load of the intermediate vehicle even when the power supply device mounted on the intermediate vehicle fails.

According to a third aspect of the present invention, in the backup power supply system, a high-voltage voltage having a voltage fluctuation is input from a high-voltage overhead line by a means such as a pantograph, and after performing power conversion, a low-voltage stable AC output is provided. A plurality of power supply devices for supplying low-voltage equipment mounted on various vehicles, in a vehicle auxiliary power supply device mounted on a vehicle composed of a plurality of vehicles, in advance, by switching means, the power supply device in a healthy state In the case where the power supply unit to be supplied is divided and the power supply unit stops due to a failure, after disconnecting the power supply unit in which the failure has occurred from the load, the supply unit of the load during normal operation is changed by the switching unit. Accordingly, the capacity of the load to be backed up by each healthy power supply device is averaged and reduced as much as possible, so that the rated capacity of the entire power supply device can be reduced.

According to a fourth aspect of the present invention, there is provided a backup power supply system, comprising: inputting a high voltage having a voltage fluctuation from a high voltage overhead line by means such as a pantograph; performing power conversion; A plurality of power supply devices for supplying low-voltage equipment mounted on various vehicles, in a vehicle auxiliary power supply device mounted on a vehicle composed of a plurality of vehicles, the loads are connected to each other via switching means,
The output voltages of all of the power supply devices are set in a synchronous operation state in advance, and during normal operation, the switching unit is turned off to divide the loads, and power is supplied to the loads by all of the power supply devices in the synchronous operation state. If any power supply fails, all of the switching means that divide the load are turned on to perform parallel synchronous operation of a plurality of healthy power supplies to supply power to the load. , So as to reduce the rated capacity of the entire power supply device.

According to a fifth aspect of the present invention, in the backup power supply system, a high-voltage voltage having a voltage fluctuation is input from a high-voltage overhead line by means such as a pantograph, and after performing power conversion, a low-voltage stable AC output is provided. A plurality of power supply devices for supplying low-voltage equipment mounted on various vehicles, in a vehicle auxiliary power supply device mounted on a vehicle composed of a plurality of vehicles, the output voltages of all the power supply devices are synchronized in advance in a synchronous operation state. By supplying power to the load of the vehicle by the parallel synchronous operation of a plurality of power supply units, even if any of the power supply units fails and stops, the power supply unit from other healthy synchronous operation state to the load can be supplied. Without interruption of power supply,
Further, the power supply device is configured so that the rated capacity of the entire power supply device can be reduced.

According to a sixth aspect of the present invention, there is provided a backup power supply system, wherein a plurality of power supplies, a plurality of loads respectively connected to the plurality of power supplies via first switching means, and a plurality of loads are provided. One emergency power supply device connected via the second switching means, and during normal operation, all the first switching means are turned on and the power supply device is connected to the plurality of loads via the first switching means. The emergency power supply device is disconnected from the load while all of the second switching means are turned off, and when any of the power supply devices fails, power is supplied from the failed power supply device. The first switching means connected to the load is turned off, and only the second switching means corresponding to the load is turned on, so that the emergency power supply device supplies power to the load.

According to a seventh aspect of the present invention, a backup power supply system includes a plurality of power supplies, a plurality of loads respectively connected to the plurality of power supplies via first switching means, the load and the first power supply. A second switching means for connecting the electric paths between the first and second switching means, and in a normal operation, all of the first switching means are turned on and the power supply device is connected to the first switching means.
Connected to the plurality of loads via switching means, and all the second switching means are turned off;
When any of the power supply units fails, only the first switching unit connected to the failed power supply unit is turned off, and only the second switching unit connected to the load is turned on, so that a healthy power supply is supplied to the load. It is configured to supply power from the device.

In a backup power supply system according to an eighth aspect of the present invention, the power supply devices are connected to each other in a line via the first switching means and the second switching means, and a rated capacity of the intermediate power supply device is provided. Is set to be larger than the rated capacity of the power supply device at both ends, and if any of the power supply devices fails, to the load that has been supplied with power from the failed power supply device, the intermediate load adjacent to the failed power supply device The power supply device is configured to supply power.

According to a ninth aspect of the present invention, there is provided a backup power supply system, wherein a plurality of power supplies, a plurality of loads connected to the plurality of power supplies via first switching means, and an electric circuit connecting the loads. In normal operation, all the first switching means are turned on, and the second switching means is selectively turned on / off, so that all of the loads are connected to the respective loads. The power supply device is equally connected, and when any of the power supply devices fails, the first switching means connected to the failed power supply device is turned off and the on / off state of the second switching means is selected. So that power is supplied to all the loads from a healthy power supply device as evenly as possible.

According to a tenth aspect of the present invention, in the backup power supply system, a plurality of power supplies, a plurality of loads respectively connected to the plurality of power supplies via first switching means, the load and the first power supply are provided. A second switching means for connecting the electric circuits between the switching means and the electric circuit between the power supply device and the first switching means, so that the output voltages of all the power supply devices are synchronously operated in advance. During normal operation, all the second switching means are turned off and all the first switching means are turned on, so that the output of the power supply device in the synchronous operation state is distributed and supplied to all the loads. In addition, when any of the power supply devices fails, the first switching means corresponding to the failed power supply device is turned off, and all the second switching means are turned on, so that all the loads are connected. Configured to power the sound power supply operating conditions.

A backup power supply system according to an eleventh aspect of the present invention includes a plurality of power supplies, and a plurality of loads respectively connected to the plurality of power supplies via first switching means. The electric circuits between the first switching means are connected to each other, and the output voltages of all the power supply devices are set in a synchronous operation state in advance. During the normal operation, all the first switching means are turned on and the synchronous operation state is set. Outputs of all of the power supply devices are distributed to all of the loads, and in the event of a failure of any of the power supply devices, the first switching means connected to the load corresponding to the failed power supply device is turned off and the remaining Is configured to supply power to all the loads from a healthy power supply device.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIG. 1 is an electric circuit diagram of Embodiment 1 showing an example in which the present invention is applied to a backup power supply system in an auxiliary power supply device for a vehicle such as a railway vehicle. In the first embodiment, after a high-voltage having a voltage fluctuation is input from a high-voltage overhead line by means such as a pantograph, power conversion is performed, a low-voltage stable AC output is output to various low-voltage devices mounted on a vehicle. A plurality of power supply devices for supplying to a vehicle load are mounted on a vehicle comprising a plurality of vehicles. In the auxiliary power supply device for a vehicle, an emergency power supply device is previously mounted on an arbitrary vehicle, and the power supply When the operation cannot be continued due to a failure of any of the devices, the emergency power supply is supplied with backup power from the emergency power supply to the load supplied by the failed power supply after releasing the failed power supply from the load. It was made.

In FIG. 1, the backup power supply system according to the first embodiment performs a power conversion by inputting a high-voltage having a voltage fluctuation from a high-voltage overhead line by a pantograph or the like in a normal operation state, and then performing a low-voltage Plurality of power supplies 2 to supply stable AC output to vehicle loads 5 to 7
4 and the same functions as those of the power supply units 2 to 4, and are normally in a stopped state or a standby operation state.
And an emergency power supply device 1A that operates when any one of the above-mentioned failures occurs. The load capacity of each load 5-7 is 100 for convenience.
kVA. Reference numerals 10 to 12 indicate power supply units 2 to 4
, Which is normally in a closed state, and the power supply devices 2 to 4 are individually connected to the vehicle loads 5 to 7 via these load contactors 10 to 12, respectively.
Reference numerals 14 to 16 denote load contactors as second switching means for output of the emergency power supply device 1A, which are open in a normal operation state.

Next, the operation of the first embodiment will be described in detail.

In FIG. 1, for example, from a normal operation state,
When the power supply device 2 has failed, the load contactor 10
(K1) is released, and among the load contactors of the emergency power supply 1A, the load contactors 11 corresponding to the failed main power supply 2
Only (K10) is input. Therefore, the load 5 (load 1) of the failed power supply device 2 is supplied with power from the emergency power supply device 1A. Similarly, when the power supply 3 (NO3) fails, the contactor 9 corresponding to the power supply 3
(K2) is opened and only the load contactor 15 (K11) for the emergency power supply is immediately turned on. Also,
Even when the power supply device 4 fails, power is supplied to the load 7 by switching the corresponding load contactor 16, so that even if any of the power supply devices 2 to 4 fails, the emergency power supply device 1A can be used as a backup power supply. In the conventional method of FIG. 6 described above, the load must be limited at the time of the backup power supply. However, in the first embodiment, the load is not limited and the service is not reduced.

Further, backup power can be supplied from the power supply device adjacent to the failed power supply device without limiting the load without using the emergency power supply device 1A. 4, it is necessary to set the rated capacity to 200 kVA (twice the normal capacity). In this case, the total power capacity is 3 units × 200 kVA = 60 in the example of FIG.
A rated capacity of 0 kVA is required for the entire power supply. On the other hand, in the first embodiment, 4 units × 100 kVA = 400
A rated capacity of kVA is sufficient, and the size and weight of the entire apparatus can be reduced, and the manufacturing cost can be reduced.

Embodiment 2 FIG. In the first embodiment, an example in which the emergency power supply 1A is used in preparation for a failure of the three power supplies 2 to 4 has been described. Embodiment 2 is shown in FIG. For convenience of explanation, the second embodiment in FIG. 2 shows an example in which four power supply devices 1 to 4 are used.

In the second embodiment, four power supply units 1
To 4 are load contactors 10 as first switching means, respectively.
, And the output sides of the load contactors 10 to 13 adjacent to each other are respectively connected to the extended power supply contactors 1 as second switching means.
They are connected to each other via 4A to 16A. The power supply devices 1 and 4 at both ends are respectively mounted on vehicles at both ends of a plurality of vehicles connected to each other, and the intermediate power supply devices 2 and 3 are mounted on any of the intermediate vehicles. The power supplies 1 and 4 are set to have a rated capacity that is half the rated capacity of the intermediate power supplies 2 and 3. Also, power supply units 1 to
Each of the vehicle loads 5 to 8 supplied from 4 has a load capacity of 100 kVA for convenience of explanation.

Next, the operation of the second embodiment will be described below.

First, at the time of normal operation, the load contactors 10 to 13 of the power supply units 1 to 4 are in an ON state, and the extension power supply contactor 14 A installed at the boundary of the load supply section of the power supply units 1 to 4. 16A are in an open state. Therefore, the power supply devices 1 to 4 are each provided with a load contactor 1 installed therein.
Power is individually supplied to the corresponding loads 5 to 8 through 0 to 13. From this state, when the power supply device 1 fails, only the load contactor 10 corresponding to the failed power supply device 1 is opened, and the extended power supply contactor 1 is opened.
Of the 4A to 16A, only the extension power contactor 14A at the boundary of the load supply section between the failed power supply 1 and the power supply 2 adjacent thereto is turned on. Therefore, the load 5 and the load 6 are supplied with power from the power supply device 2 adjacent to the failed power supply device 1.

When the power supply 2 has failed, only the load contactor 11 corresponding to the failed power supply 2 is opened, and the extended power supply contactor between the failed power supply 2 and the adjacent power supply 3 is opened. 15 is input. Therefore, the power supply 2
, The load 6 and the load 7 are supplied with power from the power supply device 3.

In FIG. 2, the extension power contactor 1 is shown.
Since the system is symmetrical with respect to 4A, when the power supply 3 or 4 fails, the load supply section is symmetrical to that when the power supply 2 or 1 fails. That is, when the power supply device 3 fails, the extension power supply contactor 15A is turned on, and the load 7 corresponding to the failed power supply device 3 is supplied with power from the power supply device 4. 16A is turned on, and the load 8 is supplied with power from the power supply device 3.

In the second embodiment, since the backup operation as described above is performed, that is,
If any one of the power supplies 4 fails, the intermediate power supply adjacent to the failed power supply supplies backup power to the load supplied from the failed power supply.
For the vehicle load capacity shown in FIG. 7, the power supply apparatuses 1 and 4 at both ends have a rated capacity of 100 kVA, the intermediate power supply apparatuses 2 and 3 have a rated capacity of 200 kVA, and the total rated capacity is 2 × 100 kVA + 2 × 200 kVA.
= 600 kVA. For the vehicle load of FIG.
In the case where the first embodiment is applied, 4 units × 100 kV
A + 100 kVA = 500 kVA, and Embodiment 1 in FIG. 1 can reduce the total power supply capacity. However, the number of power supply devices is four in FIG. 2 and five in FIG. Can reduce the number of power supplies,
Although depending on the relationship between the rated capacity and the number of units, there is a possibility that the total weight and cost of the power supply device can be reduced as compared with the first embodiment of FIG.

In the second embodiment, the number of power supply units can be reduced, so that the reliability of the entire power supply system can be improved.

Embodiment 3 In the second embodiment, the load supply section is divided into three extension power contactors 14A to 16A.
FIG. 3 shows an example in which the power supply section is further subdivided. In the third embodiment, six loads are connected to four power supply devices 1 to 4, and during normal operation, each power supply device 1 to 4 can supply power to two loads. Two loads can be connected to 1 to 4, respectively. That is, the power supply device 1 includes the load 5
a is connected via the load contactor 10, and the load 5b is connected via the extension power contactor 14a and the load contactor 10. Similarly, the load 6a is connected to the power supply device 2 by the load contactor 11. , The load 6b is connected via the extension power contactor 15a and the load contactor 11, and the load 7a is connected to the power supply device 3 via the load contactor 12. 7b is connected via the extension power supply contactor 16a and the load contactor 12, and the power supply 4 is connected to the load 8a via the extension power supply contactor 17A and the load contactor 13, and is connected to the load 8b. It is connected via a load contactor 13. In addition, load 5b
And the load 6a are connected by an extension power contactor 14b, the load 6b and the load 7a are connected by an extension power contactor 15b, and the load 7b and the load 8a are connected by an extension power contactor 16b. .

In FIG. 3, during normal operation, among the extended power supply contactors 14a to 17A in the load supply section, four of the extended power supply contactors 14a, 15a, 16a and 17A are in the ON state, while the extended power supply Contactors 14b, 15
b and 16b are open.

If the power supply device 1 fails, the load contactor 10 (K1) corresponding to the failed power supply device 1 is opened, and the extended power supply contactor 14b, which has been in the open state, is opened.
(K6), and the contactor 15a (K
7) is opened, and the contactor 15b which has been opened is further opened.
(K8) is input. By switching the power supply section,
The power supply 2 supplies power to the loads 5a, 5b, 6a, and the power supply 3 supplies power to the loads 6b, 7a, 7b.

When the power supply device 2 fails, the load contactor 11 (K2) corresponding to the failed power supply device 2 is opened, and the extended power supply contactor 14 which has been in the open state is opened.
b (K6) is input, the extended power supply contactor 15a (K7) in the input state is opened, and the extended power supply contactor 15b (K8) in the open state is input. By this switching of the power supply section, the power supply device 1 loads the loads 5a, 5b, 6
a, and the power supply device 3 supplies power to the loads 6b, 7a, 7b.

Further, when the power supply device 3 or 4 fails, the power supply section is switched in substantially the same manner as when the power supply device 2 or the power supply device 1 fails.

Therefore, considering the backup operation of each of the power supply devices 1 to 4, the rated capacity of each power supply device may be 150 kVA. For this reason, the total load of the system and the number of power supplies are the same as those in the second embodiment of FIG. 2, but in the case of FIG. 2, each power supply needs to be configured with two types of rated capacities. On the other hand, in the third embodiment, only one type of power supply device needs to be manufactured, so that the power supply device can be provided at lower cost than in the second embodiment in FIG.

Embodiment 4 FIG. FIG. 4 shows an embodiment in which the power supply system is configured by a parallel synchronous operation method in order to further reduce the capacity of the power supply device. Embodiment 4
Has substantially the same configuration as that of the second embodiment of FIG. 2 except that the output side of each power supply is connected to each other before the load contactor.

In the fourth embodiment, the extension power supply contactors 14A to 16A are open in the normal operation state, and the power supply units 1 to 4 are controlled in parallel synchronous operation control through the simulated bus lead-in line 30. Have been. Each of the load contactors 10 to 13 is in a closed state in a normal operation state.

If the power supply 1 breaks down, the load contactor 10 (K1) is opened, and all the extension power supply contactors 14A to 16A are turned on. Power supply units 1-4
Is originally controlled synchronously in the normal operation state, so that the AC output of each of the power supply devices 2 to 4 is extended contactor 14A to 14C.
There is no problem even if they become common by simultaneous injection of 16A.
Therefore, the total load of the entire vehicle 4 × 100 kVA = 40
Since 0 kVA can be shared and supplied by the three power supplies 2 to 4, the rated capacity per power supply is 134 kVA.
You can put it as.

While the total power supply capacity of the second and third embodiments is 600 kVA, in the fourth embodiment,
Since the rated capacity of four units x 134 kVA = 536 kVA is sufficient, the power supply device can be further reduced in size, weight, and cost.

Embodiment 5 FIG. In the fourth embodiment, a system in which parallel power is supplied from a healthy power source during the backup operation is shown. However, FIG. 5 shows a system in which parallel power is supplied from the normal operation. In the fifth embodiment, the output sides of the load contactors 10 to 13 are directly connected to each other.
A to 16A are removed.

In the fifth embodiment, the backup operation is automatically performed by opening the load contactor of only the failed power supply, and is similar to the fourth embodiment in FIG.
As compared with the above, the extension power supply contactors 14A to 16A are omitted, so that the whole device can be further reduced in size and weight and inexpensive.

In the above description of the second to fifth embodiments, the case where the number of power supplies is four and the load of the vehicle is a specific number (four or eight) is described, but the present invention is not limited to these. However, the present invention can be equally applied to one using a plurality of power supply devices and loads.

In the above description, the case where the present invention is applied to a backup power supply system of an auxiliary power supply device of a vehicle such as a train is described as an example. It is equally applicable.

[0048]

As described above, according to the present invention, when the backup operation is considered, an optimum rated capacity can be obtained as a backup power supply system for a vehicle auxiliary power supply or a general power supply. -A lightweight and inexpensive power supply system can be provided.

Further, the capacity of the power supply device mounted on the vehicle is optimized by switching the load supply category during the backup operation, and the rated capacity of the power supply device is minimized, so that the power supply device can be reduced in size as a whole. , Light weight and low cost.

Further, when the backup power supply is taken into consideration, the load supply section can be switched so that the rated capacity of the power supply can be supplied rationally without any excess. In this way, backup operation becomes possible without limiting all loads,
There is no reduction in vehicle service.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a backup power supply system according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a backup power supply system according to a second embodiment of the present invention.

FIG. 3 is a circuit diagram of a backup power supply system according to Embodiment 3 of the present invention.

FIG. 4 is a circuit diagram of a backup power supply system according to Embodiment 4 of the present invention.

FIG. 5 is a circuit diagram of a backup power supply system according to Embodiment 5 of the present invention.

FIG. 6 is a circuit diagram of a conventional backup power supply system.

[Explanation of symbols]

1, 2, 3, 4 power supply, 1A emergency power supply, 5
~ 7 load, 5a ~ 8a load, 5b ~ 8b load, 1
0-13 Load contactor as first switching means, 14A-
17A Extended power contactor as second switching means, 14
a to 16a contactors for extended power feeding as second switching means,
14b to 16b Extended power feed contactors as second switching means.

Claims (11)

[Claims] 1. A high-voltage voltage having a voltage fluctuation is input from a high-voltage overhead line by a means such as a pantograph, and after performing power conversion, a low-voltage stable AC output is supplied to various low-voltage devices mounted on a vehicle. In a vehicle auxiliary power supply device in which a plurality of power supply devices are mounted on a vehicle composed of a plurality of vehicles, an emergency power supply device is previously mounted on an arbitrary vehicle, and one of the power supply devices fails. Backup power supply, wherein when the operation cannot be continued, the failed power supply device is released from the load, and then the emergency power supply device supplies a backup power to the load supplied by the failed power supply device. system. 2. A high-voltage voltage having a voltage fluctuation is input from a high-voltage overhead line by means of a pantograph or the like, and after performing power conversion, a low-voltage stable AC output is supplied to various low-voltage devices mounted on a vehicle. In a vehicle auxiliary power supply device in which a plurality of power supply devices are mounted on a vehicle composed of a plurality of vehicles, the rated capacity of the power supply device mounted on an intermediate vehicle is changed to the power supply device mounted on vehicles at both ends. By making it larger than the rated capacity of, if any of the power supply devices mounted on the vehicle at both ends is stopped,
Disconnect the load of the power supply unit that has stopped and provide backup power to the load from the power supply unit mounted on the intermediate vehicle.
When the power supply device of the intermediate vehicle stops due to a failure, the load of the power supply device that has failed is stopped, and the load is configured as a backup system that supplies power to the load from another healthy power supply device mounted on the intermediate vehicle. The backup power supply system, wherein even if the power supply device mounted on the intermediate vehicle fails, the power supply device mounted on the intermediate vehicle does not perform backup power supply to the load of the intermediate vehicle, thereby reducing the rated capacity of the entire power supply device. . 3. A high-voltage voltage having a voltage fluctuation is input from a high-voltage overhead line by means of a pantograph or the like, and after performing power conversion, a low-voltage stable AC output is supplied to various low-voltage devices mounted on the vehicle. In a vehicular auxiliary power supply device in which a plurality of power supply devices are mounted on a vehicle composed of a plurality of vehicles, switching means is provided in advance so that load divisions that the power supply device supplies in a healthy state can be divided. In the case where the power supply device has failed, after the power supply device in which the failure has occurred is disconnected from the load, the supply section of the load during normal operation is changed by the switching means, so that each healthy power supply device supplies backup power. A backup power supply system characterized in that the load capacity can be reduced by averaging as much as possible to reduce the rated capacity of the entire power supply device. 4. A high-voltage voltage having a voltage fluctuation is input from a high-voltage overhead line by means such as a pantograph, and after performing power conversion, a low-voltage stable AC output is supplied to various low-voltage devices mounted on a vehicle. A plurality of power supply devices, in a vehicle auxiliary power supply device mounted on a vehicle composed of a plurality of vehicles, the loads are connected to each other via switching means,
The output voltages of all of the power supply devices are set in a synchronous operation state in advance, and during normal operation, the switching unit is turned off to divide the loads, and power is supplied to the loads by all of the power supply devices in the synchronous operation state. If any power supply fails, all of the switching means that divide the load are turned on to perform parallel synchronous operation of a plurality of healthy power supplies to supply power to the load. And a backup power supply system for reducing the rated capacity of the entire power supply device. 5. A high-voltage voltage having a voltage fluctuation is input from a high-voltage overhead line by means of a pantograph or the like, and after performing power conversion, a low-voltage stable AC output is supplied to various low-voltage devices mounted on vehicles. In a vehicle auxiliary power supply device in which a plurality of power supply devices are mounted on a vehicle composed of a plurality of vehicles, the output voltages of all the power supply devices are set in a synchronized operation state in advance, and a plurality of power supply devices are supplied to a load of the vehicle. By supplying power by the parallel synchronous operation of the device, even if any of the power supply devices fails, the power supply from the healthy power supply device in the other synchronous operation state to the load is not interrupted,
Further, a backup power supply system characterized in that the rated capacity of the entire power supply device can be reduced. 6. A plurality of power supplies, a plurality of loads respectively connected to the plurality of power supplies via first switching means, and a plurality of loads respectively connected to the plurality of loads via second switching means. During normal operation, all of the first switching means are turned on, and the power supply is connected to the plurality of loads via the first switching means. The switching means is turned off and the emergency power supply is disconnected from the load;
Further, when any of the power supply devices fails, the first switching means connected to the load supplied with power from the failed power supply device is turned off, and only the second switching means corresponding to the load is turned on. A backup power supply system for supplying power to the load from the emergency power supply device. 7. A plurality of power supply devices, a plurality of loads respectively connected to the plurality of power supply devices via first switching means, and electric circuits between the loads and the first switching means are connected to each other. During normal operation, all the first switching means are turned on, and the power supply device is connected to the plurality of loads via the first switching means. The switching means is turned off, and when any of the power supply devices fails, only the first switching means connected to the failed power supply device is turned off, and only the second switching means connected to the load is turned off. A backup power supply system, which is turned on to supply power to the load from a healthy power supply device. 8. The power supply devices are connected to each other in a line via the first switching means and the second switching means, and the rated capacity of the intermediate power supply device is higher than the rated capacity of the power supply devices at both ends. The power supply device is set to be large, and when one of the power supply devices fails, power is supplied from an intermediate power supply device adjacent to the failed power supply device to the load that has been supplied from the failed power supply device. Item 7. The backup power supply system according to Item 7. 9. A plurality of power supplies, a plurality of loads connected to the plurality of power supplies via a first switching means, and a second switching means interposed in an electric circuit connecting the loads. During normal operation, all the first switching means are turned on, and the second switching means is selectively turned on and off so that all the loads are connected equally to the respective power supply devices, Further, when any one of the power supply devices fails, the first switching means connected to the failed power supply device is turned off, and the on / off state of the second switching means is selectively switched so that all of the loads are sound. A backup power supply system that supplies power as uniformly as possible from a simple power supply. 10. A plurality of power supply devices, a plurality of loads respectively connected to the plurality of power supply devices via first switching means, and electric lines between the loads and the first switching means are connected. A second switching unit, and connecting the electric paths between the power supply device and the first switching unit to set the output voltages of all the power supply devices in a synchronous operation state in advance; The second switching means is turned off and all the first switching means are turned on, so that the output of the power supply device in the synchronous operation state is distributed and supplied to all the loads, and any one of the power supply devices In the event of such a failure, the first switching means corresponding to the failed power supply device is turned off, and all the second switching means are turned on to supply power to all the loads from a healthy power supply device in a synchronized operation state. Features Backup power supply system to be. 11. A power supply device comprising: a plurality of power supplies; and a plurality of loads connected to the plurality of power supplies via first switching means, respectively, wherein electric paths between the loads and the first switching means are connected to each other. Connected and set the output voltages of all the power supply devices to the synchronous operation state in advance, and during normal operation, all the first switching means are turned on, and the outputs of all the power supply devices in the synchronous operation state Distributed to the load, and when any one of the power supply devices fails, the first switching means connected to the load corresponding to the failed power supply device is turned off, and the remaining healthy power supply devices are connected to all the loads. A backup power supply system characterized by supplying power.