JP2001016785A - Power system for railway train - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the sizes of the power units of a power system for railway train by reducing the values of the rated output capacities of the power units. SOLUTION: An output capacity computing section 3A computes an output capacity Po of a power unit, based on an output current Io and output voltage Eo of the unit. A comparison section 4 outputs a correction command Sp, when the output capacity Po exceeds a set capacity Ps. A drooping characteristic control section 5A outputs a drooping characteristic command F, indicating that a lower drooping characteristic must be selected instead rather than the previous drooping characteristic, based on the correction command Sp. An output voltage control section 6A outputs a voltage control command Es based on the new drooping characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway train power supply system for supplying electric power to a load of each vehicle by a plurality of power supply devices operated in parallel.

[0002]

2. Description of the Related Art As a method of supplying power to a load of each vehicle by a plurality of power supply devices, there are a separated operation method and a parallel operation method. The separated operation method is a method in which the power supply section is separated for each power supply device, and the parallel operation method is one in which the power supply section is not separated and power is supplied to all loads by the power supply apparatus that is operated in parallel. This is the method that we are trying to supply.

FIG. 25 is a schematic configuration diagram of a railway train power supply system employing such a parallel operation system.
In this figure, the train is composed of six vehicles T1 to T6, and power supplies 1A and 1B are mounted on vehicles T2 and T5. These power supply devices 1A and 1B are constituted by inverter devices and the like, and electric power generated by parallel operation of these power supply devices is supplied to the loads L1 to L6 of the respective vehicles via the lead-in line 2. ing. In addition,
In the case of the separation method, a contactor which is always off is provided between the load L3 and the load L4, and the power supply 1
A is in charge of loads L1 to L3, and power supply 1B is in charge of load L4.
~ L6.

[0004] In the case of the parallel operation system, the load assigned to each power supply device is not clearly divided, but is usually a value obtained by dividing the total load by the number of power supply devices. Further, it is required that the output capacities of the power supply devices be in a state of being balanced as much as possible during the parallel operation. In order to maintain such a balanced state, each power supply must have an output current
A function of controlling the output capacitance based on the drooping characteristics between output voltages is provided. FIG. 26 is an explanatory diagram showing this drooping characteristic. The drooping characteristic curve f has a slope θ, and the output current I
The output voltage Eo decreases as o increases.

In a normal state, the power supply 1A and the power supply 1
The rated output capacity is designed so that the ratio of the load assigned to B is 50:50. However, the ratio may change due to various conditions during the parallel operation and manufacturing errors of the respective power supply devices, and the balance between the two may be lost. In such a case, since the output current Io increases on the drooping characteristic curve f in the power supply device 1A, the output capacity of the power supply device 1A can be limited by decreasing the output voltage Eo in accordance with the increase.

[0006]

By the way, when designing a railway vehicle, various restrictions such as the external dimensions and weight of each device must be cleared, so that the power supply device is made as small as possible. However, in order to meet such requirements, it is necessary to reduce the value of the rated output capacity of each power supply device as much as possible. However, as described above, it is difficult to make the value of the rated output capacity of each power supply device smaller than a certain value or less in the related art because it is necessary to consider a case where the balance between the power supply devices is lost. Met.

That is, when the balance between the power supply devices is to be lost, it is possible to prevent the occurrence of an unbalanced state to some extent by controlling the output capacitance based on the drooping characteristic between the output current and the output voltage. However, when the unbalance state between the power supply devices is large (for example, as an extreme example, when the load ratio of the power supply device 1A and the power supply device 1B greatly changes from 50:50 to 60:40) However, it is no longer possible to prevent the occurrence of an unbalanced state by controlling the output capacity based on the drooping characteristics as described above. As described above, it is necessary to keep the power supply from the power supply to the load device even when the balance between the power supply devices is greatly lost. However, it has not been possible to achieve sufficient miniaturization of each power supply device.

The present invention has been made in view of the above circumstances, and it is possible to greatly reduce the value of the rated output capacity of each power supply device, and to achieve sufficient miniaturization of each power supply device. It aims to provide a power supply system for railway trains.

[0009]

As a means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that a power supply device is mounted on at least two or more predetermined vehicles of a plurality of vehicles constituting a train. In a power supply system for a railway train, each power supply device controls an output capacity based on a drooping characteristic between an output current and an output voltage, each of the power supply devices has an output capacity based on an output current and an output voltage. The output capacity calculation unit to be calculated, and the output capacity calculated by the output capacity calculation unit is compared with a preset set capacity,
A comparison unit that outputs a correction command when the output capacity exceeds the set capacity, a droop characteristic control unit that changes the droop characteristic based on the input of the correction command from the comparison unit, and a droop characteristic control unit that changes the droop characteristic. And an output voltage control unit that controls the output voltage based on the drooping characteristics.

According to a second aspect of the present invention, in the first aspect of the present invention, each of the power supply units delays a correction command output from the comparison unit for a predetermined time and inputs the correction command to the drooping characteristic control unit. Is provided.

According to a third aspect of the present invention, in the first aspect of the invention, each of the power supply devices is replaced with the comparing section.
A droop characteristic correction amount calculation unit that calculates a difference between the output capacitance calculated by the output capacitance calculation unit and a preset set capacitance, and calculates a correction amount for the droop characteristic based on the difference; The unit changes the drooping characteristic based on the correction amount calculated by the drooping characteristic correction amount calculation unit.

According to a fourth aspect of the present invention, in the third aspect of the present invention, each of the power supply devices delays a correction amount output from the drooping characteristic correction amount calculating section for a predetermined time to the drooping characteristic control section. A delay unit for inputting the signal is provided.

According to a fifth aspect of the present invention, a power supply device is mounted on at least two or more predetermined vehicles of a plurality of vehicles constituting a train, and each power supply device is based on a drooping characteristic between an output current and an output voltage. In the railway train power supply system adapted to control the output capacity, each of the power supply devices calculates an output capacity calculation unit that calculates an output capacity based on an output current and an output voltage, and the output capacity calculation unit calculates the output capacity. A comparison unit that compares an output capacity with a preset set capacity, and outputs a correction command to another power supply when the output capacity exceeds the set capacity, and a comparison unit of the other power supply. A droop characteristic control unit that changes the droop characteristic based on the correction command input, and an output voltage control unit that controls the output voltage based on the droop characteristic changed by the droop characteristic control unit. And wherein the door.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, each of the power supply units delays a correction command output from the comparison unit by a predetermined time and controls a drooping characteristic control unit of the other power supply unit. And a delay device for inputting the input signal to the input device.

According to a seventh aspect of the present invention, in the fifth aspect of the invention, each of the power supply devices is replaced with the comparing section.
A droop characteristic correction amount calculation unit for calculating a difference between the output capacitance calculated by the output capacitance calculation unit and a preset set capacitance, and calculating a correction amount for the droop characteristic based on the difference; The drooping characteristic controller of the device changes the drooping characteristic of the other power supply device based on the correction amount calculated by the drooping characteristic correction amount calculator.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, each of the power supply devices delays a correction amount output from the drooping characteristic correction amount calculation section by a predetermined time to generate the other power supply device. A delay device for inputting to the drooping characteristic control unit is provided.

According to a ninth aspect of the present invention, in the first aspect of the invention, any one of the power supply units receives an output capacity of all of the power supply units and calculates an average capacity of these output capacity units. Calculating the difference between the average capacity calculated by the average capacity calculation unit and the output capacity of each power supply, and outputting a correction command for this power supply when there is a power supply whose difference exceeds a set value. And a drooping characteristic control unit of the power supply device that exceeds the set value changes the drooping characteristic based on a correction command input from the judging unit.

According to a tenth aspect of the present invention, in the ninth aspect, the one power supply unit delays a correction command output from the determination unit by a predetermined time and exceeds the set value. A delay device for inputting to the drooping characteristic control unit is provided.

According to an eleventh aspect of the present invention, in the first aspect of the invention, any one of the power supplies receives an output capacity of all the power supplies and calculates an average capacity thereof. Calculating the difference between the average capacity calculated by the average capacity calculation unit and the output capacity of each power supply device, and when there is a power supply device in which the difference exceeds a set value, another power source other than the power supply device A determination unit that outputs a correction command to the device, and a drooping characteristic control unit of the other power supply device,
The drooping characteristic is changed based on a correction command input from the determination unit.

According to a twelfth aspect of the present invention, in the ninth aspect of the present invention, the one power supply unit delays a correction command output from the determination unit by a predetermined time to control the droop characteristic of the other power supply unit. And a delay unit for inputting to the unit.

The invention according to claim 13 is the invention according to claims 1 to 1
In the invention according to any one of the first to third aspects, the comparison unit or the drooping characteristic correction amount calculation unit includes a learning unit that updates the value of the set capacity to an optimum value.

According to a fourteenth aspect of the present invention, a power supply is mounted on at least two or more predetermined vehicles of a plurality of vehicles constituting a train, and each power supply is based on a drooping characteristic between an output current and an output voltage. In a railway train power supply system adapted to control output capacity, each of the power supply devices includes an output capacity calculation unit that calculates an output capacity based on an output current and an output voltage, and a correction command for the drooping characteristic or A drooping characteristic control unit that changes the drooping characteristic based on the input of the correction amount; and an output voltage control unit that controls an output voltage based on the drooping characteristic changed by the drooping characteristic control unit. The vehicle information control device installed in the driver's cab or in the cabin inputs the output capacity calculated by the output capacity calculation unit of each of the power supply devices via a transmission line, and determines the output capacity and the output capacity in advance. Based on the difference between the constant has been set capacity,
The power supply apparatus further includes a comparison unit or a droop characteristic correction amount calculation unit that outputs a correction command or a correction amount for the droop characteristic to the droop characteristic control unit of each of the power supply devices via a transmission line.

[0023] The invention according to claim 15 is the invention according to claims 1 to 1
4. The invention according to any one of 4, wherein each of the power supply devices is configured to perform the on-board test execution command from a vehicle information control device installed in a cab or a cabin of a vehicle, and A pattern generator that outputs a simulation signal about an output current and an output voltage, and based on an input of an output result of the output voltage control unit, determines whether or not the output capacity is appropriate according to the drooping characteristic changed by the drooping characteristic control unit. An output capacity appropriateness determination unit for transmitting the determination result to the vehicle information control device, wherein an on-vehicle test relating to the output capacity of each power supply device is enabled.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of a power supply device 1A according to the first embodiment. As shown in the figure, the power supply device 1A includes an output capacity calculating unit 3A and a comparing unit 4A.
A, a drooping characteristic control unit 5A, and an output voltage control unit 6A. It is assumed that the schematic configuration of the railway train power supply system according to this embodiment is the same as that in FIG.

The output capacity calculator 3A receives the output current Io and the output voltage Eo from a current detector and a voltage detector (not shown) and calculates the output capacity Po. The comparing unit 4A compares the output capacity Po calculated by the output capacity calculating unit 3A with a preset set capacity Ps,
When the output capacity Po exceeds the set capacity Ps, the correction command S
p is output. Drooping characteristic control unit 5A
Is configured to output a drooping characteristic command F to the output voltage control unit 6A when a correction command Sp is input from the comparison unit 4A. The output voltage controller 6A determines an output voltage based on the drooping characteristic command F, and outputs the voltage control command Es to an inverter control circuit (not shown).

FIG. 2 is an explanatory diagram showing the contents of the drooping characteristic which is controlled by the drooping characteristic control unit 5A. As shown in this figure, two drooping characteristics f0 and f1 are set, and the output voltage is normally controlled using the drooping characteristic f0. Although the slopes of these drooping characteristics f0 and f1 are θ0, the gradient θ0 is smaller than the gradient θ of the drooping characteristic f in the prior art shown in FIG. The drooping characteristic command F output from the drooping characteristic control unit 5A to the output voltage control unit 6A is a command to select one of these two drooping characteristics f0 and f1.

Next, the operation of FIG. 1 will be described with reference to the time chart of FIG. The output capacity calculator 3A calculates the output capacity Po based on the input of the output current Io and the output voltage Eo at predetermined intervals, and the comparator 4A compares the output capacity Po with the set capacity Ps. The output capacity Po tends to increase with the passage of time as shown in FIG.
Exceeds the set capacity Ps, the comparator 4A outputs a correction command Sp to the drooping characteristic controller 5A. Drooping characteristic control unit 5A
Receives the correction command Sp and outputs a drooping characteristic command F to the output voltage control unit 6A as a command to select the drooping characteristic f1 instead of the drooping characteristic f0 selected up to that time. The output voltage control section 6A thereafter outputs a voltage control command Es based on the drooping characteristic f1.

The set capacity Ps is a capacity when all the loads L1 to L6 are equally shared by the two power supplies 1A and 1B.
The fact that the output capacity Po on the power supply device 1A side exceeds the set capacity Ps means that the output sharing ratio (or load sharing ratio) of the power supply device 1A is higher than that of the power supply device 1B. . In such a state, the power supply 1
When the output voltage control is performed by lowering the drooping characteristic on the A side from f0 to f1, the potential difference between the output unit of the power supply device 1A and each load becomes small, and it is difficult to supply power from the power supply device 1A to each load. Become. As a result, the output capacity Po of the power supply device 1A decreases, while the output capacity of the power supply device 1B increases, and the output sharing ratios of the two become equal.

As described above, the gradient θ0 of the drooping characteristic shown in FIG. 2 is smaller than the gradient θ of the conventional drooping characteristic shown in FIG. 26. Means that the range of change of the output voltage Eo with respect to can be reduced, that is, the value of the rated output capacity can be reduced. Therefore, it is possible to reduce the size of the power supply device 1A (and the power supply device 1B).

FIG. 4 shows a power supply device 1 according to the second embodiment.
FIG. 2 is a block diagram showing a configuration of A. FIG. 4 differs from FIG. 1 in that a delay unit 7A is provided between the comparison unit 4A and the drooping characteristic control unit 5A. The delay unit 7A outputs a delay correction command Sq delayed by a predetermined time (10 seconds in this embodiment) to the drooping characteristic control unit 5A when the correction command Sp is input from the comparison unit 4A. is there. FIG. 5 is a time chart showing the timing at which the delay correction command Sq is output. As shown in this figure, a delay correction command Sq is issued 10 seconds after the correction command Sp issued when the output capacity Po exceeds the set capacity Ps.

In general, a power supply device has an "overload withstand capability", and it is permissible for a short time even if the output capacity exceeds a rated value. The present embodiment utilizes such general characteristics of the power supply device, and if the device has a 10-second overload withstand capability, the switching of the drooping characteristic is performed for a transient output capacity increase within 10 seconds. Is not performed. Therefore, in a situation where the transient output capacity change frequently occurs, it is possible to prevent the drooping characteristic from being switched unnecessarily following the output capacity change, and to perform stable control. it can.

FIG. 6 shows a power supply device 1 according to the third embodiment.
FIG. 2 is a block diagram showing a configuration of A. FIG. 6 differs from FIG. 1 in that a drooping characteristic correction amount calculation unit 8A is provided instead of the comparison unit 4A. The drooping characteristic correction amount calculation unit 8A uses the rated capacity Pn as the set capacity Ps.
In the first embodiment of FIG. 1, the comparison unit 4A simply compares the output capacity Po with the set capacity Ps and outputs a correction command Sp when the former exceeds the latter, and the drooping characteristic control unit 5A prepares in advance. One is selected from the drooping characteristics. On the other hand, in this embodiment, the output capacitance Po
Is larger than the rated capacity Pn, the difference Pn-Po between them is calculated, and the correction amount Sr of the drooping characteristic is calculated based on the difference Pn-Po. The drooping characteristic control unit 5A corrects the drooping characteristic based on the correction amount Sr.

FIG. 7 is an explanatory diagram showing the relationship between the correction amount Sr calculated by the drooping characteristic correction amount calculation section 8A in FIG. 6 and the difference Pn-Po. As shown in this figure, as the difference Pn-Po approaches zero, that is, the output capacity Po becomes larger than the rated capacity Pn.
, The value of the correction amount Sr increases. For example, when the difference Pn-Po is Pm1, Pm2 (Pm1> Pm2), the correction amount Sr
Are Sr1 and Sr2 (Sr1 <Sr2), respectively. FIG.
FIG. 9 is an explanatory diagram showing the contents of the drooping characteristic corrected based on the correction amount Sr. The drooping characteristic curve f0 is a curve before correction, the drooping characteristic curve f1 is a curve obtained by moving f0 by the correction amount Sr1,
The drooping characteristic curve f2 is obtained by moving f0 by the correction amount Sr2. In the present embodiment, the drooping characteristic control unit 5A corrects the drooping characteristic based on the correction amount Sr calculated by the drooping characteristic correction amount calculation unit 8A, so that a drooping characteristic more suited to an actual situation is obtained. be able to.

FIG. 9 shows a power supply device 1 according to the fourth embodiment.
FIG. 2 is a block diagram showing a configuration of A. 9 is different from FIG. 6 in that the drooping characteristic correction amount calculation unit 8A and the drooping characteristic control unit 5A
And a delay unit 7A is provided between the two. The delay unit 7A receives the correction amount Sr from the drooping characteristic correction amount calculation unit 8A.
Is input, a delay correction amount Ss which is delayed by a predetermined time (10 seconds in the present embodiment) from this is output to the drooping characteristic control unit 5A. FIG. 10 is a time chart showing the timing at which the delay correction amount Ss is output. The purpose of providing the delay unit 7A is the same as the purpose already described in FIG.

In each of the above-described embodiments, the power supply device 1A is changed by changing the drooping characteristic on the power supply device 1A side, that is, the drooping characteristic on the side where the output capacitance is increased.
Thus, the balance of the output sharing ratio between A and the power supply device 1B was maintained. However, when the output capacity of the power supply device 1A increases, the balance can be maintained by changing the drooping characteristic of the power supply device 1B in a direction to increase the drooping characteristic. This is because if the output voltage control is performed by increasing the drooping characteristic of the power supply 1B,
Since the potential difference between the output section of B and each load increases,
This makes it easier to supply power from the power supply device 1B to each load. Therefore, the output capacity of the power supply device 1B increases and the output capacity of the power supply device 1A decreases, and the output sharing ratios of the two are equalized. 11 to 1
Reference numeral 4 denotes a configuration in which the drooping characteristic of the other power supply device is changed instead of the power supply device having the increased output capacity.

That is, FIG. 11 is a block diagram showing a configuration of a power supply 1A and a power supply 1B according to the fifth embodiment. The components of the power supply device 1A in FIG.
1 is similar to the power supply device 1A in FIG.
Is output to the drooping characteristic control unit 5B of the other power supply device 1B, and the drooping characteristic control unit 5A receives the correction instruction Sp from the comparison unit 4B of the other power supply device 1B. Is different.

When the output capacity Po on the side of the power supply 1A exceeds the set capacity Ps, the comparing section 4A (at this time, the output capacity Po of the power supply 1B is less than or equal to the set capacity Ps). A correction command Sp is output to the drooping characteristic control unit 5B, and the drooping characteristic control unit 5B changes the drooping characteristic on the side of the power supply device 1B based on the correction command Sp. The output voltage control unit 6B controls the output voltage of the power supply device 1B based on the drooping characteristics thus changed. As a result, the output capacity Po of the power supply device 1B increases and approaches the set capacity Ps, while the output capacity Po of the power supply device 1A also increases.
Decreases and approaches the set capacitance Ps.

FIG. 12 is a block diagram showing a configuration of a power supply 1A and a power supply 1B according to the sixth embodiment.
FIG. 12 differs from FIG. 11 in that it is between the comparing unit 4A and the drooping characteristic control unit 5A, and between the comparing unit 4B and the drooping characteristic control unit 5B.
Are provided with delay units 7A and 7B, respectively. The detailed configuration and operation of FIG. 12 can be easily inferred from the description of FIGS. 4 and 11 described above, and a description thereof will be omitted.

FIG. 13 is a block diagram showing a configuration of a power supply 1A and a power supply 1B according to the seventh embodiment.
The components of the power supply device 1A in this figure are the same as those of the power supply device 1A in FIG. 6, but the correction amount Sr from the drooping characteristic correction amount calculation unit 8A is output to the drooping characteristic control unit 5B of the other power supply device 1B. Another difference is that the drooping characteristic control unit 5A receives the correction amount Sr from the drooping characteristic correction amount calculation unit 8B of the other power supply device 1B.

Then, the drooping characteristic correction amount calculating section 8A determines that the output capacity Po on the power supply 1A side exceeds the set capacity Ps (at this time, the output capacity Po of the power supply 1B is less than the set capacity Ps. ), The correction amount Sr is output to the drooping characteristic control unit 5B, and the drooping characteristic control unit 5B changes the drooping characteristic on the power supply device 1B side in a direction to increase based on the correction amount Sr. The output voltage control unit 6B controls the output voltage of the power supply device 1B based on the drooping characteristics thus changed. As a result, the output capacity Po of the power supply 1B increases and approaches the set capacity Ps, while the output capacity Po of the power supply 1A also decreases and approaches the set capacity Ps.

FIG. 14 is a block diagram showing a configuration of a power supply 1A and a power supply 1B according to the eighth embodiment.
FIG. 14 differs from FIG. 13 in that the drooping characteristic correction amount calculation unit 8
A point is that delay units 7A and 7B are provided between A and the drooping characteristic control unit 5A and between the drooping characteristic correction amount calculation unit 8A and the drooping characteristic control unit 5B, respectively. Since the detailed configuration and operation of FIG. 14 can be easily inferred from the description of FIGS. 9 and 13 described above, the description thereof will be omitted.

FIG. 15 is a block diagram showing a configuration of a power supply 1A, a power supply 1B, and a power supply 1C according to the ninth embodiment. The schematic configuration of the railway train power supply system according to the first to eighth embodiments described above is similar to that of FIG. 25, and the number of power supply devices is two, 1A and 1B. In this case, the power supply device 1C is added to make a total of three units. In FIG. 15, components such as a comparison unit and an output voltage control unit in each power supply device are omitted for convenience of illustration.

The power supply unit 1A in FIG. 15 has a configuration in which an average capacity calculation unit 9 and a judgment unit 10 are added to the power supply unit 1A in FIG. 1 (or FIG. 6).
Have the same configuration as the power supply 1A in FIG. 1 (or FIG. 6).

The average capacity calculator 9 is provided with the output capacity calculator 3.
The output capacitances Pa, Pb, and Pc from A, 3B, and 3C are input, and the average value Pv of these is output to the determination unit 10. The determination unit 10 receives the average value Pv, the output capacitances Pa, Pb, Pc, and a preset reference value Pt, and determines the magnitude relationship between Pa−Pv, Pb−Pv, Pc−Pv and Pt. Is determined. Then, the determination unit 10 outputs correction commands (or correction amounts) Sa, Sb, Sc to the drooping characteristic control units 5A, 5B, 5C in accordance with the determination results.

FIG. 16 is a time chart according to an example of the operation of FIG. In this example, at time t1, Pa−
Since only Pv has exceeded the reference value Pt, the determination unit 10 outputs the correction command Sa only to the drooping characteristic control unit 5A. The drooping characteristic control unit 5A performs the drooping characteristic f0 shown in FIG.
Was output to the output voltage control unit, but when the correction command Sa was input, a droop characteristic command based on the droop characteristic f2 set lower than the droop characteristic f0 was output to the output voltage control unit. Output. This allows
The output capacity Pa of the power supply device 1A decreases and approaches the average value Pv, and the output capacities Pb and Pc of the power supply devices 1B and 1C increase and approach the average value Pv.

FIG. 18 is a block diagram showing the configuration of a power supply 1A, a power supply 1B, and a power supply 1C according to the tenth embodiment. FIG. 18 differs from FIG. 15 in that a delay unit 7A is provided between the determination unit 10 and the drooping characteristic control unit 5A. That is, when the correction commands Sa, Sb, Sc are input from the determination unit 10, the delay unit 7A sends the delay correction commands Sa1, Sb1, Sc1 delayed by 10 seconds to the drooping characteristic control units 5A, 5B, 5C, respectively. Output.

FIG. 19 is a time chart according to an example of the operation of FIG. In this example, Pa−Pv is equal to the reference value Pt.
After a lapse of 10 seconds from the time t1 at which the delay time exceeds the delay time, the delay unit 7A outputs the delay correction command Sa1.

FIGS. 20 and 21 are time charts showing an example of the operation of each power supply device according to the eleventh and twelfth embodiments, respectively. A block diagram showing the configuration of each power supply device in these embodiments will be omitted.

That is, the eleventh embodiment has the same configuration as the ninth embodiment shown in FIG. 15, but the judging unit 10 determines that Pa-Pv exceeds the reference value Pt at time t1. In this case, instead of outputting the correction command Sa to the drooping characteristic control unit 5A, the correction commands Sb and Sc are output to the drooping characteristic control units 5B and 5C. Drooping characteristic control units 5B, 5C
Has output the drooping characteristic command based on the drooping characteristic f0 shown in FIG. 17 to the respective output voltage control units, but when the correction commands Sb and Sc are input, the drooping characteristic command is set higher than the drooping characteristic f0. The drooping characteristic command based on the drooping characteristic f1 is output to the output voltage control unit. Thus, as in the case of the ninth embodiment in FIG. 15, the output capacity Pa of the power supply 1A decreases and approaches the average value Pv, and the output capacities Pb and Pc of the power supply 1B and 1C increase. To approach the average value Pv.

The twelfth embodiment corresponds to the tenth embodiment shown in FIG.
It has the same configuration as that of the embodiment. In the example of FIG. 21, the delay unit 7A outputs the delay correction commands Sb1 and Sc1 10 seconds after the time t1 when Pa-Pv exceeds the reference value Pt.

FIG. 22 is a block diagram showing a configuration of a power supply device 1A according to the thirteenth embodiment. FIG. 22 differs from FIG. 1 in that the comparing unit 4A has a learning unit 11 for updating the set capacity Ps. This learning means 1
1 can be provided in the drooping characteristic correction amount calculation unit 8A in FIG. According to this embodiment, the comparison unit 4A
Can always update the set capacity Ps to an optimum value based on past control data.

FIG. 23 is a block diagram showing a configuration of a power supply device 1A, a power supply device 1B, and a vehicle information control device 12 according to the fourteenth embodiment. The vehicle information control device 12 includes:
This device is installed in the driver's cab or in the cabin, and manages information on all vehicles. In this embodiment, the function of the comparison unit in each power supply device is provided in the vehicle information control device 12,
Regarding the output capacity of each power supply unit, the vehicle information control unit 12
The configuration allows centralized management.

That is, the vehicle information control device 12 has the comparison unit 4. The comparison unit 4 is connected to the power supply 1
The output capacitances Po are input from the output capacitance calculation units 3A and 3B of the A and 1B via the transmission line, and when the output capacitances Po exceed the set capacitances Ps set for the respective output capacitances Po, the drooping characteristics thereof. The correction command Sp is output to the control unit 5A or 5B via a transmission line.
In FIG. 23, the configuration in which the vehicle information control device 12 includes the comparison unit 4 is shown, but the vehicle information control device 12 may include the drooping characteristic correction amount calculation unit 8 instead of the comparison unit 4.

FIG. 24 is a block diagram showing the configuration of the power supply device 1A and the vehicle information control device 12 according to the fifteenth embodiment. This embodiment has a configuration in which a so-called on-board test can be performed using a simulation signal without actually operating a train.

That is, the power supply device 1A according to this embodiment includes the output capacity calculation unit 3A,
Comparison section 4A, drooping characteristic control section 5A, output voltage control section 6A
In addition to the components described above, a pattern generator 13A and an output capacity suitability determining unit 14A are newly added. The vehicle information control device 12 has a monitor unit 15.

When the vehicle information control device 12 outputs the on-board test execution command to the pattern generator 13A via the transmission line, the pattern generator 13A outputs the simulation signals IOM and EOM for the output current and the output voltage to the output capacity. The output capacity is output to the calculation unit 3A, and the output capacity calculation unit 3A calculates the output capacity based on these simulation signals. Comparison unit 4A, drooping characteristic control unit 5
A and the output voltage control unit 6A perform the same operation as described above, and the output capacity appropriateness determination unit 14A outputs the output voltage control unit 6A.
From the control result of A, it is determined whether the output capacity of the power supply device 1A is appropriate. This determination result is input to the monitor unit 15 via the transmission path, and is displayed on the display screen of the monitor unit 15. According to the present embodiment, it is possible to execute a simulation relating to output capacity control assuming various load conditions before the train actually operates. Further, it is possible to easily and surely check the output capacity control before delivery from the vehicle manufacturer to the railway company.

In each of the embodiments described above, it is not specified whether the power supply device is used for a DC input vehicle or an AC input vehicle. However, the power supply device of the present invention is used for any of them. It is possible.

Further, in each of the above-described embodiments, the example in which the direction in which the drooping characteristic is changed is the vertical direction as shown in FIGS. 2 (θ0) may be changed.

[0059]

As described above, according to the present invention, when the output capacity of a certain power supply exceeds the set capacity and the balance of the output sharing ratio with another power supply is lost, the power supply A good balance can be maintained by changing the drooping characteristics of the power supply side or other power supply side, so that the value of the rated output capacity of each power supply can be greatly reduced, thereby Sufficient miniaturization can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a power supply device 1A according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the details of a drooping characteristic which is a control target of a drooping characteristic control unit 5A in FIG. 1;

FIG. 3 is a time chart for the operation of FIG. 1;

FIG. 4 is a block diagram showing a configuration of a power supply device 1A according to a second embodiment of the present invention.

FIG. 5 is a time chart for the operation of FIG. 4;

FIG. 6 is a block diagram showing a configuration of a power supply device 1A according to a third embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a relationship between a correction amount Sr calculated by a drooping characteristic correction amount calculation unit 8A in FIG. 6 and a difference Pn-Po.

FIG. 8 is an explanatory diagram showing the details of the drooping characteristic corrected based on the correction amount Sr in FIG. 7;

FIG. 9 is a block diagram showing a configuration of a power supply device 1A according to a fourth embodiment of the present invention.

FIG. 10 is a time chart for the operation of FIG. 9;

FIG. 11 shows a power supply device 1A according to a fifth embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a power supply device 1B.

FIG. 12 shows a power supply device 1A according to a sixth embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a power supply device 1B.

FIG. 13 shows a power supply device 1A according to a seventh embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a power supply device 1B.

FIG. 14 is a power supply device 1A according to an eighth embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a power supply device 1B.

FIG. 15 shows a power supply device 1 according to a ninth embodiment of the present invention.
A is a block diagram showing a configuration of a power supply device 1B and a power supply device 1C.

FIG. 16 is a time chart for the operation of FIG. 15;

FIG. 17 is an explanatory diagram showing the details of a drooping characteristic that is a control target of the drooping characteristic control unit 5A in FIG. 15;

FIG. 18 is a power supply device 1 according to a tenth embodiment of the present invention.
A is a block diagram showing a configuration of a power supply device 1B and a power supply device 1C.

FIG. 19 is a time chart for the operation of FIG. 18;

FIG. 20 is a time chart for the operation of each power supply device according to the eleventh embodiment of the present invention.

FIG. 21 is a time chart for the operation of each power supply device according to the twelfth embodiment of the present invention.

FIG. 22 shows a power supply device 1 according to a thirteenth embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of A.

FIG. 23 is a power supply device 1 according to a fourteenth embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of A, a power supply device 1B, and a vehicle information control device 12.

FIG. 24 is a power supply device 1 according to a fifteenth embodiment of the present invention.
A is a block diagram showing the configuration of the vehicle information control device 12

FIG. 25 is a schematic configuration diagram of a power supply system for a railway train according to a conventional example.

FIG. 26 is an explanatory diagram of a drooping characteristic of a power supply device according to a conventional example.

[Explanation of symbols]

 1A, 1B, 1C Power supply device 2 Lead-in line 3A, 3B, 3C Output capacity calculation unit 4A, 4B Comparison unit 5A, 5B, 5C Drop characteristic control unit 6A, 6B Output voltage control unit 7A, 7B Delay unit 8A, 8B Drop Characteristic correction amount calculation unit 9 Average capacity calculation unit 10 Judgment unit 11 Learning means 12 Vehicle information control device 13A Pattern generator 14A Output capacity suitability determination means 15 Monitor unit T1 to T6 Vehicle L1 to L6 Load f, f0, f1, f2 droop Characteristics Io Output current Eo Output voltage Po Output capacity Ps Set capacity Pn Rated capacity Sp Correction command Sq Delay correction command Sr Correction amount Ss Delay correction amount F Droop characteristic command Es Voltage control command Pa, Pb, Pc Output capacity Pv Average value Pt Reference Value Sa, Sb, Sc Correction command Sa1, Sb1, Sc1 Delay correction command

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Rinsho Ishikawa 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in the Fuchu factory of Toshiba Corporation (reference) 5G066 HA30 HB01

Claims (15)

[Claims] 1. A power supply device is mounted on at least two or more predetermined vehicles of a plurality of vehicles constituting a train, respectively.
In a railway train power supply system in which each power supply device controls an output capacity based on a drooping characteristic between an output current and an output voltage, each of the power supply devices calculates an output capacity based on an output current and an output voltage. An output capacity calculator that performs a comparison between the output capacity calculated by the output capacity calculator and a preset set capacity, and outputs a correction command when the output capacity exceeds the set capacity; A droop characteristic control unit that changes the droop characteristic based on an input of a correction command from a comparison unit, and an output voltage control unit that controls an output voltage based on the droop characteristic changed by the droop characteristic control unit. A power supply system for a railway train, characterized in that: 2. The power supply device according to claim 1, further comprising: a delay unit that delays a correction command output from the comparison unit by a predetermined time and inputs the correction command to the drooping characteristic control unit. Power supply system for railway trains. 3. The power supply device according to claim 1, wherein a difference between the output capacity calculated by the output capacity calculation unit and a predetermined set capacity is obtained in place of the comparison unit, and the difference between the output characteristics calculated based on the difference is determined. A drooping characteristic correction amount calculating unit that calculates a correction amount, wherein the drooping characteristic control unit changes the drooping characteristic based on the correction amount calculated by the drooping characteristic correction amount calculating unit. The power supply system for a railway train according to claim 1. 4. The power supply device according to claim 1, further comprising: a delay unit that delays a correction amount output from the drooping characteristic correction amount calculation unit for a predetermined time and inputs the correction amount to the drooping characteristic control unit. Item 3. A power supply system for a railway train according to item 3. 5. A power supply device is mounted on at least two or more predetermined vehicles of a plurality of vehicles constituting a train, respectively.
In a railway train power supply system in which each power supply device controls an output capacity based on a drooping characteristic between an output current and an output voltage, each of the power supply devices calculates an output capacity based on an output current and an output voltage. An output capacity calculator that performs a comparison between the output capacity calculated by the output capacity calculator and a preset set capacity, and issues a correction command to another power supply device when the output capacity exceeds the set capacity. A comparing unit that outputs, a drooping characteristic control unit that changes the drooping characteristic based on an input of a correction command from the comparing unit of the another power supply device, and an output voltage based on the drooping characteristic that the drooping characteristic control unit changes. A power supply system for a railway train, comprising: an output voltage control unit that performs control. 6. The power supply device further includes a delay unit that delays a correction command output from the comparison unit by a predetermined time and inputs the correction command to a drooping characteristic control unit of the another power supply unit. The power supply system for a railway train according to claim 5, wherein 7. Each of the power supply devices obtains a difference between an output capacity calculated by the output capacity calculating unit and a preset set capacity instead of the comparing unit, and based on the difference, calculates a difference in the drooping characteristic. A droop characteristic correction amount calculating unit that calculates a correction amount, wherein the droop characteristic control unit of the other power supply device changes the droop characteristic of the other power device based on the correction amount calculated by the droop characteristic correction amount calculation unit. The power supply system for a railway train according to claim 5, wherein: 8. The power supply device further includes a delay unit that delays a correction amount output from the drooping characteristic correction amount calculation unit by a predetermined time and inputs the correction amount to a drooping characteristic control unit of the other power supply device. The power supply system for a railway train according to claim 7, wherein: 9. One of the power supply devices receives an output capacity of all the power supply devices, calculates an average capacity of the output capacity, calculates an average capacity calculated by the average capacity calculation unit, Calculating a difference between the output capacity of the device and a power supply device in which the difference exceeds a set value; and a determination unit that outputs a correction command to the power device, and The power supply system for a railway train according to claim 1, wherein the drooping characteristic control unit of the power supply device changes the drooping characteristic based on a correction command input from the determination unit. 10. The power supply device according to claim 1, further comprising: a delay unit for delaying a correction command output from the determination unit for a predetermined time and inputting the correction command to a drooping characteristic control unit of the power supply device that exceeds the set value. The power supply system for a railway train according to claim 9, wherein: 11. The power supply device according to claim 1, wherein the output capacities of all the power supply devices are input, and an average capacity calculation unit that calculates an average capacity thereof is provided. Calculating a difference between the output capacity of the device and a determination unit that outputs a correction command to another power device other than the power device when there is a power device in which the difference exceeds a set value; The power supply system for a railway train according to claim 1, wherein the drooping characteristic control unit of the other power supply device changes the drooping characteristic based on a correction command input from the determination unit. 12. The power supply device according to claim 1, further comprising a delay unit that delays a correction command output from the determination unit by a predetermined time and inputs the correction instruction to a drooping characteristic control unit of the other power supply device. The power supply system for a railway train according to claim 9. 13. The apparatus according to claim 1, wherein the comparing section or the drooping characteristic correction amount calculating section has learning means for updating the value of the set capacity to an optimum value. A power supply system for a railway train according to item 1. 14. A power supply device is mounted on at least two or more predetermined vehicles of a plurality of vehicles constituting a train, and each power supply device controls an output capacity based on a drooping characteristic between an output current and an output voltage. In the railway train power supply system, each of the power supply devices is configured to calculate an output capacity based on an output current and an output voltage, and an input of a correction command or a correction amount for the drooping characteristic. A drooping characteristic control unit that changes the drooping characteristic, and an output voltage control unit that controls an output voltage based on the drooping characteristic changed by the drooping characteristic control unit. The installed vehicle information control device inputs, via a transmission line, the output capacity calculated by the output capacity calculation unit of each of the power supply devices, and outputs the output capacity and a preset set capacity. A comparison unit or a droop characteristic correction amount calculation unit that outputs a correction command or a correction amount for the droop characteristic to the droop characteristic control unit of each of the power supply devices via a transmission path based on the difference. Characteristic power supply system for railway trains. 15. The power supply apparatus according to claim 1, wherein said power supply unit outputs said output current and output voltage to said output capacity calculation unit based on an on-board test execution command from a vehicle information control device installed in a driver's cabin or a cabin of a vehicle. And a pattern generator that outputs a simulation signal for, based on an input of an output result of the output voltage control unit, determines whether or not the output capacitance is appropriate according to the drooping characteristic changed by the drooping characteristic control unit, and determines the determination result. 15. An output capacity appropriateness determination unit to be sent to the vehicle information control device, comprising: an on-board test relating to the output capacity of each power supply device. 15. The railway train according to claim 1, wherein Power system.