JP2001157385A - Regenerative electric power absorbing and storing system for railway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the best of regenerative electric power that occurs continuously by absorbing and storing it reliably with no complex structure and to avoid the annulment of regeneration. SOLUTION: This system is provided with power converting devices 1, 2 that convert into a specified voltage the regenerative electric power generated by an electric vehicle that travels by receiving electric power supplied from feeders 18, 19 at a DC substation for a railway, a water-electrolyzing device 3 that is provided with a pair of electrodes of an anode 3a and a cathode 3b and that electrolyzes demineralized water by chemical reactions using the outputs from the power converting devices 1, 2 to ionize it into hydrion and oxygen ion, and a storing device 4 that stores the hydrion and oxygen ion ionized by the water-electrolyzing device 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for receiving and supplying electric power supplied from a feeder line in a DC substation for electric railways and for absorbing and storing regenerative electric power generated from a traveling vehicle. The present invention relates to a regenerative electric power absorption and storage system for electric railways in which generated energy is ionized and stored.

[0002]

2. Description of the Related Art Conventionally, for example, in a DC substation for electric railways, regenerative power generated from a regenerative vehicle (hereinafter simply referred to as a vehicle) that travels while receiving power supplied from a feeder line is used effectively. For this purpose, a regenerative power absorbing device is provided.

FIG. 7 is a schematic diagram showing an example of a configuration of a regenerative power absorbing device of this type in a conventional DC substation for railways.

In FIG. 7, a vehicle 20 travels by receiving power supplied from positive and negative feeders 18 and 19 in a DC substation for railways.

[0005] The regenerative power absorbing device operates when the regenerative power generated from the vehicle 20 reaches a certain level of power or more, and the regenerative power generated from the vehicle 20 is generated by a regenerative inverter device 11 including static switching elements. Is converted to AC power, further transformed by an inverter transformer 12 and supplied to a high-voltage distribution load 14 for consumption.

FIG. 8 is a schematic diagram showing another example of a configuration of a regenerative power absorbing device of this type in a conventional DC substation for railways. The same elements as those in FIG. The description is omitted, and only different portions are described here.

In FIG. 8, a regenerative power absorbing device is operated from a vehicle 20 by a regenerative inverter device 11 comprising a stationary switching element, which operates when regenerative power generated from a vehicle 20 reaches a certain level of power or more. The generated regenerative power is converted into AC power and supplied to the AC generator motor 10 and the flywheel 9 for consumption.

FIG. 9 is a schematic diagram showing another example of the configuration of a regenerative power absorbing device in this type of conventional DC substation for railways. The same elements as those in FIG. 7 and FIG. A description thereof is omitted, and only different portions will be described here.

In FIG. 9, a regenerative power absorbing device resistively regenerates regenerative power generated from vehicle 20 via stationary switching element 1 which operates when regenerative power generated from vehicle 20 reaches a voltage equal to or higher than a predetermined value. It is configured to be supplied to the load 13 and consumed.

[0010]

However, as shown in FIG. 7, when the regenerative inverter device 11 is used, high-voltage power distribution is usually performed due to the problem that harmonics flow out when returned to the power company. The regenerative electric power is consumed by the load 14, and the regenerative electric power is
% Consumption, resulting in regenerative lapse.

As shown in FIG. 8, when the regenerative power is consumed by the AC generator motor 10 and the flywheel 9, once the flywheel 9 rotates once, continuous regenerative power cannot be absorbed. , May cause regenerative lapse.

Further, as shown in FIG.
When the regenerative electric power is consumed by the above, the number of heat radiating facilities for converting the regenerative electric power into heat via the resistance load 13 increases, and there is an environmental problem due to noise and heat radiation of the blower device.

An object of the present invention is to ionize and store energy generated by regenerative electric power, thereby reliably absorbing and storing continuously generated regenerative electric power without complicating the configuration, and effectively utilizing the electric power. An object of the present invention is to provide an environment-friendly regenerative electric power absorption / storage system for electric railways, which can achieve regenerative lapse and can also eliminate regeneration lapse.

[0014]

In order to achieve the above object, according to the first aspect of the present invention, a vehicle that receives power supplied from a feeder line in a DC substation for railways and generates power is generated. In a system that absorbs and stores regenerative power, a power converter that converts regenerative power generated from a vehicle to a specified voltage and outputs the same is provided with a pair of anode and cathode electrodes, and uses an output from the power converter. A water electrolysis device that performs electrolysis of pure water by a chemical reaction and ionizes into hydrogen ions and oxygen ions, and a storage device that separately stores hydrogen ions and oxygen ions ionized by the water electrolysis device, respectively. It has.

Therefore, in the regenerative electric power absorption and storage system according to the first aspect of the present invention, the regenerative electric power generated from the vehicle is ionized into hydrogen ions and oxygen ions and stored. However, it is possible to reliably absorb and store the continuously generated regenerative electric power, thereby enabling effective use of the regenerative electric power and reduction of regenerative lapse.

According to a second aspect of the present invention, in the electric railway regenerative electric power absorption and storage system according to the first aspect of the present invention, hydrogen ions and oxygen ions stored by the storage device are introduced as fuel, A fuel cell that generates power by performing an electrochemical reaction between the two and outputs DC power is added, and the DC power output from the fuel cell is supplied to an emergency power generation load as needed.

Therefore, in the regenerative electric power absorption and storage system according to the second aspect of the present invention, the hydrogen ions and the oxygen ions which are ionized and stored by the regenerative electric power are used as the fuel of the fuel cell. Secondary use of regenerative electric power is possible as a power generation facility for use, and more effective use of regenerative electric power can be achieved.

Further, in the invention according to claim 3, in the regenerative electric power absorption and storage system for railways according to the invention according to claim 2, when the load of the high-voltage distribution load reaches a predetermined value or more, the fuel is operated. An inverter device that converts DC power output from the battery to AC power and supplies the AC power to a high-voltage distribution load is added.

Therefore, in the regenerative electric power absorption and storage system according to the third aspect of the present invention, the hydrogen ions and the oxygen ions, which are ionized and stored by the regenerative electric power, are used as the fuel of the fuel cell, and the fuel cell uses the hydrogen ions and the oxygen ions. The DC power is converted to AC power by an inverter device and supplied to the high-voltage distribution load, so that when the load of the high-voltage distribution load is larger than a predetermined value, the regenerative power is consumed by the high-voltage distribution load equipment, and When the load of the distribution load is smaller than a predetermined value, it becomes possible to store the regenerative electric power by ionizing it into hydrogen ions and oxygen ions without consuming (wasting) the regenerative electric power. Storage and secondary use.

According to a fourth aspect of the present invention, in the regenerative electric power absorption and storage system according to the second aspect of the present invention, the feeder voltage of the feeder line is constantly monitored, and the feeder voltage is set to a predetermined value. A second power converter that operates when reaching the following and converts the DC power output from the fuel cell to a specified voltage and returns it to the electric wire is added.

Therefore, in the regenerative electric power absorption / storage system for railways according to the fourth aspect of the present invention, the hydrogen ions and the oxygen ions which are ionized and stored by the regenerative electric power are used as the fuel for the fuel cell, and the fuel cell uses The DC power of the feeder is converted to a specified voltage by the second power converter and returned to the feeder, so that the feeder voltage of the feeder is constantly monitored, and when the feeder voltage of the feeder is smaller than a predetermined value, the regeneration is performed. The power is returned to the feeder line to compensate the feeder voltage. If the feeder voltage of the feeder line is higher than a predetermined value, the regenerative power is ionized into hydrogen ions and oxygen ions without being consumed (wasted) and stored. It is possible to reduce the regenerative lapse and to store and secondary use the regenerative electric power.

According to a fifth aspect of the present invention, in the regenerative electric power absorption and storage system for an electric railway according to the second aspect of the present invention, pure water generated by an electrochemical reaction in the fuel cell is converted to water electricity. A means for circulating the water to the decomposition apparatus and reusing it for electrolysis of pure water is added.

Therefore, in the regenerative electric power absorption / storage system for railways according to the invention, hydrogen ions and oxygen ions ionized and stored by the regenerative electric power are used as fuel for the fuel cell. The pure water obtained by the electrochemical reaction in the reactor is circulated to the water electrolyzer to be reused for the electrolysis of pure water, so that the regenerative electric power can be used more effectively and resources can be effectively used. It can be used.

According to a sixth aspect of the present invention, in the electric railway regenerative electric power absorption and storage system according to the first aspect of the present invention, the pair of electrodes is formed by electrolysis of pure water in a water electrolysis apparatus. Monitoring means for monitoring the deterioration state;
A means for outputting a message to the outside when the life of the electrode is determined based on the deterioration state of the electrode monitored by the monitoring means is added.

Therefore, in the regenerative electric power absorption and storage system for electric railway according to the present invention, the deterioration state of the electrode, which is indispensable for the electrolysis of pure water in the water electrolyzer, is monitored, and the deterioration of the electrode is monitored. By outputting a message to that effect, for example, a message indicating that the electrode needs to be replaced when it is determined that the battery has reached the end of its life, the regenerative power can be efficiently and continuously ionized and stored, and the regenerative power can always be stored. Revocation can be reduced and regenerative power can be stored.

[0026]

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

(First Embodiment) FIG. 1 is a schematic diagram showing a configuration example of a regenerative electric power absorption and storage system for electric railway according to the present embodiment, and the same elements as those in FIGS. 7 to 9 are denoted by the same reference numerals. It is shown attached.

In FIG. 1, a vehicle 20 travels by receiving electric power supplied from positive and negative feeders 18 and 19 at a DC substation for railways.

The regenerative power absorption / storage system includes a power conversion device including a stationary switching element 1 and a DC-DC converter 2, a water electrolysis device 3, and a storage tank 4.
a and 4b.

The power converter converts the regenerative power generated from the vehicle 20 into a specified voltage and outputs it.

The water electrolyzer 3 is provided at an output portion of the power converter, has a pair of electrodes 3a and 3b, and uses an output from the DC-DC converter 2 of the power converter. Electrolysis of pure water by a chemical reaction to ionize into hydrogen ions and oxygen ions.

The storage tanks 4a and 4b separately store oxygen ions and hydrogen ions ionized by the water electrolyzer 3.

Next, the operation of the regenerative electric power absorption and storage system for railways of the present embodiment configured as described above will be described.

In FIG. 1, regenerative power generated in a DC substation for railways by introduction of a vehicle 20 is converted to a specified voltage through a power conversion device including a stationary switching element 1 and a DC-DC converter 2, and an output portion thereof. Is supplied to the water electrolysis device 3 provided in the first stage.

In the water electrolyzer 3, pure water is electrolyzed by a chemical reaction using the output from the DC-DC converter 2 of the power converter, and is ionized into hydrogen ions and oxygen ions.

The oxygen ions and hydrogen ions ionized by the water electrolyzer 3 are separately stored in storage tanks 4a and 4b.

As a result, the regenerative electric power generated from the vehicle 20 is ionized and stored as hydrogen ions and oxygen ions, so that the regenerative electric power is consumed by the high-voltage distribution load using the inverter device described above. It is possible to reliably absorb and store continuously generated regenerative power, which was not possible in the past, such as a method in which regenerative power is consumed by a motor or flywheel and a method in which regenerative power is consumed by a resistance load. And effective use of regenerative power,
Regeneration lapse can be reduced.

As described above, in the regenerative electric power absorption / storage system for railways according to the present embodiment, continuously generated regenerative electric power can be ionized and reliably absorbed and stored without complicating the configuration. As a result, the regenerative electric power can be effectively used, and regenerative lapse can be reduced.

(Second Embodiment) FIG. 2 is a schematic diagram showing a configuration example of a regenerative electric power absorption and storage system for electric railway according to the present embodiment, and the same elements as those in FIG. A description thereof is omitted, and only different portions will be described here.

That is, as shown in FIG. 2, the regenerative electric power absorption / storage system of the present embodiment has a configuration in which fuel valves 5a and 5b and a fuel cell 6 are added to FIG.

The fuel valves 5a and 5b are connected to the storage tank 4a
And oxygen ions and hydrogen ions stored by 4b are introduced, and are opened and closed as needed, for example, in an emergency.

The fuel cell 6 introduces oxygen ions and hydrogen ions from the storage tanks 4a and 4b as fuel when the fuel valves 5a and 5b are opened, generates power by an electrochemical reaction between the two, and uses DC power for emergency. Output to the power generation load 15.

This fuel cell 6 normally uses, for example, phosphoric acid as an electrolyte and electrochemically reacts hydrogen and oxygen to directly generate power, and can obtain high power generation efficiency. In the fuel cell 6, pure water is generated by this electrochemical reaction.

Next, the operation of the regenerative electric power absorption and storage system for railways of the present embodiment configured as described above will be described.

The description of the operation of the same elements as in the first embodiment is omitted, and only the operation of the different parts will be described here.

In FIG. 2, for example, the fuel valve 5
When a and 5b are opened, oxygen ions and hydrogen ions ionized and stored in the storage tanks 4a and 4b are introduced into the fuel cell 6 as fuel.

In the fuel cell 6, when the fuel valves 5a and 5b are opened, oxygen ions and hydrogen ions from the storage tanks 4a and 4b are introduced as fuel, and electric power is generated by an electrochemical reaction between the two to obtain DC power. This DC power is supplied to the emergency power generation load 15 and consumed.

As a result, the hydrogen ions and oxygen ions, which have been ionized and stored by the regenerative power generated from the vehicle 20, are used as fuel for the fuel cell 6, so that the regenerative power is secondarily used as an emergency power generation facility. This makes it possible to more effectively use the regenerative electric power.

As described above, in the regenerative electric power absorption / storage system for electric railway according to the present embodiment, the regenerative electric power can be more effectively used as compared with the above-described first embodiment.

(Third Embodiment) FIG. 3 is a schematic diagram showing an example of the configuration of a regenerative electric power absorption and storage system for railways according to the present embodiment, and the same elements as those in FIG. A description thereof is omitted, and only different portions will be described here.

That is, as shown in FIG. 3, the regenerative electric power absorption and storage system of the present embodiment has an inverter device 11 and an inverter transformer 12 added to FIG.

The inverter device 11 is composed of a plurality of switching elements, and operates when the load of the high-voltage distribution load 14 reaches a predetermined value or more, and converts DC power output from the fuel cell 6 into AC power. Output.

The inverter transformer 12 transforms the AC power output from the inverter device 11 to a predetermined value and supplies it to the high-voltage distribution load 14.

Next, the operation of the regenerative electric power absorption and storage system for railways of the present embodiment configured as described above will be described.

The operation of the same elements as those in the above-described second embodiment will not be described, and only the operation of different parts will be described.

In FIG. 3, when the load amount of the high-voltage distribution load 14 is larger than a predetermined value, the inverter device 11 operates to convert DC power output from the fuel cell 6 into AC power, and further convert the DC power to AC power. The regenerative electric power generated by the vehicle 20 is consumed by the high voltage distribution load 14 equipment after being transformed to a predetermined value by the power transformer 12 and supplied to the high voltage distribution load 14.

When the load of the high-voltage distribution load 14 is smaller than a predetermined value, the inverter device 11 does not operate, and the regenerative electric power generated from the vehicle 20 is converted into hydrogen ions and oxygen ions by the operation described above. And stored in the storage tanks 4a and 4b.

Thus, when the load of the high-voltage distribution load 14 is larger than the predetermined value, the regenerative power is consumed by the high-voltage distribution load 14 equipment, and when the load of the high-voltage distribution load 14 is smaller than the predetermined value. It is possible to ionize and store the regenerative electric power into hydrogen ions and oxygen ions without consuming (wasting) the regenerative electric power, thereby reducing regenerative lapse and storing and reusing the regenerative electric power.

As described above, in the regenerative electric power absorption and storage system for electric railway according to the present embodiment, compared with the above-described second embodiment, it is possible to store the regenerative electric power and further utilize the secondary power. it can.

(Fourth Embodiment) FIG. 4 is a schematic diagram showing a configuration example of a regenerative electric power absorption and storage system for electric railway according to the present embodiment, and the same elements as those in FIG. A description thereof is omitted, and only different portions will be described here.

That is, as shown in FIG. 4, the regenerative electric power absorption and storage system for electric railway according to the present embodiment includes a second power conversion device comprising a DC-DC converter 21 and a static switching element 22 as shown in FIG. Is added.

The second power converter includes the feeder wires 18,
The feeder voltage is constantly monitored, and when the feeder voltage reaches a predetermined value or less, the static switching element 22 operates,
The DC power output from the fuel cell 6 is converted to a specified voltage by the DC-DC converter 21 and returned to the electric wires 18 and 19.

Next, the operation of the regenerative electric power absorption and storage system for railways of the present embodiment configured as described above will be described.

The description of the operation of the same elements as those of the second embodiment is omitted, and only the operation of the different parts will be described here.

In FIG. 4, the feeder voltages of feeder wires 18 and 19 are constantly monitored, and when the feeder voltage is lower than a predetermined value, the second power converter operates and the output from fuel cell 6 is output. DC power is converted to a specified voltage,
Returning to steps 8 and 19, the electric voltage is compensated.

When the feeding voltage is higher than the predetermined value, the second power converter does not operate, and the regenerative power generated from vehicle 20 is converted into hydrogen ions and oxygen ions by the above-described operation. Ionized, storage tanks 4a and 4
b.

Thus, when the feeding voltage of the feeding wires 18 and 19 is smaller than a predetermined value, the regenerative power is
When the feeding voltage of the feeder wires 18 and 19 is higher than a predetermined value, hydrogen ions and oxygen ions are consumed without regenerating power consumption (wasting). Thus, it is possible to ionize and store the regenerated electricity, thereby reducing regeneration lapse and storing and secondary use of regenerated electric power.

As described above, in the regenerative electric power absorption / storage system for electric railway according to the present embodiment, compared with the above-described second embodiment, the regenerative electric power can be stored and the secondary usage can be further improved. it can.

(Fifth Embodiment) FIG. 5 is a schematic diagram showing an example of the configuration of a regenerative electric power absorption and storage system for electric railways according to the present embodiment, in which the same elements as those in FIG. A description thereof is omitted, and only different portions will be described here.

That is, as shown in FIG. 5, the regenerative electric power absorption and storage system for electric railway
Is added to the configuration of FIG.

When the drain valve 23 is opened, the pure water 17 generated by the electrochemical reaction in the fuel cell 6 is circulated to the water electrolyzer 3 to be reused for pure water electrolysis. .

Next, the operation of the regenerative electric power absorption and storage system for railways of the present embodiment configured as described above will be described.

The description of the operation of the same elements as those of the second embodiment is omitted, and only the operation of the different parts will be described here.

In FIG. 5, as described above, in the fuel cell 6, when the fuel valves 5a and 5b are opened, the storage tank 4
Oxygen ions and hydrogen ions from a and 4b are introduced as fuel, and power is generated by an electrochemical reaction of the two to obtain DC power. At this time, pure water is obtained by the electrochemical reaction.

The pure water 17 generated by the electrochemical reaction is circulated to the water electrolyzer 3 when the drain valve 23 is opened, and is reused for the pure water electrolysis.

As a result, the hydrogen ions and oxygen ions that have been ionized and stored by the regenerative electric power generated from the vehicle 20 are used as fuel for the fuel cell 6, and are further subjected to an electrochemical reaction using the hydrogen ions and oxygen ions. The generated pure water 17 is reused for the electrolysis in the water electrolyzer 3, so that the regenerative electric power can be more effectively used and resources can be effectively used.

As described above, in the regenerative electric power absorption and storage system for electric railway according to the present embodiment, the same effects as those of the above-described second embodiment are obtained, and in addition to the resources (pure water 1).
7) can be effectively used.

(Sixth Embodiment) FIG. 6 is a schematic diagram showing a configuration example of a regenerative electric power absorption and storage system for electric railway according to the present embodiment, in which the same elements as those in FIG. A description thereof is omitted, and only different portions will be described here.

That is, as shown in FIG. 6, the regenerative electric power absorption and storage system of the present embodiment has a configuration in which a sensor 7 as monitoring means and a control personal computer 8 are added to FIG.

The sensor 7 comprises, for example, a light emitting section 7a and a light receiving section 7b using an optical sensor.
The light receiving section 7b is disposed on the anode 3a and cathode 3b side of the water electrolysis apparatus 3 as shown in the figure.

The sensor 7 receives the light emitted from the light emitting section 7a at the light receiving section 7b via the anode 3a and the cathode 3b, thereby forming the anode by the electrolysis of pure water in the water electrolysis apparatus 3. The deterioration state of the cathode 3a and the cathode 3b is monitored.

The control personal computer 8 operates based on the deterioration state of the anode 3a and the cathode 3b monitored by the sensor 7,
That is, a signal corresponding to the amount of light emitted from the light emitting unit 7a and a signal corresponding to the amount of light received by the light receiving unit 7b are input, and the ratio of the signal corresponding to the amount of light received to the signal corresponding to the amount of light emitted is set in advance. The life of the anode 3a and the cathode 3b is determined based on whether or not the anode 3a
If it is determined that the life of the cathode 3b is reached, a message to that effect (for example, a message that the electrode needs to be replaced) is output to the outside by an alarm or the like.

Next, the operation of the regenerative electric power absorption and storage system for railways of the present embodiment configured as described above will be described.

The operation of the same elements as those in the first embodiment will not be described, and only the operation of the different parts will be described.

In FIG. 6, as described above, in the water electrolyzer 3, pure water is electrolyzed by a chemical reaction using the output from the DC-DC converter 2 of the power converter, and hydrogen ion And oxygen ions.

As the electrolysis of pure water in the water electrolyzer 3 proceeds, the anode 3a and the cathode 3b gradually deteriorate.

In this case, the deterioration state of the anode 3a and the cathode 3b is monitored by the control personal computer 8 through the sensor 7.

That is, light is emitted from the light-emitting portion 7a of the sensor 7, and the emitted light is received by the light-receiving portion 7b through the anode 3a and the cathode 3b. The deterioration state of the anode 3a and the cathode 3b due to the decomposition is monitored.

Specifically, the control personal computer 8 inputs a signal corresponding to the amount of light emitted from the light emitting section 7a and a signal corresponding to the amount of light received by the light receiving section 7b, and receives the signal corresponding to the signal corresponding to the amount of light emitted. The life of the anode 3a and the cathode 3b is determined based on whether or not the ratio of the signal corresponding to the above has reached a predetermined value or more.

In this case, when the degree of deterioration of the anode 3a and the cathode 3b is relatively small, most of the light emitted from the light emitting section 7a is blocked by the anode 3a and the cathode 3b, and thus is received by the light receiving section 7b. The amount of light is small.

On the other hand, in a state where the deterioration of the anode 3a and the cathode 3b has progressed and the degree of the deterioration has increased, the thickness of the anode 3a and the cathode 3b has become thinner or the anode 3a and the cathode 3b The length of the cathode 3b becomes shorter. Therefore, most of the light emitted from the light emitting unit 7a is not blocked by the anode 3a and the cathode 3b, so that the amount of light received by the light receiving unit 7b increases.

Therefore, in the control personal computer 8, since the ratio of the amount of light received by the light receiving section 7b to the amount of light emitted from the light emitting section 7a has become equal to or greater than a preset value,
It is determined that the anode 3a and the cathode 3b have reached the end of their life.

When it is determined that the life of the anode 3a and the cathode 3b is reached, a message to that effect, for example, a message that the electrode needs to be replaced, is output to the outside by an alarm or the like.

Thus, the deterioration state of the electrode, which is indispensable for the electrolysis of pure water in the water electrolyzer 3, is monitored, and when it is determined that the electrode has reached the end of its life, it is necessary to replace the electrode. Since the message is output, the exchange efficiency of the pure water electrolysis reaction in the water electrolyzer 3 can be constantly maintained by exchanging the electrodes, and as a result, the regenerative electric power is reduced. It can be efficiently and continuously ionized and stored.

As described above, in the regenerative electric power absorption / storage system for electric railway according to the present embodiment, in addition to the same effects as those of the above-described first embodiment, the regenerative electric power can be efficiently and continuously supplied. Thus, it is possible to always reduce the regenerative lapse and to store the regenerative electric power.

[0096]

As described above, according to the regenerative electric power absorption and storage system of the present invention, the energy generated by the regenerative electric power is ionized and stored, so that the configuration is not complicated. In addition, it is possible to reliably absorb and store the continuously generated regenerative electric power so as to effectively utilize the regenerative electric power, and to provide an environment-friendly system capable of eliminating regenerative lapse.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a first embodiment of a regenerative electric power absorption and storage system for railways according to the present invention.

FIG. 2 is a schematic diagram showing a second embodiment of a regenerative electric power absorption and storage system for railways according to the present invention.

FIG. 3 is a schematic diagram showing a third embodiment of a regenerative electric power absorption and storage system for railways according to the present invention.

FIG. 4 is a schematic diagram showing a fourth embodiment of a regenerative electric power absorption and storage system for electric railways according to the present invention.

FIG. 5 is a schematic diagram showing a fifth embodiment of a regenerative electric power absorption and storage system for electric railway according to the present invention.

FIG. 6 is a schematic diagram showing a sixth embodiment of a regenerative electric power absorption and storage system for railways according to the present invention.

FIG. 7 is a schematic diagram showing a configuration example of a conventional regenerative power absorption device in a DC substation for railways.

FIG. 8 is a schematic diagram showing another configuration example of a regenerative power absorption device in a conventional DC substation for railways.

FIG. 9 is a schematic diagram showing another configuration example of a regenerative power absorption device in a conventional DC substation for railways.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Static switching element 2 ... DC-DC converter 3 ... Water electrolysis apparatus 4a, 4b ... Storage tank 5a, 5b ... Fuel valve 6 ... Fuel cell 7 ... Sensor 7a ... Light emitting part 7b ... Light receiving part 8 ... Control personal computer 9 ... Flywheel 10 ... AC generator motor 11 ... Inverter device 12 ... Inverter transformer 13 ... Resistive load 14 ... High voltage distribution load 15 ... Emergency power generation load 17 ... Pure water 18 ... Positive side electric wire 19 ... Negative side electric wire DESCRIPTION OF SYMBOLS 20 ... Vehicle 21 ... DC-DC converter 22 ... Static switching element 23 ... Drain valve.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shiro Otake 1-1-1 Shibaura, Minato-ku, Tokyo F-term in the Toshiba head office (reference) 5H027 AA02 BA11 BA13 BC01 DD00

Claims (6)

[Claims] 1. A system for receiving and supplying power supplied from a feeder line in a DC substation for railways and absorbing and storing regenerative power generated from a traveling vehicle, wherein the regenerative power generated from the vehicle is converted into a specified voltage. And a pair of electrodes, an anode and a cathode, which perform electrolysis of pure water by a chemical reaction using the output from the power converter, and ionize into hydrogen ions and oxygen ions. A regenerative electric power absorption and storage system for railways, comprising: a water electrolysis device; and a storage device for separately storing hydrogen ions and oxygen ions ionized by the water electrolysis device. 2. The regenerative electric power absorption and storage system according to claim 1, wherein the hydrogen ions and oxygen ions stored in the storage device are introduced as fuel, and power is generated by an electrochemical reaction between the two. A regenerative electric power absorption and storage system for railways, wherein a fuel cell for outputting electric power is added, and DC power output from the fuel cell is supplied to an emergency power generation load as needed. 3. The regenerative electric power absorption and storage system according to claim 2, wherein when the load of the high-voltage distribution load reaches a predetermined value or more, the DC power output from the fuel cell is converted to AC power. A regenerative electric power absorption and storage system for electric railways, wherein an inverter device for converting the electric power to electric power and supplying the electric power to the high voltage distribution load is added. 4. The regenerative electric power absorption and storage system for an electric railway according to claim 2, wherein the feeder voltage of the feeder line is constantly monitored, and when the feeder voltage reaches a predetermined value or less, the fuel cell is operated to operate. A regenerative electric power absorption and storage system for railways, wherein a second power converter for converting DC power output from a battery to a specified voltage and returning the same to the feeder line is added. 5. The regenerative electric power absorption and storage system for an electric railway according to claim 2, wherein pure water generated by an electrochemical reaction in the fuel cell is circulated to the water electrolyzer to produce the pure water. A regenerative electric power absorption and storage system for electric railways, wherein a means for reusing the electric power for electrolysis is added. 6. The regenerative electric power absorption and storage system for electric railway according to claim 1, wherein a monitoring unit monitors a deterioration state of the pair of electrodes due to electrolysis of pure water in the water electrolyzer. A means for outputting a message to that effect to the outside when it is determined that the life of the electrode is determined based on the deterioration state of the electrode monitored by the monitoring means; and Absorption storage system.