Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
  • B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
  • B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
  • B60M3/02—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power with means for maintaining voltage within a predetermined range

Definitions

• This disclosure relates to a station building auxiliary power supply device.
• railway vehicles are able to run by receiving power from overhead lines.
• equipment that supplies power to the overhead lines such as electric railway feeder line equipment, breaks down, power will not be supplied to the overhead lines, resulting in a power shortage and causing the railroad vehicles to become stranded and unable to run. For this reason, there is a need to supply power to the overhead lines even when there is a power shortage, so that railroad vehicles can move to the nearest station, etc.
• Patent Document 1 discloses a technology that, under normal circumstances, regenerative power generated when a railway vehicle decelerates is used to charge a storage battery electrically connected to the overhead line, and when power to the overhead line is lost, the power stored in the storage battery is supplied to the overhead line, allowing the railway vehicle to continue running even when power to the overhead line is lost.
• the present disclosure has been made in light of the above, and aims to provide a station building auxiliary power supply device that can stably supply power to the overhead lines when the overhead lines are in a power shortage state.
• the station building auxiliary power supply device disclosed herein is electrically connected to an overhead line that supplies power to railway vehicles and a commercial power distribution line to which a load is connected, and includes a power conversion unit that can convert between first power, which is the power of the overhead line, and second power, which is power that can be supplied to the load; an output mode setting unit that sets the output mode of the power conversion unit based on notification of overhead line abnormality information that indicates a power shortage state of the overhead line; and a power conversion control unit that controls the power conversion unit in accordance with the output mode set by the output mode setting unit; and when notification of overhead line abnormality information is received, the output mode setting unit sets the emergency mode, which is an output mode in which the power conversion unit converts the second power to first power and supplies the converted first power to the overhead line.
• the station building auxiliary power supply device disclosed herein has the effect of being able to stably supply power to the overhead lines when the overhead lines are in a power shortage state.
• FIG. 1 is a diagram showing an application example of a station building auxiliary power supply device according to a first embodiment
• FIG. 2 is a diagram showing an example of a power shortage state of an overhead line according to the first embodiment
• 1 is a diagram showing an example of the configuration of a station building auxiliary power supply device according to a first embodiment
• 5 is a flowchart showing the operation of a control unit of a station building auxiliary power supply device according to the first embodiment.
• FIG. 10 is a diagram showing an example of the configuration of a station building auxiliary power supply device according to a second embodiment.
• FIG. 10 is a diagram showing an example of the configuration of a station building auxiliary power supply device according to a third embodiment.
• FIG. 10 is a flowchart showing the operation of a control unit of a station building auxiliary power supply device according to the third embodiment.
• 1 is a diagram showing an example of a case where a processing circuit provided in a control unit of a station building auxiliary power supply device according to the first embodiment is realized by a processor and a memory.
• FIG. 1 is a diagram showing an example in which the processing circuit provided in the control unit of the station building auxiliary power supply device according to the first embodiment is configured with dedicated hardware.
• FIG. 1 is a diagram showing an application example of a station building auxiliary power supply device 1 according to a first embodiment.
• the arrows in FIG. 1 indicate the direction of power supply during normal operation.
• the station building auxiliary power supply device 1 according to the first embodiment includes a power conversion unit 11 and a control unit 12.
• the power conversion unit 11 converts high-voltage DC power (e.g., DC 1500 V) supplied from an overhead line 2 into low-voltage AC power (e.g., AC 210 V), and outputs the converted AC power to a distribution line 103 of a commercial system.
• the distribution line 103 of the commercial system is referred to as the commercial system 103.
• the control unit 12 controls the power conversion unit 11.
• Substation 100 transforms the power transmitted from the power plant and supplies the transformed power to each distribution line.
• Substation 100 is equipped with feeder line equipment 101, which converts the input power into power to be supplied to overhead lines 2 and outputs it.
• Feeder line equipment 101 is equipped with a notification unit 17 that notifies of abnormalities such as failures in feeder line equipment 101. In the event of an abnormality such as a failure, feeder line equipment 101 stops the supply of power to overhead lines 2.
• High-voltage DC power is supplied to the overhead line 2 from the feeder line equipment 101 of the substation 100.
• regenerative power obtained by the regenerative operation of the vehicle 4 is supplied to the overhead line 2 from the vehicle 4 via the current collector 3.
• the current collector 3 is, for example, a pantograph or a current collector shoe.
• the station building auxiliary power supply 1 is electrically connected to the overhead line 2 and is supplied with high-voltage DC power from the overhead line 2.
• the power on the overhead line 2 side of the station building auxiliary power supply 1 is referred to as the first power.
• the substation 100 supplies high-voltage AC power (e.g., AC 6600V system) to the high-voltage AC distribution line 102.
• the high-voltage AC distribution line 102 is a separate distribution line from the overhead line 2.
• the station building 5 includes a station building auxiliary power supply unit 1, loads 6-1, 6-2, ..., 6-n (hereinafter referred to as "loads 6"), and a transformer 7 installed in a station electrical room or the like (not shown).
• the station building auxiliary power supply unit 1 is electrically connected between the overhead line 2 and the load 6, and the station building auxiliary power supply unit 1 and the load 6 are connected by a commercial system 103.
• a connection point A on the commercial system 103 that connects the station building auxiliary power supply unit 1 and the load 6.
• Connection point A and the high-voltage AC distribution line 102 are connected via a transformer 7.
• the secondary side of the station building auxiliary power supply unit 1 is electrically connected to connection point A on the commercial system 103 that connects the load 6 and the transformer 7.
• the station building auxiliary power supply unit 1 converts the first power supplied from the overhead line 2 into second power that can be supplied to the load 6, and supplies the converted second power to the load 6 in the station building 5. Note that normal operation does not need to be performed all the time, and control of the station building auxiliary power supply unit 1 may be put into standby or stopped. For example, when the regenerative power of vehicle 4 is not consumed by the powering of other vehicles, etc., and becomes surplus regenerative power, the power conversion unit 11 of the station building auxiliary power supply unit 1 operates to supply the surplus regenerative power to the station building 5.
• the load 6 can effectively utilize not only the second power supplied from the high-voltage AC distribution line 102 via the transformer 7, but also the surplus regenerative power of vehicle 4 that has been converted into second power by the station building auxiliary power supply unit 1.
• the first power conversion unit 13 has multiple switching elements (not shown), which are each controlled by the control unit 12 to perform bidirectional DC/AC power conversion between the overhead line 2 and the transformer 14.
• the first power conversion unit 13 is, for example, an inverter capable of bidirectional DC/AC power conversion. Under normal circumstances, the first power conversion unit 13 converts DC power input from the overhead line 2 into AC power and outputs the converted AC power to the transformer 14. Under emergency circumstances, the first power conversion unit 13 converts AC power input from the transformer 14 into DC power and outputs the converted DC power to the overhead line 2.
• the transformer 14 is connected at one end to the first power conversion unit 13 and at the other end to connection point A of the commercial grid 103, and transforms and outputs the voltage of the power input to the transformer 14. Specifically, under normal circumstances, the transformer 14 steps down the voltage of the AC power output from the first power conversion unit 13 to a voltage that can be supplied to the load 6, and outputs the stepped-down low-voltage AC power to the commercial grid 103. Under emergency circumstances, the transformer 14 steps up the voltage of the low-voltage AC power, which is the second power input from the commercial grid 103, and outputs the stepped-up AC power to the first power conversion unit 13.
• the control unit 12 includes an output mode setting unit 15 and a power conversion control unit 16.
• the control unit 12 sets the output mode to switch the output direction of the power conversion unit 11, and controls the on/off of multiple switching elements included in the first power conversion unit 13 according to the set output mode.
• the output mode setting unit 15 receives overhead line abnormality information indicating a power shortage state of the overhead line 2 from the notification unit 17.
• the output mode setting unit 15 sets the output mode based on the overhead line abnormality information indicating a power shortage state of the overhead line 2.
• the output mode indicates the direction in which the power conversion unit 11 of the auxiliary power supply 1 outputs power, and includes normal mode and emergency mode.
• Normal mode is the mode in normal times when the overhead line 2 is not in a power shortage state, and is a mode in which the power conversion unit 11 converts the power input from the overhead line 2 and outputs it to the commercial grid 103 side.
• Emergency mode is the mode in emergency times when the overhead line 2 is in a power shortage state, and is a mode in which the power conversion unit 11 converts the power input from the commercial grid 103 side and outputs it to the overhead line 2 side.
• the output mode setting unit 15 sets the output mode to emergency mode when the overhead line 2 is in a power shortage state, and to normal mode when the overhead line 2 is not in a power shortage state.
• the power conversion control unit 16 controls the power conversion unit 11 according to the setting of the output mode setting unit 15.
• the power conversion control unit 16 controls the power conversion unit 11, such as switching elements, to convert the second power of the commercial grid 103 into first power to be supplied to the overhead line 2.
• the power conversion control unit 16 controls the power conversion unit 11, such as switching elements, to convert the first power of the overhead line 2 into second power that can be supplied to the load 6.
• the notification unit 17 sends overhead line abnormality information to the control unit 12.
• the notification unit 17 is provided in the feeder line equipment 101, but it may also be provided in the vehicle 4 or the wayside equipment.
• the overhead line abnormality information is information indicating a state in which the vehicle 4 cannot run due to a drop in voltage on the overhead line 2, such as power outage information on the overhead line 2, stoppage information on the feeder line equipment 101, or voltage drop information on the overhead line 2, i.e., a power shortage state on the overhead line 2.
• the overhead line abnormality information notified to the control unit 12 from the notification unit 17 may be notified by a person such as a driver or worker manually pressing a switch or button on a screen, or may be notified by mechanical judgment on the feeder line equipment 101, the vehicle 4, or the wayside equipment.
• Figure 4 is a flowchart showing the operation of the control unit 12 of the station building auxiliary power supply unit 1 according to embodiment 1.
• the control unit 12 controls the power conversion unit 11 to convert the second power input from the commercial grid 103 into first power that can be supplied to the overhead line 2 and output the converted first power to the overhead line 2 (step S2).
• the output mode setting unit 15 of the control unit 12 determines whether the overhead line 2 is in a power shortage state (step S1). In embodiment 1, the control unit 12 determines whether the overhead line 2 is in a power shortage state based on the overhead line abnormality information sent from the notification unit 17.
• the output mode setting unit 15 sets the output mode to an emergency mode in which the power conversion unit 11 converts the second power input from the commercial grid 103 into first power that can be supplied to the overhead line 2 and outputs the first power to the overhead line 2 (step S2).
• the power conversion control unit 16 then controls the power conversion unit 11 in accordance with the emergency mode, which is the output mode set by the output mode setting unit 15 (step S3).
• the control unit 12 of the station building auxiliary power supply device 1 controls the power conversion unit 11 to convert the second power input from the commercial grid 103 into first power that can be supplied to the overhead line 2, and the power conversion unit 11 outputs the first power converted from the second power to the overhead line 2.
• control unit 12 of the station building auxiliary power supply device 1 controls the power conversion unit 11 to convert the first power input from the overhead line 2 into second power that can be supplied to the load 6, and the power conversion unit 11 outputs the second power converted from the first power to the load 6 on the commercial grid 103 side.
• the station building auxiliary power supply 1 sets the emergency mode, converts the second power, which is the power of the commercial system 103, into the first power, which is the power of the overhead line 2, and outputs the converted first power to the overhead line 2.
• the station building auxiliary power supply 1 of embodiment 1 when the overhead line 2 is in a power shortage state, it is possible to supply DC power from the commercial system 103 to the overhead line 2 via the station building auxiliary power supply 1, and it is possible to stably supply power to the overhead line 2 regardless of whether the storage battery is charged. As a result, the power shortage state of the overhead line 2 is resolved, and the vehicle 4 can run.
• the station building auxiliary power supply unit 1 of this embodiment normally supplies the regenerative power of the cars 4 to the load 6 in the station building 5 as power for the load 6, thereby utilizing surplus regenerative power for the load 6, and in an emergency, it is possible to stably supply power to the overhead line 2 using power from the commercial grid 103 as power for the overhead line 2, thereby improving the operating efficiency of the station building auxiliary power supply unit 1. Furthermore, because the station building auxiliary power supply unit 1 of this embodiment can realize the function of utilizing surplus regenerative power from the cars 4 and the function of providing an emergency power supply for the overhead line 2 in a single device, there is no need to install separate equipment, which also leads to a reduction in equipment space and equipment costs.
• Embodiment 2 In the second embodiment, a case will be described in which the power supplied to the overhead line 2 is AC power. Description of content that overlaps with the first embodiment will be omitted as appropriate, and only differences will be described.
• the overhead line 2 is supplied with high-voltage AC power (e.g., AC 20,000 V system) from a feeder line facility 101 in a substation 100.
• the station building auxiliary power supply unit 1a is electrically connected to the overhead line 2. Under normal circumstances, AC power, which is the first power, is input from the overhead line 2 to the station building auxiliary power supply unit 1a.
• a transformer is provided between the overhead line 2 and the station building auxiliary power supply unit 1a.
• This transformer steps down the high-voltage AC power, and the stepped-down AC power is input to the station building auxiliary power supply unit 1a.
• This transformer may be provided within the station building auxiliary power supply unit 1a or may be provided separately from the station building auxiliary power supply unit 1a.
• the second power conversion unit 18 is connected between the overhead line 2 and the first power conversion unit 13 and has multiple switching elements (not shown).
• the multiple switching elements are each controlled by the control unit 12a, thereby performing bidirectional AC/DC power conversion between the overhead line 2 and the first power conversion unit 13.
• the second power conversion unit 18 is a converter capable of bidirectional AC/DC power conversion.
• the control unit 12a includes an output mode setting unit 15 and a power conversion control unit 16a.
• the control unit 12a sets the output mode of the power conversion unit 11a based on whether or not the notification unit 17 has notified the user of overhead line abnormality information, and controls the power conversion unit 11a according to the set output mode.
• the power conversion control unit 16a controls the multiple switching elements provided in the first power conversion unit 13 and the second power conversion unit 18 according to the settings of the output mode setting unit 15.
• the power conversion control unit 16a converts AC power input from the commercial grid 103 via the transformer 14 into DC power, and controls the first power conversion unit 13 to output the converted DC power to the second power conversion unit 18. The power conversion control unit 16a then converts DC power output from the first power conversion unit 13 into AC power, and controls the second power conversion unit 18 to output the converted AC power to the overhead line 2.
• control unit 12a of the station building auxiliary power supply unit 1a in embodiment 2 is the same as that in embodiment 1 shown in Figure 5.
• this embodiment shows an example configuration of the station building auxiliary power supply unit 1a when the power supplied to the overhead line 2 is AC power.
• the station building auxiliary power supply unit 1a enters emergency mode, converts the second power, which is power from the commercial grid 103, into the first power, which is power for the overhead line 2, and outputs the converted first power to the overhead line 2.
• the station building auxiliary power supply unit 1a of embodiment 2 if the overhead line 2 experiences a power shortage state due to a failure of the feeder line equipment that supplies AC power to the overhead line 2, AC power can be supplied to the overhead line 2 from the commercial grid 103 via the station building auxiliary power supply unit 1a, allowing a stable power supply to the overhead line 2 regardless of whether the storage battery is charged. As a result, the power shortage state of the overhead line 2 is resolved, allowing the vehicle 4 to run.
• Embodiment 3 In the third embodiment, a case will be described in which the station building auxiliary power supply unit 1b determines whether there is an abnormality in the overhead line 2. Explanations of content that overlaps with the first and second embodiments will be omitted as appropriate, and only differences will be described. Note that the power of the overhead line 2 is assumed to be DC power or AC power.
• FIG. 6 is a diagram showing an example configuration of the control unit 12b of the station building auxiliary power supply unit 1b according to embodiment 3.
• the control unit 12b includes an output mode setting unit 15, a power conversion control unit 16, and an overhead line abnormality determination unit 19.
• the overhead line abnormality determination unit 19 acquires the overhead line voltage measured by the voltage sensor 20 that measures the voltage of the overhead line 2, and determines whether the overhead line 2 is in a state of power shortage based on the overhead line voltage.
• a memory unit (not shown) stores a voltage threshold value for determining whether the overhead line 2 is in a state of power shortage.
• the overhead line abnormality determination unit 19 sends the determination result to the output mode setting unit 15.
• the voltage sensor 20 is installed on the overhead line 2 or on the overhead line 2 side of the station auxiliary power supply unit 1b, and measures the overhead line voltage, which is the voltage between the overhead line 2 and the rails (not shown).
• Figure 7 is a flowchart showing the operation of the control unit 12b of the station building auxiliary power supply unit 1b according to embodiment 3. The operation of the station building auxiliary power supply unit 1b according to embodiment 3 will be explained using the flowchart.
• the overhead line abnormality determination unit 19 of the station building auxiliary power supply unit 1b acquires the overhead line voltage from the voltage sensor 20 (step S5). Based on the overhead line voltage acquired from the voltage sensor 20, the overhead line abnormality determination unit 19 determines whether the overhead line voltage is below a threshold value (step S6). If the overhead line voltage is below the threshold value (step S6: Yes), the output mode setting unit 15 determines that the overhead line 2 is in a power shortage state and sets the output mode to emergency mode (step S2). If the overhead line voltage is not below the threshold value (step S6: No), the output mode setting unit 15 determines that the overhead line 2 is not in a power shortage state and sets the output mode to normal mode (step S4).
• the operation of step S3 is the same as in embodiments 1 and 2, so a description thereof will be omitted.
• the station building auxiliary power supply unit 1b is configured to determine whether the overhead line 2 is in a power shortage state using the overhead line abnormality determination unit 19. According to the station building auxiliary power supply unit 1b of embodiment 3, even if the communication means of the notification unit 17 is cut off, for example, the station building auxiliary power supply unit 1b can itself determine whether the overhead line 2 is in a power shortage state. This allows the station building auxiliary power supply unit 1b to switch to emergency mode without waiting for communication from the notification unit 17 to be restored, so the power shortage state of the overhead line 2 can be quickly resolved and the vehicle 4 can perform emergency running.
• the frequency of the AC power of the overhead line 2 measured by the voltage sensor 20 may be acquired, and based on the acquired frequency of the AC power of the overhead line 2, it may be determined whether the frequency of the AC power of the overhead line 2 is within a predetermined range, thereby determining whether the overhead line 2 is in a power shortage state.
• the station building auxiliary power supply unit 1b of embodiment 3 can quickly switch to emergency mode.
• the overhead line abnormality information may include frequency abnormality information indicating that the frequency of the AC power on overhead line 2 is abnormal.
• FIG 8 is a diagram showing an example configuration of a processing circuit 90 when the processing circuits provided in the control units 12, 12a, and 12b of the station building auxiliary power supplies 1, 1a, and 1b according to embodiments 1, 2, and 3 are realized by a processor 91 and a memory 92.
• the processing circuit 90 shown in Figure 8 is a control circuit and includes a processor 91 and a memory 92.
• each function of the processing circuit 90 is realized by software, firmware, or a combination of software and firmware.
• the software or firmware is written as a program and stored in the memory 92.
• the processor 91 reads and executes the program stored in the memory 92 to realize each function of the processing circuit 90.
• the processing circuit 90 includes a memory 92 for storing a program that will result in the processing of the station building auxiliary power supply 1 being executed.
• This program can also be said to be a program for causing the control units 12, 12a, and 12b of the station building auxiliary power supply units 1, 1a, and 1b to execute the functions realized by the processing circuit 90.
• This program may be provided by a storage medium on which the program is stored, or by other means such as a communication medium.
• the processor 91 may be, for example, a CPU (Central Processing Unit), processing unit, arithmetic unit, microprocessor, microcomputer, or DSP (Digital Signal Processor).
• the memory 92 may be, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), or EEPROM (Electrically EPROM), a magnetic disk, a flexible disk, an optical disk, a compact disk, a minidisk, or a DVD (Digital Versatile Disc).
• FIG. 9 is a diagram showing an example of the processing circuit 93 provided in the control units 12, 12a, 12b of the station auxiliary power supply devices 1, 1a, 1b according to embodiments 1, 2, and 3 configured with dedicated hardware.
• the processing circuit 93 shown in Figure 9 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination of these.
• the processing circuit 93 may be partially implemented with dedicated hardware and partially implemented with software or firmware. In this way, the processing circuit 93 can achieve the above-mentioned functions with dedicated hardware, software, firmware, or a combination of these.
• station building auxiliary power supplies 1, 1a, and 1b are provided in the station building 5, but the installation location is not limited to this.
• the station building auxiliary power supplies 1, 1a, and 1b only need to be electrically connected to the overhead line 2.
• the station building auxiliary power supplies 1, 1a, and 1b may also be installed, for example, outside the station building 5, along the tracks of the overhead line 2, or in facilities around the station.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Stand-By Power Supply Arrangements (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=96773699

Family Applications (1)

Country Status (2)

Citations (3)

• 2024
  • 2024-02-14 WO PCT/JP2024/004950 patent/WO2025173099A1/ja active Pending
  • 2024-02-14 JP JP2026500365A patent/JPWO2025173099A1/ja active Pending

Patent Citations (3)

Also Published As

Similar Documents

Legal Events