WO2020194697A1

WO2020194697A1 - Station building auxiliary power supply device

Info

Publication number: WO2020194697A1
Application number: PCT/JP2019/013750
Authority: WO
Inventors: 俊明竹岡; 田中　毅; 修司石倉; 松本　真一
Original assignee: 三菱電機株式会社
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-10-01
Also published as: DE112019007098T5; JPWO2020194697A1; JP6991391B2

Abstract

This station building auxiliary power supply device (2) comprises: a first power supply converter (4) which converts a first electric power supplied from aerial wiring (6) into a second electric power which can be used by loads (7) installed within a station building (1); and an operation start determination unit (32) which determines, on the basis of load status information indicating the operating state of the load (7), whether to have the first power supply converter (4) perform a conversion operation.

Description

Station building auxiliary power supply

The present invention relates to a station building auxiliary power supply device that supplies electric power to various loads in the station building.

In recent years, the regenerative power generated by the regenerative braking of trains is used as power running power for other trains via overhead lines. However, if there are few or no other trains as a load that consumes the regenerative power returned from the train to the overhead line, the regenerative braking may expire and the regenerative brake may not be usable. Therefore, conventionally, a technique has been known in which surplus regenerative power generated when the regenerative power exceeds power running power is converted into AC power and supplied to a station load via an AC system to effectively utilize the surplus regenerative power. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2006-062427

When a load with large fluctuations in power is installed in the station building, the power required to operate the load in the station building may temporarily increase rapidly. For example, in recent years, a plurality of platform doors and the like have been newly installed as a load in the station building. The power consumption of platform doors temporarily increases rapidly because multiple motors operate at the same time during operation. In such a case, the electric power required for the operation of the load in the station building is, for example, to convert the high-voltage AC power supplied from the AC system into low-pressure AC power and supply the electric power to each load in the station building. If the capacity of the transformer is exceeded, it will be temporarily impossible to supply sufficient power to the load inside the station building. Therefore, it is necessary to make up for the temporary shortage of power.

However, in Patent Document 1, in order to utilize the surplus regenerative power generated when the regenerative power exceeds the power running power, the surplus regenerative power is in a state where the power for operating the load in the station building is temporarily insufficient. Without it, there is a risk that the shortage of power cannot be supplemented.

The present invention has been made to solve the above-mentioned problems, and provides a station building auxiliary power supply device capable of supplementing the supply of electric power to a load in a station building regardless of the presence or absence of surplus regenerative electric power. The purpose is to do.

In order to achieve the above object, the station building auxiliary power supply device according to the present invention converts the first electric power supplied from the overhead wire into the second electric power that can be used by the load provided in the station building. It includes a unit and an operation start determination unit that determines whether or not to operate the first power conversion unit based on the load state information indicating the operation state of the load.

According to the station building auxiliary power supply device according to the present invention, the first electric power supplied from the overhead wire is converted into the second electric power that can be used by the load provided in the station building based on the load state information indicating the operating state of the load. Since it is determined whether or not to operate the first power conversion unit to be converted, it is possible to supplement the supply of power to the load in the station building regardless of the presence or absence of surplus regenerative power.

It is a figure which shows an example of the structure of the railway system including the station building auxiliary power supply device which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the structure of the control device of the station building auxiliary power supply device which concerns on Embodiment 1 of this invention. It is a flowchart which shows an example of the processing by the operation start determination part of the station building auxiliary power supply device which concerns on Embodiment 1 of this invention. It is a flowchart which shows an example of the processing by the voltage command value calculation unit of the station building auxiliary power supply device which concerns on Embodiment 1 of this invention. It is a flowchart which shows an example of the processing by the PWM signal generation part of the station building auxiliary power supply device which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the structure of the railway system including the station building auxiliary power supply device which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the structure of the control device of the station building auxiliary power supply device which concerns on Embodiment 2 of this invention. It is a flowchart which shows an example of the processing by the operation start determination part of the station building auxiliary power supply device which concerns on Embodiment 2 of this invention. It is a flowchart which shows an example of the processing by the voltage command value calculation unit of the station building auxiliary power supply device which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the structure of the railway system including the station building auxiliary power supply device which concerns on Embodiment 3 of this invention. It is a figure which shows an example of the structure of the control device of the station building auxiliary power supply device which concerns on Embodiment 3 of this invention. It is a flowchart which shows an example of the processing by the operation start determination part of the station building auxiliary power supply device which concerns on Embodiment 3 of this invention. It is a flowchart which shows an example of the processing by the operation start determination part of the station building auxiliary power supply device which concerns on Embodiment 3 of this invention. It is a flowchart which shows an example of the processing by the voltage command value calculation unit of the station building auxiliary power supply device which concerns on Embodiment 3 of this invention. It is a flowchart which shows an example of the processing by the PWM signal generation part of the station building auxiliary power supply device which concerns on Embodiment 3 of this invention. It is a figure which shows an example of the hardware composition which realizes the control device of the station building auxiliary power supply device which concerns on Embodiment 1 to 3 of this invention.

Hereinafter, an embodiment of the station building auxiliary power supply device according to the present invention will be described with reference to the drawings.

Embodiment 1.
As shown in FIG. 1, the station building auxiliary power supply device 2 provided in the station building 1 includes a control device 3, an inverter (first power conversion unit) 4, a voltage sensor 5, and the like. The station building auxiliary power supply device 2 converts the first electric power (for example, DC1500V) supplied from the overhead line 6 and uses the second electric power used by various loads 7 (7-1 to 7-n) in the station building 1. Is configured to be able to generate. However, the inverter 4 of the station building auxiliary power supply device 2 does not always perform the conversion operation of converting the first electric power into the second electric power, but converts the regenerated electric power generated by each electric vehicle 8 in the railway system into an electric vehicle. Whether or not it can be consumed between 8 (that is, the electric power consumed by another electric vehicle 8 (such as the electric vehicle 8 in power running) than the electric power generated by the electric vehicle 8 decelerating by using the regenerative brake). Is larger), and if it cannot be consumed, the conversion operation is performed.

The load 7 is also supplied with the electric power (for example, AC210V) obtained by converting the electric power (for example, AC6600V) generated from the AC system 200 generated in the substation 100 by the transformer 9 and is also supplied from the transformer 9. Use the supplied power. The load 7 is, for example, various electric facilities such as a lighting device, an air conditioner, a display device, an elevator, an escalator, and a platform door. The overhead wire 6 is connected to the substation 100, and supplies electric power of, for example, DC 1500V to the electric car 8 or the like. Further, in the station building 1, a power detection unit 10 for detecting load power indicating the total power consumed when various loads 7 operate is provided. In the present embodiment, the power detection unit 10 detects, for example, the sum of the power consumed by all the loads 7 provided in the station building 1 as the load power in the power meter.

The control device 3 of the station building auxiliary power supply device 2 is based on the overhead line voltage whether or not it is necessary to receive the regenerative power generated by the electric vehicle 8 in operation via the overhead line 6 and convert it into the power supplied to the load 7. If it is determined that it is necessary, the inverter 4 is controlled to perform the conversion operation. The inverter 4 is configured to include a switching element, and by turning on / off each switching element according to an instruction from the control device 3, a second power supplied from the overhead wire 6 is supplied to the load 7. Convert to power. The voltage sensor 5 measures the overhead wire voltage.

FIG. 2 is a diagram showing an example of the configuration of the control device 3 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention. The control device 3 includes an interface unit 31, an operation start determination unit 32, a storage unit 33, a voltage command value calculation unit 34, and a PWM signal generation unit 35.

The interface unit 31 periodically (for example, every 20 ms) acquires the overhead wire voltage measurement value (hereinafter referred to as “overhead wire voltage”) output from the voltage sensor 5, and obtains the overhead wire voltage to A / D (Analog to). Digital) Convert. Further, the interface unit 31 acquires load state information indicating the operating state of the load 7. In the present embodiment, the interface unit 31 indicates the load power, which is the total power consumed when the various loads 7 output from the power detection unit 10, for example, are operated as the load state information. Information is acquired periodically (for example, every 20 ms), and the power value is A / D (Analog to Digital) converted.

Based on the load state information acquired by the interface unit 31, the operation start determination unit 32 converts the DC power, which is the first power supplied from the overhead wire 6, into the AC power, which is the second power that can be used by the load 7. In order to perform conversion, it is determined whether or not to cause the inverter 4 to perform a conversion operation. Further, the operation start determination unit 32 determines whether or not to cause the inverter 4 to perform the conversion operation based on the overhead wire voltage acquired by the interface unit 31. When, for example, the operation start determination unit 32 decides to cause the inverter 4 to perform the conversion operation, the operation start determination unit 32 generates a signal indicating that the inverter 4 performs the conversion operation and outputs the signal to the voltage command value calculation unit 34.

The storage unit 33 stores, for example, a first threshold value and a second threshold value used by the operation start determination unit 32 for determining whether or not the inverter 4 is to perform a power conversion operation. The first threshold value is used for comparison with the load power indicated by the load power information output from the power detection unit 10. The first threshold value is set in advance based on, for example, the capacity of the transformer 9 for converting high-voltage AC power supplied from the AC system into low-voltage AC power and supplying power to various loads 7. ing. The first threshold value is set to a value at least equal to or less than the capacity of the transformer 9. The second threshold value is used for comparison with the overhead line voltage output from the voltage sensor 5. The second threshold is that when the other electric vehicle 8 as a load for consuming the regenerative power returned from the electric vehicle 8 to the overhead wire 6 is small or absent, the surplus regenerative power becomes various in the station building 1. This is a reference threshold for determining whether or not to cause the inverter 4 to perform a conversion operation in order to supply the load 7.

The voltage command value calculation unit 34 calculates a voltage command value according to the signal, for example, when a signal indicating that the inverter 4 is to perform the conversion operation is input from the operation start determination unit 32. The voltage command value calculation unit 34 outputs the calculated voltage command value to the PWM signal generation unit 35. The PWM signal generation unit 35 generates a PWM (Pulse Width Modulation) signal for controlling the inverter 4 based on the voltage command value input from the voltage command value calculation unit 34.

FIG. 3 is a flowchart showing an example of processing by the operation start determination unit 32 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention. Hereinafter, an example of the processing flow by the operation start determination unit 32 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention will be described with reference to the flowchart of FIG.

As shown in FIG. 3, in step S101, the operation start determination unit 32 calculates the total of the overhead line voltage converted from the interface unit 31 into a digital signal and the electric power consumed when the various loads 7 operate. Acquires the information of the indicated load power. Next, in step S102, the operation start determination unit 32 determines whether or not the load power acquired in step S101 is equal to or greater than the first threshold value stored in the storage unit 33.

If the operation start determination unit 32 determines in step S102 that the load power is equal to or greater than the first threshold value (Yes), the operation start determination unit 32 decides to cause the inverter 4 to perform the conversion operation in step S103. Then, in step S104, the operation start determination unit 32 includes, for example, information indicating that the inverter 4 is to perform the conversion operation, and insufficient power information indicating the difference between the load power and the first threshold value. Generate a signal. In step S105, the operation start determination unit 32 outputs the generated first signal to the voltage command value calculation unit 34.

When the operation start determination unit 32 determines in step S102 that the load power is not equal to or higher than the first threshold value (No), the overhead wire voltage acquired in step S101 is stored in the storage unit 33 in step S106. It is determined whether or not it is equal to or higher than the second threshold value.

If the operation start determination unit 32 determines in step S106 that the overhead line voltage is equal to or higher than the second threshold value (Yes), the operation start determination unit 32 decides to cause the inverter 4 to perform the conversion operation in step S107. Then, in step S108, the operation start determination unit 32 includes, for example, information indicating that the inverter 4 is to perform the conversion operation and surplus regenerative power generation information indicating that surplus regenerative power is being generated. Generate a signal of. In step S109, the operation start determination unit 32 outputs the generated second signal to the voltage command value calculation unit 34.

In step S106, when the operation start determination unit 32 determines that the overhead line voltage is not equal to or higher than the second threshold value (No), in step S110, the operation start determination unit 32 determines whether or not the inverter 4 is performing the conversion operation. .. In step 110, if the operation start determination unit 32 determines that the inverter 4 is performing the conversion operation (Yes), the operation start determination unit 32 determines in step S111 to stop the conversion operation of the inverter 4. In step S112, the operation start determination unit 32 stops the generation and output of the first signal and the second signal when the inverter 4 is performing the change operation.

If it is determined in step S110 that the inverter 4 is not performing the conversion operation (No), the operation start determination unit 32 decides not to cause the inverter 4 to perform the conversion operation in step S113. In the operation start determination unit 32, for example, every time the overhead line voltage and the load power are acquired, the processes after step S102 are repeated.

FIG. 4 is a flowchart showing an example of processing by the voltage command value calculation unit 34 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention. Hereinafter, an example of the processing flow by the voltage command value calculation unit 34 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention will be described with reference to the flowchart of FIG.

As shown in FIG. 4, in step S201, the voltage command value calculation unit 34 determines whether or not the first signal has been input from the operation start determination unit 32. When the voltage command value calculation unit 34 determines in step S201 that the first signal is input (Yes), for example, in step S202, the load power included in the first signal and the first threshold value are determined. The voltage command value is calculated based on the insufficient power information indicating the difference between. That is, the voltage command value is calculated in consideration of how much power is insufficient with respect to the first threshold value on the load 7 side in the station building 1. Then, in step S203, the voltage command value calculation unit 34 outputs the voltage command value calculated in step S202 to the PWM signal generation unit 35.

Further, in step S201, when the voltage command value calculation unit 34 determines that the first signal has not been input (No), whether or not the second signal has been input from the operation start determination unit 32 in S204. Is determined. In step S204, when the voltage command value calculation unit 34 determines that the second signal is input (Yes), in S205, the surplus regeneration is performed based on the surplus regenerative power generation information included in the second signal. Recognizing that electric power is being generated, for example, the voltage command value is calculated based on the set electric power value absorbed by the station building auxiliary power supply device 2 when surplus regenerative electric power is generated. Then, in step S203, the voltage command value calculation unit 34 outputs the voltage command value calculated in step S205 to the PWM signal generation unit 35. Further, in step S204, when the voltage command value calculation unit 34 determines that the second signal is not input (No), the process after step S201 is repeated.

FIG. 5 is a flowchart showing an example of processing by the PWM signal generation unit 35 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention. Hereinafter, an example of the processing flow by the PWM signal generation unit 35 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention will be described with reference to the flowchart of FIG.

As shown in FIG. 5, in step S301, the PWM signal generation unit 35 inputs the voltage command value from the voltage command value calculation unit 34. In step S302, the PWM signal generation unit 35 generates a PWM signal that controls the conversion operation of the inverter 4 based on the voltage command value input in step S301. Then, in step S303, the PWM signal generation unit 35 outputs the PWM signal generated in step S302 to the inverter 4. The inverter 4 performs a conversion operation based on the PWM signal input from the PWM signal generation unit 35.

In the operation start determination unit 32 of the station building auxiliary power supply device 2 according to the first embodiment of the present invention, the load power which is the sum of the powers consumed by all the loads 7 provided in the station building 1 and the first threshold value. Is shown, and an example of deciding whether or not to cause the inverter 4 to execute the conversion operation is shown. However, in the station building auxiliary power supply device 2, it is not always necessary to use the load power, which is the sum of the powers consumed by all the loads 7 provided in the station building 1, when the operation start determination unit 32 processes. It is also possible to use the load power which is the sum of the powers consumed by the specific plurality of set loads 7 or the load power consumed by one specific load 7 which is set in advance. .. For example, in the station building auxiliary power supply device 2, a load 7 other than the load 7 of the lighting device and the air conditioner that is operating almost all the time is set in advance as a specific load 7, and in the operation start determination unit 32, the lighting device, the air conditioner, etc. The load power, which is the sum of the power consumed by the specific load 7 other than the load 7, may be compared with a preset threshold value. The threshold value for comparison with the load power, which is the sum of the powers consumed by the specific plurality of loads 7, or the load power consumed by one specific load 7, is the type of the specific load 7, etc. It may be set as appropriate according to the above, and is not particularly limited. However, the load power which is the sum of the electric power consumed by the specific plurality of loads 7 and the load power consumed by one specific load 7 are the sum of the electric power consumed by all the loads 7. It is expected to be lower than the load power. Therefore, the threshold value for comparing with the load power, which is the sum of the powers consumed by a specific plurality of loads 7, and the threshold value for comparing with the load power consumed by one specific load 7, are all. It is preferable that the values are set lower than the first threshold value for comparison with the load power, which is the total power consumed by the load 7.

Further, in the station building auxiliary power supply device 2 according to the first embodiment of the present invention, the load power, which is the total power consumed when various loads 7 output from the power detection unit 10 operate as load state information. Shows an example of acquiring load power information indicating. However, in the station building auxiliary power supply device 2, it is not always necessary to acquire the load power information by using the power detection unit 10, and for example, it is necessary for the start-up information indicating that the load 7 operates and the operation of the load 7. The control device 3 may acquire information from various loads 7 as load state information, including load power information indicating the electric power. In that case, the operation start determination unit 32 of the control device 3 integrates and processes each load power indicated by each load power information included in the load state information acquired from various loads 7, and sets the first threshold value. Compare.

Further, the station building auxiliary power supply device 2 stores, for example, load power information indicating load power required when various loads 7 operate in advance in the storage unit 33, and starts information for operating the load 7. May be acquired from various loads 7 as load state information. In that case, the operation start determination unit 32 of the control device 3 extracts the load power information of each load 7 corresponding to the various acquired start information from the storage unit 33, and each load indicated by each load power information. The power is integrated and compared with the first threshold.

Further, in the station building auxiliary power supply device 2 according to the first embodiment of the present invention, the operation start determination unit 32 is insufficient to show a difference from the first threshold value when it is determined that the load power is equal to or higher than the first threshold value. A first signal including power information is generated and output to the voltage command value calculation unit 34. Further, when the first signal is input from the operation start determination unit 32, the voltage command value calculation unit 34 gives a voltage command based on the insufficient power information inserted from the first threshold value included in the first signal. The value is being calculated. However, the operation start determination unit 32 does not necessarily include the insufficient power information indicating the difference from the first threshold value in the first signal, and only the information indicating that the inverter 4 performs the conversion operation is the first. It may be included in the signal of. In that case, the voltage command value calculation unit 34 may calculate the voltage command value based on, for example, the set power value absorbed by the station building auxiliary power supply device 2 set in advance.

According to the station building auxiliary power supply device 2 according to the first embodiment of the present invention, the first electric power supplied from the overhead wire 6 is converted into the second electric power that can be used by the load 7 provided in the station building 1. Since it is provided with an inverter 4 which is a power conversion unit of the above, and an operation start determination unit 32 which determines whether or not to cause the inverter 4 to perform a conversion operation based on the load state information indicating the operation state of the load 7. , The power supply to the load 7 in the station building can be supplemented regardless of the presence or absence of surplus regenerative power.

According to the station building auxiliary power supply device 2 according to the first embodiment of the present invention, the load state information includes the load power information indicating the load power consumed by the load 7, and the operation start determination unit 32 is indicated by the load power information. When the load power exceeds the preset first threshold value, it is determined that the first power conversion unit performs the conversion operation. Therefore, when the load power exceeds the first threshold value, the surplus Regardless of the presence or absence of regenerated electric power, the electric power supply to the load 7 in the station building 1 can be supplemented.

According to the station building auxiliary power supply device 2 according to the first embodiment of the present invention, the load power information is information indicating the total load power consumed by the plurality of loads 7 provided in the station building 1, and thus the plurality of loads. When the total load power consumed by 7 exceeds the first threshold value, the power supply to the load 7 in the station building 1 can be supplemented regardless of the presence or absence of surplus regenerated power.

According to the station building auxiliary power supply device 2 according to the first embodiment of the present invention, when the load power indicated by the load power information exceeds the first threshold value, the load power indicated by the load power information and the first threshold value A control signal generation that generates a control signal for causing a voltage command value calculation unit 34 that calculates a voltage command value based on the difference and an inverter 4 that is a first power conversion unit to perform a conversion operation based on the voltage command value. Since the PWM signal generation unit 35, which is a unit, is provided, it is possible to efficiently supply the insufficient power on the load 7 side in the station building 1.

According to the station building auxiliary power supply device 2 according to the first embodiment of the present invention, the first threshold value is the load 7 in the station building 1 by converting the high-voltage AC power supplied from the AC system into the low-voltage AC power. Since the capacity of the transformer 9 for supplying power is set to be less than or equal to the capacity of the transformer 9, the load 7 in the station building 1 is reached before the power on the load 7 side in the station building 1 is insufficient to interfere with the operation of the load 7. It can supply power.

According to the station building auxiliary power supply device 2 according to the first embodiment of the present invention, when the load power indicated by the load power information does not exceed the first threshold value, the operation start determination unit 32 sets the voltage of the overhead wire 6 in advance. It is determined whether or not the set second threshold value is exceeded, and if the voltage of the overhead wire 6 exceeds the second threshold value, it is determined that the first power conversion unit performs the conversion operation. Therefore, the surplus regenerated power can be effectively supplied to the load 7 in the station building 1.

Embodiment 2.
Next, the station building auxiliary power supply device 2a according to the second embodiment of the present invention will be described. FIG. 6 is a diagram showing an example of the configuration of a railway system including the station building auxiliary power supply device 2a according to the second embodiment of the present invention. The same components as those of the station building auxiliary power supply device 2 according to the first embodiment of the present invention are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 6, in the station building auxiliary power supply device 2a according to the second embodiment, load state information is input from a specific load 7 set in advance. As the specific load 7, for example, a plurality of platform doors provided on the platform in the station building 1 are set. Since the motors provided for each of the plurality of platform doors operate at the same time during operation, the power consumption temporarily increases sharply. Therefore, since the power fluctuation is larger than that of the load 7 in the other station building 1, it is conceivable that the power on the load 7 side in the station building 1 may be temporarily insufficient. The specific load 7 is not limited to the platform door, and for example, the electrical equipment newly installed in the station building 1 may be set as the specific load 7. Further, the specific load 7 is not limited to one type of load 7, and a plurality of types of load 7 may be set as the specific load 7. Further, as the load state information, for example, activation information indicating that a specific load 7 operates is used.

FIG. 7 is a diagram showing an example of the configuration of the control device 3a of the station building auxiliary power supply device 2a according to the second embodiment of the present invention. As shown in FIG. 7, the control device 3a includes an interface unit 31a, an operation start determination unit 32a, a storage unit 33a, a voltage command value calculation unit 34a, and a PWM signal generation unit 35a.

For example, the interface unit 31a periodically (for example, every 20 ms) acquires the overhead wire voltage measurement value (hereinafter, referred to as “overhead wire voltage”) output from the voltage sensor 5, and obtains the overhead wire voltage to A / D (Analog to). Digital) Convert.

The operation start determination unit 32a uses the DC power, which is the first power supplied from the overhead wire 6, as the second power that can be used by the load 7, based on the load state information acquired from the specific load 7. It is determined whether or not the inverter 4 is to perform the conversion operation in order to convert to. Further, the operation start determination unit 32a determines whether or not to cause the inverter 4 to perform the conversion operation based on the voltage acquired by the interface unit 31a. When, for example, the operation start determination unit 32a decides to cause the inverter 4 to perform the conversion operation, the operation start determination unit 32a generates a signal indicating that the inverter 4 performs the conversion operation and outputs the signal to the voltage command value calculation unit 34a.

The storage unit 33a is used, for example, for load power information indicating the load power required when the specific load 7 operates, and for determining whether or not the operation start determination unit 32a causes the inverter 4 to perform a power conversion operation. Stores overhead line voltage threshold information and the like. The overhead line voltage threshold is a load that consumes the regenerative power returned from the electric train 8 to the overhead line 6 in the same manner as the second threshold stored in the storage unit 33a of the station building auxiliary power supply device 2 according to the first embodiment. In order to supply the surplus regenerative power to various loads 7 in the station building 1 when the other electric train 8 is small or absent, it is determined whether or not the inverter 4 is to perform a conversion operation. It is a threshold that serves as a reference for performing the above.

The voltage command value calculation unit 34a calculates a voltage command value according to the signal, for example, when a signal indicating that the inverter 4 is to perform the conversion operation is input from the operation start determination unit 32a. The voltage command value calculation unit 34a outputs the calculated voltage command value to the PWM signal generation unit 35a. The PWM signal generation unit 35a generates a PWM (Pulse Width Modulation) signal for controlling the inverter 4 based on the voltage command value input from the voltage command value calculation unit 34a.

FIG. 8 is a flowchart showing an example of processing by the operation start determination unit 32a of the station building auxiliary power supply device 2a according to the second embodiment of the present invention. Hereinafter, an example of the processing flow by the operation start determination unit 32a of the station building auxiliary power supply device 2a according to the second embodiment of the present invention will be described with reference to the flowchart of FIG.

As shown in FIG. 8, in step S401, the operation start determination unit 32a determines whether or not the start information has been acquired as the load state information from the specific load 7. If it is determined in step S401 that the operation start determination unit 32a has acquired the start information from the specific load 7 (Yes), the operation start determination unit 32a decides to cause the inverter 4 to perform the conversion operation in step S402.

In step S403, the operation start determination unit 32a generates a third signal. The operation start determination unit 32a acquires the load power information of the specific load 7 stored in the storage unit 33a, for example, based on the start information of the specific load 7 which is the load state information acquired in step S401. Then, the operation start determination unit 32a generates a third signal including information indicating that the inverter 4 is to perform the conversion operation and load power information of the specific load 7 acquired from the storage unit 33a. In step S404, the operation start determination unit 32a outputs the generated third signal to the voltage command value calculation unit 34a.

If it is determined in step S401 that the operation start determination unit 32a has not acquired the start information from the specific load 7 (No), in step S405, the operation start determination unit 32a acquires the overhead wire voltage converted into the digital signal from the interface unit 31a. To do. Next, in step S406, the operation start determination unit 32a determines whether or not the overhead wire voltage acquired in step S405 is equal to or higher than the overhead wire voltage threshold value stored in the storage unit 33a.

If the operation start determination unit 32a determines in step S406 that the overhead wire voltage is equal to or higher than the overhead wire voltage threshold value (Yes), the operation start determination unit 32a determines in step S407 to cause the inverter 4 to perform a conversion operation. Then, in step S408, the operation start determination unit 32a includes, for example, information indicating that the inverter 4 is to perform the conversion operation and surplus regenerative power generation information indicating that surplus regenerative power is being generated. Generate a signal of. In step S409, the operation start determination unit 32a outputs the generated fourth signal to the voltage command value calculation unit 34a.

If the operation start determination unit 32a determines in step S406 that the overhead wire voltage is not equal to or higher than the overhead wire voltage threshold value (No), in step S410, it determines whether or not the inverter 4 is performing the conversion operation. In step 410, if the operation start determination unit 32a determines that the inverter 4 is performing the conversion operation (Yes), the operation start determination unit 32a determines in step S411 to stop the conversion operation of the inverter 4. In step S412, the operation start determination unit 32a stops the generation and output of the third signal and the fourth signal when the inverter 4 is performing the change operation.

In step S410, when the operation start determination unit 32a determines that the inverter 4 is not performing the conversion operation (No), the operation start determination unit 32a determines in step S413 not to cause the inverter 4 to perform the conversion operation. The operation start determination unit 32a periodically repeats the process from step S401.

FIG. 9 is a flowchart showing an example of processing by the voltage command value calculation unit 34a of the station building auxiliary power supply device 2a according to the second embodiment of the present invention. Hereinafter, an example of the processing flow by the voltage command value calculation unit 34a of the station building auxiliary power supply device 2a according to the second embodiment of the present invention will be described with reference to the flowchart of FIG.

As shown in FIG. 9, in step S501, the voltage command value calculation unit 34a determines whether or not a third signal has been input from the operation start determination unit 32a. When the voltage command value calculation unit 34a determines in step S501 that the third signal is input (Yes), for example, in step S502, the load power information of the specific load 7 included in the third signal. The voltage command value is calculated based on. That is, the voltage command value calculation unit 34a calculates the voltage command value in consideration of the load power required when the specific load 7 operates. Then, in step S503, the voltage command value calculation unit 34a outputs the voltage command value calculated in step S502 to the PWM signal generation unit 35a.

If the voltage command value calculation unit 34a determines in step S501 that the third signal has not been input (No), whether or not the fourth signal has been input from the operation start determination unit 32a in S504. Is determined. In step S504, when the voltage command value calculation unit 34a determines that the fourth signal is input (Yes), in S505, the surplus regeneration is performed based on the surplus regenerative power generation information included in the fourth signal. Recognizing that electric power is being generated, for example, the voltage command value is calculated based on the set electric power value absorbed by the station building auxiliary power supply device 2a when the surplus regenerative electric power is generated. Then, in step S503, the voltage command value calculation unit 34a outputs the voltage command value calculated in step S505 to the PWM signal generation unit 35a. Further, in step S504, when the voltage command value calculation unit 34a determines that the fourth signal is not input (No), the process after step S501 is repeated. The processing by the PWM signal generation unit 35a of the station building auxiliary power supply device 2a according to the second embodiment is the same as the processing by the PWM signal generation unit 35 of the station building auxiliary power supply device 2 according to the first embodiment shown in FIG. Therefore, detailed description will be omitted.

Note that the station building auxiliary power supply device 2a according to the second embodiment of the present invention shows an example in which start-up information is input from a specific load 7 as load state information. However, the load state information is not limited to this. For example, when the specific load 7 is a platform door, the electric vehicle 8 that enters and stops in the station building 1 provided with the platform door. The position information may be acquired as the load status information. In that case, the operation start determination unit 32a generates a third signal when, for example, it detects that the electric vehicle 8 has reached a predetermined specific position based on the position information of the electric vehicle 8. To do. The specific position is set in front of the stop position of the electric vehicle. The platform door starts opening and closing after the electric car 8 stops at the stop position in the station building 1. Therefore, when the electric vehicle 8 reaches a specific position in front of the stop position of the electric vehicle 8, the station building auxiliary power supply device 2a performs a conversion operation on the inverter 4, so that the electric vehicle 8 stops. Since power can be supplied to the load 7 side in the station building 1 before the opening / closing operation of the home door is performed, it is surely prevented that the power shortage on the load 7 side in the station building 1 is temporarily performed. be able to.

The method by which the station building auxiliary power supply device 2a acquires the position information of the electric vehicle 8 is not particularly limited, but for example, the position of the electric vehicle 8 generated by the on-board control device provided in the electric vehicle 8. The information may be directly received by the station building auxiliary power supply device 2a by wireless communication. Further, the station building auxiliary power supply device 2a may receive the position information of the electric vehicle 8 by wire or wirelessly after being transmitted from the on-board control device to the ground control device by wireless communication. Further, the station building auxiliary power supply device 2a may receive not the position information of the electric vehicle 8 but the information indicating that the electric vehicle 8 has reached a specific position. The station building auxiliary power supply device 2a sets, for example, the position of the ground element provided in front of the stop position of the electric vehicle 8 to a specific position, and when the electric vehicle 8 reaches the ground element, the electric vehicle from the ground element. Information indicating that 8 has reached a specific position may be acquired. In that case, the operation start determination unit 32a does not need to detect that the electric vehicle 8 has reached a predetermined specific position based on the position information of the electric vehicle 8, and the electric vehicle 8 is specific. A third signal may be generated when the information indicating that the position has been reached is acquired.

Further, the specific load 7 may be, for example, an elevator or an escalator. When the specific load 7 is an elevator, for example, activation information indicating that the operation is started when the operation button is pressed by the user may be used as the load state information. When the specific load 7 is an escalator, for example, start information indicating that the motion sensor detects the user and starts the operation from the case where the escalator is in the standby state may be used as the load state information.

Further, the station building auxiliary power supply device 2a according to the second embodiment can be combined with the station building auxiliary power supply device 2 according to the first embodiment. For example, the station building auxiliary power supply device 2a also acquires the load power indicating the total power consumed by the various loads 7 from the power detection unit 10 as in the station building auxiliary power supply device 2 according to the first embodiment. Is also good. In that case, in the operation start determination unit 32a of the station building auxiliary power supply device 2a, for example, in addition to the determination as to whether or not the start information is acquired as the load state information of the specific load 7 in step S401 shown in FIG. The determination of whether or not the load power in step S102 shown in the above is equal to or greater than the first threshold value is also included. That is, even if the operation start determination unit 32a does not acquire the start information of the specific load 7, if the load power is equal to or higher than the first threshold value, the inverter 4 is as shown in steps S103 to S105 of FIG. Is determined to perform the conversion operation, and the first signal is generated and output. Further, even when the load power is less than the first threshold value, the operation start determination unit 32a converts the start information of the specific load 7 into the inverter 4 as shown in steps S402 to S404 of FIG. It is decided to carry out the operation, and a third signal is generated and output. Further, the operation start determination unit 32a has acquired the start information of the specific load 7, and when the load power is equal to or higher than the first threshold value, the load power detected by the voltage detection unit 10 is a specific load. When the load power of 7 is also included, the first signal may be generated and output. Further, the operation start determination unit 32a specifies, for example, the load power detected by the voltage detection unit 10 when the start information of the specific load 7 is acquired and the load power is equal to or higher than the first threshold value. When the load power of the load 7 is not included, a signal including the load power information of the specific load 7 acquired from the storage unit 33a and the insufficient power information indicating the difference between the load power and the first threshold value is output. It may be generated. In that case, the voltage command value calculation unit 34a calculates the voltage command value based on the load power information of the specific load 7 and the insufficient power information indicating the difference between the load power and the first threshold value.

According to the station building auxiliary power device 2a according to the second embodiment of the present invention, the operation start determination unit 32a is the first power conversion unit when the load state information of the specific load 7 set in advance is input. Since it is determined that the inverter 4 is to perform the conversion operation, the power can be supplied to the load 7 side of the station building 1 regardless of the presence or absence of the surplus regenerated power, and the specific load 7 in the station building 1 can be supplied. It is possible to prevent the power shortage due to the operation of.

According to the station building auxiliary electric device 2a according to the second embodiment of the present invention, since the specific load 7 is the platform door provided in the station building 1, the power consumption temporarily increases rapidly when the platform door operates. Even in this case, the power can be supplied to the load 7 side of the station building 1 regardless of the presence or absence of the surplus regenerated power, and it is possible to prevent the power shortage due to the operation of the platform door.

According to the station building auxiliary electric device 2a according to the second embodiment of the present invention, the load state information is the position information of the electric vehicle 8 that enters and stops in the station building 1 provided with the platform door, and operates. Since the start determination unit 32a determines that the inverter 4, which is the first power conversion unit, performs the conversion operation based on the position information, it is before the electric vehicle 8 is stopped and the platform door is opened and closed. The inverter 4 can be made to perform the conversion operation. As a result, in the station building auxiliary electric power device 2a, power can be supplied to the load 7 side in the station building 1 before the platform door is opened and closed, so that the station building is temporarily opened and closed as the platform door is opened and closed. It is possible to surely prevent the power shortage on the load 7 side in 1.

According to the station building auxiliary power device 2a according to the second embodiment of the present invention, the operation start determination unit includes a storage unit 33a for storing load power information indicating the load power required when the specific load 7 operates. When the 32a decides to cause the inverter 4, which is the first power conversion unit, to perform the conversion operation, the voltage command value calculation unit 34a that calculates the voltage command value based on the load power information, and the voltage command value. Since the PWM signal generation unit 35a, which is a control signal generation unit that generates a control signal for causing the inverter 4 to perform the conversion operation, is provided, the load in the station building 1 is accompanied by the operation of the specific load 7. It is possible to efficiently supply the amount of electric power that may be insufficient on the 7 side.

According to the station building auxiliary power device 2a according to the second embodiment of the present invention, the operation start determination unit 32a is preset with the voltage of the overhead wire 6 when the load state information of the specific load 7 is not input. It is determined whether or not the overhead line voltage threshold is exceeded, and if the voltage of the overhead line 6 exceeds the overhead line voltage threshold, it is determined that the inverter 4 which is the first power conversion unit performs the conversion operation. , Surplus regenerative power can also be effectively supplied to the load 7 in the station building 1.

Embodiment 3.
Next, the station building auxiliary power supply device 2b according to the third embodiment of the present invention will be described. FIG. 10 is a diagram showing an example of the configuration of a railway system including the station building auxiliary power supply device 2b according to the third embodiment of the present invention. The same components as those of the station building auxiliary

power supply devices

2 and 2a according to the first or second embodiment of the present invention are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 10, in the station building auxiliary power supply device 2b according to the second embodiment, in addition to the configuration of the station building auxiliary power supply device 1 according to the first embodiment, the storage of surplus regenerative power supplied from the overhead wire 6 is stored. A converter (second power conversion unit) 12 provided between the unit 11 and the overhead wire 6 and the power storage unit 11 to convert excess regenerative power and supply the power to the power storage unit 11 and the charge amount of the power storage unit 11 are charged. It further includes a charge amount detecting unit 13 for detecting.

FIG. 11 is a diagram showing an example of the configuration of the control device 3b of the station building auxiliary power supply device 2b according to the third embodiment of the present invention. As shown in FIG. 11, the control device 3b includes an interface unit 31b, an operation start determination unit 32b, a storage unit 33b, a voltage command value calculation unit 34b, and a PWM signal generation unit 35b.

The interface unit 31b periodically (for example, every 20 ms) acquires the overhead wire voltage measurement value (hereinafter referred to as “overhead wire voltage”) output from the voltage sensor 5, and obtains the overhead wire voltage to A / D (Analog to). Digital) Convert. Further, the interface unit 31b acquires load state information indicating the operating state of the load 7. In the present embodiment, the interface unit 31b indicates the load power, which is the total power consumed when various loads 7 output from the power detection unit 10, for example, are operated as the load state information. Information is acquired periodically (for example, every 20 ms), and the power value is A / D (Analog to Digital) converted. Further, the interface unit 31b acquires charge amount information indicating the charge amount charged in the power storage unit 11 from the charge amount detection unit 13.

The operation start determination unit 32b can use the DC power, which is the first power supplied from the overhead wire 6, on the load 7 based on the load state information and the charge amount information acquired by the interface unit 31b, for example. It is determined whether or not the inverter 4 is to perform a conversion operation in order to convert it into AC power, which is electric power, or to convert the charging power stored in the power storage unit 11 into AC power that can be used by the load 7. .. Further, the operation start determination unit 32b determines whether or not to cause the inverter 4 or the converter 12 to perform the conversion operation based on the overhead line voltage and the charge amount information acquired by the interface unit 31b. When the operation start determination unit 32b determines, for example, that the inverter 4 or the converter 12 performs the conversion operation, the operation start determination unit 32b generates a signal indicating that the inverter 4 or the converter 12 performs the conversion operation and calculates the voltage command value. Output to unit 34b.

The storage unit 33b stores, for example, a first threshold value, a second threshold value, and a charge amount threshold value used by the operation start determination unit 32b to determine whether or not the inverter 4 or the converter 12 performs a conversion operation. .. The first threshold value is used for comparison with the load power indicated by the load power information output from the power detection unit 10. The charge amount threshold value is set in advance according to the capacity of the power storage unit 11, and is used for comparison with the charge amount of the power storage unit 11 output from the charge amount detection unit 13.

The voltage command value calculation unit 34b calculates a voltage command value according to the signal, for example, when a signal indicating that the inverter 4 or the converter 12 is to perform the conversion operation is input from the operation start determination unit 32b. The voltage command value calculation unit 34b outputs the calculated voltage command value to the PWM signal generation unit 35b. The PWM signal generation unit 35b generates a PWM (Pulse Width Modulation) signal that controls the inverter 4 or the converter 12 based on the voltage command value input from the voltage command value calculation unit 34b, for example.

12 and 13 are flowcharts showing an example of processing by the operation start determination unit 32b of the station building auxiliary power supply device 2b according to the third embodiment of the present invention. Hereinafter, an example of the processing flow by the operation start determination unit 32b of the station building auxiliary power supply device 2b according to the third embodiment of the present invention will be described with reference to the flowcharts of FIGS. 12 and 13.

As shown in FIG. 12, in step S601, the operation start determination unit 32b is a load indicating the total of the overhead wire voltage converted from the interface unit 31a into a digital signal and the electric power consumed when various loads 7 operate. The electric power information and the charge amount information indicating the charge amount charged in the power storage unit 11 are acquired. Next, in step S602, the operation start determination unit 32b determines whether or not the load power acquired in step S601 is equal to or greater than the first threshold value stored in the storage unit 33b.

If the operation start determination unit 32b determines in step S602 that the load power is equal to or greater than the first threshold value (Yes), the charge amount is equal to or greater than the charge threshold value stored in the storage unit 33b in step S603. Judge whether or not. In step 603, when the operation start determination unit 32b determines that the charge amount is equal to or greater than the charge threshold value (Yes), in S604, the inverter so as to supply power from the power storage unit 11 to the load 7 side in the station building 1. It is decided to have 4 perform the conversion operation. Then, in step S605, the operation start determination unit 32b includes, for example, information indicating that the inverter 4 is to perform the conversion operation, information indicating that power is supplied from the power storage unit 11, load power, and a first threshold value. Generates a fifth signal that includes underpower information indicating the difference between. In step S606, the operation start determination unit 32b outputs the generated fifth signal to the voltage command value calculation unit 34b.

In step 603, when the operation start determination unit 32b determines that the charge amount is not equal to or higher than the charge threshold value (No), the inverter 4 so as to supply electric power from the overhead line 6 to the load 7 side in the station building 1 in S607. Decides to perform the conversion operation. Then, in step S608, the operation start determination unit 32b includes, for example, information indicating that the inverter 4 is to perform the conversion operation, information indicating that power is supplied from the overhead wire 6, load power, and a first threshold value. A sixth signal containing the underpower information indicating the difference between the two is generated. In step S609, the operation start determination unit 32b outputs the generated sixth signal to the voltage command value calculation unit 34b.

If the operation start determination unit 32b determines in step S602 that the load power is not equal to or higher than the first threshold value (No), in step S610, the overhead line voltage is equal to or higher than the second threshold value stored in the storage unit 33b. It is determined whether or not it is.

If the operation start determination unit 32b determines in step S610 that the overhead wire voltage is equal to or higher than the second threshold value (Yes), the operation start determination unit 32b charges the power storage unit 11 using the surplus regenerative power from the overhead wire 6 in step S611. At the same time, it is decided that the inverter 4 and the converter 12 perform a conversion operation so as to supply electric power to the load 7 side in the station building 1. Then, in step S612, the operation start determination unit 32b generates, for example, information indicating that the inverter 4 performs the conversion operation, information indicating that the converter 12 performs the conversion operation, and surplus regenerative power. A seventh signal including surplus regenerative power generation information indicating that the power is generated is generated. In step S613, the operation start determination unit 32b outputs the generated seventh signal to the voltage command value calculation unit 34b. In step S611, when the charge amount of the power storage unit 11 is fully charged, the inverter 4 so as to supply power to the load 7 side in the station building 1 without charging the power storage unit 11. Decides to perform the conversion operation.

When the operation start determination unit 32b determines in step S610 that the overhead line voltage is not equal to or higher than the second threshold value (No), the charge amount of the power storage unit 11 is stored in the storage unit 33b in step S614 shown in FIG. It is determined whether or not it is equal to or higher than the charging threshold value. Note that FIG. 13 shows the details of the process A after the operation start determination unit 32b determines that the overhead line voltage is not equal to or higher than the second threshold value (No) in the process of step S610 of FIG.

In step S614, when the operation start determination unit 32b determines that the charge amount of the power storage unit 11 is equal to or greater than the charge threshold value (Yes), the power storage unit 11 supplies power to the load 7 side in the station building 1 in S615. It is decided that the inverter 4 performs the conversion operation so as to perform the conversion operation. Then, in step S616, the operation start determination unit 32b generates an eighth signal including, for example, information indicating that the inverter 4 is to perform the conversion operation and information indicating that power is supplied from the power storage unit 11. To do. In step S617, the operation start determination unit 32b outputs the generated eighth signal to the voltage command value calculation unit 34b.

If the operation start determination unit 32b determines in step S614 that the charge amount of the power storage unit 11 is not equal to or greater than the charge threshold value (No), whether or not the inverter 4 or the converter 12 is performing the conversion operation in S618. Is determined. If the operation start determination unit 32b determines in step S618 that at least one of the inverter 4 and the converter 12 is performing the conversion operation (Yes), the operation start determination unit 32b performs the conversion operation of the inverter 4 and the converter 12 in step S619. Decide to stop. In step S620, the operation start determination unit 32b stops the generation and output of the fifth to eighth signals when at least one of the inverter 4 and the converter 12 is performing the conversion operation.

In step S618, when it is determined that neither the inverter 4 nor the converter 12 is performing the conversion operation (No), the operation start determination unit 32b decides not to cause the inverter 4 and the converter 12 to perform the conversion operation. In the operation start determination unit 32b, for example, every time the overhead line voltage and the load power are acquired, the processes after step S602 are repeated. Further, the charge amount information may be acquired from the charge amount detection unit 13 between steps S602 and S603 shown in FIG. 12 and between steps S610 and step S614 shown in FIG. Further, although the same charge threshold value is used in the determination in step S603 and step S614, the determination may be performed using different charge threshold values.

FIG. 14 is a flowchart showing an example of processing by the voltage command value calculation unit 34b of the station building auxiliary power supply device 2b according to the third embodiment of the present invention. Hereinafter, an example of the processing flow by the voltage command value calculation unit 34b of the station building auxiliary power supply device 2b according to the third embodiment of the present invention will be described with reference to the flowchart of FIG.

As shown in FIG. 14, in step S701, the voltage command value calculation unit 34b determines whether or not a fifth signal has been input from the operation start determination unit 32b. When the voltage command value calculation unit 34b determines in step S701 that the fifth signal is input (Yes), for example, in step S702, the voltage command value calculation unit 34b calculates the voltage command value based on the fifth signal. The voltage command value based on the fifth signal is for executing the conversion operation of the inverter 4 so as to supply power from the power storage unit 11 to the load 7 side in the station building 1, and is the load power and the first. It is calculated based on the insufficient power information indicating the difference from the threshold value. Then, in step S703, the voltage command value calculation unit 34b outputs the voltage command value calculated in step S702 to the PWM signal generation unit 35b.

If the voltage command value calculation unit 34b determines in step S701 that the fifth signal has not been input (No), it determines whether or not the sixth signal has been input from the operation start determination unit 32b in S704. judge. If it is determined in step S704 that the voltage command value calculation unit 34b has input the sixth signal (Yes), the voltage command value calculation unit 34b calculates the voltage command value based on the sixth signal in S705. The voltage command value based on the sixth signal is for performing the conversion operation of the inverter 4 so as to supply power from the overhead wire 6 to the load 7 side in the station building 1, and is the load power and the first threshold value. It is calculated based on the insufficient power information indicating the difference from. Then, in step S703, the voltage command value calculation unit 34b outputs the voltage command value calculated in step S705 to the PWM signal generation unit 35b.

If the voltage command value calculation unit 34b determines in step S704 that the sixth signal has not been input (No), it determines whether or not the seventh signal has been input from the operation start determination unit 32b in S706. judge. If it is determined in step S706 that the seventh signal has been input (Yes), the voltage command value calculation unit 34b calculates the voltage command value based on the seventh signal in S707. The voltage command value based on the seventh signal is for charging the power storage unit 11 with the surplus regenerative power and performing the conversion operation of the inverter 4 and the converter 12 so as to supply the power to the load 7 side in the station building 1. This is calculated based on, for example, a preset power value absorbed by the station building auxiliary power supply device 2b when surplus regenerative power is generated. Then, in step S703, the voltage command value calculation unit 34b outputs the voltage command value calculated in step S707 to the PWM signal generation unit 35b.

If the voltage command value calculation unit 34b determines in step S706 that the seventh signal has not been input (No), in step S708, whether or not the eighth signal has been input from the operation start determination unit 32b is determined. judge. If it is determined in step S708 that the eighth signal has been input (Yes), the voltage command value calculation unit 34b calculates the voltage command value based on the eighth signal in S709. The voltage command value based on the eighth signal is for causing the conversion operation of the inverter 4 to supply electric power from the power storage unit 11 to the load 7 side in the station building 1, and is set in advance, for example. It is calculated based on the set power value. Then, in step S703, the voltage command value calculation unit 34b outputs the voltage command value calculated in step S709 to the PWM signal generation unit 35b. Further, in step S708, when the voltage command value calculation unit 34 determines that the eighth signal is not input (No), the process after step S701 is repeated.

FIG. 15 is a flowchart showing an example of processing by the PWM signal generation unit 35b of the station building auxiliary power supply device 2b according to the third embodiment of the present invention. Hereinafter, an example of the processing flow by the PWM signal generation unit 35b of the station building auxiliary power supply device 2b according to the third embodiment of the present invention will be described with reference to the flowchart of FIG.

As shown in FIG. 15, in step S801, the PWM signal generation unit 35b receives the voltage command value from the voltage command value calculation unit 34b. In step S802, the PWM signal generation unit 35b generates a PWM signal that controls the conversion operation of the inverter 4 or the converter 12 based on the voltage command value input in step S801. Then, in step S303, the PWM signal generation unit 35b outputs the PWM signal generated in step S302 to the inverter 4 or the converter 12. The inverter 4 and the converter perform a conversion operation based on the PWM signal input from the PWM signal generation unit 35b.

It should be noted that, like the station building auxiliary power supply device 2b according to the third embodiment of the present invention, the power storage unit 11 for storing the surplus regenerative power supplied from the overhead wire 6 is provided between the overhead wire 6 and the power storage unit 11, and the surplus The configuration including a converter (second power conversion unit) 12 that converts regenerative power into electric power and supplies it to the power storage unit 11 and a charge amount detection unit 13 that detects the charge amount of the power storage unit 11 is in the second embodiment. It is also applicable to the station building auxiliary power supply device 2a. In that case, the storage unit 33a of the station building auxiliary power supply device 2a according to the second embodiment stores a charge amount threshold value for use by the operation start determination unit 31a for comparison with the charge amount output from the charge amount detection unit 13. I will do it.

Further, the operation start determination unit 31a may, for example, determine between step S401 and step S402 shown in FIG. 8 whether or not the amount of stored electricity is equal to or greater than the charge amount threshold value. Then, when the operation start determination unit 31a acquires the load state information from the specific load 7 and the charge amount is equal to or more than the charge amount threshold value, the power storage unit 11 supplies electric power to the load 7 side in the station building 1. It is decided to carry out the conversion operation of the inverter 4 so as to supply the power. The operation start determination unit 31a supplies power from the overhead line 6 to the load 7 side in the station building 1 when the load state information is acquired from the specific load 7 and the charge amount is less than the charge amount threshold value. Decides to have the inverter perform the conversion operation. As a result, in the station building auxiliary power supply device 2b, when the charge amount of the power storage unit 11 is equal to or more than the charge amount threshold value, even if the surplus regenerative power is not generated, the power on the overhead line 6 side is not used and the inside of the station building 1 is used. The power supply to the load 7 can be supplemented.

According to the station building auxiliary power device 2b according to the third embodiment of the present invention, the power storage unit 11 for storing the surplus regenerated electric power supplied from the overhead wire 6 is provided between the overhead wire 6 and the power storage unit 11, and the overhead wire 6 is provided. When the voltage of the power exceeds the second threshold value, the converter 12 which is the second power conversion unit that converts the surplus regenerated power into power and supplies it to the power storage unit 11 and the charge that detects the charge amount of the power storage unit 11. The operation start determination unit 31b includes the amount detection unit 13, and when the load power indicated by the load power information exceeds the first threshold value, the charge amount detected by the charge amount detection unit 13 is preset. It is determined whether or not the charge amount is equal to or higher than the charge amount threshold, and if the charge amount is equal to or higher than the charge amount threshold, it is determined to cause the inverter 4 to perform a conversion operation so as to supply power from the power storage unit 11 to the load 7, and charge the battery. If the amount is less than the charge amount threshold, it is determined that the inverter 4 performs the conversion operation so as to supply power from the overhead wire 6 to the load 7, so that the load in the station building 1 is irrespective of the presence or absence of surplus regenerated power. The power supply to 7 can be supplemented. Further, when the charge amount of the power storage unit 11 is equal to or more than the charge amount threshold value, the power is supplied to the load 7 in the station building 1 without using the power on the overhead line 6 side even when the surplus regenerative power is not generated. Can be supplemented.

Note that the control devices 3 to 3b of the station building auxiliary power supply devices 2 to 2b according to the first to third embodiments of the present invention include, for example, a processor and a memory, and the operation of each part can be realized by software. FIG. 16 is a diagram showing an example of a hardware configuration that realizes the control devices 3 to 3b of the station building auxiliary power supply devices 2 to 2b according to the first to third embodiments of the present invention. As shown in FIG. 16, the control devices 3 to 3b of the station building auxiliary power supply devices 2 to 2b according to the first to third embodiments of the present invention include the processor 91 and the memory 92, and the processor 91 and the memory 92 include the processor 91 and the memory 92. It is connected by the system bus 93. The processor 91 performs calculation and control by software using the input data, and the memory 92 stores the input data or data and programs necessary for the processor 91 to perform calculation and control. A plurality of processors 91 and a plurality of memories 92 may be provided.

Further, in the station building auxiliary power supply devices 2 to 2b according to the first to third embodiments of the present invention, an example in which the electric power from the DC overhead line 6 is supplied to the load 7 side in the station building 1 is shown, but the DC overhead line 6 is used. The present invention is not limited to this, and the present invention is also applicable to AC overhead wires.

Further, the present invention is not limited to the above-described embodiment, and each embodiment can be appropriately changed or omitted without departing from the scope of the idea of the present invention.

1 station building, 2 to 2b station building auxiliary power supply device, 3 to 3b control device, 4 inverter (first power conversion unit), 5 voltage sensor, 6 overhead line, 7,7-1 to 7-n load, 8 electric vehicle, 9 transformer, 10 power detector, 11 power storage unit, 12 converter (second power conversion unit), 13 charge amount detection unit, 31-31b interface unit, 32-32b operation start determination unit, 33-33b storage unit, 34-34b voltage command value calculation unit, 35-35b PWM signal generation unit, 100 substation, 200 AC system

Claims

A first power conversion unit that converts the first power supplied from the overhead line into a second power that can be used by the load provided in the station building.
An operation start determination unit that determines whether or not to cause the first power conversion unit to perform a conversion operation based on the load state information indicating the operation state of the load.
A station building auxiliary power supply that is characterized by being equipped with.
The load state information includes load power information indicating the load power consumed by the load.
When the load power indicated by the load power information exceeds a preset first threshold value, the operation start determination unit determines that the first power conversion unit performs a conversion operation. The station building auxiliary power supply device according to claim 1.
The station building auxiliary power supply device according to claim 2, wherein the load power information is information indicating the sum of the load powers consumed by the plurality of loads provided in the station building.
A voltage for calculating a voltage command value based on the difference between the load power indicated by the load power information and the first threshold value when the load power indicated by the load power information exceeds the first threshold value. Command value calculation unit and
The station building according to claim 2 or 3, further comprising a control signal generation unit that generates a control signal that causes the first power conversion unit to perform a conversion operation based on the voltage command value. Auxiliary power supply.
The first threshold value is set to be equal to or less than the capacity of a transformer for converting high-voltage AC power supplied from the AC system into low-voltage AC power and supplying power to the load in the station building. The station building auxiliary power supply device according to any one of claims 2 to 4, wherein the station building auxiliary power supply device is characterized.
When the load power indicated by the load power information does not exceed the first threshold value, the operation start determination unit determines whether or not the voltage of the overhead wire exceeds a preset second threshold value. Claims 2 to 5 are characterized in that, when the determination is made and the voltage of the overhead wire exceeds the second threshold value, it is determined that the first power conversion unit performs the conversion operation. The station building auxiliary power supply according to any one item.
A power storage unit that stores surplus regenerative power supplied from the overhead wire,
A second power conversion provided between the overhead wire and the power storage unit, which converts the surplus regenerative power into power and supplies it to the power storage unit when the voltage of the overhead wire exceeds the second threshold value. Department and
A charge amount detection unit for detecting the charge amount of the power storage unit is provided.
When the load power indicated by the load power information exceeds the first threshold value, the operation start determination unit determines that the charge amount detected by the charge amount detection unit is equal to or higher than a preset charge amount threshold value. Judge whether or not
When the charge amount is equal to or greater than the charge amount threshold value, it is determined that the first power conversion unit performs a conversion operation so as to supply power from the power storage unit to the load.
6. The claim 6 is characterized in that when the charge amount is less than the charge amount threshold value, it is determined that the first power conversion unit performs a conversion operation so as to supply power from the overhead wire to the load. Station building auxiliary power supply described in.
The claim is characterized in that the operation start determination unit determines that the first power conversion unit performs a conversion operation when the load state information of a specific load set in advance is input. The station building auxiliary power supply device according to 1.
The station building auxiliary power supply device according to claim 8, wherein the specific load is a platform door provided in the station building.
The load state information is position information of an electric vehicle that enters and stops in the station building provided with the platform door.
The station building auxiliary power supply device according to claim 9, wherein the operation start determination unit determines to have the first power conversion unit perform a conversion operation based on the position information.
A storage unit for storing load power information indicating the load power required when the specific load operates is provided.
A voltage command value calculation unit that calculates a voltage command value based on the load power information when the operation start determination unit determines that the first power conversion unit performs a conversion operation.
Any one of claims 8 to 10, wherein the first power conversion unit is provided with a control signal generation unit that generates a control signal that causes the first power conversion unit to perform a conversion operation based on the voltage command value. Station building auxiliary power supply as described in the section.
When the load state information of the specific load is not input, the operation start determination unit determines whether or not the voltage of the overhead wire exceeds a preset overhead wire voltage threshold value, and determines whether or not the voltage of the overhead wire exceeds a preset overhead wire voltage threshold value. The method according to any one of claims 8 to 11, wherein when the voltage exceeds the overhead line voltage threshold value, it is determined that the first power conversion unit performs the conversion operation. Station building auxiliary power supply.
A power storage unit that stores surplus regenerative power supplied from the overhead wire,
A second power conversion provided between the overhead wire and the power storage unit, which converts the surplus regenerative power into power and supplies it to the power storage unit when the load state information of the specific load is not input. Department and
A charge amount detection unit for detecting the charge amount of the power storage unit is provided.
When the load state information of the specific load is input, the operation start determination unit determines whether or not the charge amount detected by the charge amount detection unit is equal to or greater than a preset charge amount threshold value. And
When the charge amount is equal to or greater than the charge amount threshold value, it is determined that the first power conversion unit performs a conversion operation so as to supply power from the power storage unit to the load.
12. Claim 12 is characterized in that when the charge amount is less than the charge amount threshold value, it is determined that the first power conversion unit performs a conversion operation so as to supply power from the overhead wire to the load. Station building auxiliary power supply described in.