Information presentation device, information presentation system, and information presentation method

Abstract

To provide an information presentation device capable of managing the electrical state of at least one of an electric-car line and a power storage device.SOLUTION: An information presentation device 200 is connected to a communication unit 140 electrically connected to an electric-car line 4 and a power storage device (one of first and second power storage devices 120 and 130) and a client device 300 via a communication network 400 to present information to the client device 300. This information presentation device comprises: an information acquisition unit 210 that acquires electric-car line information 141 indicating the electrical state of the electric-car line 4 and power storage information 142 indicating the electrical state of the power storage device from the communication unit 140; and an information transmission unit 220 that transmits, to the client device 300, at least one of first data 221 for displaying the electric-car line information 141 and the power storage information 142 in association with a time base and second data 222 for displaying a frequency distribution of the electric-car line information 141.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an information presentation device, an information presentation system, and an information presentation method for presenting information about electric train lines. [Background technology]

[0002] Patent Document 1 discloses a configuration in which overhead line power is converted and supplied with DC power in a railway vehicle, the DC power is used to charge a power storage system, and the power from the power storage system is supplied to the railway vehicle in a non-electrified section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-189062 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional configuration disclosed in the above Patent Document 1, the electrical state of the electric train line (overhead line), such as the voltage of the electric train line, or the electrical state of the power storage device, such as the SOC (State Of Charge) of the power storage device (power storage system), fluctuates. The above conventional configuration does not maintain the electrical state of the electric train line or the power storage device in an appropriate state.

[0005] An object of the present invention is to provide an information presentation device, an information presentation system, and an information presentation method that enable management of the electrical state of at least one of an electric train line and an electrical storage device. [Means for solving the problem]

[0006] An information presentation device according to one embodiment of the present invention is connected to a communication unit electrically connected to an electric train line that supplies power to a train and to a power storage device electrically connected to the electric train line and to a client device via a communication network to present information to the client device, and includes an information acquisition unit that acquires, from the communication unit, electric train line information indicating an electrical state of the electric train line and power storage information indicating an electrical state of the power storage device, and an information transmission unit that transmits to the client device at least one of first data for displaying the electric train line information and the power storage information in correspondence with a time axis and second data for displaying a frequency distribution of the electric train line information.

[0007] The present invention can be realized not only as such an information presentation device, but also as an information presentation system including an information presentation device, a power storage device, and a communication unit. The present invention can also be realized as an information presentation method including processing performed in the information presentation device. The present invention can also be realized as a program for causing a computer to execute processing included in the information presentation method, and can also be realized as a computer-readable recording medium such as a CD-ROM on which the program is recorded. The program can be distributed via the recording medium and a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit including a processing unit included in the information presentation device. Effect of the Invention

[0008] According to the information presentation device and the like of the present invention, it becomes possible to manage the electrical state of at least one of the electric train line and the power storage device. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing a configuration of an information presentation system according to an embodiment. [Diagram 2] 2 is a block diagram showing a functional configuration of an information presentation device included in the information presentation system according to the embodiment. FIG. [Diagram 3]5A to 5C are diagrams illustrating effective current information acquired by an information acquisition unit according to an embodiment. [Figure 4] 11 is a diagram illustrating an example of first data transmitted to a client device by an information transmitting unit according to the embodiment. FIG. [Diagram 5] 11 is a diagram illustrating an example of second data transmitted to a client device by an information transmitting unit according to the embodiment. FIG. [Figure 6] 4 is a flowchart showing a process (information presentation method) performed by the information presentation device according to the embodiment. [Figure 7A] 10 is a diagram showing an example of first data when the SOC of the power storage device according to the embodiment is low. FIG. [Figure 7B] 10 is a diagram showing an example of first data when the SOC of the power storage device according to the embodiment is high. FIG. [Figure 8] FIG. 11 is a diagram showing an example of second data in a case where the frequency distribution of the voltage values ​​of the electric rail in the embodiment varies. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] An information presentation device according to one embodiment of the present invention is connected to a communication unit electrically connected to an electric train line that supplies power to a train and to a power storage device electrically connected to the electric train line and to a client device via a communication network to present information to the client device, and includes an information acquisition unit that acquires, from the communication unit, electric train line information indicating an electrical state of the electric train line and power storage information indicating an electrical state of the power storage device, and an information transmission unit that transmits to the client device at least one of first data for displaying the electric train line information and the power storage information in correspondence with a time axis and second data for displaying a frequency distribution of the electric train line information.

[0011] According to this, the information presentation device transmits to the client device at least one of the first data for displaying the electric train line information and the power storage information acquired from the communication unit in association with a time axis, and the second data for displaying the frequency distribution of the electric train line information. In this way, the information presentation device transmits at least one of the first data and the second data to the client device, so that at least one of the first data and the second data can be viewed on the client device. If the first data can be viewed on the client device, the electrical states of the electric train line and the power storage device over time can be grasped, so that the electrical state of at least one of the electric train line and the power storage device can be remotely monitored and information can be provided. If the second data can be viewed on the client device, the frequency distribution of the electric train line information can be grasped, so that the electrical state of at least one of the electric train line and the power storage device can be remotely monitored and information can be provided. As a result, it is not necessary to check the electrical state of at least one of the electric train line and the power storage device at the site, and remote monitoring and information can be provided by a client device away from the site, making it possible to manage the electrical state.

[0012] The information transmission unit may create, as the first data, screen data in which the electric train line information and the power storage information are displayed in association with a time axis, and transmit the created screen data to the client device.

[0013] According to this, the information presentation device creates screen data in which the electric train line information and the power storage information are associated with a time axis and transmits the screen data to the client device, so that the screen data can be viewed on the client device. By viewing this screen data, the electrical states of the electric train line and the power storage device over time can be easily grasped, so that the electrical state of at least one of the electric train line and the power storage device can be easily remotely monitored and information can be provided. This makes it possible to easily manage the electrical state of at least one of the electric train line and the power storage device by remotely monitoring and providing information on the electrical state of the electric train line and / or the power storage device on a client device away from the site.

[0014] The information acquisition unit may acquire, as the electric train line information, information including voltage information indicating a voltage of the electric train line, and acquire, as the power storage information, information including SOC (State Of Charge) information indicating a SOC of the power storage device, and the information transmission unit may transmit, as the first data, data for displaying the voltage information and the SOC information in correspondence with a time axis to the client device.

[0015] According to this, the information presentation device acquires voltage information and SOC information, and transmits first data for displaying the voltage information and SOC information in association with a time axis to the client device, so that the first data can be viewed on the client device. If the first data can be viewed on the client device, the voltage of the electric train line and the SOC of the power storage device over time can be grasped, and therefore remote monitoring and information provision can be made according to changes in the voltage of the electric train line and the SOC of the power storage device. For example, when the SOC of the power storage device is low, it becomes necessary to limit the discharge current of the power storage device, and there is a risk that the voltage of the electric train line cannot be effectively increased. For this reason, during a time period when the SOC of the power storage device tends to be low, information is provided for lowering the discharge start voltage of the electric train line to make it difficult for the power storage device to be discharged, or for lowering the charge start voltage of the electric train line to make it easy for the power storage device to be charged, thereby contributing to suppressing a decrease in the SOC of the power storage device. The same applies when the SOC of the power storage device is high. As a result, it is not necessary to check the electrical state of at least one of the electric train line and the power storage device at the site, and remote monitoring and information provision can be made by a client device away from the site, and management can be made.

[0016] The information transmission unit may create a histogram indicating a frequency distribution of values ​​of the electric train line information as the second data, and transmit the created histogram to the client device.

[0017] According to this, the information presentation device creates a histogram showing the frequency distribution of the values ​​of the electric train line information and transmits it to the client device, so that the histogram can be viewed on the client device. By viewing this histogram, the electrical state of the electric train line can be easily understood, so that the electrical state of at least one of the electric train line and the power storage device can be easily remotely monitored and information can be provided. This makes it possible to easily manage the electrical state of at least one of the electric train line and the power storage device by remotely monitoring and providing information on it from a client device away from the site.

[0018] The information acquisition unit may acquire, as the electric train line information, information including voltage information indicating a voltage of the electric train line, and the information transmission unit may transmit, as the second data, data for displaying a frequency distribution of voltage values ​​indicated by the voltage information to the client device.

[0019] According to this, the information presentation device acquires voltage information and transmits second data for displaying a frequency distribution of the voltage values ​​of the electric power line to the client device, so that the second data can be viewed on the client device. If the second data can be viewed on the client device, the frequency distribution of the voltage values ​​of the electric power line can be grasped, and remote monitoring and information provision can be made according to the frequency distribution of the voltage values ​​of the electric power line. For example, by grasping the frequency distribution of the voltage values ​​of the electric power line and then providing information for adjusting the charging start voltage and discharging start voltage of the electric power line and the SOC of the power storage device, etc., it is possible to contribute to controlling the frequency of the voltage values ​​of the electric power line so that they are well-balanced and fall within a certain range. This makes it possible to remotely monitor and provide information on the electrical state of at least one of the electric power line and the power storage device by a client device away from the site, without the need to check the electrical state on site, and to manage the electrical state.

[0020] The information acquisition unit may acquire the electric train line information from a power conversion device disposed between the electric train line and the power storage device via the communication unit.

[0021] According to this, the information display device does not need to obtain the electric train line information directly from the electric train line because it obtains the electric train line information from a power conversion device such as a converter installed between the electric train line and the power storage device. This allows the information display device to easily obtain the electric train line information, making it possible to easily manage the electrical state of at least one of the electric train line and the power storage device.

[0022] Hereinafter, an information presentation device, an information presentation system, and an information presentation method according to an embodiment of the present invention (including its modified examples) will be described with reference to the drawings. The embodiments described below are all comprehensive or specific examples. The numerical values, components, the arrangement and connection forms of the components, the control processes, and the order of the control processes shown in the following embodiments are merely examples and are not intended to limit the present invention. Each figure is a schematic diagram and is not necessarily a precise illustration. In each figure, the same or similar components are given the same symbols.

[0023] (Embodiment) [1 Explanation of the configuration of information presentation system 10] First, a configuration of an information presentation system 10 including an information presentation device 200 will be described. Fig. 1 is a schematic diagram showing a configuration of the information presentation system 10 according to the present embodiment. Specifically, Fig. 1 shows an overview of the configuration of the information presentation system 10 and the connection relationship between the information presentation system 10, a train system 1, and a client device 300.

[0024] 1, the information presentation system 10 is a facility that includes a power storage facility 100 and an information presentation device 200, and presents information to a client device 300. Specifically, the information presentation system 10 is electrically connected to a train system 1, and is also connected to the client device 300 via a communication network 400, and transmits information of the train system 1 and the information presentation system 10 to the client device 300. The communication network 400 is a computer network, such as the Internet, a wired or wireless LAN (Local Area Network), or the like.

[0025] The train system 1 includes a substation 2, a train 3, a contact line 4, and a station 5. The substation 2 converts AC power supplied from a power plant 6 owned by an electric power company or the like into DC power, and then steps down the voltage to a voltage usable by the train 3, such as 1500V, rectifies the voltage, and supplies the DC power to the contact line 4. The contact line 4 is a linearly arranged power supply body (power line, electric wire), such as an overhead line for power transmission, two rails for power transmission, one rail for power transmission used in a monorail or the like, a third rail for power transmission added to two rails used in a subway or the like, or an electromagnet used in a linear motor or the like. The contact line 4 supplies power to the train 3. The train 3 is an electric vehicle that runs using DC power supplied via the contact line 4. The train 3 is a vehicle capable of power regeneration, configured to generate regenerative power during braking, and supplies the generated regenerative power to the contact line 4. An example of regenerative power is regenerative power generated by regenerative braking, which rotates a motor as a generator to generate power when braking the train 3. Stations 5 are located along the tracks (railroad tracks) of the train 3 and are stations where the train 3 can stop.

[0026] The power storage equipment 100 is electrically connected to the electric train line 4, that is, electrically connected to the train system 1 via the electric train line 4. The power storage equipment 100 is configured to store surplus power generated in the train system 1 and to supply the stored power to the train system 1. The power storage equipment 100 may be installed in a substation 2, or in a station 5, or may be installed between two stations 5 or in a train depot for the train 3. The power storage equipment 100 has a power conversion device 110, a first power storage device 120, a second power storage device 130, and a communication unit 140.

[0027] The power conversion device 110 is disposed between the train system 1 (specifically, the electric train line 4) and the first and second power storage devices 120 and 130, and is electrically connected to the train system 1 (the electric train line 4) and the first and second power storage devices 120 and 130. The power conversion device 110 adjusts the power supplied from the electric train line 4, such as by step-down conversion, to a voltage suitable for storage in the first or second power storage device 120 or 130, and supplies the power to the first or second power storage device 120 or 130. The power conversion device 110 adjusts the power from the first or second power storage device 120 or 130, such as by step-up conversion, to a voltage suitable for the train system 1, and supplies the power to the train system 1. In this embodiment, the power conversion device 110 is a power converter (DC / DC converter) that performs conversion between direct current power. The power conversion device 110 may be configured as an independent device, or may be incorporated into a device as a circuit.

[0028] The first power storage device 120 and the second power storage device 130 are devices (battery panels) that can be charged with electricity from the outside and discharge electricity to the outside. The first power storage device 120 and the second power storage device 130 are electrically connected to the electric train line 4 via the power conversion device 110, and charge with power from the electric train line 4 and discharge power to the electric train line 4 via the power conversion device 110. Specifically, the first power storage device 120 and the second power storage device 130 each have a plurality of power storage elements. The power storage elements are secondary batteries (single cells) that can be charged with electricity and discharged with electricity, and are, for example, non-aqueous electrolyte secondary batteries such as lithium ion secondary batteries. The power storage elements are not limited to non-aqueous electrolyte secondary batteries, and may be secondary batteries other than non-aqueous electrolyte secondary batteries, capacitors, primary batteries, batteries using a solid electrolyte, or the like.

[0029] The first power storage device 120 mainly stores surplus power when the electric train line 4 generates the surplus power, and supplies power to the electric train line 4 when the electric train line 4 runs short of power. The surplus power is power that is supplied from the substation 2 to the electric train line 4 but not used by the electric train 3, or regenerated power of the electric train 3, etc. In other words, the first power storage device 120 frequently repeats charging and discharging to adjust the voltage of the electric train line 4. The first power storage device 120 is used while being charged to a state of charge (SOC) of about 50% and maintained therein (for example, charging and discharging are repeated at an SOC between about 15% and about 85%).

[0030] Specifically, the storage elements of the first power storage device 120 have characteristics that reduce deterioration in capabilities such as durability and performance sustainability with respect to repeated charging and discharging, compared to the storage elements of the second power storage device 130. In other words, the storage elements of the first power storage device 120 have characteristics more suitable for inputting and outputting large currents (higher rate characteristics than the storage elements of the second power storage device 130) than the storage elements of the second power storage device 130. In this embodiment, the first power storage device 120 is used when the train system 1 is operating normally.

[0031] The second power storage device 130 mainly supplies power to the train line 4 during abnormal operation (emergency) of the train system 1. This allows the train 3 to be stopped at a desirable location such as the station 5, rather than at an undesirable location such as a location far from the station 5, thereby enabling safe operation management of the train 3. The second power storage device 130 is always charged and maintained in a fully charged state when used (e.g., has an SOC close to 100%). Specifically, the power storage elements of the second power storage device 130 have higher energy density (higher capacity) characteristics than the power storage elements of the first power storage device 120.

[0032] The communication unit 140 is electrically connected to the electric train line 4 via the power conversion device 110, and is also electrically connected to at least one of the first power storage device 120 and the second power storage device 130, to monitor the electrical state of the electric train line 4 and at least one of the first power storage device 120 and the second power storage device 130. Specifically, the communication unit 140 is electrically connected to both the first power storage device 120 and the second power storage device 130, and acquires information of both the first power storage device 120 and the second power storage device 130. Furthermore, the communication unit 140 is connected to the information presentation device 200 via a communication network 400, and transmits information of the electric train line 4 and the first power storage device 120 and the second power storage device 130 to the information presentation device 200. In this embodiment, the communication unit 140 acquires electric train line information 141 (described later) from the electric train line 4 via the power conversion device 110, acquires power storage information 142 (described later) from the first power storage device 120 and the second power storage device 130, and transmits the electric train line information 141 and the power storage information 142 to the information presentation device 200 (see FIG. 2). The electric train line information 141 and the power storage information 142 will be described in detail later.

[0033] The information presentation device 200 is a device (server) that is connected to the power storage facility 100 (specifically, the communication unit 140) and the client device 300 via a communication network 400 and presents information to the client device 300. The information presentation device 200 may be realized by a general-purpose computer system such as a personal computer executing a program, or may be realized by a dedicated computer system. The information presentation device 200 may be installed anywhere, but may be installed in a building or the like away from the train system 1 and the power storage facility 100. Specifically, the information presentation device 200 acquires electric train line information 141 and power storage information 142 from the communication unit 140, creates first data 221 and second data 222 described below, and transmits the created first data 221 and second data 222 to the client device 300 (see FIG. 2). A detailed description of the configuration of the information presentation device 200 and the processing performed by the information presentation device 200 will be described later.

[0034] The client device 300 is a device that is connected to the information presentation device 200 via a communication network 400 and acquires information from the information presentation device 200. In this embodiment, the client device 300 is also connected to the power storage facility 100 (specifically, the communication unit 140) via the communication network 400, and is configured to be able to acquire information on the train system 1 (the electric train line 4) and the power storage facility 100. The client device 300 may be realized by a general-purpose computer system such as a personal computer executing a program, or may be realized by a dedicated computer system. In this embodiment, the client device 300 is a personal computer equipped with an input unit such as a keyboard and a mouse, and a display unit 310 such as a liquid crystal display (see FIG. 4, etc.). The client device 300 may be installed anywhere, but may be installed in a building or the like that is separate from the train system 1, the power storage facility 100, and the information presentation device 200.

[0035] [2. Functional Configuration of Information Presentation Device 200] Next, a detailed description will be given of the functional configuration of the information presentation device 200. Fig. 2 is a block diagram showing the functional configuration of the information presentation device 200 included in the information presentation system 10 according to the present embodiment. Specifically, Fig. 2 shows the configuration of the information presentation device 200, and information exchange between the information presentation device 200 and the power storage facility 100 and the client device 300.

[0036] 2, the information presentation device 200 has an information acquisition unit 210, an information transmission unit 220, and a storage unit 230. Although not shown, in addition to the above configuration, the information presentation device 200 may also have an input unit such as a keyboard and a mouse, and a display unit such as a liquid crystal display.

[0037] The information acquisition unit 210 acquires the electric train line information 141 and the power storage information 142 from the communication unit 140 of the power storage equipment 100 via the communication network 400. The electric train line information 141 is information indicating an electrical state of the electric train line 4. The power storage information 142 is information indicating an electrical state of at least one of the first power storage device 120 and the second power storage device 130. In the present embodiment, the power storage information 142 is information indicating an electrical state of both the first power storage device 120 and the second power storage device 130. The information acquisition unit 210 writes and stores the acquired electric train line information 141 and power storage information 142 in the storage unit 230. The electric train line information 141 and the power storage information 142 will be specifically described below.

[0038] The electric train line information 141 is a collection of data including electric train line voltage information indicating the voltage of the electric train line 4 (overhead line voltage), electric train line current information indicating the current of the electric train line 4 (overhead line current), and first effective value current information indicating the effective value current between the electric train line 4 and the power conversion device 110. The effective value current is a current obtained when an intermittent current flow is replaced with a continuous flow. Details will be described later. In this way, the information acquisition unit 210 acquires information including voltage information indicating the voltage of the electric train line 4 (overhead line voltage information) as the electric train line information 141.

[0039] In this embodiment, the communication unit 140 acquires the electric train line information 141 from the power converter 110, not directly from the electric train line 4. That is, the information acquiring unit 210 acquires the electric train line information 141 from the power converter 110 via the communication unit 140. Specifically, the information acquiring unit 210 acquires the electric train line information 141 including electric train line voltage information and electric train line current information acquired from a voltmeter, a current sensor, etc. of the power converter 110, and first effective current information calculated from the electric train line current information. The calculation of the first effective current information may be performed by the power converter 110 or the information acquiring unit 210.

[0040] The power storage information 142 is a collection of data including power storage device voltage information indicating the voltage of at least one of the first power storage device 120 and the second power storage device 130, power storage device current information indicating the current, SOC information indicating the SOC, and second effective current information indicating the effective current. The power storage device voltage information may be information indicating the total voltage of the first power storage device 120 and the second power storage device 130, information indicating the individual voltages of the first power storage device 120 and the second power storage device 130, or information indicating the voltage of the first power storage device 120 or the second power storage device 130 that is being charged or discharged. The same applies to other information. In this way, the information acquisition unit 210 acquires information including SOC information indicating the SOC of at least one of the first power storage device 120 and the second power storage device 130 as the power storage information 142.

[0041] The information acquisition unit 210 acquires power storage information 142 from the first power storage device 120 and the second power storage device 130 or the power conversion device 110 via the communication unit 140. Specifically, the information acquisition unit 210 acquires information from management units (BMUs: Battery Management Units) (not shown) included in the first power storage device 120 and the second power storage device 130 or the power conversion device 110, and acquires the power storage information 142 by performing calculations as necessary.

[0042] The SOC information may be calculated by integrating current or correcting an OCV (Open Circuit Voltage) using the storage device voltage information and the storage device current information. The second effective value current information may be calculated using the storage device current information. This calculation may be performed by the management unit (BMU), the power conversion device 110, or the information acquisition unit 210. The information acquisition unit 210 acquires the information calculated by the management unit (BMU) from the management unit (BMU) via the communication unit 140, and acquires the information calculated by the power conversion device 110 from the power conversion device 110 via the communication unit 140.

[0043] Next, a specific description will be given of the effective current information (first effective current information, second effective current information) included in the electric train line information 141 and the power storage information 142 acquired by the information acquisition unit 210. Fig. 3 is a diagram for explaining the effective current information acquired by the information acquisition unit 210 according to this embodiment. Specifically, Fig. 3 is a diagram showing the second effective current information included in the power storage information 142.

[0044] 3, when a power storage device such as the first power storage device 120 or the second power storage device 130 is intermittently charged or discharged, short periods of charging and discharging and pauses are repeated periodically, and a charging current and a discharging current flow with a time interval. If this charging and discharging are considered to be performed continuously in one cycle (current flows continuously), the magnitude of the current in that one cycle (the sum of the charging current and the discharging current) is the effective current (second effective current information). The effective current (first effective current information) of the power conversion device 110 is the sum of the effective currents (second effective current information) of the first power storage device 120 and the second power storage device 130.

[0045] For example, if the effective current exceeds the allowable effective current, it may be necessary to reduce the output current due to overcurrent detection by the power conversion device 110, or the life of the first power storage device 120 or the second power storage device 130 may be affected (the life may end sooner than expected). For this reason, it is desirable to operate the power conversion device 110 so that the effective current falls within the allowable effective current. The information acquisition unit 210 acquires the effective current for the previous 30 minutes and the accumulated effective current for one day, etc. It is possible to check the presence or absence of a malfunction by determining whether the acquired effective current exceeds the allowable effective current. In this way, the effective current is specified as the performance (rating) of the power conversion device 110, the first power storage device 120, and the second power storage device 130.

[0046] Returning to FIG. 2 , the information transmission unit 220 transmits at least one of the first data 221 for displaying the electric train line information 141 and the power storage information 142 in association with a time axis, and the second data 222 for displaying a frequency distribution of the electric train line information 141, to the client device 300. Specifically, the information transmission unit 220 reads and acquires from the storage unit 230 the electric train line information 141 and the power storage information 142 acquired by the information acquisition unit 210 and stored in the storage unit 230. The information transmission unit 220 creates at least one of the first data 221 and the second data 222 using at least one of the electric train line information 141 and the power storage information 142, and writes and stores it in the storage unit 230. The information transmission unit 220 reads and acquires at least one of the first data 221 and the second data 222 stored in the storage unit 230 from the storage unit 230, and transmits it to the client device 300. In this embodiment, the information transmitting unit 220 creates both the first data 221 and the second data 222 and transmits them to the client device 300. The first data 221 and the second data 222 will be specifically described below.

[0047] Fig. 4 is a diagram showing an example of first data 221 transmitted by information transmission unit 220 according to the present embodiment to client device 300. Specifically, Fig. 4 is a diagram showing a state in which first data 221 is displayed on display unit 310 of client device 300. Fig. 5 is a diagram showing an example of second data 222 transmitted by information transmission unit 220 according to the present embodiment to client device 300. Specifically, Fig. 5 is a diagram showing a state in which second data 222 is displayed on display unit 310 of client device 300.

[0048] The first data 221 includes screen data on which the electric rail information 141 and the power storage information 142 are displayed in association with a time axis. Specifically, as shown in Fig. 4, the first data 221 includes data (screen data) for displaying the voltage information (electric rail voltage information) of the electric rail 4 included in the electric rail information 141 and the SOC information of the power storage device included in the power storage information 142 in association with a time axis. The first data 221 also includes data (screen data) for displaying the current information (power storage device current information) of the power storage device included in the power storage information 142 in association with a time axis. The first data 221 may include data (screen data) for displaying information other than the above, such as effective value current information (first effective value current information or second effective value current information) included in the electric rail information 141 or the power storage information 142. In Fig. 4, the first data 221 is screen data that displays each piece of information as a graph, but may be screen data that displays each piece of information as a numerical value.

[0049] In this way, the information transmission unit 220 creates screen data in which the electric train line information 141 and the power storage information 142 are displayed in association with the time axis as the first data 221, and transmits the created screen data to the client device 300. Specifically, the information transmission unit 220 transmits data for displaying the voltage information of the electric train line 4 included in the electric train line information 141 and the SOC information of the power storage device included in the power storage information 142 in association with the time axis as the first data 221 to the client device 300. The client device 300 displays the acquired screen data (screen data in which the voltage information of the electric train line 4 and the SOC information of the power storage device, etc. are associated with the time axis) on the display unit 310.

[0050] The second data 222 includes a histogram indicating a frequency distribution of values ​​of the electric rail information 141. Specifically, as shown in Fig. 5, the second data 222 includes data (screen data) for displaying a frequency distribution of voltage values ​​indicated by voltage information (electric rail voltage information) of the electric rail 4 included in the electric rail information 141. The second data 222 may include data (screen data) for displaying a frequency distribution of information other than the above, such as current information (electric rail current information) of the electric rail 4 included in the electric rail information 141. In Fig. 5, the second data 222 is screen data that displays information as a histogram (graph), but may also be screen data that displays information as numerical values.

[0051] In this way, the information transmitting unit 220 creates a histogram indicating the frequency distribution of values ​​of the electric train line information 141 as the second data 222, and transmits the created histogram to the client device 300. Specifically, the information transmitting unit 220 transmits data for displaying the frequency distribution of voltage values ​​indicated by the voltage information of the electric train line 4 included in the electric train line information 141 as the second data 222 to the client device 300. The client device 300 displays the acquired screen data (a histogram indicating the frequency distribution of voltage values ​​of the electric train line 4) on the display unit 310.

[0052] Returning to Fig. 2, the storage unit 230 is a memory that stores data acquired (created) by the information acquisition unit 210 and the information transmission unit 220, etc. Specifically, the storage unit 230 stores the electric train line information 141, the power storage information 142, the first data 221, and the second data 222, etc. The storage unit 230 may store data other than the above, such as data in the middle of calculating the first data 221 and the second data 222. When any change is made to any of these data in the storage unit 230, the data may be updated each time, or the data may be accumulated.

[0053] [3. Description of Processing Flow of Information Presentation Device 200] Next, a description will be given of a process performed by the information display device 200 (an information display method in which the information display device 200 displays information to the client device 300). Specifically, Fig. 6 is a flowchart showing a process (information display method) performed by the information display device 200 according to the present embodiment.

[0054] As shown in FIG. 6, first, the communication unit 140 of the power storage equipment 100 acquires electric train line information 141 and power storage information 142 from the power conversion device 110 and at least one of the first power storage device 120 and the second power storage device 130 (S102).

[0055] The information acquisition unit 210 of the information presentation device 200 acquires, from the communication unit 140, electric train line information 141 indicating an electrical state of the electric train line 4, and power storage information 142 indicating an electrical state of at least one of the first power storage device 120 and the second power storage device 130 (S104). Specifically, the information acquisition unit 210 acquires, as the electric train line information 141, information including voltage information (electric train line voltage information) indicating the voltage of the electric train line 4. The information acquisition unit 210 acquires the electric train line information 141 from the power conversion device 110 via the communication unit 140. The information acquisition unit 210 acquires, as the power storage information 142, information including SOC information indicating the SOC of at least one of the first power storage device 120 and the second power storage device 130, and the like.

[0056] The information transmission unit 220 of the information presentation device 200 creates at least one of first data 221 for displaying the electric train line information 141 and the power storage information 142 in association with a time axis, and second data 222 for displaying a frequency distribution of the electric train line information 141 (S106). Specifically, the information transmission unit 220 creates screen data on which the electric train line information 141 and the power storage information 142 are displayed in association with a time axis, as the first data 221. More specifically, the information transmission unit 220 creates data for displaying the voltage information of the electric train line 4 included in the electric train line information 141 and the SOC information of the power storage device included in the power storage information 142 in association with a time axis, as the first data 221. In addition, the information transmission unit 220 creates a histogram showing a frequency distribution of values ​​of the electric train line information 141, as the second data 222. Specifically, the information transmitting unit 220 creates, as the second data 222, data for displaying a frequency distribution of voltage values ​​indicated by the voltage information of the electric rail 4 included in the electric rail information 141.

[0057] The information transmitting unit 220 transmits at least one of the created first data 221 and second data 222 to the client device 300 (S108). That is, the information transmitting unit 220 transmits the created screen data (graphs, histograms, etc.) to the client device 300.

[0058] The client device 300 displays at least one of the acquired first data 221 and second data 222 on the screen (S110). Specifically, the client device 300 displays the first data 221 and the second data 222 on the display unit 310 (see FIGS. 4 and 5). When the client device 300 acquires data other than a graph, such as numerical values, as the first data 221 and the second data 222, the client device 300 may display the numerical values ​​or other data on the display unit 310.

[0059] In this manner, the process (information presentation method) performed by the information presentation device 200 ends.

[0060] [4. Description of Effects] As described above, the information presentation device 200 according to the present embodiment transmits to the client device 300 at least one of the first data 221 for displaying the electric train line information 141 and the power storage information 142 in association with the time axis, and the second data 222 for displaying the frequency distribution of the electric train line information 141. In this manner, the information presentation device 200 transmits at least one of the first data 221 and the second data 222 to the client device 300, so that at least one of the first data 221 and the second data 222 can be viewed on the client device 300. If the first data 221 can be viewed on the client device 300, the electrical states of the electric train line 4 and the power storage device (at least one of the first power storage device 120 and the second power storage device 130; the same applies below) over time can be grasped. Therefore, the electrical state of at least one of the electric train line 4 and the power storage device can be remotely monitored and information can be provided. If the second data 222 can be viewed on the client device 300, the frequency distribution of the electric train line information 141 can be grasped, and therefore the electrical status of at least one of the electric train line 4 and the power storage device can be remotely monitored and the information can be provided. This makes it possible to remotely monitor and provide the information on the electrical status of at least one of the electric train line 4 and the power storage device by the client device 300 away from the site, without the need to check the electrical status of the electric train line 4 and the power storage device on site, and makes it possible to manage the electrical status.

[0061] The information presentation device 200 creates screen data in which the electric train line information 141 and the power storage information 142 are associated with a time axis and transmits the screen data to the client device 300, whereby the screen data can be viewed on the client device 300. By viewing this screen data, the electrical states of the electric train line 4 and the power storage device over time can be easily grasped, and the electrical state of at least one of the electric train line 4 and the power storage device can be easily remotely monitored and information can be provided. This makes it possible to easily manage the electrical state of at least one of the electric train line 4 and the power storage device by remotely monitoring and providing information on the electrical state of the electric train line 4 and the power storage device from the client device 300 away from the site.

[0062] The information presentation device 200 acquires voltage information of the electric train line 4 and SOC information of the power storage device, and transmits first data 221 for displaying the voltage information and SOC information in association with a time axis to the client device 300, thereby allowing the first data 221 to be viewed on the client device 300. If the first data 221 can be viewed on the client device 300, it is possible to grasp the voltage of the electric train line 4 and the SOC of the power storage device over time, and therefore it is possible to remotely monitor and provide information according to changes in the voltage of the electric train line 4 and the SOC of the power storage device. This point will be described in detail below.

[0063] From an operational standpoint, it is preferable to have the power storage device absorb the surplus regenerative power at the performance upper limit of the power conversion device 110 and the power storage device, and to discharge the absorbed surplus regenerative power to the train line 4 (to make the most effective use of the surplus regenerative power as power for powering the train 3). It is also preferable not to perform charging or discharging to adjust the SOC of the power storage device (to complete the energy balance by absorbing the surplus regenerative power and powering the train 3). However, due to various factors such as the characteristics of the line, the time of day, and the season, there are cases where it is not possible to achieve an ideal operating state. For this reason, by viewing the first data 221 on the client device 300, the following measures can be taken.

[0064] When the balance of the charge and discharge amounts of the power storage device in a certain time period is biased toward the discharge side, the SOC of the power storage device tends to be low. When the SOC of the power storage device is low, it becomes necessary to limit the discharge current of the power storage device, and the voltage of the electric rail 4 cannot be effectively increased or the power burden on the substation 2 increases, which may reduce the energy saving effect. Fig. 7A is a diagram showing an example of first data 221a when the SOC of the power storage device according to this embodiment is low. As shown in Fig. 7A, when the SOC of the power storage device is low, the discharge current of the power storage device is limited at B1 in the current information of the power storage device, and the voltage of the electric rail 4 cannot be effectively increased at A1 in the voltage information of the electric rail 4 (the voltage drop is large).

[0065] Therefore, during a time period when the SOC of the power storage device tends to be low, the system contributes to suppressing a decrease in the SOC of the power storage device by providing information for lowering the discharge start voltage of the electric train line 4 to make it difficult for the power storage device to be discharged, or for lowering the charge start voltage of the electric train line 4 to make it easier for the power storage device to be charged, thereby making it possible to remotely monitor and provide information from the client device 300 located away from the site, without the need to check the electrical state of at least one of the electric train line 4 and the power storage device on-site, and thus enabling management.

[0066] When the balance between the charge and discharge amounts of the power storage device during a certain time period is biased toward the charging side, the SOC of the power storage device tends to be high. When the SOC of the power storage device is high, it becomes necessary to limit the charging current of the power storage device, and there is a risk that the voltage of the electric rail 4 cannot be effectively reduced, regeneration lapse may occur more easily, or the amount of surplus regenerative power absorbed may decrease, resulting in a decrease in the energy saving effect. FIG. 7B is a diagram showing an example of first data 221b when the SOC of the power storage device according to this embodiment is high. As shown in FIG. 7B, when the SOC of the power storage device is high, the charging current of the power storage device is limited at B2 in the current information of the power storage device, and the voltage of the electric rail 4 cannot be effectively reduced at A2 in the voltage information of the electric rail 4 (the voltage rise is large).

[0067] Therefore, during times when the SOC of the power storage device tends to be high, an increase in the SOC of the power storage device is suppressed by increasing the charging start voltage of the electric train line 4 to make it more difficult for the power storage device to be charged, or by increasing the discharging start voltage of the electric train line 4 to make it easier for the power storage device to be discharged. This makes it possible to remotely monitor and provide information on the electrical status of at least one of the electric train line 4 and the power storage device by the client device 300 located away from the site, and to manage the electrical status.

[0068] The information presentation device 200 creates a histogram showing the frequency distribution of the values ​​of the electric train line information 141 and transmits the histogram to the client device 300, whereby the histogram can be viewed on the client device 300. By viewing this histogram, the electrical state of the electric train line 4 can be easily understood, and therefore the electrical state of at least one of the electric train line 4 and the power storage device can be easily remotely monitored and information can be provided. This makes it possible to easily manage the electrical state of at least one of the electric train line 4 and the power storage device by remotely monitoring and providing information on the electrical state of the electric train line 4 and the power storage device from the client device 300 away from the site.

[0069] The information presentation device 200 acquires voltage information on the electric train line 4 and transmits to the client device 300 second data 222 for displaying the frequency distribution of the voltage values ​​of the electric train line 4, whereby the second data 222 can be viewed on the client device 300. If the second data 222 can be viewed on the client device 300, the frequency distribution of the voltage values ​​of the electric train line 4 can be grasped, and therefore remote monitoring and information provision can be made according to the frequency distribution of the voltage values ​​of the electric train line 4. This point will be described in detail below.

[0070] FIG. 8 is a diagram showing an example of the second data 222a in the case where the frequency distribution of the voltage value of the electric rail 4 according to the present embodiment varies. As shown in FIG. 8, when the frequency distribution of the voltage value of the electric rail 4 varies, the balance of charging and discharging of the power storage device is poor, which causes a decrease in the operation rate of the power storage device. For this reason, it is preferable that the frequency of the voltage value of the electric rail 4 is well balanced and falls within a certain range. For example, in order to balance the charging and discharging of the power storage device, it is preferable to set the discharge start voltage C2 and the charge start voltage C3 so that the area (total number of times) to the left of the discharge start voltage C2 is the same as the area (total number of times) to the right of the charge start voltage C3. In order to increase the operation rate of the power storage device, it is preferable to narrow the interval between the discharge start voltage C2 and the charge start voltage C3, the interval between the maximum discharge start voltage C1 and the discharge start voltage C2, and the interval between the charge start voltage C3 and the maximum charge start voltage C4.

[0071] In this way, by viewing the second data 222 on the client device 300 and grasping the frequency distribution of the voltage value of the electric rail 4, and then providing information for adjusting the charging start voltage, discharging start voltage, and SOC of the power storage device, etc., it is possible to contribute to control so that the frequency of the voltage value of the electric rail 4 falls within a certain range in a balanced manner. As a result, it is not necessary to check the electrical state of at least one of the electric rail 4 and the power storage device on-site, and remote monitoring and information can be provided by the client device 300 located away from the site, making it possible to easily manage. In this way, if the frequency of the voltage value of the electric rail 4 falls within a certain range in a balanced manner, the effective value current tends to increase, so if the effective value current is set so that it is operated near the upper limit of the allowable effective value current, the operating rate of the power storage device will be high. However, when the life of the power storage device is important, it is preferable to control so that the effective value current does not become too large (the operating rate of the power storage device is not made too high).

[0072] The information presentation device 200 acquires the train line information 141 from a power conversion device 110 such as a converter installed between the train line 4 and the power storage device, and therefore does not need to acquire the train line information 141 directly from the train line 4. This allows the information presentation device 200 to easily acquire the train line information 141, making it possible to easily manage the electrical state of at least one of the train line 4 and the power storage device.

[0073] [5. Explanation of Variations] Although the information presentation device 200 according to the present embodiment has been described above, the present invention is not limited to the above embodiment. The embodiment disclosed herein is illustrative and not restrictive in all respects, and the scope of the present invention includes all modifications within the meaning and scope of the claims.

[0074] In the above embodiment, the power storage facility 100 has two power storage devices, the first power storage device 120 and the second power storage device 130, but may have only one power storage device, or may have three or more power storage devices. The power conversion device 110 of the power storage facility 100 is a DC / DC converter that performs conversion between DC powers, but may be an AC / DC converter that converts AC power to DC power, or an inverter (DC / AC inverter) that converts DC power to AC power. The power storage facility 100 does not need to have the power conversion device 110.

[0075] In the above embodiment, the information transmitting unit 220 of the information presentation device 200 creates both the first data 221 and the second data 222, and transmits both the first data 221 and the second data 222 to the client device 300. However, the information transmitting unit 220 may create both the first data 221 and the second data 222, but transmit only one of the first data 221 and the second data 222 to the client device 300. The information transmitting unit 220 may create only one of the first data 221 and the second data 222, and transmit the one to the client device 300.

[0076] In the above embodiment, the information presentation device 200 has the storage unit 230. However, the information presentation device 200 may not have the storage unit 230 and may store information in an external recording medium and acquire information from the recording medium.

[0077] The present invention can be realized not only as the information presentation device 200, the information presentation system 10, and the information presentation method, but also as a program for causing a computer to execute the processing included in the information presentation method. That is, each component included in the information presentation device 200 may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded in a recording medium such as a hard disk or a semiconductor memory. The present invention can also be realized as a computer-readable non-transitory recording medium on which the program is recorded, such as a flexible disk, a hard disk, a CD-ROM, an MO, a DVD, a DVD-ROM, a DVD-RAM, a BD (Blu-ray (registered trademark) Disc), or a semiconductor memory. The program can be distributed via the recording medium and a transmission medium such as the Internet. The present invention can also be realized as an integrated circuit having a processing unit included in the information presentation device. That is, each functional block of the information presentation device 200 shown in FIG. 2 may be realized as an LSI (Large Scale Integration) which is an integrated circuit. These may be individually integrated into one chip, or may be integrated into one chip so as to include some or all of them. In this way, the information presentation device 200 may be realized by each component being configured with dedicated hardware, or by executing a software program suitable for each component.

[0078] Any combination of the components in the above-described embodiments and their modifications is also included within the scope of the present invention. [Industrial Applicability]

[0079] The present invention can be applied to an information display device or the like that enables management of the electrical state of at least one of an electric train line and an electrical storage device. [Explanation of symbols]

[0080] 1. Train System 2. Substation 3. Train 4. Train Lines 5 Stations 6. Power Plant 10 Information presentation system 100 Energy storage facilities 110 Power conversion device 120 First power storage device 130 Second power storage device 140 Communication Unit 141 Train Line Information 142 Power storage information 200 Information presentation device 210 Information Acquisition Department 220 Information Transmission Department 221, 221a, 221b First Data 222, 222a Second Data 230 Storage section 300 Client Device 310 Display section 400 Communication Network

Claims

1. An information presentation device is connected to a communication unit electrically connected to an electric train line that supplies power to a train and to a power storage device electrically connected to the electric train line, and to a client device via a communication network, and presents information to the client device, an information acquisition unit that acquires, from the communication unit, electric train line information indicating an electrical state of the electric train line and power storage information indicating an electrical state of the power storage device; an information transmission unit that transmits to the client device first data for displaying the electric train line information together with the power storage information in association with a time axis; The information transmission unit transmits to the client device the first data including information for lowering a discharge start voltage or a charge start voltage of the electric train line in a time period when an SOC (State Of Charge) of the power storage device tends to decrease, and for increasing a charge start voltage or a discharge start voltage of the electric train line in a time period when an SOC of the power storage device tends to increase. Information presentation device.

2. An information presentation device is connected to a communication unit electrically connected to an electric train line that supplies power to a train and to a power storage device electrically connected to the electric train line, and to a client device via a communication network, and presents information to the client device, an information acquisition unit that acquires, from the communication unit, electric train line information indicating an electrical state of the electric train line and power storage information indicating an electrical state of the power storage device; an information transmission unit that transmits to the client device both first data for displaying the electric power line information together with the power storage information in association with a time axis, and second data for displaying a frequency distribution of the electric power line information, The information transmission unit transmits to the client device both the first data including information for lowering a discharge start voltage or a charge start voltage of the electric train line in a time period when an SOC (State Of Charge) of the power storage device tends to decrease, and for increasing a charge start voltage or a discharge start voltage of the electric train line in a time period when an SOC of the power storage device tends to increase, and the second data including information for keeping a frequency of voltage values ​​of the electric train line within a certain range. Information presentation device.

3. The information transmission unit creates a histogram indicating a frequency distribution of values ​​of the electric train line information as the second data, and transmits the created histogram to the client device. The information presentation device according to claim 2 .

4. the information acquisition unit acquires, as the electric rail information, information including voltage information indicating a voltage of the electric rail; The information transmission unit transmits data for displaying a frequency distribution of the voltage values ​​indicated by the voltage information to the client device as the second data.

4. The information display device according to claim 2 or 3.

5. The information transmission unit creates screen data, as the first data, on which the electric train line information is displayed in association with a time axis together with the power storage information, and transmits the created screen data to the client device. The information presentation device according to any one of claims 1 to 4.

6. the information acquisition unit acquires, as the electric train line information, information including voltage information indicating a voltage of the electric train line, and acquires, as the power storage information, information including SOC information indicating a State Of Charge (SOC) of the power storage device; The information transmission unit transmits, to the client device, data for displaying the voltage information together with the SOC information in association with a time axis as the first data. The information presentation device according to any one of claims 1 to 5.

7. The information acquisition unit acquires the electric train line information from a power conversion device disposed between the electric train line and the power storage device via the communication unit. The information presentation device according to any one of claims 1 to 6.

8. An information presentation device according to any one of claims 1 to 7; The power storage device; The communication unit; An information presentation system comprising:

9. An information presentation method in which an information presentation device connected to a communication unit electrically connected to an electric train line that supplies power to a train and to a power storage device electrically connected to the electric train line and a client device via a communication network presents information to the client device, the information presentation method comprising: the information presentation device acquires, from the communication unit, electric train line information indicating an electrical state of the electric train line and power storage information indicating an electrical state of the power storage device; The information presentation device transmits to the client device first data for displaying the electric train line information together with the power storage information in association with a time axis, the first data including information for lowering a discharge start voltage or a charge start voltage of the electric train line in a time period when the SOC (State Of Charge) of the power storage device tends to be low, and for increasing a charge start voltage or a discharge start voltage of the electric train line in a time period when the SOC of the power storage device tends to be high. Information presentation method.

10. An information presentation method in which an information presentation device connected to a communication unit electrically connected to an electric train line that supplies power to a train and to a power storage device electrically connected to the electric train line and a client device via a communication network presents information to the client device, the information presentation method comprising: the information presentation device acquires, from the communication unit, electric train line information indicating an electrical state of the electric train line and power storage information indicating an electrical state of the power storage device; The information presentation device transmits to the client device first data for displaying the electric train line information together with the power storage information in correspondence with a time axis, the first data including information for lowering a discharge start voltage or a charge start voltage of the electric train line in a time period when the SOC (State Of Charge) of the power storage device tends to be low and for increasing a charge start voltage or a discharge start voltage of the electric train line in a time period when the SOC of the power storage device tends to be high, and second data for displaying a frequency distribution of the electric train line information, the second data including information for keeping the frequency of voltage values ​​of the electric train line within a certain range. Information presentation method.

11. A program for causing a computer to execute the processes included in the information presentation method according to claim 9 or 10.

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