Patent Publication Number: US-2022234453-A1

Title: Power supply control device, power supply control program, and power supply control system

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Japanese Patent Application No. 2021-009012 filed on Jan. 22, 2021, incorporated herein by reference in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a power supply control device, a power supply control program, and a power supply control system. 
     2. Description of Related Art 
     Japanese Unexamined Patent Application Publication No. 2019-008339 (JP 2019-008339 A) discloses that a power supply facility is controlled such that, in the event of a disaster, an emergency vehicle can preferentially use the power supply facility among vehicles capable of traveling in a hybrid traveling mode or an electric vehicle (EV) traveling mode. 
     SUMMARY 
     A plurality of traveling lanes in which a vehicle travels in the same direction, each of the traveling lanes having a different lane width, may be installed. It is assumed that emergency vehicles or public vehicles such as large vehicles for transportation travel in a wide traveling lane of the traveling lanes, for example. These public vehicles are required to travel while charging a battery and move to a disaster area even in the event of a disaster. 
     The present disclosure has been made in view of the above, and an object of the present disclosure is to provide a power supply control device, a power supply control program, and a power supply control system capable of maintaining a state in which a public vehicle can travel in the event of a disaster or the like. 
     A power supply control device according to the present disclosure includes a processor that generates control information for preferentially supplying electric power to a wide traveling lane when information on a disaster is acquired in a plurality of traveling lanes in which a vehicle travels in the same direction, each of the traveling lanes having a different width. 
     A power supply control program according to the present disclosure causes a processor to execute generating control information for preferentially supplying electric power to a wide traveling lane when information on a disaster is acquired in a plurality of traveling lanes in which a vehicle travels in the same direction, each of the traveling lanes having a different width. 
     Further, a power supply control system according to the present disclosure includes a plurality of traveling lanes in which a vehicle travels in the same direction, each of the traveling lanes having a different width, and a power supply control device including a first processor that generates control information for preferentially supplying electric power to a wide traveling lane when information on a disaster is acquired. 
     According to the present disclosure, it is possible to maintain a state in which public vehicles can travel. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Features, advantages, and technical and industrial significance of exemplary embodiments of the disclosure will be described below with reference to the accompanying drawings, in which like signs denote like elements, and wherein: 
         FIG. 1  is a schematic view showing a power supply control system according to an embodiment; 
         FIG. 2  is a block diagram illustrating a configuration of a vehicle (vehicle control device) according to the embodiment; 
         FIG. 3  is a diagram showing an example of the vehicle and traveling lanes in the power supply control system according to the embodiment; 
         FIG. 4  is a sequence diagram illustrating a power supply control process executed by the power supply control system according to the embodiment; 
         FIG. 5  is a schematic view showing a power supply control system according to a modification; and 
         FIG. 6  is a sequence diagram illustrating a disaster determination process executed by the power supply control system according to the modification. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     Hereinafter, an embodiment of the present disclosure will be described below with reference to the drawings. In all the drawings of the following embodiment, the same or corresponding portions are designated by the same reference signs. Further, the present disclosure is not limited to the embodiment described below. 
     Embodiment 
     First, a power supply control system according to an embodiment will be described.  FIG. 1  is a schematic view showing the power supply control system including a power supply management device according to the embodiment.  FIG. 2  is a block diagram illustrating a configuration of a vehicle (vehicle control device) according to the embodiment.  FIG. 3  is a diagram showing an example of the vehicle and traveling lanes in the power supply control system according to the embodiment. 
     As shown in  FIG. 1 , a power supply control system  1  according to the embodiment includes a traveling lane management device  20 , vehicles  30 , and a power supply management device  40 . In the power supply control system  1  according to the embodiment, the traveling lane management device  20 , each vehicle  30 , and the power supply management device  40  are connected to each other by a network  10  so as to be able to communicable with each other. The network  10  is composed of an Internet line network, a mobile phone line network, and the like by which the traveling lane management device  20 , the vehicle  30 , and the power supply management device  40  can communicate with each other. In the present embodiment, the vehicle  30  is assumed to be a vehicle capable of traveling in a hybrid traveling mode or an electric vehicle (EV) traveling mode. The vehicle  30  is charged with electric power supplied from a power supply device  41  managed by the power supply management device  40 . 
     The traveling lane management device  20  controls formation of the vehicles  30  traveling in the traveling lane, and transmits information for controlling a power supply mode in the traveling lane to the power supply management device  40 . The traveling lane management device  20  includes a control information creation unit  21 , a control unit  22 , and a storage unit  23 . The traveling lane management device  20  is configured using one or a plurality of computers including a central processing unit (CPU), a field programmable gate array (FPGA), a read only memory (ROM), a random access memory (RAM), and the like. The traveling lane management device  20  corresponds to a traveling control device. 
     The control information creation unit  21  creates traveling lane control information for controlling power supply in the traveling lane based on the received information related to a disaster. 
     The control unit  22  comprehensively controls an operation of each unit of the traveling lane management device  20 . 
     The storage unit  23  is configured using a computer-readable recording medium, and various programs and various data are stored in a writable and readable manner. The recording medium includes a storage medium such as an optical disk, a flash memory, and a magnetic disk, and a drive device for these storage media. 
     Further, the storage unit  23  stores power supply control information used when the control information creation unit  21  creates the control information. This power supply control information includes a power supply ratio assigned to each traveling lane in the normal state and in the event of a disaster. The term “normal” as used herein refers to a state in which traveling of the vehicle  30  is not hindered by an accident, disaster, or the like. The power supply ratio is, for example, a ratio of the electric power assigned with respect to the total electric power capable of being supplied to traveling lanes to be supplied with the electric power. In the normal state, the same ratio is set for each traveling lane, and in the event of a disaster, the ratio is set according to a width of a traveling lane. The power supply ratio in the event of a disaster is set such that electric power is preferentially supplied to a traveling lane as the size of the vehicle  30  that travels in the traveling lane is large. 
     In the present embodiment, non-contact charging is performed between the vehicle  30  and the power supply device  41 . A receiving unit  31  provided in the vehicle  30  communicates with the power supply device  41  connecting to the power supply management device  40  so as to transmit a power supply signal to the vehicle  30 . The receiving unit  31  and the power supply device  41  are each configured using, for example, a coil, a switching circuit, and a rectifying and smoothing circuit, and transmit and receive the power supply signal by a magnetic field resonance method. With this configuration, the vehicle  30  and the power supply device  41  communicate with each other in a non-contact state. The power supply device  41  preferably extends along the traveling lane in order to lengthen a power supply section. In the present embodiment, an example in which electric power is supplied and information is transmitted using electromagnetic waves will be described. However, a configuration in which electric power is supplied and information is transmitted using light may be adopted. Further, the receiving unit  31  may not accept an input of the power supply signal when the remaining charge of the battery of the vehicle  30  has reached the upper limit value. The remaining charge is, for example, a state of charge (SOC). 
     The power supply device  41  is provided in a plurality of lanes (traveling lanes) in which the vehicle travels, and is electrically connected to the power supply management device  40 . Further, in the present embodiment, the power supply device  41  may have a detection function that detects the vehicle  30  located on the power supply device  41  and a reception function that receives information on the vehicle  30 . The detection function and the reception function are configured using, for example, a loop antenna. For example, the detection function transmits a detection signal to the power supply management device  40  when the vehicle  30  is detected. Note that, when the vehicle can be detected by a power supply coil or the like, the coil may be used for detection in common with power supply. 
     Subsequently, the configuration of the vehicle  30  will be described with reference to  FIG. 2 . The vehicle  30  includes a receiving unit  31 , a communication unit  32 , a global positioning system (GPS) unit  33 , an input and output unit  34 , and an electronic control unit (ECU)  35 . Further, the vehicle  30  is provided with a battery  36  that supplies electric power to each portion. The battery  36  is configured to be rechargeable. In the present embodiment, a vehicle control device  300  is configured by the communication unit  32 , the GPS unit  33 , the input and output unit  34 , and the ECU  35 . The vehicle control device  300  is configured using one or a plurality of computers, etc. including a CPU, FPGA, ROM, RAM, and the like. 
     The receiving unit  31  receives the power supply signal from the power supply device  41 . The receiving unit  31  may be configured to acquire energy from the power supply device  41  such as light, or may transmit its own information to the power supply device  41  using the electromagnetic wave. The receiving unit, the acquiring unit, and the transmitting unit may be provided separately instead of being integrated. The power supply signal received by the receiving unit  31  is supplied to the battery  36  as electric power. 
     The communication unit  32  communicates with the traveling lane management device  20  by wireless communication via the network  10 . The communication unit  32  receives driving support information for supporting driving of the vehicle  30  from the traveling lane management device  20 . The driving support information includes road traffic information such as regulations and traffic jams. Further, the communication unit  32  may be configured to transmit its own information to the power supply management device  40 . 
     The GPS unit  33  receives radio waves from GPS satellites and detects the position of the vehicle  30 . The detected position is output to the outside (traveling lane management device  20 ) or stored in the storage unit as the position information of the vehicle  30 . 
     The input and output unit  34  is composed of a touch panel display, a speaker, a microphone, etc. The input and output unit  34  is configured to be able to input and output predetermined information such as information related to driving support by displaying characters, figures, etc. on the screen of the touch panel display or outputting sound from the speaker in accordance with the control by the ECU  35 . Further, the input and output unit  34  is configured to be able to input predetermined information to the ECU  35  when a user of the vehicle  30  or the like operates the touch panel display or outputs a voice toward the microphone. 
     The ECU  35  is composed of an information processing device such as a microcomputer including a CPU, FPGA, ROM, RAM, and the like. The ECU  35  comprehensively controls the electrical operation of each portion of the vehicle  30 . The ECU  35  is configured to perform calculation using input data and data and a program stored in advance, and output the calculation result as a control command signal. 
     Note that, the vehicle  30  includes storage media such as a hard disk and a semiconductor memory, a storage unit including a drive device for these storage media, a sensor for detecting an object approaching the vehicle  30 , and the like. The storage unit stores programs of an operating system (OS) and various applications necessary for the ECU  35  to comprehensively control the operation of each portion of the vehicle  30 . 
     Further, the vehicle  30  is provided with a control mechanism and an operation mechanism for driving the vehicle  30 . Specifically, the vehicle  30  includes a powertrain and drive wheels as a drive mechanism. The powertrain includes a power source that generates a driving force and outputs the generated driving force from an output shaft, and a power transmission mechanism that transmits the driving force output by the power source to the drive wheels. Further, the operation mechanism is composed of a shift lever, an accelerator pedal, and the like. 
     The power supply management device  40  is connected to the power supply device  41 , receives information acquired from each vehicle  30  by the power supply device  41 , and controls power supply to the vehicle  30  based on the received information. The power supply management device  40  is configured using one or a plurality of computers, etc. including a CPU, FPGA, ROM, RAM, and the like. 
     Further, the power supply management device  40  includes a control unit  40   a . The control unit  40   a  comprehensively controls an operation of each unit of the power supply management device  40 . The control unit  40   a  controls power supply to the power supply device  41  installed in each traveling lane based on the control information acquired from the traveling lane management device  20 . 
     Here, in the present embodiment, a road  50  including traveling lanes in which the vehicle  30  travels in the same direction will be described as an example. The road  50  includes a first traveling lane  51 , a second traveling lane  52 , and a third traveling lane  53 , and the widths of the traveling lanes are different from each other. The width described here refers to a length in a traveling direction of the vehicle  30  and in a direction orthogonal to a longitudinal direction of the traveling lane. Specifically, the first traveling lane  51 , the second traveling lane  52 , and the third traveling lane  53  are arranged in numerical order from left to right, and the width of the lane increases in the order of the first traveling lane  51 , the second traveling lane  52 , and the third traveling lane  53 . The relationship of the widths shown in  FIG. 3  is an example, and the width of the lane is set according to the scale of the road  50  and the vehicle  30  that travels in the lane. In the normal state, the vehicle  30  travels in each traveling lane, regardless of vehicle types. The vehicle types are broadly classified into emergency vehicles and other vehicles. The emergency increases as the public nature of medical care, transportation of goods, etc. increases. Further, a small size, a medium size, a large size, etc. of the vehicle  30  are classified in accordance with the weight of the vehicle  30  (including the loadable weight). In the present embodiment, emergency vehicles are classified as large vehicles. In  FIG. 3 , for example, a large-sized vehicle  30  is  30 L, a medium-sized vehicle  30  is  30 M, and a small-sized vehicle  30  is  30 S. 
     A plurality of the power supply devices  41  is provided at preset intervals in each traveling lane. The power supply devices  41  are provided, for example, at intervals of several kilometers (km). Although  FIG. 3  shows an example in which an installation area of the power supply device  41  is smaller (shorter) than the vehicle  30 , the installation area can be made longer than the vehicle  30  or the power supply devices  41  are disposed adjacent to each other and the power supply range can be adjusted. 
     Subsequently, a traveling control process executed by the power supply control system  1  will be described with reference to  FIG. 4 .  FIG. 4  is a sequence diagram illustrating a traveling control process executed by the power supply control system according to the embodiment. 
     First, the control unit  22  of the traveling lane management device  20  determines whether information related to a disaster (hereinafter referred to as disaster information) is received (step S 101 ). The disaster information is distributed, for example, from disaster prevention centers of national and local governments. When the control unit  22  determines that the disaster information has not been received (step S 101 : No), the control unit  22  repeats the reception confirmation. On the other hand, when the control unit  22  determines that the disaster information has been received (step S 101 : Yes), the control unit  22  proceeds to step S 102 . Before the disaster information is acquired, the power supply control (power supply ratio) in the traveling lane is assumed to be in the normal state. That is, the power supply ratio in each traveling lane is equalized. 
     In step S 102 , the control information creation unit  21  creates traveling lane control information including the power supply ratio in the travel lane of the disaster area based on the received disaster information. The power supply ratio set here is set such that electric power supplied to the widest traveling lane (for example, the third traveling lane in  FIG. 3 ) is maximized. Here, in the example shown in  FIG. 3 , for example, the power supply ratio may be set such that the power supply ratio is increased in the order of the first traveling lane  51 , the second traveling lane  52 , and the third traveling lane  53 , or the power supply ratio of the third traveling lane  53  is the largest and the power supply ratios of the first traveling lane  51  and the second traveling lane  52  are the same. 
     The control unit  22  transmits the traveling lane control information created in step S 102  to the power supply management device  40  (step S 103 ). At this time, the traveling lane control information is transmitted to the power supply management device  40  that manages the power supply device  41  in the disaster area. 
     The power supply management device  40  determines whether the traveling lane control information has been received (step S 104 ). When the control unit  40   a  determines that the traveling lane control information has not been received (step S 104 : No), the control unit  40   a  repeats the reception confirmation of the traveling lane control information. On the other hand, when the control unit  40   a  determines that the traveling lane control information has been received (step S 104 : Yes), the control unit  40   a  proceeds to step S 105 . 
     In step S 105 , the control unit  40   a  changes the power supply control in each traveling lane in accordance with the traveling lane control information. The control unit  40   a  controls the ratio of electric power supplied to each traveling lane according to the power supply ratio. As a result, the electric power is preferentially supplied to the third traveling lane  53  that has a largest lane width. At this time, the electric power may not be supplied to an affected traveling lane in which the vehicle  30  does not travel. 
     With the control of step S 105 , for example, when an emergency vehicle  30  (vehicle  30 L) travels in the widest traveling lane (third traveling lane  53  in  FIG. 3 ) to head for the disaster area, the emergency vehicle  30  can travel under stable power supply. 
     After that, the control unit  22  determines whether resolution information indicating that the disaster has been settled and trouble caused by the disaster has been resolved has been received (step S 106 ). When the control unit  22  determines that the resolution information has not been received (step S 106 : No), the control unit  22  repeats the reception confirmation. On the other hand, when the control unit  22  determines that the resolution information has been received (step S 106 : Yes), the control unit  22  proceeds to step S 107 . 
     In step S 107 , the control unit  22  resets the power supply ratio such that the power supply ratio in each traveling lane is equalized, and transmits, to the power supply management device  40 , cancellation information including the set power supply ratio. 
     The control unit  40   a  determines whether the cancellation information has been received (step S 108 ). When the control unit  40   a  determines that the cancellation information has not been received (step S 108 : No), the control unit  40   a  repeats the reception confirmation. On the other hand, when the control unit  40   a  determines that the cancellation information has been received (step S 108 : Yes), the control unit  40   a  proceeds to step S 109 . 
     In step S 109 , the control unit  40   a  returns the power supply ratio to the power supply device  41  in each traveling lane to the normal ratio (here, the power supply ratios are equalized). 
     In the present embodiment described above, the traveling lane management device  20  controls such that electric power is preferentially supplied to the widest traveling lane when a disaster occurs in a normal state in which electric power is equally supplied to each of the traveling lanes having a different lane width. According to the present embodiment, in the event of a disaster, when the emergency vehicle  30  travels in the widest traveling lane to head for the disaster area or the like, the emergency vehicle  30  can travel under stable power supply. As a result, it is possible to maintain a state in which public vehicles can travel in the event of a disaster or the like. 
     In the present embodiment, an example in which the vehicle  30  travels by manual driving according to operation of a driver has been described. However, this can be applied to a case in which the vehicle  30  travels by autonomous driving while the traveling lane in which each vehicle  30  travels and the speed at which the vehicle  30  travels are controlled by the traveling lane management device  20 . 
     Modification 
       FIG. 5  is a schematic view showing a power supply control system according to a modification. A power supply control system lA according to the modification includes a power supply management device  40 A instead of the power supply management device  40 , and further includes a disaster area identification device  60 , for the configuration of the power supply control system  1  according to the embodiment. Hereinafter, parts different from the embodiment (the power supply management device  40 A, the disaster area identification device  60 , and contents of processes) will be described. In the modification, the power supply management device  40 A receives information on SOC associated with time from the communication unit  32  of the vehicle  30 . 
     The power supply management device  40 A is connected to the power supply device  41 , and the power supply device  41  receives information such as SOC from each vehicle  30  and controls power supply to the vehicle  30 . The power supply management device  40 A is configured using one or a plurality of computers, etc. including a CPU, FPGA, ROM, RAM, and the like. The power supply device  41  outputs the acquired transmission information to the power supply management device  40 A. 
     Further, the power supply management device  40 A includes a power supply efficiency calculation unit  40   b  and a control unit  40   c.    
     The power supply efficiency calculation unit  40   b  calculates a power supply rate (power supply efficiency) per unit time based on the SOC acquired from the vehicle  30  to which electric power is supplied. The power supply efficiency calculation unit  40   b  can adopt a known method for calculating the power supply efficiency. 
     The control unit  40   c  comprehensively controls an operation of each unit of the power supply management device  40 A. 
     The disaster area identification device  60  receives information on the power supply efficiency of each vehicle  30  from the power supply management device  40 A, determines whether a disaster has occurred at a power supply point based on the received information, and identifies a disaster area. Further, the disaster area identification device  60  transmits disaster information to, for example, a regional center that administers a point in which the disaster area is identified. 
     The disaster area identification device  60  includes a disaster determination unit  61 , a control unit  62 , and a storage unit  63 . The disaster area identification device  60  is configured using one or a plurality of computers, etc. including a CPU, FPGA, ROM, RAM, and the like. 
     The disaster determination unit  61  determines whether a disaster has occurred in an area managed by the power supply management device  40 A based on the power supply efficiency acquired from the power supply management device  40 A. 
     Here, when sediments are deposited on a traveling lane and the sediments are interposed between the vehicle  30  and the power supply device  41 , strength of the electromagnetic wave (transmission efficiency) is lowered, so that the power supply efficiency is lowered due to reduction of the strength. Examples of the sediments include liquids such as water, ice (snow), earth and sand, volcanic ash, and collapsed structures. At this time, a plurality of threshold values may be set according to a degree of decrease in the power supply efficiency, and a degree of disaster may be determined based on each threshold value. When the rate of decrease in the power supply efficiency is different depending on types of sediments, a threshold value may be set for each sediment type. When a threshold value is set according to a sediment type, the disaster determination unit  61  compares the power supply efficiency with each threshold value to determine a category of disaster (for example, flood). 
     The control unit  62  comprehensively controls an operation of each unit of the disaster area identification device  60 . 
     The storage unit  63  is configured using a computer-readable recording medium, and various programs and various data are stored in a writable and readable manner. The recording medium includes a storage medium such as an optical disk, a flash memory, and a magnetic disk, and a drive device for these storage media. 
     Further, the storage unit  63  stores a threshold value used when the disaster determination unit  61  determines whether a disaster occurs. The threshold value is, for example, a lower limit value of the power supply efficiency set based on the rate of decrease in the power supply efficiency caused by the sediment. A plurality of the threshold values may be set such that a threshold value is set for each model of the power supply device  41  or a threshold value is set based on the rate of decrease in power supply efficiency caused by the type of sediment. In addition, the strength of the electromagnetic wave may be increased depending on the type of sediment and the like. When it is assumed that the power supply efficiency is abnormally increased due to such a sediment, an upper limit value may be set for the threshold value, and the disaster determination unit  61  may determine that a disaster has occurred when the threshold value exceeds the upper limit value. 
     Subsequently, a disaster determination process in the disaster area identification device  60  will be described.  FIG. 6  is a sequence diagram illustrating a disaster determination process executed by the power supply control system according to the modification. In  FIG. 6 , as an example, an example of determining flood damage will be described. 
     The power supply management device  40 A supplies electric power to the power supply device  41  that has detected the vehicle  30  to perform the power supply process from the power supply device  41  to the vehicle  30  (step S 201 ). The power supply management device  40 A acquires the SOC at the start of power supply and the time at which the power supply is started, for example, via the power supply device  41 . When the power supply management device  40 A ends the power supply process, the power supply management device  40 A acquires the SOC at the end of power supply and the time at which the power supply is ended, for example, via the power supply device  41 . The SOC at the start of power supply and the SOC at end of the power supply may be collectively transmitted to the power supply management device  40 A. At this time, when the SOC reaches the upper limit value during power supply, the charging end time is time when the SOC reaches the upper limit value. 
     After that, the power supply efficiency calculation unit  40   b  calculates the power supply efficiency (step S 202 ). For example, the power supply efficiency calculation unit  40   b  acquires, from the vehicle  30  to which electric power is supplied, the SOC at the time immediately before power supply is started and the SOC at the time immediately after power supply is ended. The power supply efficiency calculation unit  40   b  calculates the power supply rate per unit time (the rate of increase in the SOC) based on each time and SOC that have been acquired, and the obtained rate is set as the power supply efficiency. 
     The power supply management device  40 A transmits power supply information including the calculated power supply efficiency to the disaster area identification device  60  (step S 203 ). In addition to the power supply efficiency, the power supply information includes information regarding a position of the power supply device  41  for which the power supply efficiency is calculated. 
     The disaster area identification device  60  determines whether the power supply information has been received (step S 204 ). When the disaster area identification device  60  determines that the power supply information has not been received (step S 204 : No), the disaster area identification device  60  repeats the reception confirmation of the power supply information. When the disaster area identification device  60  determines that the power supply information has been received (step S 204 : Yes), the disaster area identification device  60  proceeds to step S 205 . 
     In step S 205 , the disaster area identification device  60  determines whether flood damage has occurred based on the power supply efficiency. Specifically, the disaster determination unit  61  determines whether flood damage has occurred in a point managed by the power supply management device  40 A based on the power supply efficiency acquired from the power supply management device  40 A. Further, the disaster determination unit  61  estimates a flooded area based on the position (point) of the power supply device  41  to be determined. 
     Specifically, the disaster determination unit  61  compares the power supply efficiency with the threshold value stored in the storage unit  63 , and when the power supply efficiency is less than the threshold value, the disaster determination unit  61  determines that a disaster has occurred in the point in which the power supply device  41  to which electric power is supplied is disposed or in an area including the point. Further, the disaster determination unit  61  estimates a disaster area based on a determination result for each power supply device  41 . For example, an area is associated with each point in which the power supply device  41  is disposed. When the disaster determination unit  61  determines that a disaster has occurred and a plurality of the power supply devices  41  is disposed in areas where a disaster has occurred, the disaster determination unit  61  sets a disaster area by combining the areas in which the power supply devices  41  are disposed. The disaster area is identified by a determination result of the disaster determination unit  61 . 
     Further, the disaster determination unit  61  may determine whether a disaster has occurred based on the number of the power supply devices  41  having power supply efficiency being lower than the threshold value and continuity. For example, when the disaster determination unit  61  determines that a disaster has occurred regarding the predetermined number or more of the power supply devices  41  among all the power supply devices  41  managed by the power supply management device  40 , the disaster determination unit  61  determines that a disaster has occurred in an area managed by the power supply management device  40 . Further, when the disaster determination unit  61  determines that a disaster has occurred and the number (continuous number) of the power supply devices  41  disposed adjacent to each other is a predetermined number or more, the disaster determination unit  61  determines that a disaster has occurred in an area managed by the power supply management device  40 . “Disposed adjacent to each other” described here means that the power supply devices  41  are disposed adjacent to each other in the same traveling lane or each of the power supply devices  41  is disposed in a traveling lane among a plurality of the traveling lanes and the power supply devices  41  are disposed adjacent to each other at a closest distance. 
     The disaster area identification device  60  generates flood damage information based on a determination result of the disaster determination unit  61  (step S 206 ). The disaster area identification device  60  generates, as the flood damage information, information including a flooded area determined by the disaster determination unit  61 . When a degree of flood damage is determined by the set threshold value, that information is also included in the flood damage information. 
     The disaster area identification device  60  distributes the flood damage information to the traveling lane management device  20 , the regional center that manages a flooded area, and the like (step S 207 ). When the regional center receives the flood damage information, the regional center distributes the information to a subregional center that manages the region, notifies that a flood has occurred by disaster prevention broadcasting, sets a no-traffic area, and stops an operation of the power supply device  41  in the region. 
     The traveling lane management device  20  performs power supply control in the same manner as in the embodiment for an area where flood damage has occurred (see  FIG. 4 ). Specifically, control in which electric power is preferentially supplied to the widest traveling lane is implemented. At this time, when the vehicle  30  cannot travel because the widest traveling lane is submerged, the electric power is preferentially supplied to the second widest traveling lane. The electric power to be supplied to the submerged traveling lane may be reduced or the electric power may not be supplied (stopped) to the submerged traveling lane. 
     In the modification described above, as in the embodiment, the traveling lane management device  20  controls such that electric power is preferentially supplied to the widest traveling lane when a disaster occurs in a normal state in which electric power is equally supplied to each of the traveling lanes having a different width. According to the modification, in the event of a disaster, when the emergency vehicle  30  travels in the widest traveling lane to head for the disaster area or the like, the emergency vehicle  30  can travel under stable power supply. As a result, it is possible to maintain a state in which public vehicles can travel in the event of a disaster or the like. 
     Further, in the modification, it is determined whether a disaster has occurred using the power supply efficiency of non-contact charging that changes depending on presence or absence of sediments interposed between the vehicle  30  and the power supply device  41 . According to the modification, by acquiring information from the power supply device  41  that supplies electric power to the vehicle  30 , it is possible to estimate whether a disaster has occurred in a location where the power supply device  41  is installed, so that a disaster area can be identified without installing new equipment. This allows a local personnel to identify the occurrence of a disaster without going to a disaster area. Further, as described above, the rate of decrease in the power supply efficiency caused by the sediment may be different depending on the type of sediment. When the difference in the rate of decrease in the power supply efficiency can be used, it is possible to determine a category of disaster such as flood damage or sediment-related disaster and send the disaster information to the relevant region. 
     Further, in the modification, since a traveling lane affected by a disaster can be identified by installing each power supply device  41 , the electric power to be supplied to other traveling lanes can be appropriately allocated and the electric power can be efficiently supplied by reducing or stopping the electric power to be supplied to the affected traveling lane. Further, since the number of vehicles  30  traveling in the affected traveling lane is extremely reduced, the electric power to be wastefully consumed can be reduced by reducing or stopping the electric power to be supplied to the affected traveling lane. 
     Further, in the modification, the disaster determination unit  61  determines whether a disaster has occurred based on the number of the power supply devices  41  having power supply efficiency being lower than the threshold value and continuity, so that the disaster determination unit  61  can distinguish failure of the power supply device  41  and the occurrence of a disaster to determine whether a disaster has occurred. This allows the disaster determination unit  61  to determine whether a disaster has occurred more accurately. 
     In the modification, the power supply management device  40 A may be configured not to include the power supply efficiency calculation unit  40   b , and the disaster area identification device  60  may acquire the information on SOC from the vehicle  30  and the disaster determination unit  61  may calculate the power supply efficiency. 
     Recoding Medium 
     According to the embodiment, a program capable of executing a processing method by the power supply control system can be recorded in the recording medium that is readable by a computer or other machines or devices (hereinafter referred to as “computer or the like”). The computer or the like functions as the control units of devices of a disaster specification system as the computer or the like is caused to read the program stored in the recording medium and execute the program. Here, the recording medium that is readable by the computer or the like means a non-transitory recording medium that can accumulate information such as data or programs through electrical, magnetic, optical, mechanical, or chemical action and read the information from the computer or the like. Examples of the recording medium removable from the computer among the recording media above include, for example, a flexible disk, a magneto-optical disk, a compact disc read-only memory (CD-ROM), a compact disc rewritable (CD-R/W), a digital versatile disc (DVD), a Blu-ray disc (BD), a digital audio tape (DAT), a magnetic tape, and a memory card such as a flash memory. In addition, examples of the recording medium fixed to the computer include a hard disk and a read-only memory (ROM). Further, a solid state drive (SSD) can be used as the recording medium removable from the computer or as the recording medium fixed to the computer. 
     Other Embodiment 
     In the power supply control system according to the embodiment, the “unit” can be read as a “circuit” or the like. For example, the communication unit can be read as a communication circuit. 
     The program to be executed by the power supply control system according to the embodiment may be configured to be stored in a computer connected to a network such as the Internet and provided through downloading via the network. 
     Further effects and modifications can be easily derived by those skilled in the art. The broader aspects of the present disclosure are not limited to the particular details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and their equivalents.