JP2020022231A - Power reception device determining system, power reception device determining method, and power reception device determining apparatus - Google Patents

Abstract

To reduce an information communication amount between adjacent node devices in a power network.SOLUTION: A power reception device determining system (100) determines, from among a plurality of power reception devices (E), one power reception device (E) to which power is transmitted from a power generation device (G). In the power reception device determining system (100), a plurality of node devices (N) each represents the power generation device (G), a power reception device (E), or a power router device (R). The node devices (N) each acquires, from an adjacent node device, second information which is held by the adjacent node device, updates first information on the basis of the second information, and determines, from among the adjacent node devices, one node device to which power is transmitted on the basis of the first information. Each of the first information and the second information includes information indicating a power demand from the power reception device and/or information indicating the distance between the node device and the power reception device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power receiving device determining system, a power receiving device determining method, and a power receiving device determining device.

  Until now, power generation has been mainly performed at power plants of power companies, and power generated by the power companies has been supplied to consumers. However, in recent years, people other than power companies have begun to sell power generated by sunlight, wind power, or the like to power companies.

  For this reason, there is a demand for a system that can receive power from a power source according to the situation. In order to meet such a demand, a power packet system for delivering a power packet has been known (Patent Document 1). In the power packet system of Patent Literature 1, power information is delivered with power packets with header information added thereto, and power is supplied and received between consumers.

JP 2011-142771 A

  In the power packet system described in Patent Literature 1, a power packet is delivered based on route information in a header portion. However, Patent Literature 1 does not describe how to generate route information in order to efficiently deliver a power packet in a power network. For this reason, in the power packet system of Patent Document 1, it has been difficult to efficiently transmit power in a power network.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a power receiving device determining system, a power receiving device determining method, and a power receiving device determining device for efficiently transmitting power with a small amount of information communication. It is in.

  A power receiving device determination system according to the present invention determines one power receiving device to which a power generation device transmits power from among a plurality of power receiving devices. The power receiving device determination system includes a plurality of node devices. Each of the plurality of node devices indicates one of the power generation device and the plurality of power receiving devices, or a power router device, and the power router device includes one of the adjacent plurality of node devices. Receiving power from one node device and transmitting power to another one of the adjacent plurality of node devices, wherein each of the plurality of node devices is connected to an adjacent node device via a transmission line, Each of the plurality of node devices is communicably connected to the adjacent node device, and each of the plurality of node devices includes a storage unit that stores first information, and a storage unit that stores first information from the adjacent node device. An acquisition unit that acquires the second information held by the device; and, based on the second information, one node device that transmits the power is determined from the adjacent node devices. And tough, based on the second information, and a update unit configured to update the first information. Each of the first information and the second information includes at least one of information indicating power demand of the power receiving device and information indicating a distance between the node device and the power receiving device.

  In one embodiment, each of the first information and the second information includes potential gradient information, the potential gradient information indicates a potential gradient, and the potential gradient indicates a power demand of the power receiving device by the node. The quotient divided by the distance between the device and the power receiving device is shown.

  In one embodiment, when the acquisition unit has acquired a plurality of pieces of the second information from a plurality of adjacent node devices, the updating unit determines, from among the plurality of pieces of the second information, the one having the largest potential gradient. Two pieces of second information are selected, and the first information is updated based on the one piece of second information.

  In one embodiment, each of the first information and the second information includes power transmission path information, and the updating unit performs the power transmission path information of the first information based on the power transmission path information of the second information. To update.

  In one embodiment, the power transmission path information includes node identification information, and the node identification information indicates a node device that configures the power transmission path.

  In one embodiment, the power generation device transmits a power pulse to the one power receiving device.

  In one embodiment, the time axis is divided into equally-spaced synchronization frames, the synchronization frame is time-synchronized throughout the power receiving device determination system, the synchronization frame is divided into a plurality of power slots, and the power generation device And transmitting the power pulse to the one power receiving device using one of the plurality of power slots.

  In one embodiment, each of the first information and the second information includes power slot information, and the power slot information indicates whether each of the plurality of power slots is used for transmitting the power pulse. And the updating unit updates the power slot information of the first information based on the power slot information of the second information.

  The power receiving device determination method according to the present invention determines one power receiving device to which a power generation device transmits power from among a plurality of power receiving devices. The power receiving device determination system includes a plurality of node devices, each of the plurality of node devices indicates one of the power generation device and the plurality of power receiving devices, or a power router device, the power The router device receives power from one of the plurality of adjacent node devices, transmits power to another one of the adjacent plurality of node devices, and transmits the power to the other one of the plurality of node devices. Each is connected to an adjacent node device via a transmission line, each of the plurality of node devices is communicably connected to the adjacent node device, and each of the plurality of node devices stores first information. The power receiving device determination method includes a storage unit, wherein each of the plurality of node devices acquires second information held by the adjacent node device from the adjacent node device. An obtaining step, an updating step of updating the first information based on the second information, and determining one node device transmitting the power from the adjacent node devices based on the first information. Determining step, wherein each of the first information and the second information includes at least one of information indicating a power demand of the power receiving device and information indicating a distance between the node device and the power receiving device. Including.

  The power receiving device determination device according to the present invention configures a power receiving device determination system that determines one power receiving device to which a power generation device transmits power from among a plurality of power receiving devices. The power receiving device determination system includes a plurality of node devices, each of the plurality of node devices indicates one of the power generation device and the plurality of power receiving devices, or a power router device, the power The router device receives power from one of the plurality of adjacent node devices, transmits power to another one of the adjacent plurality of node devices, and transmits the power to the other one of the plurality of node devices. Each is connected to an adjacent node device by a transmission line, each of the plurality of node devices is communicably connected to the adjacent node device, and each of the plurality of node devices is configured to be the power receiving device determining device. The power receiving device determining device includes: a storage unit that stores first information; and an acquiring unit that acquires second information held by the adjacent node device from the adjacent node device. A determining unit that determines one node device that transmits the power from the adjacent node devices based on the second information, and an updating unit that updates the first information based on the second information. And Each of the first information and the second information includes at least one of information indicating power demand of the power receiving device and information indicating a distance between the node device and the power receiving device.

  According to the present invention, power can be transmitted efficiently with a small amount of information communication.

It is a schematic diagram of a power receiving device determination system of the present embodiment. It is a schematic diagram of a node device in the power receiving device determination system of the present embodiment. (A) is a schematic diagram of a power router device in the power receiving device determination system of the present embodiment, (b) is a schematic diagram of a power generation device in the power receiving device determination system of the present embodiment, and (c) is a schematic diagram of the present embodiment. It is a schematic diagram of the power receiving device in the power receiving device determination system of FIG. (A)-(c) is a schematic diagram for demonstrating the power receiving device determination method in the power receiving device determination system of this embodiment. (A)-(c) is a schematic diagram for demonstrating the power receiving device determination method in the power receiving device determination system of this embodiment. (A) And (b) is a schematic diagram for demonstrating a potential gradient. (A)-(c) is a schematic diagram for demonstrating the power receiving device determination method in the power receiving device determination system of this embodiment. It is a schematic diagram of the power transmission part of the power router device in the power receiving device determination system of the present embodiment. (A) is a schematic diagram showing power pulses in a plurality of synchronization frames in the power receiving device determination system of the present embodiment, and (b) is a diagram showing a plurality of power pulses in a synchronization frame in the power receiving device determination system of the present embodiment. FIG. It is a schematic diagram of a power receiving device determination system of the present embodiment. 11 is a table for explaining a power transmission destination determining method in a node device N1 of the power receiving device determination system illustrated in FIG. 10. FIG. 11 is a schematic diagram for explaining a method of determining a power slot that can be used in a power transmission path of a node device N1 in the power receiving device determination system illustrated in FIG. 11 is a table showing an initial state in the power receiving device determination system shown in FIG. 10 and first information stored in a storage unit of each node device after a first period. 11 is a table showing first information stored in a storage unit of each node device after a second period and a third period in the power receiving device determination system shown in FIG. 10.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated.

  First, a power receiving device determination system 100 according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic diagram of a power receiving device determination system 100.

  The power receiving device determination system 100 includes a plurality of node devices N. In the power receiving device determination system 100, power is transmitted and / or received between adjacent node devices N. A power network is configured by the plurality of node devices N.

  Each of the node devices N is connected to at least one other node device N. Each of the plurality of node devices N is connected to an adjacent node device N by a transmission line. The node device N transmits power to the adjacent node device N. In addition, each of the plurality of node devices N functions as a power receiving device determining device for determining a power receiving device that transmits power from the power generating device.

  Each of the plurality of node devices N is connected to an adjacent node device N so that information can be communicated. The communication between the adjacent node devices N may be performed via a wire or may be performed wirelessly. Typically, before the node device N transmits power, the node device N communicates information and determines a power transmission destination based on the information.

  In FIG. 1, in order to avoid excessively complicated description, the node device N is adjacent to one or two adjacent node devices N, and the plurality of node devices N are branched in a straight line. Connected without. However, as described later with reference to FIGS. 10 to 14, the plurality of node devices N may not necessarily be connected in a straight line. For example, at least one node device N of the power receiving device determination system 100 may be adjacent to three or more different node devices N.

  The node device N is the power generating device G, the power receiving device E, or the power router device R. Typically, the plurality of node devices N in the power receiving device determination system 100 include a power generating device G, a power receiving device E, and a power router device R. The power receiving device determination system 100 includes a plurality of power receiving devices E. In the power receiving device determination system 100, one power receiving device to which the power generation device G transmits power for at least a certain period is determined from the plurality of power receiving devices E.

  The power generation device G has a power generation function. The power receiving device E has a power demand. Typically, the power receiving device E receives power and consumes the received power. For example, the power receiving device E may be provided in a factory or in a general home. Typically, the power receiving device E includes a secondary battery (battery) that stores electric power. However, in order to avoid excessively complicated description, the power receiving device E includes a secondary battery (battery) unless otherwise specified. A description of the battery will be omitted.

  The power router device R receives power from a certain node device N and transmits the power to the node device N. Specifically, the power router device R receives power from one of the adjacent plurality of node devices N, and supplies the power to the other one of the adjacent plurality of node devices N. Power.

  The power generation device G, the power reception device E, and / or the power router device R may change with time. For example, a certain node device N functions as a power receiving device E having a power demand at a certain time, functions as a power generating device G having a power generating function at another time, and functions as a power router device R at another time. May work.

  In the power receiving device determination system 100 illustrated in FIG. 1, the power receiving device E includes a power receiving device E1 and a power receiving device E2. Further, the power router device R includes a power router device R1 and a power router device R2.

  The power receiving device determination system 100 illustrated in FIG. 1 includes five node devices N. The five node devices N are a power generating device G, a power receiving device E1, a power receiving device E2, a power router device R1, and a power router device R2. The power receiving device E1 is connected to the power router device R1. The power generation device G is connected to the power router device R1 and the power router device R2, and the power receiving device E2 is connected to the power router device R2. Here, the power receiving device E1, the power router device R1, the power generating device G, the power router device R2, and the power receiving device E2 are connected in a line in this order.

  The power generation device G has a power generation function. The power receiving device E1 and the power receiving device E2 have a power demand. The power router device R1 receives the power from the power generation device G and transmits the power to the power receiving device E1. The power router device R2 receives the power from the power generation device G and transmits the power to the power receiving device E2.

  For example, when the power demand of the power receiving device E2 is zero, the power of the power generating device G is transmitted to the power receiving device E1 via the power router device R1. Alternatively, when the power demand of the power receiving device E1 is zero, the power of the power generating device G is transmitted to the power receiving device E2 via the power router device R2. One of the power receiving device E1 and the power receiving device E2 receives power unless the other power demands. The power receiving device determination system 100 determines to which of the power receiving device E1 and the power receiving device E2 the power of the power generating device G should be transmitted even when each of the power receiving device E1 and the power receiving device E2 has a power demand.

  The node device N determines a power transmission destination before receiving power and / or transmitting power. The node device N communicates information with an adjacent node device N and determines a power transmission destination.

  Next, the node device N in the power receiving device determination system 100 of the present embodiment will be described with reference to FIG. FIG. 2 is a schematic diagram of the node device N in the power receiving device determination system 100.

  The node device N includes a storage unit Na, an acquisition unit Nb, a determination unit Nc, and an update unit Nd. The storage unit Na stores the first information. The first information is used to determine a power transmission destination.

  The acquiring unit Nb acquires, as second information, information held by the adjacent node device N from the adjacent node device N. The determining unit Nc determines one node device N that transmits power from the adjacent node devices N based on the second information. The update unit Nd updates the first information of the storage unit Na based on the second information.

  For example, the first information and the second information are the same type of information. The update unit Nd may update the first information of the storage unit Na based on the same type of second information acquired from the adjacent node device N. Alternatively, the update unit Nd may generate new first information based on the second information, and update the information in the storage unit Na with the newly generated first information. Each of the first information and the second information includes at least one of information indicating power demand of the power receiving device E corresponding to the node device N and information indicating a distance between the node device N and the power receiving device E.

  Further, each of the first information and the second information may include power transmission path information. In this case, the storage unit Na stores the power transmission path information as the first information. The update unit Nd updates the power transmission path information of the first information based on the power transmission path information of the second information. The power transmission path information includes node identification information, and the node identification information indicates a node device that forms the power transmission path.

  Here, each node device N in the power receiving device determination system 100 will be specifically described with reference to FIG. First, the power router device R will be described with reference to FIG. FIG. 3A is a schematic diagram of the power router device R in the power receiving device determination system 100 of the present embodiment.

  The power router device R includes a storage unit Ra, an acquisition unit Rb, a determination unit Rc, an update unit Rd, and a power transmission unit Re. The storage unit Ra, the acquisition unit Rb, the determination unit Rc, and the update unit Rd operate similarly to the storage unit Na, the acquisition unit Nb, the determination unit Nc, and the update unit Nd described above with reference to FIG. The power transmission unit Re receives power from another node device N and transmits power to another node device N.

  Next, the power generation device G will be described with reference to FIG. FIG. 3B is a schematic diagram of the power generation device G in the power receiving device determination system 100 of the present embodiment.

  The power generation device G includes a storage unit Ga, an acquisition unit Gb, a determination unit Gc, an update unit Gd, and a power generation unit Ge. The storage unit Ga, the acquisition unit Gb, the determination unit Gc, and the update unit Gd operate similarly to the storage unit Na, the acquisition unit Nb, the determination unit Nc, and the update unit Nd described above with reference to FIG. The power generation unit Ge has a power generation function.

  Next, the power receiving device E will be described with reference to FIG. FIG. 3C is a schematic diagram of the power receiving device E in the power receiving device determination system 100 of the present embodiment.

  The power receiving device E includes a storage unit Ea, an obtaining unit Eb, a determining unit Ec, an updating unit Ed, and a power receiving unit Ee. The storage unit Ea, the acquisition unit Eb, the determination unit Ec, and the update unit Ed operate in the same manner as the storage unit Na, the acquisition unit Nb, the update unit Nd, and the determination unit Nc described above with reference to FIG. The power receiving unit Ee has a power demand.

  The power receiving device determination system 100 determines a power receiving device E to transmit power based on power demand and / or a power transmission distance. For example, the power receiving device determination system 100 may determine the power receiving device E that transmits power based on the power demand of the power receiving device E.

  Here, with reference to FIG. 4, a power receiving device determination method for determining a power receiving device to transmit power in the power receiving device determination system 100 will be described. FIGS. 4A to 4C are schematic diagrams for describing a power receiving device determination method in the power receiving device determination system 100 of the present embodiment. 4A to 4C, the storage units Ga, Ea, Ra and the acquisition unit Gb of the power generation device G, the power reception device E, and the power router device R are used to avoid excessive drawings. , Eb, and Rb are shown.

  The storage unit Na of each node device N stores, as first information, information indicating the power demand of the power receiving device E that has received the information and the node device N of the power transmission destination. Here, the description will be made before the initial state in which the node device N acquires the information indicating the power demand of the node device N itself as the first information.

  First, as shown in FIG. 4A, in the initial state, the node device N acquires the power demand of the node device N itself. The power receiving device E1 and the power receiving device E2 have a power demand. Here, the power demand of the power receiving device E1 is -50, and the power demand of the power receiving device E2 is -100. Therefore, the storage unit Ea of the power receiving device E1 stores information indicating that the power demand of the power receiving device E1 is −50. The storage unit Ea of the power receiving device E2 stores information indicating that the power demand of the power receiving device E2 is -100. Here, when there is a power demand for the power receiving device E, the power demand is represented by-(minus). The power receiving device E has a power demand, but when the power can be sufficiently received, the power demand becomes + (plus). When the power demand is + (plus), the power receiving device E may charge the secondary battery (battery) with power.

  On the other hand, the power demands of the power router device R1 and the power router device R2 are zero. For this reason, the storage unit Ra of the power router device R1 stores information indicating that the power demand is 0. The storage unit Ra of the power router device R2 stores information indicating that the power demand is 0. Similarly, the power demand of the power generator G is zero. For this reason, the storage unit Ga of the power generation device G stores information indicating that the power demand is 0.

  In the initial state, the node device N stores information indicating the power receiving device E that has received the information as the power transmission destination. The power receiving device E1 and the power receiving device E2 store information indicating the power receiving device E1 and the power receiving device E2 themselves as the power receiving device E that has received the information. In addition, each of the power router device R1, the power generation device G, and the power router device R2 stores that there is no power receiving device E that has received the information.

  Thereafter, as shown in FIG. 4B, in the first period, each node device N acquires information held by the adjacent node device N from the adjacent node device N as second information.

  For example, the power router device R1 acquires, from the power receiving device E1, information indicating that the power demand of the power receiving device E1 is -50 as the second information. After that, the power router device R1 stores the first information as first information of the storage unit Ra so as to store information indicating that the power demand of the power receiving device E1 is -50 and the power transmission destination is the power receiving device E1. Update. As described above, the information from the power receiving device E1 is stored in the storage unit Ra of the power router device R1. Strictly speaking, the power router device R1 acquires, from the power generation device G, information indicating that the power demand is 0, as the second information, but the storage unit Ra of the power router device R1 stores the power generation device G Is not stored.

  In addition, the power router device R2 acquires, as the second information, information indicating that the power demand of the power receiving device E2 is −100 from the power receiving device E2. After that, the power router device R2 stores the first information as first information in the storage unit Ra so as to store information indicating that the power demand of the power receiving device E2 is -100 and the power transmission destination is the power receiving device E2. Update. Thus, information from the power receiving device E2 is stored in the storage unit Ra of the power router device R2. Strictly speaking, the power router device R2 acquires, as the second information, information indicating that the power demand is 0 from the power generation device G. However, the storage unit Ra of the power router device R2 stores the power generation device G Is not stored.

  Strictly, the power receiving device E1 acquires information indicating that the power demand is 0 from the power router device R1. However, the power receiving device E1 stores in advance information indicating that the power receiving device E1 itself is a power receiving device. For this reason, the storage unit Ea of the power receiving device E1 is not updated with the information from the power router device R1. Similarly, the power receiving device E2 acquires information indicating that the power demand is 0 from the power router device R2. However, the power receiving device E2 stores in advance information indicating that the power receiving device E2 itself is a power receiving device. For this reason, the storage unit Ea of the power receiving device E2 is not updated with the information from the power router device R2.

  Further, the power generation device G acquires information indicating that the power demand is 0 from the power router device R1 and the power router device R2. Therefore, even after the end of the first period, the first information stored in the storage unit Ga of the power generation device G indicates that the power demand is zero.

  As shown in FIG. 4C, in the second period, each node device N acquires information held by the adjacent node device N from the adjacent node device N as second information.

  For example, the power generation device G acquires, as the second information, information indicating that the power demand of the power receiving device E1 is −50 from the power router device R1. In addition, the power generation device G acquires, as the second information, information indicating that the power demand of the power receiving device E2 is −100 from the power router device R2. Here, the power generation device G determines the power transmission destination according to the magnitude of the power demand. Since the power demand acquired from the power router device R1 is -50 and the power demand indicated from the power router device R2 is -100, the power generation device G obtains information indicating the power demand of the power receiving device E2. It is determined that power is to be transmitted to the router device R2. Thereafter, the power generation device G stores the first information as first information of the storage unit Ga so as to store information indicating that the power demand of the power reception device E2 is -100 and the power transmission destination is the power router device R2. Update.

  In addition, the power receiving device E1 acquires information indicating that the power demand of the power receiving device E1 is −50 from the power router device R1. In this case, in the power receiving device E1, the storage unit Ea of the power receiving device E1 does not update the first information because the power receiving device indicated by the second information includes the power receiving device E1 itself. Similarly, the power receiving device E2 acquires, from the power router device R2, information indicating that the power demand of the power receiving device E2 is -100. In this case, since the power receiving device indicated by the second information includes the power receiving device E2 itself, the storage unit Ea of the power receiving device E2 does not update the first information.

  Further, even in the second period, the power router device R1 acquires, from the power receiving device E1, information indicating that the power demand of the power receiving device E1 is −50 as the second information. In addition, the power router device R1 acquires, as the second information, information indicating that the power demand is 0 from the power generation device G. In this case, the power router device R1 keeps storing information indicating that the power demand of the power receiving device E1 is -50 and the power transmission destination is the power receiving device E1.

  Similarly, the power router device R2 acquires, from the power receiving device E2, information indicating that the power demand of the power receiving device E2 is -100 as the second information. In addition, the power router device R2 acquires information indicating that the power demand is 0 from the power generation device G as the second information. In this case, the power router device R2 keeps storing information indicating that the power demand of the power receiving device E2 is -100 and the power transmission destination is the power receiving device E2.

  Although not shown in FIG. 4, in the third period, each node device N transmits information held by the adjacent node device N from the adjacent node device N in the same manner as in the first period and the second period. It may be obtained as two pieces of information. The upper limit of the period is determined according to the number of the node devices N in the power receiving device determination system 100. Typically, the upper limit of the period is determined based on the number of node devices N from the node device N located at one end of the plurality of node devices N to the node device N located at the other end. Is done. Alternatively, the upper limit of the period may be determined by adding a surplus value to the number of node devices N from the node device N located at one end to the node device N located at the other end.

  After determining the power receiving device, the power from the power generating device G is transmitted to the power receiving device E. As described above, when it is determined that the power of the power generation device G is transmitted to the power reception device E2, the power of the power generation device G is transmitted to the power reception device E2 via the power router device R2.

  Note that, temporarily, after the power of the power generation device G is transmitted to the power reception device E2 via the power router device R2, the power demand of the power reception device E2 does not change while the power demand of the power reception device E1 remains at −50. Assume that the value has changed from -100 to -20. In this case, in the second period, the power generation device G acquires, as the second information, information indicating that the power demand of the power receiving device E1 is −50 from the power router device R1. In addition, the power generation device G acquires, as the second information, information indicating that the power demand is -20 from the power router device R2.

  Therefore, the power generation device G determines to transmit power to the power router device R1. After that, the power generation device G stores the first information of the storage unit Ga such that information indicating that the power demand of the power reception device E1 is −50 and that the power transmission destination is the power router device R1 is stored. 1 Update the information. Also in this case, after the power receiving device E1 is determined, the power of the power generating device G is transmitted to the power receiving device E1 via the power router device R1.

  According to the power receiving device determination system 100 of the present embodiment, each node device N can determine a power receiving device to be a power transmission target by updating its own information based on information from an adjacent node device N. Therefore, power can be transmitted efficiently with a small amount of information communication. In the power receiving device determination system 100 illustrated in FIG. 4, the power receiving device to be transmitted is determined according to the magnitude of the power demand.

  In the above description with reference to FIG. 4, the power receiving device determination system 100 determines the power transmission destination according to the power demand of the power receiving device E, but the present embodiment is not limited to this. The power receiving device determination system 100 may determine the power receiving device E to be the power transmission target based on the distance between each node device and the power receiving device E.

  Next, a power receiving device determination method for determining a power receiving device that receives power in the power receiving device determination system 100 will be described with reference to FIG. FIGS. 5A to 5C are schematic diagrams for describing a power receiving device determination method in the power receiving device determination system 100 of the present embodiment. Here, the power demands of the power receiving device E1 and the power receiving device E2 may be equal or different.

  The storage unit Na of each node device N stores, as the first information, information indicating the power receiving device E that has received the information and the distance from the node device N to the power receiving device E that has received the information.

  The distance between the power receiving device E1 and the power router device R1 is L, and the distance between the power router device R1 and the power generating device G is L. Further, the distance between the power generation device G and the power router device R2 is 2L, and the distance between the power router device R2 and the power receiving device E2 is 2L. For example, the storage unit Ra of the power router device R1 stores information indicating a distance L between the power router device R1 and the power receiving device E1. The storage unit Ra of the power router device R2 stores information indicating a distance 2L between the power router device R2 and the power receiving device E2. Further, the storage unit Ga of the power generation device G stores information indicating a distance L between the power generation device G and the power router device R1, and stores information indicating a distance 2L between the power generation device G and the power router device R2. Remember. Here, the description will be made before the initial state in which each node device N acquires, as the first information, information indicating the distance to the power receiving device E that has received the information.

  First, as illustrated in FIG. 5A, in the initial state, the node device N acquires the power receiving device E that has received the information and the distance to the power receiving device E that has received the information. The power receiving device E1 and the power receiving device E2 have a power demand. For this reason, the storage unit Ea of the power receiving device E1 stores information indicating that the power receiving device E1 is the power receiving device and the distance is 0. The storage unit Ea of the power receiving device E2 stores information indicating that the power receiving device E2 is a power receiving device and the distance is 0.

  On the other hand, the power demands of the power router device R1 and the power router device R2 are zero. Therefore, the storage unit Ra of the power router device R1 stores that there is no power receiving device E that has received the information. The storage unit Ra of the power router device R2 stores that there is no power receiving device E that has received the information. Similarly, the power demand of the power generator G is zero. Therefore, the storage unit Ga of the power generation device G stores that there is no power reception device E that has received the information.

  Thereafter, as shown in FIG. 5B, in the first period, each node device N acquires information held by the adjacent node device N from the adjacent node device N as second information.

  For example, the power router device R1 acquires, as the second information, information indicating that the power receiving device E1 is the power receiving device from the power receiving device E1 and that the distance from the power receiving device E1 to the power receiving device is 0. Thereafter, the power router device R1 stores, as the first information in the storage unit Ra, information indicating that the power receiving device E1 is the power receiving device and that the distance between the power router device R1 and the power receiving device E1 is L. The first information is updated so as to store. Strictly, the power router device R1 acquires, from the power generation device G, information indicating that there is no power receiving device that has received the information as the second information. No information from device G is stored.

  In addition, the power router device R2 acquires, as the second information, information indicating that the power receiving device E2 is a power receiving device from the power receiving device E2, and that the distance from the power receiving device E2 to the power receiving device is 0. Thereafter, the power router device R2 stores, as the first information of the storage unit Ra, information indicating that the power receiving device E2 is a power receiving device and that the distance between the power router device R2 and the power receiving device E2 is 2L. The first information is updated as follows. Strictly speaking, the power router device R2 obtains, from the power generation device G, information indicating that there is no power receiving device that has received the information, but the power generation device G stores the power generation device in the storage unit Ra of the power router device R2. No information from device G is stored.

  Strictly, the power receiving device E1 acquires information indicating that the power demand is 0 from the power router device R1. However, the power receiving device E1 stores in advance information indicating that the power receiving device E1 itself is a power receiving device. For this reason, the storage unit Ea of the power receiving device E1 is not updated with the information from the power router device R1. Similarly, the power receiving device E2 acquires information indicating that the power demand is 0 from the power router device R2. However, the power receiving device E2 stores in advance information indicating that the power receiving device E2 itself is a power receiving device. For this reason, the storage unit Ea of the power receiving device E2 is not updated with the information from the power router device R2.

  In addition, the power generation device G acquires information indicating that there is no power receiving device that has received the information from the power router device R1 and the power router device R2. For this reason, even after the end of the first period, the first information stored in the storage unit Ga of the power generation device G indicates that there is no power receiving device that has received the information.

  As illustrated in FIG. 5C, in the second period, each node device N acquires information held by the adjacent node device N from the adjacent node device N as second information.

  For example, the power generation device G acquires, as the second information, from the power router device R1, that the power receiving device E1 is the power receiving device and that the distance from the power router device R1 to the power receiving device E1 is L. Similarly, the power generation device G acquires, from the power router device R2, that the power receiving device E2 is a power receiving device and that the distance from the power router device R2 to the power receiving device E2 is 2L as second information.

  Here, the power generation device G determines the power transmission destination according to the distance between the power generation device G and the power receiving device E. As for the power receiving device E1 acquired from the power router device R1, the distance between the power generating device G and the power receiving device E1 is 2L. On the other hand, for the power receiving device E2 acquired from the power router device R2, the distance between the power generating device G and the power receiving device E2 is 4L. Therefore, the power generation device G determines the power receiving device E1 having a short distance from the power generation device G as the power transmission destination. After that, the power generation device G stores, as the first information of the storage unit Ga, information indicating that the distance between the power generation device G and the power receiving device E1 is 2L and the power transmission destination is the power router device R1. To update the first information.

  Note that the power receiving device E1 acquires from the power router device R1 that the power receiving device E1 is a power receiving device as second information. In this case, since the power receiving device E1 indicated in the second information includes the power receiving device E1 itself, the storage unit Ea of the power receiving device E1 does not update the first information. Similarly, the power receiving device E2 acquires, from the power router device R2, information indicating that the power receiving device E2 is a power receiving device. In this case, since the power receiving device E2 indicated in the second information includes the power receiving device E2 itself, the storage unit Ea of the power receiving device E2 does not update the first information.

  In addition, the power router device R1 acquires, from the power receiving device E1, information indicating that the power receiving device E1 is a power receiving device, as the second information. In addition, the power router device R1 acquires, as the second information, information indicating that there is no power receiving device that has received the information from the power generation device G. In this case, the power router device R1 keeps storing the information indicating that the power transmission destination is the power receiving device E1 and the distance between the power router device R1 and the power receiving device E1 is L.

  Similarly, the power router device R2 acquires, from the power receiving device E2, information indicating that the power receiving device E2 is a power receiving device, as the second information. In addition, the power router device R2 acquires, as the second information, information indicating that there is no power receiving device that has received the information from the power generation device G. In this case, the power router device R2 still stores information indicating that the power transmission destination is the power receiving device E2 and the distance between the power router device R2 and the power receiving device E2 is 2L.

  After the power receiving device E to which the power is transmitted is determined, the power from the power generating device G is transmitted to the power receiving device E. As described above, when it is determined that the power of the power generation device G is transmitted to the power reception device E1, the power of the power generation device G is transmitted to the power reception device E1 via the power router device R1.

  According to the power receiving device determination system 100 of the present embodiment, each node device N determines its own power receiving device by updating its own information based on information from the adjacent node device N. In the power receiving device determination system 100 illustrated in FIG. 5, the power receiving device to be the power transmission target is determined according to the distance between each node device N and the power receiving device E. The power is transmitted with higher priority. For this reason, the power loss accompanying the transmission of the power from the power generation device G can be reduced.

  In the power receiving device determination system 100 described above with reference to FIG. 4, while the power transmission destination is determined according to the power demand of the power receiving device E, the power receiving device determination system 100 described above with reference to FIG. Although the power transmission destination is determined according to the distance between the node device N and the power receiving device E, the present embodiment is not limited thereto. The power transmission destination may be determined according to both the power demand of the power receiving device E and the distance between the node device N and the power receiving device E.

  For example, the power transmission destination may be determined based on a potential gradient. Here, the potential gradient indicates a quotient obtained by dividing the absolute value of the power demand of the power receiving device E by the distance between the node device N and the power receiving device E. That is, the potential gradient is represented by the power demand (absolute value) of the power receiving device E with respect to the distance between the node device N and the power receiving device E.

  In this case, in the node device N illustrated in FIG. 2, the storage unit Na preferably stores the potential gradient information indicating the potential gradient as the first information. The acquisition unit Nb acquires information on the potential gradient from the adjacent node device N as second information. For example, the acquiring unit Nb acquires, from the adjacent node device N, information indicating the distance between the adjacent node device N and the power receiving device E, and information indicating the power demand of the power receiving device E as second information.

  When the obtaining unit Nb obtains the second information from a plurality of adjacent node devices N, the determining unit Nc determines one of the adjacent node devices N to transmit power from among the adjacent node devices N based on the second information. decide. For example, the determining unit Nc determines a node device N having the largest potential gradient corresponding to a plurality of adjacent node devices N as one node device that transmits power based on the plurality of pieces of second information.

  When the acquiring unit Nb acquires the second information from the adjacent node devices N, the updating unit Nd selects one piece of the second information having the largest potential gradient from the plurality of pieces of second information, The first information is updated based on the selected second information. For example, the updating unit Nd selects a node device N having the largest potential gradient from a plurality of adjacent node devices N based on the plurality of pieces of second information, and generates the first information based on the second information of the selected node device N. To update.

  First, the potential gradient will be described with reference to FIG. FIG. 6A shows a case where the power demands of the power receiving device E1 and the power receiving device E2 are equal, and the distance between the power generating device G and the power receiving device E1 is different from the distance between the power generating device G and the power receiving device E2. It is a schematic diagram for explaining a potential gradient. In FIG. 6A, the power generation device G is directly connected to the power receiving device E1 and the power receiving device E2. Here, the power demand of the power receiving device E1 is denoted by Pa, and the power demand of the power receiving device E2 is denoted by Pb. The distance between the power generation device G and the power receiving device E1 is denoted by Da, and the distance between the power generation device G and the power receiving device E2 is denoted by Db.

  Here, the power demand Pa of the power receiving device E1 is equal to the power demand Pb of the power receiving device E2 (Pa = Pb). However, distance Da between power generation device G and power reception device E1 is longer than distance Db between power generation device G and power reception device E2 (Da> Db). In this case, the potential gradient of the power receiving device E2 is higher than the potential gradient of the power receiving device E1. For this reason, it is preferable that the power of the power generation device G be transmitted to the power receiving device E2 instead of the power receiving device E1.

  FIG. 6B shows the potential gradient when the distance between the power generation device G and the power reception device E1 is equal to the distance between the power generation device G and the power reception device E2, and the power demands of the power reception devices E1 and E2 are different. It is a schematic diagram for description. In FIG. 6B, the power generation device G is directly connected to the power receiving device E1 and the power receiving device E2.

  Here, the distance Da between the power generation device G and the power reception device E1 is equal to the distance Db between the power generation device G and the power reception device E2 (Da = Db). However, the power demand Pa of the power receiving device E1 is larger than the power demand Pb of the power receiving device E1 (Pa> Pb). In this case, the potential gradient of the power receiving device E1 is higher than the potential gradient of the power receiving device E2. For this reason, it is preferable that the electric power of the power generation device G be transmitted to the power receiving device E1 instead of the power receiving device E2.

  As is clear from FIGS. 6 (a) and 6 (b), if other conditions are equal, the shorter the distance, the greater the potential gradient. Also, other things being equal, the higher the power demand, the greater the potential gradient.

  Next, a power receiving device determination method for determining a power receiving device that receives power in the power receiving device determination system 100 will be described with reference to FIG. FIGS. 7A to 7C are schematic diagrams illustrating a power receiving device determination method in the power receiving device determination system 100 according to the present embodiment.

  Here, it is assumed that the distance between the power receiving device E1 and the power router device R1 is 10, and the distance between the power router device R1 and the power generating device G is 10. The distance between the power generation device G and the power router device R2 is set to 20, and the distance between the power router device R2 and the power receiving device E2 is set to 20.

  In the power receiving device determination system 100 according to the present embodiment, the storage unit Na of each node device N stores information indicating a distance to an adjacent node device N. For example, the storage unit Ea of the power receiving device E1 stores information indicating that the distance to the power router device R1 is 10. The storage unit Ra of the power router device R1 stores information indicating that the distance to the power receiving device E1 is 10 and the distance to the power generating device G is 10. The storage unit Ga of the power generation device G stores information indicating that the distance to the power router device R1 is 10 and the distance to the power router device R2 is 20. The storage unit Ra of the power router device R2 stores information indicating that the distance to the power generation device G is 20 and the distance to the power receiving device E2 is 20. The storage unit Ea of the power receiving device E2 stores information indicating that the distance to the power router device R2 is 20.

  As shown in FIG. 7A, in the initial state, the node device N acquires the power demand of the node device N itself. The power receiving device E1 and the power receiving device E2 have a power demand. Here, the power demand of the power receiving device E1 is -100, and the power demand of the power receiving device E2 is -150. Therefore, the storage unit Ea of the power receiving device E1 stores information indicating that the power demand of the power receiving device E1 is -100. The storage unit Ea of the power receiving device E2 stores information indicating that the power demand of the power receiving device E2 is -150.

  On the other hand, the power demands of the power router device R1 and the power router device R2 are zero. For this reason, the storage unit Ra of the power router device R1 stores information indicating that the power demand is 0. The storage unit Ra of the power router device R2 stores information indicating that the power demand is zero. Similarly, the power demand of the power generator G is zero. For this reason, the storage unit Ga of the power generation device G stores information indicating that the power demand is 0.

  Thereafter, in the first period, each node device N acquires information held by the adjacent node device N from the adjacent node device N as second information.

  As illustrated in FIG. 7B, the power router device R1 determines that the power demand from the power receiving device E1 to the power receiving device E1 is -100 and the distance from the power receiving device E1 to the power receiving device E1 is 0 as the second information. Obtain information indicating that there is. After that, the power router device R1 reads that the distance from the power router device R1 to the power receiving device E1 is 10, and calculates that the potential gradient of the power receiving device E1 is 10 (= 100/10).

  In addition, the power router device R1 acquires, as the second information, information indicating that the power demand is 0 from the power generation device G. In this case, the power router device R1 calculates that the potential gradient for the power generation device G is 0.

  Thereafter, the power router device R1 compares the potential gradient of the power receiving device E1 and the potential gradient of the power generation device G, and selects the one with the higher potential gradient. Since the potential gradient (10) of the power receiving device E1 is higher than the potential gradient (0) of the power generating device G, the power router device R1 selects the power receiving device E1. The power router device R1 updates as first information in the storage unit Ra that the power demand of the power receiving device E1 is -100 and the distance from the power router device R1 to the power receiving device E1 is 10 as first information. .

  In addition, the power router device R2 acquires, as the second information, information indicating that the power demand from the power receiving device E2 to the power receiving device E2 is -150, and the distance from the power receiving device E2 to the power receiving device E2 is 0. . Thereafter, the power router device R2 reads that the distance from the power router device R2 to the power receiving device E2 is 20, and calculates that the potential gradient of the power receiving device E2 is 7.5 (= 150/20). .

  In addition, the power router device R2 acquires information indicating that the power demand is 0 from the power generation device G as the second information. In this case, the power router device R2 calculates that the potential gradient for the power generation device G is 0.

  Strictly, the power receiving device E1 acquires information indicating that the power demand is 0 from the power router device R1. However, the power receiving device E1 stores in advance information indicating that the power receiving device E1 itself is a power receiving device. For this reason, the storage unit Ea of the power receiving device E1 is not updated with the information from the power router device R1. Similarly, the power receiving device E2 acquires information indicating that the power demand is 0 from the power router device R2. However, the power receiving device E2 stores in advance information indicating that the power receiving device E2 itself is a power receiving device. For this reason, the storage unit Ea of the power receiving device E2 is not updated with the information from the power router device R2.

  In addition, the power generation device G acquires information indicating that the power demand is 0 from the power router device R1 and the power router device R2. Therefore, even after the end of the first period, the first information stored in the storage unit Ga of the power generation device G indicates that the power demand is zero.

  Also in the second period, each node device N obtains information held by the adjacent node device N from the adjacent node device N as second information.

  As shown in FIG. 7C, in the power generation device G, as the second information, the power demand from the power router device R1 to the power receiving device E1 is -100, and the distance from the power router device R1 to the power receiving device E1 is 10 Get information indicating that After that, the power generation device G reads that the distance from the power generation device G to the power router device R1 is 10, and calculates that the potential gradient for the power reception device E1 is 5 (= 100 / (10 + 10)).

  In addition, the power generation device G acquires, as the second information, information indicating that the power demand of the power receiving device E2 from the power router device R2 is -150, and the distance from the power router device R2 to the power receiving device E2 is 20. I do. After that, the power generation device G reads that the distance from the power generation device G to the power router device R2 is 20, and calculates that the potential gradient for the power receiving device E2 is 3.75 (= 150 / (20 + 20)). I do.

  Thereafter, the power generation device G compares the potential gradient of the power receiving device E1 and the potential gradient of the power receiving device E2, and selects a device having a higher potential gradient. Here, the power generation device G determines the power transmission destination according to the magnitude of the potential gradient. The potential gradient based on the power demand acquired from the power router device R1 is 5, and the potential gradient based on the power demand acquired from the power router device R2 is 3.75. Decide to transmit power. After that, the power generation device G updates the first information in the storage unit Ga that the power demand of the power reception device E1 is -100 and the distance from the power generation device G to the power reception device E1 is 20 as the first information. .

  In addition, the power receiving device E1 acquires information indicating that the power demand of the power receiving device E1 is -100 from the power router device R1. In this case, since the power receiving device E1 indicated in the second information includes the power receiving device E1 itself, the storage unit Ea of the power receiving device E1 does not update the first information. Similarly, the power receiving device E2 acquires, from the power router device R2, information indicating that the power demand of the power receiving device E2 is -150. In this case, since the power receiving device E2 indicated in the second information includes the power receiving device E2 itself, the storage unit Ea of the power receiving device E2 does not update the first information.

  The power router device R1 acquires, as the second information, information indicating that the power demand from the power receiving device E1 to the power receiving device E1 is -100 and the distance from the power receiving device E1 to the power receiving device E1 is 0. In addition, the power router device R1 acquires, from the power generation device G, second information indicating that the power demand is 0. In this case, the power router device R1 still stores information indicating that the power demand of the power receiving device E1 is -100, the power transmission destination is the power receiving device E1, and the distance to the power receiving device E1 is L. .

  Similarly, the power router device R2 obtains, as the second information, information indicating that the power demand from the power receiving device E2 to the power receiving device E2 is -150 and the distance from the power receiving device E2 to the power receiving device E2 is 0. I do. Further, the power router device R2 acquires, from the power generation device G, second information indicating that the power demand is 0. In this case, the power router device R2 still stores information indicating that the power demand of the power receiving device E2 is -150, the power transmission destination is the power receiving device E2, and the distance to the power receiving device E2 is 2L. .

  After the power receiving device E to which the power is transmitted is determined, the power is transmitted. As described above, when it is determined that the power of the power generation device G is transmitted to the power reception device E1, the power of the power generation device G is transmitted to the power reception device E1 via the power router device R1.

  As described above with reference to FIG. 7, according to the power receiving device determination system 100 of the present embodiment, each node device N updates its own information based on information from an adjacent node device N, A power receiving device to be transmitted is determined. In the power receiving device determination system 100 illustrated in FIG. 7, a power receiving device to be a power transmission target is determined according to the magnitude of the potential gradient.

  FIG. 8 is a schematic diagram of the power transmission unit Re of the power router device R in the power receiving device determination system 100 of the present embodiment. The power transmission unit Re may include a power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). Alternatively, the power transmission unit Re may include an IGBT (Insulated Gate Bipolar Transistor).

  As illustrated in FIG. 8, the power transmission unit Re includes terminals T1 to T5, and switches SW1 and SW2. Each of the terminals T1 to T5 is connected to a different node device N.

  Each of the switches SW1 and SW2 connects between any two of the terminals T1 to T5 so that power can be transmitted. For example, the switch SW1 connects the terminal T2 and the terminal T5 so that power can be transmitted at a certain time. The switch SW2 connects the terminal T1 and the terminal T4 so that power can be transmitted at another time.

  That is, the power router device R can transmit power from the terminal T2 to the terminal T5 by closing the switch SW1 at a certain time. The power router device R can transmit power from the terminal T1 to the terminal T4 by closing the switch SW2 at another time.

  In the power receiving device determination system 100, power may be transmitted continuously or intermittently. For example, by intermittently transmitting power in a pulsed manner, a situation in which a specific power receiving device is not transmitted for a long time can be avoided. Such a power pulse is suitable for transmitting power when there are a plurality of power generation devices in a power network.

  Here, with reference to FIG. 1 to FIG. 4 and FIG. 9, power transmission of a power pulse in the power receiving device determination system 100 will be described. FIG. 9A is a schematic diagram illustrating power pulses in a plurality of synchronization frames in the power receiving device determination system 100 of the present embodiment.

  When the power generation device G transmits power to the power receiving device E, the power from the power generation device G is transmitted as a power pulse. For example, the time axis is divided into equally-spaced synchronization frames, and the synchronization frames are time-synchronized throughout the power receiving device determination system. The synchronization frame is divided into a plurality of power slots. FIG. 9A shows three synchronization frames, and each synchronization frame is divided into six power slots. For example, the period of the synchronization frame is 1 second.

  The power generation device G transmits a power pulse to the power reception device E using at least one of the plurality of power slots. In FIG. 9A, the power generation device G transmits a power pulse to the power reception device E using the second power slot. When one power pulse is 100J, 100 W of power can be transmitted by transmitting one power pulse every one second synchronization frame.

  In this case, each of the first information and the second information in the node device N illustrated in FIG. 2 preferably includes power slot information. The power slot information indicates whether each of the plurality of power slots is used for transmitting a power pulse. The update unit Nd of the node device N updates the power slot information of the first information based on the power slot information of the second information.

  In FIG. 9A, one power pulse is transmitted in one synchronization frame, but a plurality of power pulses may be transmitted in one synchronization frame.

  FIG. 9B is a schematic diagram illustrating a plurality of power pulses transmitted in a synchronization frame in the power receiving device determination system 100 of the present embodiment. In FIG. 9B, the power generation device G transmits a power pulse to the power reception device E using the second power slot and the fifth power slot. If one power pulse is 100 J, 200 W of power can be transmitted by transmitting two power pulses per one second synchronization frame.

  As described above with reference to FIGS. 4, 5, and 7, after the second period, the second information acquired by the power receiving device E from the node device N adjacent to the power receiving device E is the power receiving device E itself. This is often information that indicates In this case, the power receiving device E has little significance in acquiring the second information from the node device N adjacent to the power receiving device E. Therefore, the power receiving device E does not need to acquire the second information from the node device N adjacent to the power receiving device E.

  Similarly, the second information acquired from the power generation device G by the node device N adjacent to the power generation device G is often information unrelated to the power receiving device E. In this case, it is not significant that the node device N adjacent to the power generation device G acquires the second information from the power generation device G. Therefore, the node device N adjacent to the power generation device G need not acquire the second information from the power generation device G.

  In the above description with reference to FIGS. 4, 5 and 7, the storage unit Na of the node device N stores information indicating the node device of the power transmission destination, but the present invention is not limited to this. Power transmission route information indicating a route from the node device to the power receiving device may be stored in the storage unit Na of the node device N. In particular, when power is transmitted through different paths in different power slots in one synchronization frame, the storage unit Na of the node device N preferably stores power transmission path information indicating a path from the node device to the power receiving device. .

  Next, a power receiving device determination system 100 in which the node devices N are branched and connected will be described with reference to FIGS. FIG. 10 is a schematic diagram of the power receiving device determination system 100 of the present embodiment. Here, the power receiving device determination system 100 includes node devices N1 to N12. Here, the node devices N1 and N10 are power generation devices, the node devices N7, N8, N9, N11, and N12 are power receiving devices, and the node devices N2 to N6 are power router devices.

  The power demands of the node devices N7, N8, N9, N11, and N12 are -4.3 kW, -2.8 kW, -3.8 kW, -8.2 kW, and -1.5 kW, respectively. The node device N1 is connected to the node devices N2 to N5. The node device N2 is connected to the node devices N1 and N6. The node device N3 is connected to the node devices N1 and N7. The node device N4 is connected to the node devices N1, N8, and N12. The node device N5 is connected to the node devices N1 and N9. The node device N6 is connected to the node devices N2, N10, and N11.

  The node device N7 is connected to the node device N3. The node device N8 is connected to the node device N4. The node device N9 is connected to the node device N5. The node device N10 is connected to the node device N6. The node device N11 is connected to the node device N6. The node device N12 is connected to the node device N4.

  Here, the distance between the node device N1 and the node device N2 is 22.4 m, the distance between the node device N1 and the node device N3 is 15.8 m, and the distance between the node device N1 and the node device N4. The distance between them is 22.4 m, and the distance between the node device N1 and the node device N5 is 26.9 m. The distance between the node device N2 and the node device N6 is 15.8 m, the distance between the node device N6 and the node device N10 is 20.0 m, and the distance between the node device N6 and the node device N11. Is 18.0 m.

  The distance between the node device N3 and the node device N7 is 20.6 m, the distance between the node device N4 and the node device N8 is 20.0 m, and the distance between the node device N4 and the node device N12. Is 21.2 m, and the distance between the node device N5 and the node device N9 is 20.6 m. In the power receiving device determination system 100 of the present embodiment, the storage unit Na of each node device N stores information indicating a distance to an adjacent node device N.

  In the power receiving device determination system 100 of the present embodiment, each of the node devices N1 to N12 determines the power transmission destination based on the potential gradient. In the power receiving device determination system 100, the time axis is divided into equally-spaced synchronization frames, and the synchronization frames are time-synchronized throughout the power receiving device determination system 100. The synchronization frame is divided into six power slots. Here, in the first and sixth power slots, power is transmitted to the node devices N1-N4-N8, and in the fourth and fifth power slots, power is transmitted to the node devices N1-N3-N7. Is set. In the second and third power slots, power is set to be transmitted to the node devices N10-N6-N11.

  Here, a method of determining a power transmission destination in the node device N1 in the power receiving device determination system 100 in FIG. 10 will be described with reference to FIGS. 11 and 12. Here, a method of determining the power receiving device of the node device N1 in the third period will be described. FIG. 11 is a table for explaining a power transmission destination determining method in the node device N1 in the power receiving device determination system 100 in FIG. As illustrated in FIG. 11, the node device N1 acquires the second information from the node devices N2 to N5. The second information is information of the node devices N2 to N5 after the second period. Here, the node device N1 acquires, as the second information, information indicating the target power receiving device, the power demand, the distance to the target power receiving device, the potential gradient, the power transmission path, and the available power slot.

  In the second information from the node device N2, the target power receiving device is the node device N11, the power demand is −8200 W, the distance to the target power receiving device is 33.8 m, the potential gradient is 242, and the power transmission path is Is a node device N2-N6-N11. Also, the second and third power slots are to be used, while the first, fourth, fifth and sixth power slots are free.

  In the second information from the node device N3, the target power receiving device is the node device N7, the power demand is −4300 W, the distance to the target power receiving device is 20.6 m, the potential gradient is 209, and the power transmission path is Are the node devices N3-N7. Also, the fourth and fifth power slots are to be used, while the first, second, third and sixth power slots are free.

  In the second information from the node device N4, the target power receiving device is the node device N8, the power demand is -2800 W, the distance to the target power receiving device is 20.0 m, the potential gradient is 140, and the power transmission path is Are node devices N4-N8. Also, the first and sixth power slots are to be used, while the second, third, fourth and fifth power slots are free.

  In the second information from the node device N5, the target power receiving device is the node device N9, the power demand is −3800 W, the distance to the target power receiving device is 20.6 m, the potential gradient is 184, and the power transmission path is Are the node devices N5-N9. Also, the first, second, third, fourth, fifth and sixth power slots are all empty.

  The node device N1 determines a power receiving device based on the second information from the node devices N2 to N5. Here, the node device N1 calculates a potential gradient corresponding to the node devices N2 to N5 based on the second information from the node devices N2 to N5.

  The power demand acquired by the node device N1 as the second information from the node device N2 is -8200W. From the distance of 33.8 m to the node device N11 and the distance of 22.4 m between the node devices N1 and N2 acquired as the second information, the distance from the node device N1 to the node device N11 is 56.2 m (= 33.8 + 22). .4), and a potential gradient 146 (= 8200 / 56.2) is calculated from the power demand and the distance to the target power receiving device.

  The power demand acquired by the node device N1 as the second information from the node device N3 is -4300W. From the distance of 20.6 m to the node device N7 and the distance of 15.8 m between the node devices N1 and N3 acquired as the second information, the distance from the node device N1 to the node device N7 is 36.4 m (= 20.6 + 15). .8), and a potential gradient 118 (= 4300 / 36.4) is obtained from the power demand and the distance to the target power receiving device.

  The power demand acquired by the node device N1 as the second information from the node device N4 is -2800W. From the distance 20.0 m to the node device N8 and the distance 22.4 m between the node devices N1 and N4 acquired as the second information, the distance 42.4m from the node device N1 to the node device N8 (= 20.0 + 22) .4), and a potential gradient 66 (= 2800 / 42.4) is calculated from the power demand and the distance to the target power receiving device.

  The power demand acquired by the node device N1 as the second information from the node device N5 is -3800W. From the distance 20.6 m to the node device N9 and the distance 26.9 m between the node device N1 and the node device N5 acquired as the second information, the distance from the node device N1 to the node device N9 is 47.5 m (= 20.6 + 26). .9), and a potential gradient 80 (= 3800 / 47.5) is calculated from the power demand and the distance to the target power receiving device.

  The node device N1 has the highest potential gradient for the node device N2 when comparing the potential gradients of the node devices N2 to N5. However, here, the first, fourth, fifth, and sixth power slots are already scheduled to be used in the node device N1, and only the second and third power slots are vacant. On the other hand, in the path information on the node device N2, the second and third power slots are already scheduled to be used, and only the first, fourth, fifth, and sixth power slots are free. Therefore, there is no available power slot for the power transmission path to the node devices N1-N2-N6-N10, and the node device N1 cannot transmit power to the node device N10 via the node devices N2 and N6.

  Therefore, the node device N1 compares the potential gradients of the node devices N3 to N5 except for the node device N2. In this case, the potential gradient for the node device N3 is the highest.

  FIG. 12 is a schematic diagram for explaining a method of determining a power slot that can be used in the power transmission path of the node device N1 in the power receiving device determination system 100 in FIG. As shown in FIG. 12, the node device N1 has already set the first, fourth, fifth, and sixth power slots to be used within one synchronization frame, while leaving the second and third power slots empty. I have.

  On the other hand, in the path information for the node device N3, the fourth and fifth power slots are already scheduled to be used, and the first, second, third, and sixth power slots are vacant. Therefore, if the vacant power slot in the node device N1 and the vacant power slot in the path information of the node device N3 overlap, power can be transmitted from the node device N1 via the path indicated in the path information for the node device N3. . Here, the second and third power slots can be used for a power transmission path to the node devices N1-N3-N7. Therefore, the node device N1 determines to transmit power from the node devices N2 to N5 to the node device N3. As described above, the node device superimposes its own usable power slot and the usable power slot in the node device included in the power transmission path information acquired as the second information from the node device having a high potential gradient. And a usable power slot in the power transmission path information of the node device.

  Referring again to FIG. 11, the node device N1 updates the first information based on the second information acquired from the node device N3. Specifically, based on the second information acquired from the node device N3, the node device N1 determines that the target power receiving device is the node device N7, the power demand is -4300W, and the node device N1 to the node device N7 Information indicating that the distance is 36.4 m is stored. Further, in the node device N1, the power transmission path to the node device N7 is the node device N1-N3-N7, and all of the first, fourth, fifth, and sixth power slots are to be used, and the second, The three power slots store information indicating that they are free. As described above, the node device N1 can determine a power receiving device that transmits power based on the second information from the node devices N2 to N5.

  Next, changes in the first information stored in the storage unit Na of each node device N in the power receiving device determination system 100 in FIG. 10 will be described with reference to FIGS. 1, 2, 13, and 14. FIG. 13 is a table showing the initial state in the power receiving device determination system 100 and the first information stored in the storage unit Na of each node device N after the first period. FIG. 14 is a table showing the power receiving device determination system in FIG. 7 is a table showing first information stored in the storage unit Na of each node device N after the second state and the third period in FIG.

  In the initial state, the node devices N1 to N12 acquire their own power demands. The node devices N7, N8, N9, N11, and N12 are power receiving devices and have a power demand. Therefore, each of the node devices N7, N8, N9, N11, and N12 is the target power receiver, and stores information indicating the power demand.

  On the other hand, since the node devices N1 and N10 are power generation devices and the node devices N2 to N6 are power router devices, the power demands of the node devices N1 to N6 and N10 are zero. Therefore, the node devices N1 to N6 and N10 store information indicating that the respective power demands are 0.

  Thereafter, in the first period, each of the node devices N1 to N12 acquires, from the adjacent node device N, information held by the adjacent node device N as second information. For example, the node device N1 acquires the second information indicating that the power demand is zero from the node devices N2 to N4.

  The node device N3 acquires, from the node device N7, second information indicating that the node device N7 is a power receiving device and the power demand of the node device N7 is -4.3 kW. In this case, the node device N3 calculates that the potential gradient of the node device N7 is 209 (= 4300 / 20.6). The node device N3 has, as the first information of the storage unit Na, that the target power receiving device is the node device N7, the power demand is -4.3 kW, and the distance from the node device N3 to the node device N7 is 20.6 m. , The potential gradient is 209, the power transmission path is N3-N7, and information indicating a power slot available in the node device on the power transmission path is updated as first information.

  In addition, the node device N4 acquires from the node device N8 second information indicating that the node device N8 is a power receiving device and the power demand of the node device N8 is -2.8 kW. In this case, the node device N4 calculates that the potential gradient of the node device N8 is 140 (= 2800 / 20.0).

  Further, the node device N4 obtains, from the node device N12, second information indicating that the node device N12 is a power receiving device and the power demand of the node device N12 is -1.5 kW. In this case, the node device N4 calculates that the potential gradient of the node device N12 is 70.7 (= 1500 / 21.2).

  The node device N4 compares the potential gradient from the node device N8 with the potential gradient from the node device N12, and selects the node device N8. The node device N4 has, as the first information of the storage unit Na, that the target power receiving device is the node device N8, that the power demand is -2.8 kW, and that the distance from the node device N4 to the node device N8 is 20.0 m. , The potential gradient is 140, the power transmission path is N4-N8, and information indicating a power slot available in the node device on the power transmission path is updated as first information.

  Thereafter, in the second period, each of the node devices N1 to N12 acquires, from the adjacent node device N, information held by the adjacent node device N as second information. For example, the node device N1 acquires information indicating that the power demand of the node device N2 is zero from the node device N2.

  In addition, the node device N1 acquires, from the node device N3, second information indicating that the node device N7 is a power receiving device and the power demand of the node device N7 is -4.3 kW. In this case, the node device N1 calculates that the potential gradient for the node device N3 is 118 (= 4300 / (20.6 + 15.8)).

  In addition, the node device N1 acquires, from the node device N4, second information indicating that the node device N8 is a power receiving device and the power demand of the node device N8 is -2.8 kW. In this case, the node device N1 calculates that the potential gradient for the node device N4 is 65 (= 2800 / (20.6 + 22.4)).

  Further, the node device N1 acquires, from the node device N5, second information indicating that the node device N9 is a power receiving device and the power demand of the node device N9 is -3.8 kW. In this case, the node device N1 calculates that the potential gradient for the node device N5 is 80 (= 3800 / (20.6 + 26.9)).

  Thereafter, the node device N1 compares the potential gradients of the node devices N2 to N4 and selects the node device N3. The node device N1 has, as the first information of the storage unit Na, that the target power receiving device is the node device N7, the power demand is -4.3 kW, and the distance from the node device N1 to the node device N7 is 36.4 m. , The potential gradient is 118, the power transmission path is N1-N3-N7, and information indicating a power slot that can be used by a node device on the power transmission path is updated as first information.

  Thereafter, in the third period, each of the node devices N1 to N12 obtains information held by the adjacent node device N from the adjacent node device N as second information. Note that the method of determining the power receiving destination of the node device N1 in the third period is as described above with reference to FIGS.

  The embodiment of the invention has been described with reference to the drawings. However, the present invention is not limited to the above embodiment, and can be implemented in various modes without departing from the gist of the present invention. The drawings schematically show each component in order to make it easy to understand, and the thickness, length, number, etc. of each component shown in the drawings are different from actual ones for convenience of drawing. There are cases. Further, the shapes, dimensions, and the like of the respective constituent elements shown in the above-described embodiment are merely examples, and are not particularly limited, and various changes can be made without substantially departing from the configuration of the present invention.

  INDUSTRIAL APPLICABILITY The present invention is applicable to the fields of a power receiving device determination system, a power receiving device determination method, and a power receiving device determination device.

100 power receiving device determination system N node device E power receiving device G power generating device R power router device

Claims (10)

A power receiving device determination system that determines one power receiving device to which a power generating device transmits power from among a plurality of power receiving devices,
With multiple node devices,
Each of the plurality of node devices indicates the power generation device, and any one of the plurality of power receiving devices, or a power router device,
The power router device receives power from one of the adjacent plurality of node devices, and transmits power to another one of the adjacent plurality of node devices,
Each of the plurality of node devices is connected to an adjacent node device by a transmission line,
Each of the plurality of node devices is communicably connected to the adjacent node device,
Each of the plurality of node devices includes:
A storage unit for storing first information;
An acquisition unit configured to acquire second information held by the adjacent node device from the adjacent node device;
A determining unit that determines one node device that transmits the power from the adjacent node devices based on the second information;
An updating unit that updates the first information based on the second information,
The power receiving device determination system, wherein each of the first information and the second information includes at least one of information indicating power demand of the power receiving device and information indicating a distance between the node device and the power receiving device. Each of the first information and the second information includes potential gradient information,
The potential gradient information indicates a potential gradient,
The power receiving device determination system according to claim 1, wherein the potential gradient indicates a quotient obtained by dividing power demand of the power receiving device by a distance between the node device and the power receiving device.   When the obtaining unit obtains a plurality of pieces of the second information from a plurality of adjacent node devices, the updating unit determines one piece of the second information having the largest potential gradient from among the pieces of the second information. The power receiving device determination system according to claim 2, wherein the first information is selected and updated based on the one piece of second information. Each of the first information and the second information includes power transmission path information,
4. The power receiving device determination system according to claim 1, wherein the updating unit updates the power transmission path information of the first information based on the power transmission path information of the second information. 5. The power transmission path information includes node identification information,
The power receiving device determination system according to claim 4, wherein the node identification information indicates a node device configuring a power transmission path.   The power receiving device determination system according to claim 1, wherein the power generating device transmits a power pulse to the one power receiving device. The time axis is divided into equally spaced sync frames,
The synchronization frame is time-synchronized throughout the power receiving device determination system,
The synchronization frame is divided into a plurality of power slots,
The power receiving device determination system according to claim 6, wherein the power generating device transmits the power pulse to the one power receiving device by using one of the plurality of power slots. Each of the first information and the second information includes power slot information,
The power slot information indicates whether each of the plurality of power slots is used for transmitting the power pulse,
The power receiving device determination system according to claim 7, wherein the update unit updates the power slot information of the first information based on the power slot information of the second information. A power receiving device determination method in a power receiving device determination system that determines one power receiving device to which a power generation device transmits power from a plurality of power receiving devices,
The power receiving device determination system,
With multiple node devices,
Each of the plurality of node devices indicates the power generation device, and any one of the plurality of power receiving devices, or a power router device,
The power router device receives power from one of the adjacent plurality of node devices, and transmits power to another one of the adjacent plurality of node devices,
Each of the plurality of node devices is connected to an adjacent node device by a transmission line,
Each of the plurality of node devices is communicably connected to the adjacent node device,
Each of the plurality of node devices includes a storage unit that stores first information,
The power receiving device determination method,
An acquiring step in which each of the plurality of node devices acquires second information held by the adjacent node device from the adjacent node device;
An updating step of updating the first information based on the second information;
Determining, based on the first information, one node device that transmits the power from the adjacent node devices,
The power receiving device determination method, wherein each of the first information and the second information includes at least one of information indicating power demand of the power receiving device and information indicating a distance between the node device and the power receiving device. A power receiving device determination device that configures a power receiving device determination system that determines one power receiving device to which a power generation device transmits power from a plurality of power receiving devices,
The power receiving device determination system,
With multiple node devices,
Each of the plurality of node devices indicates the power generation device, and any one of the plurality of power receiving devices, or a power router device,
The power router device receives power from one of the adjacent plurality of node devices, and transmits power to another one of the adjacent plurality of node devices,
Each of the plurality of node devices is connected to an adjacent node device by a transmission line,
Each of the plurality of node devices is communicably connected to the adjacent node device,
Each of the plurality of node devices includes the power receiving device determination device,
The power receiving device determination device,
A storage unit for storing first information;
An acquisition unit configured to acquire second information held by the adjacent node device from the adjacent node device;
A determining unit that determines one node device that transmits the power from the adjacent node devices based on the second information;
An updating unit that updates the first information based on the second information,
The power receiving device determination device, wherein each of the first information and the second information includes at least one of information indicating power demand of the power receiving device and information indicating a distance between the node device and the power receiving device.

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