Power receiving control method for a power receiving element, and power receiving control device for a power receiving element.

Abstract

To provide a power reception control method capable of reaching a power storage amount required by a power consumption element within a time a user desires.SOLUTION: When a first differential power obtained by subtracting a present value of a total transmission power transmitted to a load group through a power supply base point from a maximum value of a total transmission power which can be transmitted to the load group through the power supply base point is equal to or less than an allowance amount preset, and a first element reception power in a previous processing cycle is larger than an output control threshold value in a previous processing cycle, a first element differential power of a power reception element is calculated by multiplying a priority degree of the power reception element indicating a degree of a power reception of itself having priority to a power reception of another power reception element by a second differential power obtained by subtracting the first differential power from the allowance amount. By subtracting the first element differential power from the first element reception power in the previous processing cycle, the first element reception power is updated, and a power reception device of the power reception element is controlled so as to receive the first element reception power after update.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for controlling the power reception of a power receiving element, and a power receiving control device for a power receiving element. [Background technology]

[0002] Japanese Patent Publication No. 6168528 (Patent Document 1) describes a technique for controlling the power consumption of each power-consuming element based on a constraint on the total power consumption consumed by an entire group of multiple power-consuming elements. Specifically, the following is described: A broadcast transmission element broadcasts a function of the difference between the current value of the total power consumption and a reference value of the total power consumption (total power consumption adjustment instruction value) within the group. Each power-consuming element controls its own power consumption using this function and the priority assigned to it. As a result, the current value of the total power consumption of the entire group converges to and is constrained by the reference value of the total power consumption. Consequently, each power-consuming element can be controlled independently of the power control broadcast transmission element and other power-consuming elements. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Patent No. 6168528 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, Patent Document 1 does not take into account the user's requirements for each power-consuming element when setting priorities. Therefore, even if the difference between the current total power consumption and the reference total power consumption can be distributed equally among the power-consuming elements, it may not be possible to reach the amount of energy storage required by each power-consuming element within the time desired by the user.

[0005] The present invention has been made in view of the above problems, and its objective is to provide a power receiving control method and a power receiving control device for a power receiving element that can reach the amount of stored energy required by the power consuming element within a time desired by the user. [Means for solving the problem]

[0006] A power receiving control method and power receiving control device according to one aspect of the present invention are used in a power system that supplies electrical energy to a load group including a plurality of power receiving elements via a power supply base point. In this system, a power receiving control device mounted on a power receiving element controls the first element power, which is the power received by the power receiving element, by repeating a processing cycle. Information is obtained indicating the first differential power, which is obtained by subtracting the current value of the total power being sent to the load group via the power supply base point from the maximum value of the total power that can be sent to the load group via the power supply base point. Information is obtained indicating the required charge amount, which is the amount of power required by the power receiving element, and the remaining time that can be charged by the power receiving element. An output control threshold is calculated by dividing the required charge amount by the rechargeable time. If the first differential power is less than or equal to a preset margin, and the first element power received in the previous processing cycle is greater than the output control threshold in the previous processing cycle, the first element differential power of the receiving element is calculated by multiplying the second differential power (obtained by subtracting the first differential power from the margin) by the priority of the receiving element, which indicates the degree to which its own power reception is prioritized over the power reception of other receiving elements. The first element power received is updated by subtracting the first element differential power from the first element power received in the previous processing cycle, and the power receiving device of the receiving element is controlled to receive the updated first element power. [Effects of the Invention]

[0007] According to one aspect of the present invention, the amount of stored energy required by the power consumption element can be reached within a time desired by the user. [Brief explanation of the drawing]

[0008] [Figure 1]Figure 1 is a block diagram showing the configuration of a power receiving control device and its peripheral devices according to the first embodiment. [Figure 2] Figure 2 is a flowchart showing an example of processing steps performed by the power receiving control device according to the first embodiment. [Figure 3A] Figure 3A is a stacked line graph showing a first example of the first element power received by each electric vehicle in the first embodiment. [Figure 3B] Figure 3B is a graph showing the first element power received and output control threshold for each electric vehicle in Figure 3A. [Figure 3C] Figure 3C is a graph showing the required charge amount for each electric vehicle as shown in Figure 3A. [Figure 4A] Figure 4A is a stacked line graph showing a second example of the first element power received by each electric vehicle in the first embodiment. [Figure 4B] Figure 4B is a graph showing the first element power received and output control threshold for each electric vehicle in Figure 4A. [Figure 4C] Figure 4C is a graph showing the required charge amount for each electric vehicle, as shown in Figure 4A. [Figure 5] Figure 5 is a graph that is an enlarged portion of Figure 3B. [Figure 6A] Figure 6A is a flowchart showing an example of processing steps performed by the power receiving control device according to the second embodiment. [Figure 6B] Figure 6A is a flowchart showing an example of processing steps performed by the power receiving control device according to the second embodiment. [Figure 7] Figure 7 is a graph showing an example of the first element power received and output control threshold for each electric vehicle in the second embodiment. [Figure 8] Figure 8 is a diagram illustrating a method for calculating the output control threshold of a power receiving control device according to a modified example of the present invention. [Modes for carrying out the invention]

[0009] Embodiments of the present invention and their modifications will be described below with reference to the drawings. In the drawings, identical parts are denoted by the same reference numerals and their descriptions are omitted.

[0010] [First Embodiment] Referring to Figure 1, the configuration of the power receiving control device and its peripheral devices for an electric vehicle (an example of a power receiving element) according to the first embodiment will be described. In a power system that supplies electrical energy to a load group 11 including multiple electric vehicles (EV1, EV2, EV3, ...) via power equipment 12 (an example of a power supply base point 10), the power receiving control device controls the element power, which is the power received by electric vehicle EV1 included in the load group 11, by repeating a predetermined processing cycle.

[0011] The power receiving control device includes a receiving device 21 that receives electrical signals from an external source, a vehicle status acquisition device 22 that acquires information indicating the state of the electric vehicle EV1, and a calculation device 23 that calculates the first element power received by the electric vehicle EV1. The electric vehicle EV1 includes a power receiving device 24 that receives power from an external source, a battery 25 that stores the power (first element power received) received by the power receiving device 24, and a motor 26 that is driven based on the electrical energy or first element power received by the battery 25.

[0012] A "processing cycle" includes the following processing steps (in the following, the subscripts "t" and "t+1" indicate the number of times the "processing cycle" is repeated, and t is an integer). (a) The receiving device 21 obtains information indicating the first differential power (△P), which is obtained by subtracting the current value of the total power being transmitted to the load group 11 via the power equipment 12 (Pall_now) from the maximum value of the total power that can be transmitted to the load group 11 via the power equipment 12 (Pall_max). (b) The vehicle status acquisition device 22 acquires information indicating the required charge amount (Ereq), which is the amount of electricity required by the electric vehicle EV1, and the remaining chargeable time (Tleave), which is the remaining time during which the power receiving element can be charged. (c) The computing device 23 calculates the output control threshold (L) by dividing the required charge amount (Ereq) by the charging time (Tleave). t+1 Calculate ). (d) The calculation device 23 calculates the priority (β) of electric vehicle EV1, which indicates the degree to which its own power reception is prioritized over the power reception of other electric vehicles (EV2, EV3, ...). (e) The computing device 23 determines that the first differential power (ΔP) is less than or equal to a preset margin (ΔPmargin), and that the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t Determine whether the first condition, that it is greater than ), is met. (f) If the first condition is met, the calculation device 23 uses the first equation described later to calculate the first element power received (P t+1 ) Update. If the first condition is not met, the calculation device 23 uses the second formula described later to calculate the first element power received (P t+1 ) Update. (g) The calculation device 23 calculates the updated first element power received (P t+1 The electric vehicle EV1 is controlled to receive power from the )

[0013] Here, in the embodiments and modifications, “electric vehicle” is an example of a “power storage element” or “power receiving element” that receives power transmitted via power equipment 12. The power storage element stores the received power in a battery (including secondary batteries, storage batteries, and rechargeable batteries). The “power storage element” includes all equipment and devices equipped with batteries, such as vehicles (including electric vehicles, hybrid vehicles, construction machinery, and agricultural machinery), railway vehicles, play equipment, tools, household products, and daily necessities.

[0014] An "energy storage element" is an example of a "power receiving element" that receives power transmitted via power equipment 12. In addition to "energy storage elements," "power receiving elements" also include "power consumption elements" that consume the received power without storing it. "Power consumption elements" include railway vehicles, play equipment, tools, household products, and daily necessities. "Power consumption elements" may have batteries, such as electric vehicles. If an electric vehicle receives power and transmits it directly to the motor without storing it in a battery, and consumes it as driving force for the motor, then the electric vehicle is an example of a "power consumption element." Thus, "power consumption elements" include all equipment and devices that consume the received power without storing it, regardless of whether or not they have batteries.

[0015] Both "energy storage element" and "power receiving element" represent unit configurations for power receiving control by a power receiving control device. That is, power receiving control related to the embodiments and modifications is performed using the energy storage element or power receiving element as a unit. For example, power receiving control related to the embodiments and modifications is performed independently and in parallel for each of the multiple electric vehicles (EV1, EV2, EV3, ...).

[0016] In the embodiments, an energy storage element is given as an example of a power receiving element, and an electric vehicle (EV) that uses electricity as an energy source and runs using a motor 26 as a power source is given as an example of an energy storage element. However, the power receiving element and energy storage element in the present invention are not intended to be limited to electric vehicles (EVs).

[0017] In the embodiments and modified examples, "power equipment 12" is an example of a power supply base point 10.

[0018] The embodiments and modifications describe an example in which the power receiving control device is mounted on an electric vehicle EV1. Of course, the power receiving control device may also control the elemental power of the electric vehicle EV1 from outside the electric vehicle EV1 using short-range wireless communication technologies such as short-range wireless, wireless LAN, wireless WAN, or a mobile phone communication network.

[0019] Furthermore, although we will explain using the configuration of one electric vehicle EV1 (EV1, EV2, EV3, ...) included in load group 11 as an example, the other electric vehicles (EV2, EV3, ...) included in load group 11 also have the same configuration as electric vehicle EV1.

[0020] The power receiving control device controls the power received by the electric vehicle EV1 via the power equipment 12. The electric vehicle EV1 is equipped with a power receiving device 24 called an onboard charger (OBC). The computing device 23 controls the power received by the power receiving device 24 via the power equipment 12. The power received by the power receiving device 24 is stored in the battery 25. Alternatively, the electric vehicle EV1 may not store the power received by the power receiving device in the battery 25, but instead directly supply it to the motor 26 as a drive source.

[0021] The power supplied to the electric vehicle EV1 via the power equipment 12 is measured by the current measuring device 13. The power value measured by the current measuring device 13 is transmitted to the differential information transmitting device 14.

[0022] Electrical energy is supplied to multiple electric vehicles (EV1, EV2, EV3, ...) included in the load group 11 via a single power facility 12. Furthermore, electrical energy may also be supplied not only to the multiple electric vehicles (EV1, EV2, EV3, ...) but also to one or more other power-consuming elements 15 included in the load group 11 via the single power facility 12. The multiple electric vehicles (EV1, EV2, EV3, ...) and one or more other power-consuming elements 15 that receive electrical energy via the power facility 12 form a single group (load group 11).

[0023] The current measuring device 13 measures the current value (Pall_now) of the total transmitted power being sent via the power equipment 12 to all electric vehicles (EV1, EV2, EV3, ...) and other power-consuming elements 15 included in a single load group 11, in other words, the total transmitted power of the entire load group 11.

[0024] Here, the total power capacity of the load group 11, that is, the maximum value of the total transmitted power that can be sent to the load group 11 via the power equipment 12 (Pall_max), is predetermined. The power receiving control device according to this embodiment controls the element power received by the electric vehicle EV1 based on the constraint of the maximum value of the total transmitted power (Pall_max). For example, the power receiving control device controls the power received by the electric vehicle EV1 so that the current value of the total transmitted power (Pall_now) measured by the current measuring device 13 does not exceed the maximum value of the total transmitted power (Pall_max). Of course, the power received by the electric vehicle EV1 may also be controlled to allow the current value of the total transmitted power (Pall_now) to temporarily exceed the maximum value of the total transmitted power (Pall_max).

[0025] As shown in Figure 1, in the first embodiment, the differential information transmission device 14 is wirelessly or wiredly connected to each of the power equipment 12, the current measuring device 13, and the electric vehicle EV1. The power equipment 12 transmits an electrical signal indicating the maximum value (Pall_max) of the total transmitted power to the differential information transmission device 14. The current measuring device 13 transmits an electrical signal indicating the current value (Pall_now) of the measured total transmitted power to the differential information transmission device 14.

[0026] The differential information transmission device 14 comprises a calculation unit 31 and a transmission unit 32. The calculation unit 31 calculates the first differential power (△P) by subtracting the current value of the total transmitted power (Pall_now) from the maximum value of the total transmitted power (Pall_max), as shown in equation (1). The transmission unit 32 transmits (broadcasts) an electrical signal indicating the first differential power (△P) to all electric vehicles (EV1, EV2, EV3, ...) included in the load group 11 via mobile communication.

[0027]

number

[0028] The electrical signal indicating the first differential power (ΔP) is received by the receiving device 21 and transferred to the computing device 23. This allows the power receiving control device to acquire information indicating the first differential power (ΔP).

[0029] The differential information transmission device 14 uses its transmission unit 32 to transmit (broadcast) information indicating the first differential power (ΔP) to the receiving devices 21 of all electric vehicles (EV1, EV2, EV3, ...) included in the load group 11 via wireless communication. Alternatively, wired communication may be used to transmit the information indicating the first differential power (ΔP).

[0030] The differential information transmission device 14 may be, for example, a server connected to the power equipment 12, the current measuring device 13, and the load group 11 via a computer network. Alternatively, the differential information transmission device 14 may be configured as part of the power equipment 12.

[0031] The vehicle status acquisition device 22 acquires information indicating the required charge amount (Ereq), which is the amount of electricity that the electric vehicle EV1 needs to charge. The required charge amount (Ereq) can be calculated, for example, from the target value (SOCgoal) of the battery 25's charge rate. The required charge amount (Ereq) is the amount of charge needed to achieve the target value (SOCgoal) of the battery 25's charge rate, based on the current value (SOCnow) of the battery 25 (energy storage element). The vehicle status acquisition device 22 may also calculate the required charge amount (Ereq) by acquiring the target value (SOCgoal) of the charge rate and the current value (SOCnow) of the battery 25's charge rate.

[0032] The target value of the charging rate (SOCgoal) may be a value actually set by the user using an information communication terminal such as a smartphone or a user interface installed in the electric vehicle EV1. Or, when there is no specific instruction or setting from the user, it may be a value estimated from statistical data obtained by investigating the user's past behavior history (such as the setting history of the past target value (SOCgoal)). Or, when there is no specific instruction or setting from the user, the target value (SOCgoal) may be set to 100% (fully charged).

[0033] The current value of the charging rate of the battery 25 (SOCnow) is, for example, the value of the charging rate of the battery 25 measured by the vehicle state acquisition device 22.

[0034] In addition, the vehicle state acquisition device 22 acquires information indicating the remaining chargeable time (Tleave), which is the remaining time during which the battery 25 of the electric vehicle EV1 can be charged. The chargeable time (Tleave) can be calculated from the time when the electric vehicle EV1 finishes power reception (the end time of power reception T d ).

[0035] The "end time of power reception (T d )" means the time when the period during which the electric vehicle EV1 can continue power reception ends, and is distinguished from the time when it is determined not to continue power reception (NO in S103) in the power reception control flow (Figure 4).

[0036] The end time of power reception (T d ) may be a time actually set by the user using an information communication terminal such as a smartphone or a user interface installed in the electric vehicle EV1. Or, when there is no specific instruction or setting from the user, it may be a time estimated from statistical data obtained by investigating the user's past behavior history (such as the history of past departure times).

[0037] The calculation device 23 divides the required charge amount (Ereq) by the chargeable time (Tleave) to obtain the output control threshold value L as shown in equation (2). t+1Calculate the output control threshold (P). t+1 ) represents the minimum value (threshold) of the first element's power required to charge the required amount of charge (Ereq) within the available charging time (Tleave).

[0038]

number

[0039] The calculation device 23 calculates the priority (β) of electric vehicle EV1, which indicates the degree to which its own power reception is prioritized over the power reception of other electric vehicles (EV2, EV3, ...). For example, the calculation device 23 calculates the priority (β) using equation (3). In equation (3), N represents the total number of electric vehicles receiving power within load group 11. Note that the method for calculating the priority (β) is not limited to this.

[0040]

number

[0041] The total number of electric vehicles (N) may be statistical data (quantitative data) obtained by investigating the past power reception history of the load group 11, or it may be possible to estimate the approximate total number of electric vehicles (N) from the current value of the total transmitted power (Pall_now). The total number (N) is transmitted via broadcast from the differential information transmission device 14 or a device attached to the differential information transmission device 14, similar to the first differential power (△P). Alternatively, the total number (N) may be identified using location information or identification signals of the charging system.

[0042] The computing device 23 determines that the first differential power (ΔP) is less than or equal to a preset margin (ΔPmargin), and that the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t Determine whether the first condition, that it is greater than ), is met.

[0043] The state in which the first differential power (△P) is less than or equal to the margin (△Pmargin) means that the current value of the total transmitted power (Pall_now) sent to the load group 11 via the power equipment 12 is less than or equal to the maximum value of the total transmitted power (Pall_max) that can be sent to the load group 11 via the power equipment 12. Also, the first element received power (P) in the previous processing cycle t ) is the output control threshold (L) in the previous processing cycle. t A state greater than ) is when the first element power received (P) in the previous processing cycle. t ) is the output control threshold (L) required to charge the required amount of charge (Ereq) within the available charging time (Tleave). t This means having a surplus of resources.

[0044] The computing device 23 determines that the first differential power (ΔP) is less than or equal to a preset margin (ΔPmargin), and that the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t If the first condition that it is greater than (4) is met, then the first element power received (P) is calculated based on the first equation shown in equation (4). t+1 ) Update.

[0045]

number

[0046] In this case, the computing device 23 calculates the first element differential power (β·(△Pmargin-△P)) by multiplying the second differential power (△Pmargin-△P), which is obtained by subtracting the first differential power (△P) from the margin (△Pmargin), by the priority (β), as shown in equation (4), and the first element power received (P) in the previous processing cycle. t By subtracting the first element differential power (β·(△Pmargin-△P)) from ), the first element received power (P t+1 ) Update.

[0047] On the other hand, the computing device 23 considers the case where the first condition is not met, that is, when the first differential power (△P) is greater than the margin (△Pmargin), or when the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t )In the following cases, the first element power received (P) is calculated based on the second equation shown in equation (5). t+1 ) Update.

[0048] The state in which the first differential power (△P) is greater than the margin (△Pmargin) means that the current value of the total transmitted power (Pall_now) sent to the load group 11 via the power equipment 12 has a margin over the maximum value of the total transmitted power (Pall_max) that can be sent to the load group 11 via the power equipment 12. Also, the first element received power (P) in the previous processing cycle t ) is the output control threshold (L) in the previous processing cycle. t The following states refer to the first element power received (P) in the previous processing cycle. t ) is the output control threshold (L) required to charge the required amount of charge (Ereq) within the available charging time (Tleave). t This means a state where there is no leeway in relation to ).

[0049]

number

[0050] In this case, the computing device 23 calculates the second element differential power (β△P) by multiplying the first differential power (△P) by the priority (β), as shown in equation (5), and the first element power received (P) in the previous processing cycle. t By adding the second element differential power (β△P) to the first element received power (P t+1 ) Update.

[0051] The calculation device 23 calculates the element power received by the power receiving device 24 after the update (P t+1The system sends an instruction signal to the power receiving device 24 to receive the updated element power (P t+1 The power is received via the power equipment 12.

[0052] The power receiving control device repeatedly executes a "processing cycle" including the processing steps (a) to (g) at a fixed period, thereby controlling the power received by the power receiving device 24 of the electric vehicle EV1 (first element power P). t ) to control.

[0053] Referring to the flowchart in Figure 2, an example of a power receiving control method using the power receiving control device in Figure 1 will be explained. Those skilled in the art will easily understand the specific procedures of the power receiving processing method using the power receiving control device from the description of the specific configuration and functions of the power receiving control device in Figure 1. Therefore, here, as a power receiving processing method using the power receiving control device in Figure 1, the main processing operations of the power receiving control device will be explained, and detailed explanations of the processing operations will be omitted as they will overlap with the explanation referring to Figure 1.

[0054] First, in step S101, the receiving device 21 acquires information indicating the first differential power (△P) calculated by the calculation unit 31.

[0055] The process proceeds to step S102, where the vehicle status acquisition device 22 acquires information indicating the required charge amount (Ereq), which is the amount of electricity required by the electric vehicle EV1.

[0056] The process proceeds to step S103, where the vehicle status acquisition device 22 acquires information indicating the remaining time that the power receiving element can be charged, which is the chargeable time (Tleave).

[0057] The process proceeds to step S104, where the computing device 23 calculates the output control threshold (L) by dividing the required charge amount (Ereq) by the charging time (Tleave). t+1 Calculate ).

[0058] The process proceeds to step S105, where the power receiving control device determines whether or not to continue receiving power. For example, if it receives a power receiving termination instruction signal from the user of the electric vehicle EV1 (NO in S105), or if the current time is the power receiving termination time (T d If the following conditions are met, the power supply will be terminated. Alternatively, if the charging port is detected as unconnected (NO in S105), the power supply will be terminated because there is a high probability that the electric vehicle EV1 will start moving within a few minutes. Furthermore, if the state of charge (SOC) of battery 25 reaches the target value (NO in S105), the power supply will be terminated. If none of these conditions are met (YES in S105), the power supply control device will proceed to step S106 in order to continue power supply.

[0059] In step S106, the computing device 23 calculates the priority (β) of the electric vehicle EV1 using equation (3).

[0060] The process proceeds to step S107, where the computing device 23 determines whether the first differential power (△P) is less than or equal to a preset margin (△Pmargin). If the first differential power (△P) is less than or equal to a preset margin (△Pmargin) (YES in S107), the process proceeds to step S108, where the computing device 23 calculates the first element power received (P) in the previous processing cycle. t ) is the output control threshold (L) in the previous processing cycle. t It is determined whether the first differential power (△P) is greater than the preset margin (△Pmargin) (NO in S107), then the process proceeds to step S110.

[0061] In step S108, the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t If it is greater than (YES in S108), proceed to step S109, where the calculation device 23 uses the first equation shown in equation (4) to calculate the first element power received (P t+1 ) is updated. Meanwhile, the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle.t If the following applies (NO in S108), proceed to step S110.

[0062] In step S110, the calculation device 23 uses the second equation shown in equation (5) to calculate the first element power received (P t+1 ) Update.

[0063] Proceed to step S111, where the calculation device 23 calculates the updated first element power (P) of the power receiving device 24. t+1 The power receiving device 24 is controlled to receive power from the )

[0064] The power receiving control device repeatedly executes a processing cycle consisting of steps S101 to S111 until it is determined to be NO in step S105, thereby determining the first element power received (P t ) to control.

[0065] (Simulation results) Next, we will explain the results of a simulation in which power receiving control was performed according to the power receiving control method of the first embodiment.

[0066] First, the simulation conditions for the first embodiment will be explained. Each of the three electric vehicles (EV1, EV2, EV3) will perform power reception control according to the power reception control method related to the first embodiment. The maximum total power transmission power (Pall_max) that can be sent to the three electric vehicles (EV1, EV2, EV3) via the power equipment 12 is 6kW.

[0067] A first example of the simulation of the first embodiment will be explained using Figures 3A to 3C. Figure 3A is a stacked line graph showing a first example of the first element power received by each electric vehicle. In Figure 3A, P1 to P3 represent the first element power received by each electric vehicle EV1 to EV3.

[0068] In Figure 3A, the start time for electric vehicle EV1 is approximately 8:00 AM, and the end time is approximately 6:00 PM. The start time for electric vehicle EV2 is approximately 8:30 AM, and the end time is approximately 4:30 PM. The start time for electric vehicle EV3 is approximately 9:00 AM, and the end time is approximately 2:00 PM. In other words, the available charging time (Tleave) increases in the order of electric vehicle EV1, electric vehicle EV2, and electric vehicle EV3.

[0069] Figure 3B is a graph showing the first element power received and output control threshold for each electric vehicle in Figure 3A. Pt1 to Pt3 represent the first element power received for each of the electric vehicles EV1 to EV3, and L1 to L3 represent the output control thresholds for each of the electric vehicles EV1 to EV3.

[0070] In the first example, the computing device 23 of each electric vehicle determines whether the first condition is met in each processing cycle. If the first condition is met, the first power received by the first element (P) is calculated using the first equation shown in equation (4). t+1 ) is updated. On the other hand, if the first condition is not met, the second equation shown in equation (5) is used to calculate the first element power received (P t+1 ) Update.

[0071] In other words, each electric vehicle has a first differential power (ΔP) that is less than or equal to the margin (ΔPmargin), and the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t Based on whether it is greater than (whether the first condition is met), the first element power received (P) is calculated using the first equation. t+1 ) can be reduced, or the second equation can be used to calculate the first element received power (P t+1 The system adjusts the first element power received by itself by increasing the following:

[0072] Figure 3C is a graph showing the required charge amount for each electric vehicle in Figure 3A. Ereq1 to Ereq3 represent the required charge amount for each electric vehicle EV1 to EV3. As a result of each electric vehicle performing the power receiving control as shown in Figure 3B, the required charge amount for each electric vehicle became zero by the end of their respective power receiving time, as shown in Figure 3C. In other words, in the first example, each electric vehicle was able to reach full charge by the end of its power receiving time.

[0073] Next, a second example of the simulation of the first embodiment will be described using Figures 4A to 4C. Figure 4A is a stacked line graph showing a second example of the first element power received by each electric vehicle. In Figure 4A, P1 to P3 represent the first element power received by each electric vehicle EV1 to EV3. In the second example, the amount of charge required by each electric vehicle at the start of charging is assumed to be the same as the amount of charge required by each electric vehicle at the start of charging in the first example.

[0074] In Figure 4A, the start time for electric vehicle EV1 is approximately 8:00 AM, and the end time is approximately 3:00 PM. The start time for electric vehicle EV2 is approximately 8:30 AM, and the end time is approximately 3:00 PM. The start time for electric vehicle EV3 is approximately 9:00 AM, and the end time is approximately 2:00 PM. In other words, the available charging time (Tleave) increases in the order of electric vehicle EV1, electric vehicle EV2, and electric vehicle EV3.

[0075] Furthermore, the charging time (Tleave) for electric vehicles EV1 and EV2 in Figure 4A is shorter than the charging time (Tleave) for electric vehicles EV1 and EV2 in the first example shown in Figure 3A. Therefore, in the second example, electric vehicles EV1 and EV2 must charge the required amount in a shorter time than in the first example. Consequently, in Figure 4A, the current value of total transmitted power (Pall_now) is likely to be in a state where there is no margin for the maximum value of total transmitted power (Pall_max). In other words, the first differential power (△P), obtained by subtracting the current value of total transmitted power (Pall_now) from the maximum value of total transmitted power (Pall_max), is likely to be less than or equal to the margin (△Pmargin).

[0076] Figure 4B is a graph showing the first element power received and output control threshold for each electric vehicle in Figure 4A. Pt1 to Pt3 represent the first element power received for each of the electric vehicles EV1 to EV3, and L1 to L3 represent the output control thresholds for each of the electric vehicles EV1 to EV3.

[0077] In the second example, the computing device 23 of each electric vehicle performs the same processing as in the first example. Figure 4C is a graph showing the required charge amount for each electric vehicle in Figure 4A. Ereq1 to Ereq3 represent the required charge amount for each electric vehicle EV1 to EV3. As a result of each electric vehicle performing the power receiving control as shown in Figure 4B, the required charge amount for each electric vehicle became zero by the end of their respective power receiving time, as shown in Figure 4C. In other words, in the second example as well, each electric vehicle was able to reach full charge by the end of its power receiving time.

[0078] (Effects of the first embodiment) As described above, the first embodiment provides the following effects and advantages.

[0079] The power receiving control method and power receiving control device according to the first embodiment are in a situation where the current value (Pall_now) of the total transmitted power sent to the load group 11 via the power supply base point 10 does not have a margin over the maximum value (Pall_max) of the total transmitted power that can be sent to the load group 11 via the power supply base point 10, and the first element power received in the previous processing cycle (P t ) is the output control threshold (L) required to charge the required amount of charge (Ereq) within the available charging time (Tleave). t If there is a margin for the first element power received by the electric vehicle (P t+1 This allows the output control threshold (L) to be lowered when there is insufficient power supply capacity within the power system. t Within the range that satisfies ), the first element received power (P t+1 This can reduce the amount of energy stored by the power-consuming elements within the time desired by the user.

[0080] The power receiving control method and power receiving control device according to the first embodiment, when the current value (Pall_now) of the total transmitted power sent to the load group 11 via the power supply base point 10 has a margin over the maximum value (Pall_max) of the total transmitted power that can be sent to the load group 11 via the power supply base point 10, the power receiving element receives the first element power (P t+1 This allows the power supply capacity within the power system to be increased, so that each receiving element can increase the power supply capacity of the first element (P t+1 This can increase the amount of stored energy required by the power-consuming elements within the time desired by the user.

[0081] Furthermore, the power receiving control method and power receiving control device according to the first embodiment determine the first element power received (P) in the previous processing cycle. t ) is the output control threshold (L) required to charge the required amount of charge (Ereq) within the available charging time (Tleave). t If there is no margin for the power received by the receiving element, the first element power received by the receiving element (Pt+1 This can increase the first element power received (P t ) is the output control threshold (L t If there is insufficient margin for the output control threshold (L), each power receiving element will have an output control threshold (L t The first element power received (P) satisfies the following conditions. t+1 This can increase the amount of stored energy required by the power-consuming elements within the time desired by the user.

[0082] [Second Embodiment] A second embodiment to which the present invention is applied will be described below with reference to the drawings. In the drawings, the same parts are denoted by the same reference numerals, and detailed descriptions are omitted.

[0083] In the first embodiment, the computing device 23 determines if the first differential power (ΔP) is less than or equal to the margin (ΔPmargin), and if the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t Based on whether it is greater than or equal to the first element received power (P t+1 Switch between the first and second equations used to update ).

[0084] Therefore, in the first embodiment, as shown in Figure 5, the first element power received (P t+1 When updating the output control threshold (L t Near ), the first element received power (P) is calculated by alternately using the first and second equations. t+1) may be updated. Figure 5 is an enlarged graph of a part of Figure 3B. As shown in Figure 5, in the first embodiment, the first element power Pt3 of the electric vehicle EV3 is updated near the output control threshold L3 of the electric vehicle EV3 by alternately using the first and second equations, causing the first element power Pt3 to rise while repeatedly rising and falling in small increments across the output control threshold (L3). In this case, the first element power received by the electric vehicle EV3 within the charging time may exceed the required charge amount for the electric vehicle EV3. In addition, the supply of more power than necessary to the electric vehicle EV3 may cause a power shortage in the entire power system.

[0085] Therefore, in the second embodiment, the first element received power (P t , P t+1 ) and the output control threshold (L t , L t+1 Taking into more consideration the relationship with the first element, the power received by the first element (P t+1 ) Update.

[0086] The specific configuration and procedure of the power receiving control device and power receiving control method according to the second embodiment will be described below.

[0087] The configuration of the power receiving control device according to the second embodiment will be described. Compared with the power receiving control device according to the first embodiment shown in Figure 1, the power receiving control device according to the second embodiment has a first element power receiving power (P) calculated by the computing device 23. t+1 There are differences in the update process. The other configurations are the same as the power receiving control device shown in Figure 1. Therefore, we will focus on explaining the differences and omit further explanation of the identical parts.

[0088] The power receiving control device according to the second embodiment supplies electrical energy to a load group 11 including multiple electric vehicles (EV1, EV2, EV3, ...) via a power supply equipment 12, and the power received by electric vehicle EV1 included in the load group 11 is the first element power (P t This is controlled by repeating a predetermined processing cycle.

[0089] The "processing cycle" includes the processing steps (1) to (7). The processing steps (1) to (5) and (7) are the same as the processing steps (a) to (e) and (g) in the first embodiment. (1) The receiving device 21 obtains information indicating the first differential power (△P), which is obtained by subtracting the current value of the total power being sent to the load group 11 via the power equipment 12 (Pall_now) from the maximum value of the total power that can be sent to the load group 11 via the power equipment 12 (Pall_max). (2) The vehicle status acquisition device 22 acquires information indicating the required charge amount (Ereq), which is the amount of electricity required by the electric vehicle EV1, and the remaining chargeable time (Tleave), which is the remaining time during which the power receiving element can be charged. (3) The calculation device 23 calculates the output control threshold (L) by dividing the required charge amount (Ereq) by the charging time (Tleave). t+1 Calculate ). (4) The calculation device 23 calculates the priority (β) of electric vehicle EV1, which indicates the degree to which its own power reception is prioritized over the power reception of other electric vehicles (EV2, EV3, ...). (5) The computing device 23 determines that the first differential power (ΔP) is less than or equal to a preset margin (ΔPmargin), and that the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t Determine whether the first condition, that it is greater than ), is met. (6) If the first condition is met, the calculation device 23 uses the first formula to calculate the first element power received (P t+1 ) Update. On the other hand, of the first conditions, "the power received by the first element in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t If the condition "greater than" is not met, the computing device 23 determines whether the second condition described later is met. If the second condition is met, the computing device 23 determines the output control threshold (L) for the current processing cycle. t+1 The value of the first element received power (P t+1) is updated as. Also, among the first conditions, when the condition that "the first differential power (ΔP) is less than or equal to a preset margin (ΔPmargin)" is not satisfied, or when the second condition is not satisfied, the calculation device 23 determines whether the third condition described later is satisfied. Even when the third condition is satisfied, the calculation device 23 sets the value of the output control threshold (L t+1 ) in the current processing cycle as the first element received power (P t+1 ) is updated. Furthermore, when none of the above first to third conditions are satisfied, the calculation device 23 updates the first element received power (P t+1 ) using the second equation. (7) The calculation device 23 controls the electric vehicle EV1 to receive the updated element received power (P t+1 ).

[0090] In process (5), the calculation device 23 determines whether the first differential power (ΔP) is less than or equal to a preset margin (ΔPmargin) and whether the first element received power (P t ) in the previous processing cycle is greater than the output control threshold (L t ) in the previous processing cycle, that is, whether the first condition is satisfied.

[0091] In process (6), when the calculation device 23 determines that the first differential power (ΔP) is less than or equal to a preset margin (ΔPmargin) and the first element received power (P t ) in the previous processing cycle is greater than the output control threshold (L t ) in the previous processing cycle, that is, when the first condition is satisfied, the first element received power (P t+1 ) is updated using the first equation shown in equation (4).

[0092] Also, among the first conditions, the calculation device 23 determines that "the first element received power (P t ) in the previous processing cycle is greater than the output control threshold (L tIf the condition "greater than )" is not met, then it is determined whether the following second condition is met. The second condition is that the first differential power (△P) is zero or greater and less than or equal to a predetermined margin (△Pmargin), and the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t The condition is that it is equal to ). If the second condition is met, the computing device 23 calculates the output control threshold (L) for the current processing cycle. t+1 The value of the first element received power (P t+1 Update it as ).

[0093] Furthermore, if the first condition, "the first differential power (△P) is less than or equal to the preset margin (△Pmargin)," is not met, or if the second condition is not met, the calculation device 23 determines whether the following third condition is met. The calculation device 23 calculates the second element differential power (β△P) by multiplying the first differential power (△P) by the priority (β). Then, as shown in equation (6), the first element power received (P) in the previous processing cycle is calculated. t By adding the second element differential power (β△P) to the above, the second element received power (Q) is obtained. t+1 Calculate ).

[0094]

number

[0095] Subsequently, the computing device 23 determines whether the following third condition is met. The third condition is the power received by the first element (P) in the previous processing cycle. t ) is the output control threshold (L) in the previous processing cycle. t ) is smaller than and the second element received power (Q t+1 ) is the output control threshold (L) in this processing cycle. t+1 The condition is that it is greater than or equal to ). If the third condition is met, the computing device 23 also determines the output control threshold (L) for the current processing cycle. t+1 The value of the first element received power (Pt+1 Update it as ).

[0096] Then, if none of the first to third conditions are met, the calculation device 23 uses the second equation shown in equation (5) to calculate the first element power received (P t+1 ) Update.

[0097] The power receiving control device repeatedly executes a "processing cycle" including the processing steps (1) to (7) at a fixed period, thereby controlling the power received by the power receiving device 24 of the electric vehicle EV1 (first element power P). t+1 ) to control.

[0098] An example of a power receiving control method by a power receiving control device according to the second embodiment will be described with reference to the flowcharts in Figures 6A and 6B. Steps S201 to S206 and S215 in Figure 6A are the same as steps S201 to S106 and S111 in Figure 2, so their explanation will be omitted.

[0099] In step S207 of Figure 6A, the calculation device 23 determines whether the first differential power (△P) is less than or equal to a preset margin (△Pmargin). If the first differential power (△P) is less than or equal to a preset margin (△Pmargin) (YES in S207), the process proceeds to step S108, where the calculation device 23 calculates the first element power received (P) in the previous processing cycle. t ) is the output control threshold (L) in the previous processing cycle. t It is determined whether the first differential power (△P) is greater than the preset margin (△Pmargin) (NO in S207), then the process proceeds to step S212 in Figure 6B.

[0100] In step S208, the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t If it is greater than (YES in S208), proceed to step S209, where the calculation device 23 uses the first equation shown in equation (4) to calculate the first element power received (P t+1) is updated. Then proceed to step S215. Meanwhile, the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t )If the following occurs (NO in S208), proceed to step S210 in Figure 6B.

[0101] In step S210, the computing device 23 determines that the first differential power (ΔP) is zero or greater and the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t Determine whether it is equal to ). The first differential power (△P) is zero or greater AND the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t If it is equal to (YES in step S210), proceed to step S211, and the computing device 23 calculates the output control threshold (L) for the current processing cycle. t+1 The value of the first element received power (P t+1 ) is updated as . Then proceed to step S215 in Figure 6A. On the other hand, if the first differential power (△P) is less than zero, or if the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t If it is not equal to (NO in step S210), proceed to step S212.

[0102] In step S212, the computing device 23 calculates the second element differential power (β△P) by multiplying the first differential power (△P) by the priority (β). Then, using equation (6), it calculates the second element received power (Q). t+1 Calculate ).

[0103] Proceed to step S213, where the computing device 23 calculates the first element power received (P) in the previous processing cycle. t ) is the output control threshold (L) in the previous processing cycle. t ) is smaller than and the second element received power (Q t+1 ) is the output control threshold (L) in this processing cycle. t+1Determine whether it is greater than (P). The power received by the first element in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t ) is smaller than and the second element received power (Q t+1 ) is the output control threshold (L) in this processing cycle. t+1 If the value is greater than or equal to (YES in step S213), proceed to step S211, and the computing device 23 calculates the output control threshold (L) for the current processing cycle. t+1 The value of the first element received power (P t+1 ) is updated as . Then proceed to step S215 in Figure 6A. Meanwhile, the first element power received in the previous processing cycle (P t ) is the output control threshold (L) in the previous processing cycle. t ) or above, or the second element received power (Q t+1 ) is the output control threshold (L) in this processing cycle. t+1 If it is less than (NO in step S213), proceed to step S214, where the calculation device 23 uses the second equation shown in equation (5) to calculate the first element power received (P t+1 Update ). Then proceed to step S215 in Figure 6A.

[0104] The power receiving control device repeatedly executes a processing cycle consisting of steps S201 to S215 until it is determined to be NO in step S205, thereby determining the first element power received (P t ) to control.

[0105] (Simulation results) Next, an example of a simulation in which power receiving control is performed according to the power receiving control method of the second embodiment will be described. The simulation conditions of the second embodiment are the same as those in Figure 3A of the first embodiment.

[0106] Figure 7 is a graph showing an example of the first element power received and output control threshold for each electric vehicle in the second embodiment. Pt1 to Pt3 represent the first element power received for each of the electric vehicles EV1 to EV3. L1 to L3 represent the output control thresholds for each of the electric vehicles EV1 to EV3.

[0107] In Figure 3B, the computing device 23 of each electric vehicle, in each processing cycle, if the first condition is met, uses the first equation shown in equation (4) to calculate the first element power received (P t+1 ) is updated, and if the first condition is not met, the second equation shown in equation (5) is used to calculate the first element power received (P t+1 ) update the updated first element power reception (P t+1 ) received power.

[0108] In contrast, in Figure 7, the computing device 23 of each electric vehicle determines whether the first condition is met in each processing cycle. If the first condition is met, the first equation shown in equation (4) is used to calculate the first element power received (P t+1 ) is updated, and the updated first element power received (P t+1 ) receives power. On the other hand, if the first condition is not met, the computing device 23 determines whether the second or third condition is met. If the second or third condition is met, the output control threshold (L) for the current processing cycle is set. t+1 The value of the first element received power (P t+1 ) was updated as, and the updated first element power received (P t+1 ) receives power. Furthermore, if none of the first to third conditions are met, the calculation device 23 uses the second equation shown in equation (5) to calculate the first element received power (P t+1 ) is updated, and the updated first element power received (P t+1 ) receives power.

[0109] In other words, each electric vehicle uses the first equation to calculate the first element power received (P t+1 ) can be reduced, or the second equation can be used to calculate the first element received power (P t+1 In addition to increasing ), if the second or third condition is met, the output control threshold (L) in this processing cycle is also increased. t+1 The value of the first element received power (P t+1 It receives power as follows:

[0110] As a result of each electric vehicle performing the power reception control as shown in Figure 7, Figure 7 shows that the first element power reception power Pt1 to Pt3 of each electric vehicle was suppressed from updating the first element power reception power by alternately using the first and second equations near the output control thresholds L1 to L3 of each electric vehicle. This suppressed the first element power reception power Pt1 to Pt3 from rising while repeatedly rising and falling in small increments across the output control thresholds L1 to L3.

[0111] (Effects of the second embodiment) As described above, the second embodiment provides the following effects and advantages.

[0112] The power receiving control method and power receiving control device according to the second embodiment include the first element power receiving power (P) of each power receiving element. t+1 ) is the output control threshold (L t+1 This can suppress the rise while repeatedly rising and falling in small increments across the ) range. It can suppress the first element power received by each power receiving element within its chargeable time (Tleave) from exceeding the required charge amount for each power receiving element. It can suppress the overall power shortage of the power system caused by supplying more power than necessary to each power receiving element.

[0113] [Differentiation] In the first and second embodiments, the output control threshold (L t+1 The first element power (P) that an electric vehicle actually receives is calculated by dividing the required charge amount (Ereq) by the charging time (Tleave), as shown in equation (2). However, in actual power systems, when electrical energy is supplied from the power supply base point, power loss occurs due to resistance during transmission, etc. For this reason, the first element power (P) that an electric vehicle actually receives is calculated. t+1 ) is the output control threshold (L t+1) may fall below the required charge amount (Ereq) when the charging time (Tleave) has elapsed. For example, as shown in Figure 8, the first element power Pt actually received by the electric vehicle may fall below the output control threshold Lt due to power loss, and when the charging time (Tleave) has elapsed, the amount of energy P that has been charged may fall below the required charge amount Ereq by the amount of loss L.

[0114] Therefore, the calculation device 23 may calculate the required charge amount (Ereq) by dividing the value obtained by the charging time (Tleave) by the charging efficiency which takes into account the power loss when power is supplied from the power supply base point. Specifically, the calculation device 23 calculates the output control threshold (L) shown in equation (2). t+1 By dividing ) by the expected minimum power transmission efficiency (ηmin), the output control threshold (L t+1 ) may be calculated. Specifically, the calculation device 23 may use equation (7) instead of equation (2) to calculate the output control threshold (L t+1 You may calculate ).

[0115]

number

[0116] This allows the receiving element to actually receive the first element power (P t+1 ) is affected by power loss during transmission, which causes an output control threshold (L t+1 If the charge level falls below this level, and the charging time (Tleave) has elapsed, it can prevent the amount of charged power from reaching the required charge level (Ereq).

[0117] The embodiments and modifications described above are examples of ways in which the present invention can be implemented. Therefore, the present invention is not limited to the embodiments, modifications thereof, and examples described above, and it goes without saying that various modifications can be made to other forms as long as they do not depart from the technical spirit of the present invention, depending on the design and so on.

[0118] The power receiving control device according to the embodiment and its modifications can be implemented using a microcomputer equipped with a CPU (Central Processing Unit), memory, and an input / output unit. A computer program (power receiving control program) for enabling the microcomputer to function as a power receiving control device is installed on the microcomputer and executed. As a result, the microcomputer functions as one of the multiple information processing units provided by the power receiving control. Here, an example of implementing the power receiving control device using software is shown, but of course, it is also possible to configure the power receiving control device by preparing dedicated hardware for executing each information processing. Dedicated hardware includes devices such as application-specific integrated circuits (ASICs) or conventional circuit components arranged to perform the functions described in the embodiment, its modifications, or examples. Alternatively, the multiple information processing units included in the power receiving control device may be configured with separate hardware. The power receiving control device may also be used in conjunction with an electronic control unit (ECU) used for other vehicle-related controls. [Explanation of symbols]

[0119] 10 Power supply base point 11 Load group 12 Power equipment (power supply base) 15 Other power consumption elements (power receiving elements) EV1-EV3 Electric Vehicles (Energy Storage Components, Energy Receiving Components) Ereq Required Charge L t Output control threshold Pall_max: Maximum total transmission power Pall_now Current value of total transmitted power P t First element power received SOCgoal Target value for charge rate of energy storage elements SOCnow Current charge level of energy storage elements Tleave charging time β priority β·(△Pmargin-△P) First element differential power △P 1st differential power △Pmargin margin △Pmargin-△P Second differential power

Claims

1. In a power system that supplies electrical energy to a load group including multiple power receiving elements via a power supply base point, a power receiving control device mounted on the power receiving element controls the first element power, which is the power received by the power receiving element, by repeating a processing cycle, and is a method for controlling the power receiving of a power receiving element. The aforementioned processing cycle includes: Information is obtained showing a first differential power, which is obtained by subtracting the current value of the total power being sent to the load group via the power supply base point from the maximum value of the total power that can be sent to the load group via the power supply base point. Information is obtained indicating the required charge amount, which is the amount of power required by the power receiving element, and the remaining time that the power receiving element can be charged. The output control threshold is calculated by dividing the required charge amount by the charging time. If the first differential power is less than or equal to a preset margin, and the power received by the first element in the previous processing cycle is greater than the output control threshold in the previous processing cycle, The first element differential power of the power receiving element is calculated by multiplying the second differential power, obtained by subtracting the first differential power from the aforementioned margin, by the priority of the power receiving element, which indicates the degree to which its own power reception is prioritized over the power reception of other power receiving elements. The power received by the first element is updated by subtracting the differential power of the first element from the power received by the first element in the previous processing cycle. Control the power receiving device of the power receiving element to receive the updated power received by the first element. A method for controlling the power reception of a power receiving element, which includes the following.

2. The aforementioned processing cycle includes: If the first differential power is greater than a preset margin, The second element difference power is calculated by multiplying the first difference power by the priority, The power received by the first element is updated by adding the differential power of the second element to the power received by the first element in the previous processing cycle. A method for controlling the power reception of a power receiving element according to claim 1, characterized in that it includes the following:

3. The aforementioned processing cycle includes: If the power received by the first element in the previous processing cycle is less than or equal to the output control threshold in the previous processing cycle, The second element difference power is calculated by multiplying the first difference power by the priority, The power received by the first element is updated by adding the differential power of the second element to the power received by the first element in the previous processing cycle. A method for controlling the power reception of a power receiving element according to claim 1 or 2, characterized in that it includes the following:

4. The aforementioned processing cycle includes: If the first differential power is zero or greater and less than or equal to a preset margin, and the power received by the first element in the previous processing cycle is equal to the output control threshold in the previous processing cycle, The value of the output control threshold in this processing cycle is used as the first element powered power, and the first element powered power is updated. A method for controlling the power reception of a power receiving element according to claim 1, characterized in that it includes the following:

5. The aforementioned processing cycle includes: The second element difference power is calculated by multiplying the first difference power by the priority, The second element power is calculated by adding the second element differential power to the first element power received in the previous processing cycle. If the power received by the first element in the previous processing cycle was less than the output control threshold in the previous processing cycle, and the power received by the second element was equal to or greater than the output control threshold in the current processing cycle, The value of the output control threshold in this processing cycle is used as the first element powered power, and the first element powered power is updated. A method for controlling the power reception of a power receiving element according to claim 1 or 4, characterized in that it includes the following:

6. The output control threshold is calculated by dividing the required charge amount by the charging time, and then dividing that value by the charging efficiency, which takes into account power loss when power is supplied from the power supply base point. A method for controlling the power reception of a power receiving element according to any one of claims 1, 2, or 4.

7. In a power system that supplies electrical energy to a load group including multiple power receiving elements via a power supply base point, a power receiving control device for a power receiving element is mounted on the power receiving element and controls the first element power, which is the power received by the power receiving element, by repeating a processing cycle, The aforementioned processing cycle includes: Information indicating a first differential power is obtained by subtracting the current value of the total power being transmitted to the entire load group via the power supply base point from the maximum value of the total power that can be transmitted to the entire load group via the power supply base point. The required charge amount, which is the amount of power that the power receiving element needs to be charged, and the rechargeable time, which is the remaining time that the power receiving element can be charged, are obtained. By dividing the required charge amount by the charging time, the output control threshold, which is the threshold of power required to be supplied to the power receiving element per unit time, is calculated. If the first differential power is less than or equal to a preset margin, and the power received by the first element in the previous processing cycle is greater than the output control threshold in the previous processing cycle, The second differential power is calculated by subtracting the first differential power from the aforementioned margin. The first element differential power of the power receiving element is calculated by multiplying the second differential power by the priority of the power receiving element, which indicates the degree to which its own power reception is prioritized over the power reception of other power receiving elements. The power received by the first element is updated by subtracting the differential power of the first element from the power received by the first element in the previous processing cycle. Control the power receiving device of the power receiving element to receive the updated power received by the first element. A power receiving control device for a power receiving element that includes the following.

Images