Power control system, power supply method, and program

Abstract

To provide a technique to allow a plurality of devices to operate safely during power outage.SOLUTION: A power control system controls a plurality of power supply units that are supplied with power from a power supply and each have a motor. The plurality of power supply units are each provided with a storage battery. In a predetermined case in which supply of power from the power supply to the plurality of power supply units is stopped, the power control system controls supply and reception of power of the storage battery between the plurality of power supply units based on the operation pattern of the motors controlled by the power supply units.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a power control system, a power supply method, and a program. [Background technology]

[0002] Conventionally, in order to ensure the operation of a device (unit) during a power outage, a UPS (uninterruptible power supply) capable of supplying emergency power to the device is sometimes used. Patent Document 1 discloses a technology in which a UPS is provided for each device, and the UPS supplies and receives power to each other during a power outage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-140507 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, power is supplied and received according to the remaining battery charge of each UPS. For this reason, in Patent Document 1, for example, when the remaining battery charge of the UPS of a device is sufficient, but the device temporarily requires a large amount of power, it is not possible to supply sufficient power to the device. In other words, in the case of a device (unit) that drives an electric motor, where the power required by the device changes over time, the device cannot be operated (stopped) safely.

[0005] An object of the present invention is to provide a technique that enables each of a plurality of units that drive a motor to operate safely during a power outage or the like. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention employs the following configuration.

[0007] That is, a power control system according to one aspect of the present invention includes a plurality of power supply units, a power source that supplies power to the plurality of power supply units, and a first power supply path that electrically connects the plurality of power supply units, each of the plurality of power supply units including one or more motors, one or more power supply devices that convert the supplied power and supply it as load power for each of the one or more motors, and a second power supply path that is configured independently of the first power supply path and supplies power from the power source to the plurality of power supply devices. a storage battery connected to the second power supply path and configured to store power from the power source; and in a specified case where the supply of power from the power source to the plurality of power supply units is stopped, the storage battery supplies and receives power between the plurality of power supply units via the first power supply path based on the operation pattern of the one or more motors in each power supply unit.

[0008] According to this configuration, since power is supplied and received from the storage battery between the multiple power supply units based on the operation pattern of one or multiple motors, it is possible to supply sufficient power for safe operation (stop) even in a device (unit) whose required power changes over time. Therefore, during a power outage, etc., it is possible to safely operate the electric motor (and the load device connected to the electric motor) in each of the multiple power supply units.

[0009] In the power control system, the power supply unit supplies and receives power from the storage battery between the plurality of power supply units according to a result of comparing a first power based on the operation pattern and a second power that the storage battery can supply for each predetermined period, and the first power may be power required for the operation of the power supply unit. This makes it easy to determine which power supply units are temporarily short of power and which have a surplus of power, and therefore makes it possible to appropriately control the exchange of power between the plurality of power supply units.

[0010] In the power control system, in the predetermined case, during a period in which the first power is greater than the second power in a first power supply unit among the plurality of power supply units, the first power supply unit may receive power from a storage battery provided in another power supply unit among the plurality of power supply units. This makes it possible to supply power to a power supply unit that is temporarily short of power, and therefore allows the power supply unit to be operated (stopped) safely.

[0011] In the power control system, the first power may be power used to safely stop the one or more motors, whereby when a certain power supply unit lacks the power required to safely stop the one or more motors, the certain power supply unit can receive power from another power supply unit.

[0012] In the power control system, in the predetermined case, during a period in which the second power of a second power supply unit among the plurality of power supply units is greater than the first power, power may be supplied from a storage battery of the second power supply unit to the power supply unit among the plurality of power supply units whose first power is greater than the second power. This makes it possible for a power supply unit that has a surplus in its own required power to appropriately supply power to a power supply unit that requires power.

[0013] In the above power control system, in the predetermined case, during a period in which a motor controlled by a second power supply unit among the plurality of power supply units is stopped, power may be supplied from a storage battery of the second power supply unit to a power supply unit among the plurality of power supply units whose first power is greater than the second power. This makes it possible to appropriately supply power from a power supply unit that does not require power to a power supply unit that requires power.

[0014] The storage battery may further be capable of storing power supplied from the one or more power supply devices. In this way, even when the supply of power from a power source to the storage battery is stopped, the storage battery can store power from the one or more power supply devices, so that the storage battery can stably supply power for a long time even during a power outage.

[0015] The present invention may be understood as a device having at least a part of the above configuration, or as an electronic device, a control system, a power supply system, an information processing system, an information processing device, or a power control device. The present invention may also be understood as a control method, a power supply method, or a power control method including at least a part of the above processing. The present invention may also be understood as a program for realizing such a method, or a recording medium (storage medium) on which the program is non-temporarily recorded. Note that the above configurations and processing can be combined with each other as much as possible to constitute the present invention. Effect of the Invention

[0016] According to the present invention, even in the event of a power outage or the like, each of a plurality of units that drive a motor can be operated safely. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a configuration diagram of a power control system. [Diagram 2] FIG. 2 is a configuration diagram of the motor drive system. [Diagram 3]FIG. 3 is a diagram illustrating the flow of power between a plurality of power supply units. [Figure 4] FIG. 4 is a flowchart showing a control process for supplying and receiving electric power. [Diagram 5] 5A and 5B are time charts showing the operation pattern of the electric motor and the change over time in the power required by the power supply unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] <Application Examples> In the following, a power control system 1 that controls the power of the power supply units 20, each of which has a storage battery and drives one or more electric motors, will be described. The power control system 1 controls the supply and receipt of power (exchange of power) between the multiple power supply units 20, based on the power based on the operation pattern of the electric motors for each predetermined period and based on the power required for the operation of the power supply units 20. This allows the amount of power required by the power supply units 20 for each predetermined period to be appropriately determined based on the operation pattern of the motors, and allows the supply and receipt of power between the power supply units 20 to be appropriately determined according to the power. Therefore, even in a device (unit) such as the power supply unit 20, whose required power changes with time, it is possible to supply sufficient power to operate (stop) safely. Therefore, during a power outage, the multiple power supply units 20 can safely operate the electric motors (and the load devices connected to the electric motors).

[0020] [Power control system configuration] The configuration of a power control system 1 will be described with reference to Fig. 1. The power control system 1 includes a motor drive system 2 and a control device 10.

[0021] The motor drive system 2 is a system for driving an electric motor (motor). The motor drive system 2 includes power supply units 20A to 20C, a power source 30, and a power supply path 40. The number of power supply units does not need to be three, and may be any number equal to or greater than two.

[0022] Each of the power supply units 20A to 20C controls the driving of a plurality of electric motors using power from a power source 30 or power from a storage battery. The power source 30 supplies AC power to the power supply units 20A to 20C via a power supply path 40. The power supplied by the power source 30 does not need to be AC ​​power, and may be DC power. The power supply units 20A to 20C can also supply power to each other via the power supply path 40. The converters 210A, 210B, and 210C included in each of the power supply units 20A to 20C are connected in sequence in a daisy chain via the power supply path 40. The power supply units 20A to 20C do not need to be connected in a daisy chain, and may be connected by any connection method, as long as they can supply power to each other via the power supply path 40.

[0023] The control device 10 controls the supply and reception (transmission and reception) of power between the power supply units 20A to 20C. The control device 10 includes a CPU (processor) for executing a program for controlling the supply and reception of power, and a storage medium (recording medium) for non-temporarily storing the program.

[0024] Next, the detailed configuration of the power supply units 20A to 20C will be described with reference to FIG. 2. The configuration of the power supply unit 20A will be described below, but the power supply units 20B and 20C also have the same configuration as the power supply unit 20A. The power supply unit 20A includes a converter 210A, a storage battery 220A, inverters 231A to 238A, motors 241A to 248A, and circuit breakers 251A to 253A. The power supply unit 20A includes a load power supply path 260A that is configured independently of the power supply path 40 inside the power supply unit 20A and transmits power between each component (each element). In this way, an alphabet is added to the end of the reference character, such as "A" for the storage battery 220A, to indicate which power supply unit the character belongs to. On the other hand, a character not having an alphabet indicates that the character may be included in any power supply unit.

[0025] The number of inverters and motors does not need to be 8, and may be any number equal to or greater than 1. Also, Fig. 2 shows an example of the power supply units 20A to 20C, and the power supply units 20A to 20C may include other elements.

[0026] Converter 210A transforms the power from power source 30 (power supply path 40) into a suitable voltage and outputs it to load power supply path 260A. By employing such a configuration, it is possible to stabilize the power supply for driving inverters 231A to 238A.

[0027] The storage battery 220A is connected to the load power supply path 260A, and can store power from the power source 30 (converter 210A). The storage battery 220A can supply power to each of the inverters 231A to 238A. The storage battery 220A can also supply power to the power supply units 20B and 20C. The storage battery 220A can also receive regenerative power from the inverters 231A to 238A and use it for power storage. The storage battery 220A can store any power supplied via the load power supply path 260A (i.e., power supplied from the load power supply path 260A).

[0028] The inverters 231A-238A are power supply devices that control the electric motors 241A-248A by generating AC power of a frequency used by the electric motors 241A-248A from the input electric power. The electric motors 241A-248A drive the load devices according to their respective operation patterns by converting electric power (electrical energy) into mechanical energy (obtaining torque). For this reason, the inverters 231A-238A supply the load power of each of the multiple load devices to the electric motors 241A-248A.

[0029] The circuit breakers 251A-253A can cut off the current flow in the wiring (part of the load power supply path 260A) to which they are connected. Here, the circuit breakers 251A-253A are controlled by the control device 10 to control the current flow (power supply / reception) in the power supply unit 20A. The circuit breaker 251A controls the current flow between the converter 210A and the outside of the power supply unit 20A. The circuit breaker 252A controls the current flow between the converter 210A and the storage battery 220A, and the inverters 231A-238A. The circuit breaker 253A controls the current flow between the storage battery 220A, the converter 210A, and the inverters 231A-238A.

[0030] In this way, the converter 210A and the inverters 231A to 238A, including the load power supply path 260A, are unitized as an integrated unit as the power supply unit 20A. By unitizing the components from the converter 210A to the inverters 231A to 238A in this way, it is possible to easily handle the converter 210A, the load power supply path 260A, and the inverters 231A to 238A. In particular, when there are a large number of inverters as shown in FIG. Since the number of power cables connecting each of the inverters 231A to 238A and the converter 210A increases when the number of inverters is increased (eight units), the wiring work for the power supply in the power control device 1 becomes extremely easy by unitizing the units. This is an extremely useful effect that can reduce the burden of the installation work and prevent installation errors as much as possible.

[0031] [Power supply and receipt flow] Here, with reference to FIG. 3, an example of the flow of power supply and reception when the power supply from the power source 30 is stopped (during a power outage) will be described.

[0032] When the power supply from the power source 30 stops, the control device 10 controls the supply and receipt of power according to the power required for the power supply units 20A-20C to operate and the supply capacity of the storage batteries 220A-220C, through the process shown in the flowchart in Fig. 4, which will be described later. The flow of power when power is supplied from the power supply unit 20A to the power supply unit 20C will be described below.

[0033] First, as shown in Fig. 3, circuit breaker 252A cuts off the current to prevent power from being supplied from storage battery 220A to inverters 231A to 238A. Then, circuit breaker 251B cuts off the current to prevent power from being supplied from storage battery 220A to power supply unit 20B. Furthermore, circuit breaker 253C cuts off the current to prevent power from being supplied from storage battery 220A to storage battery 220C. This allows power from storage battery 220A to be supplied to inverters 231C to 238C via power supply path 40.

[0034] [Control of power supply and receipt] Next, the control process of power supply and reception (power exchange) by the control device 10 will be described with reference to the flowchart of Fig. 4 and the timing charts of Fig. 5A and Fig. 5B. Fig. 5A and Fig. 5B show the operation patterns of the electric motors 241-248 and the change over time in the power P1 required by the power supply unit 20 when the supply of power from the power source 30 is stopped at time t1. The process of determining the units to which power is supplied from the power supply units 20A-20C and the units to which power is received will be described below.

[0035] 4 is executed for each of the power supply units 20A-20C at predetermined intervals when the supply of power from the power source 30 is stopped. Specifically, the process according to the flowchart in Fig. 4 is executed in each of the periods from time t1 to t2, from time t2 to t3, from time t3 to t4, ..., and from time t9 to t10. In the following, only the case where the control device 10 controls the power supply unit 20A will be described, but the same applies to the cases where the control device 10 controls the power supply units 20B and 20C.

[0036] In step S1001, the control device 10 calculates the electric power P1 required by the power supply unit 20A. Here, the electric power P1 may be the electric power required for the operation of the power supply unit 20A. Specifically, the electric power P1 may be the electric power required for the electric motors 241A-248A to safely stop.

[0037] The control device 10 can calculate the power P1 according to the operation pattern (operation pattern until safely stopped) of the electric motors 241A-248A of the power supply unit 20A. Here, the electric power required by each of the electric motors 241A-248A can be determined according to how the electric motor needs to operate. For example, if the amount of rotation of the electric motor 241A needs to increase, electric power according to the rotation speed and acceleration is required. On the other hand, if the amount of rotation of the electric motor 241A needs to be maintained, ideally no electric power is required.

[0038] Therefore, the control device 10 calculates the power required for safely stopping each of the electric motors 241A-248A according to the operation pattern as shown in Fig. 5A. Here, for example, a table showing the relationship between the acceleration of the electric motor and the power is created in advance, and the power required by the electric motor can be calculated from the acceleration of the electric motor appearing in the operation pattern by referring to the table. The control device 10 can then calculate the power P1 required by the power supply unit 20A by adding up the power required by each of the electric motors 241A-248A.

[0039] In addition, when calculating the electric power P1 required by the power supply unit 20A, the control device 10 may calculate the electric power P1 by adding the electric power consumed in the load power supply path 260A and the electric power consumed in other elements (such as a circuit breaker) to the electric power required for each of the electric motors 241A-248A. In addition, since the operation patterns of the electric motors 241A-248A are determined in advance before the supply of electric power from the power source 30 is stopped, the change over time of the electric power P1 shown in Fig. 5A and Fig. 5B can also be calculated in advance before the supply of electric power from the power source 30 is stopped. Therefore, the control device 10 may store information on the change over time of the electric power P1 shown in Fig. 5A and Fig. 5B in advance in a storage device or the like.

[0040] In step S1002, the control device 10 calculates the magnitude of the supply capacity P2 (supplyable power; output power) of the storage battery 220A, as represented by the dashed-dotted line in Fig. 5A. For example, the control device 10 calculates the magnitude of the supply capacity P2 (supplyable power) of the storage battery 220A by communicating with a management section in the power supply unit 20A that manages the power of the storage battery 220A. The control device 10 may also calculate the supply capacity P2 based on the design specifications and operating time (degree of deterioration over time) of the storage battery 220A.

[0041] In step S1003, the control device 10 compares the power P1 required by the power supply unit 20A with the supply capacity P2 of the storage battery 220A. If the power P1 is greater than the supply capacity P2, the process proceeds to step S1004, and if the power P1 is equal to or less than the supply capacity P2, the process proceeds to step S1005. For example, in the period from time t4 to t5 shown in FIG. 5A, the power P1 is greater than the supply capacity P2 in the power supply unit 20A. On the other hand, in the period from time t2 to t3 shown in FIG. 5A and the period after time t5, the power P1 is equal to or less than the supply capacity P2 in the power supply unit 20A.

[0042] In step S1004, the control device 10 determines the power supply unit 20A as a unit that receives power from the other power supply units 20. In this case, the control device 10 cuts off the power supply in the circuit breaker 253A, similarly to the power supply unit 20C shown in FIG. 3. This makes it possible to supply power from the other power supply units 20 to the inverters 231A-238A of the power supply unit 20A. Note that the control device 10 does not necessarily need to cut off the power supply in the circuit breaker 253A, and may supply power from the storage battery 220A and the other power supply units 20 to the inverters 231A-238A without cutting off the power supply.

[0043] In step S1005, the control device 10 determines whether the power P1 required by the power supply unit 20A is 0. If the power P1 is 0, the process proceeds to step S1006, and if not, the process proceeds to step S1007. In the period after time t5 shown in FIG. 5A, the power P1 is 0 in the power supply unit 20A.

[0044] In step S1005, the control device 10 only needs to determine whether or not the power supply unit 20A has a margin for supplying power to other power supply units 20. Therefore, for example, the control device 10 may determine that the power P1 required by the power supply unit 20A is 0. Alternatively, the determination may be made based on whether the supply capacity P2 is greater than the power P1 by a predetermined value or more, or whether the supply capacity P2 is greater than the power P1 by a predetermined multiple (for example, 1.5 or 2 times), etc. Furthermore, it may be determined whether the supply capacity P2 is greater than the power P1 (the power required by the power supply unit 20A), and if the supply capacity P2 is greater than the power P1, the process proceeds to step S1006, and if not, the process proceeds to step S1007.

[0045] In step S1006, the control device 10 determines the power supply unit 20A as a unit that supplies power to the other power supply units 20 (units whose power P1 is greater than the supply capacity P2). In this case, the control device 10 cuts off the power supply to the circuit breaker 252A, similar to the power supply unit 20A shown in Fig. 3. Note that the control device 10 does not necessarily need to cut off the power supply to the circuit breaker 252A, and may supply power from the storage battery 220A to the inverters 231A-238A without cutting off the power supply, and may supply the remaining power to the other power supply units 20.

[0046] In step S1007, the control device 10 determines the power supply unit 20A as the unit that supplies power to its own inverters 231A to 238A. In this case, the control device 10 cuts off the current flow in the circuit breaker 251A, similar to the power supply unit 20B shown in Fig. 3. As a result, all of the power from the storage battery 220 is supplied to the inverters 231A to 238A.

[0047] When the control process as shown in Fig. 4 is performed, for example, in the period from time t8 to t9, as shown in Fig. 5A, the power P1 of the power supply unit 20A is equal to or less than the supply capacity P2, and the power P1 is zero, so that the power supply unit 20A supplies power to the other power supply units 20. On the other hand, as shown in Fig. 5C, in the period from time t8 to t9, the power P1 of the power supply unit 20C is greater than the supply capacity P2, so that the power supply unit 20C receives power from the other power supply units 20. Therefore, in the period from time t8 to t9, power is supplied from the power supply unit 20A to the power supply unit 20C, as shown in Fig. 3. Therefore, even during a power outage, the multiple power supply units 20 can be operated safely.

[0048] There are cases where a plurality of power supply units 20 are determined as units that receive power from other units and / or a plurality of power supply units 20 are determined as units that supply power to other units. In this case, the control device 10 determines a combination of the power supply units 20 that supply power and the power supply units 20 that receive the power, so as to minimize the number of power supply units 20 that are still insufficient in power even after receiving power from other units. Then, the control device 10 ensures that power is supplied and received between the two power supply units 20 thus combined. Here, a known combinatorial optimization algorithm can be used.

[0049] As described above, since the operation patterns of the electric motors 241-248 are preset, the time change of the electric power P1 can be grasped according to the operation pattern before the supply of electric power from the power source 30 is stopped. The supply capacity of the storage battery 220 can also be grasped according to the model (design specifications) before the supply of electric power from the power source 30 is stopped. For this reason, information such as units that supply electric power to other units and units that receive electric power from other units in the multiple electric power supply units 20 during a certain period, and combinations of these units, may be set in advance before the supply of electric power from the power source 30 is stopped. The setting of this information is performed by the control device 10 so as to minimize the number of electric power supply units 20 that are still insufficient in electric power even when electric power is supplied from other units.

[0050] According to this embodiment, the control device 10 controls the power supply between the power supply units 20 for each predetermined period based on the power P1 based on the operation pattern and the supply capacity P2 of the storage battery 220. Therefore, in order to control electric motors that operate differently depending on the period, it is possible to appropriately supply and receive power from the storage battery even among a plurality of power supply units in which the required power changes depending on the period.

[0051] In this embodiment, a power supply unit 20 whose power P1 required by the power supply unit 20 is 0 supplies power to another power supply unit 20, but a power supply unit 20 in which all of the motors have already stopped may supply power to another power supply unit 20. This is because, if temporary power supply interruptions from the power source 30 due to instantaneous interruptions or the like are repeated and all of the motors have already stopped, there is no need to operate those motors again according to the operation pattern. For this reason, a power supply unit 20 in which all of the motors have already stopped does not need to supply power to its own inverter, and so may be determined to be a unit that supplies power with priority over other power supply units 20.

[0052] Furthermore, the control device 10 may control the supply and receipt of power between the multiple power supply units 20 based only on the power P1 based on the operation pattern of the electric motor, without considering the supply capacity P2 of the storage battery 220. For example, the control device 10 may perform control so that during a power outage, power is supplied from the storage battery 220 of the power supply unit 20 with the least power P1 to the power supply unit 20 with the most power P1 for each predetermined period.

[0053] The interpretation of the claims is not limited solely to the matters described in the embodiments. The interpretation of the claims also includes the scope of the claims that is described in such a way that a person skilled in the art can recognize that the problem to be solved by the invention can be solved, taking into account the common general technical knowledge at the time of filing.

[0054] (Appendix 1) The power supply system includes a plurality of power supply units (20), a power source (30) that supplies power to the plurality of power supply units (20), and a first power supply path (40) that electrically connects the plurality of power supply units (20), Each of the plurality of power supply units (20) One or more motors (241 to 248); one or more power supply devices (231 to 238) that convert the supplied power into load power for each of the one or more motors (241 to 248) and supply the converted power; a second power supply path (260) configured independently of the first power supply path (40) and supplying power from the power source (30) to the plurality of power supply devices (231-238); a storage battery (220) connected to the second power supply path (260) and configured to store power from the power source (30); Integral to the when the supply of electric power from the power source (30) to the plurality of electric power supply units (20) is stopped, electric power is supplied to and received from the storage battery (220) between the plurality of electric power supply units (20) via the first electric power supply path (40) based on an operation pattern of the one or more motors (241-248) in each of the electric power supply units (20); A power control system (1).

[0055] (Appendix 2) A power supply method in a power control system having a plurality of power supply units (20), a power source (30) that supplies power to the plurality of power supply units (20), and a first power supply path (40) that electrically connects the plurality of power supply units (20), comprising the steps of: Each of the plurality of power supply units (20) One or more motors (241 to 248); The supplied power is set as the load power of each of the one or more motors (241 to 248). One or more power supply devices (231 to 238) that convert and supply the power; a second power supply path (260) configured independently of the first power supply path (40) and supplying power from the power source (30) to the plurality of power supply devices (231-238); a storage battery (220) connected to the second power supply path (260) and configured to store power from the power source (30); Integral to the The power supply method includes: The power supply method comprises the step of supplying and receiving power from a storage battery (220) between the plurality of power supply units (20) via the first power supply path (40) based on an operation pattern of the one or more motors (241-248) in each power supply unit (20) in a predetermined case in which power supply from the power source (30) to the plurality of power supply units (20) is stopped.

[0056] (Appendix 3) A program for controlling a control device (10) of a power control system (1) having a plurality of power supply units (20), a power source (30) that supplies power to the plurality of power supply units (20), and a first power supply path (40) that electrically connects the plurality of power supply units (20), comprising: Each of the plurality of power supply units (20) One or more motors (241 to 248); one or more power supply devices (231 to 238) that convert the supplied power into load power for each of the one or more motors (241 to 248) and supply the converted power; a second power supply path (260) configured independently of the first power supply path (40) and supplying power from the power source (30) to the plurality of power supply devices (231-238); a storage battery (220) connected to the second power supply path (260) and configured to store power from the power source (30); Integral to the The program is provided to a control device (10) of the power control system (1), executing a step of controlling, in a predetermined case where the supply of power from the power source (30) to the plurality of power supply units (20) is stopped, to supply and receive power from the storage battery (220) between the plurality of power supply units (20) via the first power supply path (40) based on an operation pattern of the one or more motors (241-248) in each power supply unit (20); A program characterized by: [Explanation of symbols]

[0057] 1: power control system, 2: motor drive system, 10: control device, 20A~20C: power supply unit, 30: power supply, 40: Power supply path, 210A, 210B, 210C: Converter, 220A, 220B, 220C: Storage battery, 231A~238A, 231B~238B, 231C~238C: Inverter, 241A~248A, 241B~248B, 241C~248C: Electric motor, 251A~253A, 251B~253B, 251C~253C: Circuit breakers, 260A, 260B, 260C: Load power supply path

Claims

1. a power supply that supplies power to the plurality of power supply units and a first power supply path that electrically connects the plurality of power supply units to each other; Each of the plurality of power supply units is One or more motors; one or more power supply devices that convert the supplied power into load power for each of the one or more motors and supply the converted power; a second power supply path configured independently of the first power supply path and supplying power from the power source to the plurality of power supply devices; a storage battery connected to the second power supply path and configured to store power from the power source; Integral to the In a predetermined case where the supply of power from the power source to the plurality of power supply units is stopped, power is supplied to and received from the storage battery between the plurality of power supply units via the first power supply path based on an operation pattern of the one or more motors in each power supply unit. A power control system comprising:

2. supplying and receiving power from the storage battery between the plurality of power supply units according to a result of a comparison, in each power supply unit, between a first power based on the operation pattern and a second power that can be supplied by the storage battery for each predetermined period; The first power is power required for operation of a power supply unit.

2. The power control system according to claim 1 .

3. in the predetermined case, during a period in which the first power is greater than the second power in a first power supply unit among the plurality of power supply units, the first power supply unit receives power from a storage battery provided in another power supply unit among the plurality of power supply units; 3. The power control system according to claim 2.

4. The first power is power used to safely stop the one or more motors.

4. The power control system according to claim 2, wherein the power control system is a power supply system.

5. in the predetermined case, during a period in which the second power in a second power supply unit among the plurality of power supply units is greater than the first power, power is supplied from a storage battery of the second power supply unit to the power supply unit among the plurality of power supply units in which the first power is greater than the second power; 5. The power control system according to claim 2, wherein the power control system is a power supply system.

6. In the predetermined case, during a period in which a motor controlled by a second power supply unit among the plurality of power supply units is stopped, power is supplied from a storage battery of the second power supply unit to a power supply unit among the plurality of power supply units in which the first power is greater than the second power.

6. The power control system according to claim 2, wherein the power control system is a power supply system.

7. The storage battery is further capable of storing power supplied from the one or more power supply devices.

7. The power control system according to claim 1, wherein the power control system is a power supply system.

8. A power supply method in a power control system having a plurality of power supply units, a power source that supplies power to the plurality of power supply units, and a first power supply path that electrically connects the plurality of power supply units, the method comprising the steps of: Each of the plurality of power supply units is One or more motors; one or more power supply devices that convert the supplied power into load power for each of the one or more motors and supply the converted power; a second power supply path configured independently of the first power supply path and supplying power from the power source to the plurality of power supply devices; a storage battery connected to the second power supply path and configured to store power from the power source; Integral to the The power supply method includes: A power supply method comprising the step of supplying and receiving power from a storage battery between the plurality of power supply units via the first power supply path based on an operating pattern of the one or more motors in each power supply unit, in a specified case in which the supply of power from the power source to the plurality of power supply units is stopped.

9. A program for controlling a control device of a power control system having a plurality of power supply units, a power source for supplying power to the plurality of power supply units, and a first power supply path for electrically connecting the plurality of power supply units, the program comprising: Each of the plurality of power supply units is One or more motors; one or more power supply devices that convert the supplied power into load power for each of the one or more motors and supply the converted power; a second power supply path configured independently of the first power supply path and supplying power from the power source to the plurality of power supply devices; a storage battery connected to the second power supply path and configured to store power from the power source; Integral to the The program is provided to a control device of the power control system, executing a step of controlling, in a predetermined case where the supply of power from the power source to the plurality of power supply units is stopped, supplying and receiving power from the storage battery between the plurality of power supply units via the first power supply path based on an operation pattern of the one or more motors in each power supply unit; A program characterized by:

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