Information processing system and information processing method

Abstract

To provide an information processing system and method capable of determining whether changes in a power distribution facility are necessary from an energy-saving perspective.SOLUTION: The information processing system includes: a receiving unit that receives wiring diagram information of a power distribution facility; a transformer information acquisition unit that acquires information indicating one or more transformers included in a wiring diagram on the basis of the received wiring diagram information; a current information acquisition unit that acquires information indicating a current flowing through each of the one or more transformers included in the power distribution facility; a derivation unit that derives losses of the one or more transformers on the basis of the information indicating the one or more transformers and the information indicating the current flowing through each of the one or more transformers; a determination unit that determines whether or not changes in the power distribution facility is necessary on the basis of the derived losses; and an output unit that outputs a determination result regarding whether or not the changes in the power distribution facility is necessary.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an information processing system and an information processing method. [Background technology]

[0002] To conduct an energy-saving diagnosis of power distribution equipment, the experience and knowledge of an energy manager or a chief electrical engineer who has engaged in certain energy-saving activities is required, and the person must also have an understanding of the power distribution equipment of the customer.

[0003] A technology for managing energy consumption is known in relation to energy-saving diagnosis of power distribution facilities (see, for example, Patent Document 1). According to this technology, an energy management system having a monitoring and control system that collects data on energy consumption of multiple energy consuming facilities installed in a building to be managed and controls and monitors each of the facilities is provided with a management control device having: a rationality evaluation unit that acquires data from the monitoring and control system and evaluates the rationality of the energy usage state in the managed building based on management items related to energy supply to the building; and an improvement control execution unit that gives instructions to the monitoring and control system to control the energy consuming facilities so as to improve the evaluation by the rationality evaluation unit, and the monitoring and control system controls the energy consuming facilities based on the instructions from the management control device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-188167 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, in the case of small-scale customers or customers in industries or business types other than electricity-related, there are many cases where electrical engineers are outsourced, and energy-saving activities for distribution facilities tend not to progress. An object of the present invention is to provide an information processing system and an information processing method that can determine whether or not changes to power distribution equipment are necessary from the viewpoint of energy conservation. [Means for solving the problem]

[0006] (1) One aspect of the present invention is an information processing system comprising: a reception unit that receives wiring diagram information of a power distribution facility; a transformer information acquisition unit that acquires information indicating one or more transformers included in the wiring diagram based on the wiring diagram information received by the reception unit; a current information acquisition unit that acquires information indicating the current flowing through each of the one or more transformers included in the power distribution facility; a derivation unit that derives losses in one or more of the transformers based on the information indicating the one or more transformers acquired by the transformer information acquisition unit and the information indicating the current flowing through each of the one or more transformers acquired by the current information acquisition unit; a determination unit that determines whether or not a change to the power distribution facility is necessary based on the losses derived by the derivation unit; and an output unit that outputs the determination result made by the determination unit as to whether or not a change to the power distribution facility is necessary.

[0007] (2) In one aspect of the present invention, in the information processing system described in (1) above, the information indicating the transformer is iron loss and copper loss of the transformer.

[0008] (3) In one aspect of the present invention, in the information processing system described in (1) or (2) above, the derivation unit derives a first loss of one or more of the transformers and a second loss when at least one of the one or more of the transformers is eliminated, the determination unit determines whether or not to eliminate at least one of the one or more of the transformers based on the first loss and the second loss derived by the derivation unit, and the output unit outputs the determination result made by the determination unit as to whether or not to eliminate at least one of the one or more of the transformers.

[0009] (4) In one aspect of the present invention, in the information processing system described in (3) above, the determination unit determines to remove at least one of the one or more transformers when the first loss is greater than or equal to the second loss.

[0010] (5) In one aspect of the present invention, in the information processing system described in (1) or (2) above, the derivation unit derives a first loss of one or more of the transformers and a third loss when at least one transformer is added, the determination unit determines whether to add at least one transformer based on the first loss and the third loss derived by the derivation unit, and the output unit outputs the determination result of whether to add at least one transformer.

[0011] (6) In one aspect of the present invention, in the information processing system described in (1) above, the determining unit determines to add at least one transformer when the first loss is equal to or greater than the third loss.

[0012] (7) In one aspect of the present invention, in the information processing system described in (1) above, the information processing system further includes a voltage information acquisition unit that acquires information indicating the voltage of each of one or more of the transformers included in the distribution equipment, and the determination unit determines whether to change the taps in use of one or more of the transformers based on the information indicating the one or more transformers acquired by the transformer information acquisition unit and the information indicating the voltage of each of the one or more transformers acquired by the voltage information acquisition unit.

[0013] (8) In one aspect of the present invention, in the information processing system described in (1) above, the information processing system further includes a power factor information acquisition unit that acquires information indicating the power factor of each of one or more of the transformers included in the power distribution equipment, and the determination unit determines the capacity of a capacitor to improve the power factor based on the information indicating the one or more transformers acquired by the transformer information acquisition unit and the information indicating the power factor of each of the one or more transformers acquired by the power factor information acquisition unit.

[0014] (9) One aspect of the present invention is an information processing method executed by a computer, comprising the steps of: receiving wiring diagram information of a power distribution facility; acquiring information indicating one or more transformers included in the wiring diagram based on the wiring diagram information received in the receiving step; acquiring information indicating the current flowing through each of the one or more transformers included in the power distribution facility; deriving losses in one or more transformers based on the information indicating the one or more transformers and the information indicating the current flowing through each of the one or more transformers; determining whether or not a change to the power distribution facility is necessary based on the losses derived in the deriving step; and outputting a determination result of whether or not a change to the power distribution facility is necessary obtained in the determining step. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide an information processing system and an information processing method that can determine whether or not a change in power distribution equipment is necessary from the viewpoint of energy conservation. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram illustrating an example of the configuration of an energy management system 1 according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating an example of the configuration of an information processing system 100 included in an energy management system 1 according to the present embodiment. [Figure 3] FIG. 1 is a diagram illustrating an example of a wiring diagram of a power distribution facility. [Figure 4] FIG. 1 is a diagram illustrating an example of a wiring diagram of a power distribution facility. [Figure 5] 4 is a flowchart showing an example of the operation of the energy management system 1 according to the present embodiment. [Figure 6] FIG. 2 is a diagram illustrating an example of the configuration of an energy management system 5 according to a first modified example of the embodiment. [Figure 7] 1 is a diagram showing an example of the configuration of an information processing system 150 included in an energy management system 5 according to the present embodiment. [Figure 8]FIG. 10 is a diagram illustrating an example of the configuration of an energy management system 7 according to a second modification of the embodiment. [Figure 9] FIG. 1 is a diagram showing an example of the configuration of an information processing system 170 included in an energy management system 7 according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, an information processing system and an information processing method according to the present embodiment will be described with reference to the drawings. The embodiment described below is merely an example, and the embodiments to which the present invention is applied are not limited to the following embodiments. Note that in all drawings used to explain the embodiment, the same reference numerals are used for components having the same functions, and repeated explanations will be omitted. Furthermore, in this application, "based on XX" means "based on at least XX," and includes cases where it is based on other elements in addition to XX. Furthermore, "based on XX" is not limited to cases where XX is used directly, but also includes cases where it is based on XX that has been calculated or processed. "XX" is any element (for example, any information).

[0018] (Embodiment) (Energy Management System) 1 is a diagram showing an example of the configuration of an energy management system 1 according to this embodiment. The energy management system 1 includes a management device 20, an IoT (Internet of Things) device 50, and an information processing system 100. An example of the management device 20 and the IoT device 50 is included in a power distribution facility (not shown). The management device 20 and the IoT device 50 are connected, and the IoT device 50 and the information processing system 100 communicate via a network NW. The network NW includes, for example, the Internet, a wide area network (WAN), a local area network (LAN), a provider device, a wireless base station, and the like.

[0019] The management device 20 is realized by a device such as a personal computer, a server, a smartphone, a tablet computer, or an industrial computer. The management device 20 manages the power distribution facility. For example, the management device 20 measures the temperature of the power distribution facility and performs temperature control based on the temperature measurement results. Furthermore, for example, the management device 20 acquires information indicating the current flowing through one or more transformers included in the power distribution facility and transmits the information to the information processing system 100 via the IoT device 50. The IoT device 50 acquires the information indicating the current flowing through each of the one or more transformers transmitted by the management device 10, and transmits the information to the information processing system 100.

[0020] The information processing system 100 is realized by a device such as a personal computer, a server, a smartphone, a tablet computer, or an industrial computer. The information processing system 100 receives wiring diagram information of a power distribution facility and acquires information indicating one or more transformers included in the wiring diagram based on the received wiring diagram information. The information processing system 100 also acquires information indicating the current flowing through each of one or more transformers included in the power distribution facility from an IoT device 50.

[0021] The information processing system 100 derives losses in one or more transformers based on information indicating one or more transformers and information indicating currents (demand currents) flowing through each of the one or more transformers. The information processing system 100 determines whether or not a change to the power distribution equipment is necessary based on the derived losses, and outputs a determination result indicating whether or not a change to the power distribution equipment is necessary. The management device 20 and the information processing system 100 included in the energy management system 1 will be described in detail below.

[0022] (Management device 20) The management device 20 includes communication units 12-1 to 12-3, a temperature measurement unit 13, a storage unit 14, a calculation unit 15, a display unit 16, and a control unit 17. The communication units 12-1 to 12-3 are realized by communication modules. The communication units 12-1 to 12-3 communicate with external communication devices such as the IoT device 50. The communication units 12-1 to 12-3 communicate using a communication method such as a wired LAN.

[0023] The temperature measurement unit 13 measures the temperature of the power distribution facility in which the management device 20 is installed. The storage unit 14 is realized by a hard disk drive (HDD), flash memory, random access memory (RAM), read only memory (ROM), or the like, and stores information.

[0024] The calculation unit 15 acquires information indicating the temperature from the temperature measurement unit 13 and stores it in the storage unit 14. The calculation unit 15 also displays the information indicating the temperature on the display unit 16. The calculation unit 15 also determines whether the temperature is within a predetermined range, and if the temperature is not within the predetermined range, notifies the control unit 17 of the information indicating the temperature, and notifies the predetermined notification destination of information indicating that the temperature is not within the predetermined range from the communication unit 12-3 via the IoT device 50. Furthermore, the calculation unit 15 acquires information indicating the current flowing through each of one or more transformers included in the power distribution facility, and transmits the information to the information processing system 100 from the communication unit 12-3 via the IoT device 50.

[0025] The display unit 16 is, for example, a display, and may be configured to include a touch panel. When the control unit 17 is notified of the information indicating the temperature from the calculation unit 15, the control unit 17 controls the temperature of the power distribution facility based on the information indicating the temperature so that the temperature falls within a predetermined range.

[0026] The calculation unit 15 and the control unit 17 are realized by, for example, a hardware processor such as a CPU (Central Processing Unit) executing a computer program (software) stored in the storage unit 14.

[0027] Furthermore, some or all of these functional units may be realized by hardware (including circuitry) such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a GPU (Graphics Processing Unit), or may be realized by a combination of software and hardware.

[0028] The computer program may be stored in advance in a storage device such as a HDD or flash memory, or may be stored in a removable storage medium such as a DVD (Digital Versatile Disc) or CD-ROM, and installed by inserting the storage medium into a drive device.

[0029] (Information processing system 100) FIG. 2 is a diagram showing an example of the configuration of an information processing system 100 included in the energy management system 1 according to this embodiment. The information processing system 100 includes a communication unit 102 , a reception unit 103 , a transformer information acquisition unit 104 , a current information acquisition unit 105 , a derivation unit 106 , a determination unit 107 , an output unit 108 , and a storage unit 110 .

[0030] The communication unit 102 is realized by a communication module. The communication unit 102 communicates with an external communication device such as the IoT device 50 via the network NW. The communication unit 102 communicates using a wireless communication method such as wireless LAN, Bluetooth (registered trademark), or LTE (Long Term Evolution) (registered trademark). The communication unit 102 may also communicate using a communication method such as wired LAN. The communication unit 102 receives information transmitted by the IoT device 50 indicating the amount of power consumed by each of one or more transformers included in the power distribution facility.

[0031] The reception unit 103 receives wiring diagram information of the power distribution facility input by an operator OP of the information processing system 100. 3 is a diagram showing an example of a wiring diagram of a power distribution facility. The example of the wiring diagram of a power distribution facility includes wiring symbols representing power supply and demand instrument transformers (VCTs: Voltage and Current Transformers), wiring symbols representing disconnecting switches (DSs), wiring symbols representing vacuum insulated circuit breakers (VCBs), wiring symbols representing single-phase transformers T1φ1a to T1φ1c, and wiring symbols representing three-phase transformers T3φ3d to T3φ3f.

[0032] The transformer information acquisition unit 104 acquires wiring diagram information of the power distribution facility from the reception unit 103. Based on the acquired wiring diagram information of the power distribution facility, the transformer information acquisition unit 104 acquires information indicating one or more transformers included in the wiring diagram of the power distribution facility. Examples of the information indicating a transformer include no-load loss (iron loss) and load loss (copper loss).

[0033] For example, the transformer information acquisition unit 104 acquires, from the wiring diagram shown in Figure 2, information indicating the no-load loss TN1a and information indicating the load loss TL1a of the single-phase transformer T1φ1a, information indicating the no-load loss TN1b and information indicating the load loss TL1b of the single-phase transformer T1φ1b, and information indicating the no-load loss TN1c and information indicating the load loss TL1c of the single-phase transformer T1φ1c. Furthermore, the transformer information acquisition unit 104 acquires, from the wiring diagram shown in Figure 2, information indicating the no-load loss TN3d and information indicating the load loss TL3d of the three-phase transformer T3φ3d, information indicating the no-load loss TN3e and information indicating the load loss TL3e of the three-phase transformer T3φ3e, and information indicating the no-load loss TN3f and information indicating the load loss TL3f of the three-phase transformer T3φ3f.

[0034] The current information acquiring unit 105 acquires information indicating the current (demand current) flowing through each of one or more transformers transmitted by the IoT device 50. For example, the current information acquiring unit 105 acquires information indicating the current flowing through each of the single-phase transformers T1φ1a to T1φ1c and information indicating the current flowing through each of the three-phase transformers T3φ3d to T3φ3f.

[0035] The derivation unit 106 acquires information indicating one or more transformers from the transformer information acquisition unit 104. The derivation unit 106 acquires information indicating the current flowing through each of the one or more transformers from the current information acquisition unit 105. The derivation unit 106 derives the loss of the one or more transformers based on the acquired information indicating the one or more transformers and the information indicating the current flowing through each of the one or more transformers.

[0036] For example, the derivation unit 106 acquires information indicating the single-phase transformers T1φ1a to T1φ1c and information indicating the three-phase transformers T3φ3d to T3φ3f from the transformer information acquisition unit 104. The derivation unit 106 acquires information indicating the current flowing through each of the single-phase transformers T1φ1a to T1φ1c and information indicating the current flowing through each of the three-phase transformers T3φ3d to T3φ3f from the current information acquisition unit 105.

[0037] The derivation unit 106 derives the losses of the single-phase transformers T1φ1a through T1φ1c and the three-phase transformers T3φ3d through T3φ3f based on information indicating the single-phase transformers T1φ1a through T1φ1c and information indicating the three-phase transformers T3φ3d through T3φ3f, and information indicating the current flowing through each of the single-phase transformers T1φ1a through T1φ1c and information indicating the current flowing through each of the three-phase transformers T3φ3d through T3φ3f.

[0038] The determination unit 107 acquires information indicating the loss from the derivation unit 106, and determines whether or not the distribution equipment needs to be changed based on the acquired information indicating the loss. For example, the determination unit 107 may be configured to determine that the distribution equipment needs to be changed if the loss is greater than a preset threshold, and to determine that the distribution equipment does not need to be changed if the loss is equal to or less than the threshold.

[0039] The output unit 108 acquires the determination result as to whether or not a change in the power distribution facility is necessary from the determination unit 107, and outputs the acquired determination result. For example, the output unit 108 may output the determination result by displaying it on a display unit (not shown).

[0040] When the determination unit 107 determines that a change to the power distribution equipment is necessary, the derivation unit 106 derives a first loss of one or more transformers and a second loss when at least one of the one or more transformers is removed. For example, the derivation unit 106 derives the first loss of the single-phase transformer T1φ1a to T1φ1c and the three-phase transformer T3φ3d to T3φ3f in the wiring diagram of the power distribution equipment shown in Fig. 3. The derivation unit 106 also derives a second loss when at least one of the single-phase transformer T1φ1a to T1φ1c and the three-phase transformer T3φ3d to T3φ3f is removed in the wiring diagram of the power distribution equipment shown in Fig. 3. For example, the derivation unit 106 derives the second loss when the single-phase transformer T1φ1a and the three-phase transformer T3φ3d are eliminated.

[0041] The determination unit 107 determines whether to reduce at least one of the one or more transformers based on the first loss and the second loss derived by the derivation unit 106. For example, the determination unit 107 determines to reduce at least one of the one or more transformers when the first loss is equal to or greater than the second loss. This makes it possible for a consumer with multiple single-phase transformers and / or multiple three-phase transformers to automatically determine whether to reduce the number of transformers from the perspective of energy conservation based on historical demand current transition data.

[0042] Fig. 4 is a diagram showing an example of a wiring diagram of a power distribution facility. Fig. 4 shows the wiring diagram of the power distribution facility shown in Fig. 3, in which the single-phase transformer T1φ1a and the three-phase transformer T3φ3d have been removed. As shown in Fig. 4, in an example of a wiring diagram of the power distribution facility after the number of operating units has been reduced, for example, a load (not shown) that was connected to the single-phase transformer T1φ1a before the reduction in the number of operating units is connected to the single-phase transformer T1φ1b, and a load (not shown) that was connected to the three-phase transformer T3φ3d before the reduction in the number of operating units is connected to the three-phase transformer T3φ3d.

[0043] The output unit 108 outputs the determination result of the determination unit 107 as to whether or not to remove at least one of the one or more transformers. When outputting the determination result of the determination unit 107 to remove at least one of the one or more transformers, the output unit 108 may display the wiring diagram of the power distribution facility shown in Fig. 4 on a display unit (not shown).

[0044] Furthermore, when the determination unit 107 determines that a change to the power distribution equipment is necessary, the derivation unit 106 derives a first loss of one or more transformers and a third loss when at least one transformer is added. For example, the derivation unit 106 derives the first losses of the single-phase transformer T1φ1a to T1φ1c and the three-phase transformer T3φ3d to T3φ3f in the wiring diagram of the power distribution equipment shown in Fig. 3. The derivation unit 106 also derives a third loss when at least one of the single-phase transformer T1φ and the three-phase transformer T3φ is added to the single-phase transformer T1φ1a to T1φ1c and the three-phase transformer T3φ3d to T3φ3f in the wiring diagram of the power distribution equipment shown in Fig. 3.

[0045] The determining unit 107 determines whether to increase at least one of the one or more transformers based on the first loss and the third loss derived by the deriving unit 106. For example, the determining unit 107 determines to increase at least one transformer when the first loss is equal to or greater than the third loss.

[0046] The output unit 108 outputs the determination result of the determination unit 107 as to whether or not to increase at least one of the one or more transformers. When outputting the determination result of the determination unit 107 to increase at least one of the one or more transformers, the output unit 108 may display a wiring diagram of the power distribution facility on a display unit (not shown).

[0047] The reception unit 103, the transformer information acquisition unit 104, the current information acquisition unit 105, the derivation unit 106, the judgment unit 107 and the output unit 36 ​​are realized, for example, by a hardware processor such as a CPU executing a computer program (software) stored in the memory unit 110. Furthermore, some or all of these functional units may be realized by hardware (including circuitry) such as an LSI, ASIC, FPGA, or GPU, or may be realized by a combination of software and hardware.

[0048] (Operation of Energy Management System 1) 5 is a flowchart showing an example of the operation of the energy management system 1 according to this embodiment. The operation of the information processing system 100 will be described with reference to FIG. (Step S1-1) The receiving unit 103 receives wiring diagram information of the power distribution facility. (Step S2-1) The transformer information acquisition unit 104 acquires wiring diagram information of the power distribution facility from the reception unit 103, and acquires information about one or more transformers from the wiring diagram.

[0049] (Step S3-1) The current information acquisition unit 105 acquires information indicating the current flowing through each of one or more transformers included in the power distribution facility. (Step S4-1) The derivation unit 106 acquires one or more pieces of transformer information from the transformer information acquisition unit 104, and acquires information indicating the current flowing through each of the one or more transformers from the current information acquisition unit 105. The derivation unit 106 derives the loss of the one or more transformers based on the one or more pieces of transformer information and the information indicating the current flowing through each of the one or more transformers.

[0050] (Step S5-1) The determination unit 107 acquires information indicating losses in one or more transformers from the derivation unit 106. The determination unit 107 determines whether or not a change to the power distribution equipment is necessary from the viewpoint of energy conservation, based on the information indicating losses in one or more transformers. (Step S6-1) The output unit 108 outputs the determination result as to whether or not the distribution facility needs to be changed. In the flowchart shown in FIG. 5, the processing order of steps S1-1 and S1-2 may be reversed.

[0051] In the above-described embodiment, the determination unit 107 may be configured to include a trained model that has been machine-learned to determine the relationship between the wiring diagram information of the power distribution facility, information indicating the current flowing in each of one or more transformers included in the power distribution facility, and information indicating whether the power distribution facility needs to be modified. In this case, the determination unit 107 obtains the wiring diagram information of the power distribution facility from the reception unit 103, and obtains information indicating the current flowing in each of one or more transformers included in the power distribution facility from the current information acquisition unit 105. The determination unit 107 may input wiring diagram information of the power distribution facility and information indicating the current flowing through one or more transformers included in the power distribution facility to the trained model, and obtain information indicating whether the power distribution facility needs to be modified, output by the trained model. By configuring in this manner, the transformer information acquisition unit 104 and the derivation unit 106 can be omitted.

[0052] (Modification 1 of the embodiment) (Energy Management System) 6 is a diagram illustrating a configuration example of an energy management system 5 according to Modification 1 of the embodiment. The energy management system 5 differs from the energy management system 1 in that it includes a management device 25 instead of the management device 20 and an information processing system 150 instead of the information processing system 100.

[0053] (Management device 25) Management device 25 differs from management device 20 in that it includes a calculation unit 18 instead of calculation unit 15 . The calculation unit 15 can be applied to the calculation unit 18. However, the calculation unit 18 acquires information indicating the voltage of each of one or more transformers included in the power distribution facility and transmits it from the communication unit 12-3 to the information processing system 150 via the IoT device 50. When measuring the voltage of each of one or more transformers on the high-voltage side of the transformer, the voltage is the same, so there is only one measurement point on the high-voltage side. On the other hand, in the case of PF-S type (a type approved for transformers with a total capacity of 300 kVA or less), there is often no voltage measurement point on the high-voltage side, so there is a voltage measurement point on the secondary side of each transformer.

[0054] (Information processing system 100) FIG. 7 is a diagram showing an example of the configuration of an information processing system 150 included in the energy management system 5 according to this embodiment.

[0055] The information processing system 150 includes a communication unit 102 , a reception unit 103 , a transformer information acquisition unit 154 , a voltage information acquisition unit 155 , a determination unit 157 , an output unit 108 , and a storage unit 110 . The transformer information acquisition unit 154 acquires wiring diagram information of the power distribution facility from the reception unit 103. Based on the acquired wiring diagram information of the power distribution facility, the transformer information acquisition unit 154 acquires information indicating one or more transformers included in the wiring diagram of the power distribution facility. An example of the information indicating a transformer is the tap used by the transformer.

[0056] The voltage information acquisition unit 155 acquires information indicating the voltage of each of one or more transformers transmitted by the IoT device 50. For example, the voltage information acquisition unit 155 acquires information indicating the voltage of each of one or more transformers included in the power distribution facility.

[0057] The determination unit 157 obtains information indicating one or more transformers from the transformer information obtaining unit 154 and information indicating the voltage of each of the one or more transformers from the voltage information obtaining unit 155. The determination unit 157 determines whether to change (switch) the taps in use of the transformers based on the information indicating the one or more transformers and the information indicating the voltage of each of the one or more transformers. For example, if the tap in use of each of the one or more transformers included in the distribution facility is 6600V and the information indicating the voltage of each of the one or more transformers is 2.3% higher than the rated voltage, for example, if the rated voltage is 210V and the information indicating the voltage of each of the one or more transformers is 215V, or if the information indicating the voltage of the primary side of the transformer is 6700V, the determination unit 157 determines to switch the tap in use of each of the one or more transformers included in the distribution facility to 6750V. In other words, the determination unit 157 determines to switch to the tap with the voltage closest to the voltage of the primary side of each of the one or more transformers.

[0058] (Modification 2 of the embodiment) (Energy Management System) 8 is a diagram illustrating a configuration example of an energy management system 7 according to Modification 2 of the embodiment. The energy management system 7 differs from the energy management system 1 in that it includes a management device 27 instead of the management device 20 and an information processing system 170 instead of the information processing system 100.

[0059] (Management device 27) Management device 27 differs from management device 20 in that it includes a calculation unit 19 instead of calculation unit 15 . The calculation unit 19 can be the calculation unit 15. However, the calculation unit 19 acquires information indicating the power factor of each of one or more transformers included in the power distribution facility, and transmits the information from the communication unit 12-3 to the information processing system 150 via the IoT device 50.

[0060] (Information Processing System 170) FIG. 9 is a diagram showing an example of the configuration of an information processing system 170 included in the energy management system 7 according to this embodiment. The information processing system 170 includes a communication unit 102 , a reception unit 103 , a transformer information acquisition unit 174 , a power factor information acquisition unit 175 , a determination unit 177 , an output unit 108 , and a storage unit 110 .

[0061] The transformer information acquisition unit 174 acquires wiring diagram information of the power distribution facility from the reception unit 103. Based on the acquired wiring diagram information of the power distribution facility, the transformer information acquisition unit 174 acquires information indicating one or more transformers included in the wiring diagram of the power distribution facility. An example of the information indicating the transformers is the number of capacitors used and the space in which the capacitors are placed.

[0062] The power factor information acquisition unit 175 acquires information indicating the power factor of each of one or more transformers transmitted by the IoT device 50. For example, the power factor information acquisition unit 175 acquires information indicating the power factor of each of one or more transformers included in the power distribution facility.

[0063] The determination unit 177 obtains information indicating one or more transformers from the transformer information obtaining unit 174, and obtains information indicating the power factor of each of the one or more transformers from the power factor information obtaining unit 175. The determination unit 177 determines whether or not to improve the power factor based on the information indicating the power factor of each of the one or more transformers. If the determination unit 177 determines that the power factor should be improved, it determines the capacitance of a capacitor for improving the power factor based on the information indicating the one or more transformers. For example, when capacitors with different capacitances are applied, the determination unit 177 may select the capacitor that can improve the power factor the most.

[0064] According to the energy management system 1 of this embodiment, the information processing system 100 includes a reception unit 103 that receives wiring diagram information of the power distribution equipment, a transformer information acquisition unit 104 that acquires information indicating one or more transformers included in the wiring diagram based on the wiring diagram information received by the reception unit 103, a current information acquisition unit 105 that acquires information indicating the current flowing through each of the one or more transformers included in the power distribution equipment, a derivation unit 106 that derives losses in one or more transformers based on the information indicating the one or more transformers acquired by the transformer information acquisition unit 104 and the information indicating the current flowing through each of the one or more transformers acquired by the current information acquisition unit 105, a judgment unit 107 that determines whether or not the power distribution equipment needs to be changed based on the losses derived by the derivation unit 106, and an output unit that outputs the judgment result made by the judgment unit 107 as to whether or not the power distribution equipment needs to be changed.

[0065] With this configuration, the information processing system 100 can derive the losses of one or more transformers based on information indicating one or more transformers included in the wiring diagram and information indicating the current flowing through each of the one or more transformers included in the power distribution equipment, and determine whether or not changes to the power distribution equipment are necessary based on the derived losses. Using the transformer information obtained from the wiring diagram and the measured power information, it is possible to propose changing the equipment connections to reduce transformer losses, thereby allowing consumers to take appropriate measures.

[0066] In the information processing system 100, the information indicating the transformer is the iron loss and copper loss of the transformer. With this configuration, the information processing system 100 can derive the losses of one or more transformers based on information indicating the iron loss and copper loss of one or more transformers included in the wiring diagram and information indicating the current flowing through each of the one or more transformers included in the power distribution equipment, and can determine whether or not the power distribution equipment needs to be modified based on the derived losses, thereby allowing consumers to take appropriate measures.

[0067] In the information processing system 100, the derivation unit 106 derives a first loss of one or more transformers and a second loss when at least one of the one or more transformers is eliminated. The determination unit 107 determines whether or not to eliminate at least one of the one or more transformers based on the first loss and second loss derived by the derivation unit 106. The output unit 108 outputs the determination result made by the determination unit 107 as to whether or not to eliminate at least one of the one or more transformers.

[0068] With this configuration, the information processing system 100 can derive the first loss of one or more transformers and the second loss when at least one of the one or more transformers is eliminated, and determine whether to eliminate at least one of the one or more transformers based on the derived first loss and second loss. For example, by replacing two transformers with one transformer, the loss equivalent to one transformer can be reduced. This allows the consumer to decide whether to eliminate at least one of the one or more transformers.

[0069] In the information processing system 100, the determining unit 107 determines to remove at least one of the one or more transformers when the first loss is equal to or greater than the second loss. With this configuration, the information processing system 100 can make the customer take measures to cut back on at least one of one or more transformers when the first loss is equal to or greater than the second loss.

[0070] In the information processing system 100, the derivation unit 106 derives a first loss of one or more transformers and a third loss when at least one transformer is added. The determination unit 107 determines whether to add at least one transformer based on the first loss and the third loss derived by the derivation unit 106. As the number of transformers used in a single transformer increases and the current approaches the rated value, the loss increases. In such a case, at least one transformer is added. The output unit 108 outputs the determination result of the determination unit 107 as to whether to add at least one transformer.

[0071] With this configuration, the information processing system 100 can derive the first loss of one or more transformers and the third loss when at least one transformer is added, and determine whether to add at least one transformer based on the derived first loss and third loss. This allows the consumer to decide whether to add at least one transformer.

[0072] In the information processing system 100, the determining unit 107 determines to add at least one transformer when the first loss is equal to or greater than the third loss. With this configuration, the information processing system 100 can make the consumer take measures to increase the number of at least one transformer when the first loss is equal to or greater than the third loss.

[0073] The information processing system 100 further includes a voltage information acquisition unit 155 that acquires information indicating the voltage of each of one or more transformers included in the power distribution facility. A determination unit 157 determines whether or not to change the taps in use of one or more transformers, based on the information indicating the one or more transformers acquired by the transformer information acquisition unit 154 and the information indicating the voltage of each of the one or more transformers acquired by the voltage information acquisition unit 155.

[0074] With this configuration, the information processing system 100 can determine whether to change the tap used for one or more transformers based on information indicating the voltage of each of the one or more transformers and information indicating the voltage of each of the one or more transformers. Because the transformer tap can be changed so that the supply voltage is appropriate, it is possible to prevent the voltage supplied to the load from being too high, which increases the load's power consumption, or the voltage supplied to the load from being too low, which increases the current and increases loss in the wiring.

[0075] The information processing system 100 further includes a power factor information acquisition unit 175 that acquires information indicating the power factor of each of one or more transformers included in the power distribution facility. The determination unit 177 determines the capacitance of a capacitor for improving the power factor based on the information indicating the one or more transformers acquired by the transformer information acquisition unit 174 and the information indicating the power factor of each of the one or more transformers acquired by the power factor information acquisition unit 175. This configuration can suppress an increase in transformer load loss that occurs when the load side of the transformer has a lagging power factor. Here, if there is additional load equipment to be added, the information processing system 100 may receive information about the load and the system connected to the load, and automatically determine whether the distribution equipment needs to be modified. For example, if a load that varies seasonally, such as an air conditioning system, is connected, the information processing system 100 may determine whether the distribution equipment needs to be modified based on the load factor and power factor measured throughout the year in the system and manufacturing drawings, such as a wiring diagram for the distribution equipment. Specifically, if the information processing system 100 determines that there is room for additional transformer capacity if the power factor is improved, it may suggest connecting a phase-leading capacitor to the low-voltage side.

[0076] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like are also included within the scope of the present invention. For example, a computer program for realizing the functions of each of the above-described devices may be recorded on a computer-readable recording medium, and the computer program recorded on this recording medium may be read and executed by a computer system. Note that the "computer system" referred to here may also include hardware such as an OS and peripheral devices.

[0077] Additionally, "computer-readable recording media" refers to writable non-volatile memory such as flexible disks, optical magnetic disks, ROMs, and flash memories, portable media such as DVDs (Digital Versatile Discs), and storage devices such as hard disks built into computer systems. Furthermore, "computer-readable recording media" also includes devices that retain a program for a certain period of time, such as volatile memory (e.g., DRAM (Dynamic Random Access Memory)) within computer systems that act as servers or clients when a computer program is transmitted via a network such as the Internet or a communication line such as a telephone line.

[0078] The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by transmission waves in the transmission medium. Here, the "transmission medium" that transmits the program refers to a medium that has the function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may also be for realizing part of the above-mentioned functions. Furthermore, it may be a so-called differential file (differential program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system. [Explanation of symbols]

[0079] 1...energy management system, 12-1, 12-2, 12-3...communication unit, 13...temperature measurement unit, 14...storage unit, 15, 18, 19...calculation unit, 16...display unit, 17...control unit, 20...management device, 50...IoT device, 100...information processing system, 102...communication unit, 103...reception unit, 104, 154, 174...transformer information acquisition unit, 105...current information acquisition unit, 155...voltage information acquisition unit, 175...power factor information acquisition unit, 106...derivation unit, 107, 157, 177...determination unit, 108...output unit, 110...storage unit

Claims

1. a reception unit that receives wiring diagram information of the power distribution facility; a transformer information acquisition unit that acquires information indicating one or more transformers included in the wiring diagram based on the wiring diagram information received by the reception unit; a current information acquisition unit that acquires information indicating a current flowing through each of the one or more transformers included in the power distribution facility; a derivation unit that derives losses of one or more of the transformers based on information indicating the one or more transformers acquired by the transformer information acquisition unit and information indicating a current flowing through each of the one or more transformers acquired by the current information acquisition unit; a determination unit that determines whether or not the distribution facility needs to be modified based on the loss derived by the derivation unit; and an output unit that outputs a determination result of whether or not a change to the power distribution facility is necessary, made by the determination unit; An information processing system comprising:

2. The information processing system according to claim 1 , wherein the information indicating the transformer is an iron loss and a copper loss of the transformer.

3. the derivation unit derives a first loss of one or more of the transformers and a second loss when at least one of the one or more transformers is removed, the determination unit determines whether to remove at least one of the one or more transformers based on the first loss and the second loss derived by the derivation unit; The information processing system according to claim 1 , wherein the output unit outputs a result of the determination made by the determination unit as to whether or not at least one of the one or more transformers should be removed.

4. The information processing system according to claim 3 , wherein the determining unit determines to remove at least one of the one or more transformers when the first loss is equal to or greater than the second loss.

5. the derivation unit derives a first loss of one or more of the transformers and a third loss when at least one transformer is added; the determination unit determines whether to increase at least one transformer based on the first loss and the third loss derived by the derivation unit; 3. The information processing system according to claim 1, wherein the output unit outputs a result of the determination made by the determination unit as to whether or not to increase at least one transformer.

6. The information processing system according to claim 5 , wherein the determining unit determines to add at least one transformer when the first loss is equal to or greater than the third loss.

7. a voltage information acquisition unit that acquires information indicating the voltage of each of the one or more transformers included in the power distribution facility; Furthermore, 2. The information processing system of claim 1, wherein the determination unit determines whether to change the taps in use of one or more of the transformers based on information indicating one or more of the transformers acquired by the transformer information acquisition unit and information indicating the voltages of each of the one or more transformers acquired by the voltage information acquisition unit.

8. a power factor information acquisition unit that acquires information indicating the power factor of each of the one or more transformers included in the power distribution facility; Furthermore, 2. The information processing system of claim 1, wherein the determination unit determines the capacitance of a capacitor for improving the power factor based on information indicating one or more of the transformers acquired by the transformer information acquisition unit and information indicating the power factor of each of the one or more transformers acquired by the power factor information acquisition unit.

9. A computer-implemented information processing method, comprising: receiving wiring diagram information for the power distribution facility; acquiring information indicating one or more transformers included in the wiring diagram based on the wiring diagram information received in the receiving step; acquiring information indicating a current flowing through each of the one or more transformers included in the power distribution facility; deriving losses in one or more of the transformers based on information indicative of the one or more transformers and information indicative of a current flowing through each of the one or more transformers; determining whether or not a change to the power distribution facility is necessary based on the loss derived in the deriving step; a step of outputting a determination result of whether or not a change to the power distribution facility is necessary in the determining step; An information processing method comprising:

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