JP2020137228A - Control device, control method, uninterruptible power supply device, and computer program - Google Patents

Abstract

To provide a control device, a control method, an uninterruptible power supply device, and a computer program that can prevent excessive deterioration of a specific cooling fan from among cooling fans provided in a plurality of uninterruptible power supply devices.SOLUTION: A control device according to an embodiment includes a state control unit. The state control unit performs control such that power is supplied from an uninterruptible power supply device including a fan having a smaller degree of deterioration out of a first deterioration degree indicating the degree of deterioration of a fan included in the first uninterruptible power supply device that supplies power to a load and a second deterioration degree indicating the degree of deterioration of a fan included in the second uninterruptible power supply device that supplies power to the load when the first uninterruptible power supply stops.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to control devices, control methods, uninterruptible power supplies and computer programs.

Conventionally, the power supply of load equipment such as an internet data center, an online system of a bank or a securities company needs to be continuously maintained at a constant voltage and a constant frequency even if a power failure occurs. Therefore, an uninterruptible power supply (UPS) that supplies power to the load equipment from the power charged in the storage battery when the AC power supplied from an external commercial power supply is lost is generally used. ing. The uninterruptible power supply includes a cooling fan to dissipate heat generated from built-in devices such as an inverter converter. In the uninterruptible power supply, the built-in equipment of the uninterruptible power supply may be damaged due to the failure of the cooling fan. For this reason, the uninterruptible power supply generally has a mechanism for stopping the uninterruptible power supply itself due to a failure of the cooling fan. Cooling fans have a shorter lifespan than uninterruptible power supplies and require regular replacement. However, the life of the cooling fan may vary depending on the usage environment and individual differences. For this reason, the uninterruptible power supply may stop due to the cooling fan failing before the periodic replacement.

JP-A-2018-98960 Japanese Unexamined Patent Publication No. 2016-78299 Japanese Unexamined Patent Publication No. 2012-226960

The problem to be solved by the present invention is a control device, a control method, an uninterruptible power supply, and a computer capable of preventing excessive deterioration of a specific cooling fan among cooling fans provided in a plurality of uninterruptible power supplies. To provide a program.

The control device of the embodiment has a state control unit. The state control unit has a first degree of deterioration indicating the degree of deterioration of the fan included in the first uninterruptible power supply that supplies electric power to the load, and a second non-existence that supplies electric power to the load when the first uninterruptible power supply is stopped. Of the second degree of deterioration indicating the degree of deterioration of the fan included in the power failure power supply, the uninterruptible power supply including the fan representing a smaller degree of deterioration is controlled to supply power to the load.

The figure which shows an example of the schematic diagram which shows the uninterruptible power supply system 1 of 1st Embodiment. The functional block diagram which shows the structure of the control device 100 of 1st Embodiment. The flowchart which shows the process flow of the control apparatus 100 of 1st Embodiment. The sequence diagram which shows the processing flow of the uninterruptible power supply system 1 of 1st Embodiment. The figure which shows an example of the schematic diagram which shows the uninterruptible power supply system 2 of the 2nd Embodiment. The functional block diagram which shows the structure of the control device 100a of 2nd Embodiment.

Hereinafter, the control device, the control method, the uninterruptible power supply, and the computer program of the embodiment will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of a schematic diagram showing an uninterruptible power supply system 1 according to the first embodiment. The uninterruptible power supply system 1 includes a plurality of uninterruptible power supply devices 10 (uninterruptible power supply devices 10-1 to 10-2) and a parallel board 200. The uninterruptible power supply system 1 supplies power to the load 300. The uninterruptible power supply system 1 comprises a plurality of uninterruptible power supply devices 10 in standby parallel mode. The standby parallel configuration includes an uninterruptible power supply 10 as a main system and an uninterruptible power supply 10 as a slave system. In the present embodiment, the uninterruptible power supply 10-1 will be described as the main system, and the uninterruptible power supply 10-2 will be described as the secondary system. The uninterruptible power supply 10-1 which is the main system supplies electric power to the load 300. The subordinate uninterruptible power supply device 10-2 does not supply power to the load 300 while the power is being supplied by the uninterruptible power supply device 10-1. The uninterruptible power supply 10-2 supplies power to the load 300 when the uninterruptible power supply 10-1 is stopped. In the present embodiment, the number of uninterruptible power supply devices 10 is two, but it may be three or more. The uninterruptible power supply device 10-2 has the same configuration as the configuration example of the uninterruptible power supply device 10-1 shown in FIG. Hereinafter, when it is not distinguished which of the non-disruptive power supply devices, it will be described simply as the non-disruptive power supply device 10. The uninterruptible power supply 10-1 is an aspect of the first uninterruptible power supply. The uninterruptible power supply 10-2 is one aspect of the second uninterruptible power supply.

When the power is supplied from the AC commercial power supply 5 (hereinafter referred to as "normal time"), the uninterruptible power supply 10 supplies the AC power supplied from the commercial power supply 5 to the load 300. Such an operating state of the uninterruptible power supply system 1 in normal times is called a "normal state". On the other hand, when the supply of AC power from the AC commercial power supply 5 is stopped (hereinafter referred to as "in the event of a failure"), the uninterruptible power supply 10 supplies AC power to the load 300 from the storage battery 40 connected to its own device. To do. The operating state of the uninterruptible power supply system 1 at the time of such a failure is called a "discharged state". The uninterruptible power supply 10 controls switching between the two operating states described above.

The uninterruptible power supply 10 is a converter 20 (converter 20-1 to converter 20-2), an inverter 30 (inverter 30-1 to inverter 30-2), a storage battery 40 (storage battery 40-1 to storage battery 40-2), and switching. Device 50 (switch 50-1 to switch 50-2), cooling fan 60 (cooling fan 60-1 to cooling fan 60-2), and control device 100 (control device 100-1 to control device 100-2). Be prepared. The control device 100 is realized by executing a program by a processor such as a CPU (Central Processing Unit).

The converter 20-1 sequentially converts the AC power supplied from the commercial power source 5 into DC power.
The inverter 30-1 is connected to the converter 20-1 and the storage battery 40-1. The inverter 30-1 converts the DC power output from the converter 20-1 and the DC power supplied from the storage battery 40-1 into AC power. The AC power output from the inverter 30-1 is supplied to the load 300 via the switch 50-1 and the parallel board 200.

In normal times, the storage battery 40 (storage battery 40-1 to storage battery 40-2) stores a part of the electric power supplied from the AC commercial power source 5 via the uninterruptible power supply 10. On the other hand, in the event of a failure, the stored electric power is discharged to the inverter 30 (inverter 30-1 to inverter 30-2).

The switch 50-1 switches the supply path of the AC power supplied to the load 300 according to the control of the control device 100-1. There are two types of supply channels. The first supply path is a supply path via the converter 20-1 and the inverter 30-1. The second supply path is a supply path that does not pass through the converter 20-1 and the inverter 30-1. The first supply route is a route normally used. The second supply route is a route used when the first supply route cannot be used, for example, during maintenance of the uninterruptible power supply device 10.

The cooling fan 60 (cooling fan 60-1 to cooling fan 60-2) is driven to rotate to assist the heat dissipation of the uninterruptible power supply device 10. The cooling fan 60 is provided in the uninterruptible power supply 10.

The parallel board 200 includes a plurality of power switches (not shown). The parallel board 200 selects power supply from the inverter 30 side of the uninterruptible power supply 10 to the load 300 side according to the closing of the power switch from the uninterruptible power supply 10.

The load 300 is an electric device operated by AC power supplied from the uninterruptible power supply 10. For example, the load 300 is a load facility such as an Internet data center, an online system of a bank or a securities company.

FIG. 2 is a functional block diagram showing the configuration of the control device 100 of the first embodiment. Hereinafter, the configuration of each device of the control device 100 will be described with reference to FIG. The control device 100 functions as a device including a communication unit 101, a microphone 102, and a control unit 103 by executing a control program. The control device 100 may be realized by using hardware such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array). The configuration of the control device 100-1 and the configuration of the control device 100-2 have the same configuration as the configuration example of the control device 100 shown in FIG.

The communication unit 101 is a network interface. The communication unit 101 communicates with another device via a network or a communication line. The communication unit 101 may communicate by a communication method such as a wireless LAN (Local Area Network), a wired LAN, Bluetooth (registered trademark) or LTE (Long Term Evolution) (registered trademark).

The microphone 102 acquires the driving sound of the cooling fan 60. The microphone 102 acquires the driving sound of the cooling fan 60 without contacting the cooling fan 60. The microphone 102 generates an audio signal based on the acquired sound. The microphone 102 outputs the generated audio signal to the control unit 103.

The control unit 103 controls the operation of each unit of the control device 100. The control unit 103 is executed by a device including a processor such as a CPU and a RAM (Random Access Memory), for example. By executing the control program, the control unit 103 functions as the own device deterioration degree estimation unit 104, the other device deterioration degree acquisition unit 105, the deterioration degree determination unit 106, and the state control unit 107.

The own device deterioration degree estimation unit 104 estimates the deterioration degree of the cooling fan 60 provided in the uninterruptible power supply device 10. The degree of deterioration is an index indicating deterioration in quality or performance of the cooling fan 60. The degree of deterioration is estimated based on the driving sound of the cooling fan 60. Deterioration of the cooling fan 60 accelerates as the ambient temperature of the cooling fan 60 increases based on the Arrhenius law. Therefore, the degree of deterioration is accelerated by the cooling fan 60 provided in the main uninterruptible power supply 10-1.

The own device deterioration degree estimation unit 104 acquires the driving sound of the cooling fan 60 by removing noise that becomes noise from the voice signal. The driving sound of the cooling fan 60 may be, for example, the sound of the bearings constituting the cooling fan 60. The noise-like sound is, for example, the operating sound of the converter 20, the operating sound of the inverter 30, the sound of the wind generated by the rotation of the cooling fan 60, or the like. The sound that becomes noise may be any sound other than the driving sound of the cooling fan 60. The own device deterioration degree estimation unit 104 holds in advance the characteristic of voice that becomes noise. The own device deterioration degree estimation unit 104 estimates the deterioration degree based on the acquired driving sound of the cooling fan 60. The own device deterioration degree estimation unit 104 uses a known method for the own device deterioration degree estimation unit 104 for the sound in the frequency band outside the audible range among the acquired drive sounds of the cooling fan 60. May be estimated. The own device deterioration degree estimation unit 104 outputs the estimated deterioration degree as the own device deterioration degree to the deterioration degree determination unit 106.

The other device deterioration degree acquisition unit 105 acquires the deterioration degree from the other control device 100 via the communication unit 101. The other control device 100 is a control device included in the uninterruptible power supply device 10 constituting the uninterruptible power supply system 1. The other device deterioration degree acquisition unit 105 outputs the acquired deterioration degree as the deterioration degree of the other device to the deterioration degree determination unit 106.

The deterioration degree determination unit 106 determines which cooling fan 60 provided in the uninterruptible power supply 10 is the most deteriorated based on the deterioration degree of the own device and the deterioration degree of the other device. Specifically, the deterioration degree determination unit 106 compares the deterioration degree of the own device with the deterioration degree of the other device. When the degree of deterioration of the other device is higher than the degree of deterioration of the own device, the deterioration degree determination unit 106 is an uninterruptible power supply device that is another device than the cooling fan 60 provided in the uninterruptible power supply device 10 that is the own device. It is determined that the cooling fan 60 provided in 10 is deteriorated. When the deterioration degree of the own device is higher than the deterioration degree of the other device, the deterioration degree determination unit 106 is the uninterruptible power supply device which is the own device rather than the cooling fan 60 provided in the uninterruptible power supply device 10 which is the other device. It is determined that the cooling fan 60 provided in 10 is deteriorated. The deterioration degree determination unit 106 outputs the determination result to the state control unit 107.

The state control unit 107 controls the uninterruptible power supply device 10 in which the cooling fan 60 having a small degree of deterioration is installed to supply electric power to the load 300 based on the determination result by the deterioration degree determination unit 106. Specifically, when the state control unit 107 acquires a determination result indicating that the deterioration degree of the other device is higher than the deterioration degree of the own device, the state control unit 107 transmits the main control information to the other control device 100. To do. The state control unit 107 controls the uninterruptible power supply device 10, which is its own device, to operate as the main system. The main system control information is information for notifying another control device 100 that the own device becomes the main system. The main system control information may include the timing when the own device is the main system. The state control unit 107 operates the uninterruptible power supply device 10 as the main system at a predetermined timing. The uninterruptible power supply 10 controlled as the main system supplies electric power to the load 300. When the state control unit 107 acquires a determination result indicating that the deterioration degree of the own device is higher than the deterioration degree of the other device, the state control unit 107 controls the own device to operate as a slave system. The state control unit 107 acquires main system control information from another control device 100. The state control unit 107 operates the uninterruptible power supply device 10 as a slave system at a predetermined timing. The uninterruptible power supply 10 controlled as a slave system does not supply power to the load 300. The predetermined timing may be any timing as long as the timing at which the control device 100 and the other control device 100 switch the operation as the main system or the slave system is the same. If it is not necessary to switch between the main system and the sub system of the uninterruptible power supply 10 based on the determination result, the state control unit 107 does not control the switching.

FIG. 3 is a flowchart showing a processing flow of the control device 100 of the first embodiment. The control device 100 performs processing at a predetermined timing. The predetermined timing may be every hour or every other day. The predetermined timing may be any timing as long as it is a predetermined timing. In FIG. 3, the own device will be described as an uninterruptible power supply device 10-1, and the other device will be described as an uninterruptible power supply device 10-2. The microphone 102 of the control device 100 acquires the driving sound of the cooling fan 60 (step S101). The own device deterioration degree estimation unit 104 estimates the own device deterioration degree indicating the deterioration degree of the cooling fan 60-1 provided in the uninterruptible power supply device 10-1 (step S102). The other device deterioration degree acquisition unit 105 has a deterioration degree of the cooling fan 60-2 provided in the uninterruptible power supply device 10-2 provided with the control device 100-2 from the other control device 100-2 via the communication unit 101. Acquires the degree of deterioration of another device indicating (step S103).

The deterioration degree determination unit 106 determines which cooling fan 60 provided in the uninterruptible power supply 10 is the most deteriorated by comparing the deterioration degree of the own device with the deterioration degree of the other device (step S104). .. When the degree of deterioration of the other device is higher than the degree of deterioration of the own device (step S104: YES), the state control unit 107 controls the uninterruptible power supply device 10-1 as the main system (step S105). When the degree of deterioration of the other device is not higher than the degree of deterioration of the own device (step S104: NO), the state control unit 107 controls the uninterruptible power supply device 10-1 as a slave system (step S106).

FIG. 4 is a sequence diagram showing a processing flow of the uninterruptible power supply system 1 of the first embodiment. Here, a case where the uninterruptible power supply system 1 controls the uninterruptible power supply 10-1 as the main system and the uninterruptible power supply 10-2 as the slave system will be described. The microphone 102-1 of the control device 100-1 acquires a driving sound from the cooling fan 60-1 (step S201). The microphone 102-2 of the control device 100-2 acquires a driving sound from the cooling fan 60-1 (step S202). The own device deterioration degree estimation unit 104-1 of the control device 100-1 estimates the own device deterioration degree indicating the deterioration degree of the cooling fan 60-1 provided in the uninterruptible power supply device 10-1 (step S203). The own device deterioration degree estimation unit 104-2 of the control device 100-2 estimates the own device deterioration degree indicating the deterioration degree of the cooling fan 60-2 provided in the uninterruptible power supply device 10-2 (step S204). The other device deterioration degree acquisition unit 105-1 of the control device 100-1 acquires the deterioration degree from the control device 100-2 via the communication unit 101-1 (step S205). The other device deterioration degree acquisition unit 105-2 of the control device 100-2 acquires the deterioration degree from the control device 100-1 via the communication unit 101-2 (step S206).

The deterioration degree determination unit 106-1 of the control device 100-1 describes the degree of deterioration of the cooling fan 60-1 provided in the uninterruptible power supply 10-1 and the cooling fan 60- provided in the uninterruptible power supply 10-2. Compare with the degree of deterioration of 2 (step S207). As a result of comparison, the deterioration degree determination unit 106-1 determines that the deterioration degree of the uninterruptible power supply device 10-2 is higher than the deterioration degree of the uninterruptible power supply device 10-1. The deterioration degree determination unit 106-2 of the control device 100-2 compares the deterioration degree of the cooling fan 60-2 provided in the uninterruptible power supply device 10-2 with the deterioration degree of the uninterruptible power supply device 10-1 ( Step S208). As a result of comparison, the deterioration degree determination unit 106-2 shows that the degree of deterioration of the uninterruptible power supply 10-2 is higher than that of the cooling fan 60-1 provided in the uninterruptible power supply 10-1. Judged as high.

The state control unit 107-1 of the control device 100-1 transmits the main system control information to the control device 100-2 (step S209). The state control unit 107-1 of the control device 100-1 controls the uninterruptible power supply device 10-1 to operate as the main system (step S210). The state control unit 107-2 of the control device 100-2 controls the uninterruptible power supply device 10-2 to operate as a slave system (step S210). It should be noted that step S210 and step S211 are executed at the same timing.

In the uninterruptible power supply system 1 configured in this way, the own device deterioration degree estimation unit 104 estimates the deterioration degree by the sound of the cooling fan 60 provided in the uninterruptible power supply device 10. The other device deterioration degree acquisition unit 105 acquires the deterioration degree of the cooling fan 60 provided in the other uninterruptible power supply device 10. The deterioration degree determination unit 106 compares the estimated deterioration degree with the acquired deterioration degree, and determines which cooling fan 60 is deteriorated. The state control unit 107 controls to switch between the main system and the sub system of the uninterruptible power supply 10 according to the determination result. Specifically, the state control unit 107 controls the uninterruptible power supply device 10 provided with the cooling fan 60 having a higher degree of deterioration to be a slave system, and the uninterruptible power supply device 10 provided with the cooling fan 60 having a lower degree of deterioration is used. Control to make it the main system. By operating the uninterruptible power supply system 1 while switching between the main system and the sub system, it is possible to prevent a state in which the specific cooling fan 60 is excessively deteriorated. Failure of the cooling fan 60 can be suppressed by preventing excessive deterioration of the cooling fan 60. Therefore, the possibility of failure stoppage of the uninterruptible power supply 10 due to the failure of the cooling fan 60 can be reduced.

(Second Embodiment)
Next, the uninterruptible power supply system 2 in the second embodiment will be described. FIG. 5 is a diagram showing an example of a schematic diagram showing the uninterruptible power supply system 2 of the second embodiment. The uninterruptible power supply system 2 according to the second embodiment includes an uninterruptible power supply 10a-1 instead of the uninterruptible power supply 10-1, and an uninterruptible power supply 10a-2 instead of the uninterruptible power supply 10-2. The configuration is the same as that of the first embodiment, except that the air conditioner 400 is further provided. Hereinafter, the points different from the first embodiment will be described. The uninterruptible power supply device 10a-2 has the same configuration as the configuration example of the uninterruptible power supply device 10a-1 shown in FIG. Hereinafter, when it is not distinguished which uninterruptible power supply device is used, it will be described simply as the uninterruptible power supply device 10a.

The uninterruptible power supply 10a is a converter 20 (converter 20-1 to converter 20-2), an inverter 30 (inverter 30-1 to inverter 30-2), a storage battery 40 (storage battery 40-1 to storage battery 40-2), and switching. Device 50 (switch 50-1 to switch 50-2), cooling fan 60 (cooling fan 60-1 to cooling fan 60-2), and control device 100a (control device 100a-1 to control device 100a-2). Be prepared. The control device 100a is realized by executing a program by a processor such as a CPU.

The air conditioner 400 adjusts the temperature in the room where the uninterruptible power supply 10a is installed. The air conditioner 400 adjusts the ambient temperature of the uninterruptible power supply 10a based on the control by the control device 100a. The air conditioner 400 adjusts, for example, the ambient temperature of the uninterruptible power supply 10a on the high deterioration side to be lower than the ambient temperature of the uninterruptible power supply 10a on the low deterioration side. A plurality of air conditioners 400 may be provided.

FIG. 6 is a functional block diagram showing the configuration of the control device 100a of the second embodiment. The control device 100a functions as a device including a communication unit 101, a microphone 102, and a control unit 103a by executing a control program. The control device 100a may be realized by using hardware such as ASIC, PLD, and FPGA. The configuration of the control device 100a-1 and the configuration of the control device 100a-2 have the same configuration as the configuration example of the control device 100a shown in FIG.

The control unit 103a controls the operation of each unit of the control device 100a. The control unit 103a is executed by a device including a processor such as a CPU and a RAM. By executing the control program, the control unit 103a functions as the own device deterioration degree estimation unit 104, the other device deterioration degree acquisition unit 105, the deterioration degree determination unit 106, the state control unit 107, and the air conditioning control unit 108.

The air conditioning control unit 108 controls the air conditioning device 400 based on the determination result of the deterioration degree determination unit 106. Specifically, the air conditioner control unit 108 is a cooling fan 60 provided in the uninterruptible power supply 10a, which is another device, rather than the degree of deterioration of the cooling fan 60 provided in the uninterruptible power supply 10a provided with the control device 100a. When the degree of deterioration is higher, the air conditioner 400 is controlled to lower the ambient temperature of the uninterruptible power supply 10a, which is another device. When the air conditioner control unit 108 has a higher degree of deterioration of the cooling fan 60 provided in the uninterruptible power supply 10a, which is its own device, than the degree of deterioration of the cooling fan 60 provided in the uninterruptible power supply 10a, which is another device. The air conditioner 400 is controlled to lower the ambient temperature of the uninterruptible power supply 10a, which is its own device.

In the uninterruptible power supply system 2 configured in this way, the air conditioning control unit 108 controls the air conditioning device 400 based on the determination result of the deterioration degree determination unit 106. For example, the air conditioning control unit 108 controls the air conditioning device 400 to lower the ambient temperature of the uninterruptible power supply 10a provided with the cooling fan 60 having a higher degree of deterioration. Therefore, by lowering the ambient temperature of the cooling fan 60 having a high degree of deterioration, it is possible to prevent the specific cooling fan 60 from being excessively deteriorated. Failure of the cooling fan 60 can be suppressed by preventing excessive deterioration of the cooling fan 60. Therefore, by suppressing the failure of the cooling fan 60, the possibility of failure stoppage of the uninterruptible power supply device 10a due to the failure of the cooling fan 60 can be reduced.

In each of the above embodiments, the own device deterioration degree estimation unit, the other device deterioration degree acquisition unit, the deterioration degree determination unit, the state control unit, and the air conditioning control unit are assumed to be software function units, but hardware function units such as LSIs are used. It may be.

The control device may be implemented by using a plurality of information processing devices that are communicably connected via a network. In this case, each functional unit included in the control device may be distributed and mounted in a plurality of information processing devices. For example, the deterioration degree acquisition unit and the deterioration degree determination unit of other devices may be mounted on different information processing devices.

According to at least one embodiment described above, failure of the cooling fan 60 is suppressed by having the own device deterioration degree estimation unit 104, the other device deterioration degree acquisition unit 105, the deterioration degree determination unit 106, and the state control unit 107. However, the possibility of failure stoppage of the uninterruptible power supply device 10 can be reduced.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention as well as the invention described in the claims and the equivalent scope thereof.

1 ... Uninterruptible power supply system, 2 ... Uninterruptible power supply system, 5 ... Commercial power supply, 10 ... Uninterruptible power supply, 20 ... Converter, 30 ... Inverter, 40 ... Storage battery, 50 ... Switch, 60 ... Cooling fan, 100 ... Control device, 101 ... Communication unit, 102 ... Mike, 103 ... Control unit, 104 ... Own device deterioration degree estimation unit, 105 ... Other device deterioration degree acquisition unit, 106 ... Deterioration degree determination unit, 107 ... State control unit, 108 ... Air conditioning control unit, 200 ... parallel board, 300 ... load, 400 ... air conditioning device

Claims (6)

The first uninterruptible power supply, which represents the degree of deterioration of the fan of the first uninterruptible power supply that supplies power to the load, and the second uninterruptible power supply that supplies power to the load when the first uninterruptible power supply is stopped An uninterruptible power supply that controls the uninterruptible power supply to supply power to the load among the second deterioration degree indicating the deterioration degree of the fan,
A control device comprising. The control device according to claim 1, further comprising a deterioration degree estimation unit that estimates the deterioration degree of the fan based on the driving sound of the fan. An air conditioning control unit that controls an air conditioner that controls the environment in which the first uninterruptible power supply and the second uninterruptible power supply are installed based on the first degree of deterioration or the second degree of deterioration is further provided. The control device according to claim 1 or 2. The control device supplies power to the load. The first uninterruptible power supply, which indicates the degree of deterioration of the fan included in the first uninterruptible power supply, and the second uninterruptible power supply, which supplies power to the load when the first uninterruptible power supply is stopped. A control method including a state control step for controlling an uninterruptible power supply including a fan having a smaller degree of deterioration among the second degree of deterioration of the fan provided in the power supply to supply power to the load. .. An uninterruptible power supply device including the control device according to any one of claims 1 to 3. A computer program for operating a computer as a control device according to any one of claims 1 to 3.

Images