Uninterruptible power supply system, uninterruptible power supply deterioration determination device, uninterruptible power supply deterioration determination program, and uninterruptible power supply deterioration determination method

Abstract

An uninterruptible power supply system, an uninterruptible power supply degradation determination device, an uninterruptible power supply degradation determination program, and an uninterruptible power supply degradation determination method are provided that are capable of determining the degree of degradation of a cooling unit in stages. [Solution] The uninterruptible power supply system includes an uninterruptible power supply (2) that transmits cooling unit deterioration information indicating deterioration of the cooling unit (28), and a judgment unit (5) that receives the cooling unit deterioration information from the uninterruptible power supply (2) and judges the deterioration state of the cooling unit of the uninterruptible power supply (2) in stages based on the received cooling unit deterioration information.

Description

[Technical field]

[0001] The present embodiment relates to an uninterruptible power supply system that supplies power during a power outage in a power grid, an uninterruptible power supply degradation determination device, an uninterruptible power supply degradation determination program, and an uninterruptible power supply degradation determination method. [Background technology]

[0002] Load equipment such as internet data centers, banks, and securities companies' online systems require a continuous supply of constant-voltage, constant-frequency power as a power source. In recent years, the importance of information infrastructure has increased, and many load equipment that operates without interruption has become widespread. For this reason, there is an increasing demand for uninterruptible power supply systems that can supply power to load equipment without interruption.

[0003] When the power to the commercial power supply is interrupted, the uninterruptible power supply system converts the DC power discharged from the storage battery into AC power and supplies the AC power to the load equipment without momentary interruption. Such an uninterruptible power supply system has an AC / DC conversion unit that converts the supplied AC power into AC / DC, a storage battery that is charged with the DC power supplied from the AC / DC conversion unit, and a DC / AC conversion unit that converts the DC power discharged from the storage battery into DC / AC and outputs the AC power. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-222982 A Summary of the Invention [Problem to be solved by the invention]

[0005] The uninterruptible power supply system as described above has an AC / DC converter that converts supplied AC power into AC / DC power, and a DC / AC converter that converts DC power into DC / AC power and outputs AC power. The AC / DC converter and the DC / AC converter are configured with switching circuits made of semiconductors and generate heat. The uninterruptible power supply system has a cooling unit that cools the AC / DC converter and the DC / AC converter.

[0006] However, the cooling unit is composed of members having moving parts such as a cooling fan, and therefore deteriorates over time. The degree of deterioration of the cooling unit varies depending on the installation environment of the uninterruptible power supply system, the usage conditions, and each individual cooling unit. The cooling unit is periodically maintained, but there is a possibility that the cooling unit may malfunction before maintenance.

[0007] If the cooling unit malfunctions, the AC-DC converter and DC-AC converter of the uninterruptible power supply system will become hot, which may damage each component of the uninterruptible power supply system. Damage to each component of the uninterruptible power supply system is inconvenient because it will no longer be possible to supply stable power to the load equipment. Therefore, it is desirable to predict the deterioration of the cooling unit, which has moving parts, in advance and prevent damage to the uninterruptible power supply system in advance.

[0008] Deterioration of the cooling unit of an uninterruptible power supply system can be estimated by extracting the sound generated by the cooling unit. However, even if it is determined that the cooling unit has deteriorated, it may take time to arrange for parts, etc., and the uninterruptible power supply system may not be repaired promptly. In such cases, depending on the time until repair and the degree of deterioration of the cooling unit, it may be desirable to continue operating the uninterruptible power supply system.

[0009] The present embodiment aims to provide an uninterruptible power supply system, a deterioration judgment device for an uninterruptible power supply, a deterioration judgment program for an uninterruptible power supply, and an uninterruptible power supply deterioration judgment method that can determine the degree of deterioration of the cooling section in stages. [Means for solving the problem]

[0010] The uninterruptible power supply system of this embodiment is characterized by having the following configuration. (1) An uninterruptible power supply that extracts the sound generated by a cooling unit from the operating sound of a power supply unit and transmits cooling unit deterioration information indicating deterioration of the cooling unit. (2) A judgment unit that receives information regarding the sound of the cooling unit of the uninterruptible power supply, and outputs a graph showing a predicted deterioration state of the cooling unit of the uninterruptible power supply based on the received information regarding the sound of the cooling unit. (3) The judgment unit generates a graph showing a prediction of a deterioration state of the cooling unit from a function obtained by machine learning based on data showing a deterioration state corresponding to an operating time. For each temperature at which the uninterruptible power supply is used Output.

[0011] The present embodiment also includes a degradation determining device for an uninterruptible power supply, a degradation determining program for an uninterruptible power supply, and a degradation determining method for an uninterruptible power supply having the above-mentioned features. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing an uninterruptible power supply system according to a first embodiment. [Diagram 2] FIG. 1 is a diagram showing a configuration of an uninterruptible power supply according to a first embodiment; [Diagram 3] FIG. 1 is a diagram showing a configuration of a determination unit according to a first embodiment; [Figure 4] FIG. 13 is a diagram showing a program flow of a deterioration curve creation process of the determination unit according to the first embodiment. [Diagram 5] FIG. 1 is a diagram showing a program flow of deterioration determination processing of a determination unit according to the first embodiment; [Figure 6] FIG. 13 is a diagram showing a program flow of mild deterioration processing performed by the determination unit according to the first embodiment; [Figure 7] FIG. 13 is a diagram showing a program flow for severe deterioration processing of the determination unit according to the first embodiment; [Figure 8] FIG. 1 is a diagram showing a program flow of a control unit of an uninterruptible power supply according to a first embodiment; [Figure 9] FIG. 1 is a diagram showing a deterioration curve F according to the first embodiment. [Figure 10]FIG. 1 shows an uninterruptible power supply system according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] First embodiment [1-1. Configuration] An uninterruptible power supply system 1 as an example of the present embodiment will be described with reference to FIGS.

[0014] Overall configuration of uninterruptible power supply system 1 This uninterruptible power supply system 1 has a plurality of uninterruptible power supply devices 2 and a determination unit 5. In this embodiment, a case will be described in which this uninterruptible power supply system 1 has an arbitrary number n of uninterruptible power supply devices 2a, 2b to 2n. The uninterruptible power supply devices 2 are arranged on a power supply line 91. The power supply line 91 constitutes part of a power system 9 and supplies power to a consumer. The power system 9 is connected to a commercial power source 92. The AC power output from the uninterruptible power supply devices 2 is supplied to a load 8.

[0015] In this embodiment, when there are multiple devices or components with the same configuration, they are described with the same number, and when describing each device or component with the same configuration, they are distinguished by adding an alphabetical suffix to the common number. In this embodiment, the n uninterruptible power supplies 2a, 2b to 2n have the same configuration.

[0016] In this uninterruptible power supply system 1, the following signals and data are created, stored, or transmitted and received. Signal data A: Signal data related to the operating sound of the power supply unit 20 Signal data B: Signal data related to deterioration of the cooling unit 28 (Cooling unit deterioration information B1: information indicating deterioration of the cooling unit 28) (Usage environment information B2: Information indicating the environment in which the uninterruptible power supply 2 was used) (Usage history information B3: Information indicating the usage history of the uninterruptible power supply 2) Action Command C (Operation command C1: Operation command for specifying the operation of the AC-DC converter 21) (Operation command C2: Operation command for specifying the operation of the DC / AC conversion unit 23) (Operation command C3: Operation command that specifies the operation of the cooling unit 28) Stop command D (Stop command D1: a stop command that instructs the AC-DC conversion unit 21 to stop operating) (Stop command D2: a stop command to instruct the DC / AC conversion unit 23 to stop operating) (Stop command D3: a stop command to instruct the cooling unit 28 to stop operating) Deterioration curve F: Deterioration curve of cooling section 28 alarm signal J Power Supply Command H

[0017] In the present uninterruptible power supply system 1, a case will be described in which cooling unit deterioration information B1, which is one of the signal data B (signal data related to deterioration of the cooling unit 28), is sound generated by the cooling unit 28. The cooling unit deterioration information B1 may be information related to at least one of the sound generated by the cooling unit 28, vibration, current consumption, and AE (acoustic emission: sound waves or elastic waves emitted before deformation or damage of a material occurs) of the power supply unit 20.

[0018] Configuration of Uninterruptible Power Supply 2 The uninterruptible power supply 2 is a power supply device that converts AC power supplied from a power supply line 91 into DC power to charge a storage battery, and converts the DC power discharged from the storage battery into AC power and outputs it to a load 8. The uninterruptible power supply 2 has a power supply unit 20, a control unit 3, a detection unit 4, and a measurement unit 6. The uninterruptible power supply 2 is installed in a power distribution room of a power consumer, etc.

[0019] (2-1) Configuration of power supply unit 20 The power supply unit 20 has an AC / DC conversion unit 21, a storage battery 22, a DC / AC conversion unit 23, a bypass circuit 24, an input terminal 25, an auxiliary input terminal 26, an output terminal 27, and a cooling unit .

[0020] An input terminal 25 of the power supply unit 20 is connected to a power supply line 91 and is supplied with AC power. An output terminal 27 of the power supply unit 20 is connected to a load 8 and AC power is supplied to the load 8 from the power supply unit 20. An auxiliary input terminal 26 of the power supply unit 20 is a terminal to which a backup uninterruptible power supply (not shown in the figure) is connected and is supplied with backup AC power. In this embodiment, the auxiliary input terminal 26 of the power supply unit 20 is not connected.

[0021] (AC-DC conversion unit 21) The AC-DC conversion unit 21 is composed of a converter that converts AC power into DC power. The converter that constitutes the AC-DC conversion unit 21 has a switching element such as a transistor, and converts the AC power into DC power by switching the switching element.

[0022] The AC-DC converter 21 is installed near the storage battery 22. The AC side of the AC-DC converter 21 is connected to the power supply line 91 via the input terminal 25, and the DC side is connected to the storage battery 22 and the DC-AC converter 23.

[0023] The AC / DC converter 21 converts AC power supplied from the power supply line 91 via the input terminal 25 into DC power, and supplies the DC power to the storage battery 22 and the DC / AC converter 23 .

[0024] (Battery 22) The storage battery 22 is a rechargeable power storage device that stores electric charge related to the supplied DC power and discharges the stored electric charge as DC power. The storage battery 22 is configured by combining a plurality of rechargeable batteries such as lithium secondary batteries. The storage battery 22 is installed near the AC-DC conversion unit 21 and the DC-AC conversion unit 23. The storage battery 22 is connected to the AC-DC conversion unit 21 and the DC-AC conversion unit 23.

[0025] The storage battery 22 is charged with DC power that has been converted from AC to DC by the AC / DC converter 21. In addition, the DC power discharged from the storage battery 22 is converted from DC to AC by the DC / AC converter 23, and is output as AC power from the output terminal 27 and supplied to the load 8.

[0026] (DC / AC conversion section 23) The DC-AC conversion unit 23 is configured with an inverter that converts DC power into AC power. The inverter that constitutes the DC-AC conversion unit 23 has a switching element such as a transistor, and converts the DC power into AC power by switching this switching element.

[0027] DC / AC conversion unit 23 is installed near storage battery 22. The AC side of DC / AC conversion unit 23 is connected to output terminal 27, and the DC side is connected to storage battery 22 and AC / DC conversion unit 21. DC / AC conversion unit 23 converts DC power discharged from storage battery 22 into AC power, and outputs the AC power to output terminal 27. The AC power output to output terminal 27 is supplied to load 8.

[0028] (Bypass circuit 24) The bypass circuit 24 is composed of a switching element such as a contactor, a relay, or a power electronics semiconductor element that switches current. The bypass circuit 24 is disposed inside a housing that constitutes the uninterruptible power supply 2. One end of the bypass circuit 24 is connected to the auxiliary input terminal 26, and the other end is connected to the output terminal 27.

[0029] The bypass circuit 24 is controlled to be open or closed by the control unit 3. In the closed state, the bypass circuit 24 supplies AC power supplied from the auxiliary input terminal 26 to the output terminal 27. The AC power supplied to the output terminal 27 is supplied to the load 8.

[0030] (Cooling section 28) Cooling unit 28 is configured with a cooling fan driven by an electric motor. Cooling unit 28 is installed inside a housing constituting uninterruptible power supply 2, near AC-DC conversion unit 21 and DC-AC conversion unit 23. Cooling unit 28 cools AC-DC conversion unit 21 and DC-AC conversion unit 23 by rotating the cooling fan and causing air to flow.

[0031] (2-2) Configuration of detection unit 4 The detector 4 is configured by a device that combines a microphone that detects sound and an analog-to-digital converter. The detector 4 desirably has a plurality of microphones. The detector 4 is installed inside the housing that constitutes the uninterruptible power supply 2, near the cooling unit 28.

[0032] The detector 4 detects the operating sound of the power supply unit 20, performs analog-to-digital conversion, and outputs the analog-to-digital converted signal data related to the operating sound of the power supply unit 20 to the controller 3 as signal data A. The signal data A includes the sound generated by the cooling unit 28 of the power supply unit 20, the AC-DC converter 21, the DC The signal data includes at least one of the operation sound of the current / current conversion unit 23 and the environmental sound.

[0033] (2-3) Configuration of measurement unit 6 The measurement unit 6 is composed of a device that combines a temperature sensor such as a resistance thermometer or a thermocouple, a humidity sensor, a barometric pressure sensor, an electrical quantity measuring instrument, an analog-digital converter, and a timer. The measurement unit 6 is inside the housing that constitutes the uninterruptible power supply 2, and is installed near the AC-DC conversion unit 21, the storage battery 22, and the DC-AC conversion unit 23. The measurement unit 6 is connected to the input unit 31 of the control unit 3.

[0034] The measurement unit 6 outputs the temperature, humidity, air pressure, and amount of surge power received from when the uninterruptible power supply 2 started operating to the present to the input unit 31 of the control unit 3 as usage environment information B2, which is information indicating the environment in which the uninterruptible power supply 2 was used. The measurement unit 6 also outputs the operating time and output power from when the uninterruptible power supply 2 started operating to the present to the input unit 31 of the control unit 3 as usage history information B3, which is information indicating the progress of use of the uninterruptible power supply 2. The operating time refers to the actual operating time during which the uninterruptible power supply 2 actually operated. The operating time may also be the elapsed time from when the product was completed to the present, including the time when it was not operating.

[0035] (2-3) Configuration of control unit 3 The control unit 3 is composed of a microcomputer, a DSP (digital signal processor), etc. The control unit 3 is disposed in a housing constituting the uninterruptible power supply 2. The control unit 3 performs control for extracting the sound generated by the cooling unit 28 from the operating sound of the power supply unit 20. Signal data B (signal data related to the deterioration of the cooling unit 28) including cooling unit deterioration information B1, which is data related to the sound generated by the cooling unit 28 extracted by the control unit 3, is transmitted to the determination unit 5.

[0036] The control unit 3 also controls the AC / DC conversion unit 21, the DC / AC conversion unit 23, the cooling unit 28, and the bypass circuit 24 of the power supply unit 20. The control unit 3 has an input unit 31, an output unit 32, a transmission / reception unit 33, and a calculation unit .

[0037] (Input unit 31) The input unit 31 is composed of a message receiving circuit consisting of a port of a microcomputer, etc. The input side of the input unit 31 is connected to the detection unit 4 and the measurement unit 6, and the output side is connected to the calculation unit . The input unit 31 receives signal data A (signal data related to the operating sound of the power supply unit 20) output from the detection unit 4, and the usage environment information B2 and usage history information B3 output from the measurement unit 6, and outputs them to the calculation unit .

[0038] (Output unit 32) The output unit 32 is configured by a message transmission circuit consisting of a microcomputer port, etc. The input side of the output unit 32 is connected to the calculation unit 34, and the output side is connected to the AC / DC conversion unit 21, the DC / AC conversion unit 23, the cooling unit 28, and the bypass circuit 24 of the power supply unit 20.

[0039] The output unit 32 is controlled by the calculation unit 34, and transmits to the AC-DC conversion unit 21, the DC-AC conversion unit 23, and the cooling unit 28 an operation command C instructing them to operate and a stop command D instructing them to stop.

[0040] (Transmitter / receiver 33) The transmitting / receiving unit 33 is configured with a message transmitting / receiving circuit that is made up of a port of a microcomputer, etc. The input side of the transmitting / receiving unit 33 is connected to the calculation unit 34, and the output side is connected to the judgment unit 5. The transmitting / receiving unit 33 transmits signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3, which are generated by the calculation unit 34, to the judgment unit 5. The transmitter / receiver 33 also receives from the determination unit 5 an operation command C instructing the AC / DC converter 21, the DC / AC converter 23, and the cooling unit 28 to operate, and a stop command D instructing them to stop.

[0041] (Computation unit 34) The calculation unit 34 is configured with a CPU of a microcomputer or a DSP (digital signal processor), etc. The calculation unit 34 has a computer program built in, which will be described later. The calculation unit 34 is connected to the input unit 31, the output unit 32, and the transmission / reception unit 33. The calculation unit 34 performs the following calculations and controls.

[0042] Control of input unit 31 The calculation unit 34 controls the input unit 31, and receives signal data A (signal data relating to the operating sound of the power supply unit 20) from the detection unit 4, and usage environment information B2 and usage history information B3 from the measurement unit 6.

[0043] Control of the output section 32 The calculation unit 34 controls the output unit 32 to transmit to the AC / DC conversion unit 21, the DC / AC conversion unit 23, and the cooling unit 28 an operation command C instructing them to operate and a stop command D instructing them to stop.

[0044] Control of the transmitter / receiver 33 The calculation unit 34 controls the transmission / reception unit 33 to transmit signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 to the determination unit 5. The calculation unit 34 performs calculations based on signal data A (signal data related to the operating sound of the power supply unit 20) received from the detection unit 4, and creates cooling unit deterioration information B1. The calculation unit 34 also controls the transmission / reception unit 33 to receive from the determination unit 5 an operation command C instructing the AC-DC conversion unit 21, the DC-AC conversion unit 23, and the cooling unit 28 to operate, and a stop command D instructing them to stop.

[0045] Configuration of the judgment unit 5 The configuration of the judgment unit 5 is shown in Fig. 3. The judgment unit 5 is a device that judges the deterioration of the cooling unit 28 of the uninterruptible power supply 2. The judgment unit 5 is constituted by a personal computer or the like. The judgment unit 5 has a transmitting / receiving unit 51, a memory unit 52, a display unit 53, an alarm output unit 54, a transmitting / receiving unit 55, and a calculation unit 56. The judgment unit 5 is installed in a power management room of a power consumer, or the like. The judgment unit 5 may be referred to as a deterioration judgment device for an uninterruptible power supply in the claims.

[0046] (Transmitter / receiver 51) The transmitting / receiving unit 51 is configured by a communication port of a personal computer or the like. The transmitting / receiving unit 51 is connected to the transmitting / receiving unit 33 (33a, 33b to 33n) of the control unit 3 (3a, 3b to 3n) of the multiple uninterruptible power supplies 2 (2a, 2b to 2n). The transmitting / receiving unit 51 receives signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 from the transmitting / receiving unit 33 of the control unit 3 via a local communication line. The transmitting / receiving unit 51 also transmits to the uninterruptible power supply 2 an operation command C instructing the AC / DC conversion unit 21, the DC / AC conversion unit 23, and the cooling unit 28 to operate, and a stop command D instructing them to stop. The transmitting / receiving operation of the transmitting / receiving unit 51 is controlled by the calculation unit 56.

[0047] (Storage unit 52) The storage unit 52 is controlled by a hardware calculation unit 56 of a personal computer constituting the determination unit 5. The storage unit 52 stores signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 for each of the multiple uninterruptible power supply devices 2, and a deterioration curve F serving as a criterion for determining deterioration of the cooling unit 28.

[0048] (Display section 53) The display unit 53 is configured with a display device such as a liquid crystal panel. The display unit 53 displays the deterioration state of the cooling units 28 of the multiple uninterruptible power supplies 2. The display of the display unit 53 is controlled by the calculation unit 56.

[0049] (Alarm output unit 54) The warning output unit 54 is composed of a warning device that outputs a warning signal by a warning sound or a warning display. The calculation unit 56 creates a deterioration curve F that indicates deterioration of the cooling unit 28 over time, based on usage history information B3 received from multiple uninterruptible power supplies 2. The deterioration of the cooling unit based on cooling unit deterioration information B1 is based on cooling unit deterioration information B1 received from multiple uninterruptible power supplies 2. The deterioration curve F is created for each usage environment based on usage environment information B2.

[0050] The calculation unit 56 determines that the cooling unit 28 has deteriorated when the cooling unit deterioration information B1 of the uninterruptible power supply 2 that is the subject of the deterioration state judgment is not within a predetermined numerical value for the created deterioration curve F. The deterioration judgment is made based on the deterioration curve F that matches the usage environment information B2 in which the uninterruptible power supply 2 that is the subject of the deterioration state judgment was used.

[0051] When the calculation unit 56 determines that the cooling unit 28 has deteriorated, an alarm signal J according to the degree of deterioration is output to the alarm output unit 54. Based on the alarm signal J sent from the calculation unit 56, the alarm output unit 54 outputs an alarm by an alarm sound or an alarm display.

[0052] (Transmitter / receiver 55) The transmitting / receiving unit 55 is configured with a communication port of a personal computer or the like. The transmitting / receiving unit 55 is connected to a communication line (not shown in the figure) such as the Internet. The transmitting / receiving unit 55 communicates with other computers or other devices via the communication line. The transmitting / receiving unit 55 transmits the deterioration state of the cooling units 28 of the multiple uninterruptible power supplies 2 in response to a request signal transmitted from the other computers or other devices. The transmitting / receiving operation of the transmitting / receiving unit 55 is controlled by the calculation unit 56.

[0053] (Computation unit 56) The calculation unit 56 is configured with a CPU of a personal computer that constitutes the judgment unit 5. The calculation unit 56 has a built-in computer program described later. The calculation unit 56 is connected to the transmission / reception unit 51, the storage unit 52, the display unit 53, the alarm output unit 54, and the transmission / reception unit 55. The calculation unit 56 performs the following calculations and controls.

[0054] Control of the transmitter / receiver 51 The calculation unit 56 controls the transmission / reception unit 51 to receive signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 from the transmission / reception units 33 of the control units 3 of multiple uninterruptible power supplies 2 via the local communication lines. The calculation unit 56 also controls the transmission / reception unit 51 to transmit to the uninterruptible power supply 2 an operation command C instructing the AC / DC conversion unit 21, the DC / AC conversion unit 23, and the cooling unit 28 to operate, and a stop command D instructing them to stop.

[0055] Control of the memory unit 52 The calculation unit 56 controls the memory unit 52 to store and recall signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 for each of the multiple uninterruptible power supply devices 2, and a deterioration curve F that serves as a criterion for determining deterioration of the cooling unit 28.

[0056] Control of the display unit 53 The calculation unit 56 controls the display unit 53 to display the deterioration state of the cooling units 28 of the multiple uninterruptible power supplies 2.

[0057] Control of the alarm output unit 54 The calculation unit 56 controls the alarm output unit 54, and when it determines that the cooling unit 28 has deteriorated, it outputs an alarm signal J according to the degree of deterioration to the alarm output unit 54. The alarm output unit 54 outputs an alarm by an alarm sound or an alarm display based on the alarm signal J.

[0058] Control of the transmitter / receiver 55 The calculation unit 56 controls the transmission / reception unit 55 to communicate with other devices such as computers connected via a communication line. The calculation unit 56 controls the transmission / reception unit 55 to receive request signals transmitted from other devices such as computers. In response to the request signals, the calculation unit 56 controls the transmission / reception unit 55 to transmit the deterioration states of the cooling units 28 of the multiple uninterruptible power supplies 2.

[0059] [1-2. Effect] Next, an outline of the operation of the uninterruptible power supply system 1 of the present embodiment will be described with reference to FIGS.

[0060] [A. Operation of Determination Unit 5] The determination unit 5 uses the deterioration curve creation process to create a deterioration curve F that indicates the deterioration of the cooling unit 28 of the uninterruptible power supply 2. The deterioration curve F is created for each usage environment based on the usage environment information B2.

[0061] Furthermore, the judgment unit 5 judges the deterioration state of the cooling units 28 of the multiple uninterruptible power supplies 2 in stages by a deterioration judgment process based on the created deterioration curve F. The judgment unit 5 performs a mild deterioration process or a severe deterioration process according to the stage of the deterioration state judged by the deterioration judgment process.

[0062] The calculation unit 56 of the judgment unit 5 executes the following processes. The calculation unit 56 of the judgment unit 5 operates according to the programs shown in Figs. 4 to 7. The programs shown in Figs. 4 to 7 are built into the calculation unit 56 of the judgment unit 5. Each of the programs shown in Figs. 4 to 7 is repeatedly and continuously executed at regular intervals by the calculation unit 56 of the judgment unit 5.

[0063] Deterioration curve creation process) 4 shows a program relating to the deterioration curve creation process executed by the calculation unit 56. The program relating to the deterioration curve creation process is repeatedly and continuously executed by the calculation unit 56 of the determination unit 5 at regular intervals.

[0064] (Step S01: Receive signal data B from uninterruptible power supply 2) The calculation unit 56 receives signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 transmitted by the multiple uninterruptible power supply devices 2 via the transmission / reception unit 51. The received signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 is accumulated and stored in the storage unit 52 for each of the multiple uninterruptible power supply devices 2 (2a, 2b to 2n). The program related to the deterioration curve creation process is repeatedly and continuously executed at regular intervals by the calculation unit 56 of the judgment unit 5, so that the signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 is accumulated and stored in the storage unit 52.

[0065] The cooling unit deterioration information B1 is information indicating deterioration of the cooling unit 28 of the uninterruptible power supply 2. In this embodiment, the cooling unit deterioration information B1 is data related to sound generated by the cooling unit 28. The cooling unit deterioration information B1 may be information related to at least one of sound generated by the cooling unit 28, vibration, current consumption, and AE (acoustic emission: sound waves or elastic waves emitted before deformation or damage of a material occurs) of the power supply unit 20.

[0066] The usage environment information B2 is information that indicates the environment in which the uninterruptible power supply 2 is used. The usage environment information B2 is information about at least one of the temperature, humidity, air pressure, and surge power received amount from when the uninterruptible power supply 2 started operating to the present. The usage environment information B2 is transmitted from the multiple uninterruptible power supplies 2 as signal data B together with the cooling unit deterioration information B1.

[0067] The usage history information B3 is information that indicates the progress of usage of the uninterruptible power supply 2. The usage history information B3 is information about at least one of the operation time and the output power amount from when the uninterruptible power supply 2 started operating to the present time. The usage history information B3 is transmitted from multiple uninterruptible power supplies 2 as signal data B together with the cooling unit deterioration information B1.

[0068] (Step S02: Classify cooling unit deterioration information B1 based on usage environment information B2) Next, the calculation unit 56 classifies the cooling unit deterioration information B1 of the multiple uninterruptible power supplies 2 based on the usage environment information B2 stored in the storage unit 52. For example, the calculation unit 56 calculates the average usage temperature for each of the multiple uninterruptible power supplies 2 based on the usage environment information B2. For example, based on the usage environment information B2, the cooling unit deterioration information B1 transmitted from the multiple uninterruptible power supplies 2 is classified into average temperatures T1 = 0°C to 10°C, T2 = 10°C to 20°C, T3 = 20°C to 30°C, T4 = 30°C to 40°C, and T5 = 40°C to 50°C. The usage environment information B2 is attached to each cooling unit deterioration information B1.

[0069] (Step S03: Create a deterioration curve F based on the cooling part deterioration information B1) Next, the calculation unit 56 creates a deterioration curve F based on the cooling unit deterioration information B1 classified in step S02. An example of the deterioration curve F is shown in Fig. 9. The deterioration curve F is created for each of the usage environment information B2 classified in step S02. For example, the deterioration curve F is created for each of average temperatures T1 = 0°C to 10°C, T2 = 10°C to 20°C, T3 = 20°C to 30°C, T4 = 30°C to 40°C, and T5 = 40°C to 50°C.

[0070] The deterioration curve F is a graph showing the history of deterioration of the cooling unit 28 of the uninterruptible power supply 2, representing the cooling unit deterioration information B1 against the usage history information B3. For example, the deterioration curve F is a graph showing the sound generated by the cooling unit 28 of the uninterruptible power supply 2 against the operating time of the cooling unit 28 of the uninterruptible power supply 2. The operating time of the cooling unit 28 of the uninterruptible power supply 2 corresponds to the usage history information B3, and the sound generated by the cooling unit 28 corresponds to the cooling unit deterioration information B1. An average value of the cooling unit deterioration information B1 of the cooling units 28 of a plurality of uninterruptible power supplies 2 is used for the deterioration curve F. The created deterioration curve F is stored in the memory unit 52.

[0071] At the beginning of operation, average sound data for each of the multiple uninterruptible power supplies 2 (2a, 2b to 2n) or for the corresponding models is stored in the storage unit 52. Cooling unit deterioration information B1 (information indicating deterioration of the cooling unit 28) related to the signal data B (signal data related to deterioration of the cooling unit 28) is, for example, a logarithmic spectrum after volume or frequency conversion. The difference between the data at the beginning of operation and the current data related to the cooling unit deterioration information B1 (information indicating deterioration of the cooling unit 28) is calculated as the "deterioration level."

[0072] As an example, a deterioration curve F showing a "deterioration level" when the cooling unit deterioration information B1 (information showing deterioration of the cooling unit 28) is a sound volume is shown in Fig. 9. Alternatively, sound data at the beginning of operation may be pre-learned by an autoencoder, and sound data at the current time may be input to the autoencoder, and the difference between the cooling unit deterioration information B1 (information showing deterioration of the cooling unit 28) at the beginning of operation and at the current time may be calculated as the "deterioration level". Alternatively, the deterioration curve F may be created by modeling a multidimensional polynomial function by minimizing squared errors from a plurality of data collected in advance.

[0073] The above is the deterioration curve creation process executed by the determination unit 5. By the deterioration curve creation process, a deterioration curve F indicating average deterioration information of each of the cooling units 28a, 28b to 28n of the uninterruptible power supplies 2a, 2b to 2n is created.

[0074] (B. Deterioration judgment processing) 5 shows a program for the deterioration determination process executed by the calculation unit 56. The program for the deterioration determination process is repeatedly and continuously executed at regular intervals by the calculation unit 56 of the determination unit 5. The calculation unit 56 determines the degree of deterioration of the cooling unit 28 of the uninterruptible power supply 2 that is the subject of the deterioration state determination by the deterioration determination process. A case in which the uninterruptible power supply 2a is the subject of the deterioration state determination will be described below.

[0075] (Step S11: Receive signal data B from uninterruptible power supply 2) The calculation unit 56 receives signal data B (signal data related to deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 from the uninterruptible power supply 2a whose deterioration state is to be determined via the transmission / reception unit 51.

[0076] (Step S12: Select the deterioration curve F) Next, the calculation unit 56 selects a deterioration curve F corresponding to the usage environment information B2 of the uninterruptible power supply 2a that is the target of the deterioration state judgment received in step S11. The deterioration curve F is created by a deterioration curve creation process for each of average temperatures T1=0°C to 10°C, T2=10°C to 20°C, T3=20°C to 30°C, T4=30°C to 40°C, and T5=40°C to 50°C, for example.

[0077] The calculation unit 56 grasps the operating temperature at which the uninterruptible power supply 2a is used based on the operating environment information B2 of the uninterruptible power supply 2a that is the subject of the deterioration state judgment, and selects the deterioration curve F corresponding to the operating temperature. For example, if the operating temperature at which the uninterruptible power supply 2a is used is 25°C, the deterioration curve F for T3=20°C to 30°C is selected.

[0078] (Step S13: Determine the degree of deterioration of the cooling unit 28) Next, the calculation unit 56 determines the degree of deterioration of the cooling unit 28 of the uninterruptible power supply 2a, which is the target of the deterioration state determination, based on the cooling unit deterioration information B1 received in step S11 and the deterioration curve F selected in step S12. The calculation unit 56 plots the deterioration level L1 related to the cooling unit deterioration information B1 of the uninterruptible power supply 2a, which is the target of the deterioration state determination received in step S11, on the deterioration curve F selected in step S12, and compares the cooling unit deterioration information B1 with the deterioration curve F. The deterioration level L1 related to the cooling unit deterioration information B1 is, for example, the volume level of the sound generated by the cooling unit 28 of the uninterruptible power supply 2a, which is the target of the deterioration state determination.

[0079] When the deterioration level L1 of the cooling unit deterioration information B1 is less than the threshold value m1 in the deterioration curve F, the calculation unit 56 determines that the deterioration of the cooling unit 28 is within the allowable deterioration range.

[0080] When the deterioration level L1 of the cooling unit deterioration information B1 is equal to or greater than the threshold value m1 and less than the threshold value m2 in the deterioration curve F, the calculation unit 56 determines that the deterioration of the cooling unit 28 is mild.

[0081] When the deterioration level L1 of the cooling unit deterioration information B1 is equal to or greater than the threshold value m2 in the deterioration curve F, the calculation unit 56 determines that the deterioration of the cooling unit 28 is severe.

[0082] The above is the degradation judgment process executed by the judgment unit 5. The degradation judgment process judges whether the degradation of the cooling unit 28 of the uninterruptible power supply 2a is mildly deteriorated, severely deteriorated, or within the allowable degradation range. If it is judged that the cooling unit 28 of the uninterruptible power supply 2a is mildly deteriorated, the judgment unit 5 executes mild degradation processing, and if it is judged that it is severely deteriorated, the judgment unit 5 executes severe degradation processing. If it is judged to be within the allowable degradation range, the cooling unit 28 of the uninterruptible power supply 2a continues normal operation.

[0083] (Ha, mild deterioration treatment) When it is determined by the deterioration determination process that the deterioration of the cooling unit 28 of the uninterruptible power supply 2a is mildly deteriorated, the calculation unit 56 performs the following process as mild deterioration processing.

[0084] (Step S21: Control is performed to continue the operation of the cooling unit 28) The calculation unit 56 controls the continuation of operation of the cooling unit 28 of the uninterruptible power supply 2a that is the subject of the degradation state judgment. The calculation unit 56 transmits an operation command C3 (operation command specifying the operation of the cooling unit 28) to the uninterruptible power supply 2a via the transmission / reception unit 51, instructing the cooling unit 28 to continue operating. The control unit 3 of the uninterruptible power supply 2a receives the operation command C3 instructing the cooling unit 28 to continue operating, and operates the cooling unit 28.

[0085] If the cooling unit 28 is already operating, the operation of the cooling unit 28 may be allowed to continue without transmitting the operation command C3.

[0086] (Step S22: Display unit 53 displays that the deterioration is minor) Next, the calculation unit 56 causes the display unit 53 to display that the cooling unit 28 of the uninterruptible power supply 2a is slightly deteriorated. The calculation unit 56 also causes the display unit 53 to display that the cooling unit 28 of the uninterruptible power supply 2a is operating.

[0087] (Step S23: Determine whether the temperature inside the uninterruptible power supply 2a has reached or exceeded temperature T1) Next, the calculation unit 56 judges whether the temperature inside the uninterruptible power supply 2a has reached or exceeded a preset temperature T1. The calculation unit 56 receives data on the temperature inside the uninterruptible power supply 2a included in the usage environment information B2 (information indicating the environment in which the uninterruptible power supply 2 is used) in step S11. The calculation unit 56 judges whether the temperature inside the uninterruptible power supply 2a has reached or exceeded a preset temperature T1 based on the data on the temperature inside the uninterruptible power supply 2a included in the usage environment information B2 (information indicating the environment in which the uninterruptible power supply 2 is used).

[0088] 4 to 7 are executed repeatedly and continuously at regular time intervals, and a determination is periodically made as to whether the internal temperature of the uninterruptible power supply 2a has reached or exceeded a preset temperature T1. The preset temperature T1 is the temperature at which the uninterruptible power supply 2a will break down if it is continued to be used. The temperature T1 is set in the calculation unit 34 before the uninterruptible power supply 2a starts operating.

[0089] If it is determined that the temperature is equal to or higher than T1 (YES in step S23), the process proceeds to step S25. If it is not determined that the temperature is equal to or higher than T1 (NO in step S23), the process proceeds to step S24.

[0090] (Step S24: Determine whether the output power of the uninterruptible power supply 2a is equal to or greater than the power W1) Next, the calculation unit 56 determines whether the output power of the uninterruptible power supply 2a has reached or exceeded the power W1. The calculation unit 56 receives data relating to the output power of the uninterruptible power supply 2a included in the usage history information B3 (information indicating the progress of use of the uninterruptible power supply 2) in step S11. The calculation unit 56 determines whether the output power of the uninterruptible power supply 2a has reached or exceeded the preset power W1 based on the data relating to the output power of the uninterruptible power supply 2a included in the usage environment information B3.

[0091] 4 to 7 are executed repeatedly and continuously at regular time intervals, and a determination is periodically made as to whether the output power of the uninterruptible power supply 2a has reached or exceeded a preset power W1. The preset power W1 is the power at which the uninterruptible power supply 2a will break down due to a rise in temperature if it is continued to be used. The power W1 is set in the calculation unit 34 before the uninterruptible power supply 2a starts operating.

[0092] If it is determined that the power has reached or exceeded the power W1 (YES in step S24), the process proceeds to step S25. If it is not determined that the power has reached or exceeded the power W1 (NO in step S24), the series of programs relating to the mild deterioration process is terminated.

[0093] (Step S25: Control is performed to stop the operation of the uninterruptible power supply 2a) If it is determined in step S23 that the internal temperature of the uninterruptible power supply 2a has reached or exceeded a preset temperature T1, or if it is determined in step S24 that the output power of the uninterruptible power supply 2a has reached or exceeded a preset power W1, the calculation unit 56 performs control to stop the operation of the uninterruptible power supply 2a.

[0094] The calculation unit 56 transmits a stop command D including a stop command D1 (a stop command instructing the AC-DC conversion unit 21 to stop operation), a stop command D2 (a stop command instructing the DC-AC conversion unit 23 to stop operation), and a stop command D3 (a stop command instructing the cooling unit 28 to stop operation) to the uninterruptible power supply 2a via the transmission / reception unit 51.

[0095] The control unit 3 of the uninterruptible power supply 2a receives the stop command D. The control unit 3 receives the stop command D1 and stops the operation of the AC-DC conversion unit 21, and receives the stop command D2 and stops the operation of the DC-AC conversion unit 23. In addition, the control unit 3 receives the stop command D3 and stops the operation of the cooling unit 28.

[0096] (Step S26: Control is performed to operate the uninterruptible power supply 2b) Next, the calculation unit 56 controls the operation of the uninterruptible power supply 2b. The calculation unit 56 transmits a power supply command H to the uninterruptible power supply 2b via the transmission / reception unit 51.

[0097] The control unit 3 of the uninterruptible power supply 2b receives the power supply command H. The control unit 3 receives the power supply command H and operates the AC-DC conversion unit 21, the DC-AC conversion unit 23, and the cooling unit 28. As a result, power is supplied from the uninterruptible power supply 2b to the load 8a.

[0098] (Step S27: Output an alarm from the alarm output unit 54) Next, the calculation unit 56 transmits the alarm signal J to the alarm output unit 54. The alarm output unit 54 outputs an alarm indicating that the operation of the uninterruptible power supply 2a has stopped by sounding and displaying an alarm. After that, the calculation unit 56 ends the series of programs.

[0099] The above is the operation of the determination unit 5 regarding the mild deterioration process. As described above, the determination unit 5 executes the mild deterioration process.

[0100] (D. Treatment of severe deterioration) When it is determined by the degradation determination process that the degradation of the cooling unit 28 of the uninterruptible power supply 2a is severely deteriorated, the calculation unit 56 performs the following process as severe degradation processing.

[0101] (Step S31: Control is performed to stop the operation of the uninterruptible power supply 2a) When the deterioration of the cooling unit 28 of the uninterruptible power supply 2a is determined to be severe by the deterioration determination process, the calculation unit 56 performs control to stop the operation of the uninterruptible power supply 2a.

[0102] The calculation unit 56 transmits a stop command D including a stop command D1 (a stop command instructing the AC-DC conversion unit 21 to stop operation), a stop command D2 (a stop command instructing the DC-AC conversion unit 23 to stop operation), and a stop command D3 (a stop command instructing the cooling unit 28 to stop operation) to the uninterruptible power supply 2a via the transmission / reception unit 51.

[0103] The control unit 3 of the uninterruptible power supply 2a receives the stop command D. The control unit 3 receives the stop command D1 and stops the operation of the AC-DC conversion unit 21, and receives the stop command D2 and stops the operation of the DC-AC conversion unit 23. In addition, the control unit 3 receives the stop command D3 and stops the operation of the cooling unit 28.

[0104] (Step S32: Control is performed to operate the uninterruptible power supply 2b) Next, the calculation unit 56 controls the operation of the uninterruptible power supply 2b. The calculation unit 56 transmits a power supply command H to the uninterruptible power supply 2b via the transmission / reception unit 51.

[0105] The control unit 3 of the uninterruptible power supply 2b receives the power supply command H. The control unit 3 receives the power supply command H and operates the AC-DC conversion unit 21, the DC-AC conversion unit 23, and the cooling unit 28. As a result, power is supplied from the uninterruptible power supply 2b to the load 8a.

[0106] (Step S33: Output an alarm from the alarm output unit 54) Next, the calculation unit 56 transmits the alarm signal J to the alarm output unit 54. The alarm output unit 54 outputs an alarm indicating that the operation of the uninterruptible power supply 2a has stopped by sounding and displaying an alarm. After that, the calculation unit 56 ends the series of programs.

[0107] The above is the operation of the determination unit 5 regarding the severe deterioration processing. As described above, the determination unit 5 executes the severe deterioration processing.

[0108] [B. Operation of the control unit 3 of the uninterruptible power supply 2] The control unit 3 of the uninterruptible power supply 2 extracts the sound generated by the cooling unit 28 of the uninterruptible power supply 2 and transmits it to the determination unit 5 as cooling unit deterioration information B1 in the signal data B (signal data related to the sound generated by the cooling unit). The control unit 3 of the uninterruptible power supply 2 also includes usage environment information B2 and usage history information B3 in the signal data B (signal data related to the sound generated by the cooling unit) and transmits it to the determination unit 5.

[0109] In addition, the control unit 3 of the uninterruptible power supply 2 controls the operations of the AC / DC conversion unit 21, the DC / AC conversion unit 23, and the cooling unit 28 of the uninterruptible power supply 2 depending on the stage of deterioration judged by the judgment unit 5.

[0110] The calculation unit 34 of the control unit 3 of the uninterruptible power supply 2 executes the following processes. The calculation unit 34 of the control unit 3 operates according to the program shown in Fig. 8. The program shown in Fig. 8 is built into the calculation unit 34 of the control unit 3. The program shown in Fig. 8 is repeatedly executed by the calculation unit 34 of the control unit 3 at regular intervals.

[0111] (Step R01: Receive signal data A from the detection unit 4) First, the calculation unit 34 receives signal data A (signal data related to the operating sound of the power supply unit 20) from the detection unit 4 via the input unit 31. The detection unit 4 constantly detects the operating sound of the power supply unit 20, performs analog-to-digital conversion, and outputs the signal data related to the operating sound of the power supply unit 20 as signal data A. The signal data A includes signal data related to the sound generated by the cooling unit 28 of the power supply unit 20, the operating sounds of the AC-DC conversion unit 21 and the DC-AC conversion unit 23, and environmental sounds. The signal data A (signal data related to the operating sound of the power supply unit 20) is constantly output from the detection unit 4.

[0112] (Step R02: Extract the sound generated by the cooling unit 28 and create cooling unit deterioration information B1) Next, the calculation unit 34 extracts the sound generated by the cooling unit 28 based on the signal data A (signal data related to the operation sound of the power supply unit 20) received in step R01. As described above, the signal data A (signal data related to the operation sound of the power supply unit 20) includes the sound generated by the cooling unit 28, the operation sounds of the AC-DC conversion unit 21, and the DC-AC conversion unit 23.

[0113] The calculation unit 34 filters the signal data A (signal data related to the operation sound of the power supply unit 20) received in step R01 using a fast Fourier transform or the like, and extracts the sound generated by the cooling unit 28. Alternatively, when the detection unit 4 has a plurality of microphones, the calculation unit 34 performs processing such as a beamforming process with enhanced directivity toward the cooling unit 28, and a sound source separation process based on an independent component analysis (ICA) or an independent vector analysis (IVA), and removes the operation sound of the power supply unit 20 from the signal data A and extracts the sound generated by the cooling unit 28. The extracted and transmitted data related to the sound generated by the cooling unit 28 is created as cooling unit deterioration information B1.

[0114] (Step R03: Receive the usage environment information B2 and usage history information B3) Next, the calculation unit 34 receives the usage environment information B2 and usage history information B3 from the measurement unit 6 via the input unit 31. The measurement unit 6 outputs the temperature, humidity, air pressure, and amount of surge power received from when the uninterruptible power supply 2 started operating to the present time to the input unit 31 of the control unit 3 as usage environment information B2, which is information indicating the environment in which the uninterruptible power supply 2 was used.

[0115] In addition, the measurement unit 6 outputs the operating time and output power from when the uninterruptible power supply 2 started operating to the present to the input unit 31 of the control unit 3 as usage history information B3, which is information indicating the progress of usage of the uninterruptible power supply 2.

[0116] (Step R04: Transmit signal data B) Next, the calculation unit 34 includes the cooling unit deterioration information B1 created in step R02 and the usage environment information B2 and usage history information B3 received in step R03 in signal data B (signal data regarding deterioration of the cooling unit 28), and transmits the signal data B to the judgment unit 5 via the transmission unit 33.

[0117] (Step R05: Determine whether operation command C or stop command D has been received) Next, the calculation unit 34 judges whether the operation command C or the stop command D has been received from the judgment unit 5 via the transmission / reception unit 33.

[0118] If it is determined that the operation command C or the stop command D has been received (YES in step R05), the process proceeds to step R06. If it is not determined that the operation command C or the stop command D has been received (NO in step R05), the series of programs ends.

[0119] (Step R06: Control each part according to the command) If it is determined in step R05 that the operation command C or the stop command D has been received, the calculation unit 34 controls the operation of the AC-DC conversion unit 21, the DC-AC conversion unit 23, and the cooling unit 28 in accordance with the operation command C or the stop command D transmitted from the judgment unit 5.

[0120] For example, when an operation command C3 instructing the cooling unit 28 to continue operating is received, the control unit 3 The calculation unit 34 performs control so that the cooling unit 28 continues to operate.

[0121] Furthermore, when a stop command D1 instructing to stop the operation of the AC-DC conversion unit 21 is received, the calculation unit 34 of the control unit 3 performs control to stop the operation of the AC-DC conversion unit 21. When a stop command D2 instructing to stop the operation of the DC-AC conversion unit 23 is received, the calculation unit 34 of the control unit 3 performs control to stop the operation of the DC-AC conversion unit 23. When a stop command D3 instructing to stop the operation of the cooling unit 28 is received, the calculation unit 34 of the control unit 3 performs control to stop the operation of the cooling unit 28.

[0122] The above is the operation of the calculation unit 34 of the control unit 3. As described above, based on the signal data A (signal data related to the operating sound of the power supply unit 20), the sound generated by the cooling unit 28 is extracted, and signal data B (signal data related to the deterioration of the cooling unit 28) including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 is transmitted to the determination unit 5. In addition, the control unit 3 of the uninterruptible power supply 2 controls the operations of the AC-DC conversion unit 21, the DC-AC conversion unit 23, and the cooling unit 28 of the uninterruptible power supply 2 according to the stage of the deterioration state determined by the determination unit 5.

[0123] [1-3. Effects] (1) According to this embodiment, the uninterruptible power supply system 1 includes an uninterruptible power supply 2 that transmits cooling unit deterioration information indicating deterioration of the cooling unit 28, and a judgment unit 5 that receives the cooling unit deterioration information from the uninterruptible power supply 2 and judges, in stages, the deterioration state of the cooling unit 28 of the uninterruptible power supply 2 based on the received cooling unit deterioration information. Therefore, it is possible to provide an uninterruptible power supply system 1 that can judge the degree of deterioration of the cooling unit 28 in stages.

[0124] According to the uninterruptible power supply system 1, the deterioration state of the cooling section 28 of the uninterruptible power supply device 2 can be judged in stages, so that an operator can grasp the deterioration state of the uninterruptible power supply system 1 before it leads to a breakdown, and can perform maintenance on the uninterruptible power supply system 1 before it leads to a breakdown.

[0125] (2) According to this embodiment, when the judgment unit 5 of the uninterruptible power supply system 1 determines that the deterioration state of the cooling unit 28 of the uninterruptible power supply 2 is mild, the judgment unit 5 controls the uninterruptible power supply 2 to continue operating the cooling unit 28. Therefore, even if deterioration of the cooling unit 28 of the uninterruptible power supply 2 is detected, power supply to the load 8 can be continued.

[0126] Even if it is determined that the cooling unit 28 of the uninterruptible power supply 2 has deteriorated, it may take time to arrange for parts, etc., and the uninterruptible power supply system may not be repaired promptly. In such a case, the uninterruptible power supply system 2 continues to operate and supplies power to the load 8 until repairs are made.

[0127] (3) According to this embodiment, the judgment unit 5 of the uninterruptible power supply system 1 controls the uninterruptible power supply 2 to stop the cooling unit 28 and stop the power supply to the load 8 when the temperature of the uninterruptible power supply 2 is equal to or higher than a predetermined temperature. Therefore, even if the cooling unit 28 of the uninterruptible power supply 2 deteriorates, the risk of causing a serious accident such as a fire can be reduced.

[0128] (4) According to this embodiment, the judgment unit 5 of the uninterruptible power supply system 1 controls the uninterruptible power supply 2 to stop the cooling unit 28 and stop the power supply to the load 8 when the output power of the uninterruptible power supply 2 is equal to or greater than a predetermined power. Therefore, even if the cooling unit 28 of the uninterruptible power supply 2 deteriorates, the risk of causing a serious accident such as a fire can be reduced.

[0129] (5) According to this embodiment, when the judgment unit 5 of the uninterruptible power supply system 1 judges that the cooling unit 28 of the uninterruptible power supply 2 is severely deteriorated, the judgment unit 5 controls the uninterruptible power supply 2 to stop the cooling unit 28 and stop the power supply to the load 8. Therefore, even if the cooling unit 28 of the uninterruptible power supply 2 is deteriorated, the risk of causing a serious accident such as a fire can be reduced.

[0130] (6) According to this embodiment, when the judgment unit 5 of the uninterruptible power supply system 1 controls the uninterruptible power supply 2 to stop the power supply to the load 8, the judgment unit 5 controls a power source provided outside the uninterruptible power supply 2 to operate and supply power to the load 8. Therefore, even when the operation of the uninterruptible power supply 2 is stopped, the supply of power to the load 8 continues.

[0131] (7) According to this embodiment, the deterioration curve F created by the deterioration curve creation process of the uninterruptible power supply system 1 is created based on the cooling unit deterioration information B1. The cooling unit deterioration information B1 is information relating to at least one of the noise, vibration, current consumption, and AE (acoustic emission) of the cooling unit 28 of the uninterruptible power supply device 2. Therefore, the deterioration of the cooling unit 28 can be judged based on detailed information, and the deterioration of the cooling unit 28 can be judged more accurately.

[0132] (8) According to this embodiment, the deterioration curve F created by the deterioration curve creation process of the uninterruptible power supply system 1 is created based on the cooling unit deterioration information B1 transmitted from multiple uninterruptible power supply devices 2, and the cooling unit deterioration information B1 is accumulated and stored in the computer cloud. Therefore, the deterioration curve F is created based on the cooling unit deterioration information B1 transmitted from a larger number of uninterruptible power supply devices 2, and the deterioration of the cooling unit 28 can be determined more accurately.

[0133] Other embodiments Although the embodiments including the modified examples 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, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents as well as in the scope and gist of the invention. The following is an example.

[0134] (1) In the above embodiment, the uninterruptible power supply system 1 includes uninterruptible power supply devices 2a, 2b to 2n, where n is an arbitrary quantity. The uninterruptible power supply system 1 may include a single or multiple uninterruptible power supply devices 2.

[0135] The deterioration curve F is created based on signal data B related to the uninterruptible power supplies 2a, 2b to 2n, but it may also be created based on signal data B of an uninterruptible power supply 2 installed at a customer facility other than the customer that has the uninterruptible power supply 2a, 2b to 2n.

[0136] (2) In the above embodiment, the signal data B (signal data related to the deterioration of the cooling unit 28) including the cooling unit deterioration information B1, the usage environment information B2, and the usage history information B3 transmitted from the uninterruptible power supply 2 is transmitted to the transceiver unit 51 of the judgment unit 5, but it may also be transmitted to a computer cloud first and then accumulated and stored.

[0137] The signal data B including cooling unit deterioration information B1, usage environment information B2, and usage history information B3 transmitted from the uninterruptible power supply 2 and stored in the computer cloud is received by the transmitter / receiver 51 via a communication line such as the Internet. With this configuration, the signal data B related to the uninterruptible power supply 2 of the consumer can be easily used by uninterruptible power supply systems 1 installed elsewhere.

[0138] (3) In the above embodiment, the determination unit 5 is provided outside the uninterruptible power supply 2. However, the determination unit 5 may be provided inside the uninterruptible power supply 2.

[0139] (4) In the above embodiment, the AC-DC conversion unit 21 is configured with a converter that converts AC power to DC power, but the configuration of the AC-DC conversion unit 21 is not limited to this. The AC-DC conversion unit 21 may be configured with a bidirectional inverter-converter that converts AC power to DC power and DC power to AC power. When the AC-DC conversion unit 21 operates as an inverter, the DC power discharged from the storage battery 22 may be converted to AC power and output to the power supply line 91 via the input terminal 25. With this configuration, the power of the storage battery 22 is utilized for energy conservation.

[0140] (5) In the above embodiment, the cooling unit 28 is configured by a cooling fan driven by an electric motor, but the configuration of the cooling unit 28 is not limited to this. The cooling unit 28 may be configured by a compressor.

[0141] (6) In the above embodiment, the alarm output from the alarm output unit 54 is output by an alarm sound or an alarm display, but the alarm output from the alarm output unit 54 is not limited to this. The alarm output from the alarm output unit 54 may be output by a message via wired or wireless communication, for example.

[0142] (7) In the above embodiment, the detection unit 4 of each uninterruptible power supply 2 detects the operating sound of the power supply unit 20, and the judgment unit 5 performs the deterioration curve creation process and the deterioration estimation process based on this operating sound. However, the detection unit 4 of each uninterruptible power supply 2 may detect the vibration of the power supply unit 20, the current consumption of the cooling unit 28, and the AE (acoustic emission: sound waves and elastic waves emitted before deformation or damage of the material occurs) of the power supply unit 20, and the judgment unit 5 may perform the deterioration curve creation process and the deterioration estimation process based on these.

[0143] (8) In the above embodiment, the deterioration curve F is created as a graph showing past deterioration based on the signal data B transmitted from multiple uninterruptible power supplies 2. However, the deterioration curve F may also include a prediction of future deterioration. In this case, the deterioration curve F is created by modeling using a multidimensional polynomial function or the like based on a data group showing a deterioration level corresponding to the operating time of one uninterruptible power supply 2, and determining a function by minimizing squared errors related to machine learning or the like. The future portion of the deterioration curve F is calculated by performing a prediction calculation by extrapolation based on the function of the created deterioration curve F.

[0144] (9) In the deterioration determination process in the above embodiment, the deterioration state of the cooling unit 28 of multiple uninterruptible power supplies 2 is determined based on the deterioration curve F. However, the deterioration state determination in the deterioration determination process may be performed by comparing the data of the usage environment information B2 and the usage history information B3 transmitted from multiple other uninterruptible power supplies 2 with similar cooling unit deterioration information B1.

[0145] If the usage environment information B2 and usage history information B3 of the uninterruptible power supply 2 that is to be subjected to the determination of the degradation state are within a predetermined certain numerical value of the usage environment information B2 and usage history information B3 transmitted from the other multiple uninterruptible power supply devices 2, a comparison is made with the cooling unit deterioration information B1, and if the cooling unit deterioration information B1 of the uninterruptible power supply 2 that is to be subjected to the determination of the degradation state is not within a predetermined certain numerical value of the cooling unit deterioration information B1 transmitted from the other multiple uninterruptible power supply devices 2, it is determined that there is deterioration, and an alarm is issued.

[0146] (10) In the above embodiment, the usage environment information B2 is information relating to at least one of the temperature, humidity, air pressure, and amount of surge power received from when the uninterruptible power supply 2 started operating to the present, but the usage environment information B2 may be information relating to at least one of the current temperature, humidity, air pressure, and amount of surge power received by the uninterruptible power supply 2. In this case, the usage environment information B2 accumulated and stored in the memory unit 52 is edited by the calculation unit 56 and newly stored in the memory unit 52 as usage environment information B2 for each uninterruptible power supply 2. With this configuration, the amount of data transmitted from the uninterruptible power supply 2 can be reduced.

[0147] (11) In the above embodiment, the deterioration judgment process executed by the judgment unit 5 judges whether the deterioration is mild, severe, or within the allowable deterioration range, but the classification of deterioration judged by the deterioration judgment process is not limited to this. For example, the classification of deterioration judged by the deterioration judgment process may be level 1, level 2, or level 3 depending on the nature of the deterioration, regardless of whether the deterioration is mild or severe. Furthermore, the processing executed according to the classification of deterioration is not limited to this. The processing executed for each classification of deterioration may be any processing executed in the mild deterioration processing and severe deterioration processing described above.

[0148] (12) In the above embodiment, the operation command C and the stop command D transmitted may be in the form of electronic messages, or may be other control signals such as a status signal instructing on / off.

[0149] (13) In the above embodiment, in steps S26 and S32, the uninterruptible power supply 2b connected in parallel to the uninterruptible power supply 2a operates to supply power to the load 8a, but as shown in Fig. 10, power may be supplied to the load 8a by the uninterruptible power supply 2b connected to the auxiliary input terminal 26a of the uninterruptible power supply 2a. In this case, in steps S26 and S32, the control unit 3 of the uninterruptible power supply 2a performs control to close the bypass circuit 24. As a result, the power output from the uninterruptible power supply 2b is supplied to the load 8a via the bypass circuit 24 of the uninterruptible power supply 2a.

[0150] In the above embodiment, in steps S26 and S32, the uninterruptible power supply 2b operates to supply power to the load 8a, but power may be supplied from another power source instead of the uninterruptible power supply 2b. [Explanation of symbols]

[0151] 1. Uninterruptible power supply system 2,2a,2b,2n...Uninterruptible power supply 3. Control section 4. Detection section 5... Judgment section 6...Measurement part 8,8a,8b,8n...Load 9...Electric power system 20...Power supply section 21 AC / DC converter 22. Storage battery 23 DC / AC converter 24 Bypass circuit 25 Input terminal 26 Auxiliary input terminal 27 Output terminal 28...Cooling section 31 Input section 32 Output section 33 Transmitter / receiver 34... Arithmetic section 51 Transmitter / receiver 52...Storage section 53...Display section 54 Alarm output section 55 Transmitter / receiver 56... Arithmetic section 91...Power supply line 92...Commercial power supply

Claims

1. an uninterruptible power supply that extracts a sound generated by a cooling unit from an operating sound of a power supply unit and transmits information related to the sound of the cooling unit; a determination unit that receives information about a sound of a cooling unit of the uninterruptible power supply and outputs a graph showing a prediction of a deterioration state of the cooling unit of the uninterruptible power supply based on the received information about the sound of the cooling unit; The determination unit outputs a graph showing a prediction of a deterioration state of the cooling unit for each temperature at which the uninterruptible power supply is used, based on a function obtained by machine learning on the basis of data showing a deterioration state corresponding to an operating time. Uninterruptible power supply system.

2. The determination unit further outputs an alarm by at least one of display, sound, and transmission when the temperature of the uninterruptible power supply is equal to or higher than a predetermined temperature.

2. The uninterruptible power supply system according to claim 1.

3. The determination unit further outputs an alarm by at least one of display, sound, and transmission when the output power of the uninterruptible power supply is equal to or greater than a predetermined power.

3. An uninterruptible power supply system according to claim 1 or 2.

4. When the determination unit outputs an alarm by at least one of display, sound, and transmission, the determination unit controls the uninterruptible power supply to stop the cooling unit.

4. An uninterruptible power supply system according to claim 1.

5. Information regarding the sound of the cooling unit of the uninterruptible power supply is accumulated and stored in a computer cloud.

5. An uninterruptible power supply system according to claim 1.

6. Receive information about the sound of the cooling unit of the uninterruptible power supply, A deterioration judgment device for an uninterruptible power supply, comprising a judgment unit that outputs a graph showing a predicted deterioration state of the cooling unit of the uninterruptible power supply for each temperature at which the uninterruptible power supply is used, based on information received regarding the sound of the cooling unit.

7. On the computer, extracting a sound generated by a cooling unit of the uninterruptible power supply from an operating sound of the power supply unit, and receiving information about the sound of the cooling unit; outputting a graph showing a prediction of a deterioration state of the cooling unit for each temperature at which the uninterruptible power supply is used, based on the received information about the sound of the cooling unit, from a function obtained by machine learning based on data showing a deterioration state corresponding to an operating time; A deterioration judgment program for an uninterruptible power supply for executing the above.

8. A step of extracting a sound generated by a cooling unit of the uninterruptible power supply device from an operating sound of the power supply unit and receiving information about the sound of the cooling unit; a step of outputting a graph showing a prediction of a deterioration state of the cooling unit for each temperature at which the uninterruptible power supply is used, based on information about the sound of the cooling unit received from a function obtained by machine learning based on data showing a deterioration state corresponding to an operating time; The deterioration determination method for an uninterruptible power supply is as follows.

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