Measuring device

Abstract

To simplify an operation when measurement data of a cubicle is processed in an external computer device.SOLUTION: A measuring device is of a voltage conversion device comprising a transformer, and the measuring device comprises: a characteristic data storage unit that stores characteristic data including at least one information of a class (single phase / three phase), rated capacity, and rated secondary voltage of the transformer, winding average temperature at full load, maximum oil temperature increase at full load, loss ratio, and time constant of oil; a measurement data acquisition unit that acquires measurement data in which the operating state of the transformer is measured; a measurement data storage unit that stores an arithmetic program for generating an arithmetic result related to the measurement data on the basis of the measurement data and characteristic data, and can output the stored information to an external device; and a data writing unit that stores, in the measurement data storage unit, the acquired measurement data and the characteristic data stored in the characteristic data storage unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a measurement device. [Background technology]

[0002] BACKGROUND ART Conventionally, a system for calculating the margin and deterioration degree of a component part of a cubicle such as a transformer is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-122109 Summary of the Invention [Problem to be solved by the invention]

[0004] As described in Patent Document 1, the calculations for calculating the margin and deterioration of a cubicle transformer and the like require a large amount of calculations and require processing by a relatively high-performance computer. Generally, it is difficult for the relatively low-performance computers used in cubicle monitoring devices to perform such calculations. In such cases, measurement data from the cubicle is provided to a high-performance computer outside the cubicle, and calculations are performed by the high-performance computer. On the other hand, when various calculations using cubicle measurement data are performed by an external device, depending on the cubicle specifications, the calculation algorithm or calculation parameters may differ, requiring time and effort to check and set up.

[0005] The present invention has been made in view of the above points, and provides a measuring device that can simplify the operation when processing cubicle measurement data with an external computer device. [Means for solving the problem]

[0006] One aspect of the present invention is a measurement device for a voltage conversion device that includes a transformer, the measurement device comprising: a characteristic data memory unit that stores characteristic data including at least one piece of information among the transformer type (single-phase / three-phase), rated capacity, rated secondary voltage, average winding temperature at full load, maximum oil temperature rise at full load, loss ratio, and oil time constant; a measurement data acquisition unit that acquires measurement data measuring the operating status of the transformer; a measurement data memory unit that stores a calculation program that generates calculation results related to the measurement data based on the measurement data and the characteristic data and is capable of outputting the stored information to an external device; and a data writing unit that stores the acquired measurement data and the characteristic data stored in the characteristic data memory unit in the measurement data memory unit. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a measuring device that can simplify the operation when processing cubicle measurement data with an external computer device. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of a configuration of a cubicle management system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an example of a functional configuration of a control unit according to the present embodiment. [Figure 3] FIG. 10 is a diagram illustrating an example of the configuration of characteristic data according to the present embodiment. [Figure 4] FIG. 4 is a diagram showing an example of the flow of operations of the measurement device of the present embodiment. [Figure 5] 10A and 10B are diagrams illustrating an example of the movement of information when a calculation program is stored in a measurement data storage unit. [Figure 6] 10A and 10B are diagrams illustrating an example of the movement of information when a calculation program is stored in a characteristic data storage unit. [Figure 7] FIG. 10 is a diagram showing a modified example of the configuration of a cubicle management system. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Configuration of cubicle management system] 1 is a diagram showing an example of the configuration of a cubicle management system 10 according to this embodiment. The cubicle management system 10 utilizes a cloud system and includes a measuring device 30 disposed inside a cubicle 20, a data processing device 40 disposed outside the cubicle 20, and a terminal device 60.

[0010] Cubicle 20 is a cubicle-type high-voltage power receiving facility, which is a set of equipment housed in a metal outer box for converting high-voltage commercial power supplied by an electric power company or the like into power having a voltage and frequency that conforms to the specifications of the consumer's load equipment. Cubicle 20 is equipped with a transformer 21, a current sensor 22, a temperature sensor 23, and a measuring device 30. In addition to these elements, cubicle 20 is also equipped with a power capacitor, a high-voltage load switch, etc., but these are not shown in the figure.

[0011] The transformer 21 may be a lighting transformer that converts high-voltage AC power supplied from a primary circuit W1 consisting of a high-voltage bus bar into low-voltage single-phase AC power, or a power transformer that converts high-voltage AC power into low-voltage three-phase AC power, etc. The transformer 21 outputs the converted AC power to the secondary circuit W2. The current sensor 22 is provided on the secondary electric circuit W2. The current sensor 22 detects a secondary current I flowing through the secondary electric circuit W2 and outputs a signal corresponding to the detected secondary current I to the measurement device 30.

[0012] The temperature sensor 23 is provided around the transformer 21. The temperature sensor 23 detects the environmental temperature T around the transformer 21, and outputs a signal according to the detected ambient temperature T to the measurement device 30. The measuring device 30 acquires information on the secondary current I and the ambient temperature T of the transformer 21 based on the output signals of the current sensor 22 and the temperature sensor 23. In this embodiment, the secondary current I and the ambient temperature T of the transformer 21 correspond to the state quantities of the transformer 21. The measuring device 30 includes a measuring unit 31, a control unit 32, and a display unit 34.

[0013] The display unit 34 includes, for example, a liquid crystal display, and displays various information based on the control of the control unit 32.

[0014] The measurement unit 31 receives the output signals of the current sensor 22 and the temperature sensor 23. The measurement unit 31 measures the secondary current I and the ambient temperature T of the transformer 21 based on the output signals of the current sensor 22 and the temperature sensor 23, and outputs information on the measured secondary current I and the ambient temperature T of the transformer 21 to the control unit 32.

[0015] The control unit 32 is mainly configured with a microcomputer having a CPU, ROM, RAM, etc., and provides various functions. For example, the control unit 32 acquires information on the secondary current I and ambient temperature T of the transformer 21 from the measurement unit 31 at a predetermined period.

[0016] The control unit 32 may calculate average values ​​Iave and Tave of the secondary current I and the ambient temperature T, respectively, for each predetermined time α. The predetermined time α is set to, for example, 30 minutes. The control unit 32 calculates the predetermined time average value Iave of the secondary current and the predetermined time average value Tave of the ambient temperature for each predetermined time α. The functions of the control unit 32 will be described in detail with reference to FIG.

[0017] 2 is a diagram showing an example of the functional configuration of the control unit 32 of this embodiment. The control unit 32 includes a calculation unit 321 and a storage unit 322.

[0018] The storage unit 322 includes, for example, a semiconductor memory or a hard disk drive, and stores programs and data used in the operation of the calculation unit 321. The storage unit 322 also stores information obtained as a result of the operation of the calculation unit 321. In the following description, the program used for the operation of the calculation unit 321 is also referred to as the control program P1.

[0019] The storage unit 322 is configured integrally with the control unit 32, and cannot be separated from the control unit 32 and carried around. In other words, the storage unit 322 is a non-portable storage medium.

[0020] The calculation unit 321 includes, for example, a CPU (Central Processing Unit), and provides various functions based on a control program P1 pre-stored in the storage unit 322. The calculation unit 321 includes a measurement data acquisition unit 3211 and a data writing unit 3212 as its functional units.

[0021] The measurement data acquisition unit 3211 acquires measurement data D1. The measurement data D1 is information obtained by measuring the operating conditions of the transformer 21, such as the secondary side current I and the ambient temperature T described above. In other words, the measurement data acquisition unit 3211 acquires the measurement data D1 obtained by measuring the operating conditions of the transformer 21. The measurement data acquisition unit 3211 outputs the acquired measurement data D1 to the data writing unit 3212.

[0022] The data writing unit 3212 stores the acquired measurement data D1 in the measurement data storage unit .

[0023] The data writing unit 3212 may store the measurement data D1 acquired by the measurement data acquiring unit 3211 in the storage unit 322 before writing the measurement data D1 in the measurement data storage unit 35. In this case, the data writing unit 3212 transfers the measurement data D1 stored in the storage unit 322 to the measurement data storage unit 35, thereby storing the measurement data D1 in the measurement data storage unit 35.

[0024] The measurement data storage unit 35 includes, for example, a semiconductor memory or a hard disk drive, and stores the measurement data D1 output by the data writing unit 3212.

[0025] The measurement data storage unit 35 is a portable storage medium that can be removed from the measurement device 30. The measurement device 30 configured in this manner can provide the measurement data D1 to an external device (e.g., data processing device 40) without using wireless communication or wired communication.

[0026] Furthermore, the control unit 32 reads out the characteristic data D2 from the characteristic data storage unit 36 ​​and writes it into the measurement data storage unit 35.

[0027] The characteristic data storage unit 36 ​​includes, for example, a semiconductor memory or a hard disk drive, and stores the characteristic data D2.

[0028] 3 is a diagram showing an example of the configuration of characteristic data D2 in this embodiment. The characteristic data D2 is information indicating the physical characteristics (e.g., electrical characteristics) of the cubicle 20 according to the device configuration and functional configuration of the cubicle 20. The characteristic data D2 includes characteristic information specific to the transformer 21, as well as characteristic information of power capacitors and high-voltage load switches (not shown). The characteristic information of the transformer 21 includes the type (single-phase / three-phase), rated capacity, rated secondary voltage, average winding temperature at full load, maximum oil temperature rise at full load, loss ratio, oil time constant, etc.

[0029] That is, the characteristic data D2 is information that includes at least one of the following information: the type of transformer 21 (single-phase / three-phase), rated capacity, rated secondary voltage, average winding temperature at full load, maximum oil temperature rise at full load, loss ratio, and oil time constant. The characteristic data storage unit 36 ​​stores characteristic data D2 that includes at least one piece of information among the type of transformer 21 (single-phase / three-phase), rated capacity, rated secondary voltage, average winding temperature at full load, maximum oil temperature rise at full load, loss ratio, and oil time constant.

[0030] 3, the characteristic data D2 may be configured so that a combination of characteristics can be identified by a characteristic data ID. For example, in a cubicle 20 with a certain specification, characteristic data D2 with a characteristic data ID (SP01) is used. In addition, in a cubicle 20 with another specification that is different from the cubicle 20, characteristic data D2 with a characteristic data ID (SP02) is used.

[0031] The characteristic data storage unit 36 ​​may be a portable storage medium that can be removed from the measuring device 30. According to the measuring device 30 configured in this manner, the characteristic data D2 can be changed simply by replacing the portable storage medium without using wireless or wired communication.

[0032] As an example, due to a change in the usage situation of the cubicle 20, in order to improve the rating of the transformer 21, the transformer 21 may be replaced with a transformer 21 with a larger rating after the cubicle 20 is installed. In such a case, if the characteristic data storage unit 36 ​​is a portable storage medium, the characteristic data D2 can be updated by replacing it with the characteristic data storage unit 36 ​​in which the characteristic data D2 of the replaced transformer 21 is stored. According to the measuring device 30 configured in this manner, the characteristic data D2 can be updated without using wireless communication or wired communication.

[0033] The data writing unit 3212 acquires the characteristic data D2 stored in the characteristic data storage unit 36, and stores the acquired characteristic data D2 in the measurement data storage unit 35. That is, the data writing unit 3212 stores the characteristic data D2 stored in the characteristic data storage unit in the measurement data storage unit in addition to the above-mentioned measurement data D1.

[0034] FIG. 4 is a diagram showing an example of the flow of operations of the measurement device 30 of this embodiment. (Step S10) The measurement data acquisition unit 3211 acquires the measurement data D1 from the measurement unit 31. (Step S20) The measurement data acquisition unit 3211 acquires the characteristic data D2 from the characteristic data storage unit . (Step S30) The measurement data acquisition unit 3211 outputs the acquired measurement data D1 and characteristic data D2 to the data writing unit 3212. The data writing unit 3212 writes the measurement data D1 and characteristic data D2 into the measurement data storage unit . As a result, the measurement data storage unit 35 stores the measurement data D1 and the characteristic data D2 indicating the characteristics of the cubicle 20 that is the measurement target of the measurement data D1 as a group of information (i.e., as one set). Therefore, in an external device (for example, data processing device 40) that uses the measurement data D1 stored in the measurement data storage unit 35, it becomes possible to process the measurement data D1 by using the characteristic data D2.

[0035] Returning to FIG. 1 , the terminal device 60 is a smartphone or the like that can be carried by a user. The terminal device 60 may also be a personal computer or the like that is installed in any location. The terminal device 60 communicates with the data processing device 40 via a network line or the like. The terminal device 60 has a display 61 with a touch panel that can display information transmitted from the data processing device 40 and operate the data processing device 40. In this case, the terminal device 60 functions as an operation device or a display device that enables data processing by the data processing device 40 to be operated from a remote location or the like.

[0036] [Configuration of data processing device] The data processing device 40 includes a calculation unit 41, a data acquisition unit 42, and a storage unit 43. The data processing device 40 acquires the measurement data D1 and the characteristic data D2 stored in the measurement data storage unit 35, and performs various data processing related to the cubicle 20.

[0037] The data acquisition unit 42 has a connection unit (for example, a connection terminal such as a memory slot or a USB (Universal Serial Bus) terminal, neither of which are shown) for connecting a portable storage medium such as the measurement data storage unit 35. The data acquisition unit 42 acquires measurement data D1 and characteristic data D2 from the measurement data storage unit 35 connected to this connection unit.

[0038] The storage unit 43 is configured by a hard disk drive, a nonvolatile memory, etc. The storage unit 43 stores various data acquired by the data processing device 40.

[0039] [Calculation of transformer margin] The calculation unit 41 is mainly composed of a microcomputer having a CPU, ROM, RAM, and the like.

[0040] As described above, the measurement data storage unit 35 stores measurement data D1 (e.g., information such as the secondary current Iave and ambient temperature Tave of the transformer 21) and characteristic data D2 (e.g., characteristic information of the transformer 21). The calculation unit 41 acquires the measurement data D1 and the characteristic data D2 stored in the measurement data storage unit 35, and stores the acquired measurement data D1 and characteristic data D2 in the storage unit 43. As a result, the storage unit 43 stores time-series data such as secondary currents Iave(1) to Iave(n) of the transformer 21 and ambient temperatures Tave(1) to Tave(n) acquired from the measuring device 30 during the period from the present to the predetermined time β. The predetermined time β is set to, for example, one year. "n" is an integer equal to or greater than 2.

[0041] The calculation unit 41 calculates the load margin of the transformer 21 based on the characteristic data D2 (e.g., characteristic information of the transformer 21) stored in the memory unit 43 and time-series data such as the secondary current Iave(1) to Iave(n) of the transformer 21 and the ambient temperatures Tave(1) to Tave(n) indicated by the measurement data D1.

[0042] Specifically, the calculation unit 41 acquires information on the maximum value Imax1 of the secondary current Iave during the period from the present to a predetermined time β ago, based on the secondary currents Iave(1) to Iave(n) of the transformer 21 indicated by the measurement data D1 stored in the storage unit 43. The calculation unit 41 also acquires information on the type (single-phase or three-phase), the rated capacity Rc, and the rated secondary voltage V of the transformer 21 indicated by the characteristic data D2. The calculation unit 41 then calculates the measured load Km1 of the transformer 21 based on the following equation f1. Note that the unit of the maximum value Imax1 of the secondary current Iave is "A," the unit of the rated capacity Rc of the transformer 21 is "kVA," and the unit of the rated secondary voltage V of the transformer 21 is "V."

[0043] Km1=Imax1 / (Rc / V)…(f1)

[0044] Furthermore, the calculation unit 41 calculates the annual average value TA of the ambient temperature Tave, the annual fluctuation range TB of the daily average temperature of the ambient temperature T, and the daily fluctuation range TC of the ambient temperature T based on the ambient temperatures Tave(1) to Tave(n) of the transformer 21 indicated by the measurement data D1 stored in the memory unit 43, and calculates the equivalent ambient temperature TD based on these values ​​TA, TB, and TC. Note that the equivalent ambient temperature TD can be calculated, for example, using the method described in "Institute of Electrical Engineers Technical Report No. 143: Oil-Immersed Transformer Operation Guidelines," Institute of Electrical Engineers, November 1989.

[0045] Furthermore, the calculation unit 41 calculates the allowable load Ka of the transformer 21 based on the characteristic information of the transformer 21 indicated by the characteristic data D2 stored in the memory unit 43, as well as the measured load Km1 of the transformer 21, the equivalent ambient temperature TD, the annual fluctuation range TB of the daily average temperature of the ambient temperature T, the daily fluctuation range TC of the ambient temperature T, and predetermined constants. The predetermined constants include the overload time and the life loss coefficient. The predetermined constants include the overload time and the life loss index. The method for calculating the allowable load Ka of the transformer 21 can be, for example, the method described in "Institute of Electrical Engineers Technical Report No. 143: Oil-Immersed Transformer Operation Guidelines," Institute of Electrical Engineers, November 1989.

[0046] The calculation unit 41 calculates the current load margin Mc of the transformer 21 based on the following formula f2 from the type of transformer 21 indicated by the characteristic data D2, whether it is single-phase or three-phase, the rated capacity Rc, the allowable load Ka of the transformer 21 described above, and the measured load Km1.

[0047] Mc=(Ka-Km1)×Rc…(f2)

[0048] The calculation unit 41 transmits the calculated margin Mc of the transformer 21 to the terminal device 60 based on a request transmitted from the terminal device 60 by, for example, a user operation on the terminal device 60. The terminal device 60 displays the margin Mc transmitted from the transformer 21 on the display 61. This allows the user to check the margin Mc of the transformer 21 at any time by looking at the display 61 of the terminal device 60.

[0049] [Calculating the degree of deterioration of a transformer] The calculation unit 41 may calculate a deterioration index, which is an index value of the deterioration of the transformer 21, instead of (or in addition to) the margin of the transformer 21.

[0050] Specifically, the calculation unit 41 calculates the measured load Km2 of the transformer 21 using the following formula f3 based on the measurement data D1 for each predetermined time α.

[0051] Km2=Iave / (Rc / V)…(f3)

[0052] That is, the measured load Km2 indicates the measured load of the transformer 21 for each predetermined time α.

[0053] Furthermore, calculation unit 41 calculates an estimate of the current winding temperature of transformer 21 based on the measured load Km2 of transformer 21 calculated from equation f3, the ambient temperature Tave, and the characteristic information of transformer 21 indicated by characteristic data D2. Calculation unit 41 also calculates a loss of life V1 of transformer 21 based on the calculated winding temperature of transformer 21. The estimated winding temperature and loss of life V1 of transformer 21 can be calculated, for example, using the method described in "Institute of Electrical Engineers Technical Report No. 143: Oil-Immersed Transformer Operation Guidelines," published by the Institute of Electrical Engineers of Japan in November 1989.

[0054] The life loss V1 of the transformer 21 is correlated with the winding temperature during use of the transformer 21. For example, the higher the winding temperature, the more rapidly the transformer 21 deteriorates, and the greater the life loss V1. As a result, the life of the transformer 21 becomes shorter. Also, the lower the winding temperature, the slower the deterioration of the transformer 21 becomes, and the smaller the life loss V1 becomes. As a result, the life of the transformer 21 becomes longer. The deterioration index DI is an index of the life loss V1 of the transformer 21.

[0055] The calculation unit 41 calculates the deterioration index DI from the current life loss V1 of the transformer 21 and a standard life loss V0 of the transformer 21 that is set in advance, based on the following formula f4.

[0056] DI=V1 / V0…(f4)

[0057] The deterioration index DI of the transformer 21 is based on "1", and if the value is greater than "1", it indicates that the deterioration is more advanced than the standard, and if the value is less than "1", it indicates that the deterioration is slower than the standard.

[0058] Specifically, when the deterioration index DI is "1," that is, when the lifetime loss V1 of the transformer 21 is equal to the standard lifetime loss V0, this indicates that the deterioration of the transformer 21 is standard. Note that the state in which standard deterioration occurs in the transformer 21 is when the transformer 21 is used with a winding temperature of 95 degrees. In this case, the lifetime of the transformer 21 is, for example, 30 years.

[0059] On the other hand, if the deterioration index DI of transformer 21 is greater than "1," that is, if the life loss V1 of transformer 21 is greater than the standard life loss V0, it indicates that the deterioration of transformer 21 is more advanced than standard. For example, if transformer 21 is used with a winding temperature of 101 degrees, the deterioration index DI of transformer 21 will be "2.0." In this case, the life of transformer 21 will be 15 years.

[0060] Furthermore, if the deterioration index DI of transformer 21 is less than "1," that is, if the life loss V1 of transformer 21 is less than the standard life loss V0, it indicates that the deterioration of transformer 21 is slower than standard. For example, if transformer 21 is used with a winding temperature of 89 degrees, the deterioration index DI of transformer 21 is "0.5." In this case, the life of transformer 21 is 60 years.

[0061] The calculation unit 41 calculates the winding temperature and deterioration index DI of the transformer 21 based on the secondary current Iave and ambient temperature Tave of the transformer 21 indicated by the measurement data D1, using a predetermined time α as the calculation time width. That is, the calculation unit 41 calculates the deterioration index DI for each predetermined time α. The calculation unit 41 stores the deterioration index DI for each predetermined time α in the memory unit 43. As a result, the memory unit 43 stores time-series data of the deterioration indexes DI(1) to DI(n) of the transformer 21 calculated for each predetermined time α over a certain period.

[0062] The calculation unit 41 calculates the current deterioration index DIc of the transformer 21 from the time-series data of the deterioration indexes DI(1) to DI(n) stored in the storage unit 43, based on the following formula f5.

[0063] DIc={DI(1)+DI(2)+···+DI(n)} / n…(f5)

[0064] The calculation unit 41 transmits the calculated deterioration index DIc of the transformer 21 to the terminal device 60 based on a request transmitted from the terminal device 60 by, for example, a user operation on the terminal device 60. The terminal device 60 displays the deterioration index DIc transmitted from the transformer 21 on the display 61. This allows the user to check the deterioration index DIc of the transformer 21 at any time by looking at the display 61 of the terminal device 60.

[0065] [Provision of calculation programs using measuring equipment] Here, the measurement device 30 provides the calculation program P2 to the data processing device 40 via the measurement data storage unit 35. The calculation program P2 is a program executable by the computer of the data processing device 40, and is a program that generates calculation results related to the measurement data D1 based on the measurement data D1 and the characteristic data D2.

[0066] That is, the measurement data storage unit 35 is a storage medium that stores a calculation program P2 that generates calculation results related to the measurement data D1 based on the measurement data D1 and the characteristic data D2, and that can output the stored information to an external device.

[0067] As an example, the calculation program P2 has a calculation algorithm for the margin and deterioration degree of the transformer in the above-mentioned data processing device 40. The data processing device 40 can perform various data processing based on the measurement data D1 and the characteristic data D2 using the calculation program P2 stored in the measurement data storage unit 35.

[0068] Here, the computation program P2 may be a self-executing program. A self-executing program is a program that can be executed without requiring other programs or data in a basic software environment, such as an operating system, that runs the data processing device 40. For example, the computation program P2 can be executed on the operating system of the data processing device 40 without downloading additional programs or data for execution via a network environment.

[0069] In other words, the calculation program P2 is a self-executing program that, when executed in an external device, reads the characteristic data D2 stored in the measurement data memory unit 35 as calculation parameters without relying on other programs in the basic software environment of the external device, and calculates the measurement data D1 stored in the measurement data memory unit 35 using the calculation parameters.

[0070] This calculation program P2 may be (1) pre-stored in the measurement data storage unit 35, (2) pre-stored in the characteristic data storage unit 36, or (3) pre-stored in the storage unit 322 of the control unit 32. The movement of information within the measurement device 30 in each case will be described below.

[0071] (1) When the calculation program P2 is pre-stored in the measurement data storage unit 35: FIG. 5 is a diagram showing an example of the movement of information when the calculation program P2 is stored in the measurement data storage unit 35. 4, the measurement data acquisition unit 3211 acquires the characteristic data D2 from the characteristic data storage unit 36 ​​(FIG. 5[A]). As a result, the characteristic data D2 is stored in the control unit 32 (storage unit 322). Thereafter, in step S30, the data writing unit 3212 stores the measurement data D1 and the characteristic data D2 in the measurement data storage unit 35 (FIG. 5[B]). As a result, the measurement data D1 and the characteristic data D2 are written to the measurement data storage unit 35. Here, the calculation program P2 is pre-stored in the measurement data storage unit 35. Therefore, as shown in [B] in the same figure, the measurement data storage unit 35 stores the calculation program P2, the measurement data D1, and the characteristic data D2 as one set.

[0072] (2) When the calculation program P2 is pre-stored in the characteristic data storage unit 36: FIG. 6 is a diagram showing an example of the movement of information when the calculation program P2 is stored in the characteristic data storage unit . 4, the measurement data acquisition unit 3211 acquires the characteristic data D2 and the calculation program P2 from the characteristic data storage unit 36 ​​(FIG. 6[A]). As a result, the characteristic data D2 and the calculation program P2 are stored in the control unit 32 (storage unit 322). Thereafter, in step S30, the data writing unit 3212 stores the measurement data D1, the characteristic data D2, and the calculation program P2 in the measurement data storage unit 35 (FIG. 6[B]). That is, the measurement data D1, the characteristic data D2, and the calculation program P2 are written to the measurement data storage unit 35. In the case of the measuring device 30 configured in this manner, similar to the above (1), the measurement data storage unit 35 stores a set of the calculation program P2, the measurement data D1, and the characteristic data D2.

[0073] (3) When the calculation program P2 is pre-stored in the storage unit 322: As in step S30 of (2) above, the data writing unit 3212 stores the measurement data D1, the characteristic data D2, and the calculation program P2 in the measurement data storage unit 35. Note that this is the same as the situation in FIG. 6[B] of (2) above, and therefore is not shown in the figure. In the case of the measuring device 30 configured in this manner, similar to (1) and (2) above, the calculation program P2, the measurement data D1, and the characteristic data D2 are stored as a set in the measurement data memory unit 35.

[0074] As described above, according to the cubicle management system 10 of this embodiment, the measurement device 30 stores the measurement data D1, the characteristic data D2, and the calculation program P2 in the measurement data storage unit 35 as a set. According to the cubicle management system 10 configured in this manner, data processing can be performed in an external device (e.g., a data processing device 40) that uses the information stored in the measurement data storage unit 35, without having to separately obtain information indicating the characteristics of the cubicle 20 or an operation program.

[0075] For example, depending on the location where the cubicle 20 is installed, there may not be a network environment in place to connect to a cloud server that stores information indicating the characteristics of the cubicle 20 and a calculation program. Even in such a case, according to the cubicle management system 10 of this embodiment, data processing related to the cubicle 20 can be performed simply by obtaining the measurement data storage unit 35.

[0076] Furthermore, the calculation of the margin and deterioration level of the cubicle 20, as exemplified above, may require a large amount of calculation and place a heavy load on the computer. When performing such calculations, it is preferable that the computer that processes the data has sufficient performance. Generally, in terms of weather resistance, durability, and cost, it is easier to improve the performance of a CPU used in an external device such as the data processing device 40 than a CPU used in the control unit 32 of the cubicle 20. According to the cubicle management system 10 of this embodiment, high-load calculations can be performed not by the measuring device 30 of the cubicle 20 but by an external device such as a data processing device 40 having sufficient performance.

[0077] [Variations] In the above-described cubicle management system 10, information is exchanged between the cubicle 20 and the data processing device 40 via a portable storage medium, but this is not limiting. For example, the cubicle management system 10 may be configured to exchange information between the cubicle 20 and the data processing device 40 via wireless communication or wired communication.

[0078] 7 is a diagram showing a modified example of the configuration of the cubicle management system 10. In the cubicle management system 10 of this modified example, the measuring device 30 is provided with a communication unit 33. The communication unit 33 communicates with the data processing device 40 via a network line or the like.

[0079] That is, the communication unit 33 outputs the information stored in the measurement data storage unit 35 to an external device (e.g., the data processing device 40) by wired communication or wireless communication. According to the measurement device 30 configured in this manner, various types of information can be exchanged between the control unit 32 and the data processing device 40 via the communication unit 33. According to the cubicle management system 10 configured in this manner, the data processing device 40 can acquire information from the measuring device 30 in real time.

[0080] [Variation 2] As described above, the measurement data D1 is stored in the measurement data storage unit 35. This measurement data D1 is information acquired in real time by the operation of the transformer 21 (i.e., information that is frequently updated), and therefore, it is preferable that the measurement data D1 be easily accessible from outside. On the other hand, the characteristic data D2 stored in the characteristic data storage unit 36 ​​is information determined by the specifications of the transformer 21, etc. Therefore, the timing of updating the content of the characteristic data D2 is limited, for example, when performing renewal work such as replacing or expanding the transformer 21. On the other hand, if the characteristic data D2 is updated carelessly, the reliability of the calculation results based on the characteristic data D2 may decrease. For this reason, it is preferable that external access to the characteristic data storage unit 36 ​​be limited to specific authorized personnel, etc.

[0081] Therefore, the security level of the update work of the characteristic data storage unit 36 ​​may be set higher than the security level of the update work of the measurement data storage unit 35. For example, if the characteristic data storage unit 36 ​​is a portable storage medium, the path for removing the characteristic data storage unit 36 ​​from the measuring device 30 may be configured to be lockable by an administrator. Furthermore, when the characteristic data D2 of the characteristic data storage unit 36 ​​can be updated through the communication unit 33 as in the above-described modified example, a security system such as two-step authentication for the administrator may be provided.

[0082] That is, the security level of the updating operation of updating the characteristic data D2 stored in the characteristic data storage unit 36 ​​from outside the measuring device 30 is higher than the security level of the measurement data D1 acquisition operation of extracting the measurement data D1 stored in the measurement data storage unit 35 from outside the measuring device 30. According to the cubicle management system 10 configured in this manner, the procedure for acquiring the measurement data D1 is simplified and the procedure for updating the characteristic data D2 is tightened, thereby improving the reliability of the calculation results by external devices such as the data processing device 40.

[0083] Each unit included in each device in the above-described embodiments may be realized by dedicated hardware, or may be realized by a memory and a microprocessor.

[0084] In addition, each part of each device may be composed of a memory and a CPU (central processing unit), and the functions of each part of each device may be realized by loading a program into memory and executing it.

[0085] In addition, a program for realizing the functions of each unit of each device may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read into a computer system and executed to perform processing by each unit of the control unit. Note that the term "computer system" here includes hardware such as an OS and peripheral devices.

[0086] Furthermore, if a WWW system is used, the "computer system" also includes the homepage provision environment (or display environment). "Computer-readable recording media" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into computer systems. Furthermore, "computer-readable recording media" also includes devices that dynamically store programs for a short period of time, such as communication lines used when transmitting programs over networks like the Internet or over communication lines like telephone lines, and devices that store programs for a fixed period of time, such as volatile memory within computer systems that serve as servers or clients. Furthermore, the programs may be programs that implement some of the aforementioned functions, or may be programs that can realize the aforementioned functions in combination with programs already stored in the computer system.

[0087] One embodiment of the present invention has been described in detail above with reference to the drawings, but the specific configuration is not limited to that described above, and various design changes and the like are possible within the scope that does not deviate from the gist of the present invention. [Explanation of symbols]

[0088] 10...cubicle management system, 20...cubicle, 21...transformer, 22...current sensor, 23...temperature sensor, 30...measuring device, 31...measuring unit, 32...control unit, 321...calculating unit, 3211...measured data acquisition unit, 3212...data writing unit, 322...storage unit, 33...communication unit, 34...display unit, 35...measured data storage unit, 36...characteristic data storage unit, 40...data processing device, 41...calculating unit, 42...data acquisition unit, 43...storage unit, 50...database, 60...terminal device, D1...measured data, D2...characteristic data, P1...control program, P2...calculating program

Claims

1. A measurement device for a voltage conversion device including a transformer, a characteristic data storage unit that stores characteristic data including at least one piece of information among the type of transformer (single-phase / three-phase), rated capacity, rated secondary voltage, average winding temperature at full load, maximum oil temperature rise at full load, loss ratio, and oil time constant; a measurement data acquisition unit that acquires measurement data obtained by measuring the operating status of the transformer; a measurement data storage unit that stores a calculation program for generating calculation results related to the measurement data based on the measurement data and the characteristic data, and that is capable of outputting stored information to an external device; a data writing unit that stores the acquired measurement data and the characteristic data stored in the characteristic data storage unit in the measurement data storage unit; A measuring device comprising:

2. The measurement data storage unit is a portable storage medium that can be removed from the measurement device. The measurement device according to claim 1 .

3. The characteristic data storage unit is a portable storage medium that can be removed from the measuring device. The measurement device according to claim 1 .

4. a communication unit that outputs the information stored in the measurement data storage unit to an external device by wired communication or wireless communication; The measurement device of claim 1 further comprising:

5. The calculation program is a self-executing program that, when executed in an external device, reads the characteristic data stored in the measurement data storage unit as calculation parameters and calculates the measurement data stored in the measurement data storage unit using the calculation parameters without relying on other programs in the basic software environment of the external device. The measurement device according to claim 1 .

6. The security level of an update operation for updating the characteristic data stored in the characteristic data storage unit from outside the measurement device is higher than the security level of a measurement data acquisition operation for extracting the measurement data stored in the measurement data storage unit from outside the measurement device. The measurement device according to claim 1 .

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