Method for calculating characteristics of superconducting cable, method for manufacturing superconducting cable, system for calculating characteristics of superconducting cable, system for calculating characteristics of wire rod for superconducting cable, design support system for superconducting cable, and superconducting cable

Abstract

To make it possible to derive a current specification value when an AC current is passed through a superconducting cable without actually conducting an AC current test on the superconducting cable. [Solution] A method for calculating characteristics of a superconducting cable includes at least the steps of: acquiring a critical current value per wire used in the superconducting cable when a direct current flows (S110); multiplying the critical current value by the number of wires used in the superconducting cable and an attenuation factor coefficient assigned according to information on the shape and actual use temperature of the superconducting cable to acquire a total direct current value (S120); and multiplying an effective value when the total direct current value is a peak value when an alternating current flows by a predetermined safety factor to set the current specification value when an alternating current flows in the superconducting cable (S130). The attenuation factor coefficient includes at least a self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when a current flows in the superconducting cable, and a temperature factor coefficient, which is an attenuation coefficient caused by the actual use temperature of the superconducting cable.

Description

[Technical field]

[0001] The present invention relates to a method for calculating the characteristics of a superconducting cable, a method for manufacturing a superconducting cable, a system for calculating the characteristics of a superconducting cable, a system for calculating the characteristics of a wire for a superconducting cable, a design support system for a superconducting cable, and a superconducting cable, and more particularly, to a method for calculating the characteristics of a superconducting cable when an AC current is applied to the superconducting cable. Critical Current Value The present invention relates to a method and system that enables calculation of the DC characteristics required for wires used in superconducting cables. [Background technology]

[0002] When AC current is applied to a superconducting cable Critical Current Value In order to derive this, it is possible to use a method in which a sample of a superconducting cable is manufactured and an AC current is actually applied to the sample to obtain the results (Non-Patent Document 1). However, when an AC current test is performed on a superconducting cable, there is a possibility that the superconducting cable may be damaged. Therefore, even if an AC current test is not performed, it is possible to measure the current flow of the superconducting cable when AC current is applied. Critical Current Value It has been desired to provide a means for deriving the above. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Showa Electric Wire Review VOL.62 "Prototype and Performance Verification Results of Three-Phase Coaxial Superconducting Cable" SWCC Co., Ltd., December 2016 https: / / www.swcc.co.jp / jpn / tech / review / 62 / A2_62.pdf Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention is a method for determining the characteristics of a superconducting cable when an AC current is applied to the superconducting cable without actually conducting an AC current application test. Critical Current Value One of the objects of the present invention is to provide a means for deriving the above. [Means for solving the problem]

[0005] A method for calculating characteristics of a superconducting cable according to the present invention comprises the steps of: Executed as a calculation process by an information processing device, A method for calculating characteristics of a superconducting cable, comprising the steps of: acquiring a critical current value per wire used in the superconducting cable when a direct current flows; DC current per wire a step of multiplying the critical current value, the number of wires used in the superconducting cable, and an attenuation factor coefficient assigned according to information on the shape and actual use temperature of the superconducting cable to obtain a total DC current value; and a step of multiplying an effective value of the total DC current value, which is set as a peak value when an AC current is applied, by a predetermined safety factor to obtain a peak value of the AC current applied to the superconducting cable when an AC current is applied. Critical Current Value and wherein the attenuation factor coefficient includes at least a self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when current is passed through the superconducting cable, and a temperature factor coefficient, which is an attenuation coefficient caused by the actual operating temperature of the superconducting cable. In addition, the method for producing a superconducting cable according to the present invention includes the steps of: Critical Current Value a step of dividing the target value by a predetermined safety factor to obtain a peak value when the effective value during AC current is applied; a step of dividing the peak value by an attenuation factor coefficient assigned according to information on the shape of the superconducting cable and information on the actual use temperature to obtain a simulated value of a critical current value of the superconducting cable during DC current application; a step of selecting wires and the number of wires to be used for the wires to be used in the superconducting cable such that a value obtained by multiplying a critical current value per piece of wire during DC current application by the number of wires used satisfies the simulated value; and a step of manufacturing a superconducting cable using the selected wires and the number of wires used, wherein the attenuation factor coefficient includes at least a self-magnetic field factor coefficient which is an attenuation coefficient caused by a self-magnetic field generated when current is applied to the superconducting cable, and a temperature factor coefficient which is an attenuation coefficient caused by the actual use temperature of the superconducting cable. A superconducting cable characteristic calculation system according to the present invention includes a coefficient storage unit that stores attenuation factor coefficients that are assigned in accordance with information on the shape and actual use temperature of a superconducting cable, a first condition input unit that accepts input of first condition information by a user, the first condition information including at least information on the shape and actual use temperature of the superconducting cable, a critical current value during direct current flow per piece of wire used in the superconducting cable, and the number of pieces of wire used in the superconducting cable, and an attenuation factor coefficient acquired from the coefficient storage unit based on the information on the shape and actual use temperature of the superconducting cable inputted in the first condition input unit, and DC current per wire The total DC current value is calculated by multiplying the critical current value by the number of wires, and the effective value when the total DC current value is set as the peak value when AC current is applied is multiplied by a predetermined safety factor to obtain the total DC current value when AC current is applied in the superconducting cable. Critical Current Value and a first calculation unit which calculates the attenuation factor coefficient as follows: wherein the attenuation factor coefficient includes at least a self-magnetic field factor coefficient which is an attenuation coefficient caused by a self-magnetic field generated when a current is passed through the superconducting cable, and a temperature factor coefficient which is an attenuation coefficient caused by the actual operating temperature of the superconducting cable. The system for calculating characteristics of wire for superconducting cable according to the present invention is a system for calculating DC characteristics required for wire used in a superconducting cable, and includes a coefficient storage unit that stores attenuation factor coefficients assigned in accordance with information on the shape of the superconducting cable and information on the actual use temperature, and a coefficient storage unit that stores attenuation factor coefficients assigned in accordance with information on the shape of the superconducting cable, the actual use temperature, and the attenuation factor coefficients when AC is applied, the coefficients being stored in accordance with information on the shape of the superconducting cable, the actual use temperature, and the actual use temperature ... Critical Current Value a second condition input unit that receives input of second condition information including at least a target value of Critical Current Valueand a second calculation unit that calculates a peak value when the effective value during AC current is obtained by dividing the peak value by a predetermined safety factor, and sets the value obtained by dividing the peak value by the attenuation factor coefficient obtained from the coefficient storage unit as the total value of the critical current values ​​of each wire used in the superconducting cable during DC current.The attenuation factor coefficients include at least a self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when current is passed through the superconducting cable, and a temperature factor coefficient, which is an attenuation coefficient caused by the actual operating temperature of the superconducting cable. The design support system for a superconducting cable according to the present invention includes a coefficient storage unit that stores attenuation factor coefficients that are assigned in accordance with information on the shape and actual use temperature of the superconducting cable, a first condition input unit that accepts input of first condition information by a user, the first condition information including at least information on the shape and actual use temperature of the superconducting cable, a critical current value during direct current flow per piece of wire used in the superconducting cable, and the number of pieces of wire used in the superconducting cable, and the attenuation factor coefficients acquired from the coefficient storage unit based on the information on the shape and actual use temperature of the superconducting cable inputted in the condition input unit, and the attenuation factor coefficients acquired in accordance with the information on the shape and actual use temperature of the superconducting cable inputted in the condition input unit. DC current per wire The total DC current value is calculated by multiplying the critical current value by the number of wires, and the effective value when the total DC current value is set as the peak value when AC current is applied is multiplied by a predetermined safety factor to obtain the total DC current value when AC current is applied in the superconducting cable. Critical Current Value and a first calculation unit that calculates the superconducting cable shape information, the actual operating temperature, and the current flow time of the superconducting cable by a user. Critical Current Value a second condition input unit that receives input of second condition information including at least a target value of Critical Current Valueand a second calculation unit that calculates a peak value when a value obtained by dividing the peak value by a predetermined safety factor is set as an effective value during AC current flow, and calculates a value obtained by dividing the peak value by the attenuation factor coefficient obtained from the coefficient storage unit as a total value of critical current values ​​during DC current flow of each wire material used in the superconducting cable, wherein the attenuation factor coefficient includes at least a self-magnetic field factor coefficient that is an attenuation coefficient caused by a self-magnetic field generated when current is passed through the superconducting cable, and a temperature factor coefficient that is an attenuation coefficient caused by an actual operating temperature of the superconducting cable. 。 Effect of the Invention

[0006] According to the present invention, it is possible to estimate the characteristics of a superconducting cable when an AC current is applied to the superconducting cable without actually conducting an AC current application test. Critical Current Value can be derived. [Brief description of the drawings]

[0007] [Figure 1] 3 is a flowchart of a method according to the first embodiment. [Diagram 2] 11 is a flowchart of a method according to a second embodiment. [Diagram 3] FIG. 11 is a functional block diagram of a system according to a third embodiment. [Figure 4] FIG. 11 is an image diagram of an input screen displayed on the system according to the third embodiment. [Diagram 5] FIG. 11 is a functional block diagram of a system according to a fourth embodiment. [Figure 6] FIG. 13 is an image diagram of an input screen displayed on the system according to the fourth embodiment. [Figure 7] FIG. 13 is a functional block diagram of a system according to a fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. EXAMPLES

[0009] <1> Overall configuration (Fig. 1) The method for calculating the characteristics of a superconducting cable according to the present invention is to calculate the critical current value of a wire used in a superconducting cable when a direct current is applied to the superconducting cable. Critical Current Value The subject of this paper is to calculate the following: The method for calculating the characteristics of a superconducting cable according to the present embodiment is mainly , take Obtaining process (S110), 1. Calculation step (S120), Second The method includes at least a calculation step (S130). The subject of calculation in each step may be a user or a program. Each step will be described below.

[0010] <2> Tori Procurement process (S110) This process is a step for obtaining the critical current value per wire used in the superconducting cable when a direct current is passed through it. When obtaining the critical current value per piece of wire when direct current is passed through it, it is preferable to use a non-contact and non-destructive measuring device, such as a superconducting wire property evaluation device (Tapestar) manufactured by THEVA, which can measure the critical current (Ic) value of the wire by the Hall element method.

[0011] <3> 1. Calculation process (S120) This process is a step in which the critical current value per piece of wire when a direct current flows, obtained in process (S110), is multiplied by the number of pieces of wire used, and an attenuation factor coefficient assigned according to the shape information and actual operating temperature information of the superconducting cable, to obtain a total direct current value.

[0012] (1) Attenuation factor coefficient The attenuation factor coefficient used in this process is a coefficient assigned according to the shape information and actual operating temperature information of the superconducting cable, and this coefficient can be input and set appropriately by the user, or can be used by reading out a coefficient that has been saved in advance for each shape of the superconducting cable. In the present invention, the types and number of attenuation factor coefficients are not particularly limited, but in this embodiment, two types of attenuation factor coefficients, a self-magnetic field factor coefficient and a temperature factor coefficient, are prepared. Each coefficient will be described in detail below.

[0013] (1.1) Self-magnetic field factor The self-magnetic field factor coefficient is a damping coefficient caused by the self-magnetic field generated when a current flows through a superconducting cable. This coefficient is assigned a value according to the type of superconducting cable (three-phase coaxial type, laminated conductor type, etc.). For example, in the case of a three-phase coaxial type, the self-magnetic field factor coefficient is higher than in the case of a laminated conductor.

[0014] An example of the self-magnetic field factor coefficient allocation is shown in Table 1 below. [Table 1] JPEG0007672558000002.jpg40151

[0015] (1.2) Temperature factor coefficient The temperature factor coefficient is an attenuation coefficient caused by the actual operating temperature of the superconducting cable. This coefficient is assigned different values ​​depending on the temperature environment at the site where the superconducting cable is used. For example, a lower value is set when the actual on-site operating temperature is on the high side, and a higher value is assigned when the actual on-site operating temperature is on the low side.

[0016] An example of temperature factor coefficient allocation is shown in Table 2 below. [Table 2] JPEG0007672558000003.jpg40151

[0017] <4> Second Calculation process (S130) In this step, the effective value of the total DC current value is multiplied by a predetermined safety factor to obtain the peak value of the AC current in the superconducting cable. Critical Current Value This is the step of:

[0018] (1) Wave height This value corresponds to the maximum value in a certain period of an AC signal. In general, the relationship between the effective value and the peak value is shown in Equation 1 below. [Formula 1] JPEG0007672558000004.jpg1995

[0019] (2) Prescribed safety factor This value is to be determined in advance by the manufacturer of the superconducting cable, etc. Generally, the safety factor is set in the range of 1.2 to 1.5.

[0020] <5> Calculation image The calculation formula summarizing the calculations in each step described above is as shown in Equation 2 below. [Formula 2] JPEG0007672558000005.jpg64136

[0021] <6> summary According to the method of the present invention, it is possible to estimate the critical current value of a superconducting cable when a direct current is applied to the wire material used in the superconducting cable without actually performing an AC current application test on the superconducting cable. Critical Current Value can be derived. EXAMPLES

[0022] <1> Overall configuration (Fig. 2) The method for producing a superconducting cable according to the present invention includes: Critical Current Value The subject of the present invention is to determine the number of wire rods necessary for manufacturing a superconducting cable from the target value of 1.0 and to manufacture a superconducting cable using the determined number of wire rods. The method for manufacturing a superconducting cable according to the present invention mainly involves calculating a simulated critical current value of a superconducting cable when a direct current flows through the cable by performing the reverse procedure of the calculations related to the method for calculating the characteristics of a superconducting cable described in the first embodiment above, and then setting the wire and the number of wires to be used so as to satisfy this simulated value, thereby manufacturing a superconducting cable.

[0023] The method for producing a superconducting cable according to this embodiment mainly comprises at least a crest value calculation step (S210), a critical current value calculation step (S220), a wire material selection step (S230), and a cable production step (S240). The subject of calculation in each step may be a user or a program. Each step will be described below.

[0024] <2> Wave height calculation process (S210) This process is for the superconducting cable when AC current is applied. Critical Current Value The target value is divided by a specified safety factor and the value is calculated as Critical Current Value This is the step to find the peak value when is defined as the effective value. Details of each value are as follows:

[0025] (1) When AC current is applied to a superconducting cable Critical Current Value Target value This value shall be determined in advance by the manufacturer or purchaser of the superconducting cable, and shall basically be set to a value that meets the requirements of the site where the superconducting cable is used. (2) Prescribed safety factor This value is to be determined in advance by the manufacturer of the superconducting cable, etc. Generally, the safety factor is set in the range of 1.2 to 1.5. (3) Wave height This value corresponds to the maximum value in a certain period of an AC signal. In general, the relationship between the peak value and the effective value is shown in Equation 3 below. [Formula 3] JPEG0007672558000006.jpg995

[0026] <3> Critical current value calculation step (S220) This step is a step in which the crest value obtained in the above step (S210) is divided by an attenuation factor coefficient assigned according to the shape of the superconducting cable, and the result is used as a simulated critical current value when direct current flows through the superconducting cable. Details of each value are as follows:

[0027] (1) Attenuation factor coefficient The attenuation factor coefficient used in this process is a coefficient assigned according to the form of the superconducting cable, and this coefficient can be appropriately input and set by the user, or can be used by reading out a coefficient that has been saved in advance for each form of the superconducting cable. In the present invention, the types and number of attenuation factor coefficients are not particularly limited, but in this embodiment, two types of attenuation factor coefficients, a self-magnetic field factor coefficient and a temperature factor coefficient, are prepared. Each coefficient will be described in detail below.

[0028] (1.1) Self-magnetic field factor The self-magnetic field factor coefficient is a damping coefficient caused by the self-magnetic field generated when a current flows through a superconducting cable. This coefficient is assigned a value according to the type of superconducting cable (three-phase coaxial type, laminated conductor type, etc.). For example, in the case of a three-phase coaxial type, the self-magnetic field factor coefficient is higher than in the case of a laminated conductor.

[0029] An example of the self-magnetic field factor coefficient allocation is shown in Table 3 below. [Table 3] JPEG0007672558000007.jpg40151

[0030] (1.2) Temperature factor coefficient The temperature factor coefficient is a damping coefficient caused by the actual operating temperature of the superconducting cable. This coefficient is assigned different values ​​depending on the temperature environment at the site where the superconducting cable is used. For example, a lower value is set when the actual on-site operating temperature is on the high side, and a higher value is assigned when the actual on-site operating temperature is on the low side.

[0031] An example of temperature factor coefficient allocation is shown in Table 4 below. [Table 4] JPEG0007672558000008.jpg40151

[0032] (2) Simulated critical current value of superconducting cable when direct current flows This value is the standard value for the total critical current value of each wire material used in a superconducting cable when a direct current flows through it. The method for using this value will be explained in the wire material selection process described later.

[0033] <4> Wire selection process (S230) This process is a step of selecting the wires and the number of wires to be used in the superconducting cable so that the product of the critical current value per wire when a direct current is passed through it and the number of wires to be used satisfies the simulated critical current value of the superconducting cable when a direct current is passed through it. In the calculation of this process, the critical current value of the wire that is a candidate for use when a direct current is passed through it may be stored in advance and read and used as appropriate, or the value obtained by performing measurement each time may be input and used. This process determines the wire material to be used and the number of sheets to be used.

[0034] <5> Cable manufacturing process (S240) This step is a step of manufacturing a superconducting cable using the wire material and the number of sheets selected in the above step (S230). In this process, the superconducting cable is manufactured in accordance with the type of superconducting cable (three-phase coaxial type, laminated conductor type, etc.) selected based on the self-magnetic field factor coefficient and the like.

[0035] <6> summary According to the method of the present embodiment, it is possible to obtain a desired superconducting cable's critical current value when a direct current is applied to the wire material used in the superconducting cable without actually performing an AC current application test on the superconducting cable. Critical Current Value It is possible to manufacture a superconducting cable that can satisfy the above requirements. EXAMPLES

[0036] <1> Overall configuration (Fig. 3) An example of a system for calculating characteristics of a superconducting cable according to the present invention will be described below. A superconducting cable characteristic calculation system A shown in FIG. 3 shows a case where the calculation process carried out in the superconducting cable characteristic calculation method described in the first embodiment is systemized to automatically execute the calculation process.

[0037] A superconducting cable characteristic calculation system A according to the present invention is configured to include at least a coefficient storage unit 10, a first condition input unit 20, and a first calculation unit 30. Each part can be realized by software that can be executed on an information processing device such as a server, PC, tablet, or smartphone. The details of each part will be explained below.

[0038] <2> Coefficient storage section (Figure 3) The coefficient storage unit 10 is a function block that stores attenuation factor coefficients that are assigned in accordance with information on the shape of the superconducting cable and information on the actual temperature at which the cable is used. The attenuation factor coefficient is as explained in the first embodiment, and a detailed explanation will be omitted.

[0039] <3> First condition input section (Fig. 3) The first condition input unit 20 is a functional block that accepts input of first condition information by a user, the first condition information including at least information on the shape and actual operating temperature of the superconducting cable, the critical current value per piece of wire used in the superconducting cable during direct current, and the number of pieces of wire used in the superconducting cable. In addition, when obtaining the critical current when direct current flows through each piece of wire, it is preferable to use a non-contact or non-destructive measuring device, such as a superconducting wire property evaluation device (Tapestar) manufactured by THEVA, which can measure the direct current (Ic) value of the wire by the Hall element method.

[0040] <4> First calculation unit (Fig. 3) The first calculation unit 30 is a functional block for executing at least the following calculation processes. (1) Calculation of total DC current value The attenuation factor coefficients (self-magnetic field factor coefficients and temperature factor coefficients in FIG. 3) acquired from the factor storage unit 10 based on the shape information and actual use temperature information of the superconducting cable inputted in the first condition input unit 20 and the attenuation factor coefficients (self-magnetic field factor coefficients and temperature factor coefficients in FIG. 3) inputted in the first condition input unit 20 DC current per wire A process in which the total DC current value is calculated by multiplying the critical current value by the number of wires. (2) When AC is applied Critical Current Value Calculation process The value obtained by multiplying the effective value of the total DC current value, which is the peak value when AC current is applied, by a specified safety factor is the maximum value when AC current is applied in a superconducting cable. Critical Current Value A process to calculate as follows.

[0041] <5> Example of usage (Figure 4) An example of an image of how the system according to the present embodiment is used will be described with reference to FIG. A user, who is a manufacturer of a superconducting cable, accesses an information processing device incorporating the superconducting cable characteristic calculation system A, and inputs the above-mentioned first conditions (information on the shape of the superconducting cable, information on the actual operating temperature of the superconducting cable, the critical current value per wire rod used in the superconducting cable when a direct current flows, and the number of wire rods used in the superconducting cable) on an input screen (first condition input screen A1) displayed on the user's terminal by the first condition input unit 20, and clicks an execution button to display the characteristic calculation system A1. Critical Current Value Display. The user can obtain the obtained AC current Critical Current Value It is possible to judge whether the value satisfies a predetermined value, or to provide the value as a specification value of the superconducting cable to be presented to a buyer of the superconducting cable.

[0042] <6> summary According to the system of the present invention, the critical current value of the wire material used in the superconducting cable when a direct current flows is measured without actually conducting an AC current test on the superconducting cable, and the critical current value of the wire material used in the superconducting cable when a direct current flows is measured. The critical current value of the wire material used in the superconducting cable when a direct current flows is measured. Critical Current Valuecan be derived. EXAMPLES

[0043] <1> Overall configuration (Fig. 5) The system B for calculating the characteristics of a wire for a superconducting cable according to the present invention shows a case where the calculation processing carried out in the process up to the selection of the superconducting cable wire and the number of sheets to be used in the manufacturing method for a superconducting cable described in Example 2 is systemized to automatically execute the calculation processing. The system B for calculating characteristics of a wire for a superconducting cable according to the present invention is configured to include at least a coefficient storage unit 10, a second condition input unit 40, and a second calculation unit 50. Each part can be realized by software that can be executed on an information processing device such as a server, PC, tablet, or smartphone. The details of each part will be explained below.

[0044] <2> Coefficient storage section (Fig. 5) The coefficient storage unit 10 is a function block that stores attenuation factor coefficients that are assigned in accordance with information on the shape of the superconducting cable and information on the actual temperature at which the cable is used. The attenuation factor coefficient is as explained in the second embodiment, and a detailed explanation will be omitted.

[0045] <3> Second condition input section (Fig. 5) The second condition input unit 40 is a unit for inputting information by a user, such as the shape information of the superconducting cable, the actual operating temperature, and the operating temperature during AC current application. Critical Current Value This is a functional block that receives an input of second condition information that includes at least the target value.

[0046] <4> Second calculation unit (Figure 5) The second calculation unit 50 is a functional block for executing at least the following calculation processes. (1) Calculation of wave height The condition inputted in the second condition input section 20 when AC current is applied to the superconducting cable Critical Current Value This process determines the peak value when the value obtained by dividing the above by a specified safety factor is used as the effective value when AC is applied. (2) Calculation of the critical current value A process in which the crest value is divided by the attenuation factor coefficient (self-magnetic field factor coefficient and temperature factor coefficient in Figure 5) obtained from the coefficient storage unit 10 based on the shape information and actual operating temperature information of the superconducting cable inputted in the second condition input unit 20, and the result is regarded as the total value of the critical current value when direct current is passed through each wire used in the superconducting cable.

[0047] <5> Usage image (Fig. 6) An example of an image of how the system according to the present embodiment is used will be described with reference to FIG. The user accesses an information processing device incorporating the system B for calculating the characteristics of a wire rod for a superconducting cable, and inputs the second conditions (information on the shape of the superconducting cable, the actual operating temperature, and the temperature distribution at the time of AC current application) on an input screen (second condition input screen B1) displayed on the user's terminal by the second condition input unit 40. Critical Current Value By inputting the critical current values ​​of the wires used in the superconducting cable during direct current flow, which are calculated by the calculation process performed by the second calculation unit 50, and clicking the execute calculation button, the total critical current value of each wire used in the superconducting cable during direct current flow is displayed. The user can refer to the total critical current value displayed and consider the critical current value per piece of wire for the superconducting cable candidate when a direct current flows therethrough, while considering the wire to be used and the number of pieces of wire to be used.

[0048] In addition, when measuring the critical current per piece of wire when direct current is passed through it, it is preferable to use a non-contact or non-destructive measuring device, such as a superconducting wire property evaluation device (Tapestar) manufactured by THEVA, which can measure the direct current (Ic) value of the wire by the Hall element method.

[0049] <6> summary According to the method of the present embodiment, it is possible to obtain a desired superconducting cable's critical current value when a direct current is applied to the wire material used in the superconducting cable without actually performing an AC current application test on the superconducting cable. Critical Current ValueIt is possible to derive the selection of wires for a superconducting cable and the number of wires to be used in order to manufacture a superconducting cable that can satisfy the above requirements. EXAMPLES

[0050] <1> Overall configuration (Fig. 7) As shown in FIG. 7, the present invention can also be provided as a superconducting cable design support system C, which is configured by integrating the superconducting cable characteristic calculation system A described in Example 3 and the superconducting cable wire characteristic calculation system B described in Example 4 while sharing the coefficient storage unit 10. The details of each part are the same as those described in the third and fourth embodiments, and detailed description thereof will be omitted.

[0051] <2> summary According to the system of the present invention, it is possible to carry out design studies of superconducting cables and wire rods for superconducting cables while appropriately correcting the conditions input in the first condition section and the second condition section. EXAMPLES

[0052] <1> overview The present invention is Critical Current Value It is also possible to provide a superconducting cable in which the critical current value per wire used in the superconducting cable during DC current flow, the number of wires used in the superconducting cable, and an attenuation factor coefficient assigned according to the shape information and actual operating temperature information of the superconducting cable are multiplied to an effective value, which is set as the peak value during AC current flow, by a predetermined safety factor. The damping factor coefficient and the safety factor are as explained in the second embodiment and the like, and detailed explanation thereof will be omitted.

[0053] <2> summary The superconducting cable according to the present invention can measure the critical current of each wire when a direct current is applied thereto, and can measure the critical current of each wire when an alternating current is applied thereto. Critical Current Value Since the distance between the superconducting cable and the ground is specified, it is not necessary to actually perform an AC current test, and damage to the superconducting cable that would otherwise result from performing an AC current test can be prevented. [Explanation of symbols]

[0054] A: Superconducting cable characteristic calculation system A1: First condition input screen B: Superconducting cable wire properties calculation system B1: Second condition input screen C: Superconducting cable design support system 10: Coefficient storage section 20: First condition input section 30: First calculation unit 40: Second condition input section 50: Second calculation unit S110: Tori profit process S120: 1. Calculation process S130: Second Calculation process S210: Wave height value calculation process S220: Critical current value calculation process S230: Wire selection process S240: Cable manufacturing process

Claims

1. A method for calculating characteristics of a superconducting cable, the method being executed as arithmetic processing by an information processing device, comprising the steps of: A step of acquiring a critical current value per wire used in the superconducting cable when a direct current flows therethrough; multiplying a critical current value per one piece of the wire when a direct current flows, the number of the wires used in the superconducting cable, and an attenuation factor coefficient assigned according to information on the shape of the superconducting cable and information on the actual temperature of use of the superconducting cable to obtain a total direct current value; and determining a critical current value of the superconducting cable when AC is applied by multiplying an effective value of the total DC current value by a predetermined safety factor, The attenuation factor coefficient is A self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when a current is passed through the superconducting cable; a temperature factor coefficient, which is an attenuation coefficient caused by the actual operating temperature of the superconducting cable; and Characterized in that it contains at least A method for calculating the characteristics of a superconducting cable.

2. A method for manufacturing a superconducting cable, comprising the steps of: a step of determining a peak value when a target value of a critical current value of the superconducting cable when an alternating current is applied is divided by a predetermined safety factor and the resulting value is set as an effective value when an alternating current is applied; a step of dividing the peak value by an attenuation factor coefficient assigned according to information on the shape of the superconducting cable and information on the actual temperature of use, and setting the resulting value as a simulation value of a critical current value when a direct current flows through the superconducting cable; selecting wires and the number of wires to be used for the superconducting cable such that a value obtained by multiplying a critical current value per wire when a direct current flows by the number of wires to be used satisfies the simulated value; manufacturing a superconducting cable using the selected wire and the number of wires to be used; and The attenuation factor coefficient is A self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when a current is passed through the superconducting cable; and a temperature factor coefficient, which is an attenuation coefficient caused by the actual operating temperature of the superconducting cable; and Characterized in that it contains at least Manufacturing method of superconducting cable.

3. A system for calculating characteristics of a superconducting cable, comprising: a coefficient storage unit that stores attenuation factor coefficients that are assigned in accordance with information on the shape of the superconducting cable and information on the actual temperature at which the cable is used; a first condition input unit that receives input of first condition information by a user, the first condition information including at least information on the shape and actual use temperature of the superconducting cable, a critical current value per piece of wire used in the superconducting cable during direct current flow, and the number of the wires used in the superconducting cable; a first calculation unit that calculates a total DC current value by multiplying an attenuation factor coefficient obtained from the coefficient storage unit based on information on the shape and actual use temperature of the superconducting cable inputted by the first condition input unit by a critical current value per one piece of the wire when a DC current flows and the number of the wires inputted by the first condition input unit, and calculates a critical current value in the superconducting cable when an AC current flows by multiplying an effective value of the total DC current value by a predetermined safety factor; At least The attenuation factor coefficient is A self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when a current is passed through the superconducting cable; and and a temperature factor coefficient, which is a damping coefficient caused by the actual use temperature of the superconducting cable. A system for calculating the characteristics of superconducting cables.

4. A system for calculating characteristics of a wire for a superconducting cable, for calculating DC characteristics required for a wire used in a superconducting cable, comprising: a coefficient storage unit that stores attenuation factor coefficients that are assigned in accordance with information on the shape of the superconducting cable and information on the actual temperature at which the cable is used; a second condition input unit that receives input of second condition information by a user, the second condition information including at least information on the shape of the superconducting cable, an actual use temperature, and a target value of the critical current value when an alternating current is applied; a second calculation unit that calculates a peak value when a critical current value of the superconducting cable when an AC current is applied is divided by a predetermined safety factor to obtain an effective value when an AC current is applied, and calculates a value obtained by dividing the peak value by the attenuation factor coefficient obtained from the coefficient storage unit to obtain a total value of critical current values ​​of each wire material used in the superconducting cable when a DC current is applied, The attenuation factor coefficient is A self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when a current is passed through the superconducting cable; and and a temperature factor coefficient, which is a damping coefficient caused by the actual use temperature of the superconducting cable. A system for calculating the properties of wire for superconducting cables.

5. A design support system for a superconducting cable, comprising: a coefficient storage unit that stores attenuation factor coefficients that are assigned in accordance with information on the shape of the superconducting cable and information on the actual temperature at which the cable is used; a first condition input unit that receives input of first condition information by a user, the first condition information including at least information on the shape and actual use temperature of the superconducting cable, a critical current value per piece of wire used in the superconducting cable during direct current flow, and the number of the wires used in the superconducting cable; a first calculation unit that calculates a total DC current value by multiplying an attenuation factor coefficient obtained from the coefficient storage unit based on information on the shape and actual use temperature of the superconducting cable inputted by the condition input unit, a critical current value per one piece of the wire when a DC current flows, and the number of the wires inputted by the condition input unit, and calculates a critical current value in the superconducting cable when an AC current flows by multiplying an effective value of the total DC current value as a peak value when an AC current flows, by a predetermined safety factor; a second condition input unit that receives input of second condition information by a user, the second condition information including at least information on the shape of the superconducting cable, an actual use temperature, and a target value of the critical current value when an alternating current is applied; a second calculation unit that calculates a peak value when a critical current value of the superconducting cable when an AC current is applied is divided by a predetermined safety factor to obtain an effective value when an AC current is applied, and calculates a value obtained by dividing the peak value by the attenuation factor coefficient obtained from the coefficient storage unit to obtain a total value of critical current values ​​of each wire material used in the superconducting cable when a DC current is applied, The attenuation factor coefficient is A self-magnetic field factor coefficient, which is an attenuation coefficient caused by a self-magnetic field generated when a current is passed through the superconducting cable; and and a temperature factor coefficient, which is a damping coefficient caused by the actual use temperature of the superconducting cable. A design support system for superconducting cables.

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