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 derive a current specification value when AC is applied to a superconducting cable without actually conducting an AC application 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 DC current is passed through it (S110); multiplying the critical current value by the number of wires used in the superconducting cable and attenuation factor coefficients assigned according to information on the shape and actual operating temperature of the superconducting cable to acquire a total DC current value (S120); and multiplying the effective value when the total DC current value is set as the peak value when an AC current is passed through it by a predetermined safety factor (S130) as the current specification value for the superconducting cable when an AC current is passed through it. The attenuation factor coefficients include at least a self-magnetic field factor coefficient, which is a attenuation factor due to the self-magnetic field generated when a current is passed through the superconducting cable, and a temperature factor coefficient, which is a attenuation factor due to the actual operating 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 rod 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 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 current characteristics required for wire materials used in superconducting cables. [Background technology]

[0002] When AC current is applied to a superconducting cable Critical current value To derive this, it is possible to use a method in which a sample of a superconducting cable is manufactured and an AC current test is actually performed on the sample (Non-Patent Document 1). However, when AC current tests are conducted on superconducting cables, there is a possibility that the superconducting cables may be damaged. Therefore, even if AC current tests are not conducted, it is possible to measure the Critical current value It was 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 electrical properties of a superconducting cable when an AC current is applied to the cable without actually conducting an AC current application test. Critical current value One of the purposes of the present invention is to provide a means by which it is possible to derive the above. [Means for solving the problem]

[0005] A method for calculating characteristics of a superconducting cable according to the present invention includes the steps of: Executed as a calculation process by an information processing device, A method for calculating characteristics of a superconducting cable, comprising: acquiring a critical current value per wire rod 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 the shape information and the actual use temperature information of the superconducting cable to obtain a total DC current value; and a step of multiplying the effective value when the total DC current value is set as a peak value when an AC current is applied by a predetermined safety factor to obtain a total DC current value when an AC current is applied in the superconducting cable. 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. The method for manufacturing a superconducting cable according to the present invention further comprises 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 value is set as an effective value when AC 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 operating temperature to obtain a simulated value of the critical current value of the superconducting cable when DC is applied; a step of selecting wires and the number of wires to be used in the superconducting cable so that a value obtained by multiplying the critical current value per wire when DC is applied by the number of wires to be used satisfies the simulated value; and a step of manufacturing the superconducting cable using the selected wires and the number of wires to be used, wherein the attenuation factor coefficient includes at least a self-magnetic field factor which is an attenuation factor caused by a self-magnetic field generated when current is applied to the superconducting cable, and a temperature factor coefficient which is an attenuation factor caused by the actual operating temperature of the superconducting cable. The superconducting cable characteristic calculation system according to the present invention includes a coefficient storage unit that stores attenuation factor coefficients assigned in accordance with information on the shape and actual use temperature of the superconducting cable, a first condition input unit that receives input of first condition information by a user, the first condition information including at least the information on the shape and actual use temperature of the superconducting cable, the critical current value in direct current flow per wire rod used in the superconducting cable, and the number of wire rods 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 first condition input unit, and the attenuation factor coefficients assigned in accordance with the information on the shape and actual use temperature of the superconducting cable inputted in the first 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 to the superconducting cable. Critical current value and a first calculation unit that 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 factor caused by a self-magnetic field generated when current is passed through the superconducting cable, and a temperature factor coefficient, which is an attenuation factor caused by the actual operating temperature of the superconducting cable. The system for calculating the characteristics of wire for a superconducting cable according to the present invention is a system for calculating the DC current 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 actual use temperature when AC is applied. 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 value obtained by dividing the peak value by a predetermined safety factor is taken as the effective value when AC is applied, and that calculates a 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 ​​when DC is applied to each wire used in the superconducting cable, wherein the attenuation factor coefficient includes at least a self-magnetic field factor that is an attenuation coefficient caused by a self-magnetic field generated when current is applied to the superconducting cable, and a temperature factor coefficient that 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 assigned in accordance with information on the shape and actual use temperature of the superconducting cable, a first condition input unit that receives input of first condition information by a user, the first condition information including at least the information on the shape and actual use temperature of the superconducting cable, the critical current value in direct current flow per wire rod used in the superconducting cable, and the number of wire rods 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 assigned 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 to 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 when AC is applied. 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 value obtained by dividing the peak value by a predetermined safety factor is set as the effective value when 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 as the total value of the critical current values ​​when DC current is applied to each wire material used in the superconducting cable, wherein the attenuation factor coefficient includes at least a self-magnetic field factor that is an attenuation factor caused by a self-magnetic field generated when current is applied to the superconducting cable, and a temperature factor that is an attenuation factor caused by the actual operating temperature of the superconducting cable. 。 [Effects of the Invention]

[0006] According to the present invention, it is possible to determine the electrical properties of a superconducting cable when AC is applied to the cable without actually conducting an AC application test. Critical current value can be derived. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a flowchart of a method according to the first embodiment. [Figure 2] 10 is a flowchart of a method according to a second embodiment. [Figure 3] FIG. 10 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. [Figure 5] FIG. 10 is a functional block diagram of a system according to a fourth embodiment. [Figure 6] FIG. 10 is an image diagram of an input screen displayed on the system according to the fourth embodiment. [Figure 7] FIG. 10 is a functional block diagram of a system according to a fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [Example]

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

[0010] <2> Tori Procurement process (S110) This step 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 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 critical current (Ic) value of the wire using the Hall element method.

[0011] <3> 1st Calculation process (S120) This step is a step of multiplying the critical current value per wire when DC current is flowing, obtained in step (S110), by the number of wires used, and by an attenuation factor coefficient assigned according to the shape information and actual operating temperature information of the superconducting cable, to obtain a total DC 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 by the user as appropriate, 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 coefficient The self-magnetic field factor is an attenuation factor caused by the self-magnetic field generated when a current is passed through a superconducting cable. This coefficient is assigned a value depending on 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] JPEG2026043953000016.jpg40151

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

[0016] An example of temperature factor coefficient allocation is shown in Table 2 below. [Table 2] JPEG2026043953000017.jpg40151

[0017] <4> Second Calculation process (S130) In this step, 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 value when AC current is applied in the superconducting cable. Critical current value This is the step where:

[0018] (1) Wave height This value corresponds to the maximum value in a fixed period of an AC signal. Generally, the relationship between the effective value and the peak value is shown in Equation 1 below. [Formula 1] JPEG2026043953000018.jpg1995

[0019] (2) A specified 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 shown in Equation 2 below. [Formula 2] JPEG2026043953000019.jpg64136

[0021] <6> summary According to the method of the present invention, it is possible to measure the critical current value of a superconducting cable when a direct current is passed through it, without actually conducting an AC current test on the superconducting cable. Critical current value can be derived. [Example]

[0022] <1> Overall configuration (Figure 2) The method for manufacturing a superconducting cable according to the present invention comprises: Critical current value The subject of the present invention is to determine the number of wire rods required to manufacture a superconducting cable from the target value of (1) 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 is flowing through it by carrying out the reverse procedure of the calculations related to the method for calculating the characteristics of a superconducting cable described in the first embodiment, and then determining the wire material and the number of wire materials to be used so as to satisfy this simulated value, and manufacturing a superconducting cable.

[0023] The method for manufacturing a superconducting cable according to this embodiment mainly comprises at least a peak value calculation step (S210), a critical current value calculation step (S220), a wire material selection step (S230), and a cable manufacturing step (S240). The computational entity 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 carried out when AC current is applied to a superconducting cable. Critical current value The target value is divided by a predetermined 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 is to be determined in advance by the manufacturer or purchaser of the superconducting cable, and basically, the value is to be set in accordance with the requirements of the site where the superconducting cable is used. (2) A specified 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 fixed period of an AC signal. Generally, the relationship between the peak value and the effective value is shown in Equation 3 below. [Formula 3] JPEG2026043953000020.jpg995

[0026] <3> Critical current value calculation step (S220) This step is a step in which the peak value obtained in the above step (S210) is divided by an attenuation factor coefficient assigned according to the configuration of the superconducting cable, and the result is used as a simulated value of the critical current value when direct current is flowing 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 input and set appropriately 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 coefficient The self-magnetic field factor is an attenuation factor caused by the self-magnetic field generated when a current is passed through a superconducting cable. This coefficient is assigned a value depending on 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] JPEG2026043953000021.jpg40151

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

[0031] An example of temperature factor coefficient allocation is shown in Table 4 below. [Table 4] JPEG2026043953000022.jpg40151

[0032] (2) Simulated critical current value of superconducting cable when DC current is flowing This value is the reference value for the total critical current value of each wire material used in a superconducting cable when a direct current is passed 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 in which the wires and the number of wires to be used in the superconducting cable are selected so that the value obtained by multiplying the critical current value per wire when a direct current is passed through it by 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 material to be used when direct current is passed through it may be stored in advance and read out and used as appropriate, or the value obtained by performing measurement each time may be input and used. This step 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 to be used selected in the step (S230) described above. 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 other factors.

[0035] <6> summary According to the method of the present embodiment, it is possible to determine the critical current value of a desired superconducting cable when AC is applied, simply by measuring the critical current value of the wire material used in the superconducting cable when DC is applied, without actually conducting an AC application test on the superconducting cable. Critical current value Therefore, it is possible to manufacture a superconducting cable that can satisfy the above requirements. [Example]

[0036] <1> Overall configuration (Fig. 3) An example of a system for calculating the 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 comprises 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. Each part will be described in detail below.

[0038] <2> Coefficient storage section (Figure 3) The coefficient storage unit 10 is a functional 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 (Figure 3) The first condition input unit 20 is a functional block that accepts input of first condition information by a user, which includes at least information on the shape and actual operating temperature of the superconducting cable, the critical current value per wire used in the superconducting cable when direct current flows, and the number of wires used in the superconducting cable. When obtaining the critical current per 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 using 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 coefficient and temperature factor coefficient 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 coefficient and temperature factor coefficient 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 DC current per wire 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 value when AC current is applied in a superconducting cable. Critical current value The process of calculating as follows.

[0041] <5> Example of usage (Figure 4) An example of how the system according to this 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 is passed through it, 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 execute calculation button, whereby the superconducting cable characteristic calculation system A incorporates the superconducting cable characteristic calculation system A. Critical current value Display. The user can 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 is passed through it can be measured without actually conducting an AC current test on the superconducting cable, and the critical current value of the superconducting cable when an AC current is passed through it can be calculated simply by inputting various condition information including the measured value. Critical current valuecan be derived. [Example]

[0043] <1> Overall configuration (Fig. 5) The system B for calculating the characteristics of superconducting cable wire according to the present invention is a system that automatically executes the calculation processes carried out in the process up to the selection of the superconducting cable wire and the number of sheets to be used in the method for manufacturing a superconducting cable described in Example 2. The system B for calculating the characteristics of a wire rod for a superconducting cable according to the present invention comprises 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. Each part will be described in detail below.

[0044] <2> Coefficient storage section (Figure 5) The coefficient storage unit 10 is a functional 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 (Figure 5) The second condition input unit 40 is a unit for inputting information by the user, such as the shape information of the superconducting cable, the actual operating temperature, and the temperature at which AC current is applied. Critical current value This is a functional block that receives input of second condition information that includes at least the target value of

[0046] <4> Second calculation unit (Fig. 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 is a process to find 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 critical current value The process of dividing the peak value 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 determining the result as the total value of the critical current value when direct current is flowing through each wire material used in the superconducting cable.

[0047] <5> Usage image (Figure 6) An example of how the system according to this 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 at which AC current is applied) 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 when a direct current is passed through the wires, the total critical current value of the wires used in the superconducting cable calculated by the calculation process performed by the second calculation unit 50 is displayed. The user can refer to the total critical current value displayed and consider the critical current value per wire for the selected candidate superconducting cable when a direct current is passed through it, while considering the wire to be used and the number of wires to be used.

[0048] When measuring the critical current per wire when direct current is flowing, 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 using the Hall element method.

[0049] <6> summary According to the method of the present embodiment, it is possible to determine the critical current value of a desired superconducting cable when AC is applied, simply by measuring the critical current value of the wire material used in the superconducting cable when DC is applied, without actually conducting an AC application test on the superconducting cable. Critical current valueTherefore, it is possible to derive the selection of wire rods for a superconducting cable and the number of wire rods to be used in order to manufacture a superconducting cable that can satisfy the above. [Example]

[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 explained in the third and fourth embodiments, and detailed explanations 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. [Example]

[0052] <1> overview The present invention is Critical current value It is also possible to provide a superconducting cable in which the critical current per wire used in the superconducting cable during DC current is set to a value equal to or greater than the effective value obtained by multiplying the critical current per wire used in the superconducting cable by 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, and setting the value as the peak value during AC current, by a predetermined safety factor. The damping factor coefficient and the safety factor are as explained in the second embodiment and so detailed explanation will be omitted.

[0053] <2> summary The superconducting cable according to the present invention can measure the critical current of each wire rod used in the superconducting cable when a direct current is applied, and the critical current of each wire rod when an alternating current is applied can be measured. Critical current value Since the distance is specified, there is no need to actually perform an AC current test, and damage to the superconducting cable that may result from performing an AC current test can be prevented. [Explanation of symbols]

[0054] A: Superconducting cable characteristics 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: 1st Calculation process S130: Second Calculation process S210: Wave height value calculation process S220: Critical current value calculation step S230: Wire selection process S240: Cable manufacturing process

Claims

1. A method for calculating characteristics of a superconducting cable, comprising: obtaining a critical current value per wire used in the superconducting cable when a direct current is passed through the wire; multiplying the critical current value by the number of wires used in the superconducting cable and an attenuation factor coefficient assigned in accordance with information on the shape of the superconducting cable and information on the actual use temperature to obtain a total DC current value; and a step of multiplying an effective value of the total DC current value, which is a peak value when an AC current is applied, by a predetermined safety factor to set the value as the current specification value when an AC current is applied to the superconducting cable, The attenuation factor coefficient is 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; a temperature factor coefficient, which is an attenuation coefficient caused by the actual operating temperature of the superconducting cable; Characterized in that it includes at least A method for calculating the characteristics of superconducting cables.

2. A method for manufacturing a superconducting cable, comprising: a step of calculating a peak value when a target value of a current specification value when AC current is applied to the superconducting cable is divided by a predetermined safety factor and the resulting value is taken as an effective value when AC current is applied; a step of dividing the peak value by an attenuation factor coefficient assigned in accordance with information on the shape of the superconducting cable and information on the actual operating temperature, and setting the resulting value as a simulated value of the critical current value when a direct current flows through the superconducting cable; a step of selecting wires and the number of wires to be used for the superconducting cable so 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 rods and the number of wire rods 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 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; Characterized in that it includes 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 operating temperature; 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 wire rod used in the superconducting cable when a direct current flows therethrough, and the number of wire rods 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 the form information and actual use temperature information of the superconducting cable inputted by the first condition input unit by the critical current value and the number of wire rods inputted by the first condition input unit, and calculates a value by multiplying an effective value when the total DC current value is set as a peak value when an AC current is passed by a predetermined safety factor as a current specification value when an AC current is passed through the superconducting cable; 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 current is passed through the superconducting cable; and a temperature factor coefficient, which is an attenuation coefficient caused by the actual use temperature of the superconducting cable. Superconducting cable characteristic calculation system.

4. A system for calculating characteristics of a wire rod for a superconducting cable, for calculating DC current characteristics required for a wire rod to be 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 operating temperature; 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 a current specification value when AC current is applied; a second calculation unit that calculates a peak value when a critical current specification value of the superconducting cable when AC is applied is divided by a predetermined safety factor and the resulting value is taken as an effective value when AC is applied, and that calculates a value that is obtained by dividing the peak value by the attenuation factor coefficient obtained from the coefficient storage unit and sets the result as a total value of critical current values ​​when DC is applied to each wire material used in the superconducting cable, The attenuation factor coefficient is 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 use temperature of the superconducting cable. A system for calculating the properties of wire materials 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 operating temperature; 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 wire rod used in the superconducting cable when a direct current flows therethrough, and the number of wire rods 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 the shape information and actual use temperature information of the superconducting cable inputted by the condition input unit by the critical current value and the number of wire rods inputted by the condition input unit, and calculates a value by multiplying an effective value when the total DC current value is set as a peak value when an AC current is passed by a predetermined safety factor as a current specification value when an AC current is passed through the superconducting cable; 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 a current specification value when AC current is applied; a second calculation unit that calculates a peak value when a current specification value of the superconducting cable when AC is applied is divided by a predetermined safety factor and the resulting value is taken as an effective value when AC is applied, and that calculates a value that is calculated by dividing the peak value by the attenuation factor coefficient obtained from the coefficient storage unit and sets the result as a total value of critical current values ​​when DC is applied to each wire material used in the superconducting cable, The attenuation factor coefficient is 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 use temperature of the superconducting cable. A design support system for superconducting cables.

6. A superconducting cable having a wire housed therein, The current specification value of the superconducting cable when AC is applied is: the peak value when AC is applied is equal to or greater than a value obtained by multiplying the effective value obtained by multiplying the critical current value per wire used in the superconducting cable when DC is applied, the number of wires used in the superconducting cable, and an attenuation factor coefficient assigned in accordance with information on the shape of the superconducting cable and information on the actual operating temperature, 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 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; Characterized in that it includes at least Superconducting cable.

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