CN-122000137-A - Twisting control method, system and equipment for zero-defect superconducting wire

CN122000137ACN 122000137 ACN122000137 ACN 122000137ACN-122000137-A

Abstract

The invention belongs to the field of smart grid industry, and provides a twisting control method, a twisting control system and twisting control equipment for zero-defect superconducting wires, which can be used for solving an integer closest to a twisting distance consistency ratio as a multiple consistency target integer according to an actual twisting distance value and the twisting distance consistency ratio of a cable, and taking an absolute value of a difference between the twisting distance consistency ratio and the multiple consistency target integer as a multiple consistency deviation; when the fold uniformity deviation is greater than a fold uniformity tolerance limit, the twist speed and/or pull line speed are controlled such that the cable lay length approaches a combination of the fold uniformity target integer and the strand twist pitch value. The method and the device realize timely identification, smooth deviation correction and process tracing of the consistent deviation of the lay length multiple while meeting the constraints of the structure and the mechanical process, thereby improving the consistency of products and the process controllability.

Inventors

LI XIAO
TAN JIAMAN
MA YULONG
WEI HAIBIN

Assignees

广东精达漆包线有限公司

Dates

Publication Date: 20260508
Application Date: 20260320

Claims (11)

1. A method of controlling twisting of a zero defect superconducting wire, the method comprising: obtaining the actual value of the traction linear velocity in the twisting process and the actual value of the twisting rotational speed; Determining a cable lay length actual value according to the traction wire speed actual value and the twisting rotational speed actual value; The integer closest to the strand lay consistency ratio is obtained to be used as a multiple consistency target integer, and the absolute value of the difference between the strand lay consistency ratio and the multiple consistency target integer is used as a multiple consistency deviation; When the fold uniformity deviation is greater than a fold uniformity tolerance limit, the twist speed and/or pull line speed are controlled such that the cable lay length approaches a combination of the fold uniformity target integer and the strand twist pitch value.
2. The method of twisting a zero defect superconducting wire according to claim 1, wherein: Determining a target cable lay length from the multiple uniformity target integer and the strand twist pitch value, the target cable lay length being a product of the multiple uniformity target integer and the strand twist pitch value; and approximating the cable lay length to the target cable lay length based on the target cable lay length control.
3. The twisting control method of a zero defect superconducting wire according to claim 1 or 2, wherein obtaining the actual value of the pulling wire speed and the actual value of the twisting speed comprises: And acquiring a plurality of groups of traction linear velocity and twisting rotational speed data in the same sampling window, and respectively calculating a traction linear velocity average value and a twisting rotational speed average value in the sampling window to be used as the traction linear velocity actual value and the twisting rotational speed actual value for calculating the cable twisting distance actual value and the twisting distance consistency ratio.
4. The stranding control method of a zero defect superconducting wire of claim 1 or 2 wherein when the fold consistency deviation is greater than a fold consistency tolerance limit, the controlling the stranding speed and/or the pull line speed comprises at least one of: setting a twisting speed set point to be the actual value of the traction linear velocity divided by the target cable lay length under the condition that the actual value of the traction linear velocity is kept unchanged; And setting the traction wire speed set value as the actual value of the twisting speed multiplied by the target cable twisting distance under the condition that the actual value of the twisting speed is kept unchanged.
5. The stranding control method of a zero defect superconducting wire of claim 4 wherein the multiple uniformity tolerance limit is determined based on specification parameters of the superconducting wire to be stranded, the specification parameters including at least one of a wire harness outer diameter, a number of strands, and a single strand cross-sectional area, and the multiple uniformity tolerance limit is an upper limit value calculated from the specification parameters for triggering execution of the control of the stranding speed and/or the traction wire speed.
6. The method of claim 5, wherein when the fold consistency deviation is greater than a fold consistency tolerance limit, generating a fold consistency deviation event record and recording data associated with the event for trace back.
7. The stranding control method of a zero defect superconducting wire of claim 5 wherein the stranding speed and/or the pull wire speed is controlled to resume to a stranding speed set point and/or a pull wire speed set point prior to the deviation trigger when the fold consistency deviation amount is restored from greater than the fold consistency tolerance limit to not greater than the fold consistency tolerance limit.
8. The method according to claim 5, wherein the adjustment of the twisting speed and/or the pulling wire speed is performed using a limiting and/or speed limiting constraint to limit the amount of change of the set value in the adjacent control period not to exceed the upper limit value.
9. The method according to claim 5, wherein the multiple uniformity tolerance limit is automatically calculated by the controller according to the wire harness outer diameter, the number of strands, and the individual cross-sectional area, and specifically wherein the ratio of the square of the wire harness outer diameter to the product of the square of the number of strands and the individual cross-sectional area is determined as the multiple uniformity tolerance limit.
10. A stranding control system of zero-defect superconducting wires, characterized in that the stranding control system of zero-defect superconducting wires is operated in any computing device of a desktop computer, a notebook computer or a cloud data center, the computing device comprises a processor, a memory and a computer program stored in the memory and operated on the processor, and the steps in the stranding control method of one of the zero-defect superconducting wires are realized when the processor executes the computer program.
11. An electronic device comprising at least one processor and a memory communicatively coupled to the at least one processor, the memory storing instructions executable by the at least one processor, wherein the instructions are executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 9.

Description

Twisting control method, system and equipment for zero-defect superconducting wire Technical Field The invention belongs to the field of intelligent power grid industry and automatic control, and particularly relates to a twisting control method, system and equipment for zero-defect superconducting wires. Background With the increase of large-capacity direct current power utilization scenes such as capacity expansion and upgrading of urban power grids, large-current special lines, power supply of data centers, urban rail transit and the like, the superconducting cable is considered as an important emerging power transmission solution due to the characteristics of large capacity, low loss, self-limiting current, environmental friendliness and the like, and demonstration and industrialization promotion trends are formed in various application scenes. The superconducting cable system at the present stage usually needs low-temperature maintenance conditions, engineering adopts low-temperature environments such as a liquid nitrogen temperature zone and the like to keep a superconducting state, and meanwhile, the superconducting cable system is matched with a refrigeration, heat insulation and monitoring system, and related engineering has higher requirements on manufacturing quality consistency and operation reliability. In combination with industry development, industry chains of covering material production, low-temperature refrigeration, cable integration and cable application are formed, and continuous iteration is performed in equipment and process aspects such as ribbon conductor stranding, low-temperature insulation wrapping, vacuum insulation sleeve and the like. In the manufacturing process of superconducting conductors, cables and the like, the conductors can be generally formed by multi-stage twisting, compacting, wrapping and the like of a plurality of strands of superconducting wires or strips. The process not only needs to meet geometric indexes such as structural appearance, outer diameter and void ratio, but also avoids mechanical damage such as excessive stretching, flattening and bending to the superconducting material, and meanwhile, technological parameters such as twisting pitch, paying-off tension and untwisting modes of different levels often need to be strictly controlled, otherwise, the problems such as broken wire, out-of-tolerance of outer diameter, unstable structure and the like can easily occur. Taking a superconducting cable for a nuclear fusion device as an example, as the outer diameter and the void ratio of each level of cable have larger influence on electromagnetic performance, the control requirements on the outer diameter and the void ratio in the twisting process are very strict, and the problems of broken wires, flattening, difficult outer diameter reaching the required size and the like can occur in the twisting by a conventional method. In the prior art of the smart manufacturing equipment industry, various solutions for superconducting cable conductor manufacturing and twisting have been disclosed. For example, patent document CN101123130a discloses a method for manufacturing a low-temperature superconducting cable conductor for ITER system, which adopts multi-stage stranded cable and combines with stainless steel tape wrapping technology, and the background part points out the problems that when adopting cable stranded cable technology or combined winding method, tension control is difficult, superconducting tape is easy to break, welding is needed after tape breaking, performance and quality are difficult to guarantee, etc. For another example, patent document CN105989933a discloses a twisting method of a superconducting cable for fusion, which aims to avoid damage to superconducting strands and control the outer diameter by means of multistage twisting, compacting, pattern packing and stacking and setting an upper limit on the paying-off tension, and the like, and the background part also emphasizes the strictness of the control on the outer diameter and the porosity and points out that the conventional twisting method may cause defects such as wire breakage, flattening, and non-standard outer diameter. However, from the application target of the zero defect superconducting wire, the prior art scheme is mainly focused on a multi-stage twisting structure and geometric and mechanical process control such as tension/compression/outer diameter, the multiple consistency relation between the twisting pitch of the cable relative to the twisting pitch of the stranded wire and the influence of the multiple consistency relation on the electrical property consistency of the stranded wire lack a quantifiable online control framework facing the production process, and meanwhile, the prior art mostly adopts a fixed pitch multiple ratio or experience setting parameter and lacks a unified mechanism for identifying, triggering and traceable recording of the twisting pitch deviation b