A method for detecting and locating local heating points of superconducting cables
A technology of superconducting cables and positioning methods, applied in the field of power systems, can solve problems such as damage and cable quenching, and achieve the effects of ensuring safe operation, strong anti-interference ability, and high detection accuracy
Active Publication Date: 2020-10-16
SHENZHEN POWER SUPPLY BUREAU
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In summary, although a variety of superconducting cable quench fault detection methods have been proposed at present, the detection of local heating points is rarely mentioned, and the high temperature of local heating points is often the main cause of cable quenching and damage.
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[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0023] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from this description. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below. limits.
[0024] The method for detec...
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Abstract
The invention relates to a distributed optical fiber temperature measurement technology-based superconducting cable local heat-emitting spot detection and positioning method. According to the method,temperature along a superconducting cable is measured through the distributed optical fiber temperature measurement technology; and the waveform characteristics of the temperature are analyzed, so that the local heat-emitting spot of the superconducting cable is detected and positioned. The distributed optical fiber temperature measurement technology-based superconducting cable local heat-emittingspot detection and positioning method of the invention is suitable for superconducting cables of different structures such as a three-phase split structure, a three-core integrated structure and a three-phase coaxial structure; the method is relatively high in anti-interference capability and high in detection precision. With the method adopted, the problem that the local heat-emitting spots of superconducting cables are difficult to detect and position can be solved. The method plays an important role in guaranteeing the operation safety of the superconducting cables.
Description
technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a method for detecting and locating local heating points of superconducting cables based on distributed optical fiber temperature measurement technology. Background technique [0002] Compared with conventional cables, superconducting cables have many advantages such as low line loss, large transmission capacity, small corridor footprint, and environmental friendliness, providing an efficient, compact, reliable, and green power transmission method for the grid. However, if the superconducting tape is uneven or damaged, the temperature in this area will rise during operation, and in severe cases, it may cause local quenching and damage the cable. Aiming at the protection of superconducting cables, relevant research work has been carried out, mainly including: a method for predicting quench precursors based on dv / dt and dr / dt (Yu Xiaoyan, Li Jingdong, Tang Yuejin....
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IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 吴小辰胡子珩章彬汪桢子汪伟王哲
Owner SHENZHEN POWER SUPPLY BUREAU