A method for measuring cable dielectric loss
A dielectric loss and measurement method technology, applied in the field of power transformation, can solve the problems of inability to diagnose cable insulation status, inability to evaluate cable insulation aging level, and low cable detection efficiency
Active Publication Date: 2021-09-14
STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD ELECTRIC POWER RES INST +1
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[0003] The present invention aims to solve the problems in the prior art that it is impossible to diagnose the insulation state of cables, and it is impossible to evaluate the insulation aging level of cables, resulting in low detection efficiency of cables. The present invention provides a method for measuring cable dielectric loss
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[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0037] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0039] see figure 1 Describe this embodiment, the method for measuring the dielectric loss of a cable desc...
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The invention discloses a method for measuring cable dielectric loss, which belongs to the field of power transformation and the field of measurement and testing. The invention solves the problem that in the prior art, it is impossible to diagnose the insulation state of the cable, and it is impossible to evaluate the insulation aging level of the cable, resulting in low detection efficiency of the cable. The invention constructs the relationship between the attenuation coefficient β and the dielectric loss tanδ, and uses the attenuation coefficient β to characterize the dielectric loss tanδ, derives the dielectric loss tanδ from the attenuation characteristics of the damped sinusoidal voltage wave, eliminates the influence of the offset voltage, and avoids the The inaccuracy caused by it affects the dielectric loss tanδ. The invention is mainly used for diagnosing the cable insulation performance.
Description
technical field [0001] The invention belongs to the field of power transformation and the field of measurement and testing. Background technique [0002] Cross-linked polyethylene (XLPE) cables have gradually become mainstream products in power cables due to their good electrical properties and mechanical and physical properties. There are many reasons that will lead to some potential insulation defects of XLPE cables. If these defects cannot be found and eliminated in time, it will pose a serious threat to the safe and stable operation of the power system. Compared with the current relatively mature cable insulation detection methods, it is found that there are problems such as large equipment size and inconvenient portability. At the same time, the single detection technology makes it impossible to make a comprehensive diagnosis of the cable insulation state, which seriously affects the efficiency of detection. Contents of the invention [0003] The invention aims to so...
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IPC IPC(8): G01R27/26
CPCG01R27/2694
Inventor 张德文朱学成张洪达朱广城冯海涛梁建权尚书磊许敏虎张朋张可心陈世玉
Owner STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD ELECTRIC POWER RES INST