Cable joint partial discharge detection device
A partial discharge detection and cable joint technology, applied in the field of power cables, can solve the problems of increasing detection costs and cannot be inferred to power frequency conditions, and achieves the effects of accurate measurement, light weight and small size
Inactive Publication Date: 2020-03-27
STATE GRID LIAONING ELECTRIC POWER RES INST
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Problems solved by technology
At the same time, transporting these devices requires large transport vehicles, which greatly increases the cost of testing
For the ultra-low frequency voltage test, when considering the results of dielectric (insulation) testing under non-power frequency conditions, it is considered that the partial discharge results obtained from low-frequency testing cannot be directly inferred to the results under power frequency conditions.
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[0027] 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 of the embodiments of the present invention, not all of them. 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.
[0028] It should be noted that when an element or component is considered to be “connected” to another element or component, it may be directly connected to the other element or component and there may be an intervening element or component at the same time. When an element or component is referred to as being "disposed on" another element or component, it can be directly disposed on the other element or component or intervening elements or compon...
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The invention discloses a cable joint partial discharge detection device. The partial discharge detection device comprises an ultralow-frequency voltage generation unit, a signal acquisition unit andan analysis control unit, wherein the ultralow-frequency voltage generating unit comprises a power supply, a voltage stabilizing module, a boosting module and a polarity conversion module, the voltagestabilizing module is connected with the power supply, the boosting module and the analysis control unit, the boosting module is connected with the voltage stabilizing module, the polarity conversionmodule and the analysis control unit, and the polarity conversion module is connected with the boosting module and the analysis control unit. The cable joint partial discharge detection device provided by the invention has the characteristics of high efficiency, light weight, small size and accurate measurement. Furthermore, the cable joint partial discharge detection device uses the trained partial discharge model for detection, so that the detection is more accurate, and the partial discharge result obtained by low-frequency detection can be directly inferred to the result under the power frequency condition.
Description
technical field [0001] The invention relates to the technical field of power cables, in particular to a partial discharge detection device for cable joints. Background technique [0002] In recent years, the proportion of power cables used in the power grid has gradually increased, but cable safety accidents caused by cable insulation defects have occurred from time to time, resulting in huge economic losses. Therefore, ensuring the safe operation of cables has become a key concern of the power supply department. It has been confirmed by research that the partial discharge characteristics of the cable can reflect its insulation state, so partial discharge detection has become the main means of detecting the insulation state of power cables. Partial discharge detection under oscillatory wave voltage is widely used at home and abroad because it has good equivalence with power frequency voltage detection and will not cause damage to the cable under test. This detection can not ...
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Login to View More IPC IPC(8): G01R31/12G01R31/14
CPCG01R31/1272G01R31/14
Inventor 赵振威鲁旭臣朱义东韦德福李冠华师政黄珂郑维刚王雅楠陈浩
Owner STATE GRID LIAONING ELECTRIC POWER RES INST