Device and method for testing dielectric loss of power transmission cable

Abstract

The invention relates to a device and method for testing the dielectric loss of a power transmission cable. The device comprises a signal generation module used for outputting an ultralow frequency cosine square wave signal to a power transmission cable to be tested; an acquisition module which is connected with the signal generation module and is used for respectively acquiring a voltage signal and a current signal on an output path of the ultralow-frequency cosine square wave signal; and a processing module which is connected with the acquisition module and is used for acquiring the dielectric loss of the power transmission cable according to the acquired voltage signal and current signal. According to the present invention, the dielectric loss change trend of the power transmission cable can be analyzed by performing dielectric loss detection on the power transmission cable through the ultralow-frequency cosine square wave signal, and the performance and the service life of the cable can be effectively evaluated.

Description

technical field

[0001] The invention relates to the technical field of electric equipment insulation state detection and fault diagnosis, in particular to a testing device and method for dielectric loss of power transmission cables. Background technique

[0002] With the development of urban power grids, power cables have become the mainstream of power transmission due to their good electrical performance and transmission characteristics. However, with the continuous increase of operating time, under the joint action of external factors and internal factors, insulation will appear inside The degradation phenomenon brings great safety hazards to the safe operation of the power grid, so it is particularly important to evaluate the insulation status of cables. Dielectric loss is an important parameter to characterize the overall insulation level of electrical equipment. By detecting the dielectric loss and analyzing its change trend, the performance and life of the cable can be...

Examples

Embodiment Construction

[0043] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0045] It can be understood that the "connection" in the following embodiments should be understood as "e...

technical field

[0001] The invention relates to the technical field of electric equipment insulation state detection and fault diagnosis, in particular to a testing device and method for dielectric loss of power transmission cables. Background technique

[0002] With the development of urban power grids, power cables have become the mainstream of power transmission due to their good electrical performance and transmission characteristics. However, with the continuous increase of operating time, under the joint action of external factors and internal factors, insulation will appear inside The degradation phenomenon brings great safety hazards to the safe operation of the power grid, so it is particularly important to evaluate the insulation status of cables. Dielectric loss is an important parameter to characterize the overall insulation level of electrical equipment. By detecting the dielectric loss and analyzing its change trend, the performance and life of the cable can be...

Examples

Embodiment Construction

[0043] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0045] It can be understood that the "connection" in the following embodiments should be understood as "e...

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