Research on On-Line Monitoring Method of Cable Insulation Based on Signal Injection
- Resource Type
- Conference
- Authors
- Niu, Lin; Wu, Guiqing; Xu, Zhangsheng
- Source
- 2021 IEEE 12th Energy Conversion Congress & Exposition - Asia (ECCE-Asia) Energy Conversion Congress & Exposition - Asia (ECCE-Asia), 2021 IEEE 12th. :1844-1849 May, 2021
- Subject
- Power, Energy and Industry Applications
Transportation
Power cables
Power supplies
Power cable insulation
Dielectric losses
Interference
Communication cables
Safety
cable insulation
signal Injection
on-line monitoring
dielectric loss
- Language
- ISSN
- 2150-6086
Underground cables are widely used in urban distribution network. The insulation state of cable is related to the safety and reliability of power supply. In this paper, a cable insulation monitoring method based on signal injection is proposed. The low frequency signal is injected and the dielectric loss parameters of the cable are obtained. The insulation state of the cable is reflected by the dielectric loss parameter of the injected signal. Considering the accuracy of the injected signal in cable insulation monitoring, double terminal sampling is adopted. The variational mode decomposition and signal entropy are used to process the sampled signal and extract the injection signal to reduce the noise interference in the sampling signal. The feasibility and effectiveness of this method is verified by simulation.