NDLI: Partial discharge and noise separation in combined cable

Content Provider	IET Digital Library
Author	Chen, Xiaoxin Qian, Yong Xu, Yongpeng Sheng, Gehao Jiang, Xiuchen
Abstract	Partial discharge (PD) detection has been proved as an effective tool for monitoring the insulation condition of high-voltage cables. However, the detection can be seriously affected by pulse-shaped interference from overhead lines (OHLs) when carried out at the cable termination of a combined cable–OHL. In this study, a novel scheme is presented for separating the PD pulses and interference in a combined cable–OHL. First, the characteristics of the currents from different pulse sources are investigated mathematically. On the basis of these characteristics, separation of multiple pulse sources can be realised by projecting the three-phase power ratios extracted from detected signals onto a ternary plot and then constructing maps using the power ratios of the defective phase. The performance of the scheme is subsequently evaluated by both numerical simulations and field applications. Furthermore, a comparison with the well-known time–frequency mapping method is provided. The results demonstrate that by using the proposed scheme, different pulse sources can be effectively identified without requiring stable pulse shapes and a better separation could be achieved compared with the conventional waveform-based approaches.
Starting Page	2740
Ending Page	2751
Page Count	12
ISSN	17518687
Volume Number	11
e-ISSN	17518695
Issue Number	Issue 11, Aug (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/11/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.0980
Journal	IET Generation, Transmission & Distribution
Publisher Date	2017-03-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cable Termination Combined Cable-OHLs Condition Monitoring Connector Defective Phase Dielectric Breakdown And Discharges Electric Connectors High-voltage Cables Insulation And Insulating Coatings Insulation Condition Monitoring Insulator Multiple Pulse Source Separation Noise Separation Numerical Analysis Numerical Method Numerical Simulation Overhead Power Line Partial Discharge Detection Partial Discharges PD Detection PD Pulse Separation Power Cable Insulation Power Cables Power Line Supports Power Overhead Line Pulse-shaped Interference Signal Detection Ternary Plot Three-phase Power Ratios Time-frequency Analysis Time-frequency Mapping Method
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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