Time–Frequency Maps for Multiple Partial Discharge Sources Separation in Cable Terminations
Yufeng Li, Jinchun Han, Yufeng Du, Haiyun Jin
Abstract
This letter proposes improved time-frequency maps for separating multiple partial discharge (PD) sources in cable terminations. PD signals are acquired through a digital measurement system and a high frequency current transformer. The waveform of each pulse is analyzed by synchrosqueezed wavelet transform, and six representative feature parameters are proposed to form time–frequency maps. The results show that the proposed algorithm is effective for discriminating mixed PD sources in cable terminations and pulses from power electronic devices detected simultaneously by the PD measurement system.
Topics & Concepts
Partial dischargeWaveformWavelet transformElectronic engineeringTime–frequency analysisPower cableCurrent transformerWaveletElectrical engineeringComputer scienceTransformerAcousticsVoltageEngineeringMaterials sciencePhysicsArtificial intelligenceComposite materialFilter (signal processing)Layer (electronics)High voltage insulation and dielectric phenomenaPower Transformer Diagnostics and InsulationElectrostatic Discharge in Electronics