Partial discharge signal interpretation for generator diagnostics

Building Partial Discharge Signal Wireless Probes

Self-Starting Control Chart and Post Signal Diagnostics for Monitoring Project Earned Value Management Indices

Earned value management (EVM) is a well-known approach in a project control system which uses some indices to track schedule and cost performance of a project. In this paper, a new statistical framework based on self-starting monitoring and change point estimation is proposed to monitor correlated EVM indices which are usually auto-correlated over time and non-normally distributed. Also, a new ...

Partial Discharge Signal Denoising Using the Empirical Mode Decomposition

This paper presents the findings of an investigation into Partial Discharge signal denoising using techniques based on Empirical Mode Decomposition. The denoising techniques are based on thresholding the Intrinsic Mode Functions which result from the Empirical Mode Decomposition of a signal. The results of the tests carried out show clearly that these techniques can produce excellent results wh...

Dielectric Response and Partial Discharge Diagnostics of Insulation Systems by Utilizing High Voltage Impulses

In this thesis, power system transients are considered as an opportunity for development of online diagnostics of power components and specifically the insulation systems of power transformers and bushings. Failures of power components and outages can lead to a huge economical loss in the electric power grid. Therefore reliable operation of power grid requires on-line monitoring and diagnostics...

Detection of Electrical Tree Propagation in Generator Bar Insulations by Partial Discharge Measurements

In order to detect the degradation of high voltage machine insulation, partial discharge (PD) measurements are often used. While certain defects can be identified by PD measurements a correlation between PD activity and remaining insulation life or immanent insulation failure has so far not been convincingly demonstrated. As former investigations show, the main electrical degradation process of...