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In recent years, the service life of Polymeric Insulators is the major part in the electrical field distribution. This paper illustrates electric field and potential distribution in composite insulators under dry conditions using charge simulation method. Electric field is calculated for 500KV both AC and DC line insulators using MATLAB and graphical representations are shown in this paper. In this...
In high voltage side insulators play excellence role in transmitting power. The major drawback in high voltage insulator are the field distribution it is not uniform along surface when this field increase it lead to corona discharge. E-field magnitude increase near high voltage side end fitting. This paper deals with the use of corona ring to improve the electric field distribution on live high voltage...
Recent research have shown that the Wavelet Transform (WT) can potentially be used to extract Partial Discharge (PD) signals from severe noise like White noise, Random noise and Discrete Spectral Interferences (DSI). It is important to define that noise is a significant problem in PD detection. Accordingly, the paper mainly deals with denoising of PD signals, based on improved WT techniques namely...
Partial Discharge (PD) diagnosis is the recognized method to detect defects in the insulation of power system components. However PD measurements are mostly affected by electromagnetic interferences. Wavelet is an effective tool in extracting the PD signal from noise. In this paper a new wavelet threshold determination method called multi-level wavelet decomposition is proposed to denoise the PD signal...
The identification and performance assessment of an insulation system within high voltage equipment is very significant. The central phenomenon to be subjected in insulation diagnostics and performance assessment is partial discharge (PD) measurement. Insulation degradation due to various physical factors such as voids, cracks, ageing and premature failure present within it is always linked to PD...
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