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A Poisson-Gaussian (PG) denoising method for inservice insulator image is proposed. The existing spatial-based method can avoid the preserve more detail information than the transform-based method. Various transforms have been used for image denoising. However, the transforms have disadvantages such as aliasing and lack of directional selectivity. Meanwhile, the conventional redundant transform-based...
The physical boundary of a high voltage direct current (HVDC) transmission line consists of smoothing reactor and DC filter. It has the stop-band characteristic to the high-frequency transient voltage components. The high-frequency voltage signal from the external of DC transmission lines will be weakened when it travels through the smoothing reactor and DC filter. Its power will also be much smaller...
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