Diagnosis of commutation failure in HVDC …Translate this page2011-10-18 · In [21], the wavelet multi-resolution signal decomposition of the signals monitored on the ac and dc side can classify the typical disturbance in HVDC systems including commutation failures. The classification rules of commutation failure, dc short circuit and single line to ground fault are easier with the wavelet coefficients at different resolution levels.wenku.baidu.com› › /
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PG&E Phases Out SF6 in HV Substation GIS | T&D World, fixing a single SF 6 leak costs US$25,000 on average. These costs have three components: the cost of replacing gas lost from chronic leaks, the cost of replacing flange O-rings at 10-year intervals and the cost of managing toxic by-products resulting from electrical discharges that occur within SF 6-insulated equipment (Table 1).
