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Feasibility of using low density polyethylene (LDPE) and its hybrid with vinyl-tri-ethoxy silane has been evaluated after its thermal and electrical aging according to IEC 1109 5000hour multi-stress aging protocol. The degradation of pure, silane grafted and cross linked samples is studied after three aging cycles and their leakage current and hydrophobicity classification is presented. Material is...
Although the transfer function (TF) method is widely used to detect deformation and displacement of power transformer windings, the sensitivity to minor defects is affected by several factors. This paper presents the influence of temperature on the TF of transformer windings. Nanosecond pulse was used to extending the frequency band of the measurement system. The experiment was carried on a purpose-made...
Increasing wind power generation quantity needs obviously reliable insulation property of power equipment. Since over 70% of the installed turbines utilize wound rotor induction machines (referred to as double-fed induction generators DFIG) , DFIG is deemed to be one of the most critical components of wind power systems and its performance directly influences the stability and reliability of wind...
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