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The paper, prepared by CIGRE WG D1.25, presents the experience in practical application of sensitivity verification of the UHF partial discharge detection system for GIS after its introduction by ELECTRA Report in 1999. A detailed description of the two-step procedure, Step 1 in laboratory and Step 2 on-site, is given and supported by examples. Guidelines will help manufacturers and users in the effective...
When the blade of the windmill crosses with the tower in wind power generation system, the wind pressure that blows against the blade becomes weak and the rotor speed decreases. This is called tower shadow effect. This paper proposes the method used stator-flux-oriented vector control to prevent the effect of the tower shadow for the wind generator system with a wound rotor induction generator. This...
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