Research on On-Site Testing of Dielectric Losses in Stator Windings of Water-Cooled Generators
Starting from the diagnosis mechanism of dielectric loss,combined with the insulation structure model of the stator winding of a water-cooled generator,this paper briefly analyzes the drawbacks of the conventional test wiring"reverse connection method"through on-site testing cases of water-cooled generator dielectric loss,proposes an improved testing plan for the special test wiring"shielding method",and verifies the feasibility of this plan in practice.The new plan can ensure the accuracy of test data without the need for new operating procedures or maintenance periods,and can provide reference for insulation aging diagnosis work of similar units.
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