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Attributed to the high reliability and high safety, gas insulated switchgear (GIS) is playing an important role in the power transmission system, its reliability is exerting more influence on the entire power grid. Under different operation conditions, the surface charges can accumulate on the surface of insulators of GIS, which is one of the main factors causing surface flashover. Surface charges...
Converter transformer is one of the important apparatus of high voltage direct current (HVDC) transmission system. Because of the complex structures and operating conditions, the winding of valve side of converter transformer will withstand DC voltage, combined AC-DC voltage and even polarity reversal voltage, and the insulating properties of which under polarity reversal voltage has drawn great attention...
The surface flashover voltage of the insulator in vacuum is much lower than that of both insulators and the vacuum gap in the same dimension. The critical factor that effects surface flashover voltage is the accumulation of surface charge which can severely restrict the performance of the vacuum devices. Owing to the excellent electrical properties and mechanical properties, Cross-linked Polystyrene...
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