Experimental Assessment on Air Clearance of Multiple Valve Unit Considering Switching Impulse and DC Superimposed Switching Impulse

• Published in: Energies (Basel) Vol. 13; no. 11; p. 2958
• Main Authors: Koo, Jae-Hong, Seong, Jae-Kyu, Hwang, Ryul, Lee, Bang-Wook
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.06.2020
• Subjects: air clearance; critical flashover voltage; DC pre-stress; dielectric characteristics; Electric converters; Electrical insulation; Electrodes; Experiments; Flashover; High voltage; High voltages; HVDC; Studies; Voltage; Wave fronts

Multiple valve unit (MVU), which converts AC to DC and DC to AC, is one of the key elements of high voltage DC (HVDC) transmission. Therefore, the insulation design of MVU against overvoltage should be considered for the stable and reliable operation of HVDC transmission system. Especially, the air...