A comparison of HVAC and HVDC contamination performance of station post insulators

Study on the difference of chemical composition of insulator contamination on UHV‐AC and ‐DC transmission lines

“…On the other hand, the contamination characteristics on the top and bottom surface of insulator are quite different [18][19][20][21]. The ESDD on bottom surface has approximately ten times as much as its on top surface [18].…”

“…The ESDD on bottom surface has approximately ten times as much as its on top surface [18]. Also, the DC insulator is easier to accumulate contamination than AC insulator [19]. The discrepancy of the contamination on the different surface of UHV-AC and UHV-DC insulator has not been studied thoroughly, which needs to be further explored.…”

Effect of Shed Configuration on AC Flashover Performance of Polluted Porcelain Insulators

“…One of the most serious problems with power transmission by overhead lines is contaminated flashover [1]. Especially in recent years, threaten of contamination flashover become more intensity than before, due to the mass construction of UHV and EHV transmission lines and the aggravation of industrial pollution [2].…”