Research on Lightning Protection for the Transmission-line of Shengli Oil Field
Bin Zhu · Insulators and Surge Arresters · 2006
It's not satisfactory for using only distribution type arresters to protect electrical equipments in the Shengli oil field.After analyzing the over voltage of 6 kV and 1 140 V transmission-line,it is considered that inductive over-voltage,back flashover voltage and over-voltage due to straight thunder strike on conductor might be induced.The withstand level for inductive over-voltage is about 86 kA,for back flashover over-voltage is(21～28) kA,and for over-voltage caused be thunder strick onto conductor is 2 kA.The lightning protection leavel of the transmission line was enhanced by installing line type MOAs with and without spark gaps both which was proved during a thunder season.