1Anon. Partial Discharge Testing of Gas Insulated Substations [J]. IEEE Trans. On Power Delivery, 1992. 7(2): 499- 506.
2J S Pearson. Partial Discharge Diagnostics for Gas Insulated Substations[ J]. IEEE Trans. On Dielectrics and electrical In- sulation, 1995, 2(5) : 893-905.