The stable state analysis on the single-phase earth fault of small current grounding system based on mathematical model

The analysis on the single-phase earth fault of small current grounding system is the important basis that carrying on the breakdown route selection as well as taking other relay protection measure; Only complete the single-phase earth fault principle analysis can elaborate systematically the breakdown route selection method based on the principle of the exchange help increasing, this article has carried on the breakdown stable state analysis from the metallic single-phase earth fault and the nonmetallic single-phase earth fault.