As the traditional routing protocols can not adapt to the intermittent connection of mobile networks due to the sparse distribution,frequent disruption or periodical motion of nodes,a new routing protocol marked as MSAR is proposed based on the awareness of node motion scope with the uncertainty of network status.

Intermittent connectivity destroyed the building blocks of the traditional network—end-to-end principle,and the space network further posed a great challenge because of the characteristics of long,variable latency,low band width,high noise and so on asymmetric links.

By analyzing the accident phenomenon,the conclusion has been made that the accident was caused by single-phase intermittent arc earthing in 10kV system.

Then this model is used to simulate two different intermittent arc grounding faults,the result shows that their over-voltage multiple is compliance with the actual situation,which proves the validity of the arc grounding fault model indirectly.