It　is　no　longer　difficult　to　get　remote　information　by　relay　protection　in　smart　grid　and　it　is　also　required　that　the　settings　of　relay　protection　should　follow　the　change　of　power　network　and　the　network　should　be　strong,　self-healing　and　high　secure　after　fault　is　cleared.　A　new　scheme　of　coordination　between　main　and　backup　protections　is　presented.　By　applying　the　principle　of　absolute　selectivity　and　multi-level　information　redundancy,　the　backup　protection　makes　use　of　the　state　information　from　adjacent　substations　to　reduce　the　number　of　backup　relays　and　avoid　complicated　setting　coordination.　The　theory　and　algorithm　of　optimal　reclosing　time　based　on　the　minimum　unbalanced　energy　after　the　last　operation　is　presented　to　reduce　the　impulse　of　reclosing　operation　on　system.　The　six-phase　complex　reclose　scheme　with　the　post　-fault　system　robustness　as　its　objective　is　given　for　the　parallel　lines　on　same　tower.