????????????????????..:;:; 4.3.3Feature vector selectionandsimulation????????????????????.:;zI 4.4Cooperating protection withdesign ofDC????????????????????37 Chapter 5Cooperating protection。with design ofAC.?.?.?..??..?45 5.1Simulation and analysis ofshort-circuit current?????????????????.45 5.2Analysis oftransformer differential 5.2.1Analysis ofactionand malfuction?..??.?.?.?.??.???.?.??????.?...47 5.2.izing inrush current?.?.????.??.?..???..???.50 5.3Cooperating protection withdesign 5.4Conclusion???????????????..j????????????????..:???.55 Chapter 6Summary and outlook...???.?..????.??.?.?..?..??57 References.?.?....??...??..?.?..?.?........?.??.??......????.??.59 Papers published during theperiod Master Acknowledgments..?..?..?....????..???.???..?..?..???...?.?63 Author and Tutor’S VIII