Medium voltage DC (MVDC) grids for an all-electric society

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1 AC-DC voltage conversion 33 4.2 Modular multilevel converter 34 4.3 Structures 38 4.8 Table contents 3.1.3.2 Insulators 38 4.6.2.7 System operation 42 .2.3 Line configuration 40 4.5 Ageing under stress 38 4.1 Megawatt-scale loads 28 3.3.2 Network configuration and reliability 40 4.4 Switchgear, transformers and earthing 38 4.1 Differences between and fault management 31 4.2 Renewable generation 29 3.6.3 Fault current interruption 32 4.3 The market for MVDC systems 27 3.4.1 Conductors 38 4.6.6 Electromagnetic interference management 42 4.3.1.5 Protection coordination 42 4.1 Voltage 39 4.2 Voltage conversion 33 4.4 infrastructure reuse 38 4.2.4 Interaction with system design 42 4.4.4 Solid state transformers 35 4.3 Battery storage 30 Section 4  MVDC technologies and operational considerations 31 4.1 Fault current management 31 4.6.2 Fault current detection 32 4.6.3 DC-DC voltage conversion 34 4.6 System design 39 4.6.2.5 Harmonic filtering 36 4.2.4.4.1.3 Earthing 37 4

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