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Table 9 Primary-Backup relay pair for different fault locations in 18 bus microgrid system

From: Coordination of dual setting overcurrent relays in microgrid with optimally determined relay characteristics for dual operating modes

Fault location Relay pair (RP) Primary relay Backup relay (dual) Fault location Relay pair (RP) Primary relay Backup relay (dual) Fault location Relay pair (RP) Primary relay Backup relay (dual)
L1 RP1 R1 R3 L7 RP26 R13 R9 L15 RP51 R29 R28
  RP2 R1 R5   RP27 R13 R11   RP52 R30 R32
  RP3 R1 R7   RP28 R14 R21   RP53 R30 R33
  RP4 R2 R22 L8 RP29 R15 R10 L16 RP54 R31 R20
L2 RP5 R3 R1   RP30 R16 R12   RP55 R32 R30
  RP6 R3 R5   RP31 R16 R17   RP56 R32 R33
  RP7 R3 R7   RP32 R16 R19 L17 RP57 R33 R30
  RP8 R4 R26 L9 RP33 R17 R12   RP58 R33 R32
L3 RP9 R5 R1   RP34 R17 R16   RP59 R34 R37
  RP10 R5 R3   RP35 R17 R19 L18 RP60 R35 R34
  RP11 R5 R7   RP36 R18 R23   RP61 R35 R37
  RP12 R6 R27 L10 RP37 R19 R12 L19 RP62 R37 R34
L4 RP13 R7 R1   RP38 R19 R16   RP63 R38 R39
  RP14 R7 R3   RP39 R19 R17   RP64 R38 R41
  RP15 R7 R5   RP40 R20 R31 L20 RP65 R39 R38
  RP16 R8 R28 L11 RP41 R21 R14   RP66 R39 R41
  RP17 R8 R29   RP42 R22 R2   RP67 R40 R43
L5 RP18 R9 R11 L12 RP43 R23 R18 L21 RP68 R41 R38
  RP19 R9 R13   RP44 R24 R25   RP69 R41 R39
  RP20 R10 R15 L13 RP45 R25 R24   RP70 R42 R44
L6 RP21 R11 R9   RP46 R26 R4 L22 RP71 R43 R40
  RP22 R11 R13 L14 RP47 R27 R6   RP72 R44 R42
  RP23 R12 R16   RP48 R28 R8     
  RP24 R12 R17   RP49 R28 R29     
  RP25 R12 R19   RP50 R29 R8