International Transactions on Electrical Energy Systems

Research Article

Open Circuit Fault Diagnosis in Five-Level Cascaded H-Bridge Inverter

Table 1

Occupied states, empty states, and membership functions for OCF in switch.
Condition of switch in leg xOccupied statesEmpty statePossible output voltage levelAntecedent MFsConsequent MFs
SX1SX2SX3SX4SX5SX6SX7SX8TXEsavNSXi
OkOkOkOkOkOkOkOk2p, p, o, n, 2nnull+2EDC, +EDC, 0, −EDC, −2EDCt0 = Se0 = ZR0
fOkOkOkOkOkOkOkp, o, n, 2n2p+EDC, 0, −EDC, −2EDCt1 = Me2 = NSI
OkfOkOkOkOkOkOk2p, p, o, 2nn+2EDC, 0, −EDC, −2EDCt1 = Me3 = PMII
OkOkfOkOkOkOkOk2p, n, 2np, o+2EDC, −EDC, −2EDCt2 = Le6 = NLIII
OkOkOkfOkOkOkOk2p, p, 2nn, o+2EDC, +EDC, −2EDCt2 = Le5 = PLIV
OkOkOkOkfOkOkOk2p, o, n, 2np+2EDC, 0, −EDC, −2EDCt1 = Me4 = NMV
OkOkOkOkOkfOkOk2p, p, o, n2n+2EDC, +EDC, 0, −EDCt1 = Me1 = PSVI
OkOkOkOkOkOkfOk2p, n, 2np, o+2EDC, −EDC, −2EDCt2 = Le6 = NLVII
OkOkOkOkOkOkOkf2p, p, 2nn, o+2EDC, +EDC, −2EDCt2 = Le5 = PLVIII