Chaotic Extension Neural Network-Based Fault Diagnosis Method for Solar Photovoltaic Systems

Table 2

Solar photovoltaic system fault category.

Fault category	Fault condition (short circuit set in faulted solar cell)
Case  1; (C1)	There is no fault in two-series connected photovoltaic cells.
Case  2; (C2)	One solar cell fault occurs in any series branch of two-series branch photovoltaic system.
Case  3; (C3)	Two solar cells have faults in any series branch of two-series branch photovoltaic system.
Case  4; (C4)	Three solar cells have faults in any series branch of two-series branch photovoltaic system.
Case  5; (C5)	One solar cell fault occurs in both of the two-series branches of two-series branch photovoltaic system.
Case  6; (C6)	Two solar cells have faults in both of the two-series branches of two-series branch photovoltaic system.
Case  7; (C7)	In the two-series branch photovoltaic system, one solar cell has fault in one-series branch and two solar cells have faults in the other branch.
Case  8; (C8)	In the two-series branch photovoltaic system, one solar cell has fault in one-series branch and four solar cells have faults in the other branch.
Case  9; (C9)	In the two-series branch photovoltaic system, two solar cells have faults in one-series branch and three solar cells have faults in the other branch.