According to KCL, the current relationships of the ground-fault
PV array are summarized as below.
• At the positive busbar: I
pv+ = -Iback+I2++…+I
n+
• At the negative busbar: I
pv- = I
1-+I
2-+…+I
n-
• At the ground-fault point F: I
g
=I
back + I
1-, where I
1- = I
sc
• At system grounding point G: I
pv+ + I
g
= -