fig18
![Single-phase grounding line selection method for closed-loop distribution network adapted to medium voltage microgrid access](https://image.oaes.cc/7d49a0b5-8049-4c5b-a86a-dafa1383da92/jsegc3013.fig.18.jpg)
Figure 18. The zero-sequence current of each line changes when the grounding fault occurs in L5. (A) Change of zero-sequence current amplitude at each end of the connecting line; (B) The difference of zero-sequence current at each end of the connecting line; (C) Change of zero-sequence current amplitude of each feeder; (D) Zero-sequence current difference of each feeder.