From: Pilot protection of hybrid MMC DC grid based on active detection
Distance km / (fault type) | Correlation coefficient (positive/negative) | Fault section | Fault pole | Operate or not (Y/N) |
---|---|---|---|---|
30(single-pole) | −0.873/0.945 | internal | positive | Y |
100(single-pole) | −0.923/0.937 | internal | positive | Y |
150(single-pole) | −0.895/0.916 | internal | positive | Y |
250(single-pole) | −0.832/0.907 | internal | positive | Y |
f2(pole-to-pole) | 0.941/0.932 | external | / | N |
30(pole-to-pole) | −0.824/−0.865 | internal | pole-to-pole | Y |
100(pole-to-pole) | −0.866/− 0.897 | internal | pole-to-pole | Y |
150(pole-to-pole) | −0.813/− 0.821 | internal | pole-to-pole | Y |
250(pole-to-pole) | −0.842/− 0.851 | internal | pole-to-pole | Y |
f3(pole-to-pole) | 0.913/0.922 | external | / | N |