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Table 4 Protection results with different sampling rates

From: Pilot protection of hybrid MMC DC grid based on active detection

Sampling rates (kHz)Correlation coefficient (positive/negative)Fault sectionFault poleOperate or not (Y/N)
2−0.833/0.905internalpositiveY
5−0.825/0.917internalpositiveY
10−0.819/0.913internalpositiveY
15−0.896/0.924internalpositiveY
20−0.931/0.911internalpositiveY
  1. From the simulation results, it can be seen that the correlation coefficient is largely not affected by the sampling rate, ensuring the correct operation of the protection in case of internal faults