Table 9 Comparison between proposed and existing Protection schemes.
Method | Data length (ms) | Noise (db) | Max. fault resistance | Max. cable length (km) | Converter feature | DC-link voltage | Response time (ms) | Keynote | If does threshold fail? |
|---|---|---|---|---|---|---|---|---|---|
ANN7 | 1a and 6b | 50 | 100 | 200 | 12 Pulse -VSC | ± 100 | < 4.5 | Fault impedance ranges from 0.01 to 100 | It depends on the backup protection |
ANN17 | 10 | NA | 50 | 200 | Haflt bridge -MMC | ± 320 | < 14.3c | Response time is very slow due to the considerable data length | It depends on the backup protection |
ANN9 | 1.5 | 18 | 350 | 240 | Haflt bridge -MMC | ± 500 | < 2.5 | Mal-operate under higher fault resistance > 350 Ω | It depends on the backup protection |
Proposed solution | 1 | 20 | 400 | 200 | Haflt bridge -MMC | ± 320 | < 1.25 | Shortest data length can detect fault accurately as high as 400Ω | It would be detected in the next segment as the accuracy of every threshold is 100% |
