Research Article
PLL Based Digital Adaptive Filter for Detecting Interharmonics
Table 2
Simulation results for Case
.
| (Hz) | Interharmonics | Actual value | FFT (method-1) | Error (%) | IEC (method-2) | Error (%) | PM (method-3) | Error (%) |
| 49.5 | 1.06 × | 0.1 | 0.0963 | 3.679 | 0.1124 | 12.41 | 0.0974 | 2.550 | 3.40 × | 0.05 | 0.0499 | 0.281 | 0.0477 | 4.572 | 0.0500 | 0.042 | 10.60 × | 0.1 | 0.0995 | 0.542 | 0.0102 | 2.886 | 0.0999 | 0.028 | 11.70 × | 0.05 | 0.0497 | 0.601 | 0.0505 | 1.005 | 0.0499 | 0.037 |
| 50 | 1.06 × | 0.1 | 0.0970 | 3.037 | 0.0961 | 3.810 | 0.0990 | 0.948 | 3.40 × | 0.05 | 0.0500 | 0.000 | 0.0500 | 0.000 | 0.0500 | 0.026 | 10.60 × | 0.1 | 0.1000 | 0.000 | 0.1000 | 0.000 | 0.0999 | 0.018 | 11.70 × | 0.05 | 0.0500 | 0.000 | 0.0500 | 0.000 | 0.0499 | 0.031 |
| 50.5 | 1.06 × | 0.1 | 0.0962 | 3.833 | 0.0837 | 16.23 | 0.0974 | 2.596 | 3.40 × | 0.05 | 0.0499 | 0.172 | 0.0505 | 0.996 | 0.0500 | 0.045 | 10.60 × | 0.1 | 0.0992 | 0.780 | 0.1029 | 2.866 | 0.1000 | 0.027 | 11.70 × | 0.05 | 0.0495 | 0.937 | 0.0481 | 3.757 | 0.0500 | 0.039 |
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