Table 9 Performance of distance relay RA with PAZSD methodology for different faults with FR = 4.9 Ω at different distances
Fault Condition | Impedance seen by the relay RA | Current Coefficients | New Zone Setting of | Performance of RA with proposed methodology | ||||
|---|---|---|---|---|---|---|---|---|
K 1 | K 2 | K 3 | Zone 1 | Zone 2 | Zone of fault detection is? | Is detected zone correct? (Y/N) | ||
LLG Fault at 50 km | 3.937 ∠ 63.990 | 1.7266 | 1.3281 | 1.2969 | 40.221∠60.36° | 75.414∠60.36° | Zone 1 | Y |
LLL Fault at 50 km | 8.436 ∠ 22.50 | 1.3281 | 1.3516 | 1.3906 | 32.394∠60.36° | 60.738∠60.36° | Zone 1 | Y |
LG Fault at 150 km | 20.52 ∠ 45.070 | 2.5078 | 1.9219 | 2.1875 | 58.418∠60.36° | 109.535∠60.36° | Zone 1 | Y |
LL Fault at 150 km | 16.296 ∠ 43.510 | 2.7656 | 2.5313 | 2.0703 | 64.424∠60.36° | 120.795∠60.36° | Zone 1 | Y |
LL Fault at 250 km | 38.814 ∠ 68.430 | 1.7734 | 4.1172 | 4.7578 | 110.832∠60.36° | 207.809∠60.36° | Zone 1 | Y |
LLL Fault at 250 km | 39.5 ∠ 67.690 | 3.3516 | 3.9453 | 4.3516 | 101.369∠60.36° | 190.067∠60.36° | Zone 1 | Y |
LLG Fault at 300 km | 52.864 ∠ − 273.090 | 2.2109 | 4.5156 | 5.1484 | 119.930∠60.36° | 224.870∠60.36° | Zone 1 | Y |
LLL Fault at 300 km | 52.268 ∠ 65.3030 | 3.5313 | 3.9063 | 4.6016 | 107.193∠60.36° | 200.987∠60.36° | Zone 1 | Y |
LG Fault at 350 km | 79.285 ∠ 68.280 | 2.7891 | 4.5469 | 2.8516 | 105.919∠60.36° | 198.598∠60.36° | Zone 2 | Y |
LLG Fault at 350 km | 80.614 ∠ 68.660 | 4.3359 | 4.75 | 5.0547 | 117.748∠60.36° | 220.777∠60.36° | Zone 2 | Y |