Table 7 Performance of the distance relay RA with PAZSD methodology for different faults with FR = 0.2 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) | ||
LG Fault at 50 km | 4.011∠63.5990 | 1.2656 | 1.6712 | 1.5703 | 38.930∠60.36° | 72.994∠60.36° | Zone 1 | Y |
LL Fault at 50 km | 3.933 ∠ 60.950 | 1.5703 | 1.3281 | 1.2734 | 36.580∠60.36° | 68.587∠60.36° | Zone 1 | Y |
LLG Fault at 150 km | 11.765 ∠ 58.050 | 2.8125 | 2.75 | 2.2422 | 65.516∠60.36° | 65.516∠60.36° | Zone 1 | Y |
LLL Fault at 150 km | 11.566 ∠ 61.690 | 1.7854 | 1.2134 | 1.6457 | 41.59∠60.36° | 77.9827∠60.36° | Zone 1 | Y |
LG Fault at 250 km | 31.934 ∠ 84.010 | 1.9766 | 4.8047 | 1.875 | 111.924∠60.36° | 209.858∠60.36° | Zone 1 | Y |
LL Fault at 250 km | 32.092 ∠ 84.440 | 4.3359 | 5.1328 | 2.0313 | 119.567∠60.36° | 224.188∠60.36° | Zone 1 | Y |
LLG Fault at 250 km | 35.082 ∠ − 273.070 | 1.6484 | 2.2266 | 5.4453 | 126.847∠60.36° | 237.838∠60.36° | Zone 1 | Y |
LLL Fault at 250 km | 34.394 ∠ 84.890 | 4.9063 | 5.1719 | 5.7969 | 135.037∠60.36° | 253.195∠60.36° | Zone 1 | Y |
LLG Fault at 300 km | 48.136 ∠ 80.370 | 2.4688 | 4.0469 | 4.375 | 101.914∠60.36° | 191.090∠60.36° | Zone 1 | Y |
LG Fault at 350 km | 75.180 ∠ 83.110 | 2.8906 | 5.2188 | 2.7188 | 121.570∠60.36° | 227.945∠60.36° | Zone 2 | Y |
LL Fault at 350 km | 82.706 ∠ 83.210 | 2.6641 | 5.125 | 6.0469 | 140.861∠60.36° | 264.114∠60.36° | Zone 2 | Y |
LLL Fault at 350 km | 76.616 ∠ 79.090 | 4.9609 | 5.5234 | 5.8047 | 128.666∠60.36° | 241.249∠60.36° | Zone 2 | Y |