Table 8 Performance of distance relay RA with PAZSD methodology for different faults with FR = 1.7 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) | ||
LL Fault at 50 km | 4.496 ∠ 47.980 | 1.2813 | 1.2578 | 1.7422 | 40.584∠60.36° | 76.095∠60.36° | Zone 1 | Y |
LLG Fault at 50 km | 3.895 ∠ 59.410 | 1.5547 | 1.3125 | 1.2969 | 36.216∠60.36° | 67.906∠60.36° | Zone 1 | Y |
LG Fault at 150 km | 14.445 ∠ 53.480 | 2.6328 | 1.7969 | 2.2969 | 61.330∠60.36° | 114.994∠60.36° | Zone 1 | Y |
LL Fault at 150 km | 11.114 ∠ 54.070 | 2.7891 | 2.6406 | 2.0625 | 64.971∠60.36° | 121.821∠60.36° | Zone 1 | Y |
LL Fault at 250 km | 31.75 ∠ − 275.120 | 4.3359 | 5.1324 | 2.0313 | 119.558∠60.36° | 224.191∠60.36° | Zone 1 | Y |
LLG Fault at 250 km | 32.444 ∠ 51.750 | 3.9063 | 2.0938 | 5.4219 | 126.302∠60.36° | 236.816∠60.36° | Zone 1 | Y |
LLG Fault at 300 km | 53.717 ∠ 87.030 | 2.2109 | 4.6016 | 5.1328 | 119.567∠60.36° | 224.188∠60.36° | Zone 1 | Y |
LLL Fault at 300 km | 50.457 ∠ 79.350 | 3.7734 | 2.2344 | 4.7109 | 109.739∠60.36° | 205.761∠60.36° | Zone 1 | Y |
LLG Fault at 350 km | 81.044 ∠ 61.890 | 2.7031 | 5.4375 | 5.3359 | 126.665∠60.36° | 237.497∠60.36° | Zone 2 | Y |
LLL Fault at 350 km | 76.823 ∠ 76.770 | 4.6797 | 5.1719 | 5.4922 | 127.939∠60.36° | 239.886∠60.36° | Zone 2 | Y |