Table 3 Influence of system asymmetry on neutral voltage and sequence current ratio
Group | Ungrounded | Arc suppression coil grounded | Low resistance grounded | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
λ(%) | Uunb(V) | UO(V) | n1 | λ(%) | Uunb(V) | UO(V) | n1 | λ(%) | Uunb(V) | UO(V) | n1 | |
1 | 0 | 0.28 | 410.55 | 1 | 0 | 2.26 | 4016.37 | 1 | 0 | 0 | 48.31 | 1 |
2 | 0.29 | 16.05 | 412.44 | 1 | 2.88 | 113.27 | 4058.79 | 1 | 0.03 | 1.97 | 50.10 | 1 |
3 | 0.43 | 23.86 | 418.64 | 1 | 4.30 | 235.21 | 4101.22 | 1 | 0.05 | 2.91 | 51.15 | 1 |
4 | 0.83 | 45.61 | 437.84 | 1 | 8.25 | 403.05 | 4115.36 | 1 | 0.09 | 5.59 | 53.46 | 1 |
5 | 1.10 | 60.88 | 454.32 | 1 | 10.9 | 551.54 | 4131.93 | 1 | 0.12 | 7.42 | 55.15 | 1 |