Transmission & Distribution Line Lightning Performance
Sigma SLP: Software for Lightning Performance
Case study: Multiple studies
Single shielded one circuit OHL (132kV) is studied with Sigma SLP is order to compute lightning performance as function of:
- Tower footing resistance
- Insulation level (U50% – CFO)
- Application of LSA to different phases
Overall Total Flashover Rate is reduced with Case 3 and Case 4 as function of tower footing resistance & insulation level.
Case 3: LSA on bottom and middle phase
Case 4: LSA on bottom and top phase
With lower insulation level (770kV on the left), total flashover rate is more reduced with LSA as per Case 3 instead of Case 4 starting from tower footing resistances of 30 Ohm and more