# Lightning Protection Methods for Wind Turbine Blades: An Alternative Approach
## 4 ANSYS Workbench Implementation
### Results from Hybrid Case Studies
#### 5.2.3 Case Study F: Hybrid Conductor Design, 5 m Sides  
The thicker portion of the conductor has been further increased to 5 m on each side of the tip of the blade, in theory, further reducing the recorded values where results are tabulated in Table 7. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**First Strokes** & **LPL0** & **LPL I** & **LPL II** & **LPL III-IV** \\  & **300 kA** & **200 kA** & **150 kA** & **100 kA** \\ \hline Voltage at striking point (V) & 2773.4 & 1848.9 & 1386.7 & 924.45 \\ Maximum joule heating (MW/m\({}^{3}\)) & 66,067 & 29,363 & 16,517 & 7340.8 \\ Current density at striking point (kA/m\({}^{2}\)) & 844,930 & 563,290 & 422,470 & 281,640 \\ Maximum temperature (\({}^{\circ}\)C) & 237.15 & 117.62 & 75.788 & 45.906 \\ Total deformation (mm) & 1.355 & 0.6034 & 0.3404 & 0.1525 \\ Current density at joints (kA/m\({}^{2}\)) & 2,072,100 & 1,381,400 & 1,036,100 & 690,700 \\ \hline
**Subsequent Strokes** & **LPL 0** & **LPL I** & **LPL II** & **LPL III-IV** \\  & **75 kA** & **50 kA** & **37.5 kA** & **25 kA** \\ \hline Voltage at striking point (V) & 693.34 & 462.23 & 346.67 & 23.11 \\ Maximum joule heating (MW/m\({}^{3}\)) & 4129.2 & 1631.3 & 1032.3 & 458.8 \\ Current density at striking point (kA/m\({}^{2}\)) & 211,230 & 140,820 & 105,620 & 70,411 \\ Maximum temperature (\({}^{\circ}\)C) & 35,447 & 27.978 & 25,362 & 23,494 \\ Total deformation (mm) & 0.0867 & 0.0398 & 0.0234 & 0.0118 \\ Current density at joints (kA/m\({}^{2}\)) & 518,030 & 345,350 & 259,010 & 172,680 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Results obtained from the first and subsequent return strokes for **Case Study E**. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**First Strokes** & **LPL0** & **LPL I** & **LPL II** & **LPL III-IV** \\  & **300 kA** & **200 kA** & **150 kA** & **100 kA** \\ \hline Voltage at striking point (V) & 2691.2 & 1794.1 & 1345.6 & 897.06 \\ Maximum joule heating (MW/m\({}^{3}\)) & 64,236 & 28,549 & 16,059 & 7137.3 \\ Current density at striking point (kA/m\({}^{2}\)) & 495,610 & 330,410 & 247,800 & 165,200 \\ Maximum temperature (\({}^{\circ}\)C) & 218.42 & 115.85 & 74.788 & 45.461 \\ Total deformation (mm) & 1.216 & 0.5420 & 0.3061 & 0.1376 \\ Current density at joints (kA/m\({}^{2}\)) & 1,999,800 & 1,333,200 & 999,910 & 666,610 \\ \hline
**Subsequent Strokes** & **LPL 0** & **LPL I** & **LPL II** & **LPL III-IV** \\  & **75 kA** & **50 kA** & **37.5 kA** & **25 kA** \\ \hline Voltage at striking point (V) & 672.8 & 488.53 & 336.4 & 224.27 \\ Maximum joule heating (MW/m\({}^{3}\)) & 4014.7 & 1784.3 & 1003.7 & 446.08 \\ Current density at striking point (kA/m\({}^{2}\)) & 123,900 & 82,601 & 61,951 & 41,301 \\ Maximum temperature (\({}^{\circ}\)C) & 35,197 & 27.865 & 25.299 & 23,466 \\ Total deformation (mm) & 0.0787 & 0.0366 & 0.0218 & 0.0114 \\ Current density at joints (kA/m\({}^{2}\)) & 499,960 & 333,300 & 249,980 & 166,650 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Results obtained from the first and subsequent return strokes for **Case Study F**.