try except on zero turbulence power curve
try except on zero turbulence power curve

try except on zero turbulence power curve - this should remove the
occurrences of non-convergence causing run failures.

MVAppleby/PCWG,clembou/PCWG,peterdougstuart/PCWG,etraiger/PCWG,GregMJP/PCWG,aclerc/PCWG,coillarach/PCWG,lcameron05/PCWG