Transmission line 464L is a double-circuit 138 kV tap from an existing AltaLink line to the City of Red Deer’s Timberland Substation. The transmission line is now being built with a lightening specification after a lightening study was completed for the line configuration.
Using a PLS Cadd model of the line design and lightning data for the area, CANA High Voltage (CHV) completed the lightning study. The study confirmed line geometry and determined structure grounding resistance to provide the specified lightning performance. Technical evaluation was completed with a combination of manual calculation, and software analysis with IEEE Flash and CDEGS.