I'm sure it can. You need to account for the physical properties of the particular conductor material, such as stress/strain characteristics, thermal expansion and creep.
You can use Excel for simple catenaries without stress/strain characteristics, thermal expansion, and creep if you are only interested in one loading/temperature condition.
You need these conductor characteristics if you need to find the sag-tension at a different loading/temperature condition. For instance, you might want to calculate the stringing sag and tension at 60°F to get a sag at 120° final with wind. For this, an Excel spreadsheet may not be feasible because the calcuations are pretty complex, especially for a composite conductor like ACSR.
