: It uses certificate-based licensing . While you can work offline, the license "checkout period" is 28 days. Simply connecting to the internet and launching the software refreshes this cycle.
The commercial version of PSCAD offers a wide range of features, including: pscad free version download
These alternatives may not offer the same level of functionality as PSCAD, but they can still be useful for power system analysis and simulation. : It uses certificate-based licensing