Great News on Oct. 16, 2023.
In v2.0.0, STEPS for the very first time fully supports the THREE major functions of power system analysis: powerflow solution, short circuit analysis, and dynamic simulation. See details in commit [5fccff9].
Here is a Windows version of stepspy with 'libSTEPS.dll'. Just download, unpack, and enjoy.
If you want to try Linux version, follow instructions below or contact maintainer.
-- How to build STEPS kernel: https://github.com/changgang/steps/wiki/How-to-build-STEPS-kernel
-- How to install stepspy module to Python: https://github.com/changgang/steps/wiki/How-to-install-stepspy-in-Python